refactor(arbiter-client): rewrite errors to terrros

.claude/memory/feedback_widget_decomposition.md

@@ -1,11 +0,0 @@
----
-name: Widget decomposition and provider subscriptions
-description: Prefer splitting screens into multiple focused files/widgets; each widget subscribes to its own relevant providers
-type: feedback
----
-
-Split screens into multiple smaller widgets across multiple files. Each widget should subscribe only to the providers it needs (`ref.watch` at lowest possible level), rather than having one large screen widget that watches everything and passes data down as parameters.
-
-**Why:** Reduces unnecessary rebuilds; improves readability; each file has one clear responsibility.
-
-**How to apply:** When building a new screen, identify which sub-widgets need their own provider subscriptions and extract them into separate files (e.g., `widgets/grant_card.dart` watches enrichment providers itself, rather than the screen doing it and passing resolved strings down).

.gitignore

@@ -3,4 +3,3 @@ scripts/__pycache__/
 .DS_Store
 .cargo/config.toml
 .vscode/
-docs/

.woodpecker/server-test.yaml

@@ -24,4 +24,4 @@ steps:
       - mise install rust 
       - mise install protoc
       - mise install cargo:cargo-nextest
-      - mise exec cargo:cargo-nextest -- cargo nextest run --no-fail-fast --all-features
+      - mise exec cargo:cargo-nextest -- cargo nextest run --no-fail-fast

AGENTS.md

@@ -67,7 +67,7 @@ The server is actor-based using the **kameo** crate. All long-lived state lives
 
 - **`Bootstrapper`** — Manages the one-time bootstrap token written to `~/.arbiter/bootstrap_token` on first run.
 - **`KeyHolder`** — Holds the encrypted root key and manages the Sealed/Unsealed vault state machine. On unseal, decrypts the root key into a `memsafe` hardened memory cell.
-- **`FlowCoordinator`** — Coordinates cross-connection flow between user agents and SDK clients.
+- **`MessageRouter`** — Coordinates streaming messages between user agents and SDK clients.
 - **`EvmActor`** — Handles EVM transaction policy enforcement and signing.
 
 Per-connection actors live under `actors/user_agent/` and `actors/client/`, each with `auth` (challenge-response authentication) and `session` (post-auth operations) sub-modules.

ARCHITECTURE.md

@@ -11,7 +11,6 @@ Arbiter distinguishes two kinds of peers:
 
 - **User Agent** — A client application used by the owner to manage the vault (create wallets, approve SDK clients, configure policies).
 - **SDK Client** — A consumer of signing capabilities, typically an automation tool. In the future, this could include a browser-based wallet.
-- **Recovery Operator** — A dormant recovery participant with narrowly scoped authority used only for custody recovery and operator replacement.
 
 ---
 
@@ -43,149 +42,7 @@ There is no bootstrap mechanism for SDK clients. They must be explicitly approve
 
 ---
 
-## 3. Multi-Operator Governance
+## 3. Server Identity
-
-When more than one User Agent is registered, the vault is treated as having multiple operators. In that mode, sensitive actions are governed by voting rather than by a single operator decision.
-
-### 3.1 Voting Rules
-
-Voting is based on the total number of registered operators:
-
-- **1 operator:** no vote is needed; the single operator decides directly.
-- **2 operators:** full consensus is required; both operators must approve.
-- **3 or more operators:** quorum is `floor(N / 2) + 1`.
-
-For a decision to count, the operator's approval or rejection must be signed by that operator's associated key. Unsigned votes, or votes that fail signature verification, are ignored.
-
-Examples:
-
-- **3 operators:** 2 approvals required
-- **4 operators:** 3 approvals required
-
-### 3.2 Actions Requiring a Vote
-
-In multi-operator mode, a successful vote is required for:
-
-- approving new SDK clients
-- granting an SDK client visibility to a wallet
-- approving a one-off transaction
-- approving creation of a persistent grant
-- approving operator replacement
-- approving server updates
-- updating Shamir secret-sharing parameters
-
-### 3.3 Special Rule for Key Rotation
-
-Key rotation always requires full quorum, regardless of the normal voting threshold.
-
-This is stricter than ordinary governance actions because rotating the root key requires every operator to participate in coordinated share refresh/update steps. The root key itself is not redistributed directly, but each operator's share material must be changed consistently.
-
-### 3.4 Root Key Custody
-
-When the vault has multiple operators, the vault root key is protected using Shamir secret sharing.
-
-The vault root key is encrypted in a way that requires reconstruction from user-held shares rather than from a single shared password.
-
-For ordinary operators, the Shamir threshold matches the ordinary governance quorum. For example:
-
-- **2 operators:** `2-of-2`
-- **3 operators:** `2-of-3`
-- **4 operators:** `3-of-4`
-
-In practice, the Shamir share set also includes Recovery Operator shares. This means the effective Shamir parameters are computed over the combined share pool while keeping the same threshold. For example:
-
-- **3 ordinary operators + 2 recovery shares:** `2-of-5`
-
-This ensures that the normal custody threshold follows the ordinary operator quorum, while still allowing dormant recovery shares to exist for break-glass recovery flows.
-
-### 3.5 Recovery Operators
-
-Recovery Operators are a separate peer type from ordinary vault operators.
-
-Their role is intentionally narrow. They can only:
-
-- participate in unsealing the vault
-- vote for operator replacement
-
-Recovery Operators do not participate in routine governance such as approving SDK clients, granting wallet visibility, approving transactions, creating grants, approving server updates, or changing Shamir parameters.
-
-### 3.6 Sleeping and Waking Recovery Operators
-
-By default, Recovery Operators are **sleeping** and do not participate in any active flow.
-
-Any ordinary operator may request that Recovery Operators **wake up**.
-
-Any ordinary operator may also cancel a pending wake-up request.
-
-This creates a dispute window before recovery powers become active. The default wake-up delay is **14 days**.
-
-Recovery Operators are therefore part of the break-glass recovery path rather than the normal operating quorum.
-
-The high-level recovery flow is:
-
-```mermaid
-sequenceDiagram
-    autonumber
-    actor Op as Ordinary Operator
-    participant Server
-    actor Other as Other Operator
-    actor Rec as Recovery Operator
-
-    Op->>Server: Request recovery wake-up
-    Server-->>Op: Wake-up pending
-    Note over Server: Default dispute window: 14 days
-
-    alt Wake-up cancelled during dispute window
-        Other->>Server: Cancel wake-up
-        Server-->>Op: Recovery cancelled
-        Server-->>Rec: Stay sleeping
-    else No cancellation for 14 days
-        Server-->>Rec: Wake up
-        Rec->>Server: Join recovery flow
-        critical Recovery authority
-            Rec->>Server: Participate in unseal
-            Rec->>Server: Vote on operator replacement
-        end
-        Server-->>Op: Recovery mode active
-    end
-```
-
-### 3.7 Committee Formation
-
-There are two ways to form a multi-operator committee:
-
-- convert an existing single-operator vault by adding new operators
-- bootstrap an unbootstrapped vault directly into multi-operator mode
-
-In both cases, committee formation is a coordinated process. Arbiter does not allow multi-operator custody to emerge implicitly from unrelated registrations.
-
-### 3.8 Bootstrapping an Unbootstrapped Vault into Multi-Operator Mode
-
-When an unbootstrapped vault is initialized as a multi-operator vault, the setup proceeds as follows:
-
-1. An operator connects to the unbootstrapped vault using a User Agent and the bootstrap token.
-2. During bootstrap setup, that operator declares:
-   - the total number of ordinary operators
-   - the total number of Recovery Operators
-3. The vault enters **multi-bootstrap mode**.
-4. While in multi-bootstrap mode:
-   - every ordinary operator must connect with a User Agent using the bootstrap token
-   - every Recovery Operator must also connect using the bootstrap token
-   - each participant is registered individually
-   - each participant's share is created and protected with that participant's credentials
-5. The vault is considered fully bootstrapped only after all declared operator and recovery-share registrations have completed successfully.
-
-This means the operator and recovery set is fixed at bootstrap completion time, based on the counts declared when multi-bootstrap mode was entered.
-
-### 3.9 Special Bootstrap Constraint for Two-Operator Vaults
-
-If a vault is declared with exactly **2 ordinary operators**, Arbiter requires at least **1 Recovery Operator** to be configured during bootstrap.
-
-This prevents the worst-case custody failure in which a `2-of-2` operator set becomes permanently unrecoverable after loss of a single operator.
-
----
-
-## 4. Server Identity
 
 The server proves its identity using TLS with a self-signed certificate. The TLS private key is generated on first run and is long-term; no rotation mechanism exists yet due to the complexity of multi-peer coordination.
 
@@ -198,9 +55,9 @@ Peers verify the server by its **public key fingerprint**:
 
 ---
 
-## 5. Key Management
+## 4. Key Management
 
-### 5.1 Key Hierarchy
+### 4.1 Key Hierarchy
 
 There are three layers of keys:
 
@@ -215,19 +72,19 @@ This layered design enables:
 - **Password rotation** without re-encrypting every wallet key (only the root key is re-encrypted).
 - **Root key rotation** without requiring the user to change their password.
 
-### 5.2 Encryption at Rest
+### 4.2 Encryption at Rest
 
 The database stores everything in encrypted form using symmetric AEAD. The encryption scheme is versioned to support transparent migration — when the vault unseals, Arbiter automatically re-encrypts any entries that are behind the current scheme version. See [IMPLEMENTATION.md](IMPLEMENTATION.md) for the specific scheme and versioning mechanism.
 
 ---
 
-## 6. Vault Lifecycle
+## 5. Vault Lifecycle
 
-### 6.1 Sealed State
+### 5.1 Sealed State
 
 On boot, the root key is encrypted and the server cannot perform any signing operations. This state is called **Sealed**.
 
-### 6.2 Unseal Flow
+### 5.2 Unseal Flow
 
 To transition to the **Unsealed** state, a User Agent must provide the password:
 
@@ -238,7 +95,7 @@ To transition to the **Unsealed** state, a User Agent must provide the password:
    - **Success:** The root key is decrypted and placed into a hardened memory cell. The server transitions to `Unsealed`. Any entries pending encryption scheme migration are re-encrypted.
    - **Failure:** The server returns an error indicating the password is incorrect.
 
-### 6.3 Memory Protection
+### 5.3 Memory Protection
 
 Once unsealed, the root key must be protected in memory against:
 
@@ -250,9 +107,9 @@ See [IMPLEMENTATION.md](IMPLEMENTATION.md) for the current and planned memory pr
 
 ---
 
-## 7. Permission Engine
+## 6. Permission Engine
 
-### 7.1 Fundamental Rules
+### 6.1 Fundamental Rules
 
 - SDK clients have **no access by default**.
 - Access is granted **explicitly** by a User Agent.
@@ -262,45 +119,11 @@ Each blockchain requires its own policy system due to differences in static tran
 
 Arbiter is also responsible for ensuring that **transaction nonces are never reused**.
 
-### 7.2 EVM Policies
+### 6.2 EVM Policies
 
 Every EVM grant is scoped to a specific **wallet** and **chain ID**.
 
-#### 7.2.0 Transaction Signing Sequence
+#### 6.2.1 Transaction Sub-Grants
-
-The high-level interaction order is:
-
-```mermaid
-sequenceDiagram
-    autonumber
-    actor SDK as SDK Client
-    participant Server
-    participant UA as User Agent
-
-    SDK->>Server: SignTransactionRequest
-    Server->>Server: Resolve wallet and wallet visibility
-    alt Visibility approval required
-        Server->>UA: Ask for wallet visibility approval
-        UA-->>Server: Vote result
-    end
-    Server->>Server: Evaluate transaction
-    Server->>Server: Load grant and limits context
-    alt Grant approval required
-        Server->>UA: Ask for execution / grant approval
-        UA-->>Server: Vote result
-        opt Create persistent grant
-            Server->>Server: Create and store grant
-        end
-        Server->>Server: Retry evaluation
-    end
-    critical Final authorization path
-        Server->>Server: Check limits and record execution
-        Server-->>Server: Signature or evaluation error
-    end
-    Server-->>SDK: Signature or error
-```
-
-#### 7.2.1 Transaction Sub-Grants
 
 Arbiter maintains an ever-expanding database of known contracts and their ABIs. Based on contract knowledge, transaction requests fall into three categories:
 
@@ -324,9 +147,9 @@ Available restrictions:
 
 These transactions have no `calldata` and therefore cannot interact with contracts. They can be subject to the same volume and rate restrictions as above.
 
-#### 7.2.2 Global Limits
+#### 6.2.2 Global Limits
 
 In addition to sub-grant-specific restrictions, the following limits can be applied across all grant types:
 
 - **Gas limit** — Maximum gas per transaction.
-- **Time-window restrictions** — e.g., signing allowed only 08:00–20:00 on Mondays and Thursdays.
+- **Time-window restrictions** — e.g., signing allowed only 08:00–20:00 on Mondays and Thursdays.

CLAUDE.md

@@ -67,7 +67,7 @@ The server is actor-based using the **kameo** crate. All long-lived state lives
 
 - **`Bootstrapper`** — Manages the one-time bootstrap token written to `~/.arbiter/bootstrap_token` on first run.
 - **`KeyHolder`** — Holds the encrypted root key and manages the Sealed/Unsealed vault state machine. On unseal, decrypts the root key into a `memsafe` hardened memory cell.
-- **`FlowCoordinator`** — Coordinates cross-connection flow between user agents and SDK clients.
+- **`MessageRouter`** — Coordinates streaming messages between user agents and SDK clients.
 - **`EvmActor`** — Handles EVM transaction policy enforcement and signing.
 
 Per-connection actors live under `actors/user_agent/` and `actors/client/`, each with `auth` (challenge-response authentication) and `session` (post-auth operations) sub-modules.

IMPLEMENTATION.md

@@ -67,14 +67,7 @@ The `program_client.nonce` column stores the **next usable nonce** — i.e. it i
 ## Cryptography
 
 ### Authentication
-- **Client protocol:** ML-DSA
+- **Signature scheme:** ed25519
-
-### User-Agent Authentication
-
-User-agent authentication supports multiple signature schemes because platform-provided "hardware-bound" keys do not expose a uniform algorithm across operating systems and hardware.
-
-- **Supported schemes:** ML-DSA
-- **Why:** Secure Enclave (MacOS) support them natively, on other platforms we could emulate while they roll-out
 
 ### Encryption at Rest
 - **Scheme:** Symmetric AEAD — currently **XChaCha20-Poly1305**
@@ -124,52 +117,6 @@ The central abstraction is the `Policy` trait. Each implementation handles one s
 4. **Evaluate** — `Policy::evaluate` checks the decoded meaning against the grant's policy-specific constraints and returns any violations.
 5. **Record** — If `RunKind::Execution` and there are no violations, the engine writes to `evm_transaction_log` and calls `Policy::record_transaction` for any policy-specific logging (e.g., token transfer volume).
 
-The detailed branch structure is shown below:
-
-```mermaid
-flowchart TD
-    A[SDK Client sends sign transaction request] --> B[Server resolves wallet]
-    B --> C{Wallet exists?}
-
-    C -- No --> Z1[Return wallet not found error]
-    C -- Yes --> D[Check SDK client wallet visibility]
-
-    D --> E{Wallet visible to SDK client?}
-    E -- No --> F[Start wallet visibility voting flow]
-    F --> G{Vote approved?}
-    G -- No --> Z2[Return wallet access denied error]
-    G -- Yes --> H[Persist wallet visibility]
-    E -- Yes --> I[Classify transaction meaning]
-    H --> I
-
-    I --> J{Meaning supported?}
-    J -- No --> Z3[Return unsupported transaction error]
-    J -- Yes --> K[Find matching grant]
-
-    K --> L{Grant exists?}
-    L -- Yes --> M[Check grant limits]
-    L -- No --> N[Start execution or grant voting flow]
-
-    N --> O{User-agent decision}
-    O -- Reject --> Z4[Return no matching grant error]
-    O -- Allow once --> M
-    O -- Create grant --> P[Create grant with user-selected limits]
-    P --> Q[Persist grant]
-    Q --> M
-
-    M --> R{Limits exceeded?}
-    R -- Yes --> Z5[Return evaluation error]
-    R -- No --> S[Record transaction in logs]
-    S --> T[Produce signature]
-    T --> U[Return signature to SDK client]
-
-    note1[Limit checks include volume, count, and gas constraints.]
-    note2[Grant lookup depends on classified meaning, such as ether transfer or token transfer.]
-
-    K -. uses .-> note2
-    M -. checks .-> note1
-```
-
 ### Policy Trait
 
 | Method | Purpose |
@@ -201,7 +148,7 @@ flowchart TD
 Every grant has two layers:
 
 - **Shared (`evm_basic_grant`)** — wallet, chain, validity period, gas fee caps, transaction count rate limit. One row per grant regardless of type.
-- **Specific** — policy-owned tables (`evm_ether_transfer_grant`, `evm_token_transfer_grant`) holding type-specific configuration.
+- **Specific** — policy-owned tables (`evm_ether_transfer_grant`, `evm_token_transfer_grant`, etc.) holding type-specific configuration.
 
 `find_all_grants` uses a `#[diesel::auto_type]` base join between the specific and shared tables, then batch-loads related rows (targets, volume limits) in two additional queries to avoid N+1.
 
@@ -224,6 +171,7 @@ These are checked centrally in `check_shared_constraints` before policy evaluati
 - **Only EIP-1559 transactions are supported.** Legacy and EIP-2930 types are rejected outright.
 - **No opaque-calldata (unknown contract) grant type.** The architecture describes a category for unrecognised contracts, but no policy implements it yet. Any transaction that is not a plain ETH transfer or a known ERC-20 transfer is unconditionally rejected.
 - **Token registry is static.** Tokens are recognised only if they appear in the hard-coded `arbiter_tokens_registry` crate. There is no mechanism to register additional contracts at runtime.
+- **Nonce management is not implemented.** The architecture lists nonce deduplication as a core responsibility, but no nonce tracking or enforcement exists yet.
 
 ---
 
@@ -231,5 +179,5 @@ These are checked centrally in `check_shared_constraints` before policy evaluati
 
 The unsealed root key must be held in a hardened memory cell resistant to dumps, page swaps, and hibernation.
 
-- **Current:** A dedicated memory-protection abstraction is in place, with `memsafe` used behind that abstraction today
+- **Current:** Using the `memsafe` crate as an interim solution
-- **Planned:** Additional backends can be introduced behind the same abstraction, including a custom implementation based on `mlock` (Unix) and `VirtualProtect` (Windows)
+- **Planned:** Custom implementation based on `mlock` (Unix) and `VirtualProtect` (Windows)

docs/superpowers/plans/2026-03-28-grant-grid-view.md

@@ -1,821 +0,0 @@
-# Grant Grid View Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** Add an "EVM Grants" dashboard tab that displays all grants as enriched cards (type, chain, wallet address, client name) with per-card revoke support.
-
-**Architecture:** A new `walletAccessListProvider` fetches wallet accesses with their DB row IDs. The screen (`grants.dart`) watches only `evmGrantsProvider` for top-level state. Each `GrantCard` widget (its own file) watches enrichment providers (`walletAccessListProvider`, `evmProvider`, `sdkClientsProvider`) and the revoke mutation directly — keeping rebuilds scoped to the card. The screen is registered as a dashboard tab in `AdaptiveScaffold`.
-
-**Tech Stack:** Flutter, Riverpod (`riverpod_annotation` + `build_runner` codegen), `sizer` (adaptive sizing), `auto_route`, Protocol Buffers (Dart), `Palette` design tokens.
-
----
-
-## File Map
-
-| File | Action | Responsibility |
-|---|---|---|
-| `useragent/lib/theme/palette.dart` | Modify | Add `Palette.token` (indigo accent for token-transfer cards) |
-| `useragent/lib/features/connection/evm/wallet_access.dart` | Modify | Add `listAllWalletAccesses()` function |
-| `useragent/lib/providers/sdk_clients/wallet_access_list.dart` | Create | `WalletAccessListProvider` — fetches full wallet access list with IDs |
-| `useragent/lib/screens/dashboard/evm/grants/widgets/grant_card.dart` | Create | `GrantCard` widget — watches enrichment providers + revoke mutation; one card per grant |
-| `useragent/lib/screens/dashboard/evm/grants/grants.dart` | Create | `EvmGrantsScreen` — watches `evmGrantsProvider`; handles loading/error/empty/data states; renders `GrantCard` list |
-| `useragent/lib/router.dart` | Modify | Register `EvmGrantsRoute` in dashboard children |
-| `useragent/lib/screens/dashboard.dart` | Modify | Add Grants entry to `routes` list and `NavigationDestination` list |
-
----
-
-## Task 1: Add `Palette.token`
-
-**Files:**
-- Modify: `useragent/lib/theme/palette.dart`
-
-- [ ] **Step 1: Add the color**
-
-Replace the contents of `useragent/lib/theme/palette.dart` with:
-
-```dart
-import 'package:flutter/material.dart';
-
-class Palette {
-  static const ink = Color(0xFF15263C);
-  static const coral = Color(0xFFE26254);
-  static const cream = Color(0xFFFFFAF4);
-  static const line = Color(0x1A15263C);
-  static const token = Color(0xFF5C6BC0);
-}
-```
-
-- [ ] **Step 2: Verify**
-
-```sh
-cd useragent && flutter analyze lib/theme/palette.dart
-```
-
-Expected: no issues.
-
-- [ ] **Step 3: Commit**
-
-```sh
-jj describe -m "feat(theme): add Palette.token for token-transfer grant cards"
-jj new
-```
-
----
-
-## Task 2: Add `listAllWalletAccesses` feature function
-
-**Files:**
-- Modify: `useragent/lib/features/connection/evm/wallet_access.dart`
-
-`readClientWalletAccess` (existing) filters the list to one client's wallet IDs and returns `Set<int>`. This new function returns the complete unfiltered list with row IDs so the grant cards can resolve wallet_access_id → wallet + client.
-
-- [ ] **Step 1: Append function**
-
-Add at the bottom of `useragent/lib/features/connection/evm/wallet_access.dart`:
-
-```dart
-Future<List<SdkClientWalletAccess>> listAllWalletAccesses(
-  Connection connection,
-) async {
-  final response = await connection.ask(
-    UserAgentRequest(listWalletAccess: Empty()),
-  );
-  if (!response.hasListWalletAccessResponse()) {
-    throw Exception(
-      'Expected list wallet access response, got ${response.whichPayload()}',
-    );
-  }
-  return response.listWalletAccessResponse.accesses.toList(growable: false);
-}
-```
-
-Each returned `SdkClientWalletAccess` has:
-- `.id` — the `evm_wallet_access` row ID (same value as `wallet_access_id` in a `GrantEntry`)
-- `.access.walletId` — the EVM wallet DB ID
-- `.access.sdkClientId` — the SDK client DB ID
-
-- [ ] **Step 2: Verify**
-
-```sh
-cd useragent && flutter analyze lib/features/connection/evm/wallet_access.dart
-```
-
-Expected: no issues.
-
-- [ ] **Step 3: Commit**
-
-```sh
-jj describe -m "feat(evm): add listAllWalletAccesses feature function"
-jj new
-```
-
----
-
-## Task 3: Create `WalletAccessListProvider`
-
-**Files:**
-- Create: `useragent/lib/providers/sdk_clients/wallet_access_list.dart`
-- Generated: `useragent/lib/providers/sdk_clients/wallet_access_list.g.dart`
-
-Mirrors the structure of `EvmGrants` in `providers/evm/evm_grants.dart` — class-based `@riverpod` with a `refresh()` method.
-
-- [ ] **Step 1: Write the provider**
-
-Create `useragent/lib/providers/sdk_clients/wallet_access_list.dart`:
-
-```dart
-import 'package:arbiter/features/connection/evm/wallet_access.dart';
-import 'package:arbiter/proto/user_agent.pb.dart';
-import 'package:arbiter/providers/connection/connection_manager.dart';
-import 'package:mtcore/markettakers.dart';
-import 'package:riverpod_annotation/riverpod_annotation.dart';
-
-part 'wallet_access_list.g.dart';
-
-@riverpod
-class WalletAccessList extends _$WalletAccessList {
-  @override
-  Future<List<SdkClientWalletAccess>?> build() async {
-    final connection = await ref.watch(connectionManagerProvider.future);
-    if (connection == null) {
-      return null;
-    }
-
-    try {
-      return await listAllWalletAccesses(connection);
-    } catch (e, st) {
-      talker.handle(e, st);
-      rethrow;
-    }
-  }
-
-  Future<void> refresh() async {
-    final connection = await ref.read(connectionManagerProvider.future);
-    if (connection == null) {
-      state = const AsyncData(null);
-      return;
-    }
-
-    state = const AsyncLoading();
-    state = await AsyncValue.guard(() => listAllWalletAccesses(connection));
-  }
-}
-```
-
-- [ ] **Step 2: Run code generation**
-
-```sh
-cd useragent && dart run build_runner build --delete-conflicting-outputs
-```
-
-Expected: `useragent/lib/providers/sdk_clients/wallet_access_list.g.dart` created. No errors.
-
-- [ ] **Step 3: Verify**
-
-```sh
-cd useragent && flutter analyze lib/providers/sdk_clients/
-```
-
-Expected: no issues.
-
-- [ ] **Step 4: Commit**
-
-```sh
-jj describe -m "feat(providers): add WalletAccessListProvider"
-jj new
-```
-
----
-
-## Task 4: Create `GrantCard` widget
-
-**Files:**
-- Create: `useragent/lib/screens/dashboard/evm/grants/widgets/grant_card.dart`
-
-This widget owns all per-card logic: enrichment lookups, revoke action, and rebuild scope. The screen only passes it a `GrantEntry` — the card fetches everything else itself.
-
-**Key types:**
-- `GrantEntry` (from `proto/evm.pb.dart`): `.id`, `.shared.walletAccessId`, `.shared.chainId`, `.specific.whichGrant()`
-- `SpecificGrant_Grant.etherTransfer` / `.tokenTransfer` — enum values for the oneof
-- `SdkClientWalletAccess` (from `proto/user_agent.pb.dart`): `.id`, `.access.walletId`, `.access.sdkClientId`
-- `WalletEntry` (from `proto/evm.pb.dart`): `.id`, `.address` (List<int>)
-- `SdkClientEntry` (from `proto/user_agent.pb.dart`): `.id`, `.info.name`
-- `revokeEvmGrantMutation` — `Mutation<void>` (global; all revoke buttons disable together while any revoke is in flight)
-- `executeRevokeEvmGrant(ref, grantId: int)` — `Future<void>`
-
-- [ ] **Step 1: Write the widget**
-
-Create `useragent/lib/screens/dashboard/evm/grants/widgets/grant_card.dart`:
-
-```dart
-import 'package:arbiter/proto/evm.pb.dart';
-import 'package:arbiter/proto/user_agent.pb.dart';
-import 'package:arbiter/providers/evm/evm.dart';
-import 'package:arbiter/providers/evm/evm_grants.dart';
-import 'package:arbiter/providers/sdk_clients/list.dart';
-import 'package:arbiter/providers/sdk_clients/wallet_access_list.dart';
-import 'package:arbiter/theme/palette.dart';
-import 'package:flutter/material.dart';
-import 'package:hooks_riverpod/experimental/mutation.dart';
-import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:sizer/sizer.dart';
-
-String _shortAddress(List<int> bytes) {
-  final hex = bytes.map((b) => b.toRadixString(16).padLeft(2, '0')).join();
-  return '0x${hex.substring(0, 6)}...${hex.substring(hex.length - 4)}';
-}
-
-String _formatError(Object error) {
-  final message = error.toString();
-  if (message.startsWith('Exception: ')) {
-    return message.substring('Exception: '.length);
-  }
-  return message;
-}
-
-class GrantCard extends ConsumerWidget {
-  const GrantCard({super.key, required this.grant});
-
-  final GrantEntry grant;
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    // Enrichment lookups — each watch scopes rebuilds to this card only
-    final walletAccesses =
-        ref.watch(walletAccessListProvider).asData?.value ?? const [];
-    final wallets = ref.watch(evmProvider).asData?.value ?? const [];
-    final clients = ref.watch(sdkClientsProvider).asData?.value ?? const [];
-    final revoking = ref.watch(revokeEvmGrantMutation) is MutationPending;
-
-    final isEther =
-        grant.specific.whichGrant() == SpecificGrant_Grant.etherTransfer;
-    final accent = isEther ? Palette.coral : Palette.token;
-    final typeLabel = isEther ? 'Ether' : 'Token';
-    final theme = Theme.of(context);
-    final muted = Palette.ink.withValues(alpha: 0.62);
-
-    // Resolve wallet_access_id → wallet address + client name
-    final accessById = <int, SdkClientWalletAccess>{
-      for (final a in walletAccesses) a.id: a,
-    };
-    final walletById = <int, WalletEntry>{
-      for (final w in wallets) w.id: w,
-    };
-    final clientNameById = <int, String>{
-      for (final c in clients) c.id: c.info.name,
-    };
-
-    final accessId = grant.shared.walletAccessId;
-    final access = accessById[accessId];
-    final wallet = access != null ? walletById[access.access.walletId] : null;
-
-    final walletLabel = wallet != null
-        ? _shortAddress(wallet.address)
-        : 'Access #$accessId';
-
-    final clientLabel = () {
-      if (access == null) return '';
-      final name = clientNameById[access.access.sdkClientId] ?? '';
-      return name.isEmpty ? 'Client #${access.access.sdkClientId}' : name;
-    }();
-
-    void showError(String message) {
-      if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(message), behavior: SnackBarBehavior.floating),
-      );
-    }
-
-    Future<void> revoke() async {
-      try {
-        await executeRevokeEvmGrant(ref, grantId: grant.id);
-      } catch (e) {
-        showError(_formatError(e));
-      }
-    }
-
-    return Container(
-      decoration: BoxDecoration(
-        borderRadius: BorderRadius.circular(24),
-        color: Palette.cream.withValues(alpha: 0.92),
-        border: Border.all(color: Palette.line),
-      ),
-      child: IntrinsicHeight(
-        child: Row(
-          crossAxisAlignment: CrossAxisAlignment.stretch,
-          children: [
-            // Accent strip
-            Container(
-              width: 0.8.w,
-              decoration: BoxDecoration(
-                color: accent,
-                borderRadius: const BorderRadius.horizontal(
-                  left: Radius.circular(24),
-                ),
-              ),
-            ),
-            // Card body
-            Expanded(
-              child: Padding(
-                padding: EdgeInsets.symmetric(
-                  horizontal: 1.6.w,
-                  vertical: 1.4.h,
-                ),
-                child: Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    // Row 1: type badge · chain · spacer · revoke button
-                    Row(
-                      children: [
-                        Container(
-                          padding: EdgeInsets.symmetric(
-                            horizontal: 1.w,
-                            vertical: 0.4.h,
-                          ),
-                          decoration: BoxDecoration(
-                            color: accent.withValues(alpha: 0.15),
-                            borderRadius: BorderRadius.circular(8),
-                          ),
-                          child: Text(
-                            typeLabel,
-                            style: theme.textTheme.labelSmall?.copyWith(
-                              color: accent,
-                              fontWeight: FontWeight.w800,
-                            ),
-                          ),
-                        ),
-                        SizedBox(width: 1.w),
-                        Container(
-                          padding: EdgeInsets.symmetric(
-                            horizontal: 1.w,
-                            vertical: 0.4.h,
-                          ),
-                          decoration: BoxDecoration(
-                            color: Palette.ink.withValues(alpha: 0.06),
-                            borderRadius: BorderRadius.circular(8),
-                          ),
-                          child: Text(
-                            'Chain ${grant.shared.chainId}',
-                            style: theme.textTheme.labelSmall?.copyWith(
-                              color: muted,
-                              fontWeight: FontWeight.w700,
-                            ),
-                          ),
-                        ),
-                        const Spacer(),
-                        if (revoking)
-                          SizedBox(
-                            width: 1.8.h,
-                            height: 1.8.h,
-                            child: CircularProgressIndicator(
-                              strokeWidth: 2,
-                              color: Palette.coral,
-                            ),
-                          )
-                        else
-                          OutlinedButton.icon(
-                            onPressed: revoke,
-                            style: OutlinedButton.styleFrom(
-                              foregroundColor: Palette.coral,
-                              side: BorderSide(
-                                color: Palette.coral.withValues(alpha: 0.4),
-                              ),
-                              padding: EdgeInsets.symmetric(
-                                horizontal: 1.w,
-                                vertical: 0.6.h,
-                              ),
-                              shape: RoundedRectangleBorder(
-                                borderRadius: BorderRadius.circular(10),
-                              ),
-                            ),
-                            icon: const Icon(Icons.block_rounded, size: 16),
-                            label: const Text('Revoke'),
-                          ),
-                      ],
-                    ),
-                    SizedBox(height: 0.8.h),
-                    // Row 2: wallet address · client name
-                    Row(
-                      children: [
-                        Text(
-                          walletLabel,
-                          style: theme.textTheme.bodySmall?.copyWith(
-                            color: Palette.ink,
-                            fontFamily: 'monospace',
-                          ),
-                        ),
-                        Padding(
-                          padding: EdgeInsets.symmetric(horizontal: 0.8.w),
-                          child: Text(
-                            '·',
-                            style: theme.textTheme.bodySmall
-                                ?.copyWith(color: muted),
-                          ),
-                        ),
-                        Expanded(
-                          child: Text(
-                            clientLabel,
-                            maxLines: 1,
-                            overflow: TextOverflow.ellipsis,
-                            style: theme.textTheme.bodySmall
-                                ?.copyWith(color: muted),
-                          ),
-                        ),
-                      ],
-                    ),
-                  ],
-                ),
-              ),
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-}
-```
-
-- [ ] **Step 2: Verify**
-
-```sh
-cd useragent && flutter analyze lib/screens/dashboard/evm/grants/widgets/grant_card.dart
-```
-
-Expected: no issues.
-
-- [ ] **Step 3: Commit**
-
-```sh
-jj describe -m "feat(grants): add GrantCard widget with self-contained enrichment"
-jj new
-```
-
----
-
-## Task 5: Create `EvmGrantsScreen`
-
-**Files:**
-- Create: `useragent/lib/screens/dashboard/evm/grants/grants.dart`
-
-The screen watches only `evmGrantsProvider` for top-level state (loading / error / no connection / empty / data). When there is data it renders a list of `GrantCard` widgets — each card manages its own enrichment subscriptions.
-
-- [ ] **Step 1: Write the screen**
-
-Create `useragent/lib/screens/dashboard/evm/grants/grants.dart`:
-
-```dart
-import 'package:arbiter/proto/evm.pb.dart';
-import 'package:arbiter/providers/evm/evm_grants.dart';
-import 'package:arbiter/providers/sdk_clients/wallet_access_list.dart';
-import 'package:arbiter/router.gr.dart';
-import 'package:arbiter/screens/dashboard/evm/grants/widgets/grant_card.dart';
-import 'package:arbiter/theme/palette.dart';
-import 'package:arbiter/widgets/page_header.dart';
-import 'package:auto_route/auto_route.dart';
-import 'package:flutter/material.dart';
-import 'package:hooks_riverpod/hooks_riverpod.dart';
-import 'package:sizer/sizer.dart';
-
-String _formatError(Object error) {
-  final message = error.toString();
-  if (message.startsWith('Exception: ')) {
-    return message.substring('Exception: '.length);
-  }
-  return message;
-}
-
-// ─── State panel ──────────────────────────────────────────────────────────────
-
-class _StatePanel extends StatelessWidget {
-  const _StatePanel({
-    required this.icon,
-    required this.title,
-    required this.body,
-    this.actionLabel,
-    this.onAction,
-    this.busy = false,
-  });
-
-  final IconData icon;
-  final String title;
-  final String body;
-  final String? actionLabel;
-  final Future<void> Function()? onAction;
-  final bool busy;
-
-  @override
-  Widget build(BuildContext context) {
-    final theme = Theme.of(context);
-
-    return Container(
-      decoration: BoxDecoration(
-        borderRadius: BorderRadius.circular(24),
-        color: Palette.cream.withValues(alpha: 0.92),
-        border: Border.all(color: Palette.line),
-      ),
-      child: Padding(
-        padding: EdgeInsets.all(2.8.h),
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            if (busy)
-              SizedBox(
-                width: 2.8.h,
-                height: 2.8.h,
-                child: const CircularProgressIndicator(strokeWidth: 2.5),
-              )
-            else
-              Icon(icon, size: 34, color: Palette.coral),
-            SizedBox(height: 1.8.h),
-            Text(
-              title,
-              style: theme.textTheme.headlineSmall?.copyWith(
-                color: Palette.ink,
-                fontWeight: FontWeight.w800,
-              ),
-            ),
-            SizedBox(height: 1.h),
-            Text(
-              body,
-              style: theme.textTheme.bodyLarge?.copyWith(
-                color: Palette.ink.withValues(alpha: 0.72),
-                height: 1.5,
-              ),
-            ),
-            if (actionLabel != null && onAction != null) ...[
-              SizedBox(height: 2.h),
-              OutlinedButton.icon(
-                onPressed: () => onAction!(),
-                icon: const Icon(Icons.refresh),
-                label: Text(actionLabel!),
-              ),
-            ],
-          ],
-        ),
-      ),
-    );
-  }
-}
-
-// ─── Grant list ───────────────────────────────────────────────────────────────
-
-class _GrantList extends StatelessWidget {
-  const _GrantList({required this.grants});
-
-  final List<GrantEntry> grants;
-
-  @override
-  Widget build(BuildContext context) {
-    return Column(
-      children: [
-        for (var i = 0; i < grants.length; i++)
-          Padding(
-            padding: EdgeInsets.only(
-              bottom: i == grants.length - 1 ? 0 : 1.8.h,
-            ),
-            child: GrantCard(grant: grants[i]),
-          ),
-      ],
-    );
-  }
-}
-
-// ─── Screen ───────────────────────────────────────────────────────────────────
-
-@RoutePage()
-class EvmGrantsScreen extends ConsumerWidget {
-  const EvmGrantsScreen({super.key});
-
-  @override
-  Widget build(BuildContext context, WidgetRef ref) {
-    // Screen watches only the grant list for top-level state decisions
-    final grantsAsync = ref.watch(evmGrantsProvider);
-
-    Future<void> refresh() async {
-      await Future.wait([
-        ref.read(evmGrantsProvider.notifier).refresh(),
-        ref.read(walletAccessListProvider.notifier).refresh(),
-      ]);
-    }
-
-    void showMessage(String message) {
-      if (!context.mounted) return;
-      ScaffoldMessenger.of(context).showSnackBar(
-        SnackBar(content: Text(message), behavior: SnackBarBehavior.floating),
-      );
-    }
-
-    Future<void> safeRefresh() async {
-      try {
-        await refresh();
-      } catch (e) {
-        showMessage(_formatError(e));
-      }
-    }
-
-    final grantsState = grantsAsync.asData?.value;
-    final grants = grantsState?.grants;
-
-    final content = switch (grantsAsync) {
-      AsyncLoading() when grantsState == null => const _StatePanel(
-        icon: Icons.hourglass_top,
-        title: 'Loading grants',
-        body: 'Pulling grant registry from Arbiter.',
-        busy: true,
-      ),
-      AsyncError(:final error) => _StatePanel(
-        icon: Icons.sync_problem,
-        title: 'Grant registry unavailable',
-        body: _formatError(error),
-        actionLabel: 'Retry',
-        onAction: safeRefresh,
-      ),
-      AsyncData(:final value) when value == null => _StatePanel(
-        icon: Icons.portable_wifi_off,
-        title: 'No active server connection',
-        body: 'Reconnect to Arbiter to list EVM grants.',
-        actionLabel: 'Refresh',
-        onAction: safeRefresh,
-      ),
-      _ when grants != null && grants.isEmpty => _StatePanel(
-        icon: Icons.policy_outlined,
-        title: 'No grants yet',
-        body: 'Create a grant to allow SDK clients to sign transactions.',
-        actionLabel: 'Create grant',
-        onAction: () => context.router.push(const CreateEvmGrantRoute()),
-      ),
-      _ => _GrantList(grants: grants ?? const []),
-    };
-
-    return Scaffold(
-      body: SafeArea(
-        child: RefreshIndicator.adaptive(
-          color: Palette.ink,
-          backgroundColor: Colors.white,
-          onRefresh: safeRefresh,
-          child: ListView(
-            physics: const BouncingScrollPhysics(
-              parent: AlwaysScrollableScrollPhysics(),
-            ),
-            padding: EdgeInsets.fromLTRB(2.4.w, 2.4.h, 2.4.w, 3.2.h),
-            children: [
-              PageHeader(
-                title: 'EVM Grants',
-                isBusy: grantsAsync.isLoading,
-                actions: [
-                  FilledButton.icon(
-                    onPressed: () =>
-                        context.router.push(const CreateEvmGrantRoute()),
-                    icon: const Icon(Icons.add_rounded),
-                    label: const Text('Create grant'),
-                  ),
-                  SizedBox(width: 1.w),
-                  OutlinedButton.icon(
-                    onPressed: safeRefresh,
-                    style: OutlinedButton.styleFrom(
-                      foregroundColor: Palette.ink,
-                      side: BorderSide(color: Palette.line),
-                      padding: EdgeInsets.symmetric(
-                        horizontal: 1.4.w,
-                        vertical: 1.2.h,
-                      ),
-                      shape: RoundedRectangleBorder(
-                        borderRadius: BorderRadius.circular(14),
-                      ),
-                    ),
-                    icon: const Icon(Icons.refresh, size: 18),
-                    label: const Text('Refresh'),
-                  ),
-                ],
-              ),
-              SizedBox(height: 1.8.h),
-              content,
-            ],
-          ),
-        ),
-      ),
-    );
-  }
-}
-```
-
-- [ ] **Step 2: Verify**
-
-```sh
-cd useragent && flutter analyze lib/screens/dashboard/evm/grants/
-```
-
-Expected: no issues.
-
-- [ ] **Step 3: Commit**
-
-```sh
-jj describe -m "feat(grants): add EvmGrantsScreen"
-jj new
-```
-
----
-
-## Task 6: Wire router and dashboard tab
-
-**Files:**
-- Modify: `useragent/lib/router.dart`
-- Modify: `useragent/lib/screens/dashboard.dart`
-- Regenerated: `useragent/lib/router.gr.dart`
-
-- [ ] **Step 1: Add route to `router.dart`**
-
-Replace the contents of `useragent/lib/router.dart` with:
-
-```dart
-import 'package:auto_route/auto_route.dart';
-
-import 'router.gr.dart';
-
-@AutoRouterConfig(generateForDir: ['lib/screens'])
-class Router extends RootStackRouter {
-  @override
-  List<AutoRoute> get routes => [
-    AutoRoute(page: Bootstrap.page, path: '/bootstrap', initial: true),
-    AutoRoute(page: ServerInfoSetupRoute.page, path: '/server-info'),
-    AutoRoute(page: ServerConnectionRoute.page, path: '/server-connection'),
-    AutoRoute(page: VaultSetupRoute.page, path: '/vault'),
-    AutoRoute(page: ClientDetailsRoute.page, path: '/clients/:clientId'),
-    AutoRoute(page: CreateEvmGrantRoute.page, path: '/evm-grants/create'),
-
-    AutoRoute(
-      page: DashboardRouter.page,
-      path: '/dashboard',
-      children: [
-        AutoRoute(page: EvmRoute.page, path: 'evm'),
-        AutoRoute(page: ClientsRoute.page, path: 'clients'),
-        AutoRoute(page: EvmGrantsRoute.page, path: 'grants'),
-        AutoRoute(page: AboutRoute.page, path: 'about'),
-      ],
-    ),
-  ];
-}
-```
-
-- [ ] **Step 2: Update `dashboard.dart`**
-
-In `useragent/lib/screens/dashboard.dart`, replace the `routes` constant:
-
-```dart
-final routes = [
-  const EvmRoute(),
-  const ClientsRoute(),
-  const EvmGrantsRoute(),
-  const AboutRoute(),
-];
-```
-
-And replace the `destinations` list inside `AdaptiveScaffold`:
-
-```dart
-destinations: const [
-  NavigationDestination(
-    icon: Icon(Icons.account_balance_wallet_outlined),
-    selectedIcon: Icon(Icons.account_balance_wallet),
-    label: 'Wallets',
-  ),
-  NavigationDestination(
-    icon: Icon(Icons.devices_other_outlined),
-    selectedIcon: Icon(Icons.devices_other),
-    label: 'Clients',
-  ),
-  NavigationDestination(
-    icon: Icon(Icons.policy_outlined),
-    selectedIcon: Icon(Icons.policy),
-    label: 'Grants',
-  ),
-  NavigationDestination(
-    icon: Icon(Icons.info_outline),
-    selectedIcon: Icon(Icons.info),
-    label: 'About',
-  ),
-],
-```
-
-- [ ] **Step 3: Regenerate router**
-
-```sh
-cd useragent && dart run build_runner build --delete-conflicting-outputs
-```
-
-Expected: `lib/router.gr.dart` updated, `EvmGrantsRoute` now available, no errors.
-
-- [ ] **Step 4: Full project verify**
-
-```sh
-cd useragent && flutter analyze
-```
-
-Expected: no issues.
-
-- [ ] **Step 5: Commit**
-
-```sh
-jj describe -m "feat(nav): add Grants dashboard tab"
-jj new
-```

docs/superpowers/specs/2026-03-28-grant-grid-view-design.md

@@ -1,170 +0,0 @@
-# Grant Grid View — Design Spec
-
-**Date:** 2026-03-28
-
-## Overview
-
-Add a "Grants" dashboard tab to the Flutter user-agent app that displays all EVM grants as a card-based grid. Each card shows a compact summary (type, chain, wallet address, client name) with a revoke action. The tab integrates into the existing `AdaptiveScaffold` navigation alongside Wallets, Clients, and About.
-
-## Scope
-
-- New `walletAccessListProvider` for fetching wallet access entries with their DB row IDs
-- New `EvmGrantsScreen` as a dashboard tab
-- Grant card widget with enriched display (type, chain, wallet, client)
-- Revoke action wired to existing `executeRevokeEvmGrant` mutation
-- Dashboard tab bar and router updated
-- New token-transfer accent color added to `Palette`
-
-**Out of scope:** Fixing grant creation (separate task).
-
----
-
-## Data Layer
-
-### `walletAccessListProvider`
-
-**File:** `useragent/lib/providers/sdk_clients/wallet_access_list.dart`
-
-- `@riverpod` class, watches `connectionManagerProvider.future`
-- Returns `List<SdkClientWalletAccess>?` (null when not connected)
-- Each entry: `.id` (wallet_access_id), `.access.walletId`, `.access.sdkClientId`
-- Exposes a `refresh()` method following the same pattern as `EvmGrants.refresh()`
-
-### Enrichment at render time (Approach A)
-
-The `EvmGrantsScreen` watches four providers:
-1. `evmGrantsProvider` — the grant list
-2. `walletAccessListProvider` — to resolve wallet_access_id → (wallet_id, sdk_client_id)
-3. `evmProvider` — to resolve wallet_id → wallet address
-4. `sdkClientsProvider` — to resolve sdk_client_id → client name
-
-All lookups are in-memory Maps built inside the build method; no extra model class needed.
-
-Fallbacks:
-- Wallet address not found → `"Access #N"` where N is the wallet_access_id
-- Client name not found → `"Client #N"` where N is the sdk_client_id
-
----
-
-## Route Structure
-
-```
-/dashboard
-  /evm          ← existing (Wallets tab)
-  /clients      ← existing (Clients tab)
-  /grants       ← NEW (Grants tab)
-  /about        ← existing
-
-/evm-grants/create  ← existing push route (unchanged)
-```
-
-### Changes to `router.dart`
-
-Add inside dashboard children:
-```dart
-AutoRoute(page: EvmGrantsRoute.page, path: 'grants'),
-```
-
-### Changes to `dashboard.dart`
-
-Add to `routes` list:
-```dart
-const EvmGrantsRoute()
-```
-
-Add `NavigationDestination`:
-```dart
-NavigationDestination(
-  icon: Icon(Icons.policy_outlined),
-  selectedIcon: Icon(Icons.policy),
-  label: 'Grants',
-),
-```
-
----
-
-## Screen: `EvmGrantsScreen`
-
-**File:** `useragent/lib/screens/dashboard/evm/grants/grants.dart`
-
-```
-Scaffold
-└─ SafeArea
-   └─ RefreshIndicator.adaptive (refreshes evmGrantsProvider + walletAccessListProvider)
-      └─ ListView (BouncingScrollPhysics + AlwaysScrollableScrollPhysics)
-         ├─ PageHeader
-         │    title: 'EVM Grants'
-         │    isBusy: evmGrantsProvider.isLoading
-         │    actions: [CreateGrantButton, RefreshButton]
-         ├─ SizedBox(height: 1.8.h)
-         └─ <content>
-```
-
-### State handling
-
-Matches the pattern from `EvmScreen` and `ClientsScreen`:
-
-| State | Display |
-|---|---|
-| Loading (no data yet) | `_StatePanel` with spinner, "Loading grants" |
-| Error | `_StatePanel` with coral icon, error message, Retry button |
-| No connection | `_StatePanel`, "No active server connection" |
-| Empty list | `_StatePanel`, "No grants yet", with Create Grant shortcut |
-| Data | Column of `_GrantCard` widgets |
-
-### Header actions
-
-**CreateGrantButton:** `FilledButton.icon` with `Icons.add_rounded`, pushes `CreateEvmGrantRoute()` via `context.router.push(...)`.
-
-**RefreshButton:** `OutlinedButton.icon` with `Icons.refresh`, calls `ref.read(evmGrantsProvider.notifier).refresh()`.
-
----
-
-## Grant Card: `_GrantCard`
-
-**Layout:**
-
-```
-Container (rounded 24, Palette.cream bg, Palette.line border)
-└─ IntrinsicHeight > Row
-   ├─ Accent strip (0.8.w wide, full height, rounded left)
-   └─ Padding > Column
-        ├─ Row 1: TypeBadge + ChainChip + Spacer + RevokeButton
-        └─ Row 2: WalletText + "·" + ClientText
-```
-
-**Accent color by grant type:**
-- Ether transfer → `Palette.coral`
-- Token transfer → `Palette.token` (new entry in `Palette` — indigo, e.g. `Color(0xFF5C6BC0)`)
-
-**TypeBadge:** Small pill container with accent color background at 15% opacity, accent-colored text. Label: `'Ether'` or `'Token'`.
-
-**ChainChip:** Small container: `'Chain ${grant.shared.chainId}'`, muted ink color.
-
-**WalletText:** Short hex address (`0xabc...def`) from wallet lookup, `bodySmall`, monospace font family.
-
-**ClientText:** Client name from `sdkClientsProvider` lookup, or fallback string. `bodySmall`, muted ink.
-
-**RevokeButton:**
-- `OutlinedButton` with `Icons.block_rounded` icon, label `'Revoke'`
-- `foregroundColor: Palette.coral`, `side: BorderSide(color: Palette.coral.withValues(alpha: 0.4))`
-- Disabled (replaced with `CircularProgressIndicator`) while `revokeEvmGrantMutation` is pending — note: this is a single global mutation, so all revoke buttons disable while any revoke is in flight
-- On press: calls `executeRevokeEvmGrant(ref, grantId: grant.id)`; shows `SnackBar` on error
-
----
-
-## Adaptive Sizing
-
-All sizing uses `sizer` units (`1.h`, `1.w`, etc.). No hardcoded pixel values.
-
----
-
-## Files to Create / Modify
-
-| File | Action |
-|---|---|
-| `lib/theme/palette.dart` | Modify — add `Palette.token` color |
-| `lib/providers/sdk_clients/wallet_access_list.dart` | Create |
-| `lib/screens/dashboard/evm/grants/grants.dart` | Create |
-| `lib/router.dart` | Modify — add grants route to dashboard children |
-| `lib/screens/dashboard.dart` | Modify — add tab to routes list and NavigationDestinations |

mise.lock

@@ -8,18 +8,10 @@ backend = "aqua:ast-grep/ast-grep"
 checksum = "sha256:5c830eae8456569e2f7212434ed9c238f58dca412d76045418ed6d394a755836"
 url = "https://github.com/ast-grep/ast-grep/releases/download/0.42.0/app-aarch64-unknown-linux-gnu.zip"
 
-[tools.ast-grep."platforms.linux-arm64-musl"]
-checksum = "sha256:5c830eae8456569e2f7212434ed9c238f58dca412d76045418ed6d394a755836"
-url = "https://github.com/ast-grep/ast-grep/releases/download/0.42.0/app-aarch64-unknown-linux-gnu.zip"
-
 [tools.ast-grep."platforms.linux-x64"]
 checksum = "sha256:e825a05603f0bcc4cd9076c4cc8c9abd6d008b7cd07d9aa3cc323ba4b8606651"
 url = "https://github.com/ast-grep/ast-grep/releases/download/0.42.0/app-x86_64-unknown-linux-gnu.zip"
 
-[tools.ast-grep."platforms.linux-x64-musl"]
-checksum = "sha256:e825a05603f0bcc4cd9076c4cc8c9abd6d008b7cd07d9aa3cc323ba4b8606651"
-url = "https://github.com/ast-grep/ast-grep/releases/download/0.42.0/app-x86_64-unknown-linux-gnu.zip"
-
 [tools.ast-grep."platforms.macos-arm64"]
 checksum = "sha256:fc300d5293b1c770a5aece03a8a193b92e71e87cec726c28096990691a582620"
 url = "https://github.com/ast-grep/ast-grep/releases/download/0.42.0/app-aarch64-apple-darwin.zip"
@@ -40,6 +32,10 @@ backend = "cargo:cargo-audit"
 version = "0.13.9"
 backend = "cargo:cargo-edit"
 
+[[tools."cargo:cargo-features"]]
+version = "1.0.0"
+backend = "cargo:cargo-features"
+
 [[tools."cargo:cargo-features-manager"]]
 version = "0.11.1"
 backend = "cargo:cargo-features-manager"
@@ -48,22 +44,26 @@ backend = "cargo:cargo-features-manager"
 version = "1.46.3"
 backend = "cargo:cargo-insta"
 
-[[tools."cargo:cargo-mutants"]]
-version = "27.0.0"
-backend = "cargo:cargo-mutants"
-
 [[tools."cargo:cargo-nextest"]]
 version = "0.9.126"
 backend = "cargo:cargo-nextest"
 
 [[tools."cargo:cargo-shear"]]
-version = "1.11.2"
+version = "1.9.1"
 backend = "cargo:cargo-shear"
 
 [[tools."cargo:cargo-vet"]]
 version = "0.10.2"
 backend = "cargo:cargo-vet"
 
+[[tools."cargo:diesel-cli"]]
+version = "2.3.6"
+backend = "cargo:diesel-cli"
+
+[tools."cargo:diesel-cli".options]
+default-features = "false"
+features = "sqlite,sqlite-bundled"
+
 [[tools."cargo:diesel_cli"]]
 version = "2.3.6"
 backend = "cargo:diesel_cli"
@@ -72,6 +72,10 @@ backend = "cargo:diesel_cli"
 default-features = "false"
 features = "sqlite,sqlite-bundled"
 
+[[tools."cargo:rinf_cli"]]
+version = "8.9.1"
+backend = "cargo:rinf_cli"
+
 [[tools.flutter]]
 version = "3.38.9-stable"
 backend = "asdf:flutter"
@@ -84,18 +88,10 @@ backend = "aqua:protocolbuffers/protobuf/protoc"
 checksum = "sha256:2594ff4fcae8cb57310d394d0961b236190ad9c5efbfdf1f597ea471d424fe79"
 url = "https://github.com/protocolbuffers/protobuf/releases/download/v29.6/protoc-29.6-linux-aarch_64.zip"
 
-[tools.protoc."platforms.linux-arm64-musl"]
-checksum = "sha256:2594ff4fcae8cb57310d394d0961b236190ad9c5efbfdf1f597ea471d424fe79"
-url = "https://github.com/protocolbuffers/protobuf/releases/download/v29.6/protoc-29.6-linux-aarch_64.zip"
-
 [tools.protoc."platforms.linux-x64"]
 checksum = "sha256:48785a926e73ffa3f68e2f22b14e7b849620c7a1d36809ac9249a5495e280323"
 url = "https://github.com/protocolbuffers/protobuf/releases/download/v29.6/protoc-29.6-linux-x86_64.zip"
 
-[tools.protoc."platforms.linux-x64-musl"]
-checksum = "sha256:48785a926e73ffa3f68e2f22b14e7b849620c7a1d36809ac9249a5495e280323"
-url = "https://github.com/protocolbuffers/protobuf/releases/download/v29.6/protoc-29.6-linux-x86_64.zip"
-
 [tools.protoc."platforms.macos-arm64"]
 checksum = "sha256:b9576b5fa1a1ef3fe13a8c91d9d8204b46545759bea5ae155cd6ba2ea4cdaeed"
 url = "https://github.com/protocolbuffers/protobuf/releases/download/v29.6/protoc-29.6-osx-aarch_64.zip"
@@ -113,39 +109,24 @@ version = "3.14.3"
 backend = "core:python"
 
 [tools.python."platforms.linux-arm64"]
-checksum = "sha256:53700338695e402a1a1fe22be4a41fbdacc70e22bb308a48eca8ed67cb7992be"
+checksum = "sha256:be0f4dc2932f762292b27d46ea7d3e8e66ddf3969a5eb0254a229015ed402625"
-url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260324/cpython-3.14.3+20260324-aarch64-unknown-linux-gnu-install_only_stripped.tar.gz"
+url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260303/cpython-3.14.3+20260303-aarch64-unknown-linux-gnu-install_only_stripped.tar.gz"
-provenance = "github-attestations"
-
-[tools.python."platforms.linux-arm64-musl"]
-checksum = "sha256:53700338695e402a1a1fe22be4a41fbdacc70e22bb308a48eca8ed67cb7992be"
-url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260324/cpython-3.14.3+20260324-aarch64-unknown-linux-gnu-install_only_stripped.tar.gz"
-provenance = "github-attestations"
 
 [tools.python."platforms.linux-x64"]
-checksum = "sha256:d7a9f970914bb4c88756fe3bdcc186d4feb90e9500e54f1db47dae4dc9687e39"
+checksum = "sha256:0a73413f89efd417871876c9accaab28a9d1e3cd6358fbfff171a38ec99302f0"
-url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260324/cpython-3.14.3+20260324-x86_64-unknown-linux-gnu-install_only_stripped.tar.gz"
+url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260303/cpython-3.14.3+20260303-x86_64-unknown-linux-gnu-install_only_stripped.tar.gz"
-provenance = "github-attestations"
-
-[tools.python."platforms.linux-x64-musl"]
-checksum = "sha256:d7a9f970914bb4c88756fe3bdcc186d4feb90e9500e54f1db47dae4dc9687e39"
-url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260324/cpython-3.14.3+20260324-x86_64-unknown-linux-gnu-install_only_stripped.tar.gz"
-provenance = "github-attestations"
 
 [tools.python."platforms.macos-arm64"]
-checksum = "sha256:c43aecde4a663aebff99b9b83da0efec506479f1c3f98331442f33d2c43501f9"
+checksum = "sha256:4703cdf18b26798fde7b49b6b66149674c25f97127be6a10dbcf29309bdcdcdb"
-url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260324/cpython-3.14.3+20260324-aarch64-apple-darwin-install_only_stripped.tar.gz"
+url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260303/cpython-3.14.3+20260303-aarch64-apple-darwin-install_only_stripped.tar.gz"
-provenance = "github-attestations"
 
 [tools.python."platforms.macos-x64"]
-checksum = "sha256:9ab41dbc2f100a2a45d1833b9c11165f51051c558b5213eda9a9731d5948a0c0"
+checksum = "sha256:76f1cc26e3d262eae8ca546a93e8bded10cf0323613f7e246fea2e10a8115eb7"
-url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260324/cpython-3.14.3+20260324-x86_64-apple-darwin-install_only_stripped.tar.gz"
+url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260303/cpython-3.14.3+20260303-x86_64-apple-darwin-install_only_stripped.tar.gz"
-provenance = "github-attestations"
 
 [tools.python."platforms.windows-x64"]
-checksum = "sha256:bbe19034b35b0267176a7442575ae7dc6343480fd4d35598cb7700173d431e09"
+checksum = "sha256:950c5f21a015c1bdd1337f233456df2470fab71e4d794407d27a84cb8b9909a0"
-url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260324/cpython-3.14.3+20260324-x86_64-pc-windows-msvc-install_only_stripped.tar.gz"
+url = "https://github.com/astral-sh/python-build-standalone/releases/download/20260303/cpython-3.14.3+20260303-x86_64-pc-windows-msvc-install_only_stripped.tar.gz"
-provenance = "github-attestations"
 
 [[tools.rust]]
 version = "1.93.0"

mise.toml

@@ -12,12 +12,11 @@ protoc = "29.6"
 python = "3.14.3"
 ast-grep = "0.42.0"
 "cargo:cargo-edit" = "0.13.9"
-"cargo:cargo-mutants" = "27.0.0"
 
 [tasks.codegen]
-sources = ['protobufs/*.proto', 'protobufs/**/*.proto']
+sources = ['protobufs/*.proto']
-outputs = ['useragent/lib/proto/**']
+outputs = ['useragent/lib/proto/*']
 run = '''
 dart pub global activate protoc_plugin && \
-protoc --dart_out=grpc:useragent/lib/proto --proto_path=protobufs/ $(find protobufs -name '*.proto' | sort)
+protoc --dart_out=grpc:useragent/lib/proto --proto_path=protobufs/ protobufs/*.proto
 '''

protobufs/client.proto

@@ -2,24 +2,56 @@ syntax = "proto3";
 
 package arbiter.client;
 
-import "client/auth.proto";
+import "evm.proto";
-import "client/evm.proto";
+import "google/protobuf/empty.proto";
-import "client/vault.proto";
+
+message AuthChallengeRequest {
+  bytes pubkey = 1;
+}
+
+message AuthChallenge {
+  bytes pubkey = 1;
+  int32 nonce = 2;
+}
+
+message AuthChallengeSolution {
+  bytes signature = 1;
+}
+
+enum AuthResult {
+  AUTH_RESULT_UNSPECIFIED = 0;
+  AUTH_RESULT_SUCCESS = 1;
+  AUTH_RESULT_INVALID_KEY = 2;
+  AUTH_RESULT_INVALID_SIGNATURE = 3;
+  AUTH_RESULT_APPROVAL_DENIED = 4;
+  AUTH_RESULT_NO_USER_AGENTS_ONLINE = 5;
+  AUTH_RESULT_INTERNAL = 6;
+}
+
+enum VaultState {
+  VAULT_STATE_UNSPECIFIED = 0;
+  VAULT_STATE_UNBOOTSTRAPPED = 1;
+  VAULT_STATE_SEALED = 2;
+  VAULT_STATE_UNSEALED = 3;
+  VAULT_STATE_ERROR = 4;
+}
 
 message ClientRequest {
   int32 request_id = 4;
   oneof payload {
-    auth.Request auth = 1;
+    AuthChallengeRequest auth_challenge_request = 1;
-    vault.Request vault = 2;
+    AuthChallengeSolution auth_challenge_solution = 2;
-    evm.Request evm = 3;
+    google.protobuf.Empty query_vault_state = 3;
   }
 }
 
 message ClientResponse {
   optional int32 request_id = 7;
   oneof payload {
-    auth.Response auth = 1;
+    AuthChallenge auth_challenge = 1;
-    vault.Response vault = 2;
+    AuthResult auth_result = 2;
-    evm.Response evm = 3;
+    arbiter.evm.EvmSignTransactionResponse evm_sign_transaction = 3;
+    arbiter.evm.EvmAnalyzeTransactionResponse evm_analyze_transaction = 4;
+    VaultState vault_state = 6;
   }
 }

protobufs/client/auth.proto

@@ -1,43 +0,0 @@
-syntax = "proto3";
-
-package arbiter.client.auth;
-
-import "shared/client.proto";
-
-message AuthChallengeRequest {
-  bytes pubkey = 1;
-  arbiter.shared.ClientInfo client_info = 2;
-}
-
-message AuthChallenge {
-  bytes pubkey = 1;
-  int32 nonce = 2;
-}
-
-message AuthChallengeSolution {
-  bytes signature = 1;
-}
-
-enum AuthResult {
-  AUTH_RESULT_UNSPECIFIED = 0;
-  AUTH_RESULT_SUCCESS = 1;
-  AUTH_RESULT_INVALID_KEY = 2;
-  AUTH_RESULT_INVALID_SIGNATURE = 3;
-  AUTH_RESULT_APPROVAL_DENIED = 4;
-  AUTH_RESULT_NO_USER_AGENTS_ONLINE = 5;
-  AUTH_RESULT_INTERNAL = 6;
-}
-
-message Request {
-  oneof payload {
-    AuthChallengeRequest challenge_request = 1;
-    AuthChallengeSolution challenge_solution = 2;
-  }
-}
-
-message Response {
-  oneof payload {
-    AuthChallenge challenge = 1;
-    AuthResult result = 2;
-  }
-}

protobufs/client/evm.proto

@@ -1,19 +0,0 @@
-syntax = "proto3";
-
-package arbiter.client.evm;
-
-import "evm.proto";
-
-message Request {
-  oneof payload {
-    arbiter.evm.EvmSignTransactionRequest sign_transaction = 1;
-    arbiter.evm.EvmAnalyzeTransactionRequest analyze_transaction = 2;
-  }
-}
-
-message Response {
-  oneof payload {
-    arbiter.evm.EvmSignTransactionResponse sign_transaction = 1;
-    arbiter.evm.EvmAnalyzeTransactionResponse analyze_transaction = 2;
-  }
-}

protobufs/client/vault.proto

@@ -1,18 +0,0 @@
-syntax = "proto3";
-
-package arbiter.client.vault;
-
-import "google/protobuf/empty.proto";
-import "shared/vault.proto";
-
-message Request {
-  oneof payload {
-    google.protobuf.Empty query_state = 1;
-  }
-}
-
-message Response {
-  oneof payload {
-    arbiter.shared.VaultState state = 1;
-  }
-}

protobufs/evm.proto

@@ -4,7 +4,6 @@ package arbiter.evm;
 
 import "google/protobuf/empty.proto";
 import "google/protobuf/timestamp.proto";
-import "shared/evm.proto";
 
 enum EvmError {
   EVM_ERROR_UNSPECIFIED = 0;
@@ -13,8 +12,7 @@ enum EvmError {
 }
 
 message WalletEntry {
-  int32 id = 1;
+  bytes address = 1; // 20-byte Ethereum address
-  bytes address = 2; // 20-byte Ethereum address
 }
 
 message WalletList {
@@ -48,7 +46,7 @@ message VolumeRateLimit {
 }
 
 message SharedSettings {
-  int32 wallet_access_id = 1;
+  int32 wallet_id = 1;
   uint64 chain_id = 2;
   optional google.protobuf.Timestamp valid_from = 3;
   optional google.protobuf.Timestamp valid_until = 4;
@@ -75,10 +73,75 @@ message SpecificGrant {
   }
 }
 
+message EtherTransferMeaning {
+  bytes to = 1; // 20-byte Ethereum address
+  bytes value = 2; // U256 as big-endian bytes
+}
+
+message TokenInfo {
+  string symbol = 1;
+  bytes address = 2; // 20-byte Ethereum address
+  uint64 chain_id = 3;
+}
+
+// Mirror of token_transfers::Meaning
+message TokenTransferMeaning {
+  TokenInfo token = 1;
+  bytes to = 2; // 20-byte Ethereum address
+  bytes value = 3; // U256 as big-endian bytes
+}
+
+// Mirror of policies::SpecificMeaning
+message SpecificMeaning {
+  oneof meaning {
+    EtherTransferMeaning ether_transfer = 1;
+    TokenTransferMeaning token_transfer = 2;
+  }
+}
+
+// --- Eval error types ---
+message GasLimitExceededViolation {
+  optional bytes max_gas_fee_per_gas = 1; // U256 as big-endian bytes
+  optional bytes max_priority_fee_per_gas = 2; // U256 as big-endian bytes
+}
+
+message EvalViolation {
+  oneof kind {
+    bytes invalid_target = 1; // 20-byte Ethereum address
+    GasLimitExceededViolation gas_limit_exceeded = 2;
+    google.protobuf.Empty rate_limit_exceeded = 3;
+    google.protobuf.Empty volumetric_limit_exceeded = 4;
+    google.protobuf.Empty invalid_time = 5;
+    google.protobuf.Empty invalid_transaction_type = 6;
+  }
+}
+
+// Transaction was classified but no grant covers it
+message NoMatchingGrantError {
+  SpecificMeaning meaning = 1;
+}
+
+// Transaction was classified and a grant was found, but constraints were violated
+message PolicyViolationsError {
+  SpecificMeaning meaning = 1;
+  repeated EvalViolation violations = 2;
+}
+
+// top-level error returned when transaction evaluation fails
+message TransactionEvalError {
+  oneof kind {
+    google.protobuf.Empty contract_creation_not_supported = 1;
+    google.protobuf.Empty unsupported_transaction_type = 2;
+    NoMatchingGrantError no_matching_grant = 3;
+    PolicyViolationsError policy_violations = 4;
+  }
+}
+
 // --- UserAgent grant management ---
 message EvmGrantCreateRequest {
-  SharedSettings shared = 1;
+  int32 client_id = 1;
-  SpecificGrant specific = 2;
+  SharedSettings shared = 2;
+  SpecificGrant specific = 3;
 }
 
 message EvmGrantCreateResponse {
@@ -102,13 +165,13 @@ message EvmGrantDeleteResponse {
 // Basic grant info returned in grant listings
 message GrantEntry {
   int32 id = 1;
-  int32 wallet_access_id = 2;
+  int32 client_id = 2;
   SharedSettings shared = 3;
   SpecificGrant specific = 4;
 }
 
 message EvmGrantListRequest {
-  optional int32 wallet_access_id = 1;
+  optional int32 wallet_id = 1;
 }
 
 message EvmGrantListResponse {
@@ -134,7 +197,7 @@ message EvmSignTransactionRequest {
 message EvmSignTransactionResponse {
   oneof result {
     bytes signature = 1; // 65-byte signature: r[32] || s[32] || v[1]
-    arbiter.shared.evm.TransactionEvalError eval_error = 2;
+    TransactionEvalError eval_error = 2;
     EvmError error = 3;
   }
 }
@@ -146,8 +209,8 @@ message EvmAnalyzeTransactionRequest {
 
 message EvmAnalyzeTransactionResponse {
   oneof result {
-    arbiter.shared.evm.SpecificMeaning meaning = 1;
+    SpecificMeaning meaning = 1;
-    arbiter.shared.evm.TransactionEvalError eval_error = 2;
+    TransactionEvalError eval_error = 2;
     EvmError error = 3;
   }
 }

protobufs/shared/client.proto

@@ -1,9 +0,0 @@
-syntax = "proto3";
-
-package arbiter.shared;
-
-message ClientInfo {
-  string name = 1;
-  optional string description = 2;
-  optional string version = 3;
-}

protobufs/shared/evm.proto

@@ -1,74 +0,0 @@
-syntax = "proto3";
-
-package arbiter.shared.evm;
-
-import "google/protobuf/empty.proto";
-
-message EtherTransferMeaning {
-  bytes to = 1; // 20-byte Ethereum address
-  bytes value = 2; // U256 as big-endian bytes
-}
-
-message TokenInfo {
-  string symbol = 1;
-  bytes address = 2; // 20-byte Ethereum address
-  uint64 chain_id = 3;
-}
-
-// Mirror of token_transfers::Meaning
-message TokenTransferMeaning {
-  TokenInfo token = 1;
-  bytes to = 2; // 20-byte Ethereum address
-  bytes value = 3; // U256 as big-endian bytes
-}
-
-// Mirror of policies::SpecificMeaning
-message SpecificMeaning {
-  oneof meaning {
-    EtherTransferMeaning ether_transfer = 1;
-    TokenTransferMeaning token_transfer = 2;
-  }
-}
-
-message GasLimitExceededViolation {
-  optional bytes max_gas_fee_per_gas = 1; // U256 as big-endian bytes
-  optional bytes max_priority_fee_per_gas = 2; // U256 as big-endian bytes
-}
-
-message EvalViolation {
-  message ChainIdMismatch {
-    uint64 expected = 1;
-    uint64 actual = 2;
-  }
-  oneof kind {
-    bytes invalid_target = 1; // 20-byte Ethereum address
-    GasLimitExceededViolation gas_limit_exceeded = 2;
-    google.protobuf.Empty rate_limit_exceeded = 3;
-    google.protobuf.Empty volumetric_limit_exceeded = 4;
-    google.protobuf.Empty invalid_time = 5;
-    google.protobuf.Empty invalid_transaction_type = 6;
-
-    ChainIdMismatch chain_id_mismatch = 7;
-  }
-}
-
-// Transaction was classified but no grant covers it
-message NoMatchingGrantError {
-  SpecificMeaning meaning = 1;
-}
-
-// Transaction was classified and a grant was found, but constraints were violated
-message PolicyViolationsError {
-  SpecificMeaning meaning = 1;
-  repeated EvalViolation violations = 2;
-}
-
-// top-level error returned when transaction evaluation fails
-message TransactionEvalError {
-  oneof kind {
-    google.protobuf.Empty contract_creation_not_supported = 1;
-    google.protobuf.Empty unsupported_transaction_type = 2;
-    NoMatchingGrantError no_matching_grant = 3;
-    PolicyViolationsError policy_violations = 4;
-  }
-}

protobufs/shared/vault.proto

@@ -1,11 +0,0 @@
-syntax = "proto3";
-
-package arbiter.shared;
-
-enum VaultState {
-  VAULT_STATE_UNSPECIFIED = 0;
-  VAULT_STATE_UNBOOTSTRAPPED = 1;
-  VAULT_STATE_SEALED = 2;
-  VAULT_STATE_UNSEALED = 3;
-  VAULT_STATE_ERROR = 4;
-}

protobufs/user_agent.proto

@@ -2,27 +2,178 @@ syntax = "proto3";
 
 package arbiter.user_agent;
 
-import "user_agent/auth.proto";
+import "evm.proto";
-import "user_agent/evm.proto";
+import "google/protobuf/empty.proto";
-import "user_agent/sdk_client.proto";
+
-import "user_agent/vault/vault.proto";
+enum KeyType {
+  KEY_TYPE_UNSPECIFIED = 0;
+  KEY_TYPE_ED25519 = 1;
+  KEY_TYPE_ECDSA_SECP256K1 = 2;
+  KEY_TYPE_RSA = 3;
+}
+
+// --- SDK client management ---
+
+enum SdkClientError {
+  SDK_CLIENT_ERROR_UNSPECIFIED = 0;
+  SDK_CLIENT_ERROR_ALREADY_EXISTS = 1;
+  SDK_CLIENT_ERROR_NOT_FOUND = 2;
+  SDK_CLIENT_ERROR_HAS_RELATED_DATA = 3; // hard-delete blocked by FK (client has grants or transaction logs)
+  SDK_CLIENT_ERROR_INTERNAL = 4;
+}
+
+message SdkClientApproveRequest {
+  bytes pubkey = 1; // 32-byte ed25519 public key
+}
+
+message SdkClientRevokeRequest {
+  int32 client_id = 1;
+}
+
+message SdkClientEntry {
+  int32 id = 1;
+  bytes pubkey = 2;
+  int32 created_at = 3;
+}
+
+message SdkClientList {
+  repeated SdkClientEntry clients = 1;
+}
+
+message SdkClientApproveResponse {
+  oneof result {
+    SdkClientEntry client = 1;
+    SdkClientError error = 2;
+  }
+}
+
+message SdkClientRevokeResponse {
+  oneof result {
+    google.protobuf.Empty ok = 1;
+    SdkClientError error = 2;
+  }
+}
+
+message SdkClientListResponse {
+  oneof result {
+    SdkClientList clients = 1;
+    SdkClientError error = 2;
+  }
+}
+
+message AuthChallengeRequest {
+  bytes pubkey = 1;
+  optional string bootstrap_token = 2;
+  KeyType key_type = 3;
+}
+
+message AuthChallenge {
+  int32 nonce = 2;
+  reserved 1;
+}
+
+message AuthChallengeSolution {
+  bytes signature = 1;
+}
+
+enum AuthResult {
+  AUTH_RESULT_UNSPECIFIED = 0;
+  AUTH_RESULT_SUCCESS = 1;
+  AUTH_RESULT_INVALID_KEY = 2;
+  AUTH_RESULT_INVALID_SIGNATURE = 3;
+  AUTH_RESULT_BOOTSTRAP_REQUIRED = 4;
+  AUTH_RESULT_TOKEN_INVALID = 5;
+  AUTH_RESULT_INTERNAL = 6;
+}
+
+message UnsealStart {
+  bytes client_pubkey = 1;
+}
+
+message UnsealStartResponse {
+  bytes server_pubkey = 1;
+}
+message UnsealEncryptedKey {
+  bytes nonce = 1;
+  bytes ciphertext = 2;
+  bytes associated_data = 3;
+}
+
+message BootstrapEncryptedKey {
+  bytes nonce = 1;
+  bytes ciphertext = 2;
+  bytes associated_data = 3;
+}
+
+enum UnsealResult {
+  UNSEAL_RESULT_UNSPECIFIED = 0;
+  UNSEAL_RESULT_SUCCESS = 1;
+  UNSEAL_RESULT_INVALID_KEY = 2;
+  UNSEAL_RESULT_UNBOOTSTRAPPED = 3;
+}
+
+enum BootstrapResult {
+  BOOTSTRAP_RESULT_UNSPECIFIED = 0;
+  BOOTSTRAP_RESULT_SUCCESS = 1;
+  BOOTSTRAP_RESULT_ALREADY_BOOTSTRAPPED = 2;
+  BOOTSTRAP_RESULT_INVALID_KEY = 3;
+}
+
+enum VaultState {
+  VAULT_STATE_UNSPECIFIED = 0;
+  VAULT_STATE_UNBOOTSTRAPPED = 1;
+  VAULT_STATE_SEALED = 2;
+  VAULT_STATE_UNSEALED = 3;
+  VAULT_STATE_ERROR = 4;
+}
+
+message SdkClientConnectionRequest {
+  bytes pubkey = 1;
+}
+
+message SdkClientConnectionResponse {
+  bool approved = 1;
+}
+
+message SdkClientConnectionCancel {}
 
 message UserAgentRequest {
   int32 id = 16;
   oneof payload {
-    auth.Request auth = 1;
+    AuthChallengeRequest auth_challenge_request = 1;
-    vault.Request vault = 2;
+    AuthChallengeSolution auth_challenge_solution = 2;
-    evm.Request evm = 3;
+    UnsealStart unseal_start = 3;
-    sdk_client.Request sdk_client = 4;
+    UnsealEncryptedKey unseal_encrypted_key = 4;
+    google.protobuf.Empty query_vault_state = 5;
+    google.protobuf.Empty evm_wallet_create = 6;
+    google.protobuf.Empty evm_wallet_list = 7;
+    arbiter.evm.EvmGrantCreateRequest evm_grant_create = 8;
+    arbiter.evm.EvmGrantDeleteRequest evm_grant_delete = 9;
+    arbiter.evm.EvmGrantListRequest evm_grant_list = 10;
+    SdkClientConnectionResponse sdk_client_connection_response = 11;
+    SdkClientApproveRequest sdk_client_approve = 12;
+    SdkClientRevokeRequest sdk_client_revoke = 13;
+    google.protobuf.Empty sdk_client_list = 14;
+    BootstrapEncryptedKey bootstrap_encrypted_key = 15;
   }
 }
-
 message UserAgentResponse {
   optional int32 id = 16;
   oneof payload {
-    auth.Response auth = 1;
+    AuthChallenge auth_challenge = 1;
-    vault.Response vault = 2;
+    AuthResult auth_result = 2;
-    evm.Response evm = 3;
+    UnsealStartResponse unseal_start_response = 3;
-    sdk_client.Response sdk_client = 4;
+    UnsealResult unseal_result = 4;
+    VaultState vault_state = 5;
+    arbiter.evm.WalletCreateResponse evm_wallet_create = 6;
+    arbiter.evm.WalletListResponse evm_wallet_list = 7;
+    arbiter.evm.EvmGrantCreateResponse evm_grant_create = 8;
+    arbiter.evm.EvmGrantDeleteResponse evm_grant_delete = 9;
+    arbiter.evm.EvmGrantListResponse evm_grant_list = 10;
+    SdkClientConnectionResponse sdk_client_connection_response = 11;
+    SdkClientApproveResponse sdk_client_approve_response = 12;
+    SdkClientRevokeResponse sdk_client_revoke_response = 13;
+    SdkClientListResponse sdk_client_list_response = 14;
+    BootstrapResult bootstrap_result = 15;
   }
 }

protobufs/user_agent/auth.proto

@@ -1,48 +0,0 @@
-syntax = "proto3";
-
-package arbiter.user_agent.auth;
-
-enum KeyType {
-  KEY_TYPE_UNSPECIFIED = 0;
-  KEY_TYPE_ED25519 = 1;
-  KEY_TYPE_ECDSA_SECP256K1 = 2;
-  KEY_TYPE_RSA = 3;
-}
-
-message AuthChallengeRequest {
-  bytes pubkey = 1;
-  optional string bootstrap_token = 2;
-  KeyType key_type = 3;
-}
-
-message AuthChallenge {
-  int32 nonce = 1;
-}
-
-message AuthChallengeSolution {
-  bytes signature = 1;
-}
-
-enum AuthResult {
-  AUTH_RESULT_UNSPECIFIED = 0;
-  AUTH_RESULT_SUCCESS = 1;
-  AUTH_RESULT_INVALID_KEY = 2;
-  AUTH_RESULT_INVALID_SIGNATURE = 3;
-  AUTH_RESULT_BOOTSTRAP_REQUIRED = 4;
-  AUTH_RESULT_TOKEN_INVALID = 5;
-  AUTH_RESULT_INTERNAL = 6;
-}
-
-message Request {
-  oneof payload {
-    AuthChallengeRequest challenge_request = 1;
-    AuthChallengeSolution challenge_solution = 2;
-  }
-}
-
-message Response {
-  oneof payload {
-    AuthChallenge challenge = 1;
-    AuthResult result = 2;
-  }
-}

protobufs/user_agent/evm.proto

@@ -1,33 +0,0 @@
-syntax = "proto3";
-
-package arbiter.user_agent.evm;
-
-import "evm.proto";
-import "google/protobuf/empty.proto";
-
-message SignTransactionRequest {
-  int32 client_id = 1;
-  arbiter.evm.EvmSignTransactionRequest request = 2;
-}
-
-message Request {
-  oneof payload {
-    google.protobuf.Empty wallet_create = 1;
-    google.protobuf.Empty wallet_list = 2;
-    arbiter.evm.EvmGrantCreateRequest grant_create = 3;
-    arbiter.evm.EvmGrantDeleteRequest grant_delete = 4;
-    arbiter.evm.EvmGrantListRequest grant_list = 5;
-    SignTransactionRequest sign_transaction = 6;
-  }
-}
-
-message Response {
-  oneof payload {
-    arbiter.evm.WalletCreateResponse wallet_create = 1;
-    arbiter.evm.WalletListResponse wallet_list = 2;
-    arbiter.evm.EvmGrantCreateResponse grant_create = 3;
-    arbiter.evm.EvmGrantDeleteResponse grant_delete = 4;
-    arbiter.evm.EvmGrantListResponse grant_list = 5;
-    arbiter.evm.EvmSignTransactionResponse sign_transaction = 6;
-  }
-}

protobufs/user_agent/sdk_client.proto

@@ -1,100 +0,0 @@
-syntax = "proto3";
-
-package arbiter.user_agent.sdk_client;
-
-import "shared/client.proto";
-import "google/protobuf/empty.proto";
-
-enum Error {
-  ERROR_UNSPECIFIED = 0;
-  ERROR_ALREADY_EXISTS = 1;
-  ERROR_NOT_FOUND = 2;
-  ERROR_HAS_RELATED_DATA = 3; // hard-delete blocked by FK (client has grants or transaction logs)
-  ERROR_INTERNAL = 4;
-}
-
-message RevokeRequest {
-  int32 client_id = 1;
-}
-
-message Entry {
-  int32 id = 1;
-  bytes pubkey = 2;
-  arbiter.shared.ClientInfo info = 3;
-  int32 created_at = 4;
-}
-
-message List {
-  repeated Entry clients = 1;
-}
-
-message RevokeResponse {
-  oneof result {
-    google.protobuf.Empty ok = 1;
-    Error error = 2;
-  }
-}
-
-message ListResponse {
-  oneof result {
-    List clients = 1;
-    Error error = 2;
-  }
-}
-
-message ConnectionRequest {
-  bytes pubkey = 1;
-  arbiter.shared.ClientInfo info = 2;
-}
-
-message ConnectionResponse {
-  bool approved = 1;
-  bytes pubkey = 2;
-}
-
-message ConnectionCancel {
-  bytes pubkey = 1;
-}
-
-message WalletAccess {
-  int32 wallet_id = 1;
-  int32 sdk_client_id = 2;
-}
-
-message WalletAccessEntry {
-  int32 id = 1;
-  WalletAccess access = 2;
-}
-
-message GrantWalletAccess {
-  repeated WalletAccess accesses = 1;
-}
-
-message RevokeWalletAccess {
-  repeated int32 accesses = 1;
-}
-
-message ListWalletAccessResponse {
-  repeated WalletAccessEntry accesses = 1;
-}
-
-message Request {
-  oneof payload {
-    ConnectionResponse connection_response = 1;
-    RevokeRequest revoke = 2;
-    google.protobuf.Empty list = 3;
-    GrantWalletAccess grant_wallet_access = 4;
-    RevokeWalletAccess revoke_wallet_access = 5;
-    google.protobuf.Empty list_wallet_access = 6;
-  }
-}
-
-message Response {
-  oneof payload {
-    ConnectionRequest connection_request = 1;
-    ConnectionCancel connection_cancel = 2;
-    RevokeResponse revoke = 3;
-    ListResponse list = 4;
-    ListWalletAccessResponse list_wallet_access = 5;
-  }
-}

protobufs/user_agent/vault/bootstrap.proto

@@ -1,24 +0,0 @@
-syntax = "proto3";
-
-package arbiter.user_agent.vault.bootstrap;
-
-message BootstrapEncryptedKey {
-  bytes nonce = 1;
-  bytes ciphertext = 2;
-  bytes associated_data = 3;
-}
-
-enum BootstrapResult {
-  BOOTSTRAP_RESULT_UNSPECIFIED = 0;
-  BOOTSTRAP_RESULT_SUCCESS = 1;
-  BOOTSTRAP_RESULT_ALREADY_BOOTSTRAPPED = 2;
-  BOOTSTRAP_RESULT_INVALID_KEY = 3;
-}
-
-message Request {
-  BootstrapEncryptedKey encrypted_key = 2;
-}
-
-message Response {
-  BootstrapResult result = 1;
-}

protobufs/user_agent/vault/unseal.proto

@@ -1,37 +0,0 @@
-syntax = "proto3";
-
-package arbiter.user_agent.vault.unseal;
-
-message UnsealStart {
-  bytes client_pubkey = 1;
-}
-
-message UnsealStartResponse {
-  bytes server_pubkey = 1;
-}
-message UnsealEncryptedKey {
-  bytes nonce = 1;
-  bytes ciphertext = 2;
-  bytes associated_data = 3;
-}
-
-enum UnsealResult {
-  UNSEAL_RESULT_UNSPECIFIED = 0;
-  UNSEAL_RESULT_SUCCESS = 1;
-  UNSEAL_RESULT_INVALID_KEY = 2;
-  UNSEAL_RESULT_UNBOOTSTRAPPED = 3;
-}
-
-message Request {
-  oneof payload {
-    UnsealStart start = 1;
-    UnsealEncryptedKey encrypted_key = 2;
-  }
-}
-
-message Response {
-  oneof payload {
-    UnsealStartResponse start = 1;
-    UnsealResult result = 2;
-  }
-}

protobufs/user_agent/vault/vault.proto

@@ -1,24 +0,0 @@
-syntax = "proto3";
-
-package arbiter.user_agent.vault;
-
-import "google/protobuf/empty.proto";
-import "shared/vault.proto";
-import "user_agent/vault/bootstrap.proto";
-import "user_agent/vault/unseal.proto";
-
-message Request {
-  oneof payload {
-    google.protobuf.Empty query_state = 1;
-    unseal.Request unseal = 2;
-    bootstrap.Request bootstrap = 3;
-  }
-}
-
-message Response {
-  oneof payload {
-    arbiter.shared.VaultState state = 1;
-    unseal.Response unseal = 2;
-    bootstrap.Response bootstrap = 3;
-  }
-}

server/.cargo/mutants.toml

@@ -1 +0,0 @@
-test_tool = "nextest"

server/.gitignore

@@ -1,2 +0,0 @@
-mutants.out/
-mutants.out.old/

server/Cargo.lock

@@ -347,7 +347,7 @@ dependencies = [
  "ruint",
  "rustc-hash",
  "serde",
- "sha3 0.10.8",
+ "sha3",
 ]
 
 [[package]]
@@ -548,7 +548,7 @@ dependencies = [
  "proc-macro-error2",
  "proc-macro2",
  "quote",
- "sha3 0.10.8",
+ "sha3",
  "syn 2.0.117",
  "syn-solidity",
 ]
@@ -680,41 +680,19 @@ name = "arbiter-client"
 version = "0.1.0"
 dependencies = [
  "alloy",
- "arbiter-crypto",
  "arbiter-proto",
  "async-trait",
+ "ed25519-dalek",
  "http",
  "rand 0.10.0",
  "rustls-webpki",
+ "terrors",
  "thiserror 2.0.18",
  "tokio",
  "tokio-stream",
  "tonic",
 ]
 
-[[package]]
-name = "arbiter-crypto"
-version = "0.1.0"
-dependencies = [
- "alloy",
- "base64",
- "chrono",
- "hmac",
- "memsafe",
- "ml-dsa",
- "rand 0.10.0",
-]
-
-[[package]]
-name = "arbiter-macros"
-version = "0.1.0"
-dependencies = [
- "arbiter-crypto",
- "proc-macro2",
- "quote",
- "syn 2.0.117",
-]
-
 [[package]]
 name = "arbiter-proto"
 version = "0.1.0"
@@ -747,9 +725,6 @@ name = "arbiter-server"
 version = "0.1.0"
 dependencies = [
  "alloy",
- "anyhow",
- "arbiter-crypto",
- "arbiter-macros",
  "arbiter-proto",
  "arbiter-tokens-registry",
  "argon2",
@@ -763,28 +738,23 @@ dependencies = [
  "ed25519-dalek",
  "fatality",
  "futures",
- "hmac",
  "insta",
  "k256",
  "kameo",
- "ml-dsa",
+ "memsafe",
- "mutants",
+ "miette",
  "pem",
- "proptest",
- "prost",
  "prost-types",
  "rand 0.10.0",
  "rcgen",
  "restructed",
- "rstest",
+ "rsa",
  "rustls",
  "secrecy",
- "serde_with",
  "sha2 0.10.9",
  "smlang",
- "spki 0.7.3",
+ "spki",
  "strum 0.28.0",
- "subtle",
  "test-log",
  "thiserror 2.0.18",
  "tokio",
@@ -1473,12 +1443,6 @@ dependencies = [
  "cc",
 ]
 
-[[package]]
-name = "cmov"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3f88a43d011fc4a6876cb7344703e297c71dda42494fee094d5f7c76bf13f746"
-
 [[package]]
 name = "console"
 version = "0.15.11"
@@ -1509,12 +1473,6 @@ version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
-[[package]]
-name = "const-oid"
-version = "0.10.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a6ef517f0926dd24a1582492c791b6a4818a4d94e789a334894aa15b0d12f55c"
-
 [[package]]
 name = "const_format"
 version = "0.2.35"
@@ -1636,15 +1594,6 @@ dependencies = [
  "hybrid-array",
 ]
 
-[[package]]
-name = "ctutils"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7d5515a3834141de9eafb9717ad39eea8247b5674e6066c404e8c4b365d2a29e"
-dependencies = [
- "cmov",
-]
-
 [[package]]
 name = "curve25519-dalek"
 version = "4.1.3"
@@ -1783,17 +1732,8 @@ version = "0.7.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e7c1832837b905bbfb5101e07cc24c8deddf52f93225eee6ead5f4d63d53ddcb"
 dependencies = [
- "const-oid 0.9.6",
+ "const-oid",
- "zeroize",
+ "pem-rfc7468",
-]
-
-[[package]]
-name = "der"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71fd89660b2dc699704064e59e9dba0147b903e85319429e131620d022be411b"
-dependencies = [
- "const-oid 0.10.2",
  "zeroize",
 ]
 
@@ -1936,7 +1876,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
  "block-buffer 0.10.4",
- "const-oid 0.9.6",
+ "const-oid",
  "crypto-common 0.1.7",
  "subtle",
 ]
@@ -2000,13 +1940,13 @@ version = "0.16.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee27f32b5c5292967d2d4a9d7f1e0b0aed2c15daded5a60300e4abb9d8020bca"
 dependencies = [
- "der 0.7.10",
+ "der",
  "digest 0.10.7",
  "elliptic-curve",
  "rfc6979",
  "serdect",
  "signature 2.2.0",
- "spki 0.7.3",
+ "spki",
 ]
 
 [[package]]
@@ -2065,7 +2005,7 @@ dependencies = [
  "ff",
  "generic-array",
  "group",
- "pkcs8 0.10.2",
+ "pkcs8",
  "rand_core 0.6.4",
  "sec1",
  "serdect",
@@ -2112,7 +2052,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -2612,7 +2552,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8655f91cd07f2b9d0c24137bd650fe69617773435ee5ec83022377777ce65ef1"
 dependencies = [
  "typenum",
- "zeroize",
 ]
 
 [[package]]
@@ -3010,16 +2949,6 @@ dependencies = [
  "cpufeatures 0.2.17",
 ]
 
-[[package]]
-name = "keccak"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e24a010dd405bd7ed803e5253182815b41bf2e6a80cc3bfc066658e03a198aa"
-dependencies = [
- "cfg-if",
- "cpufeatures 0.3.0",
-]
-
 [[package]]
 name = "keccak-asm"
 version = "0.1.5"
@@ -3035,6 +2964,9 @@ name = "lazy_static"
 version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bbd2bcb4c963f2ddae06a2efc7e9f3591312473c50c6685e1f298068316e66fe"
+dependencies = [
+ "spin",
+]
 
 [[package]]
 name = "leb128fmt"
@@ -3233,46 +3165,12 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "ml-dsa"
-version = "0.1.0-rc.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5b2bb0ad6fa2b40396775bd56f51345171490fef993f46f91a876ecdbdaea55"
-dependencies = [
- "const-oid 0.10.2",
- "ctutils",
- "hybrid-array",
- "module-lattice",
- "pkcs8 0.11.0-rc.11",
- "rand_core 0.10.0",
- "sha3 0.11.0",
- "signature 3.0.0-rc.10",
- "zeroize",
-]
-
-[[package]]
-name = "module-lattice"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "164eb3faeaecbd14b0b2a917c1b4d0c035097a9c559b0bed85c2cdd032bc8faa"
-dependencies = [
- "hybrid-array",
- "num-traits",
- "zeroize",
-]
-
 [[package]]
 name = "multimap"
 version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d87ecb2933e8aeadb3e3a02b828fed80a7528047e68b4f424523a0981a3a084"
 
-[[package]]
-name = "mutants"
-version = "0.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "add0ac067452ff1aca8c5002111bd6b1c895baee6e45fcbc44e0193aea17be56"
-
 [[package]]
 name = "nom"
 version = "7.1.3"
@@ -3289,7 +3187,7 @@ version = "0.50.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
 dependencies = [
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -3302,6 +3200,22 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-bigint-dig"
+version = "0.8.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e661dda6640fad38e827a6d4a310ff4763082116fe217f279885c97f511bb0b7"
+dependencies = [
+ "lazy_static",
+ "libm",
+ "num-integer",
+ "num-iter",
+ "num-traits",
+ "rand 0.8.5",
+ "smallvec",
+ "zeroize",
+]
+
 [[package]]
 name = "num-conv"
 version = "0.2.0"
@@ -3317,6 +3231,17 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "num-iter"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1429034a0490724d0075ebb2bc9e875d6503c3cf69e235a8941aa757d83ef5bf"
+dependencies = [
+ "autocfg",
+ "num-integer",
+ "num-traits",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -3486,6 +3411,15 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "pem-rfc7468"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88b39c9bfcfc231068454382784bb460aae594343fb030d46e9f50a645418412"
+dependencies = [
+ "base64ct",
+]
+
 [[package]]
 name = "percent-encoding"
 version = "2.3.2"
@@ -3545,24 +3479,25 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "pkcs1"
+version = "0.7.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c8ffb9f10fa047879315e6625af03c164b16962a5368d724ed16323b68ace47f"
+dependencies = [
+ "der",
+ "pkcs8",
+ "spki",
+]
+
 [[package]]
 name = "pkcs8"
 version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f950b2377845cebe5cf8b5165cb3cc1a5e0fa5cfa3e1f7f55707d8fd82e0a7b7"
 dependencies = [
- "der 0.7.10",
+ "der",
- "spki 0.7.3",
+ "spki",
-]
-
-[[package]]
-name = "pkcs8"
-version = "0.11.0-rc.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12922b6296c06eb741b02d7b5161e3aaa22864af38dfa025a1a3ba3f68c84577"
-dependencies = [
- "der 0.8.0",
- "spki 0.8.0",
 ]
 
 [[package]]
@@ -3699,9 +3634,9 @@ dependencies = [
 
 [[package]]
 name = "proptest"
-version = "1.11.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b45fcc2344c680f5025fe57779faef368840d0bd1f42f216291f0dc4ace4744"
+checksum = "37566cb3fdacef14c0737f9546df7cfeadbfbc9fef10991038bf5015d0c80532"
 dependencies = [
  "bit-set",
  "bit-vec",
@@ -4202,6 +4137,27 @@ dependencies = [
  "rustc-hex",
 ]
 
+[[package]]
+name = "rsa"
+version = "0.9.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8573f03f5883dcaebdfcf4725caa1ecb9c15b2ef50c43a07b816e06799bb12d"
+dependencies = [
+ "const-oid",
+ "digest 0.10.7",
+ "num-bigint-dig",
+ "num-integer",
+ "num-traits",
+ "pkcs1",
+ "pkcs8",
+ "rand_core 0.6.4",
+ "sha2 0.10.9",
+ "signature 2.2.0",
+ "spki",
+ "subtle",
+ "zeroize",
+]
+
 [[package]]
 name = "rsqlite-vfs"
 version = "0.1.0"
@@ -4330,7 +4286,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4441,9 +4397,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3e97a565f76233a6003f9f5c54be1d9c5bdfa3eccfb189469f11ec4901c47dc"
 dependencies = [
  "base16ct",
- "der 0.7.10",
+ "der",
  "generic-array",
- "pkcs8 0.10.2",
+ "pkcs8",
  "serdect",
  "subtle",
  "zeroize",
@@ -4637,17 +4593,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "75872d278a8f37ef87fa0ddbda7802605cb18344497949862c0d4dcb291eba60"
 dependencies = [
  "digest 0.10.7",
- "keccak 0.1.6",
+ "keccak",
-]
-
-[[package]]
-name = "sha3"
-version = "0.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be176f1a57ce4e3d31c1a166222d9768de5954f811601fb7ca06fc8203905ce1"
-dependencies = [
- "digest 0.11.2",
- "keccak 0.2.0",
 ]
 
 [[package]]
@@ -4700,10 +4646,6 @@ name = "signature"
 version = "3.0.0-rc.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f1880df446116126965eeec169136b2e0251dba37c6223bcc819569550edea3"
-dependencies = [
- "digest 0.11.2",
- "rand_core 0.10.0",
-]
 
 [[package]]
 name = "simd-adler32"
@@ -4760,9 +4702,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3a766e1110788c36f4fa1c2b71b387a7815aa65f88ce0229841826633d93723e"
 dependencies = [
  "libc",
- "windows-sys 0.61.2",
+ "windows-sys 0.60.2",
 ]
 
+[[package]]
+name = "spin"
+version = "0.9.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
+
 [[package]]
 name = "spki"
 version = "0.7.3"
@@ -4770,17 +4718,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d91ed6c858b01f942cd56b37a94b3e0a1798290327d1236e4d9cf4eaca44d29d"
 dependencies = [
  "base64ct",
- "der 0.7.10",
+ "der",
-]
-
-[[package]]
-name = "spki"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d9efca8738c78ee9484207732f728b1ef517bbb1833d6fc0879ca898a522f6f"
-dependencies = [
- "base64ct",
- "der 0.8.0",
 ]
 
 [[package]]
@@ -4958,7 +4896,7 @@ dependencies = [
  "getrandom 0.4.2",
  "once_cell",
  "rustix",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4971,6 +4909,11 @@ dependencies = [
  "windows-sys 0.60.2",
 ]
 
+[[package]]
+name = "terrors"
+version = "0.5.1"
+source = "git+https://github.com/CleverWild/terrors#a0867fd9ca3fbb44c32e92113a917f1577b5716a"
+
 [[package]]
 name = "test-log"
 version = "0.2.19"

server/Cargo.toml

@@ -1,7 +1,5 @@
 [workspace]
-members = [
+members = ["crates/*"]
-    "crates/*",
-]
 resolver = "3"
 
 [workspace.lints.clippy]
@@ -20,8 +18,9 @@ tokio = { version = "1.50.0", features = ["full"] }
 ed25519-dalek = { version = "3.0.0-pre.6", features = ["rand_core"] }
 chrono = { version = "0.4.44", features = ["serde"] }
 rand = "0.10.0"
-rustls = { version = "0.23.37", features = ["aws-lc-rs", "logging", "prefer-post-quantum", "std"], default-features = false }
+rustls = { version = "0.23.37", features = ["aws-lc-rs"] }
 smlang = "0.8.0"
+miette = { version = "7.6.0", features = ["fancy", "serde"] }
 thiserror = "2.0.18"
 async-trait = "0.1.89"
 futures = "0.3.32"
@@ -42,9 +41,4 @@ k256 = { version = "0.13.4", features = ["ecdsa", "pkcs8"] }
 rsa = { version = "0.9", features = ["sha2"] }
 sha2 = "0.10"
 spki = "0.7"
-prost = "0.14.3"
+terrors = { version = "0.5", git = "https://github.com/CleverWild/terrors" }
-miette = { version = "7.6.0", features = ["fancy", "serde"] }
-mutants = "0.0.4"
-ml-dsa = { version = "0.1.0-rc.8", features = ["zeroize"] }
-base64 = "0.22.1"
-hmac = "0.12.1"

server/crates/arbiter-client/Cargo.toml

@@ -13,14 +13,15 @@ evm = ["dep:alloy"]
 
 [dependencies]
 arbiter-proto.path = "../arbiter-proto"
-arbiter-crypto.path = "../arbiter-crypto"
 alloy = { workspace = true, optional = true }
 tonic.workspace = true
 tonic.features = ["tls-aws-lc"]
 tokio.workspace = true
 tokio-stream.workspace = true
+ed25519-dalek.workspace = true
 thiserror.workspace = true
 http = "1.4.0"
 rustls-webpki = { version = "0.103.10", features = ["aws-lc-rs"] }
 async-trait.workspace = true
 rand.workspace = true
+terrors.workspace = true

server/crates/arbiter-client/src/auth.rs

@@ -1,151 +1,102 @@
-use arbiter_crypto::authn::{CLIENT_CONTEXT, SigningKey, format_challenge};
 use arbiter_proto::{
-    ClientMetadata,
+    format_challenge,
-    proto::{
+    proto::client::{
-        client::{
+        AuthChallengeRequest, AuthChallengeSolution, AuthResult, ClientRequest,
-            ClientRequest,
+        client_request::Payload as ClientRequestPayload,
-            auth::{
+        client_response::Payload as ClientResponsePayload,
-                self as proto_auth, AuthChallenge, AuthChallengeRequest, AuthChallengeSolution,
-                AuthResult, request::Payload as AuthRequestPayload,
-                response::Payload as AuthResponsePayload,
-            },
-            client_request::Payload as ClientRequestPayload,
-            client_response::Payload as ClientResponsePayload,
-        },
-        shared::ClientInfo as ProtoClientInfo,
     },
 };
+use ed25519_dalek::Signer as _;
+use terrors::OneOf;
 
 use crate::{
-    storage::StorageError,
+    errors::{
+        ConnectError, MissingAuthChallengeError, UnexpectedAuthResponseError, map_auth_code_error,
+    },
     transport::{ClientTransport, next_request_id},
 };
 
-#[derive(Debug, thiserror::Error)]
-pub enum AuthError {
-    #[error("Auth challenge was not returned by server")]
-    MissingAuthChallenge,
-
-    #[error("Client approval denied by User Agent")]
-    ApprovalDenied,
-
-    #[error("No User Agents online to approve client")]
-    NoUserAgentsOnline,
-
-    #[error("Unexpected auth response payload")]
-    UnexpectedAuthResponse,
-
-    #[error("Signing key storage error")]
-    Storage(#[from] StorageError),
-}
-
-fn map_auth_result(code: i32) -> AuthError {
-    match AuthResult::try_from(code).unwrap_or(AuthResult::Unspecified) {
-        AuthResult::ApprovalDenied => AuthError::ApprovalDenied,
-        AuthResult::NoUserAgentsOnline => AuthError::NoUserAgentsOnline,
-        AuthResult::Unspecified
-        | AuthResult::Success
-        | AuthResult::InvalidKey
-        | AuthResult::InvalidSignature
-        | AuthResult::Internal => AuthError::UnexpectedAuthResponse,
-    }
-}
-
 async fn send_auth_challenge_request(
     transport: &mut ClientTransport,
-    metadata: ClientMetadata,
+    key: &ed25519_dalek::SigningKey,
-    key: &SigningKey,
+) -> std::result::Result<(), ConnectError> {
-) -> std::result::Result<(), AuthError> {
     transport
         .send(ClientRequest {
             request_id: next_request_id(),
-            payload: Some(ClientRequestPayload::Auth(proto_auth::Request {
+            payload: Some(ClientRequestPayload::AuthChallengeRequest(
-                payload: Some(AuthRequestPayload::ChallengeRequest(AuthChallengeRequest {
+                AuthChallengeRequest {
-                    pubkey: key.public_key().to_bytes(),
+                    pubkey: key.verifying_key().to_bytes().to_vec(),
-                    client_info: Some(ProtoClientInfo {
+                },
-                        name: metadata.name,
+            )),
-                        description: metadata.description,
-                        version: metadata.version,
-                    }),
-                })),
-            })),
         })
         .await
-        .map_err(|_| AuthError::UnexpectedAuthResponse)
+        .map_err(|_| OneOf::new(UnexpectedAuthResponseError))
 }
 
 async fn receive_auth_challenge(
     transport: &mut ClientTransport,
-) -> std::result::Result<AuthChallenge, AuthError> {
+) -> std::result::Result<arbiter_proto::proto::client::AuthChallenge, ConnectError> {
     let response = transport
         .recv()
         .await
-        .map_err(|_| AuthError::MissingAuthChallenge)?;
+        .map_err(|_| OneOf::new(MissingAuthChallengeError))?;
 
-    let payload = response.payload.ok_or(AuthError::MissingAuthChallenge)?;
+    let payload = response
+        .payload
+        .ok_or_else(|| OneOf::new(MissingAuthChallengeError))?;
     match payload {
-        ClientResponsePayload::Auth(response) => match response.payload {
+        ClientResponsePayload::AuthChallenge(challenge) => Ok(challenge),
-            Some(AuthResponsePayload::Challenge(challenge)) => Ok(challenge),
+        ClientResponsePayload::AuthResult(result) => Err(map_auth_code_error(result)),
-            Some(AuthResponsePayload::Result(result)) => Err(map_auth_result(result)),
+        _ => Err(OneOf::new(UnexpectedAuthResponseError)),
-            None => Err(AuthError::MissingAuthChallenge),
-        },
-        _ => Err(AuthError::UnexpectedAuthResponse),
     }
 }
 
 async fn send_auth_challenge_solution(
     transport: &mut ClientTransport,
-    key: &SigningKey,
+    key: &ed25519_dalek::SigningKey,
-    challenge: AuthChallenge,
+    challenge: arbiter_proto::proto::client::AuthChallenge,
-) -> std::result::Result<(), AuthError> {
+) -> std::result::Result<(), ConnectError> {
     let challenge_payload = format_challenge(challenge.nonce, &challenge.pubkey);
-    let signature = key
+    let signature = key.sign(&challenge_payload).to_bytes().to_vec();
-        .sign_message(&challenge_payload, CLIENT_CONTEXT)
-        .map_err(|_| AuthError::UnexpectedAuthResponse)?
-        .to_bytes();
 
     transport
         .send(ClientRequest {
             request_id: next_request_id(),
-            payload: Some(ClientRequestPayload::Auth(proto_auth::Request {
+            payload: Some(ClientRequestPayload::AuthChallengeSolution(
-                payload: Some(AuthRequestPayload::ChallengeSolution(
+                AuthChallengeSolution { signature },
-                    AuthChallengeSolution { signature },
+            )),
-                )),
-            })),
         })
         .await
-        .map_err(|_| AuthError::UnexpectedAuthResponse)
+        .map_err(|_| OneOf::new(UnexpectedAuthResponseError))
 }
 
 async fn receive_auth_confirmation(
     transport: &mut ClientTransport,
-) -> std::result::Result<(), AuthError> {
+) -> std::result::Result<(), ConnectError> {
     let response = transport
         .recv()
         .await
-        .map_err(|_| AuthError::UnexpectedAuthResponse)?;
+        .map_err(|_| OneOf::new(UnexpectedAuthResponseError))?;
 
-    let payload = response.payload.ok_or(AuthError::UnexpectedAuthResponse)?;
+    let payload = response
+        .payload
+        .ok_or_else(|| OneOf::new(UnexpectedAuthResponseError))?;
     match payload {
-        ClientResponsePayload::Auth(response) => match response.payload {
+        ClientResponsePayload::AuthResult(result)
-            Some(AuthResponsePayload::Result(result))
+            if AuthResult::try_from(result).ok() == Some(AuthResult::Success) =>
-                if AuthResult::try_from(result).ok() == Some(AuthResult::Success) =>
+        {
-            {
+            Ok(())
-                Ok(())
+        }
-            }
+        ClientResponsePayload::AuthResult(result) => Err(map_auth_code_error(result)),
-            Some(AuthResponsePayload::Result(result)) => Err(map_auth_result(result)),
+        _ => Err(OneOf::new(UnexpectedAuthResponseError)),
-            _ => Err(AuthError::UnexpectedAuthResponse),
-        },
-        _ => Err(AuthError::UnexpectedAuthResponse),
     }
 }
 
 pub(crate) async fn authenticate(
     transport: &mut ClientTransport,
-    metadata: ClientMetadata,
+    key: &ed25519_dalek::SigningKey,
-    key: &SigningKey,
+) -> std::result::Result<(), ConnectError> {
-) -> std::result::Result<(), AuthError> {
+    send_auth_challenge_request(transport, key).await?;
-    send_auth_challenge_request(transport, metadata, key).await?;
     let challenge = receive_auth_challenge(transport).await?;
     send_auth_challenge_solution(transport, key, challenge).await?;
     receive_auth_confirmation(transport).await

server/crates/arbiter-client/src/bin/test_connect.rs

@@ -1,44 +0,0 @@
-use std::io::{self, Write};
-
-use arbiter_client::ArbiterClient;
-use arbiter_proto::{ClientMetadata, url::ArbiterUrl};
-
-#[tokio::main]
-async fn main() {
-    println!("Testing connection to Arbiter server...");
-    print!("Enter ArbiterUrl: ");
-    let _ = io::stdout().flush();
-
-    let mut input = String::new();
-    if let Err(err) = io::stdin().read_line(&mut input) {
-        eprintln!("Failed to read input: {err}");
-        return;
-    }
-
-    let input = input.trim();
-    if input.is_empty() {
-        eprintln!("ArbiterUrl cannot be empty");
-        return;
-    }
-
-    let url = match ArbiterUrl::try_from(input) {
-        Ok(url) => url,
-        Err(err) => {
-            eprintln!("Invalid ArbiterUrl: {err}");
-            return;
-        }
-    };
-
-    println!("{:#?}", url);
-
-    let metadata = ClientMetadata {
-        name: "arbiter-client test_connect".to_string(),
-        description: Some("Manual connection smoke test".to_string()),
-        version: Some(env!("CARGO_PKG_VERSION").to_string()),
-    };
-
-    match ArbiterClient::connect(url, metadata).await {
-        Ok(_) => println!("Connected and authenticated successfully."),
-        Err(err) => eprintln!("Failed to connect: {:#?}", err),
-    }
-}

server/crates/arbiter-client/src/client.rs

@@ -1,87 +1,73 @@
-use arbiter_crypto::authn::SigningKey;
+use arbiter_proto::{proto::arbiter_service_client::ArbiterServiceClient, url::ArbiterUrl};
-use arbiter_proto::{
-    ClientMetadata, proto::arbiter_service_client::ArbiterServiceClient, url::ArbiterUrl,
-};
 use std::sync::Arc;
+use terrors::{Broaden as _, OneOf};
 use tokio::sync::{Mutex, mpsc};
 use tokio_stream::wrappers::ReceiverStream;
 use tonic::transport::ClientTlsConfig;
 
 use crate::{
-    StorageError,
+    auth::authenticate,
-    auth::{AuthError, authenticate},
+    errors::ConnectError,
     storage::{FileSigningKeyStorage, SigningKeyStorage},
     transport::{BUFFER_LENGTH, ClientTransport},
 };
 
+#[cfg(feature = "evm")]
+use crate::errors::{ClientConnectionClosedError, ClientError};
+
 #[cfg(feature = "evm")]
 use crate::wallets::evm::ArbiterEvmWallet;
 
-#[derive(Debug, thiserror::Error)]
-pub enum Error {
-    #[error("gRPC error")]
-    Grpc(#[from] tonic::Status),
-
-    #[error("Could not establish connection")]
-    Connection(#[from] tonic::transport::Error),
-
-    #[error("Invalid server URI")]
-    InvalidUri(#[from] http::uri::InvalidUri),
-
-    #[error("Invalid CA certificate")]
-    InvalidCaCert(#[from] webpki::Error),
-
-    #[error("Authentication error")]
-    Authentication(#[from] AuthError),
-
-    #[error("Storage error")]
-    Storage(#[from] StorageError),
-}
-
 pub struct ArbiterClient {
     #[allow(dead_code)]
     transport: Arc<Mutex<ClientTransport>>,
 }
 
 impl ArbiterClient {
-    pub async fn connect(url: ArbiterUrl, metadata: ClientMetadata) -> Result<Self, Error> {
+    pub async fn connect(url: ArbiterUrl) -> Result<Self, ConnectError> {
-        let storage = FileSigningKeyStorage::from_default_location()?;
+        let storage = FileSigningKeyStorage::from_default_location().broaden()?;
-        Self::connect_with_storage(url, metadata, &storage).await
+        Self::connect_with_storage(url, &storage).await
     }
 
     pub async fn connect_with_storage<S: SigningKeyStorage>(
         url: ArbiterUrl,
-        metadata: ClientMetadata,
         storage: &S,
-    ) -> Result<Self, Error> {
+    ) -> Result<Self, ConnectError> {
-        let key = storage.load_or_create()?;
+        let key = storage.load_or_create().broaden()?;
-        Self::connect_with_key(url, metadata, key).await
+        Self::connect_with_key(url, key).await
     }
 
     pub async fn connect_with_key(
         url: ArbiterUrl,
-        metadata: ClientMetadata,
+        key: ed25519_dalek::SigningKey,
-        key: SigningKey,
+    ) -> Result<Self, ConnectError> {
-    ) -> Result<Self, Error> {
+        let anchor = webpki::anchor_from_trusted_cert(&url.ca_cert)
-        let anchor = webpki::anchor_from_trusted_cert(&url.ca_cert)?.to_owned();
+            .map_err(OneOf::new)?
+            .to_owned();
         let tls = ClientTlsConfig::new().trust_anchor(anchor);
 
-        let channel =
+        let channel = tonic::transport::Channel::from_shared(format!("{}:{}", url.host, url.port))
-            tonic::transport::Channel::from_shared(format!("https://{}:{}", url.host, url.port))?
+            .map_err(OneOf::new)?
-                .tls_config(tls)?
+            .tls_config(tls)
-                .connect()
+            .map_err(OneOf::new)?
-                .await?;
+            .connect()
+            .await
+            .map_err(OneOf::new)?;
 
         let mut client = ArbiterServiceClient::new(channel);
         let (tx, rx) = mpsc::channel(BUFFER_LENGTH);
-        let response_stream = client.client(ReceiverStream::new(rx)).await?.into_inner();
+        let response_stream = client
+            .client(ReceiverStream::new(rx))
+            .await
+            .map_err(OneOf::new)?
+            .into_inner();
 
         let mut transport = ClientTransport {
             sender: tx,
             receiver: response_stream,
         };
 
-        authenticate(&mut transport, metadata, &key).await?;
+        authenticate(&mut transport, &key).await?;
 
         Ok(Self {
             transport: Arc::new(Mutex::new(transport)),
@@ -89,7 +75,8 @@ impl ArbiterClient {
     }
 
     #[cfg(feature = "evm")]
-    pub async fn evm_wallets(&self) -> Result<Vec<ArbiterEvmWallet>, Error> {
+    pub async fn evm_wallets(&self) -> Result<Vec<ArbiterEvmWallet>, ClientError> {
-        todo!("fetch EVM wallet list from server")
+        let _ = &self.transport;
+        Err(OneOf::new(ClientConnectionClosedError))
     }
 }

server/crates/arbiter-client/src/errors.rs

@@ -0,0 +1,127 @@
+use terrors::OneOf;
+use thiserror::Error;
+
+#[cfg(feature = "evm")]
+use alloy::{primitives::ChainId, signers::Error as AlloySignerError};
+
+pub type StorageError = OneOf<(std::io::Error, InvalidKeyLengthError)>;
+
+pub type ConnectError = OneOf<(
+    tonic::transport::Error,
+    http::uri::InvalidUri,
+    webpki::Error,
+    tonic::Status,
+    MissingAuthChallengeError,
+    ApprovalDeniedError,
+    NoUserAgentsOnlineError,
+    UnexpectedAuthResponseError,
+    std::io::Error,
+    InvalidKeyLengthError,
+)>;
+
+pub type ClientError = OneOf<(tonic::Status, ClientConnectionClosedError)>;
+
+pub(crate) type ClientTransportError =
+    OneOf<(TransportChannelClosedError, TransportConnectionClosedError)>;
+
+#[cfg(feature = "evm")]
+pub(crate) type EvmWalletError = OneOf<(
+    EvmChainIdMismatchError,
+    EvmHashSigningUnsupportedError,
+    EvmTransactionSigningUnsupportedError,
+)>;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Invalid signing key length in storage: expected {expected} bytes, got {actual} bytes")]
+pub struct InvalidKeyLengthError {
+    pub expected: usize,
+    pub actual: usize,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Auth challenge was not returned by server")]
+pub struct MissingAuthChallengeError;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Client approval denied by User Agent")]
+pub struct ApprovalDeniedError;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("No User Agents online to approve client")]
+pub struct NoUserAgentsOnlineError;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Unexpected auth response payload")]
+pub struct UnexpectedAuthResponseError;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Connection closed by server")]
+pub struct ClientConnectionClosedError;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Transport channel closed")]
+pub struct TransportChannelClosedError;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Connection closed by server")]
+pub struct TransportConnectionClosedError;
+
+#[cfg(feature = "evm")]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("Transaction chain id mismatch: signer {signer}, tx {tx}")]
+pub struct EvmChainIdMismatchError {
+    pub signer: ChainId,
+    pub tx: ChainId,
+}
+
+#[cfg(feature = "evm")]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("hash-only signing is not supported for ArbiterEvmWallet; use transaction signing")]
+pub struct EvmHashSigningUnsupportedError;
+
+#[cfg(feature = "evm")]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Error)]
+#[error("transaction signing is not supported by current arbiter.client protocol")]
+pub struct EvmTransactionSigningUnsupportedError;
+
+pub(crate) fn map_auth_code_error(code: i32) -> ConnectError {
+    use arbiter_proto::proto::client::AuthResult;
+
+    match AuthResult::try_from(code).unwrap_or(AuthResult::Unspecified) {
+        AuthResult::ApprovalDenied => OneOf::new(ApprovalDeniedError),
+        AuthResult::NoUserAgentsOnline => OneOf::new(NoUserAgentsOnlineError),
+        AuthResult::Unspecified
+        | AuthResult::Success
+        | AuthResult::InvalidKey
+        | AuthResult::InvalidSignature
+        | AuthResult::Internal => OneOf::new(UnexpectedAuthResponseError),
+    }
+}
+
+#[cfg(feature = "evm")]
+impl From<EvmChainIdMismatchError> for AlloySignerError {
+    fn from(value: EvmChainIdMismatchError) -> Self {
+        AlloySignerError::TransactionChainIdMismatch {
+            signer: value.signer,
+            tx: value.tx,
+        }
+    }
+}
+
+#[cfg(feature = "evm")]
+impl From<EvmHashSigningUnsupportedError> for AlloySignerError {
+    fn from(_value: EvmHashSigningUnsupportedError) -> Self {
+        AlloySignerError::other(
+            "hash-only signing is not supported for ArbiterEvmWallet; use transaction signing",
+        )
+    }
+}
+
+#[cfg(feature = "evm")]
+impl From<EvmTransactionSigningUnsupportedError> for AlloySignerError {
+    fn from(_value: EvmTransactionSigningUnsupportedError) -> Self {
+        AlloySignerError::other(
+            "transaction signing is not supported by current arbiter.client protocol",
+        )
+    }
+}

server/crates/arbiter-client/src/lib.rs

@@ -1,12 +1,13 @@
 mod auth;
 mod client;
+mod errors;
 mod storage;
 mod transport;
 pub mod wallets;
 
-pub use auth::AuthError;
+pub use client::ArbiterClient;
-pub use client::{ArbiterClient, Error};
+pub use errors::{ClientError, ConnectError, StorageError};
-pub use storage::{FileSigningKeyStorage, SigningKeyStorage, StorageError};
+pub use storage::{FileSigningKeyStorage, SigningKeyStorage};
 
 #[cfg(feature = "evm")]
-pub use wallets::evm::{ArbiterEvmSignTransactionError, ArbiterEvmWallet};
+pub use wallets::evm::ArbiterEvmWallet;

server/crates/arbiter-client/src/storage.rs

@@ -1,18 +1,11 @@
-use arbiter_crypto::authn::SigningKey;
 use arbiter_proto::home_path;
 use std::path::{Path, PathBuf};
+use terrors::OneOf;
 
-#[derive(Debug, thiserror::Error)]
+use crate::errors::{InvalidKeyLengthError, StorageError};
-pub enum StorageError {
-    #[error("I/O error")]
-    Io(#[from] std::io::Error),
-
-    #[error("Invalid signing key length in storage: expected {expected} bytes, got {actual} bytes")]
-    InvalidKeyLength { expected: usize, actual: usize },
-}
 
 pub trait SigningKeyStorage {
-    fn load_or_create(&self) -> std::result::Result<SigningKey, StorageError>;
+    fn load_or_create(&self) -> std::result::Result<ed25519_dalek::SigningKey, StorageError>;
 }
 
 #[derive(Debug, Clone)]
@@ -21,41 +14,44 @@ pub struct FileSigningKeyStorage {
 }
 
 impl FileSigningKeyStorage {
-    pub const DEFAULT_FILE_NAME: &str = "sdk_client_ml_dsa.key";
+    pub const DEFAULT_FILE_NAME: &str = "sdk_client_ed25519.key";
 
     pub fn new(path: impl Into<PathBuf>) -> Self {
         Self { path: path.into() }
     }
 
     pub fn from_default_location() -> std::result::Result<Self, StorageError> {
-        Ok(Self::new(home_path()?.join(Self::DEFAULT_FILE_NAME)))
+        Ok(Self::new(
+            home_path()
+                .map_err(OneOf::new)?
+                .join(Self::DEFAULT_FILE_NAME),
+        ))
     }
 
-    fn read_key(path: &Path) -> std::result::Result<SigningKey, StorageError> {
+    fn read_key(path: &Path) -> std::result::Result<ed25519_dalek::SigningKey, StorageError> {
-        let bytes = std::fs::read(path)?;
+        let bytes = std::fs::read(path).map_err(OneOf::new)?;
-        let raw: [u8; 32] =
+        let raw: [u8; 32] = bytes.try_into().map_err(|v: Vec<u8>| {
-            bytes
+            OneOf::new(InvalidKeyLengthError {
-                .try_into()
+                expected: 32,
-                .map_err(|v: Vec<u8>| StorageError::InvalidKeyLength {
+                actual: v.len(),
-                    expected: 32,
+            })
-                    actual: v.len(),
+        })?;
-                })?;
+        Ok(ed25519_dalek::SigningKey::from_bytes(&raw))
-        Ok(SigningKey::from_seed(raw))
     }
 }
 
 impl SigningKeyStorage for FileSigningKeyStorage {
-    fn load_or_create(&self) -> std::result::Result<SigningKey, StorageError> {
+    fn load_or_create(&self) -> std::result::Result<ed25519_dalek::SigningKey, StorageError> {
         if let Some(parent) = self.path.parent() {
-            std::fs::create_dir_all(parent)?;
+            std::fs::create_dir_all(parent).map_err(OneOf::new)?;
         }
 
         if self.path.exists() {
             return Self::read_key(&self.path);
         }
 
-        let key = SigningKey::generate();
+        let key = ed25519_dalek::SigningKey::generate(&mut rand::rng());
-        let raw_key = key.to_seed();
+        let raw_key = key.to_bytes();
 
         // Use create_new to prevent accidental overwrite if another process creates the key first.
         match std::fs::OpenOptions::new()
@@ -65,20 +61,21 @@ impl SigningKeyStorage for FileSigningKeyStorage {
         {
             Ok(mut file) => {
                 use std::io::Write as _;
-                file.write_all(&raw_key)?;
+                file.write_all(&raw_key).map_err(OneOf::new)?;
                 Ok(key)
             }
             Err(err) if err.kind() == std::io::ErrorKind::AlreadyExists => {
                 Self::read_key(&self.path)
             }
-            Err(err) => Err(StorageError::Io(err)),
+            Err(err) => Err(OneOf::new(err)),
         }
     }
 }
 
 #[cfg(test)]
 mod tests {
-    use super::{FileSigningKeyStorage, SigningKeyStorage, StorageError};
+    use super::{FileSigningKeyStorage, SigningKeyStorage};
+    use crate::errors::InvalidKeyLengthError;
 
     fn unique_temp_key_path() -> std::path::PathBuf {
         let nanos = std::time::SystemTime::now()
@@ -104,7 +101,7 @@ mod tests {
             .load_or_create()
             .expect("second load_or_create should read same key");
 
-        assert_eq!(key_a.to_seed(), key_b.to_seed());
+        assert_eq!(key_a.to_bytes(), key_b.to_bytes());
         assert!(path.exists());
 
         std::fs::remove_file(path).expect("temp key file should be removable");
@@ -120,12 +117,12 @@ mod tests {
             .load_or_create()
             .expect_err("storage should reject non-32-byte key file");
 
-        match err {
+        match err.narrow::<InvalidKeyLengthError, _>() {
-            StorageError::InvalidKeyLength { expected, actual } => {
+            Ok(invalid_len) => {
-                assert_eq!(expected, 32);
+                assert_eq!(invalid_len.expected, 32);
-                assert_eq!(actual, 31);
+                assert_eq!(invalid_len.actual, 31);
             }
-            other => panic!("unexpected error: {other:?}"),
+            Err(other) => panic!("unexpected io error: {other:?}"),
         }
 
         std::fs::remove_file(path).expect("temp key file should be removable");

server/crates/arbiter-client/src/transport.rs

@@ -1,7 +1,12 @@
 use arbiter_proto::proto::client::{ClientRequest, ClientResponse};
 use std::sync::atomic::{AtomicI32, Ordering};
+use terrors::OneOf;
 use tokio::sync::mpsc;
 
+use crate::errors::{
+    ClientTransportError, TransportChannelClosedError, TransportConnectionClosedError,
+};
+
 pub(crate) const BUFFER_LENGTH: usize = 16;
 static NEXT_REQUEST_ID: AtomicI32 = AtomicI32::new(1);
 
@@ -9,15 +14,6 @@ pub(crate) fn next_request_id() -> i32 {
     NEXT_REQUEST_ID.fetch_add(1, Ordering::Relaxed)
 }
 
-#[derive(Debug, thiserror::Error)]
-pub(crate) enum ClientSignError {
-    #[error("Transport channel closed")]
-    ChannelClosed,
-
-    #[error("Connection closed by server")]
-    ConnectionClosed,
-}
-
 pub(crate) struct ClientTransport {
     pub(crate) sender: mpsc::Sender<ClientRequest>,
     pub(crate) receiver: tonic::Streaming<ClientResponse>,
@@ -27,18 +23,20 @@ impl ClientTransport {
     pub(crate) async fn send(
         &mut self,
         request: ClientRequest,
-    ) -> std::result::Result<(), ClientSignError> {
+    ) -> std::result::Result<(), ClientTransportError> {
         self.sender
             .send(request)
             .await
-            .map_err(|_| ClientSignError::ChannelClosed)
+            .map_err(|_| OneOf::new(TransportChannelClosedError))
     }
 
-    pub(crate) async fn recv(&mut self) -> std::result::Result<ClientResponse, ClientSignError> {
+    pub(crate) async fn recv(
+        &mut self,
+    ) -> std::result::Result<ClientResponse, ClientTransportError> {
         match self.receiver.message().await {
             Ok(Some(resp)) => Ok(resp),
-            Ok(None) => Err(ClientSignError::ConnectionClosed),
+            Ok(None) => Err(OneOf::new(TransportConnectionClosedError)),
-            Err(_) => Err(ClientSignError::ConnectionClosed),
+            Err(_) => Err(OneOf::new(TransportConnectionClosedError)),
         }
     }
 }

server/crates/arbiter-client/src/wallets/evm.rs

@@ -2,56 +2,21 @@ use alloy::{
     consensus::SignableTransaction,
     network::TxSigner,
     primitives::{Address, B256, ChainId, Signature},
-    signers::{Error, Result, Signer},
+    signers::{Result, Signer},
 };
 use async_trait::async_trait;
 use std::sync::Arc;
+use terrors::OneOf;
 use tokio::sync::Mutex;
 
-use arbiter_proto::proto::{
+use crate::{
-    client::{
+    errors::{
-        ClientRequest,
+        EvmChainIdMismatchError, EvmHashSigningUnsupportedError,
-        client_request::Payload as ClientRequestPayload,
+        EvmTransactionSigningUnsupportedError, EvmWalletError,
-        client_response::Payload as ClientResponsePayload,
-        evm::{
-            self as proto_evm, request::Payload as EvmRequestPayload,
-            response::Payload as EvmResponsePayload,
-        },
     },
-    evm::{
+    transport::ClientTransport,
-        EvmSignTransactionRequest,
-        evm_sign_transaction_response::Result as EvmSignTransactionResult,
-    },
-    shared::evm::TransactionEvalError,
 };
 
-use crate::transport::{ClientTransport, next_request_id};
-
-/// A typed error payload returned by [`ArbiterEvmWallet`] transaction signing.
-///
-/// This is wrapped into `alloy::signers::Error::Other`, so consumers can downcast by [`TryFrom`] and
-/// interpret the concrete policy evaluation failure instead of parsing strings.
-#[derive(Debug, thiserror::Error)]
-#[non_exhaustive]
-pub enum ArbiterEvmSignTransactionError {
-    #[error("transaction rejected by policy: {0:?}")]
-    PolicyEval(TransactionEvalError),
-}
-
-impl<'a> TryFrom<&'a Error> for &'a ArbiterEvmSignTransactionError {
-    type Error = ();
-
-    fn try_from(value: &'a Error) -> Result<Self, Self::Error> {
-        if let Error::Other(inner) = value
-            && let Some(eval_error) = inner.downcast_ref()
-        {
-            Ok(eval_error)
-        } else {
-            Err(())
-        }
-    }
-}
-
 pub struct ArbiterEvmWallet {
     transport: Arc<Mutex<ClientTransport>>,
     address: Address,
@@ -59,6 +24,7 @@ pub struct ArbiterEvmWallet {
 }
 
 impl ArbiterEvmWallet {
+    #[allow(dead_code)]
     pub(crate) fn new(transport: Arc<Mutex<ClientTransport>>, address: Address) -> Self {
         Self {
             transport,
@@ -76,14 +42,17 @@ impl ArbiterEvmWallet {
         self
     }
 
-    fn validate_chain_id(&self, tx: &mut dyn SignableTransaction<Signature>) -> Result<()> {
+    fn validate_chain_id(
+        &self,
+        tx: &mut dyn SignableTransaction<Signature>,
+    ) -> std::result::Result<(), EvmWalletError> {
         if let Some(chain_id) = self.chain_id
             && !tx.set_chain_id_checked(chain_id)
         {
-            return Err(Error::TransactionChainIdMismatch {
+            return Err(OneOf::new(EvmChainIdMismatchError {
                 signer: chain_id,
                 tx: tx.chain_id().unwrap(),
-            });
+            }));
         }
 
         Ok(())
@@ -93,9 +62,7 @@ impl ArbiterEvmWallet {
 #[async_trait]
 impl Signer for ArbiterEvmWallet {
     async fn sign_hash(&self, _hash: &B256) -> Result<Signature> {
-        Err(Error::other(
+        Err(EvmWalletError::new(EvmHashSigningUnsupportedError).into())
-            "hash-only signing is not supported for ArbiterEvmWallet; use transaction signing",
-        ))
     }
 
     fn address(&self) -> Address {
@@ -121,72 +88,10 @@ impl TxSigner<Signature> for ArbiterEvmWallet {
         &self,
         tx: &mut dyn SignableTransaction<Signature>,
     ) -> Result<Signature> {
-        self.validate_chain_id(tx)?;
+        let _transport = self.transport.lock().await;
+        self.validate_chain_id(tx)
+            .map_err(OneOf::into::<alloy::signers::Error>)?;
 
-        let mut transport = self.transport.lock().await;
+        Err(EvmWalletError::new(EvmTransactionSigningUnsupportedError).into())
-        let request_id = next_request_id();
-        let rlp_transaction = tx.encoded_for_signing();
-
-        transport
-            .send(ClientRequest {
-                request_id,
-                payload: Some(ClientRequestPayload::Evm(proto_evm::Request {
-                    payload: Some(EvmRequestPayload::SignTransaction(
-                        EvmSignTransactionRequest {
-                            wallet_address: self.address.to_vec(),
-                            rlp_transaction,
-                        },
-                    )),
-                })),
-            })
-            .await
-            .map_err(|_| Error::other("failed to send evm sign transaction request"))?;
-
-        let response = transport
-            .recv()
-            .await
-            .map_err(|_| Error::other("failed to receive evm sign transaction response"))?;
-
-        if response.request_id != Some(request_id) {
-            return Err(Error::other(
-                "received mismatched response id for evm sign transaction",
-            ));
-        }
-
-        let payload = response
-            .payload
-            .ok_or_else(|| Error::other("missing evm sign transaction response payload"))?;
-
-        let ClientResponsePayload::Evm(proto_evm::Response {
-            payload: Some(payload),
-        }) = payload
-        else {
-            return Err(Error::other(
-                "unexpected response payload for evm sign transaction request",
-            ));
-        };
-
-        let EvmResponsePayload::SignTransaction(response) = payload else {
-            return Err(Error::other(
-                "unexpected evm response payload for sign transaction request",
-            ));
-        };
-
-        let result = response
-            .result
-            .ok_or_else(|| Error::other("missing evm sign transaction result"))?;
-
-        match result {
-            EvmSignTransactionResult::Signature(signature) => {
-                Signature::try_from(signature.as_slice())
-                    .map_err(|_| Error::other("invalid signature returned by server"))
-            }
-            EvmSignTransactionResult::EvalError(eval_error) => Err(Error::other(
-                ArbiterEvmSignTransactionError::PolicyEval(eval_error),
-            )),
-            EvmSignTransactionResult::Error(code) => Err(Error::other(format!(
-                "server failed to sign transaction with error code {code}"
-            ))),
-        }
     }
 }

server/crates/arbiter-crypto/.gitignore

@@ -1 +0,0 @@
-/target

server/crates/arbiter-crypto/Cargo.toml

@@ -1,21 +0,0 @@
-[package]
-name = "arbiter-crypto"
-version = "0.1.0"
-edition = "2024"
-
-[dependencies]
-ml-dsa = {workspace = true, optional = true }
-rand = {workspace = true, optional = true}
-base64 = {workspace = true, optional = true }
-memsafe = {version = "0.4.0", optional = true}
-hmac.workspace = true
-alloy.workspace = true
-chrono.workspace = true
-
-[lints]
-workspace = true
-
-[features]
-default = ["authn", "safecell"]
-authn = ["dep:ml-dsa", "dep:rand", "dep:base64"]
-safecell = ["dep:memsafe"]

server/crates/arbiter-crypto/src/authn/mod.rs

@@ -1,2 +0,0 @@
-pub mod v1;
-pub use v1::*;

server/crates/arbiter-crypto/src/authn/v1.rs

@@ -1,193 +0,0 @@
-use base64::{Engine as _, prelude::BASE64_STANDARD};
-use hmac::digest::Digest;
-use ml_dsa::{
-    EncodedVerifyingKey, Error, KeyGen, MlDsa87, Seed, Signature as MlDsaSignature,
-    SigningKey as MlDsaSigningKey, VerifyingKey as MlDsaVerifyingKey, signature::Keypair as _,
-};
-
-pub static CLIENT_CONTEXT: &[u8] = b"arbiter_client";
-pub static USERAGENT_CONTEXT: &[u8] = b"arbiter_user_agent";
-
-pub fn format_challenge(nonce: i32, pubkey: &[u8]) -> Vec<u8> {
-    let concat_form = format!("{}:{}", nonce, BASE64_STANDARD.encode(pubkey));
-    concat_form.into_bytes()
-}
-
-pub type KeyParams = MlDsa87;
-
-#[derive(Clone, Debug, PartialEq)]
-pub struct PublicKey(Box<MlDsaVerifyingKey<KeyParams>>);
-
-impl crate::hashing::Hashable for PublicKey {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        hasher.update(self.to_bytes());
-    }
-}
-
-#[derive(Clone, Debug, PartialEq)]
-pub struct Signature(Box<MlDsaSignature<KeyParams>>);
-
-#[derive(Debug)]
-pub struct SigningKey(Box<MlDsaSigningKey<KeyParams>>);
-
-impl PublicKey {
-    pub fn to_bytes(&self) -> Vec<u8> {
-        self.0.encode().0.to_vec()
-    }
-
-    pub fn verify(&self, nonce: i32, context: &[u8], signature: &Signature) -> bool {
-        self.0.verify_with_context(
-            &format_challenge(nonce, &self.to_bytes()),
-            context,
-            &signature.0,
-        )
-    }
-}
-
-impl Signature {
-    pub fn to_bytes(&self) -> Vec<u8> {
-        self.0.encode().0.to_vec()
-    }
-}
-
-impl SigningKey {
-    pub fn generate() -> Self {
-        Self(Box::new(KeyParams::key_gen(&mut rand::rng())))
-    }
-
-    pub fn from_seed(seed: [u8; 32]) -> Self {
-        Self(Box::new(KeyParams::from_seed(&Seed::from(seed))))
-    }
-
-    pub fn to_seed(&self) -> [u8; 32] {
-        self.0.to_seed().into()
-    }
-
-    pub fn public_key(&self) -> PublicKey {
-        self.0.verifying_key().into()
-    }
-
-    pub fn sign_message(&self, message: &[u8], context: &[u8]) -> Result<Signature, Error> {
-        self.0
-            .signing_key()
-            .sign_deterministic(message, context)
-            .map(Into::into)
-    }
-
-    pub fn sign_challenge(&self, nonce: i32, context: &[u8]) -> Result<Signature, Error> {
-        self.sign_message(
-            &format_challenge(nonce, &self.public_key().to_bytes()),
-            context,
-        )
-    }
-}
-
-impl From<MlDsaVerifyingKey<KeyParams>> for PublicKey {
-    fn from(value: MlDsaVerifyingKey<KeyParams>) -> Self {
-        Self(Box::new(value))
-    }
-}
-
-impl From<MlDsaSignature<KeyParams>> for Signature {
-    fn from(value: MlDsaSignature<KeyParams>) -> Self {
-        Self(Box::new(value))
-    }
-}
-
-impl From<MlDsaSigningKey<KeyParams>> for SigningKey {
-    fn from(value: MlDsaSigningKey<KeyParams>) -> Self {
-        Self(Box::new(value))
-    }
-}
-
-impl TryFrom<Vec<u8>> for PublicKey {
-    type Error = ();
-
-    fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
-        Self::try_from(value.as_slice())
-    }
-}
-
-impl TryFrom<&'_ [u8]> for PublicKey {
-    type Error = ();
-
-    fn try_from(value: &[u8]) -> Result<Self, Self::Error> {
-        let encoded = EncodedVerifyingKey::<KeyParams>::try_from(value).map_err(|_| ())?;
-        Ok(Self(Box::new(MlDsaVerifyingKey::decode(&encoded))))
-    }
-}
-
-impl TryFrom<Vec<u8>> for Signature {
-    type Error = ();
-
-    fn try_from(value: Vec<u8>) -> Result<Self, Self::Error> {
-        Self::try_from(value.as_slice())
-    }
-}
-
-impl TryFrom<&'_ [u8]> for Signature {
-    type Error = ();
-
-    fn try_from(value: &[u8]) -> Result<Self, Self::Error> {
-        MlDsaSignature::try_from(value)
-            .map(|sig| Self(Box::new(sig)))
-            .map_err(|_| ())
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use ml_dsa::{KeyGen, MlDsa87, signature::Keypair as _};
-
-    use super::{CLIENT_CONTEXT, PublicKey, Signature, SigningKey, USERAGENT_CONTEXT};
-
-    #[test]
-    fn public_key_round_trip_decodes() {
-        let key = MlDsa87::key_gen(&mut rand::rng());
-        let encoded = PublicKey::from(key.verifying_key()).to_bytes();
-
-        let decoded = PublicKey::try_from(encoded.as_slice()).expect("public key should decode");
-
-        assert_eq!(decoded, PublicKey::from(key.verifying_key()));
-    }
-
-    #[test]
-    fn signature_round_trip_decodes() {
-        let key = SigningKey::generate();
-        let signature = key
-            .sign_message(b"challenge", CLIENT_CONTEXT)
-            .expect("signature should be created");
-
-        let decoded =
-            Signature::try_from(signature.to_bytes().as_slice()).expect("signature should decode");
-
-        assert_eq!(decoded, signature);
-    }
-
-    #[test]
-    fn challenge_verification_uses_context_and_canonical_key_bytes() {
-        let key = SigningKey::generate();
-        let public_key = key.public_key();
-        let nonce = 17;
-        let signature = key
-            .sign_challenge(nonce, CLIENT_CONTEXT)
-            .expect("signature should be created");
-
-        assert!(public_key.verify(nonce, CLIENT_CONTEXT, &signature));
-        assert!(!public_key.verify(nonce, USERAGENT_CONTEXT, &signature));
-    }
-
-    #[test]
-    fn signing_key_round_trip_seed_preserves_public_key_and_signing() {
-        let original = SigningKey::generate();
-        let restored = SigningKey::from_seed(original.to_seed());
-
-        assert_eq!(restored.public_key(), original.public_key());
-
-        let signature = restored
-            .sign_challenge(9, CLIENT_CONTEXT)
-            .expect("signature should be created");
-
-        assert!(restored.public_key().verify(9, CLIENT_CONTEXT, &signature));
-    }
-}

server/crates/arbiter-crypto/src/hashing.rs

@@ -1,111 +0,0 @@
-pub use hmac::digest::Digest;
-use std::collections::HashSet;
-
-/// Deterministically hash a value by feeding its fields into the hasher in a consistent order.
-#[diagnostic::on_unimplemented(
-    note = "for local types consider adding `#[derive(arbiter_macros::Hashable)]` to your `{Self}` type",
-    note = "for types from other crates check whether the crate offers a `Hashable` implementation"
-)]
-pub trait Hashable {
-    fn hash<H: Digest>(&self, hasher: &mut H);
-}
-
-macro_rules! impl_numeric {
-    ($($t:ty),*) => {
-        $(
-            impl Hashable for $t {
-                fn hash<H: Digest>(&self, hasher: &mut H) {
-                    hasher.update(&self.to_be_bytes());
-                }
-            }
-        )*
-    };
-}
-
-impl_numeric!(u8, u16, u32, u64, i8, i16, i32, i64);
-
-impl Hashable for &[u8] {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        hasher.update(self);
-    }
-}
-
-impl Hashable for String {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        hasher.update(self.as_bytes());
-    }
-}
-
-impl<T: Hashable + PartialOrd> Hashable for Vec<T> {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        let ref_sorted = {
-            let mut sorted = self.iter().collect::<Vec<_>>();
-            sorted.sort_by(|a, b| a.partial_cmp(b).unwrap());
-            sorted
-        };
-        for item in ref_sorted {
-            item.hash(hasher);
-        }
-    }
-}
-
-impl<T: Hashable + PartialOrd> Hashable for HashSet<T> {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        let ref_sorted = {
-            let mut sorted = self.iter().collect::<Vec<_>>();
-            sorted.sort_by(|a, b| a.partial_cmp(b).unwrap());
-            sorted
-        };
-        for item in ref_sorted {
-            item.hash(hasher);
-        }
-    }
-}
-
-impl<T: Hashable> Hashable for Option<T> {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        match self {
-            Some(value) => {
-                hasher.update([1]);
-                value.hash(hasher);
-            }
-            None => hasher.update([0]),
-        }
-    }
-}
-
-impl<T: Hashable> Hashable for Box<T> {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        self.as_ref().hash(hasher);
-    }
-}
-
-impl<T: Hashable> Hashable for &T {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        (*self).hash(hasher);
-    }
-}
-
-impl Hashable for alloy::primitives::Address {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        hasher.update(self.as_slice());
-    }
-}
-
-impl Hashable for alloy::primitives::U256 {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        hasher.update(self.to_be_bytes::<32>());
-    }
-}
-
-impl Hashable for chrono::Duration {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        hasher.update(self.num_seconds().to_be_bytes());
-    }
-}
-
-impl Hashable for chrono::DateTime<chrono::Utc> {
-    fn hash<H: Digest>(&self, hasher: &mut H) {
-        hasher.update(self.timestamp_millis().to_be_bytes());
-    }
-}

server/crates/arbiter-crypto/src/lib.rs

@@ -1,5 +0,0 @@
-#[cfg(feature = "authn")]
-pub mod authn;
-pub mod hashing;
-#[cfg(feature = "safecell")]
-pub mod safecell;

server/crates/arbiter-macros/Cargo.toml

@@ -1,18 +0,0 @@
-[package]
-name = "arbiter-macros"
-version = "0.1.0"
-edition = "2024"
-
-[lib]
-proc-macro = true
-
-[dependencies]
-proc-macro2 = "1.0"
-quote = "1.0"
-syn = { version = "2.0", features = ["derive", "fold", "full", "visit-mut"] }
-
-[dev-dependencies]
-arbiter-crypto = { path = "../arbiter-crypto" }
-
-[lints]
-workspace = true

server/crates/arbiter-macros/src/hashable.rs

@@ -1,133 +0,0 @@
-use proc_macro2::{Span, TokenStream, TokenTree};
-use quote::quote;
-use syn::parse_quote;
-use syn::spanned::Spanned;
-use syn::{DataStruct, DeriveInput, Fields, Generics, Index};
-
-use crate::utils::{HASHABLE_TRAIT_PATH, HMAC_DIGEST_PATH};
-
-pub(crate) fn derive(input: &DeriveInput) -> TokenStream {
-    match &input.data {
-        syn::Data::Struct(struct_data) => hashable_struct(input, struct_data),
-        syn::Data::Enum(_) => {
-            syn::Error::new_spanned(input, "Hashable can currently be derived only for structs")
-                .to_compile_error()
-        }
-        syn::Data::Union(_) => {
-            syn::Error::new_spanned(input, "Hashable cannot be derived for unions")
-                .to_compile_error()
-        }
-    }
-}
-
-fn hashable_struct(input: &DeriveInput, struct_data: &syn::DataStruct) -> TokenStream {
-    let ident = &input.ident;
-    let hashable_trait = HASHABLE_TRAIT_PATH.to_path();
-    let hmac_digest = HMAC_DIGEST_PATH.to_path();
-    let generics = add_hashable_bounds(input.generics.clone(), &hashable_trait);
-    let field_accesses = collect_field_accesses(struct_data);
-    let hash_calls = build_hash_calls(&field_accesses, &hashable_trait);
-
-    let (impl_generics, ty_generics, where_clause) = generics.split_for_impl();
-
-    quote! {
-        #[automatically_derived]
-        impl #impl_generics #hashable_trait for #ident #ty_generics #where_clause {
-            fn hash<H: #hmac_digest>(&self, hasher: &mut H) {
-                #(#hash_calls)*
-            }
-        }
-    }
-}
-
-fn add_hashable_bounds(mut generics: Generics, hashable_trait: &syn::Path) -> Generics {
-    for type_param in generics.type_params_mut() {
-        type_param.bounds.push(parse_quote!(#hashable_trait));
-    }
-
-    generics
-}
-
-struct FieldAccess {
-    access: TokenStream,
-    span: Span,
-}
-
-fn collect_field_accesses(struct_data: &DataStruct) -> Vec<FieldAccess> {
-    match &struct_data.fields {
-        Fields::Named(fields) => {
-            // Keep deterministic alphabetical order for named fields.
-            // Do not remove this sort, because it keeps hash output stable regardless of source order.
-            let mut named_fields = fields
-                .named
-                .iter()
-                .map(|field| {
-                    let name = field
-                        .ident
-                        .as_ref()
-                        .expect("Fields::Named(fields) must have names")
-                        .clone();
-                    (name.to_string(), name)
-                })
-                .collect::<Vec<_>>();
-
-            named_fields.sort_by(|a, b| a.0.cmp(&b.0));
-
-            named_fields
-                .into_iter()
-                .map(|(_, name)| FieldAccess {
-                    access: quote! { #name },
-                    span: name.span(),
-                })
-                .collect()
-        }
-        Fields::Unnamed(fields) => fields
-            .unnamed
-            .iter()
-            .enumerate()
-            .map(|(i, field)| FieldAccess {
-                access: {
-                    let index = Index::from(i);
-                    quote! { #index }
-                },
-                span: field.ty.span(),
-            })
-            .collect(),
-        Fields::Unit => Vec::new(),
-    }
-}
-
-fn build_hash_calls(
-    field_accesses: &[FieldAccess],
-    hashable_trait: &syn::Path,
-) -> Vec<TokenStream> {
-    field_accesses
-        .iter()
-        .map(|field| {
-            let access = &field.access;
-            let call = quote! {
-                #hashable_trait::hash(&self.#access, hasher);
-            };
-
-            respan(call, field.span)
-        })
-        .collect()
-}
-
-/// Recursively set span on all tokens, including interpolated ones.
-fn respan(tokens: TokenStream, span: Span) -> TokenStream {
-    tokens
-        .into_iter()
-        .map(|tt| match tt {
-            TokenTree::Group(g) => {
-                let mut new = proc_macro2::Group::new(g.delimiter(), respan(g.stream(), span));
-                new.set_span(span);
-                TokenTree::Group(new)
-            }
-            mut other => {
-                other.set_span(span);
-                other
-            }
-        })
-        .collect()
-}

server/crates/arbiter-macros/src/lib.rs

@@ -1,10 +0,0 @@
-use syn::{DeriveInput, parse_macro_input};
-
-mod hashable;
-mod utils;
-
-#[proc_macro_derive(Hashable)]
-pub fn derive_hashable(input: proc_macro::TokenStream) -> proc_macro::TokenStream {
-    let input = parse_macro_input!(input as DeriveInput);
-    hashable::derive(&input).into()
-}

server/crates/arbiter-macros/src/utils.rs

@@ -1,19 +0,0 @@
-pub struct ToPath(pub &'static str);
-
-impl ToPath {
-    pub fn to_path(&self) -> syn::Path {
-        syn::parse_str(self.0).expect("Invalid path")
-    }
-}
-
-macro_rules! ensure_path {
-    ($path:path) => {{
-        #[cfg(test)]
-        #[expect(unused_imports)]
-        use $path as _;
-        ToPath(stringify!($path))
-    }};
-}
-
-pub const HASHABLE_TRAIT_PATH: ToPath = ensure_path!(::arbiter_crypto::hashing::Hashable);
-pub const HMAC_DIGEST_PATH: ToPath = ensure_path!(::arbiter_crypto::hashing::Digest);

server/crates/arbiter-proto/Cargo.toml

@@ -11,13 +11,13 @@ tokio.workspace = true
 futures.workspace = true
 hex = "0.4.3"
 tonic-prost = "0.14.5"
-prost.workspace = true
+prost = "0.14.3"
 kameo.workspace = true
 url = "2.5.8"
 miette.workspace = true
 thiserror.workspace = true
 rustls-pki-types.workspace = true
-base64.workspace = true
+base64 = "0.22.1"
 prost-types.workspace = true
 tracing.workspace = true
 async-trait.workspace = true

server/crates/arbiter-proto/build.rs

@@ -1,21 +1,32 @@
+use std::path::PathBuf;
 use tonic_prost_build::configure;
 
 static PROTOBUF_DIR: &str = "../../../protobufs";
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    println!("cargo::rerun-if-changed={PROTOBUF_DIR}");
+    let manifest_dir = PathBuf::from(std::env::var("CARGO_MANIFEST_DIR")?);
+    let protobuf_dir = manifest_dir.join(PROTOBUF_DIR);
+    let protoc_include = protoc_bin_vendored::include_path()?;
+    let protoc_path = protoc_bin_vendored::protoc_bin_path()?;
+
+    unsafe {
+        std::env::set_var("PROTOC", &protoc_path);
+        std::env::set_var("PROTOC_INCLUDE", &protoc_include);
+    }
+
+    println!("cargo::rerun-if-changed={}", protobuf_dir.display());
 
     configure()
         .message_attribute(".", "#[derive(::kameo::Reply)]")
+        .compile_well_known_types(true)
         .compile_protos(
             &[
-                format!("{}/arbiter.proto", PROTOBUF_DIR),
+                protobuf_dir.join("arbiter.proto"),
-                format!("{}/user_agent.proto", PROTOBUF_DIR),
+                protobuf_dir.join("user_agent.proto"),
-                format!("{}/client.proto", PROTOBUF_DIR),
+                protobuf_dir.join("client.proto"),
-                format!("{}/evm.proto", PROTOBUF_DIR),
+                protobuf_dir.join("evm.proto"),
             ],
-            &[PROTOBUF_DIR.to_string()],
+            &[protobuf_dir],
-        )
+        )?;
-        .unwrap();
     Ok(())
 }

server/crates/arbiter-proto/src/lib.rs

@@ -1,59 +1,23 @@
 pub mod transport;
 pub mod url;
 
+use base64::{Engine, prelude::BASE64_STANDARD};
+
+pub mod google {
+    pub mod protobuf {
+        tonic::include_proto!("google.protobuf");
+    }
+}
+
 pub mod proto {
     tonic::include_proto!("arbiter");
 
-    pub mod shared {
-        tonic::include_proto!("arbiter.shared");
-
-        pub mod evm {
-            tonic::include_proto!("arbiter.shared.evm");
-        }
-    }
-
     pub mod user_agent {
         tonic::include_proto!("arbiter.user_agent");
-
-        pub mod auth {
-            tonic::include_proto!("arbiter.user_agent.auth");
-        }
-
-        pub mod evm {
-            tonic::include_proto!("arbiter.user_agent.evm");
-        }
-
-        pub mod sdk_client {
-            tonic::include_proto!("arbiter.user_agent.sdk_client");
-        }
-
-        pub mod vault {
-            tonic::include_proto!("arbiter.user_agent.vault");
-
-            pub mod bootstrap {
-                tonic::include_proto!("arbiter.user_agent.vault.bootstrap");
-            }
-
-            pub mod unseal {
-                tonic::include_proto!("arbiter.user_agent.vault.unseal");
-            }
-        }
     }
 
     pub mod client {
         tonic::include_proto!("arbiter.client");
-
-        pub mod auth {
-            tonic::include_proto!("arbiter.client.auth");
-        }
-
-        pub mod evm {
-            tonic::include_proto!("arbiter.client.evm");
-        }
-
-        pub mod vault {
-            tonic::include_proto!("arbiter.client.vault");
-        }
     }
 
     pub mod evm {
@@ -61,13 +25,6 @@ pub mod proto {
     }
 }
 
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct ClientMetadata {
-    pub name: String,
-    pub description: Option<String>,
-    pub version: Option<String>,
-}
-
 pub static BOOTSTRAP_PATH: &str = "bootstrap_token";
 
 pub fn home_path() -> Result<std::path::PathBuf, std::io::Error> {
@@ -82,3 +39,8 @@ pub fn home_path() -> Result<std::path::PathBuf, std::io::Error> {
 
     Ok(arbiter_home)
 }
+
+pub fn format_challenge(nonce: i32, pubkey: &[u8]) -> Vec<u8> {
+    let concat_form = format!("{}:{}", nonce, BASE64_STANDARD.encode(pubkey));
+    concat_form.into_bytes()
+}

server/crates/arbiter-proto/src/transport.rs

@@ -89,7 +89,7 @@ pub trait Sender<Outbound>: Send + Sync {
 }
 
 #[async_trait]
-pub trait Receiver<Inbound>: Send + Sync {
+pub trait Receiver<Inbound>: Send + Sync  {
     async fn recv(&mut self) -> Option<Inbound>;
 }
 

server/crates/arbiter-proto/src/url.rs

@@ -7,7 +7,6 @@ const ARBITER_URL_SCHEME: &str = "arbiter";
 const CERT_QUERY_KEY: &str = "cert";
 const BOOTSTRAP_TOKEN_QUERY_KEY: &str = "bootstrap_token";
 
-#[derive(Debug, Clone)]
 pub struct ArbiterUrl {
     pub host: String,
     pub port: u16,

server/crates/arbiter-server/Cargo.toml

@@ -16,9 +16,8 @@ diesel-async = { version = "0.8.0", features = [
     "sqlite",
     "tokio",
 ] }
+ed25519-dalek.workspace = true
 arbiter-proto.path = "../arbiter-proto"
-arbiter-crypto.path = "../arbiter-crypto"
-arbiter-macros.path = "../arbiter-macros"
 tracing.workspace = true
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 tonic.workspace = true
@@ -26,6 +25,7 @@ tonic.features = ["tls-aws-lc"]
 tokio.workspace = true
 rustls.workspace = true
 smlang.workspace = true
+miette.workspace = true
 thiserror.workspace = true
 fatality = "0.1.1"
 diesel_migrations = { version = "2.3.1", features = ["sqlite"] }
@@ -37,31 +37,23 @@ dashmap = "6.1.0"
 rand.workspace = true
 rcgen.workspace = true
 chrono.workspace = true
+memsafe = "0.4.0"
 zeroize = { version = "1.8.2", features = ["std", "simd"] }
 kameo.workspace = true
+x25519-dalek.workspace = true
 chacha20poly1305 = { version = "0.10.1", features = ["std"] }
 argon2 = { version = "0.5.3", features = ["zeroize"] }
 restructed = "0.2.2"
 strum = { version = "0.28.0", features = ["derive"] }
 pem = "3.0.6"
+k256.workspace = true
+rsa.workspace = true
 sha2.workspace = true
-hmac.workspace = true
 spki.workspace = true
 alloy.workspace = true
 prost-types.workspace = true
-prost.workspace = true
 arbiter-tokens-registry.path = "../arbiter-tokens-registry"
-anyhow = "1.0.102"
-serde_with = "3.18.0"
-mutants.workspace = true
-subtle = "2.6.1"
-ml-dsa.workspace = true
-ed25519-dalek.workspace = true
-x25519-dalek.workspace = true
-k256.workspace = true
 
 [dev-dependencies]
 insta = "1.46.3"
-proptest = "1.11.0"
-rstest.workspace = true
 test-log = { version = "0.2", default-features = false, features = ["trace"] }

server/crates/arbiter-server/migrations/2026-02-14-171124-0000_init/up.sql

@@ -28,7 +28,7 @@ create table if not exists tls_history (
     id INTEGER not null PRIMARY KEY,
     cert text not null,
     cert_key text not null, -- PEM Encoded private key
-    ca_cert text not null,
+    ca_cert text not null, 
     ca_key text not null, -- PEM Encoded private key
     created_at integer not null default(unixepoch ('now'))
 ) STRICT;
@@ -40,51 +40,25 @@ create table if not exists arbiter_settings (
     tls_id integer references tls_history (id) on delete RESTRICT
 ) STRICT;
 
-insert into arbiter_settings (id) values (1) on conflict do nothing;
+insert into arbiter_settings (id) values (1) on conflict do nothing; -- ensure singleton row exists
--- ensure singleton row exists
 
 create table if not exists useragent_client (
     id integer not null primary key,
     nonce integer not null default(1), -- used for auth challenge
     public_key blob not null,
-    key_type integer not null default(1),
+    key_type integer not null default(1), -- 1=Ed25519, 2=ECDSA(secp256k1)
     created_at integer not null default(unixepoch ('now')),
     updated_at integer not null default(unixepoch ('now'))
 ) STRICT;
-create unique index if not exists uniq_useragent_client_public_key on useragent_client (public_key, key_type);
-
-create table if not exists client_metadata (
-    id integer not null primary key,
-    name text not null, -- human-readable name for the client
-    description text, -- optional description for the client
-    version text, -- client version for tracking and debugging
-    created_at integer not null default(unixepoch ('now'))
-) STRICT;
-
--- created to track history of changes
-create table if not exists client_metadata_history (
-    id integer not null primary key,
-    metadata_id integer not null references client_metadata (id) on delete cascade,
-    client_id integer not null references program_client (id) on delete cascade,
-    created_at integer not null default(unixepoch ('now'))
-) STRICT;
-
-create unique index if not exists uniq_metadata_binding_client on client_metadata_history (client_id);
 
 create table if not exists program_client (
     id integer not null primary key,
     nonce integer not null default(1), -- used for auth challenge
     public_key blob not null,
-    metadata_id integer not null references client_metadata (id) on delete cascade,
     created_at integer not null default(unixepoch ('now')),
     updated_at integer not null default(unixepoch ('now'))
 ) STRICT;
 
-create unique index if not exists program_client_public_key_unique
-    on program_client (public_key);
-
-create unique index if not exists uniq_program_client_public_key on program_client (public_key);
-
 create table if not exists evm_wallet (
     id integer not null primary key,
     address blob not null, -- 20-byte Ethereum address
@@ -93,117 +67,95 @@ create table if not exists evm_wallet (
 ) STRICT;
 
 create unique index if not exists uniq_evm_wallet_address on evm_wallet (address);
-
 create unique index if not exists uniq_evm_wallet_aead on evm_wallet (aead_encrypted_id);
 
-create table if not exists evm_wallet_access (
-    id integer not null primary key,
-    wallet_id integer not null references evm_wallet (id) on delete cascade,
-    client_id integer not null references program_client (id) on delete cascade,
-    created_at integer not null default(unixepoch ('now'))
-) STRICT;
-
-create unique index if not exists uniq_wallet_access on evm_wallet_access (wallet_id, client_id);
-
 create table if not exists evm_ether_transfer_limit (
     id integer not null primary key,
-    window_secs integer not null, -- window duration in seconds
+    window_secs integer not null,           -- window duration in seconds
-    max_volume blob not null -- big-endian 32-byte U256
+    max_volume blob not null                -- big-endian 32-byte U256
 ) STRICT;
 
 -- Shared grant properties: client scope, timeframe, fee caps, and rate limit
 create table if not exists evm_basic_grant (
     id integer not null primary key,
-    wallet_access_id integer not null references evm_wallet_access (id) on delete restrict,
+    wallet_id integer not null references evm_wallet(id) on delete restrict, 
-    chain_id integer not null, -- EIP-155 chain ID
+    client_id integer not null references program_client(id) on delete restrict,
-    valid_from integer, -- unix timestamp (seconds), null = no lower bound
+    chain_id integer not null,              -- EIP-155 chain ID
-    valid_until integer, -- unix timestamp (seconds), null = no upper bound
+    valid_from integer,                     -- unix timestamp (seconds), null = no lower bound
-    max_gas_fee_per_gas blob, -- big-endian 32-byte U256, null = unlimited
+    valid_until integer,                    -- unix timestamp (seconds), null = no upper bound
-    max_priority_fee_per_gas blob, -- big-endian 32-byte U256, null = unlimited
+    max_gas_fee_per_gas blob,               -- big-endian 32-byte U256, null = unlimited
-    rate_limit_count integer, -- max transactions in window, null = unlimited
+    max_priority_fee_per_gas blob,          -- big-endian 32-byte U256, null = unlimited
-    rate_limit_window_secs integer, -- window duration in seconds, null = unlimited
+    rate_limit_count integer,               -- max transactions in window, null = unlimited
-    revoked_at integer, -- unix timestamp when revoked, null = still active
+    rate_limit_window_secs integer,         -- window duration in seconds, null = unlimited
-    created_at integer not null default(unixepoch ('now'))
+    revoked_at integer,                     -- unix timestamp when revoked, null = still active
+    created_at integer not null default(unixepoch('now'))
 ) STRICT;
 
 -- Shared transaction log for all EVM grants, used for rate limit tracking and auditing
 create table if not exists evm_transaction_log (
     id integer not null primary key,
-    wallet_access_id integer not null references evm_wallet_access (id) on delete restrict,
+    grant_id integer not null references evm_basic_grant(id) on delete restrict,
-    grant_id integer not null references evm_basic_grant (id) on delete restrict,
+    client_id integer not null references program_client(id) on delete restrict,
+    wallet_id integer not null references evm_wallet(id) on delete restrict,
     chain_id integer not null,
-    eth_value blob not null, -- always present on any EVM tx
+    eth_value blob not null,     -- always present on any EVM tx
-    signed_at integer not null default(unixepoch ('now'))
+    signed_at integer not null default(unixepoch('now'))
 ) STRICT;
 
-create index if not exists idx_evm_basic_grant_access_chain on evm_basic_grant (wallet_access_id, chain_id);
+create index if not exists idx_evm_basic_grant_wallet_chain on evm_basic_grant(client_id, wallet_id, chain_id);
 
 -- ===============================
 -- ERC20 token transfer grant
 -- ===============================
 create table if not exists evm_token_transfer_grant (
     id integer not null primary key,
-    basic_grant_id integer not null unique references evm_basic_grant (id) on delete cascade,
+    basic_grant_id integer not null unique references evm_basic_grant(id) on delete cascade,
-    token_contract blob not null, -- 20-byte ERC20 contract address
+    token_contract blob not null,            -- 20-byte ERC20 contract address
-    receiver blob -- 20-byte recipient address or null if every recipient allowed
+    receiver blob                            -- 20-byte recipient address or null if every recipient allowed
 ) STRICT;
 
 -- Per-window volume limits for token transfer grants
 create table if not exists evm_token_transfer_volume_limit (
     id integer not null primary key,
-    grant_id integer not null references evm_token_transfer_grant (id) on delete cascade,
+    grant_id integer not null references evm_token_transfer_grant(id) on delete cascade,
-    window_secs integer not null, -- window duration in seconds
+    window_secs integer not null,           -- window duration in seconds
-    max_volume blob not null -- big-endian 32-byte U256
+    max_volume blob not null                -- big-endian 32-byte U256
 ) STRICT;
 
 -- Log table for token transfer grant usage
 create table if not exists evm_token_transfer_log (
     id integer not null primary key,
-    grant_id integer not null references evm_token_transfer_grant (id) on delete restrict,
+    grant_id integer not null references evm_token_transfer_grant(id) on delete restrict,
-    log_id integer not null references evm_transaction_log (id) on delete restrict,
+    log_id integer not null references evm_transaction_log(id) on delete restrict,
-    chain_id integer not null, -- EIP-155 chain ID
+    chain_id integer not null,              -- EIP-155 chain ID
-    token_contract blob not null, -- 20-byte ERC20 contract address
+    token_contract blob not null,           -- 20-byte ERC20 contract address
-    recipient_address blob not null, -- 20-byte recipient address
+    recipient_address blob not null,        -- 20-byte recipient address
-    value blob not null, -- big-endian 32-byte U256
+    value blob not null,                    -- big-endian 32-byte U256
-    created_at integer not null default(unixepoch ('now'))
+    created_at integer not null default(unixepoch('now'))
 ) STRICT;
 
-create index if not exists idx_token_transfer_log_grant on evm_token_transfer_log (grant_id);
+create index if not exists idx_token_transfer_log_grant on evm_token_transfer_log(grant_id);
+create index if not exists idx_token_transfer_log_log_id on evm_token_transfer_log(log_id);
+create index if not exists idx_token_transfer_log_chain on evm_token_transfer_log(chain_id);
 
-create index if not exists idx_token_transfer_log_log_id on evm_token_transfer_log (log_id);
-
-create index if not exists idx_token_transfer_log_chain on evm_token_transfer_log (chain_id);
 
 -- ===============================
 -- Ether transfer grant (uses base log)
 -- ===============================
 create table if not exists evm_ether_transfer_grant (
     id integer not null primary key,
-    basic_grant_id integer not null unique references evm_basic_grant (id) on delete cascade,
+    basic_grant_id integer not null unique references evm_basic_grant(id) on delete cascade,
-    limit_id integer not null references evm_ether_transfer_limit (id) on delete restrict
+    limit_id integer not null references evm_ether_transfer_limit(id) on delete restrict
 ) STRICT;
 
 -- Specific recipient addresses for an ether transfer grant
 create table if not exists evm_ether_transfer_grant_target (
     id integer not null primary key,
-    grant_id integer not null references evm_ether_transfer_grant (id) on delete cascade,
+    grant_id integer not null references evm_ether_transfer_grant(id) on delete cascade,
-    address blob not null -- 20-byte recipient address
+    address blob not null                   -- 20-byte recipient address
 ) STRICT;
 
-create unique index if not exists uniq_ether_transfer_target on evm_ether_transfer_grant_target (grant_id, address);
+create unique index if not exists uniq_ether_transfer_target on evm_ether_transfer_grant_target(grant_id, address);
 
--- ===============================
+CREATE UNIQUE INDEX program_client_public_key_unique
--- Integrity Envelopes
+    ON program_client (public_key);
--- ===============================
-create table if not exists integrity_envelope (
-    id integer not null primary key,
-    entity_kind text not null,
-    entity_id blob not null,
-    payload_version integer not null,
-    key_version integer not null,
-    mac blob not null, -- 20-byte recipient address
-    signed_at integer not null default(unixepoch ('now')),
-    created_at integer not null default(unixepoch ('now'))
-) STRICT;
-
-create unique index if not exists uniq_integrity_envelope_entity on integrity_envelope (entity_kind, entity_id);

server/crates/arbiter-server/src/actors/bootstrap.rs

@@ -2,9 +2,8 @@ use arbiter_proto::{BOOTSTRAP_PATH, home_path};
 use diesel::QueryDsl;
 use diesel_async::RunQueryDsl;
 use kameo::{Actor, messages};
-
+use miette::Diagnostic;
 use rand::{RngExt, distr::Alphanumeric, make_rng, rngs::StdRng};
-use subtle::ConstantTimeEq as _;
 use thiserror::Error;
 
 use crate::db::{self, DatabasePool, schema};
@@ -26,15 +25,18 @@ pub async fn generate_token() -> Result<String, std::io::Error> {
     Ok(token)
 }
 
-#[derive(Error, Debug)]
+#[derive(Error, Debug, Diagnostic)]
 pub enum Error {
     #[error("Database error: {0}")]
+    #[diagnostic(code(arbiter_server::bootstrap::database))]
     Database(#[from] db::PoolError),
 
     #[error("Database query error: {0}")]
+    #[diagnostic(code(arbiter_server::bootstrap::database_query))]
     Query(#[from] diesel::result::Error),
 
     #[error("I/O error: {0}")]
+    #[diagnostic(code(arbiter_server::bootstrap::io))]
     Io(#[from] std::io::Error),
 }
 
@@ -45,14 +47,14 @@ pub struct Bootstrapper {
 
 impl Bootstrapper {
     pub async fn new(db: &DatabasePool) -> Result<Self, Error> {
-        let row_count: i64 = {
+        let mut conn = db.get().await?;
-            let mut conn = db.get().await?;
 
-            schema::useragent_client::table
+        let row_count: i64 = schema::useragent_client::table
-                .count()
+            .count()
-                .get_result(&mut conn)
+            .get_result(&mut conn)
-                .await?
+            .await?;
-        };
+
+        drop(conn);
 
         let token = if row_count == 0 {
             let token = generate_token().await?;
@@ -70,13 +72,7 @@ impl Bootstrapper {
     #[message]
     pub fn is_correct_token(&self, token: String) -> bool {
         match &self.token {
-            Some(expected) => {
+            Some(expected) => *expected == token,
-                let expected_bytes = expected.as_bytes();
-                let token_bytes = token.as_bytes();
-
-                let choice = expected_bytes.ct_eq(token_bytes);
-                bool::from(choice)
-            }
             None => false,
         }
     }

server/crates/arbiter-server/src/actors/client/auth.rs

@@ -1,29 +1,21 @@
-use arbiter_crypto::authn::{self, CLIENT_CONTEXT};
 use arbiter_proto::{
-    ClientMetadata,
+    format_challenge,
     transport::{Bi, expect_message},
 };
-use chrono::Utc;
 use diesel::{
-    ExpressionMethods as _, OptionalExtension as _, QueryDsl as _, SelectableHelper as _,
+    ExpressionMethods as _, OptionalExtension as _, QueryDsl as _, dsl::insert_into, update,
-    dsl::insert_into, update,
 };
 use diesel_async::RunQueryDsl as _;
-use kameo::{actor::ActorRef, error::SendError};
+use ed25519_dalek::{Signature, VerifyingKey};
+use kameo::error::SendError;
 use tracing::error;
 
 use crate::{
     actors::{
-        client::{ClientConnection, ClientCredentials, ClientProfile},
+        client::ClientConnection,
-        flow_coordinator::{self, RequestClientApproval},
+        router::{self, RequestClientApproval},
-        keyholder::KeyHolder,
-    },
-    crypto::integrity::{self, AttestationStatus},
-    db::{
-        self,
-        models::{ProgramClientMetadata, SqliteTimestamp},
-        schema::program_client,
     },
+    db::{self, schema::program_client},
 };
 
 #[derive(thiserror::Error, Debug, Clone, PartialEq, Eq)]
@@ -32,8 +24,6 @@ pub enum Error {
     DatabasePoolUnavailable,
     #[error("Database operation failed")]
     DatabaseOperationFailed,
-    #[error("Integrity check failed")]
-    IntegrityCheckFailed,
     #[error("Invalid challenge solution")]
     InvalidChallengeSolution,
     #[error("Client approval request failed")]
@@ -42,13 +32,6 @@ pub enum Error {
     Transport,
 }
 
-impl From<diesel::result::Error> for Error {
-    fn from(e: diesel::result::Error) -> Self {
-        error!(?e, "Database error");
-        Self::DatabaseOperationFailed
-    }
-}
-
 #[derive(thiserror::Error, Debug, Clone, PartialEq, Eq)]
 pub enum ApproveError {
     #[error("Internal error")]
@@ -56,99 +39,25 @@ pub enum ApproveError {
     #[error("Client connection denied by user agents")]
     Denied,
     #[error("Upstream error: {0}")]
-    Upstream(flow_coordinator::ApprovalError),
+    Upstream(router::ApprovalError),
 }
 
 #[derive(Debug, Clone)]
 pub enum Inbound {
-    AuthChallengeRequest {
+    AuthChallengeRequest { pubkey: VerifyingKey },
-        pubkey: authn::PublicKey,
+    AuthChallengeSolution { signature: Signature },
-        metadata: ClientMetadata,
-    },
-    AuthChallengeSolution {
-        signature: authn::Signature,
-    },
 }
 
 #[derive(Debug, Clone)]
 pub enum Outbound {
-    AuthChallenge {
+    AuthChallenge { pubkey: VerifyingKey, nonce: i32 },
-        pubkey: authn::PublicKey,
-        nonce: i32,
-    },
     AuthSuccess,
 }
 
-/// Returns the current nonce and client ID for a registered client.
+/// Atomically reads and increments the nonce for a known client.
 /// Returns `None` if the pubkey is not registered.
-async fn get_current_nonce_and_id(
+async fn get_nonce(db: &db::DatabasePool, pubkey: &VerifyingKey) -> Result<Option<i32>, Error> {
-    db: &db::DatabasePool,
+    let pubkey_bytes = pubkey.as_bytes().to_vec();
-    pubkey: &authn::PublicKey,
-) -> Result<Option<(i32, i32)>, Error> {
-    let pubkey_bytes = pubkey.to_bytes();
-    let mut conn = db.get().await.map_err(|e| {
-        error!(error = ?e, "Database pool error");
-        Error::DatabasePoolUnavailable
-    })?;
-    program_client::table
-        .filter(program_client::public_key.eq(&pubkey_bytes))
-        .select((program_client::id, program_client::nonce))
-        .first::<(i32, i32)>(&mut conn)
-        .await
-        .optional()
-        .map_err(|e| {
-            error!(error = ?e, "Database error");
-            Error::DatabaseOperationFailed
-        })
-}
-
-async fn verify_integrity(
-    db: &db::DatabasePool,
-    keyholder: &ActorRef<KeyHolder>,
-    pubkey: &authn::PublicKey,
-) -> Result<(), Error> {
-    let mut db_conn = db.get().await.map_err(|e| {
-        error!(error = ?e, "Database pool error");
-        Error::DatabasePoolUnavailable
-    })?;
-
-    let (id, nonce) = get_current_nonce_and_id(db, pubkey).await?.ok_or_else(|| {
-        error!("Client not found during integrity verification");
-        Error::DatabaseOperationFailed
-    })?;
-
-    let attestation = integrity::verify_entity(
-        &mut db_conn,
-        keyholder,
-        &ClientCredentials {
-            pubkey: pubkey.clone(),
-            nonce,
-        },
-        id,
-    )
-    .await
-    .map_err(|e| {
-        error!(?e, "Integrity verification failed");
-        Error::IntegrityCheckFailed
-    })?;
-
-    if attestation != AttestationStatus::Attested {
-        error!("Integrity attestation unavailable for client {id}");
-        return Err(Error::IntegrityCheckFailed);
-    }
-
-    Ok(())
-}
-
-/// Atomically increments the nonce and re-signs the integrity envelope.
-/// Returns the new nonce, which is used as the challenge nonce.
-async fn create_nonce(
-    db: &db::DatabasePool,
-    keyholder: &ActorRef<KeyHolder>,
-    pubkey: &authn::PublicKey,
-) -> Result<i32, Error> {
-    let pubkey_bytes = pubkey.to_bytes();
-    let pubkey = pubkey.clone();
 
     let mut conn = db.get().await.map_err(|e| {
         error!(error = ?e, "Database pool error");
@@ -156,44 +65,44 @@ async fn create_nonce(
     })?;
 
     conn.exclusive_transaction(|conn| {
-        let keyholder = keyholder.clone();
+        let pubkey_bytes = pubkey_bytes.clone();
-        let pubkey = pubkey.clone();
         Box::pin(async move {
-            let (id, new_nonce): (i32, i32) = update(program_client::table)
+            let Some((client_id, current_nonce)) = program_client::table
                 .filter(program_client::public_key.eq(&pubkey_bytes))
-                .set(program_client::nonce.eq(program_client::nonce + 1))
+                .select((program_client::id, program_client::nonce))
-                .returning((program_client::id, program_client::nonce))
+                .first::<(i32, i32)>(conn)
-                .get_result(conn)
+                .await
+                .optional()?
+            else {
+                return Result::<_, diesel::result::Error>::Ok(None);
+            };
+
+            update(program_client::table)
+                .filter(program_client::public_key.eq(&pubkey_bytes))
+                .set(program_client::nonce.eq(current_nonce + 1))
+                .execute(conn)
                 .await?;
 
-            integrity::sign_entity(
+            let _ = client_id;
-                conn,
+            Ok(Some(current_nonce))
-                &keyholder,
-                &ClientCredentials {
-                    pubkey: pubkey.clone(),
-                    nonce: new_nonce,
-                },
-                id,
-            )
-            .await
-            .map_err(|e| {
-                error!(?e, "Integrity sign failed after nonce update");
-                Error::DatabaseOperationFailed
-            })?;
-
-            Ok(new_nonce)
         })
     })
     .await
+    .map_err(|e| {
+        error!(error = ?e, "Database error");
+        Error::DatabaseOperationFailed
+    })
 }
 
 async fn approve_new_client(
     actors: &crate::actors::GlobalActors,
-    profile: ClientProfile,
+    pubkey: VerifyingKey,
 ) -> Result<(), Error> {
     let result = actors
-        .flow_coordinator
+        .router
-        .ask(RequestClientApproval { client: profile })
+        .ask(RequestClientApproval {
+            client_pubkey: pubkey,
+        })
         .await;
 
     match result {
@@ -204,159 +113,77 @@ async fn approve_new_client(
             Err(Error::ApproveError(ApproveError::Upstream(e)))
         }
         Err(e) => {
-            error!(error = ?e, "Approval request to flow coordinator failed");
+            error!(error = ?e, "Approval request to router failed");
             Err(Error::ApproveError(ApproveError::Internal))
         }
     }
 }
 
-async fn insert_client(
+enum InsertClientResult {
-    db: &db::DatabasePool,
+    Inserted,
-    keyholder: &ActorRef<KeyHolder>,
+    AlreadyExists,
-    pubkey: &authn::PublicKey,
-    metadata: &ClientMetadata,
-) -> Result<i32, Error> {
-    use crate::db::schema::{client_metadata, program_client};
-    let pubkey = pubkey.clone();
-    let metadata = metadata.clone();
-
-    let mut conn = db.get().await.map_err(|e| {
-        error!(error = ?e, "Database pool error");
-        Error::DatabasePoolUnavailable
-    })?;
-
-    conn.exclusive_transaction(|conn| {
-        let keyholder = keyholder.clone();
-        let pubkey = pubkey.clone();
-        Box::pin(async move {
-            const NONCE_START: i32 = 1;
-
-            let metadata_id = insert_into(client_metadata::table)
-                .values((
-                    client_metadata::name.eq(&metadata.name),
-                    client_metadata::description.eq(&metadata.description),
-                    client_metadata::version.eq(&metadata.version),
-                ))
-                .returning(client_metadata::id)
-                .get_result::<i32>(conn)
-                .await?;
-
-            let client_id = insert_into(program_client::table)
-                .values((
-                    program_client::public_key.eq(pubkey.to_bytes()),
-                    program_client::metadata_id.eq(metadata_id),
-                    program_client::nonce.eq(NONCE_START),
-                ))
-                .on_conflict_do_nothing()
-                .returning(program_client::id)
-                .get_result::<i32>(conn)
-                .await?;
-
-            integrity::sign_entity(
-                conn,
-                &keyholder,
-                &ClientCredentials {
-                    pubkey: pubkey.clone(),
-                    nonce: NONCE_START,
-                },
-                client_id,
-            )
-            .await
-            .map_err(|e| {
-                error!(error = ?e, "Failed to sign integrity tag for new client key");
-                Error::DatabaseOperationFailed
-            })?;
-
-            Ok(client_id)
-        })
-    })
-    .await
 }
 
-async fn sync_client_metadata(
+async fn insert_client(
     db: &db::DatabasePool,
-    client_id: i32,
+    pubkey: &VerifyingKey,
-    metadata: &ClientMetadata,
+) -> Result<InsertClientResult, Error> {
-) -> Result<(), Error> {
+    let now = std::time::SystemTime::now()
-    use crate::db::schema::{client_metadata, client_metadata_history};
+        .duration_since(std::time::UNIX_EPOCH)
-
+        .unwrap_or_default()
-    let now = SqliteTimestamp(Utc::now());
+        .as_secs() as i32;
 
     let mut conn = db.get().await.map_err(|e| {
         error!(error = ?e, "Database pool error");
         Error::DatabasePoolUnavailable
     })?;
 
-    conn.exclusive_transaction(|conn| {
+    match insert_into(program_client::table)
-        let metadata = metadata.clone();
+        .values((
-        Box::pin(async move {
+            program_client::public_key.eq(pubkey.as_bytes().to_vec()),
-            let (current_metadata_id, current): (i32, ProgramClientMetadata) =
+            program_client::nonce.eq(1), // pre-incremented; challenge uses 0
-                program_client::table
+            program_client::created_at.eq(now),
-                    .find(client_id)
+            program_client::updated_at.eq(now),
-                    .inner_join(client_metadata::table)
+        ))
-                    .select((
+        .execute(&mut conn)
-                        program_client::metadata_id,
+        .await
-                        ProgramClientMetadata::as_select(),
+    {
-                    ))
+        Ok(_) => {}
-                    .first(conn)
+        Err(diesel::result::Error::DatabaseError(
-                    .await?;
+            diesel::result::DatabaseErrorKind::UniqueViolation,
+            _,
+        )) => return Ok(InsertClientResult::AlreadyExists),
+        Err(e) => {
+            error!(error = ?e, "Failed to insert new client");
+            return Err(Error::DatabaseOperationFailed);
+        }
+    }
 
-            let unchanged = current.name == metadata.name
+    let client_id = program_client::table
-                && current.description == metadata.description
+        .filter(program_client::public_key.eq(pubkey.as_bytes().to_vec()))
-                && current.version == metadata.version;
+        .order(program_client::id.desc())
-            if unchanged {
+        .select(program_client::id)
-                return Ok(());
+        .first::<i32>(&mut conn)
-            }
+        .await
+        .map_err(|e| {
+            error!(error = ?e, "Failed to load inserted client id");
+            Error::DatabaseOperationFailed
+        })?;
 
-            insert_into(client_metadata_history::table)
+    let _ = client_id;
-                .values((
+    Ok(InsertClientResult::Inserted)
-                    client_metadata_history::metadata_id.eq(current_metadata_id),
-                    client_metadata_history::client_id.eq(client_id),
-                ))
-                .execute(conn)
-                .await?;
-
-            let metadata_id = insert_into(client_metadata::table)
-                .values((
-                    client_metadata::name.eq(&metadata.name),
-                    client_metadata::description.eq(&metadata.description),
-                    client_metadata::version.eq(&metadata.version),
-                ))
-                .returning(client_metadata::id)
-                .get_result::<i32>(conn)
-                .await?;
-
-            update(program_client::table.find(client_id))
-                .set((
-                    program_client::metadata_id.eq(metadata_id),
-                    program_client::updated_at.eq(now),
-                ))
-                .execute(conn)
-                .await?;
-
-            Ok::<(), diesel::result::Error>(())
-        })
-    })
-    .await
-    .map_err(|e| {
-        error!(error = ?e, "Database error");
-        Error::DatabaseOperationFailed
-    })
 }
 
 async fn challenge_client<T>(
     transport: &mut T,
-    pubkey: authn::PublicKey,
+    pubkey: VerifyingKey,
     nonce: i32,
 ) -> Result<(), Error>
 where
     T: Bi<Inbound, Result<Outbound, Error>> + ?Sized,
 {
     transport
-        .send(Ok(Outbound::AuthChallenge {
+        .send(Ok(Outbound::AuthChallenge { pubkey, nonce }))
-            pubkey: pubkey.clone(),
-            nonce,
-        }))
         .await
         .map_err(|e| {
             error!(error = ?e, "Failed to send auth challenge");
@@ -373,44 +200,43 @@ where
         Error::Transport
     })?;
 
-    if !pubkey.verify(nonce, CLIENT_CONTEXT, &signature) {
+    let formatted = format_challenge(nonce, pubkey.as_bytes());
+
+    pubkey.verify_strict(&formatted, &signature).map_err(|_| {
         error!("Challenge solution verification failed");
-        return Err(Error::InvalidChallengeSolution);
+        Error::InvalidChallengeSolution
-    }
+    })?;
 
     Ok(())
 }
 
-pub async fn authenticate<T>(props: &mut ClientConnection, transport: &mut T) -> Result<i32, Error>
+pub async fn authenticate<T>(
+    props: &mut ClientConnection,
+    transport: &mut T,
+) -> Result<VerifyingKey, Error>
 where
     T: Bi<Inbound, Result<Outbound, Error>> + Send + ?Sized,
 {
-    let Some(Inbound::AuthChallengeRequest { pubkey, metadata }) = transport.recv().await else {
+    let Some(Inbound::AuthChallengeRequest { pubkey }) = transport.recv().await
+    else {
         return Err(Error::Transport);
     };
 
-    let client_id = match get_current_nonce_and_id(&props.db, &pubkey).await? {
+    let nonce = match get_nonce(&props.db, &pubkey).await? {
-        Some((id, _)) => {
+        Some(nonce) => nonce,
-            verify_integrity(&props.db, &props.actors.key_holder, &pubkey).await?;
-            id
-        }
         None => {
-            approve_new_client(
+            approve_new_client(&props.actors, pubkey).await?;
-                &props.actors,
+            match insert_client(&props.db, &pubkey).await? {
-                ClientProfile {
+                InsertClientResult::Inserted => 0,
-                    pubkey: pubkey.clone(),
+                InsertClientResult::AlreadyExists => match get_nonce(&props.db, &pubkey).await? {
-                    metadata: metadata.clone(),
+                    Some(nonce) => nonce,
+                    None => return Err(Error::DatabaseOperationFailed),
                 },
-            )
+            }
-            .await?;
-            insert_client(&props.db, &props.actors.key_holder, &pubkey, &metadata).await?
         }
     };
 
-    sync_client_metadata(&props.db, client_id, &metadata).await?;
+    challenge_client(transport, pubkey, nonce).await?;
-    let challenge_nonce = create_nonce(&props.db, &props.actors.key_holder, &pubkey).await?;
-    challenge_client(transport, pubkey, challenge_nonce).await?;
-
     transport
         .send(Ok(Outbound::AuthSuccess))
         .await
@@ -419,5 +245,5 @@ where
             Error::Transport
         })?;
 
-    Ok(client_id)
+    Ok(pubkey)
 }

server/crates/arbiter-server/src/actors/client/mod.rs

@@ -1,30 +1,12 @@
-use arbiter_crypto::authn;
+use arbiter_proto::transport::Bi;
-use arbiter_proto::{ClientMetadata, transport::Bi};
 use kameo::actor::Spawn;
 use tracing::{error, info};
 
 use crate::{
     actors::{GlobalActors, client::session::ClientSession},
-    crypto::integrity::Integrable,
     db,
 };
 
-#[derive(Debug, Clone)]
-pub struct ClientProfile {
-    pub pubkey: authn::PublicKey,
-    pub metadata: ClientMetadata,
-}
-
-#[derive(arbiter_macros::Hashable)]
-pub struct ClientCredentials {
-    pub pubkey: authn::PublicKey,
-    pub nonce: i32,
-}
-
-impl Integrable for ClientCredentials {
-    const KIND: &'static str = "client_credentials";
-}
-
 pub struct ClientConnection {
     pub(crate) db: db::DatabasePool,
     pub(crate) actors: GlobalActors,
@@ -43,11 +25,9 @@ pub async fn connect_client<T>(mut props: ClientConnection, transport: &mut T)
 where
     T: Bi<auth::Inbound, Result<auth::Outbound, auth::Error>> + Send + ?Sized,
 {
-    let fut = auth::authenticate(&mut props, transport);
+    match auth::authenticate(&mut props, transport).await {
-    println!("authenticate future size: {}", std::mem::size_of_val(&fut));
+        Ok(_pubkey) => {
-    match fut.await {
+            ClientSession::spawn(ClientSession::new(props));
-        Ok(client_id) => {
-            ClientSession::spawn(ClientSession::new(props, client_id));
             info!("Client authenticated, session started");
         }
         Err(err) => {

server/crates/arbiter-server/src/actors/client/session.rs

@@ -1,28 +1,20 @@
 use kameo::{Actor, messages};
 use tracing::error;
 
-use alloy::{consensus::TxEip1559, primitives::Address, signers::Signature};
-
 use crate::{
     actors::{
-        GlobalActors,
+        GlobalActors, client::ClientConnection, keyholder::KeyHolderState, router::RegisterClient,
-        client::ClientConnection,
-        evm::{ClientSignTransaction, SignTransactionError},
-        flow_coordinator::RegisterClient,
-        keyholder::KeyHolderState,
     },
     db,
-    evm::VetError,
 };
 
 pub struct ClientSession {
     props: ClientConnection,
-    client_id: i32,
 }
 
 impl ClientSession {
-    pub(crate) fn new(props: ClientConnection, client_id: i32) -> Self {
+    pub(crate) fn new(props: ClientConnection) -> Self {
-        Self { props, client_id }
+        Self { props }
     }
 }
 
@@ -42,34 +34,6 @@ impl ClientSession {
 
         Ok(vault_state)
     }
-
-    #[message]
-    pub(crate) async fn handle_sign_transaction(
-        &mut self,
-        wallet_address: Address,
-        transaction: TxEip1559,
-    ) -> Result<Signature, SignTransactionRpcError> {
-        match self
-            .props
-            .actors
-            .evm
-            .ask(ClientSignTransaction {
-                client_id: self.client_id,
-                wallet_address,
-                transaction,
-            })
-            .await
-        {
-            Ok(signature) => Ok(signature),
-            Err(kameo::error::SendError::HandlerError(SignTransactionError::Vet(vet_error))) => {
-                Err(SignTransactionRpcError::Vet(vet_error))
-            }
-            Err(err) => {
-                error!(?err, "Failed to sign EVM transaction in client session");
-                Err(SignTransactionRpcError::Internal)
-            }
-        }
-    }
 }
 
 impl Actor for ClientSession {
@@ -83,7 +47,7 @@ impl Actor for ClientSession {
     ) -> Result<Self, Self::Error> {
         args.props
             .actors
-            .flow_coordinator
+            .router
             .ask(RegisterClient { actor: this })
             .await
             .map_err(|_| Error::ConnectionRegistrationFailed)?;
@@ -94,10 +58,7 @@ impl Actor for ClientSession {
 impl ClientSession {
     pub fn new_test(db: db::DatabasePool, actors: GlobalActors) -> Self {
         let props = ClientConnection::new(db, actors);
-        Self {
+        Self { props }
-            props,
-            client_id: 0,
-        }
     }
 }
 
@@ -108,12 +69,3 @@ pub enum Error {
     #[error("Internal error")]
     Internal,
 }
-
-#[derive(Debug, thiserror::Error)]
-pub enum SignTransactionRpcError {
-    #[error("Policy evaluation failed")]
-    Vet(#[from] VetError),
-
-    #[error("Internal error")]
-    Internal,
-}

server/crates/arbiter-server/src/actors/evm/mod.rs

@@ -8,58 +8,75 @@ use rand::{SeedableRng, rng, rngs::StdRng};
 
 use crate::{
     actors::keyholder::{CreateNew, Decrypt, KeyHolder},
-    crypto::integrity,
     db::{
-        DatabaseError, DatabasePool,
+        self, DatabasePool,
-        models::{self},
+        models::{self, SqliteTimestamp},
         schema,
     },
     evm::{
-        self, ListError, RunKind,
+        self, ListGrantsError, RunKind,
         policies::{
-            CombinedSettings, Grant, SharedGrantSettings, SpecificGrant, SpecificMeaning,
+            FullGrant, Grant, SharedGrantSettings, SpecificGrant, SpecificMeaning,
             ether_transfer::EtherTransfer, token_transfers::TokenTransfer,
         },
     },
+    safe_cell::{SafeCell, SafeCellHandle as _},
 };
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
 
 pub use crate::evm::safe_signer;
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
 pub enum SignTransactionError {
     #[error("Wallet not found")]
+    #[diagnostic(code(arbiter::evm::sign::wallet_not_found))]
     WalletNotFound,
 
     #[error("Database error: {0}")]
-    Database(#[from] DatabaseError),
+    #[diagnostic(code(arbiter::evm::sign::database))]
+    Database(#[from] diesel::result::Error),
+
+    #[error("Database pool error: {0}")]
+    #[diagnostic(code(arbiter::evm::sign::pool))]
+    Pool(#[from] db::PoolError),
 
     #[error("Keyholder error: {0}")]
+    #[diagnostic(code(arbiter::evm::sign::keyholder))]
     Keyholder(#[from] crate::actors::keyholder::Error),
 
     #[error("Keyholder mailbox error")]
+    #[diagnostic(code(arbiter::evm::sign::keyholder_send))]
     KeyholderSend,
 
     #[error("Signing error: {0}")]
+    #[diagnostic(code(arbiter::evm::sign::signing))]
     Signing(#[from] alloy::signers::Error),
 
     #[error("Policy error: {0}")]
+    #[diagnostic(code(arbiter::evm::sign::vet))]
     Vet(#[from] evm::VetError),
 }
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
 pub enum Error {
     #[error("Keyholder error: {0}")]
+    #[diagnostic(code(arbiter::evm::keyholder))]
     Keyholder(#[from] crate::actors::keyholder::Error),
 
     #[error("Keyholder mailbox error")]
+    #[diagnostic(code(arbiter::evm::keyholder_send))]
     KeyholderSend,
 
     #[error("Database error: {0}")]
-    Database(#[from] DatabaseError),
+    #[diagnostic(code(arbiter::evm::database))]
+    Database(#[from] diesel::result::Error),
 
-    #[error("Integrity violation: {0}")]
+    #[error("Database pool error: {0}")]
-    Integrity(#[from] integrity::Error),
+    #[diagnostic(code(arbiter::evm::database_pool))]
+    DatabasePool(#[from] db::PoolError),
+
+    #[error("Grant creation error: {0}")]
+    #[diagnostic(code(arbiter::evm::creation))]
+    Creation(#[from] evm::CreationError),
 }
 
 #[derive(Actor)]
@@ -75,7 +92,7 @@ impl EvmActor {
         // is it safe to seed rng from system once?
         // todo: audit
         let rng = StdRng::from_rng(&mut rng());
-        let engine = evm::Engine::new(db.clone(), keyholder.clone());
+        let engine = evm::Engine::new(db.clone());
         Self {
             keyholder,
             db,
@@ -88,7 +105,7 @@ impl EvmActor {
 #[messages]
 impl EvmActor {
     #[message]
-    pub async fn generate(&mut self) -> Result<(i32, Address), Error> {
+    pub async fn generate(&mut self) -> Result<Address, Error> {
         let (mut key_cell, address) = safe_signer::generate(&mut self.rng);
 
         let plaintext = key_cell.read_inline(|reader| SafeCell::new(reader.to_vec()));
@@ -99,32 +116,29 @@ impl EvmActor {
             .await
             .map_err(|_| Error::KeyholderSend)?;
 
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
+        let mut conn = self.db.get().await?;
-        let wallet_id = insert_into(schema::evm_wallet::table)
+        insert_into(schema::evm_wallet::table)
             .values(&models::NewEvmWallet {
                 address: address.as_slice().to_vec(),
                 aead_encrypted_id: aead_id,
             })
-            .returning(schema::evm_wallet::id)
+            .execute(&mut conn)
-            .get_result(&mut conn)
+            .await?;
-            .await
-            .map_err(DatabaseError::from)?;
 
-        Ok((wallet_id, address))
+        Ok(address)
     }
 
     #[message]
-    pub async fn list_wallets(&self) -> Result<Vec<(i32, Address)>, Error> {
+    pub async fn list_wallets(&self) -> Result<Vec<Address>, Error> {
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
+        let mut conn = self.db.get().await?;
         let rows: Vec<models::EvmWallet> = schema::evm_wallet::table
             .select(models::EvmWallet::as_select())
             .load(&mut conn)
-            .await
+            .await?;
-            .map_err(DatabaseError::from)?;
 
         Ok(rows
             .into_iter()
-            .map(|w| (w.id, Address::from_slice(&w.address)))
+            .map(|w| Address::from_slice(&w.address))
             .collect())
     }
 }
@@ -134,60 +148,53 @@ impl EvmActor {
     #[message]
     pub async fn useragent_create_grant(
         &mut self,
+        client_id: i32,
         basic: SharedGrantSettings,
         grant: SpecificGrant,
-    ) -> Result<i32, Error> {
+    ) -> Result<i32, evm::CreationError> {
         match grant {
-            SpecificGrant::EtherTransfer(settings) => self
+            SpecificGrant::EtherTransfer(settings) => {
-                .engine
+                self.engine
-                .create_grant::<EtherTransfer>(CombinedSettings {
+                    .create_grant::<EtherTransfer>(
-                    shared: basic,
+                        client_id,
-                    specific: settings,
+                        FullGrant {
-                })
+                            basic,
-                .await
+                            specific: settings,
-                .map_err(Error::from),
+                        },
-            SpecificGrant::TokenTransfer(settings) => self
+                    )
-                .engine
+                    .await
-                .create_grant::<TokenTransfer>(CombinedSettings {
+            }
-                    shared: basic,
+            SpecificGrant::TokenTransfer(settings) => {
-                    specific: settings,
+                self.engine
-                })
+                    .create_grant::<TokenTransfer>(
-                .await
+                        client_id,
-                .map_err(Error::from),
+                        FullGrant {
+                            basic,
+                            specific: settings,
+                        },
+                    )
+                    .await
+            }
         }
     }
 
     #[message]
-    pub async fn useragent_delete_grant(&mut self, _grant_id: i32) -> Result<(), Error> {
+    pub async fn useragent_delete_grant(&mut self, grant_id: i32) -> Result<(), Error> {
-        // let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
+        let mut conn = self.db.get().await?;
-        // let keyholder = self.keyholder.clone();
+        diesel::update(schema::evm_basic_grant::table)
-
+            .filter(schema::evm_basic_grant::id.eq(grant_id))
-        // diesel_async::AsyncConnection::transaction(&mut conn, |conn| {
+            .set(schema::evm_basic_grant::revoked_at.eq(SqliteTimestamp::now()))
-        //     Box::pin(async move {
+            .execute(&mut conn)
-        //         diesel::update(schema::evm_basic_grant::table)
+            .await?;
-        //             .filter(schema::evm_basic_grant::id.eq(grant_id))
+        Ok(())
-        //             .set(schema::evm_basic_grant::revoked_at.eq(SqliteTimestamp::now()))
-        //             .execute(conn)
-        //             .await?;
-
-        //         let signed = integrity::evm::load_signed_grant_by_basic_id(conn, grant_id).await?;
-
-        //         diesel::result::QueryResult::Ok(())
-        //     })
-        // })
-        // .await
-        // .map_err(DatabaseError::from)?;
-
-        // Ok(())
-        todo!()
     }
 
     #[message]
     pub async fn useragent_list_grants(&mut self) -> Result<Vec<Grant<SpecificGrant>>, Error> {
         match self.engine.list_all_grants().await {
             Ok(grants) => Ok(grants),
-            Err(ListError::Database(db_err)) => Err(Error::Database(db_err)),
+            Err(ListGrantsError::Database(db)) => Err(Error::Database(db)),
-            Err(ListError::Integrity(integrity_err)) => Err(Error::Integrity(integrity_err)),
+            Err(ListGrantsError::Pool(pool)) => Err(Error::DatabasePool(pool)),
         }
     }
 
@@ -198,29 +205,24 @@ impl EvmActor {
         wallet_address: Address,
         transaction: TxEip1559,
     ) -> Result<SpecificMeaning, SignTransactionError> {
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
+        let mut conn = self.db.get().await?;
         let wallet = schema::evm_wallet::table
             .select(models::EvmWallet::as_select())
             .filter(schema::evm_wallet::address.eq(wallet_address.as_slice()))
             .first(&mut conn)
             .await
-            .optional()
+            .optional()?
-            .map_err(DatabaseError::from)?
-            .ok_or(SignTransactionError::WalletNotFound)?;
-        let wallet_access = schema::evm_wallet_access::table
-            .select(models::EvmWalletAccess::as_select())
-            .filter(schema::evm_wallet_access::wallet_id.eq(wallet.id))
-            .filter(schema::evm_wallet_access::client_id.eq(client_id))
-            .first(&mut conn)
-            .await
-            .optional()
-            .map_err(DatabaseError::from)?
             .ok_or(SignTransactionError::WalletNotFound)?;
         drop(conn);
 
         let meaning = self
             .engine
-            .evaluate_transaction(wallet_access, transaction.clone(), RunKind::Execution)
+            .evaluate_transaction(
+                wallet.id,
+                client_id,
+                transaction.clone(),
+                RunKind::Execution,
+            )
             .await?;
 
         Ok(meaning)
@@ -233,23 +235,13 @@ impl EvmActor {
         wallet_address: Address,
         mut transaction: TxEip1559,
     ) -> Result<Signature, SignTransactionError> {
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
+        let mut conn = self.db.get().await?;
         let wallet = schema::evm_wallet::table
             .select(models::EvmWallet::as_select())
             .filter(schema::evm_wallet::address.eq(wallet_address.as_slice()))
             .first(&mut conn)
             .await
-            .optional()
+            .optional()?
-            .map_err(DatabaseError::from)?
-            .ok_or(SignTransactionError::WalletNotFound)?;
-        let wallet_access = schema::evm_wallet_access::table
-            .select(models::EvmWalletAccess::as_select())
-            .filter(schema::evm_wallet_access::wallet_id.eq(wallet.id))
-            .filter(schema::evm_wallet_access::client_id.eq(client_id))
-            .first(&mut conn)
-            .await
-            .optional()
-            .map_err(DatabaseError::from)?
             .ok_or(SignTransactionError::WalletNotFound)?;
         drop(conn);
 
@@ -264,7 +256,12 @@ impl EvmActor {
         let signer = safe_signer::SafeSigner::from_cell(raw_key)?;
 
         self.engine
-            .evaluate_transaction(wallet_access, transaction.clone(), RunKind::Execution)
+            .evaluate_transaction(
+                wallet.id,
+                client_id,
+                transaction.clone(),
+                RunKind::Execution,
+            )
             .await?;
 
         use alloy::network::TxSignerSync as _;

server/crates/arbiter-server/src/actors/flow_coordinator/client_connect_approval.rs

@@ -1,105 +0,0 @@
-use std::ops::ControlFlow;
-
-use kameo::{
-    Actor, messages,
-    prelude::{ActorId, ActorRef, ActorStopReason, Context, WeakActorRef},
-    reply::ReplySender,
-};
-
-use crate::actors::{
-    client::ClientProfile,
-    flow_coordinator::ApprovalError,
-    user_agent::{UserAgentSession, session::BeginNewClientApproval},
-};
-
-pub struct Args {
-    pub client: ClientProfile,
-    pub user_agents: Vec<ActorRef<UserAgentSession>>,
-    pub reply: ReplySender<Result<bool, ApprovalError>>,
-}
-
-pub struct ClientApprovalController {
-    /// Number of UAs that have not yet responded (approval or denial) or died.
-    pending: usize,
-    /// Number of approvals received so far.
-    approved: usize,
-    reply: Option<ReplySender<Result<bool, ApprovalError>>>,
-}
-
-impl ClientApprovalController {
-    fn send_reply(&mut self, result: Result<bool, ApprovalError>) {
-        if let Some(reply) = self.reply.take() {
-            reply.send(result);
-        }
-    }
-}
-
-impl Actor for ClientApprovalController {
-    type Args = Args;
-    type Error = ();
-
-    async fn on_start(
-        Args {
-            client,
-            mut user_agents,
-            reply,
-        }: Self::Args,
-        actor_ref: ActorRef<Self>,
-    ) -> Result<Self, Self::Error> {
-        let this = Self {
-            pending: user_agents.len(),
-            approved: 0,
-            reply: Some(reply),
-        };
-
-        for user_agent in user_agents.drain(..) {
-            actor_ref.link(&user_agent).await;
-            let _ = user_agent
-                .tell(BeginNewClientApproval {
-                    client: client.clone(),
-                    controller: actor_ref.clone(),
-                })
-                .await;
-        }
-
-        Ok(this)
-    }
-
-    async fn on_link_died(
-        &mut self,
-        _: WeakActorRef<Self>,
-        _: ActorId,
-        _: ActorStopReason,
-    ) -> Result<ControlFlow<ActorStopReason>, Self::Error> {
-        // A linked UA died before responding — counts as a non-approval.
-        self.pending = self.pending.saturating_sub(1);
-        if self.pending == 0 {
-            // At least one UA didn't approve: deny.
-            self.send_reply(Ok(false));
-            return Ok(ControlFlow::Break(ActorStopReason::Normal));
-        }
-        Ok(ControlFlow::Continue(()))
-    }
-}
-
-#[messages]
-impl ClientApprovalController {
-    #[message(ctx)]
-    pub async fn client_approval_answer(&mut self, approved: bool, ctx: &mut Context<Self, ()>) {
-        if !approved {
-            // Denial wins immediately regardless of other pending responses.
-            self.send_reply(Ok(false));
-            ctx.stop();
-            return;
-        }
-
-        self.approved += 1;
-        self.pending = self.pending.saturating_sub(1);
-
-        if self.pending == 0 {
-            // Every connected UA approved.
-            self.send_reply(Ok(true));
-            ctx.stop();
-        }
-    }
-}

server/crates/arbiter-server/src/actors/flow_coordinator/mod.rs

@@ -1,118 +0,0 @@
-use std::{collections::HashMap, ops::ControlFlow};
-
-use kameo::{
-    Actor,
-    actor::{ActorId, ActorRef, Spawn},
-    messages,
-    prelude::{ActorStopReason, Context, WeakActorRef},
-    reply::DelegatedReply,
-};
-use tracing::info;
-
-use crate::actors::{
-    client::{ClientProfile, session::ClientSession},
-    flow_coordinator::client_connect_approval::ClientApprovalController,
-    user_agent::session::UserAgentSession,
-};
-
-pub mod client_connect_approval;
-
-#[derive(Default)]
-pub struct FlowCoordinator {
-    pub user_agents: HashMap<ActorId, ActorRef<UserAgentSession>>,
-    pub clients: HashMap<ActorId, ActorRef<ClientSession>>,
-}
-
-impl Actor for FlowCoordinator {
-    type Args = Self;
-
-    type Error = ();
-
-    async fn on_start(args: Self::Args, _: ActorRef<Self>) -> Result<Self, Self::Error> {
-        Ok(args)
-    }
-
-    async fn on_link_died(
-        &mut self,
-        _: WeakActorRef<Self>,
-        id: ActorId,
-        _: ActorStopReason,
-    ) -> Result<ControlFlow<ActorStopReason>, Self::Error> {
-        if self.user_agents.remove(&id).is_some() {
-            info!(
-                ?id,
-                actor = "FlowCoordinator",
-                event = "useragent.disconnected"
-            );
-        } else if self.clients.remove(&id).is_some() {
-            info!(
-                ?id,
-                actor = "FlowCoordinator",
-                event = "client.disconnected"
-            );
-        } else {
-            info!(
-                ?id,
-                actor = "FlowCoordinator",
-                event = "unknown.actor.disconnected"
-            );
-        }
-        Ok(ControlFlow::Continue(()))
-    }
-}
-
-#[derive(Debug, thiserror::Error, Clone, PartialEq, Eq, Hash)]
-pub enum ApprovalError {
-    #[error("No user agents connected")]
-    NoUserAgentsConnected,
-}
-
-#[messages]
-impl FlowCoordinator {
-    #[message(ctx)]
-    pub async fn register_user_agent(
-        &mut self,
-        actor: ActorRef<UserAgentSession>,
-        ctx: &mut Context<Self, ()>,
-    ) {
-        info!(id = %actor.id(), actor = "FlowCoordinator", event = "useragent.connected");
-        ctx.actor_ref().link(&actor).await;
-        self.user_agents.insert(actor.id(), actor);
-    }
-
-    #[message(ctx)]
-    pub async fn register_client(
-        &mut self,
-        actor: ActorRef<ClientSession>,
-        ctx: &mut Context<Self, ()>,
-    ) {
-        info!(id = %actor.id(), actor = "FlowCoordinator", event = "client.connected");
-        ctx.actor_ref().link(&actor).await;
-        self.clients.insert(actor.id(), actor);
-    }
-
-    #[message(ctx)]
-    pub async fn request_client_approval(
-        &mut self,
-        client: ClientProfile,
-        ctx: &mut Context<Self, DelegatedReply<Result<bool, ApprovalError>>>,
-    ) -> DelegatedReply<Result<bool, ApprovalError>> {
-        let (reply, Some(reply_sender)) = ctx.reply_sender() else {
-            unreachable!("Expected `request_client_approval` to have callback channel");
-        };
-
-        let refs: Vec<_> = self.user_agents.values().cloned().collect();
-        if refs.is_empty() {
-            reply_sender.send(Err(ApprovalError::NoUserAgentsConnected));
-            return reply;
-        }
-
-        ClientApprovalController::spawn(client_connect_approval::Args {
-            client,
-            user_agents: refs,
-            reply: reply_sender,
-        });
-
-        reply
-    }
-}

server/crates/arbiter-server/src/actors/keyholder/encryption.rs

@@ -0,0 +1 @@
+pub mod v1;

server/crates/arbiter-server/src/actors/keyholder/encryption/v1.rs

@@ -1,21 +1,52 @@
 use std::ops::Deref as _;
 
-use argon2::{Algorithm, Argon2};
+use argon2::{Algorithm, Argon2, password_hash::Salt as ArgonSalt};
 use chacha20poly1305::{
     AeadInPlace, Key, KeyInit as _, XChaCha20Poly1305, XNonce,
     aead::{AeadMut, Error, Payload},
 };
 use rand::{
-    Rng as _, SeedableRng as _,
+    Rng as _, SeedableRng,
     rngs::{StdRng, SysRng},
 };
 
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
+use crate::safe_cell::{SafeCell, SafeCellHandle as _};
 
-pub mod encryption;
+pub const ROOT_KEY_TAG: &[u8] = "arbiter/seal/v1".as_bytes();
-pub mod integrity;
+pub const TAG: &[u8] = "arbiter/private-key/v1".as_bytes();
 
-use encryption::v1::{Nonce, Salt};
+pub const NONCE_LENGTH: usize = 24;
+
+#[derive(Default)]
+pub struct Nonce([u8; NONCE_LENGTH]);
+impl Nonce {
+    pub fn increment(&mut self) {
+        for i in (0..self.0.len()).rev() {
+            if self.0[i] == 0xFF {
+                self.0[i] = 0;
+            } else {
+                self.0[i] += 1;
+                break;
+            }
+        }
+    }
+
+    pub fn to_vec(&self) -> Vec<u8> {
+        self.0.to_vec()
+    }
+}
+impl<'a> TryFrom<&'a [u8]> for Nonce {
+    type Error = ();
+
+    fn try_from(value: &'a [u8]) -> Result<Self, Self::Error> {
+        if value.len() != NONCE_LENGTH {
+            return Err(());
+        }
+        let mut nonce = [0u8; NONCE_LENGTH];
+        nonce.copy_from_slice(value);
+        Ok(Self(nonce))
+    }
+}
 
 pub struct KeyCell(pub SafeCell<Key>);
 impl From<SafeCell<Key>> for KeyCell {
@@ -102,21 +133,24 @@ impl KeyCell {
     }
 }
 
+pub type Salt = [u8; ArgonSalt::RECOMMENDED_LENGTH];
+
+pub fn generate_salt() -> Salt {
+    let mut salt = Salt::default();
+    #[allow(
+        clippy::unwrap_used,
+        reason = "Rng failure is unrecoverable and should panic"
+    )]
+    let mut rng = StdRng::try_from_rng(&mut SysRng).unwrap();
+    rng.fill_bytes(&mut salt);
+    salt
+}
+
+/// User password might be of different length, have not enough entropy, etc...
 /// Derive a fixed-length key from the password using Argon2id, which is designed for password hashing and key derivation.
-pub fn derive_key(mut password: SafeCell<Vec<u8>>, salt: &Salt) -> KeyCell {
+pub fn derive_seal_key(mut password: SafeCell<Vec<u8>>, salt: &Salt) -> KeyCell {
-    let params = {
-        #[cfg(debug_assertions)]
-        {
-            argon2::Params::new(8, 1, 1, None).unwrap()
-        }
-
-        #[cfg(not(debug_assertions))]
-        {
-            argon2::Params::new(262_144, 3, 4, None).unwrap()
-        }
-    };
-
     #[allow(clippy::unwrap_used)]
+    let params = argon2::Params::new(262_144, 3, 4, None).unwrap();
     let hasher = Argon2::new(Algorithm::Argon2id, argon2::Version::V0x13, params);
     let mut key = SafeCell::new(Key::default());
     password.read_inline(|password_source| {
@@ -137,11 +171,37 @@ pub fn derive_key(mut password: SafeCell<Vec<u8>>, salt: &Salt) -> KeyCell {
 
 #[cfg(test)]
 mod tests {
-    use super::{
+    use super::*;
-        derive_key,
+    use crate::safe_cell::SafeCell;
-        encryption::v1::{Nonce, generate_salt},
+
-    };
+    #[test]
-    use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
+    pub fn derive_seal_key_deterministic() {
+        static PASSWORD: &[u8] = b"password";
+        let password = SafeCell::new(PASSWORD.to_vec());
+        let password2 = SafeCell::new(PASSWORD.to_vec());
+        let salt = generate_salt();
+
+        let mut key1 = derive_seal_key(password, &salt);
+        let mut key2 = derive_seal_key(password2, &salt);
+
+        let key1_reader = key1.0.read();
+        let key2_reader = key2.0.read();
+
+        assert_eq!(key1_reader.deref(), key2_reader.deref());
+    }
+
+    #[test]
+    pub fn successful_derive() {
+        static PASSWORD: &[u8] = b"password";
+        let password = SafeCell::new(PASSWORD.to_vec());
+        let salt = generate_salt();
+
+        let mut key = derive_seal_key(password, &salt);
+        let key_reader = key.0.read();
+        let key_ref = key_reader.deref();
+
+        assert_ne!(key_ref.as_slice(), &[0u8; 32][..]);
+    }
 
     #[test]
     pub fn encrypt_decrypt() {
@@ -149,7 +209,7 @@ mod tests {
         let password = SafeCell::new(PASSWORD.to_vec());
         let salt = generate_salt();
 
-        let mut key = derive_key(password, &salt);
+        let mut key = derive_seal_key(password, &salt);
         let nonce = Nonce(*b"unique nonce 123 1231233"); // 24 bytes for XChaCha20Poly1305
         let associated_data = b"associated data";
         let mut buffer = b"secret data".to_vec();
@@ -166,4 +226,18 @@ mod tests {
         let buffer = buffer.read();
         assert_eq!(*buffer, b"secret data");
     }
+
+    #[test]
+    // We should fuzz this
+    pub fn test_nonce_increment() {
+        let mut nonce = Nonce([0u8; NONCE_LENGTH]);
+        nonce.increment();
+
+        assert_eq!(
+            nonce.0,
+            [
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
+            ]
+        );
+    }
 }

server/crates/arbiter-server/src/actors/keyholder/mod.rs

@@ -4,22 +4,22 @@ use diesel::{
     dsl::{insert_into, update},
 };
 use diesel_async::{AsyncConnection, RunQueryDsl};
-use hmac::Mac as _;
 use kameo::{Actor, Reply, messages};
 use strum::{EnumDiscriminants, IntoDiscriminant};
 use tracing::{error, info};
 
-use crate::crypto::{
+use crate::safe_cell::SafeCell;
-    KeyCell, derive_key,
+use crate::{
-    encryption::v1::{self, Nonce},
+    db::{
-    integrity::v1::HmacSha256,
+        self,
+        models::{self, RootKeyHistory},
+        schema::{self},
+    },
+    safe_cell::SafeCellHandle as _,
 };
-use crate::db::{
+use encryption::v1::{self, KeyCell, Nonce};
-    self,
+
-    models::{self, RootKeyHistory},
+pub mod encryption;
-    schema::{self},
-};
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
 
 #[derive(Default, EnumDiscriminants)]
 #[strum_discriminants(derive(Reply), vis(pub), name(KeyHolderState))]
@@ -35,28 +35,36 @@ enum State {
     },
 }
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
 pub enum Error {
     #[error("Keyholder is already bootstrapped")]
+    #[diagnostic(code(arbiter::keyholder::already_bootstrapped))]
     AlreadyBootstrapped,
     #[error("Keyholder is not bootstrapped")]
+    #[diagnostic(code(arbiter::keyholder::not_bootstrapped))]
     NotBootstrapped,
     #[error("Invalid key provided")]
+    #[diagnostic(code(arbiter::keyholder::invalid_key))]
     InvalidKey,
 
     #[error("Requested aead entry not found")]
+    #[diagnostic(code(arbiter::keyholder::aead_not_found))]
     NotFound,
 
     #[error("Encryption error: {0}")]
+    #[diagnostic(code(arbiter::keyholder::encryption_error))]
     Encryption(#[from] chacha20poly1305::aead::Error),
 
     #[error("Database error: {0}")]
+    #[diagnostic(code(arbiter::keyholder::database_error))]
     DatabaseConnection(#[from] db::PoolError),
 
     #[error("Database transaction error: {0}")]
+    #[diagnostic(code(arbiter::keyholder::database_transaction_error))]
     DatabaseTransaction(#[from] diesel::result::Error),
 
     #[error("Broken database")]
+    #[diagnostic(code(arbiter::keyholder::broken_database))]
     BrokenDatabase,
 }
 
@@ -106,13 +114,14 @@ impl KeyHolder {
                         .first(conn)
                         .await?;
 
-                    let mut nonce = Nonce::try_from(current_nonce.as_slice()).map_err(|_| {
+                    let mut nonce =
-                        error!(
+                        v1::Nonce::try_from(current_nonce.as_slice()).map_err(|_| {
-                            "Broken database: invalid nonce for root key history id={}",
+                            error!(
-                            root_key_id
+                                "Broken database: invalid nonce for root key history id={}",
-                        );
+                                root_key_id
-                        Error::BrokenDatabase
+                            );
-                    })?;
+                            Error::BrokenDatabase
+                        })?;
                     nonce.increment();
 
                     update(schema::root_key_history::table)
@@ -135,12 +144,12 @@ impl KeyHolder {
             return Err(Error::AlreadyBootstrapped);
         }
         let salt = v1::generate_salt();
-        let mut seal_key = derive_key(seal_key_raw, &salt);
+        let mut seal_key = v1::derive_seal_key(seal_key_raw, &salt);
         let mut root_key = KeyCell::new_secure_random();
 
         // Zero nonces are fine because they are one-time
-        let root_key_nonce = Nonce::default();
+        let root_key_nonce = v1::Nonce::default();
-        let data_encryption_nonce = Nonce::default();
+        let data_encryption_nonce = v1::Nonce::default();
 
         let root_key_ciphertext: Vec<u8> = root_key.0.read_inline(|reader| {
             let root_key_reader = reader.as_slice();
@@ -205,6 +214,7 @@ impl KeyHolder {
             let mut conn = self.db.get().await?;
             schema::root_key_history::table
                 .filter(schema::root_key_history::id.eq(*root_key_history_id))
+                .select(schema::root_key_history::data_encryption_nonce)
                 .select(RootKeyHistory::as_select())
                 .first(&mut conn)
                 .await?
@@ -215,7 +225,7 @@ impl KeyHolder {
             error!("Broken database: invalid salt for root key");
             Error::BrokenDatabase
         })?;
-        let mut seal_key = derive_key(seal_key_raw, &salt);
+        let mut seal_key = v1::derive_seal_key(seal_key_raw, &salt);
 
         let mut root_key = SafeCell::new(current_key.ciphertext.clone());
 
@@ -235,7 +245,7 @@ impl KeyHolder {
 
         self.state = State::Unsealed {
             root_key_history_id: current_key.id,
-            root_key: KeyCell::try_from(root_key).map_err(|err| {
+            root_key: v1::KeyCell::try_from(root_key).map_err(|err| {
                 error!(?err, "Broken database: invalid encryption key size");
                 Error::BrokenDatabase
             })?,
@@ -246,6 +256,7 @@ impl KeyHolder {
         Ok(())
     }
 
+    // Decrypts the `aead_encrypted` entry with the given ID and returns the plaintext
     #[message]
     pub async fn decrypt(&mut self, aead_id: i32) -> Result<SafeCell<Vec<u8>>, Error> {
         let State::Unsealed { root_key, .. } = &mut self.state else {
@@ -281,7 +292,6 @@ impl KeyHolder {
         let State::Unsealed {
             root_key,
             root_key_history_id,
-            ..
         } = &mut self.state
         else {
             return Err(Error::NotBootstrapped);
@@ -319,60 +329,6 @@ impl KeyHolder {
         self.state.discriminant()
     }
 
-    #[message]
-    pub fn sign_integrity(&mut self, mac_input: Vec<u8>) -> Result<(i32, Vec<u8>), Error> {
-        let State::Unsealed {
-            root_key,
-            root_key_history_id,
-        } = &mut self.state
-        else {
-            return Err(Error::NotBootstrapped);
-        };
-
-        let mut hmac = root_key
-            .0
-            .read_inline(|k| match HmacSha256::new_from_slice(k) {
-                Ok(v) => v,
-                Err(_) => unreachable!("HMAC accepts keys of any size"),
-            });
-        hmac.update(&root_key_history_id.to_be_bytes());
-        hmac.update(&mac_input);
-
-        let mac = hmac.finalize().into_bytes().to_vec();
-        Ok((*root_key_history_id, mac))
-    }
-
-    #[message]
-    pub fn verify_integrity(
-        &mut self,
-        mac_input: Vec<u8>,
-        expected_mac: Vec<u8>,
-        key_version: i32,
-    ) -> Result<bool, Error> {
-        let State::Unsealed {
-            root_key,
-            root_key_history_id,
-        } = &mut self.state
-        else {
-            return Err(Error::NotBootstrapped);
-        };
-
-        if *root_key_history_id != key_version {
-            return Ok(false);
-        }
-
-        let mut hmac = root_key
-            .0
-            .read_inline(|k| match HmacSha256::new_from_slice(k) {
-                Ok(v) => v,
-                Err(_) => unreachable!("HMAC accepts keys of any size"),
-            });
-        hmac.update(&key_version.to_be_bytes());
-        hmac.update(&mac_input);
-
-        Ok(hmac.verify_slice(&expected_mac).is_ok())
-    }
-
     #[message]
     pub fn seal(&mut self) -> Result<(), Error> {
         let State::Unsealed {
@@ -395,8 +351,10 @@ mod tests {
 
     use diesel_async::RunQueryDsl;
 
-    use crate::db::{self};
+    use crate::{
-    use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
+        db::{self},
+        safe_cell::SafeCell,
+    };
 
     use super::*;
 

server/crates/arbiter-server/src/actors/mod.rs

@@ -1,27 +1,27 @@
 use kameo::actor::{ActorRef, Spawn};
+use miette::Diagnostic;
 use thiserror::Error;
 
 use crate::{
-    actors::{
+    actors::{bootstrap::Bootstrapper, evm::EvmActor, keyholder::KeyHolder, router::MessageRouter},
-        bootstrap::Bootstrapper, evm::EvmActor, flow_coordinator::FlowCoordinator,
-        keyholder::KeyHolder,
-    },
     db,
 };
 
 pub mod bootstrap;
 pub mod client;
 mod evm;
-pub mod flow_coordinator;
 pub mod keyholder;
+pub mod router;
 pub mod user_agent;
 
-#[derive(Error, Debug)]
+#[derive(Error, Debug, Diagnostic)]
 pub enum SpawnError {
     #[error("Failed to spawn Bootstrapper actor")]
+    #[diagnostic(code(SpawnError::Bootstrapper))]
     Bootstrapper(#[from] bootstrap::Error),
 
     #[error("Failed to spawn KeyHolder actor")]
+    #[diagnostic(code(SpawnError::KeyHolder))]
     KeyHolder(#[from] keyholder::Error),
 }
 
@@ -30,7 +30,7 @@ pub enum SpawnError {
 pub struct GlobalActors {
     pub key_holder: ActorRef<KeyHolder>,
     pub bootstrapper: ActorRef<Bootstrapper>,
-    pub flow_coordinator: ActorRef<FlowCoordinator>,
+    pub router: ActorRef<MessageRouter>,
     pub evm: ActorRef<EvmActor>,
 }
 
@@ -41,7 +41,7 @@ impl GlobalActors {
             bootstrapper: Bootstrapper::spawn(Bootstrapper::new(&db).await?),
             evm: EvmActor::spawn(EvmActor::new(key_holder.clone(), db)),
             key_holder,
-            flow_coordinator: FlowCoordinator::spawn(FlowCoordinator::default()),
+            router: MessageRouter::spawn(MessageRouter::default()),
         })
     }
 }

server/crates/arbiter-server/src/actors/router/mod.rs

@@ -0,0 +1,173 @@
+use std::{collections::HashMap, ops::ControlFlow};
+
+use ed25519_dalek::VerifyingKey;
+use kameo::{
+    Actor,
+    actor::{ActorId, ActorRef},
+    messages,
+    prelude::{ActorStopReason, Context, WeakActorRef},
+    reply::DelegatedReply,
+};
+use tokio::{sync::watch, task::JoinSet};
+use tracing::{info, warn};
+
+use crate::actors::{
+    client::session::ClientSession,
+    user_agent::session::{RequestNewClientApproval, UserAgentSession},
+};
+
+#[derive(Default)]
+pub struct MessageRouter {
+    pub user_agents: HashMap<ActorId, ActorRef<UserAgentSession>>,
+    pub clients: HashMap<ActorId, ActorRef<ClientSession>>,
+}
+
+impl Actor for MessageRouter {
+    type Args = Self;
+
+    type Error = ();
+
+    async fn on_start(args: Self::Args, _: ActorRef<Self>) -> Result<Self, Self::Error> {
+        Ok(args)
+    }
+
+    async fn on_link_died(
+        &mut self,
+        _: WeakActorRef<Self>,
+        id: ActorId,
+        _: ActorStopReason,
+    ) -> Result<ControlFlow<ActorStopReason>, Self::Error> {
+        if self.user_agents.remove(&id).is_some() {
+            info!(
+                ?id,
+                actor = "MessageRouter",
+                event = "useragent.disconnected"
+            );
+        } else if self.clients.remove(&id).is_some() {
+            info!(?id, actor = "MessageRouter", event = "client.disconnected");
+        } else {
+            info!(
+                ?id,
+                actor = "MessageRouter",
+                event = "unknown.actor.disconnected"
+            );
+        }
+        Ok(ControlFlow::Continue(()))
+    }
+}
+
+#[derive(Debug, thiserror::Error, Clone, PartialEq, Eq, Hash)]
+pub enum ApprovalError {
+    #[error("No user agents connected")]
+    NoUserAgentsConnected,
+}
+
+async fn request_client_approval(
+    user_agents: &[WeakActorRef<UserAgentSession>],
+    client_pubkey: VerifyingKey,
+) -> Result<bool, ApprovalError> {
+    if user_agents.is_empty() {
+        return Err(ApprovalError::NoUserAgentsConnected);
+    }
+
+    let mut pool = JoinSet::new();
+    let (cancel_tx, cancel_rx) = watch::channel(());
+
+    for weak_ref in user_agents {
+        match weak_ref.upgrade() {
+            Some(agent) => {
+                let cancel_rx = cancel_rx.clone();
+                pool.spawn(async move {
+                    agent
+                        .ask(RequestNewClientApproval {
+                            client_pubkey,
+                            cancel_flag: cancel_rx.clone(),
+                        })
+                        .await
+                });
+            }
+            None => {
+                warn!(
+                    id = weak_ref.id().to_string(),
+                    actor = "MessageRouter",
+                    event = "useragent.disconnected_before_approval"
+                );
+            }
+        }
+    }
+
+    while let Some(result) = pool.join_next().await {
+        match result {
+            Ok(Ok(approved)) => {
+                // cancel other pending requests
+                let _ = cancel_tx.send(());
+                return Ok(approved);
+            }
+            Ok(Err(err)) => {
+                warn!(
+                    ?err,
+                    actor = "MessageRouter",
+                    event = "useragent.approval_error"
+                );
+            }
+            Err(err) => {
+                warn!(
+                    ?err,
+                    actor = "MessageRouter",
+                    event = "useragent.approval_task_failed"
+                );
+            }
+        }
+    }
+
+    Err(ApprovalError::NoUserAgentsConnected)
+}
+
+#[messages]
+impl MessageRouter {
+    #[message(ctx)]
+    pub async fn register_user_agent(
+        &mut self,
+        actor: ActorRef<UserAgentSession>,
+        ctx: &mut Context<Self, ()>,
+    ) {
+        info!(id = %actor.id(), actor = "MessageRouter", event = "useragent.connected");
+        ctx.actor_ref().link(&actor).await;
+        self.user_agents.insert(actor.id(), actor);
+    }
+
+    #[message(ctx)]
+    pub async fn register_client(
+        &mut self,
+        actor: ActorRef<ClientSession>,
+        ctx: &mut Context<Self, ()>,
+    ) {
+        info!(id = %actor.id(), actor = "MessageRouter", event = "client.connected");
+        ctx.actor_ref().link(&actor).await;
+        self.clients.insert(actor.id(), actor);
+    }
+
+    #[message(ctx)]
+    pub async fn request_client_approval(
+        &mut self,
+        client_pubkey: VerifyingKey,
+        ctx: &mut Context<Self, DelegatedReply<Result<bool, ApprovalError>>>,
+    ) -> DelegatedReply<Result<bool, ApprovalError>> {
+        let (reply, Some(reply_sender)) = ctx.reply_sender() else {
+            unreachable!("Expected `request_client_approval` to have callback channel");
+        };
+
+        let weak_refs = self
+            .user_agents
+            .values()
+            .map(|agent| agent.downgrade())
+            .collect::<Vec<_>>();
+
+        tokio::task::spawn(async move {
+            let result = request_client_approval(&weak_refs, client_pubkey).await;
+            reply_sender.send(result);
+        });
+
+        reply
+    }
+}

server/crates/arbiter-server/src/actors/user_agent/auth.rs

@@ -1,18 +1,18 @@
-use arbiter_crypto::authn;
 use arbiter_proto::transport::Bi;
 use tracing::error;
 
 use crate::actors::user_agent::{
-    UserAgentConnection,
+    AuthPublicKey, UserAgentConnection,
     auth::state::{AuthContext, AuthStateMachine},
 };
+
 mod state;
 use state::*;
 
 #[derive(Debug, Clone)]
 pub enum Inbound {
     AuthChallengeRequest {
-        pubkey: authn::PublicKey,
+        pubkey: AuthPublicKey,
         bootstrap_token: Option<String>,
     },
     AuthChallengeSolution {
@@ -37,13 +37,6 @@ impl Error {
     }
 }
 
-impl From<diesel::result::Error> for Error {
-    fn from(e: diesel::result::Error) -> Self {
-        error!(?e, "Database error");
-        Self::internal("Database error")
-    }
-}
-
 #[derive(Debug, Clone)]
 pub enum Outbound {
     AuthChallenge { nonce: i32 },
@@ -71,7 +64,7 @@ fn parse_auth_event(payload: Inbound) -> AuthEvents {
 pub async fn authenticate<T>(
     props: &mut UserAgentConnection,
     transport: T,
-) -> Result<authn::PublicKey, Error>
+) -> Result<AuthPublicKey, Error>
 where
     T: Bi<Inbound, Result<Outbound, Error>> + Send,
 {

server/crates/arbiter-server/src/actors/user_agent/auth/state.rs

@@ -1,33 +1,29 @@
-use arbiter_crypto::authn::{self, USERAGENT_CONTEXT};
 use arbiter_proto::transport::Bi;
 use diesel::{ExpressionMethods as _, OptionalExtension as _, QueryDsl, update};
-use diesel_async::{AsyncConnection, RunQueryDsl};
+use diesel_async::RunQueryDsl;
-use kameo::actor::ActorRef;
 use tracing::error;
 
 use super::Error;
 use crate::{
     actors::{
         bootstrap::ConsumeToken,
-        keyholder::KeyHolder,
+        user_agent::{AuthPublicKey, UserAgentConnection, auth::Outbound},
-        user_agent::{UserAgentConnection, UserAgentCredentials, auth::Outbound},
     },
-    crypto::integrity,
+    db::schema,
-    db::{DatabasePool, schema::useragent_client},
 };
 
 pub struct ChallengeRequest {
-    pub pubkey: authn::PublicKey,
+    pub pubkey: AuthPublicKey,
 }
 
 pub struct BootstrapAuthRequest {
-    pub pubkey: authn::PublicKey,
+    pub pubkey: AuthPublicKey,
     pub token: String,
 }
 
 pub struct ChallengeContext {
     pub challenge_nonce: i32,
-    pub key: authn::PublicKey,
+    pub key: AuthPublicKey,
 }
 
 pub struct ChallengeSolution {
@@ -39,16 +35,12 @@ smlang::statemachine!(
     custom_error: true,
     transitions: {
         *Init + AuthRequest(ChallengeRequest) / async prepare_challenge = SentChallenge(ChallengeContext),
-        Init + BootstrapAuthRequest(BootstrapAuthRequest) / async verify_bootstrap_token = AuthOk(authn::PublicKey),
+        Init + BootstrapAuthRequest(BootstrapAuthRequest) / async verify_bootstrap_token = AuthOk(AuthPublicKey),
-        SentChallenge(ChallengeContext) + ReceivedSolution(ChallengeSolution) / async verify_solution = AuthOk(authn::PublicKey),
+        SentChallenge(ChallengeContext) + ReceivedSolution(ChallengeSolution) / async verify_solution = AuthOk(AuthPublicKey),
     }
 );
 
-/// Returns the current nonce, ready to use for the challenge nonce.
+async fn create_nonce(db: &crate::db::DatabasePool, pubkey_bytes: &[u8]) -> Result<i32, Error> {
-async fn get_current_nonce_and_id(
-    db: &DatabasePool,
-    key: &authn::PublicKey,
-) -> Result<(i32, i32), Error> {
     let mut db_conn = db.get().await.map_err(|e| {
         error!(error = ?e, "Database pool error");
         Error::internal("Database unavailable")
@@ -56,11 +48,19 @@ async fn get_current_nonce_and_id(
     db_conn
         .exclusive_transaction(|conn| {
             Box::pin(async move {
-                useragent_client::table
+                let current_nonce = schema::useragent_client::table
-                    .filter(useragent_client::public_key.eq(key.to_bytes()))
+                    .filter(schema::useragent_client::public_key.eq(pubkey_bytes.to_vec()))
-                    .select((useragent_client::id, useragent_client::nonce))
+                    .select(schema::useragent_client::nonce)
-                    .first::<(i32, i32)>(conn)
+                    .first::<i32>(conn)
-                    .await
+                    .await?;
+
+                update(schema::useragent_client::table)
+                    .filter(schema::useragent_client::public_key.eq(pubkey_bytes.to_vec()))
+                    .set(schema::useragent_client::nonce.eq(current_nonce + 1))
+                    .execute(conn)
+                    .await?;
+
+                Result::<_, diesel::result::Error>::Ok(current_nonce)
             })
         })
         .await
@@ -70,130 +70,31 @@ async fn get_current_nonce_and_id(
             Error::internal("Database operation failed")
         })?
         .ok_or_else(|| {
-            error!(?key, "Public key not found in database");
+            error!(?pubkey_bytes, "Public key not found in database");
             Error::UnregisteredPublicKey
         })
 }
 
-async fn verify_integrity(
+async fn register_key(db: &crate::db::DatabasePool, pubkey: &AuthPublicKey) -> Result<(), Error> {
-    db: &DatabasePool,
+    let pubkey_bytes = pubkey.to_stored_bytes();
-    keyholder: &ActorRef<KeyHolder>,
+    let key_type = pubkey.key_type();
-    pubkey: &authn::PublicKey,
-) -> Result<(), Error> {
-    let mut db_conn = db.get().await.map_err(|e| {
-        error!(error = ?e, "Database pool error");
-        Error::internal("Database unavailable")
-    })?;
-
-    let (id, nonce) = get_current_nonce_and_id(db, pubkey).await?;
-
-    let _result = integrity::verify_entity(
-        &mut db_conn,
-        keyholder,
-        &UserAgentCredentials {
-            pubkey: pubkey.clone(),
-            nonce,
-        },
-        id,
-    )
-    .await
-    .map_err(|e| {
-        error!(?e, "Integrity verification failed");
-        Error::internal("Integrity verification failed")
-    })?;
-
-    Ok(())
-}
-
-async fn create_nonce(
-    db: &DatabasePool,
-    keyholder: &ActorRef<KeyHolder>,
-    pubkey: &authn::PublicKey,
-) -> Result<i32, Error> {
-    let mut db_conn = db.get().await.map_err(|e| {
-        error!(error = ?e, "Database pool error");
-        Error::internal("Database unavailable")
-    })?;
-    let new_nonce = db_conn
-        .exclusive_transaction(|conn| {
-            Box::pin(async move {
-                let (id, new_nonce): (i32, i32) = update(useragent_client::table)
-                    .filter(useragent_client::public_key.eq(pubkey.to_bytes()))
-                    .set(useragent_client::nonce.eq(useragent_client::nonce + 1))
-                    .returning((useragent_client::id, useragent_client::nonce))
-                    .get_result(conn)
-                    .await
-                    .map_err(|e| {
-                        error!(error = ?e, "Database error");
-                        Error::internal("Database operation failed")
-                    })?;
-
-                integrity::sign_entity(
-                    conn,
-                    keyholder,
-                    &UserAgentCredentials {
-                        pubkey: pubkey.clone(),
-                        nonce: new_nonce,
-                    },
-                    id,
-                )
-                .await
-                .map_err(|e| {
-                    error!(?e, "Integrity signature update failed");
-                    Error::internal("Database error")
-                })?;
-
-                Result::<_, Error>::Ok(new_nonce)
-            })
-        })
-        .await?;
-    Ok(new_nonce)
-}
-
-async fn register_key(
-    db: &DatabasePool,
-    keyholder: &ActorRef<KeyHolder>,
-    pubkey: &authn::PublicKey,
-) -> Result<(), Error> {
-    let pubkey_bytes = pubkey.to_bytes();
     let mut conn = db.get().await.map_err(|e| {
         error!(error = ?e, "Database pool error");
         Error::internal("Database unavailable")
     })?;
 
-    conn.transaction(|conn| {
+    diesel::insert_into(schema::useragent_client::table)
-        Box::pin(async move {
+        .values((
-            const NONCE_START: i32 = 1;
+            schema::useragent_client::public_key.eq(pubkey_bytes),
-
+            schema::useragent_client::nonce.eq(1),
-            let id: i32 = diesel::insert_into(useragent_client::table)
+            schema::useragent_client::key_type.eq(key_type),
-                .values((
+        ))
-                    useragent_client::public_key.eq(pubkey_bytes),
+        .execute(&mut conn)
-                    useragent_client::nonce.eq(NONCE_START),
+        .await
-                ))
+        .map_err(|e| {
-                .returning(useragent_client::id)
+            error!(error = ?e, "Database error");
-                .get_result(conn)
+            Error::internal("Database operation failed")
-                .await
+        })?;
-                .map_err(|e| {
-                    error!(error = ?e, "Database error");
-                    Error::internal("Database operation failed")
-                })?;
-
-            let entity = UserAgentCredentials {
-                pubkey: pubkey.clone(),
-                nonce: NONCE_START,
-            };
-
-            integrity::sign_entity(conn, keyholder, &entity, id)
-                .await
-                .map_err(|e| {
-                    error!(error = ?e, "Failed to sign integrity tag for new user-agent key");
-                    Error::internal("Failed to register public key")
-                })?;
-
-            Result::<_, Error>::Ok(())
-        })
-    })
-    .await?;
 
     Ok(())
 }
@@ -219,9 +120,8 @@ where
         &mut self,
         ChallengeRequest { pubkey }: ChallengeRequest,
     ) -> Result<ChallengeContext, Self::Error> {
-        verify_integrity(&self.conn.db, &self.conn.actors.key_holder, &pubkey).await?;
+        let stored_bytes = pubkey.to_stored_bytes();
-
+        let nonce = create_nonce(&self.conn.db, &stored_bytes).await?;
-        let nonce = create_nonce(&self.conn.db, &self.conn.actors.key_holder, &pubkey).await?;
 
         self.transport
             .send(Ok(Outbound::AuthChallenge { nonce }))
@@ -242,7 +142,7 @@ where
     async fn verify_bootstrap_token(
         &mut self,
         BootstrapAuthRequest { pubkey, token }: BootstrapAuthRequest,
-    ) -> Result<authn::PublicKey, Self::Error> {
+    ) -> Result<AuthPublicKey, Self::Error> {
         let token_ok: bool = self
             .conn
             .actors
@@ -261,24 +161,14 @@ where
             return Err(Error::InvalidBootstrapToken);
         }
 
-        match token_ok {
+        register_key(&self.conn.db, &pubkey).await?;
-            true => {
+
-                register_key(&self.conn.db, &self.conn.actors.key_holder, &pubkey).await?;
+        self.transport
-                self.transport
+            .send(Ok(Outbound::AuthSuccess))
-                    .send(Ok(Outbound::AuthSuccess))
+            .await
-                    .await
+            .map_err(|_| Error::Transport)?;
-                    .map_err(|_| Error::Transport)?;
+
-                Ok(pubkey)
+        Ok(pubkey)
-            }
-            false => {
-                error!("Invalid bootstrap token provided");
-                self.transport
-                    .send(Err(Error::InvalidBootstrapToken))
-                    .await
-                    .map_err(|_| Error::Transport)?;
-                Err(Error::InvalidBootstrapToken)
-            }
-        }
     }
 
     #[allow(missing_docs)]
@@ -290,29 +180,43 @@ where
             key,
         }: &ChallengeContext,
         ChallengeSolution { solution }: ChallengeSolution,
-    ) -> Result<authn::PublicKey, Self::Error> {
+    ) -> Result<AuthPublicKey, Self::Error> {
-        let signature = authn::Signature::try_from(solution.as_slice()).map_err(|_| {
+        let formatted = arbiter_proto::format_challenge(*challenge_nonce, &key.to_stored_bytes());
-            error!("Failed to decode signature in challenge solution");
-            Error::InvalidChallengeSolution
-        })?;
 
-        let valid = key.verify(*challenge_nonce, USERAGENT_CONTEXT, &signature);
+        let valid = match key {
+            AuthPublicKey::Ed25519(vk) => {
+                let sig = solution.as_slice().try_into().map_err(|_| {
+                    error!(?solution, "Invalid Ed25519 signature length");
+                    Error::InvalidChallengeSolution
+                })?;
+                vk.verify_strict(&formatted, &sig).is_ok()
+            }
+            AuthPublicKey::EcdsaSecp256k1(vk) => {
+                use k256::ecdsa::signature::Verifier as _;
+                let sig = k256::ecdsa::Signature::try_from(solution.as_slice()).map_err(|_| {
+                    error!(?solution, "Invalid ECDSA signature bytes");
+                    Error::InvalidChallengeSolution
+                })?;
+                vk.verify(&formatted, &sig).is_ok()
+            }
+            AuthPublicKey::Rsa(pk) => {
+                use rsa::signature::Verifier as _;
+                let verifying_key = rsa::pss::VerifyingKey::<sha2::Sha256>::new(pk.clone());
+                let sig = rsa::pss::Signature::try_from(solution.as_slice()).map_err(|_| {
+                    error!(?solution, "Invalid RSA signature bytes");
+                    Error::InvalidChallengeSolution
+                })?;
+                verifying_key.verify(&formatted, &sig).is_ok()
+            }
+        };
 
-        match valid {
+        if valid {
-            true => {
+            self.transport
-                self.transport
+                .send(Ok(Outbound::AuthSuccess))
-                    .send(Ok(Outbound::AuthSuccess))
+                .await
-                    .await
+                .map_err(|_| Error::Transport)?;
-                    .map_err(|_| Error::Transport)?;
-                Ok(key.clone())
-            }
-            false => {
-                self.transport
-                    .send(Err(Error::InvalidChallengeSolution))
-                    .await
-                    .map_err(|_| Error::Transport)?;
-                Err(Error::InvalidChallengeSolution)
-            }
         }
+
+        Ok(key.clone())
     }
 }

server/crates/arbiter-server/src/actors/user_agent/mod.rs

@@ -1,25 +1,79 @@
 use crate::{
-    actors::{GlobalActors, client::ClientProfile},
+    actors::GlobalActors,
-    crypto::integrity::Integrable,
+    db::{self, models::KeyType},
-    db,
 };
-use arbiter_crypto::authn;
 
-#[derive(Debug, arbiter_macros::Hashable)]
+/// Abstraction over Ed25519 / ECDSA-secp256k1 / RSA public keys used during the auth handshake.
-pub struct UserAgentCredentials {
+#[derive(Clone, Debug)]
-    pub pubkey: authn::PublicKey,
+pub enum AuthPublicKey {
-    pub nonce: i32,
+    Ed25519(ed25519_dalek::VerifyingKey),
+    /// Compressed SEC1 public key; signature bytes are raw 64-byte (r||s).
+    EcdsaSecp256k1(k256::ecdsa::VerifyingKey),
+    /// RSA-2048+ public key (Windows Hello / KeyCredentialManager); signature bytes are PSS+SHA-256.
+    Rsa(rsa::RsaPublicKey),
 }
 
-impl Integrable for UserAgentCredentials {
+impl AuthPublicKey {
-    const KIND: &'static str = "useragent_credentials";
+    /// Canonical bytes stored in DB and echoed back in the challenge.
+    /// Ed25519: raw 32 bytes. ECDSA: SEC1 compressed 33 bytes. RSA: DER-encoded SPKI.
+    pub fn to_stored_bytes(&self) -> Vec<u8> {
+        match self {
+            AuthPublicKey::Ed25519(k) => k.to_bytes().to_vec(),
+            // SEC1 compressed (33 bytes) is the natural compact format for secp256k1
+            AuthPublicKey::EcdsaSecp256k1(k) => k.to_encoded_point(true).as_bytes().to_vec(),
+            AuthPublicKey::Rsa(k) => {
+                use rsa::pkcs8::EncodePublicKey as _;
+                #[allow(clippy::expect_used)]
+                k.to_public_key_der()
+                    .expect("rsa SPKI encoding is infallible")
+                    .to_vec()
+            }
+        }
+    }
+
+    pub fn key_type(&self) -> KeyType {
+        match self {
+            AuthPublicKey::Ed25519(_) => KeyType::Ed25519,
+            AuthPublicKey::EcdsaSecp256k1(_) => KeyType::EcdsaSecp256k1,
+            AuthPublicKey::Rsa(_) => KeyType::Rsa,
+        }
+    }
+}
+
+impl TryFrom<(KeyType, Vec<u8>)> for AuthPublicKey {
+    type Error = &'static str;
+
+    fn try_from(value: (KeyType, Vec<u8>)) -> Result<Self, Self::Error> {
+        let (key_type, bytes) = value;
+        match key_type {
+            KeyType::Ed25519 => {
+                let bytes: [u8; 32] = bytes.try_into().map_err(|_| "invalid Ed25519 key length")?;
+                let key = ed25519_dalek::VerifyingKey::from_bytes(&bytes)
+                    .map_err(|_e| "invalid Ed25519 key")?;
+                Ok(AuthPublicKey::Ed25519(key))
+            }
+            KeyType::EcdsaSecp256k1 => {
+                let point =
+                    k256::EncodedPoint::from_bytes(&bytes).map_err(|_e| "invalid ECDSA key")?;
+                let key = k256::ecdsa::VerifyingKey::from_encoded_point(&point)
+                    .map_err(|_e| "invalid ECDSA key")?;
+                Ok(AuthPublicKey::EcdsaSecp256k1(key))
+            }
+            KeyType::Rsa => {
+                use rsa::pkcs8::DecodePublicKey as _;
+                let key = rsa::RsaPublicKey::from_public_key_der(&bytes)
+                    .map_err(|_e| "invalid RSA key")?;
+                Ok(AuthPublicKey::Rsa(key))
+            }
+        }
+    }
 }
 
 // Messages, sent by user agent to connection client without having a request
 #[derive(Debug)]
 pub enum OutOfBand {
-    ClientConnectionRequest { profile: ClientProfile },
+    ClientConnectionRequest { pubkey: ed25519_dalek::VerifyingKey },
-    ClientConnectionCancel { pubkey: authn::PublicKey },
+    ClientConnectionCancel,
 }
 
 pub struct UserAgentConnection {

server/crates/arbiter-server/src/actors/user_agent/session.rs

@@ -1,18 +1,18 @@
-use arbiter_crypto::authn;
+use std::borrow::Cow;
-
-use std::{borrow::Cow, collections::HashMap};
 
 use arbiter_proto::transport::Sender;
 use async_trait::async_trait;
-use kameo::{Actor, actor::ActorRef, messages};
+use ed25519_dalek::VerifyingKey;
+use kameo::{Actor, messages};
 use thiserror::Error;
+use tokio::sync::watch;
 use tracing::error;
 
 use crate::actors::{
-    client::ClientProfile,
+    router::RegisterUserAgent,
-    flow_coordinator::{RegisterUserAgent, client_connect_approval::ClientApprovalController},
     user_agent::{OutOfBand, UserAgentConnection},
 };
+
 mod state;
 use state::{DummyContext, UserAgentEvents, UserAgentStateMachine};
 
@@ -25,19 +25,6 @@ pub enum Error {
     Internal { message: Cow<'static, str> },
 }
 
-impl From<crate::db::PoolError> for Error {
-    fn from(err: crate::db::PoolError) -> Self {
-        error!(?err, "Database pool error");
-        Self::internal("Database pool error")
-    }
-}
-impl From<diesel::result::Error> for Error {
-    fn from(err: diesel::result::Error) -> Self {
-        error!(?err, "Database error");
-        Self::internal("Database error")
-    }
-}
-
 impl Error {
     pub fn internal(message: impl Into<Cow<'static, str>>) -> Self {
         Self::Internal {
@@ -46,20 +33,19 @@ impl Error {
     }
 }
 
-pub struct PendingClientApproval {
-    pubkey: authn::PublicKey,
-    controller: ActorRef<ClientApprovalController>,
-}
-
 pub struct UserAgentSession {
     props: UserAgentConnection,
     state: UserAgentStateMachine<DummyContext>,
+    #[allow(dead_code, reason = "The session keeps ownership of the outbound transport even before the state-machine flow starts using it directly")]
     sender: Box<dyn Sender<OutOfBand>>,
-
-    pending_client_approvals: HashMap<Vec<u8>, PendingClientApproval>,
 }
 
-pub mod connection;
+mod connection;
+pub(crate) use connection::{
+    BootstrapError, HandleBootstrapEncryptedKey, HandleEvmWalletCreate, HandleEvmWalletList,
+    HandleGrantCreate, HandleGrantDelete, HandleGrantList, HandleQueryVaultState,
+};
+pub use connection::{HandleUnsealEncryptedKey, HandleUnsealRequest, UnsealError};
 
 impl UserAgentSession {
     pub(crate) fn new(props: UserAgentConnection, sender: Box<dyn Sender<OutOfBand>>) -> Self {
@@ -67,7 +53,6 @@ impl UserAgentSession {
             props,
             state: UserAgentStateMachine::new(DummyContext),
             sender,
-            pending_client_approvals: Default::default(),
         }
     }
 
@@ -99,33 +84,26 @@ impl UserAgentSession {
 #[messages]
 impl UserAgentSession {
     #[message]
-    pub async fn begin_new_client_approval(
+    pub async fn request_new_client_approval(
         &mut self,
-        client: ClientProfile,
+        client_pubkey: VerifyingKey,
-        controller: ActorRef<ClientApprovalController>,
+        mut cancel_flag: watch::Receiver<()>,
-    ) {
+    ) -> Result<bool, ()> {
-        if let Err(e) = self
+        if self
             .sender
             .send(OutOfBand::ClientConnectionRequest {
-                profile: client.clone(),
+                pubkey: client_pubkey,
             })
             .await
+            .is_err()
         {
-            error!(
+            return Err(());
-                ?e,
-                actor = "user_agent",
-                event = "failed to announce new client connection"
-            );
-            return;
         }
 
-        self.pending_client_approvals.insert(
+        let _ = cancel_flag.changed().await;
-            client.pubkey.to_bytes(),
+
-            PendingClientApproval {
+        let _ = self.sender.send(OutOfBand::ClientConnectionCancel).await;
-                pubkey: client.pubkey,
+        Ok(false)
-                controller,
-            },
-        );
     }
 }
 
@@ -140,52 +118,15 @@ impl Actor for UserAgentSession {
     ) -> Result<Self, Self::Error> {
         args.props
             .actors
-            .flow_coordinator
+            .router
             .ask(RegisterUserAgent {
                 actor: this.clone(),
             })
             .await
             .map_err(|err| {
-                error!(
+                error!(?err, "Failed to register user agent connection with router");
-                    ?err,
+                Error::internal("Failed to register user agent connection with router")
-                    "Failed to register user agent connection with flow coordinator"
-                );
-                Error::internal("Failed to register user agent connection with flow coordinator")
             })?;
         Ok(args)
     }
-
-    async fn on_link_died(
-        &mut self,
-        _: kameo::prelude::WeakActorRef<Self>,
-        id: kameo::prelude::ActorId,
-        _: kameo::prelude::ActorStopReason,
-    ) -> Result<std::ops::ControlFlow<kameo::prelude::ActorStopReason>, Self::Error> {
-        let cancelled_pubkey = self
-            .pending_client_approvals
-            .iter()
-            .find_map(|(k, v)| (v.controller.id() == id).then_some(k.clone()));
-
-        if let Some(pubkey_bytes) = cancelled_pubkey {
-            let Some(approval) = self.pending_client_approvals.remove(&pubkey_bytes) else {
-                return Ok(std::ops::ControlFlow::Continue(()));
-            };
-
-            if let Err(e) = self
-                .sender
-                .send(OutOfBand::ClientConnectionCancel {
-                    pubkey: approval.pubkey,
-                })
-                .await
-            {
-                error!(
-                    ?e,
-                    actor = "user_agent",
-                    event = "failed to announce client connection cancellation"
-                );
-            }
-        }
-
-        Ok(std::ops::ControlFlow::Continue(()))
-    }
 }

server/crates/arbiter-server/src/actors/user_agent/session/connection.rs

@@ -1,37 +1,29 @@
 use std::sync::Mutex;
 
-use alloy::{consensus::TxEip1559, primitives::Address, signers::Signature};
+use alloy::primitives::Address;
-use arbiter_crypto::{
-    authn,
-    safecell::{SafeCell, SafeCellHandle as _},
-};
 use chacha20poly1305::{AeadInPlace, XChaCha20Poly1305, XNonce, aead::KeyInit};
-use diesel::{ExpressionMethods as _, QueryDsl as _, SelectableHelper};
-use diesel_async::{AsyncConnection, RunQueryDsl};
 use kameo::error::SendError;
 use kameo::messages;
-use kameo::prelude::Context;
 use tracing::{error, info};
 use x25519_dalek::{EphemeralSecret, PublicKey};
 
-use crate::actors::flow_coordinator::client_connect_approval::ClientApprovalAnswer;
 use crate::actors::keyholder::KeyHolderState;
 use crate::actors::user_agent::session::Error;
-use crate::actors::{
-    evm::{
-        ClientSignTransaction, Generate, ListWallets, SignTransactionError as EvmSignError,
-        UseragentCreateGrant, UseragentListGrants,
-    },
-    keyholder::{self, Bootstrap, TryUnseal},
-    user_agent::session::{
-        UserAgentSession,
-        state::{UnsealContext, UserAgentEvents, UserAgentStates},
-    },
-};
-use crate::db::models::{
-    EvmWalletAccess, NewEvmWalletAccess, ProgramClient, ProgramClientMetadata,
-};
 use crate::evm::policies::{Grant, SpecificGrant};
+use crate::safe_cell::SafeCell;
+use crate::{
+    actors::{
+        evm::{
+            Generate, ListWallets, UseragentCreateGrant, UseragentDeleteGrant, UseragentListGrants,
+        },
+        keyholder::{self, Bootstrap, TryUnseal},
+        user_agent::session::{
+                UserAgentSession,
+                state::{UnsealContext, UserAgentEvents, UserAgentStates},
+            },
+    },
+    safe_cell::SafeCellHandle as _,
+};
 
 impl UserAgentSession {
     fn take_unseal_secret(&mut self) -> Result<(EphemeralSecret, PublicKey), Error> {
@@ -111,24 +103,6 @@ pub enum BootstrapError {
     General(#[from] super::Error),
 }
 
-#[derive(Debug, Error)]
-pub enum SignTransactionError {
-    #[error("Policy evaluation failed")]
-    Vet(#[from] crate::evm::VetError),
-
-    #[error("Internal signing error")]
-    Internal,
-}
-
-#[derive(Debug, Error)]
-pub enum GrantMutationError {
-    #[error("Vault is sealed")]
-    VaultSealed,
-
-    #[error("Internal grant mutation error")]
-    Internal,
-}
-
 #[messages]
 impl UserAgentSession {
     #[message]
@@ -297,7 +271,7 @@ impl UserAgentSession {
 #[messages]
 impl UserAgentSession {
     #[message]
-    pub(crate) async fn handle_evm_wallet_create(&mut self) -> Result<(i32, Address), Error> {
+    pub(crate) async fn handle_evm_wallet_create(&mut self) -> Result<Address, Error> {
         match self.props.actors.evm.ask(Generate {}).await {
             Ok(address) => Ok(address),
             Err(SendError::HandlerError(err)) => Err(Error::internal(format!(
@@ -311,7 +285,7 @@ impl UserAgentSession {
     }
 
     #[message]
-    pub(crate) async fn handle_evm_wallet_list(&mut self) -> Result<Vec<(i32, Address)>, Error> {
+    pub(crate) async fn handle_evm_wallet_list(&mut self) -> Result<Vec<Address>, Error> {
         match self.props.actors.evm.ask(ListWallets {}).await {
             Ok(wallets) => Ok(wallets),
             Err(err) => {
@@ -338,187 +312,43 @@ impl UserAgentSession {
     #[message]
     pub(crate) async fn handle_grant_create(
         &mut self,
+        client_id: i32,
         basic: crate::evm::policies::SharedGrantSettings,
         grant: crate::evm::policies::SpecificGrant,
-    ) -> Result<i32, GrantMutationError> {
+    ) -> Result<i32, Error> {
         match self
             .props
             .actors
             .evm
-            .ask(UseragentCreateGrant { basic, grant })
+            .ask(UseragentCreateGrant {
+                client_id,
+                basic,
+                grant,
+            })
             .await
         {
             Ok(grant_id) => Ok(grant_id),
             Err(err) => {
                 error!(?err, "EVM grant create failed");
-                Err(GrantMutationError::Internal)
+                Err(Error::internal("Failed to create EVM grant"))
             }
         }
     }
 
     #[message]
-    pub(crate) async fn handle_grant_delete(
+    pub(crate) async fn handle_grant_delete(&mut self, grant_id: i32) -> Result<(), Error> {
-        &mut self,
-        grant_id: i32,
-    ) -> Result<(), GrantMutationError> {
-        // match self
-        //     .props
-        //     .actors
-        //     .evm
-        //     .ask(UseragentDeleteGrant { grant_id })
-        //     .await
-        // {
-        //     Ok(()) => Ok(()),
-        //     Err(err) => {
-        //         error!(?err, "EVM grant delete failed");
-        //         Err(GrantMutationError::Internal)
-        //     }
-        // }
-       let _ = grant_id;
-        todo!()
-    }
-
-    #[message]
-    pub(crate) async fn handle_sign_transaction(
-        &mut self,
-        client_id: i32,
-        wallet_address: Address,
-        transaction: TxEip1559,
-    ) -> Result<Signature, SignTransactionError> {
         match self
             .props
             .actors
             .evm
-            .ask(ClientSignTransaction {
+            .ask(UseragentDeleteGrant { grant_id })
-                client_id,
-                wallet_address,
-                transaction,
-            })
             .await
         {
-            Ok(signature) => Ok(signature),
+            Ok(()) => Ok(()),
-            Err(SendError::HandlerError(EvmSignError::Vet(vet_error))) => {
-                Err(SignTransactionError::Vet(vet_error))
-            }
             Err(err) => {
-                error!(?err, "EVM sign transaction failed in user-agent session");
+                error!(?err, "EVM grant delete failed");
-                Err(SignTransactionError::Internal)
+                Err(Error::internal("Failed to delete EVM grant"))
             }
         }
     }
-
-    #[message]
-    pub(crate) async fn handle_grant_evm_wallet_access(
-        &mut self,
-        entries: Vec<NewEvmWalletAccess>,
-    ) -> Result<(), Error> {
-        let mut conn = self.props.db.get().await?;
-        conn.transaction(|conn| {
-            Box::pin(async move {
-                use crate::db::schema::evm_wallet_access;
-
-                for entry in entries {
-                    diesel::insert_into(evm_wallet_access::table)
-                        .values(&entry)
-                        .on_conflict_do_nothing()
-                        .execute(conn)
-                        .await?;
-                }
-
-                Result::<_, Error>::Ok(())
-            })
-        })
-        .await?;
-        Ok(())
-    }
-
-    #[message]
-    pub(crate) async fn handle_revoke_evm_wallet_access(
-        &mut self,
-        entries: Vec<i32>,
-    ) -> Result<(), Error> {
-        let mut conn = self.props.db.get().await?;
-        conn.transaction(|conn| {
-            Box::pin(async move {
-                use crate::db::schema::evm_wallet_access;
-                for entry in entries {
-                    diesel::delete(evm_wallet_access::table)
-                        .filter(evm_wallet_access::wallet_id.eq(entry))
-                        .execute(conn)
-                        .await?;
-                }
-
-                Result::<_, Error>::Ok(())
-            })
-        })
-        .await?;
-        Ok(())
-    }
-
-    #[message]
-    pub(crate) async fn handle_list_wallet_access(
-        &mut self,
-    ) -> Result<Vec<EvmWalletAccess>, Error> {
-        let mut conn = self.props.db.get().await?;
-        use crate::db::schema::evm_wallet_access;
-        let access_entries = evm_wallet_access::table
-            .select(EvmWalletAccess::as_select())
-            .load::<_>(&mut conn)
-            .await?;
-        Ok(access_entries)
-    }
-}
-
-#[messages]
-impl UserAgentSession {
-    #[message(ctx)]
-    pub(crate) async fn handle_new_client_approve(
-        &mut self,
-        approved: bool,
-        pubkey: authn::PublicKey,
-        ctx: &mut Context<Self, Result<(), Error>>,
-    ) -> Result<(), Error> {
-        let pending_approval = match self.pending_client_approvals.remove(&pubkey.to_bytes()) {
-            Some(approval) => approval,
-            None => {
-                error!("Received client connection response for unknown client");
-                return Err(Error::internal("Unknown client in connection response"));
-            }
-        };
-
-        pending_approval
-            .controller
-            .tell(ClientApprovalAnswer { approved })
-            .await
-            .map_err(|err| {
-                error!(
-                    ?err,
-                    "Failed to send client approval response to controller"
-                );
-                Error::internal("Failed to send client approval response to controller")
-            })?;
-
-        ctx.actor_ref().unlink(&pending_approval.controller).await;
-
-        Ok(())
-    }
-
-    #[message]
-    pub(crate) async fn handle_sdk_client_list(
-        &mut self,
-    ) -> Result<Vec<(ProgramClient, ProgramClientMetadata)>, Error> {
-        use crate::db::schema::{client_metadata, program_client};
-        let mut conn = self.props.db.get().await?;
-
-        let clients = program_client::table
-            .inner_join(client_metadata::table)
-            .select((
-                ProgramClient::as_select(),
-                ProgramClientMetadata::as_select(),
-            ))
-            .load::<(ProgramClient, ProgramClientMetadata)>(&mut conn)
-            .await?;
-
-        Ok(clients)
-    }
 }

server/crates/arbiter-server/src/context/mod.rs

@@ -1,5 +1,6 @@
 use std::sync::Arc;
 
+use miette::Diagnostic;
 use thiserror::Error;
 
 use crate::{
@@ -10,24 +11,30 @@ use crate::{
 
 pub mod tls;
 
-#[derive(Error, Debug)]
+#[derive(Error, Debug, Diagnostic)]
 pub enum InitError {
     #[error("Database setup failed: {0}")]
+    #[diagnostic(code(arbiter_server::init::database_setup))]
     DatabaseSetup(#[from] db::DatabaseSetupError),
 
     #[error("Connection acquire failed: {0}")]
+    #[diagnostic(code(arbiter_server::init::database_pool))]
     DatabasePool(#[from] db::PoolError),
 
     #[error("Database query error: {0}")]
+    #[diagnostic(code(arbiter_server::init::database_query))]
     DatabaseQuery(#[from] diesel::result::Error),
 
     #[error("TLS initialization failed: {0}")]
+    #[diagnostic(code(arbiter_server::init::tls_init))]
     Tls(#[from] tls::InitError),
 
     #[error("Actor spawn failed: {0}")]
+    #[diagnostic(code(arbiter_server::init::actor_spawn))]
     ActorSpawn(#[from] crate::actors::SpawnError),
 
     #[error("I/O Error: {0}")]
+    #[diagnostic(code(arbiter_server::init::io))]
     Io(#[from] std::io::Error),
 }
 

server/crates/arbiter-server/src/context/tls.rs

@@ -1,12 +1,12 @@
-use std::{net::Ipv4Addr, string::FromUtf8Error};
+use std::string::FromUtf8Error;
 
 use diesel::{ExpressionMethods as _, QueryDsl, SelectableHelper as _};
 use diesel_async::{AsyncConnection, RunQueryDsl};
-
+use miette::Diagnostic;
 use pem::Pem;
 use rcgen::{
     BasicConstraints, Certificate, CertificateParams, CertifiedIssuer, DistinguishedName, DnType,
-    IsCa, Issuer, KeyPair, KeyUsagePurpose, SanType,
+    IsCa, Issuer, KeyPair, KeyUsagePurpose,
 };
 use rustls::pki_types::pem::PemObject;
 use thiserror::Error;
@@ -29,24 +29,30 @@ const ENCODE_CONFIG: pem::EncodeConfig = {
     pem::EncodeConfig::new().set_line_ending(line_ending)
 };
 
-#[derive(Error, Debug)]
+#[derive(Error, Debug, Diagnostic)]
 pub enum InitError {
     #[error("Key generation error during TLS initialization: {0}")]
+    #[diagnostic(code(arbiter_server::tls_init::key_generation))]
     KeyGeneration(#[from] rcgen::Error),
 
     #[error("Key invalid format: {0}")]
+    #[diagnostic(code(arbiter_server::tls_init::key_invalid_format))]
     KeyInvalidFormat(#[from] FromUtf8Error),
 
     #[error("Key deserialization error: {0}")]
+    #[diagnostic(code(arbiter_server::tls_init::key_deserialization))]
     KeyDeserializationError(rcgen::Error),
 
     #[error("Database error during TLS initialization: {0}")]
+    #[diagnostic(code(arbiter_server::tls_init::database_error))]
     DatabaseError(#[from] diesel::result::Error),
 
     #[error("Pem deserialization error during TLS initialization: {0}")]
+    #[diagnostic(code(arbiter_server::tls_init::pem_deserialization))]
     PemDeserializationError(#[from] rustls::pki_types::pem::Error),
 
     #[error("Database pool acquire error during TLS initialization: {0}")]
+    #[diagnostic(code(arbiter_server::tls_init::database_pool_acquire))]
     DatabasePoolAcquire(#[from] db::PoolError),
 }
 
@@ -108,9 +114,6 @@ impl TlsCa {
             KeyUsagePurpose::DigitalSignature,
             KeyUsagePurpose::KeyEncipherment,
         ];
-        params
-            .subject_alt_names
-            .push(SanType::IpAddress(Ipv4Addr::LOCALHOST.into()));
 
         let mut dn = DistinguishedName::new();
         dn.push(DnType::CommonName, "Arbiter Instance Leaf");

server/crates/arbiter-server/src/crypto/encryption/mod.rs

@@ -1,3 +0,0 @@
-pub mod v1;
-
-pub use v1::*;

server/crates/arbiter-server/src/crypto/encryption/v1.rs

@@ -1,107 +0,0 @@
-use argon2::password_hash::Salt as ArgonSalt;
-
-use rand::{
-    Rng as _, SeedableRng,
-    rngs::{StdRng, SysRng},
-};
-
-pub const ROOT_KEY_TAG: &[u8] = "arbiter/seal/v1".as_bytes();
-pub const TAG: &[u8] = "arbiter/private-key/v1".as_bytes();
-
-pub const NONCE_LENGTH: usize = 24;
-
-#[derive(Default)]
-pub struct Nonce(pub [u8; NONCE_LENGTH]);
-impl Nonce {
-    pub fn increment(&mut self) {
-        for i in (0..self.0.len()).rev() {
-            if self.0[i] == 0xFF {
-                self.0[i] = 0;
-            } else {
-                self.0[i] += 1;
-                break;
-            }
-        }
-    }
-
-    pub fn to_vec(&self) -> Vec<u8> {
-        self.0.to_vec()
-    }
-}
-impl<'a> TryFrom<&'a [u8]> for Nonce {
-    type Error = ();
-
-    fn try_from(value: &'a [u8]) -> Result<Self, Self::Error> {
-        if value.len() != NONCE_LENGTH {
-            return Err(());
-        }
-        let mut nonce = [0u8; NONCE_LENGTH];
-        nonce.copy_from_slice(value);
-        Ok(Self(nonce))
-    }
-}
-
-pub type Salt = [u8; ArgonSalt::RECOMMENDED_LENGTH];
-
-pub fn generate_salt() -> Salt {
-    let mut salt = Salt::default();
-    #[allow(
-        clippy::unwrap_used,
-        reason = "Rng failure is unrecoverable and should panic"
-    )]
-    let mut rng = StdRng::try_from_rng(&mut SysRng).unwrap();
-    rng.fill_bytes(&mut salt);
-    salt
-}
-
-#[cfg(test)]
-mod tests {
-    use std::ops::Deref as _;
-
-    use super::*;
-    use crate::crypto::derive_key;
-    use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
-
-    #[test]
-    pub fn derive_seal_key_deterministic() {
-        static PASSWORD: &[u8] = b"password";
-        let password = SafeCell::new(PASSWORD.to_vec());
-        let password2 = SafeCell::new(PASSWORD.to_vec());
-        let salt = generate_salt();
-
-        let mut key1 = derive_key(password, &salt);
-        let mut key2 = derive_key(password2, &salt);
-
-        let key1_reader = key1.0.read();
-        let key2_reader = key2.0.read();
-
-        assert_eq!(key1_reader.deref(), key2_reader.deref());
-    }
-
-    #[test]
-    pub fn successful_derive() {
-        static PASSWORD: &[u8] = b"password";
-        let password = SafeCell::new(PASSWORD.to_vec());
-        let salt = generate_salt();
-
-        let mut key = derive_key(password, &salt);
-        let key_reader = key.0.read();
-        let key_ref = key_reader.deref();
-
-        assert_ne!(key_ref.as_slice(), &[0u8; 32][..]);
-    }
-
-    #[test]
-    // We should fuzz this
-    pub fn test_nonce_increment() {
-        let mut nonce = Nonce([0u8; NONCE_LENGTH]);
-        nonce.increment();
-
-        assert_eq!(
-            nonce.0,
-            [
-                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
-            ]
-        );
-    }
-}

server/crates/arbiter-server/src/crypto/integrity/mod.rs

@@ -1,3 +0,0 @@
-pub mod v1;
-
-pub use v1::*;

server/crates/arbiter-server/src/crypto/integrity/v1.rs

@@ -1,321 +0,0 @@
-use crate::actors::keyholder;
-use arbiter_crypto::hashing::Hashable;
-use hmac::Hmac;
-use sha2::Sha256;
-
-use diesel::{ExpressionMethods as _, QueryDsl, dsl::insert_into, sqlite::Sqlite};
-use diesel_async::{AsyncConnection, RunQueryDsl};
-use kameo::{actor::ActorRef, error::SendError};
-use sha2::Digest as _;
-
-use crate::{
-    actors::keyholder::{KeyHolder, SignIntegrity, VerifyIntegrity},
-    db::{
-        self,
-        models::{IntegrityEnvelope, NewIntegrityEnvelope},
-        schema::integrity_envelope,
-    },
-};
-
-#[derive(Debug, thiserror::Error)]
-pub enum Error {
-    #[error("Database error: {0}")]
-    Database(#[from] db::DatabaseError),
-
-    #[error("KeyHolder error: {0}")]
-    Keyholder(#[from] keyholder::Error),
-
-    #[error("KeyHolder mailbox error")]
-    KeyholderSend,
-
-    #[error("Integrity envelope is missing for entity {entity_kind}")]
-    MissingEnvelope { entity_kind: &'static str },
-
-    #[error(
-        "Integrity payload version mismatch for entity {entity_kind}: expected {expected}, found {found}"
-    )]
-    PayloadVersionMismatch {
-        entity_kind: &'static str,
-        expected: i32,
-        found: i32,
-    },
-
-    #[error("Integrity MAC mismatch for entity {entity_kind}")]
-    MacMismatch { entity_kind: &'static str },
-}
-
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub enum AttestationStatus {
-    Attested,
-    Unavailable,
-}
-
-pub const CURRENT_PAYLOAD_VERSION: i32 = 1;
-pub const INTEGRITY_SUBKEY_TAG: &[u8] = b"arbiter/db-integrity-key/v1";
-
-pub type HmacSha256 = Hmac<Sha256>;
-
-pub trait Integrable: Hashable {
-    const KIND: &'static str;
-    const VERSION: i32 = 1;
-}
-
-fn payload_hash(payload: &impl Hashable) -> [u8; 32] {
-    let mut hasher = Sha256::new();
-    payload.hash(&mut hasher);
-    hasher.finalize().into()
-}
-
-fn push_len_prefixed(out: &mut Vec<u8>, bytes: &[u8]) {
-    out.extend_from_slice(&(bytes.len() as u32).to_be_bytes());
-    out.extend_from_slice(bytes);
-}
-
-fn build_mac_input(
-    entity_kind: &str,
-    entity_id: &[u8],
-    payload_version: i32,
-    payload_hash: &[u8; 32],
-) -> Vec<u8> {
-    let mut out = Vec::with_capacity(8 + entity_kind.len() + entity_id.len() + 32);
-    push_len_prefixed(&mut out, entity_kind.as_bytes());
-    push_len_prefixed(&mut out, entity_id);
-    out.extend_from_slice(&payload_version.to_be_bytes());
-    out.extend_from_slice(payload_hash);
-    out
-}
-
-pub trait IntoId {
-    fn into_id(self) -> Vec<u8>;
-}
-
-impl IntoId for i32 {
-    fn into_id(self) -> Vec<u8> {
-        self.to_be_bytes().to_vec()
-    }
-}
-
-impl IntoId for &'_ [u8] {
-    fn into_id(self) -> Vec<u8> {
-        self.to_vec()
-    }
-}
-
-pub async fn sign_entity<E: Integrable>(
-    conn: &mut impl AsyncConnection<Backend = Sqlite>,
-    keyholder: &ActorRef<KeyHolder>,
-    entity: &E,
-    entity_id: impl IntoId,
-) -> Result<(), Error> {
-    let payload_hash = payload_hash(&entity);
-
-    let entity_id = entity_id.into_id();
-
-    let mac_input = build_mac_input(E::KIND, &entity_id, E::VERSION, &payload_hash);
-
-    let (key_version, mac) = keyholder
-        .ask(SignIntegrity { mac_input })
-        .await
-        .map_err(|err| match err {
-            kameo::error::SendError::HandlerError(inner) => Error::Keyholder(inner),
-            _ => Error::KeyholderSend,
-        })?;
-
-    insert_into(integrity_envelope::table)
-        .values(NewIntegrityEnvelope {
-            entity_kind: E::KIND.to_owned(),
-            entity_id,
-            payload_version: E::VERSION,
-            key_version,
-            mac: mac.to_vec(),
-        })
-        .on_conflict((
-            integrity_envelope::entity_id,
-            integrity_envelope::entity_kind,
-        ))
-        .do_update()
-        .set((
-            integrity_envelope::payload_version.eq(E::VERSION),
-            integrity_envelope::key_version.eq(key_version),
-            integrity_envelope::mac.eq(mac),
-        ))
-        .execute(conn)
-        .await
-        .map_err(db::DatabaseError::from)?;
-
-    Ok(())
-}
-
-pub async fn verify_entity<E: Integrable>(
-    conn: &mut impl AsyncConnection<Backend = Sqlite>,
-    keyholder: &ActorRef<KeyHolder>,
-    entity: &E,
-    entity_id: impl IntoId,
-) -> Result<AttestationStatus, Error> {
-    let entity_id = entity_id.into_id();
-    let envelope: IntegrityEnvelope = integrity_envelope::table
-        .filter(integrity_envelope::entity_kind.eq(E::KIND))
-        .filter(integrity_envelope::entity_id.eq(&entity_id))
-        .first(conn)
-        .await
-        .map_err(|err| match err {
-            diesel::result::Error::NotFound => Error::MissingEnvelope {
-                entity_kind: E::KIND,
-            },
-            other => Error::Database(db::DatabaseError::from(other)),
-        })?;
-
-    if envelope.payload_version != E::VERSION {
-        return Err(Error::PayloadVersionMismatch {
-            entity_kind: E::KIND,
-            expected: E::VERSION,
-            found: envelope.payload_version,
-        });
-    }
-
-    let payload_hash = payload_hash(&entity);
-    let mac_input = build_mac_input(E::KIND, &entity_id, envelope.payload_version, &payload_hash);
-
-    let result = keyholder
-        .ask(VerifyIntegrity {
-            mac_input,
-            expected_mac: envelope.mac,
-            key_version: envelope.key_version,
-        })
-        .await;
-
-    match result {
-        Ok(true) => Ok(AttestationStatus::Attested),
-        Ok(false) => Err(Error::MacMismatch {
-            entity_kind: E::KIND,
-        }),
-        Err(SendError::HandlerError(keyholder::Error::NotBootstrapped)) => {
-            Ok(AttestationStatus::Unavailable)
-        }
-        Err(_) => Err(Error::KeyholderSend),
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use diesel::{ExpressionMethods as _, QueryDsl};
-    use diesel_async::RunQueryDsl;
-    use kameo::{actor::ActorRef, prelude::Spawn};
-
-    use crate::{
-        actors::keyholder::{Bootstrap, KeyHolder},
-        db::{self, schema},
-    };
-    use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
-
-    use super::{Error, Integrable, sign_entity, verify_entity};
-    #[derive(Clone, arbiter_macros::Hashable)]
-    struct DummyEntity {
-        payload_version: i32,
-        payload: Vec<u8>,
-    }
-    impl Integrable for DummyEntity {
-        const KIND: &'static str = "dummy_entity";
-    }
-
-    async fn bootstrapped_keyholder(db: &db::DatabasePool) -> ActorRef<KeyHolder> {
-        let actor = KeyHolder::spawn(KeyHolder::new(db.clone()).await.unwrap());
-        actor
-            .ask(Bootstrap {
-                seal_key_raw: SafeCell::new(b"integrity-test-seal-key".to_vec()),
-            })
-            .await
-            .unwrap();
-        actor
-    }
-
-    #[tokio::test]
-    async fn sign_writes_envelope_and_verify_passes() {
-        let db = db::create_test_pool().await;
-        let keyholder = bootstrapped_keyholder(&db).await;
-        let mut conn = db.get().await.unwrap();
-
-        const ENTITY_ID: &[u8] = b"entity-id-7";
-
-        let entity = DummyEntity {
-            payload_version: 1,
-            payload: b"payload-v1".to_vec(),
-        };
-
-        sign_entity(&mut conn, &keyholder, &entity, ENTITY_ID)
-            .await
-            .unwrap();
-
-        let count: i64 = schema::integrity_envelope::table
-            .filter(schema::integrity_envelope::entity_kind.eq("dummy_entity"))
-            .filter(schema::integrity_envelope::entity_id.eq(ENTITY_ID))
-            .count()
-            .get_result(&mut conn)
-            .await
-            .unwrap();
-
-        assert_eq!(count, 1, "envelope row must be created exactly once");
-        verify_entity(&mut conn, &keyholder, &entity, ENTITY_ID)
-            .await
-            .unwrap();
-    }
-
-    #[tokio::test]
-    async fn tampered_mac_fails_verification() {
-        let db = db::create_test_pool().await;
-        let keyholder = bootstrapped_keyholder(&db).await;
-        let mut conn = db.get().await.unwrap();
-
-        const ENTITY_ID: &[u8] = b"entity-id-11";
-
-        let entity = DummyEntity {
-            payload_version: 1,
-            payload: b"payload-v1".to_vec(),
-        };
-
-        sign_entity(&mut conn, &keyholder, &entity, ENTITY_ID)
-            .await
-            .unwrap();
-
-        diesel::update(schema::integrity_envelope::table)
-            .filter(schema::integrity_envelope::entity_kind.eq("dummy_entity"))
-            .filter(schema::integrity_envelope::entity_id.eq(ENTITY_ID))
-            .set(schema::integrity_envelope::mac.eq(vec![0u8; 32]))
-            .execute(&mut conn)
-            .await
-            .unwrap();
-
-        let err = verify_entity(&mut conn, &keyholder, &entity, ENTITY_ID)
-            .await
-            .unwrap_err();
-        assert!(matches!(err, Error::MacMismatch { .. }));
-    }
-
-    #[tokio::test]
-    async fn changed_payload_fails_verification() {
-        let db = db::create_test_pool().await;
-        let keyholder = bootstrapped_keyholder(&db).await;
-        let mut conn = db.get().await.unwrap();
-
-        const ENTITY_ID: &[u8] = b"entity-id-21";
-
-        let entity = DummyEntity {
-            payload_version: 1,
-            payload: b"payload-v1".to_vec(),
-        };
-
-        sign_entity(&mut conn, &keyholder, &entity, ENTITY_ID)
-            .await
-            .unwrap();
-
-        let tampered = DummyEntity {
-            payload: b"payload-v1-but-tampered".to_vec(),
-            ..entity
-        };
-
-        let err = verify_entity(&mut conn, &keyholder, &tampered, ENTITY_ID)
-            .await
-            .unwrap_err();
-        assert!(matches!(err, Error::MacMismatch { .. }));
-    }
-}

server/crates/arbiter-server/src/db/mod.rs

@@ -5,7 +5,7 @@ use diesel_async::{
     sync_connection_wrapper::SyncConnectionWrapper,
 };
 use diesel_migrations::{EmbeddedMigrations, MigrationHarness, embed_migrations};
-
+use miette::Diagnostic;
 use thiserror::Error;
 use tracing::info;
 
@@ -21,21 +21,26 @@ static DB_FILE: &str = "arbiter.sqlite";
 
 const MIGRATIONS: EmbeddedMigrations = embed_migrations!("migrations");
 
-#[derive(Error, Debug)]
+#[derive(Error, Diagnostic, Debug)]
 pub enum DatabaseSetupError {
     #[error("Failed to determine home directory")]
+    #[diagnostic(code(arbiter::db::home_dir))]
     HomeDir(std::io::Error),
 
     #[error(transparent)]
+    #[diagnostic(code(arbiter::db::connection))]
     Connection(diesel::ConnectionError),
 
     #[error(transparent)]
+    #[diagnostic(code(arbiter::db::concurrency))]
     ConcurrencySetup(diesel::result::Error),
 
     #[error(transparent)]
+    #[diagnostic(code(arbiter::db::migration))]
     Migration(Box<dyn std::error::Error + Send + Sync>),
 
     #[error(transparent)]
+    #[diagnostic(code(arbiter::db::pool))]
     Pool(#[from] PoolInitError),
 }
 
@@ -133,7 +138,6 @@ pub async fn create_pool(url: Option<&str>) -> Result<DatabasePool, DatabaseSetu
     Ok(pool)
 }
 
-#[mutants::skip]
 pub async fn create_test_pool() -> DatabasePool {
     use rand::distr::{Alphanumeric, SampleString as _};
 

server/crates/arbiter-server/src/db/models.rs

@@ -5,7 +5,7 @@ use crate::db::schema::{
     self, aead_encrypted, arbiter_settings, evm_basic_grant, evm_ether_transfer_grant,
     evm_ether_transfer_grant_target, evm_ether_transfer_limit, evm_token_transfer_grant,
     evm_token_transfer_log, evm_token_transfer_volume_limit, evm_transaction_log, evm_wallet,
-    integrity_envelope, root_key_history, tls_history,
+    root_key_history, tls_history,
 };
 use chrono::{DateTime, Utc};
 use diesel::{prelude::*, sqlite::Sqlite};
@@ -21,7 +21,7 @@ pub mod types {
         sqlite::{Sqlite, SqliteType},
     };
 
-    #[derive(Debug, FromSqlRow, AsExpression, Clone)]
+    #[derive(Debug, FromSqlRow, AsExpression)]
     #[diesel(sql_type = Integer)]
     #[repr(transparent)] // hint compiler to optimize the wrapper struct away
     pub struct SqliteTimestamp(pub DateTime<Utc>);
@@ -72,6 +72,40 @@ pub mod types {
             Ok(SqliteTimestamp(datetime))
         }
     }
+
+    /// Key algorithm stored in the `useragent_client.key_type` column.
+    /// Values must stay stable — they are persisted in the database.
+    #[derive(Debug, Clone, Copy, PartialEq, Eq, FromSqlRow, AsExpression, strum::FromRepr)]
+    #[diesel(sql_type = Integer)]
+    #[repr(i32)]
+    pub enum KeyType {
+        Ed25519 = 1,
+        EcdsaSecp256k1 = 2,
+        Rsa = 3,
+    }
+
+    impl ToSql<Integer, Sqlite> for KeyType {
+        fn to_sql<'b>(
+            &'b self,
+            out: &mut diesel::serialize::Output<'b, '_, Sqlite>,
+        ) -> diesel::serialize::Result {
+            out.set_value(*self as i32);
+            Ok(IsNull::No)
+        }
+    }
+
+    impl FromSql<Integer, Sqlite> for KeyType {
+        fn from_sql(
+            mut bytes: <Sqlite as diesel::backend::Backend>::RawValue<'_>,
+        ) -> diesel::deserialize::Result<Self> {
+            let Some(SqliteType::Long) = bytes.value_type() else {
+                return Err("Expected Integer for KeyType".into());
+            };
+            let discriminant = bytes.read_long();
+            KeyType::from_repr(discriminant as i32)
+                .ok_or_else(|| format!("Unknown KeyType discriminant: {discriminant}").into())
+        }
+    }
 }
 pub use types::*;
 
@@ -151,53 +185,12 @@ pub struct EvmWallet {
     pub created_at: SqliteTimestamp,
 }
 
-#[derive(Models, Queryable, Debug, Insertable, Selectable, Clone)]
+#[derive(Queryable, Debug, Insertable, Selectable)]
-#[diesel(table_name = schema::evm_wallet_access, check_for_backend(Sqlite))]
-#[view(
-    NewEvmWalletAccess,
-    derive(Insertable),
-    omit(id, created_at),
-    attributes_with = "deriveless"
-)]
-#[view(
-    CoreEvmWalletAccess,
-    derive(Insertable),
-    omit(created_at),
-    attributes_with = "deriveless"
-)]
-pub struct EvmWalletAccess {
-    pub id: i32,
-    pub wallet_id: i32,
-    pub client_id: i32,
-    pub created_at: SqliteTimestamp,
-}
-
-#[derive(Models, Queryable, Debug, Insertable, Selectable)]
-#[diesel(table_name = schema::client_metadata, check_for_backend(Sqlite))]
-pub struct ProgramClientMetadata {
-    pub id: i32,
-    pub name: String,
-    pub description: Option<String>,
-    pub version: Option<String>,
-    pub created_at: SqliteTimestamp,
-}
-
-#[derive(Models, Queryable, Debug, Insertable, Selectable)]
-#[diesel(table_name = schema::client_metadata_history, check_for_backend(Sqlite))]
-pub struct ProgramClientMetadataHistory {
-    pub id: i32,
-    pub metadata_id: i32,
-    pub client_id: i32,
-    pub created_at: SqliteTimestamp,
-}
-
-#[derive(Models, Queryable, Debug, Insertable, Selectable)]
 #[diesel(table_name = schema::program_client, check_for_backend(Sqlite))]
 pub struct ProgramClient {
     pub id: i32,
     pub nonce: i32,
     pub public_key: Vec<u8>,
-    pub metadata_id: i32,
     pub created_at: SqliteTimestamp,
     pub updated_at: SqliteTimestamp,
 }
@@ -210,6 +203,7 @@ pub struct UseragentClient {
     pub public_key: Vec<u8>,
     pub created_at: SqliteTimestamp,
     pub updated_at: SqliteTimestamp,
+    pub key_type: KeyType,
 }
 
 #[derive(Models, Queryable, Debug, Insertable, Selectable)]
@@ -236,7 +230,8 @@ pub struct EvmEtherTransferLimit {
 )]
 pub struct EvmBasicGrant {
     pub id: i32,
-    pub wallet_access_id: i32, // references evm_wallet_access.id
+    pub wallet_id: i32, // references evm_wallet.id
+    pub client_id: i32, // references program_client.id
     pub chain_id: i32,
     pub valid_from: Option<SqliteTimestamp>,
     pub valid_until: Option<SqliteTimestamp>,
@@ -259,7 +254,8 @@ pub struct EvmBasicGrant {
 pub struct EvmTransactionLog {
     pub id: i32,
     pub grant_id: i32,
-    pub wallet_access_id: i32,
+    pub client_id: i32,
+    pub wallet_id: i32,
     pub chain_id: i32,
     pub eth_value: Vec<u8>,
     pub signed_at: SqliteTimestamp,
@@ -341,22 +337,3 @@ pub struct EvmTokenTransferLog {
     pub value: Vec<u8>,
     pub created_at: SqliteTimestamp,
 }
-
-#[derive(Models, Queryable, Debug, Insertable, Selectable)]
-#[diesel(table_name = integrity_envelope, check_for_backend(Sqlite))]
-#[view(
-    NewIntegrityEnvelope,
-    derive(Insertable),
-    omit(id, signed_at, created_at),
-    attributes_with = "deriveless"
-)]
-pub struct IntegrityEnvelope {
-    pub id: i32,
-    pub entity_kind: String,
-    pub entity_id: Vec<u8>,
-    pub payload_version: i32,
-    pub key_version: i32,
-    pub mac: Vec<u8>,
-    pub signed_at: SqliteTimestamp,
-    pub created_at: SqliteTimestamp,
-}

server/crates/arbiter-server/src/db/schema.rs

@@ -20,29 +20,11 @@ diesel::table! {
     }
 }
 
-diesel::table! {
-    client_metadata (id) {
-        id -> Integer,
-        name -> Text,
-        description -> Nullable<Text>,
-        version -> Nullable<Text>,
-        created_at -> Integer,
-    }
-}
-
-diesel::table! {
-    client_metadata_history (id) {
-        id -> Integer,
-        metadata_id -> Integer,
-        client_id -> Integer,
-        created_at -> Integer,
-    }
-}
-
 diesel::table! {
     evm_basic_grant (id) {
         id -> Integer,
-        wallet_access_id -> Integer,
+        wallet_id -> Integer,
+        client_id -> Integer,
         chain_id -> Integer,
         valid_from -> Nullable<Integer>,
         valid_until -> Nullable<Integer>,
@@ -113,8 +95,9 @@ diesel::table! {
 diesel::table! {
     evm_transaction_log (id) {
         id -> Integer,
-        wallet_access_id -> Integer,
         grant_id -> Integer,
+        client_id -> Integer,
+        wallet_id -> Integer,
         chain_id -> Integer,
         eth_value -> Binary,
         signed_at -> Integer,
@@ -130,34 +113,11 @@ diesel::table! {
     }
 }
 
-diesel::table! {
-    evm_wallet_access (id) {
-        id -> Integer,
-        wallet_id -> Integer,
-        client_id -> Integer,
-        created_at -> Integer,
-    }
-}
-
-diesel::table! {
-    integrity_envelope (id) {
-        id -> Integer,
-        entity_kind -> Text,
-        entity_id -> Binary,
-        payload_version -> Integer,
-        key_version -> Integer,
-        mac -> Binary,
-        signed_at -> Integer,
-        created_at -> Integer,
-    }
-}
-
 diesel::table! {
     program_client (id) {
         id -> Integer,
         nonce -> Integer,
         public_key -> Binary,
-        metadata_id -> Integer,
         created_at -> Integer,
         updated_at -> Integer,
     }
@@ -191,18 +151,17 @@ diesel::table! {
         id -> Integer,
         nonce -> Integer,
         public_key -> Binary,
-        key_type -> Integer,
         created_at -> Integer,
         updated_at -> Integer,
+        key_type -> Integer,
     }
 }
 
 diesel::joinable!(aead_encrypted -> root_key_history (associated_root_key_id));
 diesel::joinable!(arbiter_settings -> root_key_history (root_key_id));
 diesel::joinable!(arbiter_settings -> tls_history (tls_id));
-diesel::joinable!(client_metadata_history -> client_metadata (metadata_id));
+diesel::joinable!(evm_basic_grant -> evm_wallet (wallet_id));
-diesel::joinable!(client_metadata_history -> program_client (client_id));
+diesel::joinable!(evm_basic_grant -> program_client (client_id));
-diesel::joinable!(evm_basic_grant -> evm_wallet_access (wallet_access_id));
 diesel::joinable!(evm_ether_transfer_grant -> evm_basic_grant (basic_grant_id));
 diesel::joinable!(evm_ether_transfer_grant -> evm_ether_transfer_limit (limit_id));
 diesel::joinable!(evm_ether_transfer_grant_target -> evm_ether_transfer_grant (grant_id));
@@ -210,18 +169,11 @@ diesel::joinable!(evm_token_transfer_grant -> evm_basic_grant (basic_grant_id));
 diesel::joinable!(evm_token_transfer_log -> evm_token_transfer_grant (grant_id));
 diesel::joinable!(evm_token_transfer_log -> evm_transaction_log (log_id));
 diesel::joinable!(evm_token_transfer_volume_limit -> evm_token_transfer_grant (grant_id));
-diesel::joinable!(evm_transaction_log -> evm_basic_grant (grant_id));
-diesel::joinable!(evm_transaction_log -> evm_wallet_access (wallet_access_id));
 diesel::joinable!(evm_wallet -> aead_encrypted (aead_encrypted_id));
-diesel::joinable!(evm_wallet_access -> evm_wallet (wallet_id));
-diesel::joinable!(evm_wallet_access -> program_client (client_id));
-diesel::joinable!(program_client -> client_metadata (metadata_id));
 
 diesel::allow_tables_to_appear_in_same_query!(
     aead_encrypted,
     arbiter_settings,
-    client_metadata,
-    client_metadata_history,
     evm_basic_grant,
     evm_ether_transfer_grant,
     evm_ether_transfer_grant_target,
@@ -231,8 +183,6 @@ diesel::allow_tables_to_appear_in_same_query!(
     evm_token_transfer_volume_limit,
     evm_transaction_log,
     evm_wallet,
-    evm_wallet_access,
-    integrity_envelope,
     program_client,
     root_key_history,
     tls_history,

server/crates/arbiter-server/src/evm/mod.rs

@@ -6,23 +6,18 @@ use alloy::{
     primitives::{TxKind, U256},
 };
 use chrono::Utc;
-use diesel::{ExpressionMethods as _, QueryDsl as _, QueryResult, insert_into, sqlite::Sqlite};
+use diesel::{ExpressionMethods as _, QueryDsl, QueryResult, insert_into, sqlite::Sqlite};
 use diesel_async::{AsyncConnection, RunQueryDsl};
-use kameo::actor::ActorRef;
 
 use crate::{
-    actors::keyholder::KeyHolder,
-    crypto::integrity,
     db::{
-        self, DatabaseError,
+        self,
-        models::{
+        models::{EvmBasicGrant, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp},
-            EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
-        },
         schema::{self, evm_transaction_log},
     },
     evm::policies::{
-        CombinedSettings, DatabaseID, EvalContext, EvalViolation, Grant, Policy,
+        DatabaseID, EvalContext, EvalViolation, FullGrant, Grant, Policy, SharedGrantSettings,
-        SharedGrantSettings, SpecificGrant, SpecificMeaning, ether_transfer::EtherTransfer,
+        SpecificGrant, SpecificMeaning, ether_transfer::EtherTransfer,
         token_transfers::TokenTransfer,
     },
 };
@@ -31,45 +26,76 @@ pub mod policies;
 mod utils;
 
 /// Errors that can only occur once the transaction meaning is known (during policy evaluation)
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
 pub enum PolicyError {
-    #[error("Database error")]
+    #[error("Database connection pool error")]
-    Database(#[from] crate::db::DatabaseError),
+    #[diagnostic(code(arbiter_server::evm::policy_error::pool))]
+    Pool(#[from] db::PoolError),
+    #[error("Database returned error")]
+    #[diagnostic(code(arbiter_server::evm::policy_error::database))]
+    Database(#[from] diesel::result::Error),
     #[error("Transaction violates policy: {0:?}")]
+    #[diagnostic(code(arbiter_server::evm::policy_error::violation))]
     Violations(Vec<EvalViolation>),
     #[error("No matching grant found")]
+    #[diagnostic(code(arbiter_server::evm::policy_error::no_matching_grant))]
     NoMatchingGrant,
-
-    #[error("Integrity error: {0}")]
-    Integrity(#[from] integrity::Error),
 }
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
 pub enum VetError {
     #[error("Contract creation transactions are not supported")]
+    #[diagnostic(code(arbiter_server::evm::vet_error::contract_creation_unsupported))]
     ContractCreationNotSupported,
     #[error("Engine can't classify this transaction")]
+    #[diagnostic(code(arbiter_server::evm::vet_error::unsupported))]
     UnsupportedTransactionType,
     #[error("Policy evaluation failed: {1}")]
+    #[diagnostic(code(arbiter_server::evm::vet_error::evaluated))]
     Evaluated(SpecificMeaning, #[source] PolicyError),
 }
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
+pub enum SignError {
+    #[error("Database connection pool error")]
+    #[diagnostic(code(arbiter_server::evm::database_error))]
+    Pool(#[from] db::PoolError),
+    #[error("Database returned error")]
+    #[diagnostic(code(arbiter_server::evm::database_error))]
+    Database(#[from] diesel::result::Error),
+}
+
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
 pub enum AnalyzeError {
     #[error("Engine doesn't support granting permissions for contract creation")]
+    #[diagnostic(code(arbiter_server::evm::analyze_error::contract_creation_not_supported))]
     ContractCreationNotSupported,
 
     #[error("Unsupported transaction type")]
+    #[diagnostic(code(arbiter_server::evm::analyze_error::unsupported_transaction_type))]
     UnsupportedTransactionType,
 }
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
-pub enum ListError {
+pub enum CreationError {
-    #[error("Database error")]
+    #[error("Database connection pool error")]
-    Database(#[from] crate::db::DatabaseError),
+    #[diagnostic(code(arbiter_server::evm::creation_error::database_error))]
+    Pool(#[from] db::PoolError),
 
-    #[error("Integrity verification failed for grant")]
+    #[error("Database returned error")]
-    Integrity(#[from] integrity::Error),
+    #[diagnostic(code(arbiter_server::evm::creation_error::database_error))]
+    Database(#[from] diesel::result::Error),
+}
+
+#[derive(Debug, thiserror::Error, miette::Diagnostic)]
+pub enum ListGrantsError {
+    #[error("Database connection pool error")]
+    #[diagnostic(code(arbiter_server::evm::list_grants_error::pool))]
+    Pool(#[from] db::PoolError),
+
+    #[error("Database returned error")]
+    #[diagnostic(code(arbiter_server::evm::list_grants_error::database))]
+    Database(#[from] diesel::result::Error),
 }
 
 /// Controls whether a transaction should be executed or only validated
@@ -90,14 +116,6 @@ async fn check_shared_constraints(
     let mut violations = Vec::new();
     let now = Utc::now();
 
-    if shared.chain != context.chain {
-        violations.push(EvalViolation::MismatchingChainId {
-            expected: shared.chain,
-            actual: context.chain,
-        });
-        return Ok(violations);
-    }
-
     // Validity window
     if shared.valid_from.is_some_and(|t| now < t) || shared.valid_until.is_some_and(|t| now > t) {
         violations.push(EvalViolation::InvalidTime);
@@ -138,7 +156,6 @@ async fn check_shared_constraints(
 // Supporting only EIP-1559 transactions for now, but we can easily extend this to support legacy transactions if needed
 pub struct Engine {
     db: db::DatabasePool,
-    keyholder: ActorRef<KeyHolder>,
 }
 
 impl Engine {
@@ -147,44 +164,28 @@ impl Engine {
         context: EvalContext,
         meaning: &P::Meaning,
         run_kind: RunKind,
-    ) -> Result<(), PolicyError>
+    ) -> Result<(), PolicyError> {
-    where
+        let mut conn = self.db.get().await?;
-        P::Settings: Clone,
-    {
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
 
         let grant = P::try_find_grant(&context, &mut conn)
-            .await
+            .await?
-            .map_err(DatabaseError::from)?
             .ok_or(PolicyError::NoMatchingGrant)?;
 
-        integrity::verify_entity(&mut conn, &self.keyholder, &grant.settings, grant.id).await?;
+        let mut violations =
-
+            check_shared_constraints(&context, &grant.shared, grant.shared_grant_id, &mut conn)
-        let mut violations = check_shared_constraints(
+                .await?;
-            &context,
+        violations.extend(P::evaluate(&context, meaning, &grant, &mut conn).await?);
-            &grant.settings.shared,
-            grant.common_settings_id,
-            &mut conn,
-        )
-        .await
-        .map_err(DatabaseError::from)?;
-        violations.extend(
-            P::evaluate(&context, meaning, &grant, &mut conn)
-                .await
-                .map_err(DatabaseError::from)?,
-        );
 
         if !violations.is_empty() {
             return Err(PolicyError::Violations(violations));
-        }
+        } else if run_kind == RunKind::Execution {
-
-        if run_kind == RunKind::Execution {
             conn.transaction(|conn| {
                 Box::pin(async move {
                     let log_id: i32 = insert_into(evm_transaction_log::table)
                         .values(&NewEvmTransactionLog {
-                            grant_id: grant.common_settings_id,
+                            grant_id: grant.shared_grant_id,
-                            wallet_access_id: context.target.id,
+                            client_id: context.client_id,
+                            wallet_id: context.wallet_id,
                             chain_id: context.chain as i32,
                             eth_value: utils::u256_to_bytes(context.value).to_vec(),
                             signed_at: Utc::now().into(),
@@ -198,8 +199,7 @@ impl Engine {
                     QueryResult::Ok(())
                 })
             })
-            .await
+            .await?;
-            .map_err(DatabaseError::from)?;
         }
 
         Ok(())
@@ -207,19 +207,16 @@ impl Engine {
 }
 
 impl Engine {
-    pub fn new(db: db::DatabasePool, keyholder: ActorRef<KeyHolder>) -> Self {
+    pub fn new(db: db::DatabasePool) -> Self {
-        Self { db, keyholder }
+        Self { db }
     }
 
     pub async fn create_grant<P: Policy>(
         &self,
-        full_grant: CombinedSettings<P::Settings>,
+        client_id: i32,
-    ) -> Result<i32, DatabaseError>
+        full_grant: FullGrant<P::Settings>,
-    where
+    ) -> Result<i32, CreationError> {
-        P::Settings: Clone,
-    {
         let mut conn = self.db.get().await?;
-        let keyholder = self.keyholder.clone();
 
         let id = conn
             .transaction(|conn| {
@@ -228,25 +225,26 @@ impl Engine {
 
                     let basic_grant: EvmBasicGrant = insert_into(evm_basic_grant::table)
                         .values(&NewEvmBasicGrant {
-                            chain_id: full_grant.shared.chain as i32,
+                            wallet_id: full_grant.basic.wallet_id,
-                            wallet_access_id: full_grant.shared.wallet_access_id,
+                            chain_id: full_grant.basic.chain as i32,
-                            valid_from: full_grant.shared.valid_from.map(SqliteTimestamp),
+                            client_id,
-                            valid_until: full_grant.shared.valid_until.map(SqliteTimestamp),
+                            valid_from: full_grant.basic.valid_from.map(SqliteTimestamp),
+                            valid_until: full_grant.basic.valid_until.map(SqliteTimestamp),
                             max_gas_fee_per_gas: full_grant
-                                .shared
+                                .basic
                                 .max_gas_fee_per_gas
                                 .map(|fee| utils::u256_to_bytes(fee).to_vec()),
                             max_priority_fee_per_gas: full_grant
-                                .shared
+                                .basic
                                 .max_priority_fee_per_gas
                                 .map(|fee| utils::u256_to_bytes(fee).to_vec()),
                             rate_limit_count: full_grant
-                                .shared
+                                .basic
                                 .rate_limit
                                 .as_ref()
                                 .map(|rl| rl.count as i32),
                             rate_limit_window_secs: full_grant
-                                .shared
+                                .basic
                                 .rate_limit
                                 .as_ref()
                                 .map(|rl| rl.window.num_seconds() as i32),
@@ -256,13 +254,7 @@ impl Engine {
                         .get_result(conn)
                         .await?;
 
-                    P::create_grant(&basic_grant, &full_grant.specific, conn).await?;
+                    P::create_grant(&basic_grant, &full_grant.specific, conn).await
-
-                    integrity::sign_entity(conn, &keyholder, &full_grant, basic_grant.id)
-                        .await
-                        .map_err(|_| diesel::result::Error::RollbackTransaction)?;
-
-                    QueryResult::Ok(basic_grant.id)
                 })
             })
             .await?;
@@ -270,43 +262,41 @@ impl Engine {
         Ok(id)
     }
 
-    async fn list_one_kind<Kind: Policy, Y>(
+    pub async fn list_all_grants(&self) -> Result<Vec<Grant<SpecificGrant>>, ListGrantsError> {
-        &self,
+        let mut conn = self.db.get().await?;
-        conn: &mut impl AsyncConnection<Backend = Sqlite>,
-    ) -> Result<impl Iterator<Item = Grant<Y>>, ListError>
-    where
-        Y: From<Kind::Settings>,
-    {
-        let all_grants = Kind::find_all_grants(conn)
-            .await
-            .map_err(DatabaseError::from)?;
-
-        // Verify integrity of all grants before returning any results
-        for grant in &all_grants {
-            integrity::verify_entity(conn, &self.keyholder, &grant.settings, grant.id).await?;
-        }
-
-        Ok(all_grants.into_iter().map(|g| Grant {
-            id: g.id,
-            common_settings_id: g.common_settings_id,
-            settings: g.settings.generalize(),
-        }))
-    }
-
-    pub async fn list_all_grants(&self) -> Result<Vec<Grant<SpecificGrant>>, ListError> {
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
 
         let mut grants: Vec<Grant<SpecificGrant>> = Vec::new();
 
-        grants.extend(self.list_one_kind::<EtherTransfer, _>(&mut conn).await?);
+        grants.extend(
-        grants.extend(self.list_one_kind::<TokenTransfer, _>(&mut conn).await?);
+            EtherTransfer::find_all_grants(&mut conn)
+                .await?
+                .into_iter()
+                .map(|g| Grant {
+                    id: g.id,
+                    shared_grant_id: g.shared_grant_id,
+                    shared: g.shared,
+                    settings: SpecificGrant::EtherTransfer(g.settings),
+                }),
+        );
+        grants.extend(
+            TokenTransfer::find_all_grants(&mut conn)
+                .await?
+                .into_iter()
+                .map(|g| Grant {
+                    id: g.id,
+                    shared_grant_id: g.shared_grant_id,
+                    shared: g.shared,
+                    settings: SpecificGrant::TokenTransfer(g.settings),
+                }),
+        );
 
         Ok(grants)
     }
 
     pub async fn evaluate_transaction(
         &self,
-        target: EvmWalletAccess,
+        wallet_id: i32,
+        client_id: i32,
         transaction: TxEip1559,
         run_kind: RunKind,
     ) -> Result<SpecificMeaning, VetError> {
@@ -314,7 +304,8 @@ impl Engine {
             return Err(VetError::ContractCreationNotSupported);
         };
         let context = policies::EvalContext {
-            target,
+            wallet_id,
+            client_id,
             chain: transaction.chain_id,
             to,
             value: transaction.value,
@@ -345,255 +336,3 @@ impl Engine {
         Err(VetError::UnsupportedTransactionType)
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use alloy::primitives::{Address, Bytes, U256, address};
-    use chrono::{Duration, Utc};
-    use diesel::{SelectableHelper, insert_into};
-    use diesel_async::RunQueryDsl;
-    use rstest::rstest;
-
-    use crate::db::{
-        self, DatabaseConnection,
-        models::{
-            EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
-        },
-        schema::{evm_basic_grant, evm_transaction_log},
-    };
-    use crate::evm::policies::{
-        EvalContext, EvalViolation, SharedGrantSettings, TransactionRateLimit,
-    };
-
-    use super::check_shared_constraints;
-
-    const WALLET_ACCESS_ID: i32 = 1;
-    const CHAIN_ID: u64 = 1;
-    const RECIPIENT: Address = address!("1111111111111111111111111111111111111111");
-
-    fn context() -> EvalContext {
-        EvalContext {
-            target: EvmWalletAccess {
-                id: WALLET_ACCESS_ID,
-                wallet_id: 10,
-                client_id: 20,
-                created_at: SqliteTimestamp(Utc::now()),
-            },
-            chain: CHAIN_ID,
-            to: RECIPIENT,
-            value: U256::ZERO,
-            calldata: Bytes::new(),
-            max_fee_per_gas: 100,
-            max_priority_fee_per_gas: 10,
-        }
-    }
-
-    fn shared_settings() -> SharedGrantSettings {
-        SharedGrantSettings {
-            wallet_access_id: WALLET_ACCESS_ID,
-            chain: CHAIN_ID,
-            valid_from: None,
-            valid_until: None,
-            max_gas_fee_per_gas: None,
-            max_priority_fee_per_gas: None,
-            rate_limit: None,
-        }
-    }
-
-    async fn insert_basic_grant(
-        conn: &mut DatabaseConnection,
-        shared: &SharedGrantSettings,
-    ) -> EvmBasicGrant {
-        insert_into(evm_basic_grant::table)
-            .values(NewEvmBasicGrant {
-                wallet_access_id: shared.wallet_access_id,
-                chain_id: shared.chain as i32,
-                valid_from: shared.valid_from.map(SqliteTimestamp),
-                valid_until: shared.valid_until.map(SqliteTimestamp),
-                max_gas_fee_per_gas: shared
-                    .max_gas_fee_per_gas
-                    .map(|fee| super::utils::u256_to_bytes(fee).to_vec()),
-                max_priority_fee_per_gas: shared
-                    .max_priority_fee_per_gas
-                    .map(|fee| super::utils::u256_to_bytes(fee).to_vec()),
-                rate_limit_count: shared.rate_limit.as_ref().map(|limit| limit.count as i32),
-                rate_limit_window_secs: shared
-                    .rate_limit
-                    .as_ref()
-                    .map(|limit| limit.window.num_seconds() as i32),
-                revoked_at: None,
-            })
-            .returning(EvmBasicGrant::as_select())
-            .get_result(conn)
-            .await
-            .unwrap()
-    }
-
-    #[rstest]
-    #[case::matching_chain(CHAIN_ID, false)]
-    #[case::mismatching_chain(CHAIN_ID + 1, true)]
-    #[tokio::test]
-    async fn check_shared_constraints_enforces_chain_id(
-        #[case] context_chain: u64,
-        #[case] expect_mismatch: bool,
-    ) {
-        let db = db::create_test_pool().await;
-        let mut conn = db.get().await.unwrap();
-
-        let context = EvalContext {
-            chain: context_chain,
-            ..context()
-        };
-
-        let violations = check_shared_constraints(&context, &shared_settings(), 999, &mut *conn)
-            .await
-            .unwrap();
-
-        assert_eq!(
-            violations
-                .iter()
-                .any(|violation| matches!(violation, EvalViolation::MismatchingChainId { .. })),
-            expect_mismatch
-        );
-
-        if expect_mismatch {
-            assert_eq!(violations.len(), 1);
-        } else {
-            assert!(violations.is_empty());
-        }
-    }
-
-    #[rstest]
-    #[case::valid_from_in_bounds(Some(Utc::now() - Duration::hours(1)), None, false)]
-    #[case::valid_from_out_of_bounds(Some(Utc::now() + Duration::hours(1)), None, true)]
-    #[case::valid_until_in_bounds(None, Some(Utc::now() + Duration::hours(1)), false)]
-    #[case::valid_until_out_of_bounds(None, Some(Utc::now() - Duration::hours(1)), true)]
-    #[tokio::test]
-    async fn check_shared_constraints_enforces_validity_window(
-        #[case] valid_from: Option<chrono::DateTime<Utc>>,
-        #[case] valid_until: Option<chrono::DateTime<Utc>>,
-        #[case] expect_invalid_time: bool,
-    ) {
-        let db = db::create_test_pool().await;
-        let mut conn = db.get().await.unwrap();
-
-        let shared = SharedGrantSettings {
-            valid_from,
-            valid_until,
-            ..shared_settings()
-        };
-
-        let violations = check_shared_constraints(&context(), &shared, 999, &mut *conn)
-            .await
-            .unwrap();
-
-        assert_eq!(
-            violations
-                .iter()
-                .any(|violation| matches!(violation, EvalViolation::InvalidTime)),
-            expect_invalid_time
-        );
-
-        if expect_invalid_time {
-            assert_eq!(violations.len(), 1);
-        } else {
-            assert!(violations.is_empty());
-        }
-    }
-
-    #[rstest]
-    #[case::max_fee_within_limit(Some(U256::from(100u64)), None, 100, 10, false)]
-    #[case::max_fee_exceeded(Some(U256::from(99u64)), None, 100, 10, true)]
-    #[case::priority_fee_within_limit(None, Some(U256::from(10u64)), 100, 10, false)]
-    #[case::priority_fee_exceeded(None, Some(U256::from(9u64)), 100, 10, true)]
-    #[tokio::test]
-    async fn check_shared_constraints_enforces_gas_fee_caps(
-        #[case] max_gas_fee_per_gas: Option<U256>,
-        #[case] max_priority_fee_per_gas: Option<U256>,
-        #[case] actual_max_fee_per_gas: u128,
-        #[case] actual_max_priority_fee_per_gas: u128,
-        #[case] expect_gas_limit_violation: bool,
-    ) {
-        let db = db::create_test_pool().await;
-        let mut conn = db.get().await.unwrap();
-
-        let context = EvalContext {
-            max_fee_per_gas: actual_max_fee_per_gas,
-            max_priority_fee_per_gas: actual_max_priority_fee_per_gas,
-            ..context()
-        };
-
-        let shared = SharedGrantSettings {
-            max_gas_fee_per_gas,
-            max_priority_fee_per_gas,
-            ..shared_settings()
-        };
-        let violations = check_shared_constraints(&context, &shared, 999, &mut *conn)
-            .await
-            .unwrap();
-
-        assert_eq!(
-            violations
-                .iter()
-                .any(|violation| matches!(violation, EvalViolation::GasLimitExceeded { .. })),
-            expect_gas_limit_violation
-        );
-
-        if expect_gas_limit_violation {
-            assert_eq!(violations.len(), 1);
-        } else {
-            assert!(violations.is_empty());
-        }
-    }
-
-    #[rstest]
-    #[case::under_rate_limit(2, false)]
-    #[case::at_rate_limit(1, true)]
-    #[tokio::test]
-    async fn check_shared_constraints_enforces_rate_limit(
-        #[case] rate_limit_count: u32,
-        #[case] expect_rate_limit_violation: bool,
-    ) {
-        let db = db::create_test_pool().await;
-        let mut conn = db.get().await.unwrap();
-
-        let shared = SharedGrantSettings {
-            rate_limit: Some(TransactionRateLimit {
-                count: rate_limit_count,
-                window: Duration::hours(1),
-            }),
-            ..shared_settings()
-        };
-
-        let basic_grant = insert_basic_grant(&mut conn, &shared).await;
-
-        insert_into(evm_transaction_log::table)
-            .values(NewEvmTransactionLog {
-                grant_id: basic_grant.id,
-                wallet_access_id: WALLET_ACCESS_ID,
-                chain_id: CHAIN_ID as i32,
-                eth_value: super::utils::u256_to_bytes(U256::ZERO).to_vec(),
-                signed_at: SqliteTimestamp(Utc::now()),
-            })
-            .execute(&mut *conn)
-            .await
-            .unwrap();
-
-        let violations = check_shared_constraints(&context(), &shared, basic_grant.id, &mut *conn)
-            .await
-            .unwrap();
-
-        assert_eq!(
-            violations
-                .iter()
-                .any(|violation| matches!(violation, EvalViolation::RateLimitExceeded)),
-            expect_rate_limit_violation
-        );
-
-        if expect_rate_limit_violation {
-            assert_eq!(violations.len(), 1);
-        } else {
-            assert!(violations.is_empty());
-        }
-    }
-}

server/crates/arbiter-server/src/evm/policies.rs

@@ -6,12 +6,11 @@ use diesel::{
     ExpressionMethods as _, QueryDsl, SelectableHelper, result::QueryResult, sqlite::Sqlite,
 };
 use diesel_async::{AsyncConnection, RunQueryDsl};
-
+use miette::Diagnostic;
 use thiserror::Error;
 
 use crate::{
-    crypto::integrity::v1::Integrable,
+    db::models::{self, EvmBasicGrant},
-    db::models::{self, EvmBasicGrant, EvmWalletAccess},
     evm::utils,
 };
 
@@ -20,8 +19,9 @@ pub mod token_transfers;
 
 #[derive(Debug, Clone)]
 pub struct EvalContext {
-    // Which wallet is this transaction for and who requested it
+    // Which wallet is this transaction for
-    pub target: EvmWalletAccess,
+    pub client_id: i32,
+    pub wallet_id: i32,
 
     // The transaction data
     pub chain: ChainId,
@@ -34,31 +34,34 @@ pub struct EvalContext {
     pub max_priority_fee_per_gas: u128,
 }
 
-#[derive(Debug, Error)]
+#[derive(Debug, Error, Diagnostic)]
 pub enum EvalViolation {
     #[error("This grant doesn't allow transactions to the target address {target}")]
+    #[diagnostic(code(arbiter_server::evm::eval_violation::invalid_target))]
     InvalidTarget { target: Address },
 
     #[error("Gas limit exceeded for this grant")]
+    #[diagnostic(code(arbiter_server::evm::eval_violation::gas_limit_exceeded))]
     GasLimitExceeded {
         max_gas_fee_per_gas: Option<U256>,
         max_priority_fee_per_gas: Option<U256>,
     },
 
     #[error("Rate limit exceeded for this grant")]
+    #[diagnostic(code(arbiter_server::evm::eval_violation::rate_limit_exceeded))]
     RateLimitExceeded,
 
     #[error("Transaction exceeds volumetric limits of the grant")]
+    #[diagnostic(code(arbiter_server::evm::eval_violation::volumetric_limit_exceeded))]
     VolumetricLimitExceeded,
 
     #[error("Transaction is outside of the grant's validity period")]
+    #[diagnostic(code(arbiter_server::evm::eval_violation::invalid_time))]
     InvalidTime,
 
     #[error("Transaction type is not allowed by this grant")]
+    #[diagnostic(code(arbiter_server::evm::eval_violation::invalid_transaction_type))]
     InvalidTransactionType,
-
-    #[error("Mismatching chain ID")]
-    MismatchingChainId { expected: ChainId, actual: ChainId },
 }
 
 pub type DatabaseID = i32;
@@ -66,12 +69,13 @@ pub type DatabaseID = i32;
 #[derive(Debug)]
 pub struct Grant<PolicySettings> {
     pub id: DatabaseID,
-    pub common_settings_id: DatabaseID, // ID of the basic grant for shared-logic checks like rate limits and validity periods
+    pub shared_grant_id: DatabaseID, // ID of the basic grant for shared-logic checks like rate limits and validity periods
-    pub settings: CombinedSettings<PolicySettings>,
+    pub shared: SharedGrantSettings,
+    pub settings: PolicySettings,
 }
 
 pub trait Policy: Sized {
-    type Settings: Send + Sync + 'static + Into<SpecificGrant> + Integrable;
+    type Settings: Send + Sync + 'static + Into<SpecificGrant>;
     type Meaning: Display + std::fmt::Debug + Send + Sync + 'static + Into<SpecificMeaning>;
 
     fn analyze(context: &EvalContext) -> Option<Self::Meaning>;
@@ -127,21 +131,22 @@ pub enum SpecificMeaning {
     TokenTransfer(token_transfers::Meaning),
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, arbiter_macros::Hashable)]
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct TransactionRateLimit {
     pub count: u32,
     pub window: Duration,
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, arbiter_macros::Hashable)]
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct VolumeRateLimit {
     pub max_volume: U256,
     pub window: Duration,
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, Hash, arbiter_macros::Hashable)]
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct SharedGrantSettings {
-    pub wallet_access_id: i32,
+    pub wallet_id: i32,
+    pub client_id: i32,
     pub chain: ChainId,
 
     pub valid_from: Option<DateTime<Utc>>,
@@ -154,9 +159,10 @@ pub struct SharedGrantSettings {
 }
 
 impl SharedGrantSettings {
-    pub(crate) fn try_from_model(model: EvmBasicGrant) -> QueryResult<Self> {
+    fn try_from_model(model: EvmBasicGrant) -> QueryResult<Self> {
         Ok(Self {
-            wallet_access_id: model.wallet_access_id,
+            wallet_id: model.wallet_id,
+            client_id: model.client_id,
             chain: model.chain_id as u64, // safe because chain_id is stored as i32 but is guaranteed to be a valid ChainId by the API when creating grants
             valid_from: model.valid_from.map(Into::into),
             valid_until: model.valid_until.map(Into::into),
@@ -200,22 +206,7 @@ pub enum SpecificGrant {
     TokenTransfer(token_transfers::Settings),
 }
 
-#[derive(Debug, arbiter_macros::Hashable)]
+pub struct FullGrant<PolicyGrant> {
-pub struct CombinedSettings<PolicyGrant> {
+    pub basic: SharedGrantSettings,
-    pub shared: SharedGrantSettings,
     pub specific: PolicyGrant,
 }
-
-impl<P> CombinedSettings<P> {
-    pub fn generalize<Y: From<P>>(self) -> CombinedSettings<Y> {
-        CombinedSettings {
-            shared: self.shared,
-            specific: self.specific.into(),
-        }
-    }
-}
-
-impl<P: Integrable> Integrable for CombinedSettings<P> {
-    const KIND: &'static str = P::KIND;
-    const VERSION: i32 = P::VERSION;
-}

server/crates/arbiter-server/src/evm/policies/ether_transfer/mod.rs

@@ -8,14 +8,13 @@ use diesel::sqlite::Sqlite;
 use diesel::{ExpressionMethods, JoinOnDsl, prelude::*};
 use diesel_async::{AsyncConnection, RunQueryDsl};
 
-use crate::crypto::integrity::v1::Integrable;
 use crate::db::models::{
     EvmBasicGrant, EvmEtherTransferGrant, EvmEtherTransferGrantTarget, EvmEtherTransferLimit,
     NewEvmEtherTransferLimit, SqliteTimestamp,
 };
 use crate::db::schema::{evm_basic_grant, evm_ether_transfer_limit, evm_transaction_log};
 use crate::evm::policies::{
-    CombinedSettings, Grant, SharedGrantSettings, SpecificGrant, SpecificMeaning, VolumeRateLimit,
+    Grant, SharedGrantSettings, SpecificGrant, SpecificMeaning, VolumeRateLimit,
 };
 use crate::{
     db::{
@@ -37,8 +36,8 @@ use super::{DatabaseID, EvalContext, EvalViolation};
 // Plain ether transfer
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct Meaning {
-    pub(crate) to: Address,
+    to: Address,
-    pub(crate) value: U256,
+    value: U256,
 }
 impl Display for Meaning {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -52,14 +51,11 @@ impl From<Meaning> for SpecificMeaning {
 }
 
 // A grant for ether transfers, which can be scoped to specific target addresses and volume limits
-#[derive(Debug, Clone, arbiter_macros::Hashable)]
+#[derive(Debug, Clone)]
 pub struct Settings {
     pub target: Vec<Address>,
     pub limit: VolumeRateLimit,
 }
-impl Integrable for Settings {
-    const KIND: &'static str = "EtherTransfer";
-}
 
 impl From<Settings> for SpecificGrant {
     fn from(val: Settings) -> SpecificGrant {
@@ -95,21 +91,20 @@ async fn query_relevant_past_transaction(
 
 async fn check_rate_limits(
     grant: &Grant<Settings>,
-    current_transfer_value: U256,
     db: &mut impl AsyncConnection<Backend = Sqlite>,
 ) -> QueryResult<Vec<EvalViolation>> {
     let mut violations = Vec::new();
-    let window = grant.settings.specific.limit.window;
+    let window = grant.settings.limit.window;
 
     let past_transaction = query_relevant_past_transaction(grant.id, window, db).await?;
 
-    let window_start = chrono::Utc::now() - grant.settings.specific.limit.window;
+    let window_start = chrono::Utc::now() - grant.settings.limit.window;
-    let prospective_cumulative_volume: U256 = past_transaction
+    let cumulative_volume: U256 = past_transaction
         .iter()
         .filter(|(_, timestamp)| timestamp >= &window_start)
-        .fold(current_transfer_value, |acc, (value, _)| acc + *value);
+        .fold(U256::default(), |acc, (value, _)| acc + *value);
 
-    if prospective_cumulative_volume > grant.settings.specific.limit.max_volume {
+    if cumulative_volume > grant.settings.limit.max_volume {
         violations.push(EvalViolation::VolumetricLimitExceeded);
     }
 
@@ -142,11 +137,11 @@ impl Policy for EtherTransfer {
         let mut violations = Vec::new();
 
         // Check if the target address is within the grant's allowed targets
-        if !grant.settings.specific.target.contains(&meaning.to) {
+        if !grant.settings.target.contains(&meaning.to) {
             violations.push(EvalViolation::InvalidTarget { target: meaning.to });
         }
 
-        let rate_violations = check_rate_limits(grant, meaning.value, db).await?;
+        let rate_violations = check_rate_limits(grant, db).await?;
         violations.extend(rate_violations);
 
         Ok(violations)
@@ -201,8 +196,9 @@ impl Policy for EtherTransfer {
             .inner_join(evm_basic_grant::table)
             .inner_join(evm_ether_transfer_grant_target::table)
             .filter(
-                evm_basic_grant::wallet_access_id
+                evm_basic_grant::wallet_id
-                    .eq(context.target.id)
+                    .eq(context.wallet_id)
+                    .and(evm_basic_grant::client_id.eq(context.client_id))
                     .and(evm_basic_grant::revoked_at.is_null())
                     .and(evm_ether_transfer_grant_target::address.eq(&target_bytes)),
             )
@@ -251,11 +247,9 @@ impl Policy for EtherTransfer {
 
         Ok(Some(Grant {
             id: grant.id,
-            common_settings_id: grant.basic_grant_id,
+            shared_grant_id: grant.basic_grant_id,
-            settings: CombinedSettings {
+            shared: SharedGrantSettings::try_from_model(basic_grant)?,
-                shared: SharedGrantSettings::try_from_model(basic_grant)?,
+            settings,
-                specific: settings,
-            },
         }))
     }
 
@@ -333,17 +327,15 @@ impl Policy for EtherTransfer {
 
                 Ok(Grant {
                     id: specific.id,
-                    common_settings_id: specific.basic_grant_id,
+                    shared_grant_id: specific.basic_grant_id,
-                    settings: CombinedSettings {
+                    shared: SharedGrantSettings::try_from_model(basic)?,
-                        shared: SharedGrantSettings::try_from_model(basic)?,
+                    settings: Settings {
-                        specific: Settings {
+                        target: targets,
-                            target: targets,
+                        limit: VolumeRateLimit {
-                            limit: VolumeRateLimit {
+                            max_volume: utils::try_bytes_to_u256(&limit.max_volume).map_err(
-                                max_volume: utils::try_bytes_to_u256(&limit.max_volume).map_err(
+                                |e| diesel::result::Error::DeserializationError(Box::new(e)),
-                                    |e| diesel::result::Error::DeserializationError(Box::new(e)),
+                            )?,
-                                )?,
+                            window: Duration::seconds(limit.window_secs as i64),
-                                window: Duration::seconds(limit.window_secs as i64),
-                            },
                         },
                     },
                 })

server/crates/arbiter-server/src/evm/policies/ether_transfer/tests.rs

@@ -5,22 +5,18 @@ use diesel_async::RunQueryDsl;
 
 use crate::db::{
     self, DatabaseConnection,
-    models::{
+    models::{EvmBasicGrant, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp},
-        EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
-    },
     schema::{evm_basic_grant, evm_transaction_log},
 };
 use crate::evm::{
-    policies::{
+    policies::{EvalContext, EvalViolation, Grant, Policy, SharedGrantSettings, VolumeRateLimit},
-        CombinedSettings, EvalContext, EvalViolation, Grant, Policy, SharedGrantSettings,
-        VolumeRateLimit,
-    },
     utils,
 };
 
 use super::{EtherTransfer, Settings};
 
-const WALLET_ACCESS_ID: i32 = 1;
+const WALLET_ID: i32 = 1;
+const CLIENT_ID: i32 = 2;
 const CHAIN_ID: u64 = 1;
 
 const ALLOWED: Address = address!("1111111111111111111111111111111111111111");
@@ -28,12 +24,8 @@ const OTHER: Address = address!("2222222222222222222222222222222222222222");
 
 fn ctx(to: Address, value: U256) -> EvalContext {
     EvalContext {
-        target: EvmWalletAccess {
+        wallet_id: WALLET_ID,
-            id: WALLET_ACCESS_ID,
+        client_id: CLIENT_ID,
-            wallet_id: 10,
-            client_id: 20,
-            created_at: SqliteTimestamp(Utc::now()),
-        },
         chain: CHAIN_ID,
         to,
         value,
@@ -46,7 +38,8 @@ fn ctx(to: Address, value: U256) -> EvalContext {
 async fn insert_basic(conn: &mut DatabaseConnection, revoked: bool) -> EvmBasicGrant {
     insert_into(evm_basic_grant::table)
         .values(NewEvmBasicGrant {
-            wallet_access_id: WALLET_ACCESS_ID,
+            wallet_id: WALLET_ID,
+            client_id: CLIENT_ID,
             chain_id: CHAIN_ID as i32,
             valid_from: None,
             valid_until: None,
@@ -74,16 +67,19 @@ fn make_settings(targets: Vec<Address>, max_volume: u64) -> Settings {
 
 fn shared() -> SharedGrantSettings {
     SharedGrantSettings {
-        wallet_access_id: WALLET_ACCESS_ID,
+        wallet_id: WALLET_ID,
         chain: CHAIN_ID,
         valid_from: None,
         valid_until: None,
         max_gas_fee_per_gas: None,
         max_priority_fee_per_gas: None,
         rate_limit: None,
+        client_id: CLIENT_ID,
     }
 }
 
+// ── analyze ─────────────────────────────────────────────────────────────
+
 #[test]
 fn analyze_matches_empty_calldata() {
     let m = EtherTransfer::analyze(&ctx(ALLOWED, U256::from(1_000u64))).unwrap();
@@ -100,6 +96,8 @@ fn analyze_rejects_nonempty_calldata() {
     assert!(EtherTransfer::analyze(&context).is_none());
 }
 
+// ── evaluate ────────────────────────────────────────────────────────────
+
 #[tokio::test]
 async fn evaluate_passes_for_allowed_target() {
     let db = db::create_test_pool().await;
@@ -107,11 +105,9 @@ async fn evaluate_passes_for_allowed_target() {
 
     let grant = Grant {
         id: 999,
-        common_settings_id: 999,
+        shared_grant_id: 999,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings: make_settings(vec![ALLOWED], 1_000_000),
-            specific: make_settings(vec![ALLOWED], 1_000_000),
-        },
     };
     let context = ctx(ALLOWED, U256::from(100u64));
     let m = EtherTransfer::analyze(&context).unwrap();
@@ -128,11 +124,9 @@ async fn evaluate_rejects_disallowed_target() {
 
     let grant = Grant {
         id: 999,
-        common_settings_id: 999,
+        shared_grant_id: 999,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings: make_settings(vec![ALLOWED], 1_000_000),
-            specific: make_settings(vec![ALLOWED], 1_000_000),
-        },
     };
     let context = ctx(OTHER, U256::from(100u64));
     let m = EtherTransfer::analyze(&context).unwrap();
@@ -159,7 +153,8 @@ async fn evaluate_passes_when_volume_within_limit() {
     insert_into(evm_transaction_log::table)
         .values(NewEvmTransactionLog {
             grant_id,
-            wallet_access_id: WALLET_ACCESS_ID,
+            client_id: CLIENT_ID,
+            wallet_id: WALLET_ID,
             chain_id: CHAIN_ID as i32,
             eth_value: utils::u256_to_bytes(U256::from(500u64)).to_vec(),
             signed_at: SqliteTimestamp(Utc::now()),
@@ -170,11 +165,9 @@ async fn evaluate_passes_when_volume_within_limit() {
 
     let grant = Grant {
         id: grant_id,
-        common_settings_id: basic.id,
+        shared_grant_id: basic.id,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings,
-            specific: settings,
-        },
     };
     let context = ctx(ALLOWED, U256::from(100u64));
     let m = EtherTransfer::analyze(&context).unwrap();
@@ -201,9 +194,10 @@ async fn evaluate_rejects_volume_over_limit() {
     insert_into(evm_transaction_log::table)
         .values(NewEvmTransactionLog {
             grant_id,
-            wallet_access_id: WALLET_ACCESS_ID,
+            client_id: CLIENT_ID,
+            wallet_id: WALLET_ID,
             chain_id: CHAIN_ID as i32,
-            eth_value: utils::u256_to_bytes(U256::from(1_000u64)).to_vec(),
+            eth_value: utils::u256_to_bytes(U256::from(1_001u64)).to_vec(),
             signed_at: SqliteTimestamp(Utc::now()),
         })
         .execute(&mut *conn)
@@ -212,13 +206,11 @@ async fn evaluate_rejects_volume_over_limit() {
 
     let grant = Grant {
         id: grant_id,
-        common_settings_id: basic.id,
+        shared_grant_id: basic.id,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings,
-            specific: settings,
-        },
     };
-    let context = ctx(ALLOWED, U256::from(1u64));
+    let context = ctx(ALLOWED, U256::from(100u64));
     let m = EtherTransfer::analyze(&context).unwrap();
     let v = EtherTransfer::evaluate(&context, &m, &grant, &mut *conn)
         .await
@@ -240,13 +232,14 @@ async fn evaluate_passes_at_exactly_volume_limit() {
         .await
         .unwrap();
 
-    // Exactly at the limit including current transfer — check is `>`, so this should not violate
+    // Exactly at the limit — the check is `>`, so this should not violate
     insert_into(evm_transaction_log::table)
         .values(NewEvmTransactionLog {
             grant_id,
-            wallet_access_id: WALLET_ACCESS_ID,
+            client_id: CLIENT_ID,
+            wallet_id: WALLET_ID,
             chain_id: CHAIN_ID as i32,
-            eth_value: utils::u256_to_bytes(U256::from(900u64)).to_vec(),
+            eth_value: utils::u256_to_bytes(U256::from(1_000u64)).to_vec(),
             signed_at: SqliteTimestamp(Utc::now()),
         })
         .execute(&mut *conn)
@@ -255,11 +248,9 @@ async fn evaluate_passes_at_exactly_volume_limit() {
 
     let grant = Grant {
         id: grant_id,
-        common_settings_id: basic.id,
+        shared_grant_id: basic.id,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings,
-            specific: settings,
-        },
     };
     let context = ctx(ALLOWED, U256::from(100u64));
     let m = EtherTransfer::analyze(&context).unwrap();
@@ -272,6 +263,8 @@ async fn evaluate_passes_at_exactly_volume_limit() {
     );
 }
 
+// ── try_find_grant ───────────────────────────────────────────────────────
+
 #[tokio::test]
 async fn try_find_grant_roundtrip() {
     let db = db::create_test_pool().await;
@@ -289,11 +282,8 @@ async fn try_find_grant_roundtrip() {
 
     assert!(found.is_some());
     let g = found.unwrap();
-    assert_eq!(g.settings.specific.target, vec![ALLOWED]);
+    assert_eq!(g.settings.target, vec![ALLOWED]);
-    assert_eq!(
+    assert_eq!(g.settings.limit.max_volume, U256::from(1_000_000u64));
-        g.settings.specific.limit.max_volume,
-        U256::from(1_000_000u64)
-    );
 }
 
 #[tokio::test]
@@ -330,36 +320,7 @@ async fn try_find_grant_wrong_target_returns_none() {
     assert!(found.is_none());
 }
 
-proptest::proptest! {
+// ── find_all_grants ──────────────────────────────────────────────────────
-    #[test]
-    fn target_order_does_not_affect_hash(
-        raw_addrs in proptest::collection::vec(proptest::prelude::any::<[u8; 20]>(), 0..8),
-        seed in proptest::prelude::any::<u64>(),
-        max_volume in proptest::prelude::any::<u64>(),
-        window_secs in 1i64..=86400,
-    ) {
-        use rand::{SeedableRng, seq::SliceRandom};
-        use sha2::Digest;
-        use arbiter_crypto::hashing::Hashable;
-
-        let addrs: Vec<Address> = raw_addrs.iter().map(|b| Address::from(*b)).collect();
-        let mut shuffled = addrs.clone();
-        shuffled.shuffle(&mut rand::rngs::StdRng::seed_from_u64(seed));
-
-        let limit = VolumeRateLimit {
-            max_volume: U256::from(max_volume),
-            window: Duration::seconds(window_secs),
-        };
-
-        let mut h1 = sha2::Sha256::new();
-        Settings { target: addrs, limit: limit.clone() }.hash(&mut h1);
-
-        let mut h2 = sha2::Sha256::new();
-        Settings { target: shuffled, limit }.hash(&mut h2);
-
-        proptest::prop_assert_eq!(h1.finalize(), h2.finalize());
-    }
-}
 
 #[tokio::test]
 async fn find_all_grants_empty_db() {
@@ -386,7 +347,7 @@ async fn find_all_grants_excludes_revoked() {
 
     let all = EtherTransfer::find_all_grants(&mut *conn).await.unwrap();
     assert_eq!(all.len(), 1);
-    assert_eq!(all[0].settings.specific.target, vec![ALLOWED]);
+    assert_eq!(all[0].settings.target, vec![ALLOWED]);
 }
 
 #[tokio::test]
@@ -402,11 +363,8 @@ async fn find_all_grants_multiple_targets() {
 
     let all = EtherTransfer::find_all_grants(&mut *conn).await.unwrap();
     assert_eq!(all.len(), 1);
-    assert_eq!(all[0].settings.specific.target.len(), 2);
+    assert_eq!(all[0].settings.target.len(), 2);
-    assert_eq!(
+    assert_eq!(all[0].settings.limit.max_volume, U256::from(1_000_000u64));
-        all[0].settings.specific.limit.max_volume,
-        U256::from(1_000_000u64)
-    );
 }
 
 #[tokio::test]

server/crates/arbiter-server/src/evm/policies/token_transfers/mod.rs

@@ -1,5 +1,20 @@
 use std::collections::HashMap;
 
+use alloy::{
+    primitives::{Address, U256},
+    sol_types::SolCall,
+};
+use arbiter_tokens_registry::evm::nonfungible::{self, TokenInfo};
+use chrono::{DateTime, Duration, Utc};
+use diesel::dsl::{auto_type, insert_into};
+use diesel::sqlite::Sqlite;
+use diesel::{ExpressionMethods, prelude::*};
+use diesel_async::{AsyncConnection, RunQueryDsl};
+
+use crate::db::models::{
+    EvmBasicGrant, EvmTokenTransferGrant, EvmTokenTransferVolumeLimit, NewEvmTokenTransferGrant,
+    NewEvmTokenTransferLog, NewEvmTokenTransferVolumeLimit, SqliteTimestamp,
+};
 use crate::db::schema::{
     evm_basic_grant, evm_token_transfer_grant, evm_token_transfer_log,
     evm_token_transfer_volume_limit,
@@ -11,25 +26,6 @@ use crate::evm::{
     },
     utils,
 };
-use crate::{
-    crypto::integrity::Integrable,
-    db::models::{
-        EvmBasicGrant, EvmTokenTransferGrant, EvmTokenTransferVolumeLimit,
-        NewEvmTokenTransferGrant, NewEvmTokenTransferLog, NewEvmTokenTransferVolumeLimit,
-        SqliteTimestamp,
-    },
-    evm::policies::CombinedSettings,
-};
-use alloy::{
-    primitives::{Address, U256},
-    sol_types::SolCall,
-};
-use arbiter_tokens_registry::evm::nonfungible::{self, TokenInfo};
-use chrono::{DateTime, Duration, Utc};
-use diesel::dsl::{auto_type, insert_into};
-use diesel::sqlite::Sqlite;
-use diesel::{ExpressionMethods, prelude::*};
-use diesel_async::{AsyncConnection, RunQueryDsl};
 
 use super::{DatabaseID, EvalContext, EvalViolation};
 
@@ -42,9 +38,9 @@ fn grant_join() -> _ {
 
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct Meaning {
-    pub token: &'static TokenInfo,
+    token: &'static TokenInfo,
-    pub to: Address,
+    to: Address,
-    pub value: U256,
+    value: U256,
 }
 impl std::fmt::Display for Meaning {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
@@ -62,16 +58,12 @@ impl From<Meaning> for SpecificMeaning {
 }
 
 // A grant for token transfers, which can be scoped to specific target addresses and volume limits
-#[derive(Debug, Clone, arbiter_macros::Hashable)]
+#[derive(Debug, Clone)]
 pub struct Settings {
     pub token_contract: Address,
     pub target: Option<Address>,
     pub volume_limits: Vec<VolumeRateLimit>,
 }
-impl Integrable for Settings {
-    const KIND: &'static str = "TokenTransfer";
-}
-
 impl From<Settings> for SpecificGrant {
     fn from(val: Settings) -> SpecificGrant {
         SpecificGrant::TokenTransfer(val)
@@ -109,32 +101,24 @@ async fn query_relevant_past_transfers(
 
 async fn check_volume_rate_limits(
     grant: &Grant<Settings>,
-    current_transfer_value: U256,
     db: &mut impl AsyncConnection<Backend = Sqlite>,
 ) -> QueryResult<Vec<EvalViolation>> {
     let mut violations = Vec::new();
 
-    let Some(longest_window) = grant
+    let Some(longest_window) = grant.settings.volume_limits.iter().map(|l| l.window).max() else {
-        .settings
-        .specific
-        .volume_limits
-        .iter()
-        .map(|l| l.window)
-        .max()
-    else {
         return Ok(violations);
     };
 
     let past_transfers = query_relevant_past_transfers(grant.id, longest_window, db).await?;
 
-    for limit in &grant.settings.specific.volume_limits {
+    for limit in &grant.settings.volume_limits {
         let window_start = chrono::Utc::now() - limit.window;
-        let prospective_cumulative_volume: U256 = past_transfers
+        let cumulative_volume: U256 = past_transfers
             .iter()
             .filter(|(_, timestamp)| timestamp >= &window_start)
-            .fold(current_transfer_value, |acc, (value, _)| acc + *value);
+            .fold(U256::default(), |acc, (value, _)| acc + *value);
 
-        if prospective_cumulative_volume > limit.max_volume {
+        if cumulative_volume > limit.max_volume {
             violations.push(EvalViolation::VolumetricLimitExceeded);
             break;
         }
@@ -173,13 +157,13 @@ impl Policy for TokenTransfer {
             return Ok(violations);
         }
 
-        if let Some(allowed) = grant.settings.specific.target
+        if let Some(allowed) = grant.settings.target
             && allowed != meaning.to
         {
             violations.push(EvalViolation::InvalidTarget { target: meaning.to });
         }
 
-        let rate_violations = check_volume_rate_limits(grant, meaning.value, db).await?;
+        let rate_violations = check_volume_rate_limits(grant, db).await?;
         violations.extend(rate_violations);
 
         Ok(violations)
@@ -225,7 +209,8 @@ impl Policy for TokenTransfer {
 
         let grant: Option<(EvmBasicGrant, EvmTokenTransferGrant)> = grant_join()
             .filter(evm_basic_grant::revoked_at.is_null())
-            .filter(evm_basic_grant::wallet_access_id.eq(context.target.id))
+            .filter(evm_basic_grant::wallet_id.eq(context.wallet_id))
+            .filter(evm_basic_grant::client_id.eq(context.client_id))
             .filter(evm_token_transfer_grant::token_contract.eq(&token_contract_bytes))
             .select((
                 EvmBasicGrant::as_select(),
@@ -284,11 +269,9 @@ impl Policy for TokenTransfer {
 
         Ok(Some(Grant {
             id: token_grant.id,
-            common_settings_id: token_grant.basic_grant_id,
+            shared_grant_id: token_grant.basic_grant_id,
-            settings: CombinedSettings {
+            shared: SharedGrantSettings::try_from_model(basic_grant)?,
-                shared: SharedGrantSettings::try_from_model(basic_grant)?,
+            settings,
-                specific: settings,
-            },
         }))
     }
 
@@ -386,14 +369,12 @@ impl Policy for TokenTransfer {
 
                 Ok(Grant {
                     id: specific.id,
-                    common_settings_id: specific.basic_grant_id,
+                    shared_grant_id: specific.basic_grant_id,
-                    settings: CombinedSettings {
+                    shared: SharedGrantSettings::try_from_model(basic)?,
-                        shared: SharedGrantSettings::try_from_model(basic)?,
+                    settings: Settings {
-                        specific: Settings {
+                        token_contract: Address::from(token_contract),
-                            token_contract: Address::from(token_contract),
+                        target,
-                            target,
+                        volume_limits,
-                            volume_limits,
-                        },
                     },
                 })
             })

server/crates/arbiter-server/src/evm/policies/token_transfers/tests.rs

@@ -6,15 +6,12 @@ use diesel_async::RunQueryDsl;
 
 use crate::db::{
     self, DatabaseConnection,
-    models::{EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, SqliteTimestamp},
+    models::{EvmBasicGrant, NewEvmBasicGrant, SqliteTimestamp},
     schema::evm_basic_grant,
 };
 use crate::evm::{
     abi::IERC20::transferCall,
-    policies::{
+    policies::{EvalContext, EvalViolation, Grant, Policy, SharedGrantSettings, VolumeRateLimit},
-        CombinedSettings, EvalContext, EvalViolation, Grant, Policy, SharedGrantSettings,
-        VolumeRateLimit,
-    },
     utils,
 };
 
@@ -24,7 +21,8 @@ use super::{Settings, TokenTransfer};
 const CHAIN_ID: u64 = 1;
 const DAI: Address = address!("6B175474E89094C44Da98b954EedeAC495271d0F");
 
-const WALLET_ACCESS_ID: i32 = 1;
+const WALLET_ID: i32 = 1;
+const CLIENT_ID: i32 = 2;
 
 const RECIPIENT: Address = address!("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa");
 const OTHER: Address = address!("bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb");
@@ -40,12 +38,8 @@ fn transfer_calldata(to: Address, value: U256) -> Bytes {
 
 fn ctx(to: Address, calldata: Bytes) -> EvalContext {
     EvalContext {
-        target: EvmWalletAccess {
+        wallet_id: WALLET_ID,
-            id: WALLET_ACCESS_ID,
+        client_id: CLIENT_ID,
-            wallet_id: 10,
-            client_id: 20,
-            created_at: SqliteTimestamp(Utc::now()),
-        },
         chain: CHAIN_ID,
         to,
         value: U256::ZERO,
@@ -58,7 +52,8 @@ fn ctx(to: Address, calldata: Bytes) -> EvalContext {
 async fn insert_basic(conn: &mut DatabaseConnection, revoked: bool) -> EvmBasicGrant {
     insert_into(evm_basic_grant::table)
         .values(NewEvmBasicGrant {
-            wallet_access_id: WALLET_ACCESS_ID,
+            wallet_id: WALLET_ID,
+            client_id: CLIENT_ID,
             chain_id: CHAIN_ID as i32,
             valid_from: None,
             valid_until: None,
@@ -91,16 +86,19 @@ fn make_settings(target: Option<Address>, max_volume: Option<u64>) -> Settings {
 
 fn shared() -> SharedGrantSettings {
     SharedGrantSettings {
-        wallet_access_id: WALLET_ACCESS_ID,
+        wallet_id: WALLET_ID,
         chain: CHAIN_ID,
         valid_from: None,
         valid_until: None,
         max_gas_fee_per_gas: None,
         max_priority_fee_per_gas: None,
         rate_limit: None,
+        client_id: CLIENT_ID,
     }
 }
 
+// ── analyze ─────────────────────────────────────────────────────────────
+
 #[test]
 fn analyze_known_token_valid_calldata() {
     let calldata = transfer_calldata(RECIPIENT, U256::from(100u64));
@@ -126,6 +124,8 @@ fn analyze_empty_calldata_returns_none() {
     assert!(TokenTransfer::analyze(&ctx(DAI, Bytes::new())).is_none());
 }
 
+// ── evaluate ────────────────────────────────────────────────────────────
+
 #[tokio::test]
 async fn evaluate_rejects_nonzero_eth_value() {
     let db = db::create_test_pool().await;
@@ -133,11 +133,9 @@ async fn evaluate_rejects_nonzero_eth_value() {
 
     let grant = Grant {
         id: 999,
-        common_settings_id: 999,
+        shared_grant_id: 999,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings: make_settings(None, None),
-            specific: make_settings(None, None),
-        },
     };
     let calldata = transfer_calldata(RECIPIENT, U256::from(100u64));
     let mut context = ctx(DAI, calldata);
@@ -164,11 +162,9 @@ async fn evaluate_passes_any_recipient_when_no_restriction() {
 
     let grant = Grant {
         id: 999,
-        common_settings_id: 999,
+        shared_grant_id: 999,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings: make_settings(None, None),
-            specific: make_settings(None, None),
-        },
     };
     let calldata = transfer_calldata(RECIPIENT, U256::from(100u64));
     let context = ctx(DAI, calldata);
@@ -186,11 +182,9 @@ async fn evaluate_passes_matching_restricted_recipient() {
 
     let grant = Grant {
         id: 999,
-        common_settings_id: 999,
+        shared_grant_id: 999,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings: make_settings(Some(RECIPIENT), None),
-            specific: make_settings(Some(RECIPIENT), None),
-        },
     };
     let calldata = transfer_calldata(RECIPIENT, U256::from(100u64));
     let context = ctx(DAI, calldata);
@@ -208,11 +202,9 @@ async fn evaluate_rejects_wrong_restricted_recipient() {
 
     let grant = Grant {
         id: 999,
-        common_settings_id: 999,
+        shared_grant_id: 999,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings: make_settings(Some(RECIPIENT), None),
-            specific: make_settings(Some(RECIPIENT), None),
-        },
     };
     let calldata = transfer_calldata(OTHER, U256::from(100u64));
     let context = ctx(DAI, calldata);
@@ -227,7 +219,7 @@ async fn evaluate_rejects_wrong_restricted_recipient() {
 }
 
 #[tokio::test]
-async fn evaluate_passes_volume_at_exact_limit() {
+async fn evaluate_passes_volume_within_limit() {
     let db = db::create_test_pool().await;
     let mut conn = db.get().await.unwrap();
 
@@ -237,7 +229,7 @@ async fn evaluate_passes_volume_at_exact_limit() {
         .await
         .unwrap();
 
-    // Record a past transfer of 900, with current transfer 100 => exactly 1000 limit
+    // Record a past transfer of 500 (within 1000 limit)
     use crate::db::{models::NewEvmTokenTransferLog, schema::evm_token_transfer_log};
     insert_into(evm_token_transfer_log::table)
         .values(NewEvmTokenTransferLog {
@@ -246,7 +238,7 @@ async fn evaluate_passes_volume_at_exact_limit() {
             chain_id: CHAIN_ID as i32,
             token_contract: DAI.to_vec(),
             recipient_address: RECIPIENT.to_vec(),
-            value: utils::u256_to_bytes(U256::from(900u64)).to_vec(),
+            value: utils::u256_to_bytes(U256::from(500u64)).to_vec(),
         })
         .execute(&mut *conn)
         .await
@@ -254,11 +246,9 @@ async fn evaluate_passes_volume_at_exact_limit() {
 
     let grant = Grant {
         id: grant_id,
-        common_settings_id: basic.id,
+        shared_grant_id: basic.id,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings,
-            specific: settings,
-        },
     };
     let calldata = transfer_calldata(RECIPIENT, U256::from(100u64));
     let context = ctx(DAI, calldata);
@@ -291,7 +281,7 @@ async fn evaluate_rejects_volume_over_limit() {
             chain_id: CHAIN_ID as i32,
             token_contract: DAI.to_vec(),
             recipient_address: RECIPIENT.to_vec(),
-            value: utils::u256_to_bytes(U256::from(1_000u64)).to_vec(),
+            value: utils::u256_to_bytes(U256::from(1_001u64)).to_vec(),
         })
         .execute(&mut *conn)
         .await
@@ -299,13 +289,11 @@ async fn evaluate_rejects_volume_over_limit() {
 
     let grant = Grant {
         id: grant_id,
-        common_settings_id: basic.id,
+        shared_grant_id: basic.id,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings,
-            specific: settings,
-        },
     };
-    let calldata = transfer_calldata(RECIPIENT, U256::from(1u64));
+    let calldata = transfer_calldata(RECIPIENT, U256::from(100u64));
     let context = ctx(DAI, calldata);
     let m = TokenTransfer::analyze(&context).unwrap();
     let v = TokenTransfer::evaluate(&context, &m, &grant, &mut *conn)
@@ -324,11 +312,9 @@ async fn evaluate_no_volume_limits_always_passes() {
 
     let grant = Grant {
         id: 999,
-        common_settings_id: 999,
+        shared_grant_id: 999,
-        settings: CombinedSettings {
+        shared: shared(),
-            shared: shared(),
+        settings: make_settings(None, None), // no volume limits
-            specific: make_settings(None, None), // no volume limits
-        },
     };
     let calldata = transfer_calldata(RECIPIENT, U256::from(u64::MAX));
     let context = ctx(DAI, calldata);
@@ -362,13 +348,10 @@ async fn try_find_grant_roundtrip() {
 
     assert!(found.is_some());
     let g = found.unwrap();
-    assert_eq!(g.settings.specific.token_contract, DAI);
+    assert_eq!(g.settings.token_contract, DAI);
-    assert_eq!(g.settings.specific.target, Some(RECIPIENT));
+    assert_eq!(g.settings.target, Some(RECIPIENT));
-    assert_eq!(g.settings.specific.volume_limits.len(), 1);
+    assert_eq!(g.settings.volume_limits.len(), 1);
-    assert_eq!(
+    assert_eq!(g.settings.volume_limits[0].max_volume, U256::from(5_000u64));
-        g.settings.specific.volume_limits[0].max_volume,
-        U256::from(5_000u64)
-    );
 }
 
 #[tokio::test]
@@ -408,39 +391,7 @@ async fn try_find_grant_unknown_token_returns_none() {
     assert!(found.is_none());
 }
 
-proptest::proptest! {
+// ── find_all_grants ──────────────────────────────────────────────────────
-    #[test]
-    fn volume_limits_order_does_not_affect_hash(
-        raw_limits in proptest::collection::vec(
-            (proptest::prelude::any::<u64>(), 1i64..=86400),
-            0..8,
-        ),
-        seed in proptest::prelude::any::<u64>(),
-    ) {
-        use rand::{SeedableRng, seq::SliceRandom};
-        use sha2::Digest;
-        use arbiter_crypto::hashing::Hashable;
-
-        let limits: Vec<VolumeRateLimit> = raw_limits
-            .iter()
-            .map(|(max_vol, window_secs)| VolumeRateLimit {
-                max_volume: U256::from(*max_vol),
-                window: Duration::seconds(*window_secs),
-            })
-            .collect();
-
-        let mut shuffled = limits.clone();
-        shuffled.shuffle(&mut rand::rngs::StdRng::seed_from_u64(seed));
-
-        let mut h1 = sha2::Sha256::new();
-        Settings { token_contract: DAI, target: None, volume_limits: limits }.hash(&mut h1);
-
-        let mut h2 = sha2::Sha256::new();
-        Settings { token_contract: DAI, target: None, volume_limits: shuffled }.hash(&mut h2);
-
-        proptest::prop_assert_eq!(h1.finalize(), h2.finalize());
-    }
-}
 
 #[tokio::test]
 async fn find_all_grants_empty_db() {
@@ -482,9 +433,9 @@ async fn find_all_grants_loads_volume_limits() {
 
     let all = TokenTransfer::find_all_grants(&mut *conn).await.unwrap();
     assert_eq!(all.len(), 1);
-    assert_eq!(all[0].settings.specific.volume_limits.len(), 1);
+    assert_eq!(all[0].settings.volume_limits.len(), 1);
     assert_eq!(
-        all[0].settings.specific.volume_limits[0].max_volume,
+        all[0].settings.volume_limits[0].max_volume,
         U256::from(9_999u64)
     );
 }

server/crates/arbiter-server/src/evm/safe_signer.rs

@@ -1,12 +1,12 @@
 use std::sync::Mutex;
 
+use crate::safe_cell::{SafeCell, SafeCellHandle as _};
 use alloy::{
     consensus::SignableTransaction,
     network::{TxSigner, TxSignerSync},
     primitives::{Address, B256, ChainId, Signature},
     signers::{Error, Result, Signer, SignerSync, utils::secret_key_to_address},
 };
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
 use async_trait::async_trait;
 use k256::ecdsa::{self, RecoveryId, SigningKey, signature::hazmat::PrehashSigner};
 

server/crates/arbiter-server/src/grpc/client.rs

@@ -1,24 +1,31 @@
 use arbiter_proto::{
     proto::client::{
-        ClientRequest, ClientResponse, client_request::Payload as ClientRequestPayload,
+        ClientRequest, ClientResponse, VaultState as ProtoVaultState,
+        client_request::Payload as ClientRequestPayload,
         client_response::Payload as ClientResponsePayload,
     },
     transport::{Receiver, Sender, grpc::GrpcBi},
 };
-use kameo::actor::{ActorRef, Spawn as _};
+use kameo::{
+    actor::{ActorRef, Spawn as _},
+    error::SendError,
+};
 use tonic::Status;
 use tracing::{info, warn};
 
 use crate::{
-    actors::client::{ClientConnection, session::ClientSession},
+    actors::{
+        client::{
+            self, ClientConnection,
+            session::{ClientSession, Error, HandleQueryVaultState},
+        },
+        keyholder::KeyHolderState,
+    },
     grpc::request_tracker::RequestTracker,
+    utils::defer,
 };
 
 mod auth;
-mod evm;
-mod inbound;
-mod outbound;
-mod vault;
 
 async fn dispatch_loop(
     mut bi: GrpcBi<ClientRequest, ClientResponse>,
@@ -26,91 +33,105 @@ async fn dispatch_loop(
     mut request_tracker: RequestTracker,
 ) {
     loop {
-        let Some(message) = bi.recv().await else {
+        let Some(conn) = bi.recv().await else {
             return;
         };
 
-        let conn = match message {
+        if dispatch_conn_message(&mut bi, &actor, &mut request_tracker, conn)
-            Ok(conn) => conn,
+            .await
-            Err(err) => {
+            .is_err()
-                warn!(error = ?err, "Failed to receive client request");
+        {
-                return;
-            }
-        };
-
-        let request_id = match request_tracker.request(conn.request_id) {
-            Ok(id) => id,
-            Err(err) => {
-                let _ = bi.send(Err(err)).await;
-                return;
-            }
-        };
-
-        let Some(payload) = conn.payload else {
-            let _ = bi
-                .send(Err(Status::invalid_argument(
-                    "Missing client request payload",
-                )))
-                .await;
             return;
-        };
-
-        match dispatch_inner(&actor, payload).await {
-            Ok(response) => {
-                if bi
-                    .send(Ok(ClientResponse {
-                        request_id: Some(request_id),
-                        payload: Some(response),
-                    }))
-                    .await
-                    .is_err()
-                {
-                    return;
-                }
-            }
-            Err(status) => {
-                let _ = bi.send(Err(status)).await;
-                return;
-            }
         }
     }
 }
 
-async fn dispatch_inner(
+async fn dispatch_conn_message(
+    bi: &mut GrpcBi<ClientRequest, ClientResponse>,
     actor: &ActorRef<ClientSession>,
-    payload: ClientRequestPayload,
+    request_tracker: &mut RequestTracker,
-) -> Result<ClientResponsePayload, Status> {
+    conn: Result<ClientRequest, Status>,
-    match payload {
+) -> Result<(), ()> {
-        ClientRequestPayload::Vault(req) => vault::dispatch(actor, req).await,
+    let conn = match conn {
-        ClientRequestPayload::Evm(req) => evm::dispatch(actor, req).await,
+        Ok(conn) => conn,
-        ClientRequestPayload::Auth(..) => {
-            warn!("Unsupported post-auth client auth request");
-            Err(Status::invalid_argument("Unsupported client request"))
-        }
-    }
-}
-
-pub async fn start(mut conn: ClientConnection, mut bi: GrpcBi<ClientRequest, ClientResponse>) {
-    let mut request_tracker = RequestTracker::default();
-
-    let client_id = match auth::start(&mut conn, &mut bi, &mut request_tracker).await {
-        Ok(id) => id,
         Err(err) => {
-            let _ = bi
+            warn!(error = ?err, "Failed to receive client request");
-                .send(Err(Status::unauthenticated(format!(
+            return Err(());
-                    "Authentication failed: {}",
-                    err
-                ))))
-                .await;
-            warn!(error = ?err, "Client authentication failed");
-            return;
         }
     };
 
-    let actor = ClientSession::spawn(ClientSession::new(conn, client_id));
+    let request_id = match request_tracker.request(conn.request_id) {
-    let actor_for_cleanup = actor.clone();
+        Ok(request_id) => request_id,
+        Err(err) => {
+            let _ = bi.send(Err(err)).await;
+            return Err(());
+        }
+    };
+    let Some(payload) = conn.payload else {
+        let _ = bi
+            .send(Err(Status::invalid_argument(
+                "Missing client request payload",
+            )))
+            .await;
+        return Err(());
+    };
 
-    info!("Client authenticated successfully");
+    let payload = match payload {
-    dispatch_loop(bi, actor, request_tracker).await;
+        ClientRequestPayload::QueryVaultState(_) => ClientResponsePayload::VaultState(
-    actor_for_cleanup.kill();
+            match actor.ask(HandleQueryVaultState {}).await {
+                Ok(KeyHolderState::Unbootstrapped) => ProtoVaultState::Unbootstrapped,
+                Ok(KeyHolderState::Sealed) => ProtoVaultState::Sealed,
+                Ok(KeyHolderState::Unsealed) => ProtoVaultState::Unsealed,
+                Err(SendError::HandlerError(Error::Internal)) => ProtoVaultState::Error,
+                Err(err) => {
+                    warn!(error = ?err, "Failed to query vault state");
+                    ProtoVaultState::Error
+                }
+            }
+            .into(),
+        ),
+        payload => {
+            warn!(?payload, "Unsupported post-auth client request");
+            let _ = bi
+                .send(Err(Status::invalid_argument("Unsupported client request")))
+                .await;
+            return Err(());
+        }
+    };
+
+    bi.send(Ok(ClientResponse {
+        request_id: Some(request_id),
+        payload: Some(payload),
+    }))
+    .await
+    .map_err(|_| ())
+}
+
+pub async fn start(conn: ClientConnection, mut bi: GrpcBi<ClientRequest, ClientResponse>) {
+    let mut conn = conn;
+    let mut request_tracker = RequestTracker::default();
+    let mut response_id = None;
+
+    match auth::start(&mut conn, &mut bi, &mut request_tracker, &mut response_id).await {
+        Ok(_) => {
+            let actor =
+                client::session::ClientSession::spawn(client::session::ClientSession::new(conn));
+            let actor_for_cleanup = actor.clone();
+            let _ = defer(move || {
+                actor_for_cleanup.kill();
+            });
+
+            info!("Client authenticated successfully");
+            dispatch_loop(bi, actor, request_tracker).await;
+        }
+        Err(e) => {
+            let mut transport = auth::AuthTransportAdapter::new(
+                &mut bi,
+                &mut request_tracker,
+                &mut response_id,
+            );
+            let _ = transport.send(Err(e.clone())).await;
+            warn!(error = ?e, "Authentication failed");
+        }
+    }
 }

server/crates/arbiter-server/src/grpc/client/auth.rs

@@ -1,19 +1,9 @@
-use arbiter_crypto::authn;
 use arbiter_proto::{
-    ClientMetadata,
+    proto::client::{
-    proto::{
+        AuthChallenge as ProtoAuthChallenge, AuthChallengeRequest as ProtoAuthChallengeRequest,
-        client::{
+        AuthChallengeSolution as ProtoAuthChallengeSolution, AuthResult as ProtoAuthResult,
-            ClientRequest, ClientResponse,
+        ClientRequest, ClientResponse, client_request::Payload as ClientRequestPayload,
-            auth::{
+        client_response::Payload as ClientResponsePayload,
-                self as proto_auth, AuthChallenge as ProtoAuthChallenge,
-                AuthChallengeRequest as ProtoAuthChallengeRequest,
-                AuthChallengeSolution as ProtoAuthChallengeSolution, AuthResult as ProtoAuthResult,
-                request::Payload as AuthRequestPayload, response::Payload as AuthResponsePayload,
-            },
-            client_request::Payload as ClientRequestPayload,
-            client_response::Payload as ClientResponsePayload,
-        },
-        shared::ClientInfo as ProtoClientInfo,
     },
     transport::{Bi, Error as TransportError, Receiver, Sender, grpc::GrpcBi},
 };
@@ -29,47 +19,49 @@ use crate::{
 pub struct AuthTransportAdapter<'a> {
     bi: &'a mut GrpcBi<ClientRequest, ClientResponse>,
     request_tracker: &'a mut RequestTracker,
+    response_id: &'a mut Option<i32>,
 }
 
 impl<'a> AuthTransportAdapter<'a> {
     pub fn new(
         bi: &'a mut GrpcBi<ClientRequest, ClientResponse>,
         request_tracker: &'a mut RequestTracker,
+        response_id: &'a mut Option<i32>,
     ) -> Self {
         Self {
             bi,
             request_tracker,
+            response_id,
         }
     }
 
-    fn response_to_proto(response: auth::Outbound) -> AuthResponsePayload {
+    fn response_to_proto(response: auth::Outbound) -> ClientResponsePayload {
         match response {
             auth::Outbound::AuthChallenge { pubkey, nonce } => {
-                AuthResponsePayload::Challenge(ProtoAuthChallenge {
+                ClientResponsePayload::AuthChallenge(ProtoAuthChallenge {
-                    pubkey: pubkey.to_bytes(),
+                    pubkey: pubkey.to_bytes().to_vec(),
                     nonce,
                 })
             }
             auth::Outbound::AuthSuccess => {
-                AuthResponsePayload::Result(ProtoAuthResult::Success.into())
+                ClientResponsePayload::AuthResult(ProtoAuthResult::Success.into())
             }
         }
     }
 
-    fn error_to_proto(error: auth::Error) -> AuthResponsePayload {
+    fn error_to_proto(error: auth::Error) -> ClientResponsePayload {
-        AuthResponsePayload::Result(
+        ClientResponsePayload::AuthResult(
             match error {
                 auth::Error::InvalidChallengeSolution => ProtoAuthResult::InvalidSignature,
                 auth::Error::ApproveError(auth::ApproveError::Denied) => {
                     ProtoAuthResult::ApprovalDenied
                 }
                 auth::Error::ApproveError(auth::ApproveError::Upstream(
-                    crate::actors::flow_coordinator::ApprovalError::NoUserAgentsConnected,
+                    crate::actors::router::ApprovalError::NoUserAgentsConnected,
                 )) => ProtoAuthResult::NoUserAgentsOnline,
                 auth::Error::ApproveError(auth::ApproveError::Internal)
                 | auth::Error::DatabasePoolUnavailable
                 | auth::Error::DatabaseOperationFailed
-                | auth::Error::IntegrityCheckFailed
                 | auth::Error::Transport => ProtoAuthResult::Internal,
             }
             .into(),
@@ -78,20 +70,20 @@ impl<'a> AuthTransportAdapter<'a> {
 
     async fn send_client_response(
         &mut self,
-        payload: AuthResponsePayload,
+        payload: ClientResponsePayload,
     ) -> Result<(), TransportError> {
+        let request_id = self.response_id.take();
+
         self.bi
             .send(Ok(ClientResponse {
-                request_id: Some(self.request_tracker.current_request_id()),
+                request_id,
-                payload: Some(ClientResponsePayload::Auth(proto_auth::Response {
+                payload: Some(payload),
-                    payload: Some(payload),
-                })),
             }))
             .await
     }
 
     async fn send_auth_result(&mut self, result: ProtoAuthResult) -> Result<(), TransportError> {
-        self.send_client_response(AuthResponsePayload::Result(result.into()))
+        self.send_client_response(ClientResponsePayload::AuthResult(result.into()))
             .await
     }
 }
@@ -122,56 +114,33 @@ impl Receiver<auth::Inbound> for AuthTransportAdapter<'_> {
             }
         };
 
-        match self.request_tracker.request(request.request_id) {
+        let request_id = match self.request_tracker.request(request.request_id) {
             Ok(request_id) => request_id,
             Err(error) => {
                 let _ = self.bi.send(Err(error)).await;
                 return None;
             }
         };
+        *self.response_id = Some(request_id);
+
         let payload = request.payload?;
-        let ClientRequestPayload::Auth(auth_request) = payload else {
-            let _ = self
-                .bi
-                .send(Err(Status::invalid_argument(
-                    "Unsupported client auth request",
-                )))
-                .await;
-            return None;
-        };
-        let Some(payload) = auth_request.payload else {
-            let _ = self
-                .bi
-                .send(Err(Status::invalid_argument(
-                    "Missing client auth request payload",
-                )))
-                .await;
-            return None;
-        };
 
         match payload {
-            AuthRequestPayload::ChallengeRequest(ProtoAuthChallengeRequest {
+            ClientRequestPayload::AuthChallengeRequest(ProtoAuthChallengeRequest { pubkey }) => {
-                pubkey,
+                let Ok(pubkey) = <[u8; 32]>::try_from(pubkey) else {
-                client_info,
-            }) => {
-                let Some(client_info) = client_info else {
-                    let _ = self
-                        .bi
-                        .send(Err(Status::invalid_argument("Missing client info")))
-                        .await;
-                    return None;
-                };
-                let Ok(pubkey) = authn::PublicKey::try_from(pubkey.as_slice()) else {
                     let _ = self.send_auth_result(ProtoAuthResult::InvalidKey).await;
                     return None;
                 };
-                Some(auth::Inbound::AuthChallengeRequest {
+                let Ok(pubkey) = ed25519_dalek::VerifyingKey::from_bytes(&pubkey) else {
-                    pubkey,
+                    let _ = self.send_auth_result(ProtoAuthResult::InvalidKey).await;
-                    metadata: client_metadata_from_proto(client_info),
+                    return None;
-                })
+                };
+                Some(auth::Inbound::AuthChallengeRequest { pubkey })
             }
-            AuthRequestPayload::ChallengeSolution(ProtoAuthChallengeSolution { signature }) => {
+            ClientRequestPayload::AuthChallengeSolution(ProtoAuthChallengeSolution {
-                let Ok(signature) = authn::Signature::try_from(signature.as_slice()) else {
+                signature,
+            }) => {
+                let Ok(signature) = ed25519_dalek::Signature::try_from(signature.as_slice()) else {
                     let _ = self
                         .send_auth_result(ProtoAuthResult::InvalidSignature)
                         .await;
@@ -179,25 +148,26 @@ impl Receiver<auth::Inbound> for AuthTransportAdapter<'_> {
                 };
                 Some(auth::Inbound::AuthChallengeSolution { signature })
             }
+            _ => {
+                let _ = self
+                    .bi
+                    .send(Err(Status::invalid_argument("Unsupported client auth request")))
+                    .await;
+                None
+            }
         }
     }
 }
 
 impl Bi<auth::Inbound, Result<auth::Outbound, auth::Error>> for AuthTransportAdapter<'_> {}
 
-fn client_metadata_from_proto(metadata: ProtoClientInfo) -> ClientMetadata {
-    ClientMetadata {
-        name: metadata.name,
-        description: metadata.description,
-        version: metadata.version,
-    }
-}
-
 pub async fn start(
     conn: &mut ClientConnection,
     bi: &mut GrpcBi<ClientRequest, ClientResponse>,
     request_tracker: &mut RequestTracker,
-) -> Result<i32, auth::Error> {
+    response_id: &mut Option<i32>,
-    let mut transport = AuthTransportAdapter::new(bi, request_tracker);
+) -> Result<(), auth::Error> {
-    client::auth::authenticate(conn, &mut transport).await
+    let mut transport = AuthTransportAdapter::new(bi, request_tracker, response_id);
+    client::auth::authenticate(conn, &mut transport).await?;
+    Ok(())
 }

server/crates/arbiter-server/src/grpc/client/evm.rs

@@ -1,87 +0,0 @@
-use arbiter_proto::proto::{
-    client::{
-        client_response::Payload as ClientResponsePayload,
-        evm::{
-            self as proto_evm, request::Payload as EvmRequestPayload,
-            response::Payload as EvmResponsePayload,
-        },
-    },
-    evm::{
-        EvmError as ProtoEvmError, EvmSignTransactionResponse,
-        evm_sign_transaction_response::Result as EvmSignTransactionResult,
-    },
-};
-use kameo::actor::ActorRef;
-use tonic::Status;
-use tracing::warn;
-
-use crate::{
-    actors::client::session::{ClientSession, HandleSignTransaction, SignTransactionRpcError},
-    grpc::{
-        Convert, TryConvert,
-        common::inbound::{RawEvmAddress, RawEvmTransaction},
-    },
-};
-
-fn wrap_response(payload: EvmResponsePayload) -> ClientResponsePayload {
-    ClientResponsePayload::Evm(proto_evm::Response {
-        payload: Some(payload),
-    })
-}
-
-pub(super) async fn dispatch(
-    actor: &ActorRef<ClientSession>,
-    req: proto_evm::Request,
-) -> Result<ClientResponsePayload, Status> {
-    let Some(payload) = req.payload else {
-        return Err(Status::invalid_argument(
-            "Missing client EVM request payload",
-        ));
-    };
-
-    match payload {
-        EvmRequestPayload::SignTransaction(request) => {
-            let address = RawEvmAddress(request.wallet_address).try_convert()?;
-            let transaction = RawEvmTransaction(request.rlp_transaction).try_convert()?;
-
-            let response = match actor
-                .ask(HandleSignTransaction {
-                    wallet_address: address,
-                    transaction,
-                })
-                .await
-            {
-                Ok(signature) => EvmSignTransactionResponse {
-                    result: Some(EvmSignTransactionResult::Signature(
-                        signature.as_bytes().to_vec(),
-                    )),
-                },
-                Err(kameo::error::SendError::HandlerError(SignTransactionRpcError::Vet(
-                    vet_error,
-                ))) => EvmSignTransactionResponse {
-                    result: Some(vet_error.convert()),
-                },
-                Err(kameo::error::SendError::HandlerError(SignTransactionRpcError::Internal)) => {
-                    EvmSignTransactionResponse {
-                        result: Some(EvmSignTransactionResult::Error(
-                            ProtoEvmError::Internal.into(),
-                        )),
-                    }
-                }
-                Err(err) => {
-                    warn!(error = ?err, "Failed to sign EVM transaction");
-                    EvmSignTransactionResponse {
-                        result: Some(EvmSignTransactionResult::Error(
-                            ProtoEvmError::Internal.into(),
-                        )),
-                    }
-                }
-            };
-
-            Ok(wrap_response(EvmResponsePayload::SignTransaction(response)))
-        }
-        EvmRequestPayload::AnalyzeTransaction(_) => Err(Status::unimplemented(
-            "EVM transaction analysis is not yet implemented",
-        )),
-    }
-}

server/crates/arbiter-server/src/grpc/client/inbound.rs

@@ -1 +0,0 @@
-

server/crates/arbiter-server/src/grpc/client/outbound.rs

@@ -1 +0,0 @@
-

server/crates/arbiter-server/src/grpc/client/vault.rs

@@ -1,47 +0,0 @@
-use arbiter_proto::proto::{
-    client::{
-        client_response::Payload as ClientResponsePayload,
-        vault::{
-            self as proto_vault, request::Payload as VaultRequestPayload,
-            response::Payload as VaultResponsePayload,
-        },
-    },
-    shared::VaultState as ProtoVaultState,
-};
-use kameo::{actor::ActorRef, error::SendError};
-use tonic::Status;
-use tracing::warn;
-
-use crate::actors::{
-    client::session::{ClientSession, Error, HandleQueryVaultState},
-    keyholder::KeyHolderState,
-};
-
-pub(super) async fn dispatch(
-    actor: &ActorRef<ClientSession>,
-    req: proto_vault::Request,
-) -> Result<ClientResponsePayload, Status> {
-    let Some(payload) = req.payload else {
-        return Err(Status::invalid_argument(
-            "Missing client vault request payload",
-        ));
-    };
-
-    match payload {
-        VaultRequestPayload::QueryState(_) => {
-            let state = match actor.ask(HandleQueryVaultState {}).await {
-                Ok(KeyHolderState::Unbootstrapped) => ProtoVaultState::Unbootstrapped,
-                Ok(KeyHolderState::Sealed) => ProtoVaultState::Sealed,
-                Ok(KeyHolderState::Unsealed) => ProtoVaultState::Unsealed,
-                Err(SendError::HandlerError(Error::Internal)) => ProtoVaultState::Error,
-                Err(err) => {
-                    warn!(error = ?err, "Failed to query vault state");
-                    ProtoVaultState::Error
-                }
-            };
-            Ok(ClientResponsePayload::Vault(proto_vault::Response {
-                payload: Some(VaultResponsePayload::State(state.into())),
-            }))
-        }
-    }
-}

server/crates/arbiter-server/src/grpc/common.rs

@@ -1,2 +0,0 @@
-pub mod inbound;
-pub mod outbound;

server/crates/arbiter-server/src/grpc/common/inbound.rs

@@ -1,35 +0,0 @@
-use alloy::{consensus::TxEip1559, primitives::Address, rlp::Decodable as _};
-
-use crate::grpc::TryConvert;
-
-pub struct RawEvmAddress(pub Vec<u8>);
-impl TryConvert for RawEvmAddress {
-    type Output = Address;
-
-    type Error = tonic::Status;
-
-    fn try_convert(self) -> Result<Self::Output, Self::Error> {
-        let wallet_address = match <[u8; 20]>::try_from(self.0.as_slice()) {
-            Ok(address) => Address::from(address),
-            Err(_) => {
-                return Err(tonic::Status::invalid_argument(
-                    "Invalid EVM wallet address",
-                ));
-            }
-        };
-        Ok(wallet_address)
-    }
-}
-
-pub struct RawEvmTransaction(pub Vec<u8>);
-impl TryConvert for RawEvmTransaction {
-    type Output = TxEip1559;
-
-    type Error = tonic::Status;
-
-    fn try_convert(self) -> Result<Self::Output, Self::Error> {
-        let tx = TxEip1559::decode(&mut self.0.as_slice())
-            .map_err(|_| tonic::Status::invalid_argument("Invalid EVM transaction format"))?;
-        Ok(tx)
-    }
-}

server/crates/arbiter-server/src/grpc/common/outbound.rs

@@ -1,125 +0,0 @@
-use alloy::primitives::U256;
-use arbiter_proto::proto::{
-    evm::{
-        EvmError as ProtoEvmError,
-        evm_sign_transaction_response::Result as EvmSignTransactionResult,
-    },
-    shared::evm::{
-        EvalViolation as ProtoEvalViolation, GasLimitExceededViolation, NoMatchingGrantError,
-        PolicyViolationsError, SpecificMeaning as ProtoSpecificMeaning,
-        TokenInfo as ProtoTokenInfo, TransactionEvalError as ProtoTransactionEvalError,
-        eval_violation as proto_eval_violation, eval_violation::Kind as ProtoEvalViolationKind,
-        specific_meaning::Meaning as ProtoSpecificMeaningKind,
-        transaction_eval_error::Kind as ProtoTransactionEvalErrorKind,
-    },
-};
-
-use crate::{
-    evm::{
-        PolicyError, VetError,
-        policies::{EvalViolation, SpecificMeaning},
-    },
-    grpc::Convert,
-};
-
-fn u256_to_proto_bytes(value: U256) -> Vec<u8> {
-    value.to_be_bytes::<32>().to_vec()
-}
-
-impl Convert for SpecificMeaning {
-    type Output = ProtoSpecificMeaning;
-
-    fn convert(self) -> Self::Output {
-        let kind = match self {
-            SpecificMeaning::EtherTransfer(meaning) => ProtoSpecificMeaningKind::EtherTransfer(
-                arbiter_proto::proto::shared::evm::EtherTransferMeaning {
-                    to: meaning.to.to_vec(),
-                    value: u256_to_proto_bytes(meaning.value),
-                },
-            ),
-            SpecificMeaning::TokenTransfer(meaning) => ProtoSpecificMeaningKind::TokenTransfer(
-                arbiter_proto::proto::shared::evm::TokenTransferMeaning {
-                    token: Some(ProtoTokenInfo {
-                        symbol: meaning.token.symbol.to_string(),
-                        address: meaning.token.contract.to_vec(),
-                        chain_id: meaning.token.chain,
-                    }),
-                    to: meaning.to.to_vec(),
-                    value: u256_to_proto_bytes(meaning.value),
-                },
-            ),
-        };
-
-        ProtoSpecificMeaning {
-            meaning: Some(kind),
-        }
-    }
-}
-
-impl Convert for EvalViolation {
-    type Output = ProtoEvalViolation;
-
-    fn convert(self) -> Self::Output {
-        let kind = match self {
-            EvalViolation::InvalidTarget { target } => {
-                ProtoEvalViolationKind::InvalidTarget(target.to_vec())
-            }
-            EvalViolation::GasLimitExceeded {
-                max_gas_fee_per_gas,
-                max_priority_fee_per_gas,
-            } => ProtoEvalViolationKind::GasLimitExceeded(GasLimitExceededViolation {
-                max_gas_fee_per_gas: max_gas_fee_per_gas.map(u256_to_proto_bytes),
-                max_priority_fee_per_gas: max_priority_fee_per_gas.map(u256_to_proto_bytes),
-            }),
-            EvalViolation::RateLimitExceeded => ProtoEvalViolationKind::RateLimitExceeded(()),
-            EvalViolation::VolumetricLimitExceeded => {
-                ProtoEvalViolationKind::VolumetricLimitExceeded(())
-            }
-            EvalViolation::InvalidTime => ProtoEvalViolationKind::InvalidTime(()),
-            EvalViolation::InvalidTransactionType => {
-                ProtoEvalViolationKind::InvalidTransactionType(())
-            }
-            EvalViolation::MismatchingChainId { expected, actual } => {
-                ProtoEvalViolationKind::ChainIdMismatch(proto_eval_violation::ChainIdMismatch {
-                    expected,
-                    actual,
-                })
-            }
-        };
-
-        ProtoEvalViolation { kind: Some(kind) }
-    }
-}
-
-impl Convert for VetError {
-    type Output = EvmSignTransactionResult;
-
-    fn convert(self) -> Self::Output {
-        let kind = match self {
-            VetError::ContractCreationNotSupported => {
-                ProtoTransactionEvalErrorKind::ContractCreationNotSupported(())
-            }
-            VetError::UnsupportedTransactionType => {
-                ProtoTransactionEvalErrorKind::UnsupportedTransactionType(())
-            }
-            VetError::Evaluated(meaning, policy_error) => match policy_error {
-                PolicyError::NoMatchingGrant => {
-                    ProtoTransactionEvalErrorKind::NoMatchingGrant(NoMatchingGrantError {
-                        meaning: Some(meaning.convert()),
-                    })
-                }
-                PolicyError::Violations(violations) => {
-                    ProtoTransactionEvalErrorKind::PolicyViolations(PolicyViolationsError {
-                        meaning: Some(meaning.convert()),
-                        violations: violations.into_iter().map(Convert::convert).collect(),
-                    })
-                }
-                PolicyError::Database(_) | PolicyError::Integrity(_) => {
-                    return EvmSignTransactionResult::Error(ProtoEvmError::Internal.into());
-                }
-            },
-        };
-
-        EvmSignTransactionResult::EvalError(ProtoTransactionEvalError { kind: Some(kind) })
-    }
-}

server/crates/arbiter-server/src/grpc/mod.rs

@@ -14,26 +14,10 @@ use crate::{
     grpc::user_agent::start,
 };
 
-mod request_tracker;
-
 pub mod client;
+mod request_tracker;
 pub mod user_agent;
 
-mod common;
-
-pub trait Convert {
-    type Output;
-
-    fn convert(self) -> Self::Output;
-}
-
-pub trait TryConvert {
-    type Output;
-    type Error;
-
-    fn try_convert(self) -> Result<Self::Output, Self::Error>;
-}
-
 #[async_trait]
 impl arbiter_proto::proto::arbiter_service_server::ArbiterService for super::Server {
     type UserAgentStream = ReceiverStream<Result<UserAgentResponse, Status>>;