feat(grpc): governance contract

Reviewed-on: #90

AGENTS.md

@@ -1,16 +1,13 @@
 # AGENTS.md
 
-Guidance for coding agents (Claude Code, Codex, …) working in this repository.
+This file provides guidance to Codex (Codex.ai/code) when working with code in this repository.
 
 ## Project Overview
 
-Arbiter is a **permissioned signing service** for cryptocurrency wallets:
-
+Arbiter is a **permissioned signing service** for cryptocurrency wallets. It consists of:
 - **`server/`** — Rust gRPC daemon that holds encrypted keys and enforces policies
-- **`useragent/`** — Flutter app (desktop + mobile + web targets) with a Rust core via `flutter_rust_bridge`
-- **`protobufs/`** — Protocol Buffer definitions shared between server and clients
-- **`docs/`** — `ARCHITECTURE.md` (peer types, flows, threat model) and `IMPLEMENTATION.md`; treat them as the design source of truth and update them when behaviour changes
-- **`scripts/`** — helper scripts, e.g. `gen_erc20_registry.py`
+- **`operator/`** — Flutter desktop app (macOS/Windows) with a Rust backend via Rinf
+- **`protobufs/`** — Protocol Buffer definitions shared between server and client
 
 The vault never exposes key material; it only produces signatures when requests satisfy configured policies.
 
@@ -21,7 +18,7 @@ Tools are managed via [mise](https://mise.jdx.dev/). Install all required tools:
 mise install
 ```
 
-Key versions live in `mise.toml` (currently Rust 1.95.0 with clippy, Flutter 3.41.7-stable, protoc 29.6, diesel_cli 2.3.7 with `sqlite-bundled`, Python 3.14). Also provided there: `cargo-nextest`, `cargo-audit`, `cargo-vet`, `cargo-shear`, `cargo-mutants`, `cargo-features-manager`, `cargo-edit`, `ast-grep`, `flutter_rust_bridge_codegen`.
+Key versions: Rust 1.93.0 (with clippy), Flutter 3.38.9-stable, protoc 29.6, diesel_cli 2.3.6 (sqlite).
 
 ## Server (Rust workspace at `server/`)
 
@@ -29,14 +26,10 @@ Key versions live in `mise.toml` (currently Rust 1.95.0 with clippy, Flutter 3.4
 
 | Crate | Purpose |
 |---|---|
-| `arbiter-proto` | Generated gRPC stubs + protobuf types (`tonic-prost-build`); also `ArbiterUrl`, `home_path()`, `BOOTSTRAP_PATH` |
-| `arbiter-crypto` | Shared crypto primitives: `authn` (ML-DSA), `safecell` (hardened memory), `hashing::Hashable`, re-exported `x-wing` |
-| `arbiter-macros` | `#[derive(Hashable)]` — canonical hashing of structs for the DB integrity layer |
-| `arbiter-server` | Main daemon — actors, peers, DB, EVM policy engine, gRPC service implementation |
-| `arbiter-client` | Rust client library for SDK clients (`ArbiterClient`, EVM wallet, key storage) |
-| `arbiter-tokens-registry` | Generated ERC-20 token registry used by token-transfer policies |
-
-Workspace lints (`server/Cargo.toml`) are strict: most of clippy `pedantic`/`nursery` plus a large restriction set. `as` casts, indexing/slicing, `dbg!`, float arithmetic and undocumented `unsafe` are denied or warned — expect to add an `#[expect(..., reason = "...")]` rather than to silence a lint globally.
+| `arbiter-proto` | Generated gRPC stubs + protobuf types; compiled from `protobufs/*.proto` via `tonic-prost-build` |
+| `arbiter-server` | Main daemon — actors, DB, EVM policy engine, gRPC service implementation |
+| `arbiter-operator` | Rust client library for the operator side of the gRPC protocol |
+| `arbiter-client` | Rust client library for SDK clients |
 
 ### Common Commands
 
@@ -49,78 +42,54 @@ cargo build
 # Run the server daemon
 cargo run -p arbiter-server
 
-# Run all tests (preferred over cargo test; CI uses --all-features)
+# Run all tests (preferred over cargo test)
 cargo nextest run
 
 # Run a single test
 cargo nextest run <test_name>
 
-# Lint (CI runs it with -D warnings)
-cargo clippy --all -- -D warnings
+# Lint
+cargo clippy
 
 # Security audit
 cargo audit
 
-# Supply-chain review (config in server/supply-chain/)
-cargo vet
-
 # Check unused dependencies
 cargo shear
 
-# Mutation testing
-cargo mutants
+# Run snapshot tests and update snapshots
+cargo insta review
 ```
 
-### CI
-
-Woodpecker pipelines in `.woodpecker/` run on `server/**` changes: `server-lint` (clippy), `server-test` (nextest, `--all-features`), `server-audit`, `server-vet`, plus `useragent-analyze` for the Flutter app.
-
 ### Architecture
 
-The server is actor-based using the **kameo** crate. Long-lived state lives in `GlobalActors` (`src/actors/mod.rs`):
+The server is actor-based using the **kameo** crate. All long-lived state lives in `GlobalActors`:
 
-- **`Bootstrapper`** — one-time bootstrap token, written to `~/.arbiter/bootstrap_token` on first run
-- **`Vault`** — encrypted root key and the Sealed/Unsealed state machine; on unseal decrypts the root key into a `memsafe`-backed `SafeCell`
-- **`FlowCoordinator`** — cross-connection flow between operators and SDK clients
-- **`OperatorRegistry`** — tracks currently connected operators
-- **`EvmActor`** — EVM transaction policy enforcement and signing
-- **`events`** — a `kameo_actors::MessageBus` (`DeliveryStrategy::Guaranteed`) for cross-actor notifications
+- **`Bootstrapper`** — Manages the one-time bootstrap token written to `~/.arbiter/bootstrap_token` on first run.
+- **`Vault`** — 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 operators and SDK clients.
+- **`EvmActor`** — Handles EVM transaction policy enforcement and signing.
 
-Per-connection state lives under **`src/peers/`**, not `actors/`: `peers/client/` and `peers/operator/`, each with `auth` (challenge-response) and `session` (post-auth) sub-modules; the operator side additionally has `vault_gate/` for the unseal handshake.
+Per-connection actors live under `actors/operator/` and `actors/client/`, each with `auth` (challenge-response authentication) and `session` (post-auth operations) sub-modules.
 
-The gRPC surface lives in **`src/grpc/`**, split per peer (`client/`, `operator/`, `common/`) and per direction (`inbound.rs` — requests to the daemon, `outbound.rs` — server-initiated streams), with `request_tracker.rs` correlating the two.
-
-EVM logic is in `src/evm/`: `policies/ether_transfer/`, `policies/token_transfers/`, `abi.rs`, `safe_signer.rs`.
-
-**Database:** SQLite via `diesel-async` + `bb8`. Schema in `src/db/schema.rs`, models in `src/db/models.rs`, embedded migrations in `crates/arbiter-server/migrations/`. DB file lives at `~/.arbiter/arbiter.sqlite`; tests use a temp-file DB via `db::create_test_pool()`.
-
-Entity ids are newtypes generated by the `declare_id!` macro in `db::models` (`OperatorId`, `ChainId`, …), each a `#[repr(transparent)]` wrapper over `i32` with `to_raw`/`from_raw`. Pass these around instead of bare `i32`.
-
-**Row integrity:** sensitive rows are covered by an HMAC-SHA256 envelope (`src/crypto/integrity/`, table `integrity_envelope`), keyed from the vault root key. A struct becomes coverable by deriving `arbiter_macros::Hashable` and implementing `Integrable` (`KIND` + `VERSION`). When adding or changing a covered entity, keep the derive and the payload version in sync — a mismatch surfaces as `PayloadVersionMismatch` or `MacMismatch` at runtime.
+**Database:** SQLite via `diesel-async` + `bb8` connection pool. Schema managed by embedded Diesel migrations in `crates/arbiter-server/migrations/`. DB file lives at `~/.arbiter/arbiter.sqlite`. Tests use a temp-file DB via `db::create_test_pool()`.
 
 **Cryptography:**
-- Authentication: **ML-DSA-87** (post-quantum, `arbiter-crypto::authn::v1`), challenge-response with per-peer nonce tracking
-- Encryption at rest: XChaCha20-Poly1305, versioned modules (`crypto/encryption/v1.rs`) with a `schema_version` column for transparent migration on unseal
+- Authentication: ed25519 (challenge-response, nonce-tracked per peer)
+- Encryption at rest: XChaCha20-Poly1305 (versioned via `scheme` field for transparent migration on unseal)
 - Password KDF: Argon2
-- Unseal transport: X25519 ephemeral key exchange (`peers/operator/vault_gate/`); `x-wing` (hybrid PQ KEM) is available via `arbiter-crypto`
-- TLS: self-signed certificate (rustls + aws-lc-rs, `prefer-post-quantum`), fingerprint distributed via `ArbiterUrl`
+- Unseal transport: X25519 ephemeral key exchange
+- TLS: self-signed certificate (aws-lc-rs backend), fingerprint distributed via `ArbiterUrl`
 
-Crypto modules are versioned by convention: `mod.rs` re-exports the current `vN`. Add a `v(N+1)` rather than editing an existing version in place.
-
-**Protocol:** gRPC with Protocol Buffers. `ArbiterUrl` encodes host, port, CA cert and bootstrap token into a single shareable string (printed to console on first run).
+**Protocol:** gRPC with Protocol Buffers. The `ArbiterUrl` type encodes host, port, CA cert, and bootstrap token into a single shareable string (printed to console on first run).
 
 ### Proto Regeneration
 
-`arbiter-proto/build.rs` compiles `arbiter.proto`, `operator.proto`, `client.proto` and `evm.proto` (with their `shared/`, `operator/`, `client/` includes) on build:
+When `.proto` files in `protobufs/` change, rebuild to regenerate:
 ```sh
 cd server && cargo build -p arbiter-proto
 ```
 
-Dart protobuf stubs are generated separately, from the repo root:
-```sh
-mise run codegen   # protoc --dart_out=grpc:useragent/lib/proto
-```
-
 ### Database Migrations
 
 ```sh
@@ -131,8 +100,6 @@ diesel migration generate <name> --migration-dir crates/arbiter-server/migration
 diesel migration run --migration-dir crates/arbiter-server/migrations
 ```
 
-Pre-release policy: there is a single `init` migration and no deployed databases yet, so schema changes are made by editing that migration directly instead of stacking new ones. Regenerate `src/db/schema.rs` after changing it.
-
 ### Code Conventions
 
 **`#[must_use]` Attribute:**
@@ -154,23 +121,29 @@ pub fn verify(&self, nonce: i32, context: &[u8], signature: &Signature) -> bool
 
 This forces callers to either use the return value or explicitly ignore it with `let _ = ...;`, preventing silent failures.
 
-## User Agent (Flutter + flutter_rust_bridge at `useragent/`)
+## Operator (Flutter + Rinf at `operator/`)
 
-The Flutter app calls Rust through [flutter_rust_bridge](https://cjycode.com/flutter_rust_bridge/) 2.12.0. The Rust side is the `rust_lib_arbiter` crate at `useragent/rust/`; everything exposed to Dart is declared in `useragent/rust/src/api/` and lands in `useragent/lib/src/rust/` (see `useragent/flutter_rust_bridge.yaml`). Dart UI code is organised as `lib/features/`, `lib/screens/`, `lib/widgets/`, `lib/providers/`, `lib/theme/`, with routing in `lib/router.dart` (`router.gr.dart` is generated).
+The Flutter app uses [Rinf](https://rinf.cunarist.org) to call Rust code. The Rust logic lives in `operator/native/hub/` as a separate crate that uses `arbiter-operator` for the gRPC client.
+
+Communication between Dart and Rust uses typed **signals** defined in `operator/native/hub/src/signals/`. After modifying signal structs, regenerate Dart bindings:
+
+```sh
+cd operator && rinf gen
+```
 
 ### Common Commands
 
 ```sh
-cd useragent
+cd operator
 
-# Run the app
+# Run the app (macOS or Windows)
 flutter run
 
-# Regenerate Rust↔Dart bindings after editing rust/src/api/
-mise run codegen        # flutter_rust_bridge_codegen generate
+# Regenerate Rust↔Dart signal bindings
+rinf gen
 
-# Analyze Dart code (also run in CI)
+# Analyze Dart code
 flutter analyze
 ```
 
-Note: `app/` contains only stale generated Flutter artifacts and is not the application source.
+The Rinf Rust entry point is `operator/native/hub/src/lib.rs`. It spawns actors defined in `operator/native/hub/src/actors/` which handle Dart↔server communication via signals.

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

@@ -0,0 +1,821 @@
+# 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 |
+|---|---|---|
+| `operator/lib/theme/palette.dart` | Modify | Add `Palette.token` (indigo accent for token-transfer cards) |
+| `operator/lib/features/connection/evm/wallet_access.dart` | Modify | Add `listAllWalletAccesses()` function |
+| `operator/lib/providers/sdk_clients/wallet_access_list.dart` | Create | `WalletAccessListProvider` — fetches full wallet access list with IDs |
+| `operator/lib/screens/dashboard/evm/grants/widgets/grant_card.dart` | Create | `GrantCard` widget — watches enrichment providers + revoke mutation; one card per grant |
+| `operator/lib/screens/dashboard/evm/grants/grants.dart` | Create | `EvmGrantsScreen` — watches `evmGrantsProvider`; handles loading/error/empty/data states; renders `GrantCard` list |
+| `operator/lib/router.dart` | Modify | Register `EvmGrantsRoute` in dashboard children |
+| `operator/lib/screens/dashboard.dart` | Modify | Add Grants entry to `routes` list and `NavigationDestination` list |
+
+---
+
+## Task 1: Add `Palette.token`
+
+**Files:**
+- Modify: `operator/lib/theme/palette.dart`
+
+- [ ] **Step 1: Add the color**
+
+Replace the contents of `operator/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 operator && 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: `operator/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 `operator/lib/features/connection/evm/wallet_access.dart`:
+
+```dart
+Future<List<SdkClientWalletAccess>> listAllWalletAccesses(
+  Connection connection,
+) async {
+  final response = await connection.ask(
+    OperatorRequest(listWalletAccess: Empty()),
+  );
+  if (!response.hasListWalletAccessResponse()) {
+    throw Exception(
+      'Expected list wallet access response, got ${response.whichPayload()}',
+    );
+  }
+  return response.listWalletAccessResponse.accesses.toList(growable: false);
+}
+```
+
+Each returned `SdkClientWalletAccess` has:
+- `.id` — the `evm_wallet_access` row ID (same value as `wallet_access_id` in a `GrantEntry`)
+- `.access.walletId` — the EVM wallet DB ID
+- `.access.sdkClientId` — the SDK client DB ID
+
+- [ ] **Step 2: Verify**
+
+```sh
+cd operator && flutter analyze lib/features/connection/evm/wallet_access.dart
+```
+
+Expected: no issues.
+
+- [ ] **Step 3: Commit**
+
+```sh
+jj describe -m "feat(evm): add listAllWalletAccesses feature function"
+jj new
+```
+
+---
+
+## Task 3: Create `WalletAccessListProvider`
+
+**Files:**
+- Create: `operator/lib/providers/sdk_clients/wallet_access_list.dart`
+- Generated: `operator/lib/providers/sdk_clients/wallet_access_list.g.dart`
+
+Mirrors the structure of `EvmGrants` in `providers/evm/evm_grants.dart` — class-based `@riverpod` with a `refresh()` method.
+
+- [ ] **Step 1: Write the provider**
+
+Create `operator/lib/providers/sdk_clients/wallet_access_list.dart`:
+
+```dart
+import 'package:arbiter/features/connection/evm/wallet_access.dart';
+import 'package:arbiter/proto/operator.pb.dart';
+import 'package:arbiter/providers/connection/connection_manager.dart';
+import 'package:mtcore/markettakers.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'wallet_access_list.g.dart';
+
+@riverpod
+class WalletAccessList extends _$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 operator && dart run build_runner build --delete-conflicting-outputs
+```
+
+Expected: `operator/lib/providers/sdk_clients/wallet_access_list.g.dart` created. No errors.
+
+- [ ] **Step 3: Verify**
+
+```sh
+cd operator && 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: `operator/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/operator.pb.dart`): `.id`, `.access.walletId`, `.access.sdkClientId`
+- `WalletEntry` (from `proto/evm.pb.dart`): `.id`, `.address` (List<int>)
+- `SdkClientEntry` (from `proto/operator.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 `operator/lib/screens/dashboard/evm/grants/widgets/grant_card.dart`:
+
+```dart
+import 'package:arbiter/proto/evm.pb.dart';
+import 'package:arbiter/proto/operator.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 operator && 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: `operator/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 `operator/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 operator && 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: `operator/lib/router.dart`
+- Modify: `operator/lib/screens/dashboard.dart`
+- Regenerated: `operator/lib/router.gr.dart`
+
+- [ ] **Step 1: Add route to `router.dart`**
+
+Replace the contents of `operator/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 `operator/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 operator && 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 operator && 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

@@ -0,0 +1,170 @@
+# Grant Grid View — Design Spec
+
+**Date:** 2026-03-28
+
+## Overview
+
+Add a "Grants" dashboard tab to the Flutter operator 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:** `operator/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:** `operator/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

@@ -152,8 +152,5 @@ url = "https://github.com/astral-sh/python-build-standalone/releases/download/20
 provenance = "github-attestations"
 
 [[tools.rust]]
-version = "1.98.1"
+version = "1.95.0"
 backend = "core:rust"
-
-[tools.rust.options]
-components = "clippy,rust-analyzer"

mise.toml

@@ -4,7 +4,7 @@
 "cargo:cargo-vet" = "0.10.2"
 flutter = "3.41.7-stable"
 protoc = "29.6"
-rust = { version = "latest", components = "clippy,rust-analyzer" }
+rust = { version = "1.95.0", components = "clippy,rust-analyzer" }
 "cargo:cargo-features-manager" = "0.12.0"
 "cargo:cargo-nextest" = "0.9.133"
 "cargo:cargo-shear" = "latest"

server/Cargo.lock

@@ -504,7 +504,7 @@ dependencies = [
  "async-trait",
  "auto_impl",
  "either",
- "elliptic-curve 0.13.8",
+ "elliptic-curve",
  "k256",
  "thiserror",
 ]
@@ -771,7 +771,6 @@ dependencies = [
  "proptest",
  "prost-types",
  "rand 0.10.1",
- "rand_core 0.10.1",
  "rcgen",
  "restructed",
  "rstest",
@@ -822,7 +821,7 @@ dependencies = [
  "ark-serialize 0.3.0",
  "ark-std 0.3.0",
  "derivative",
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-traits",
  "paste",
  "rustc_version 0.3.3",
@@ -842,7 +841,7 @@ dependencies = [
  "derivative",
  "digest 0.10.7",
  "itertools 0.10.5",
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-traits",
  "paste",
  "rustc_version 0.4.1",
@@ -863,7 +862,7 @@ dependencies = [
  "digest 0.10.7",
  "educe",
  "itertools 0.13.0",
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-traits",
  "paste",
  "zeroize",
@@ -905,7 +904,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "db2fd794a08ccb318058009eefdf15bcaaaaf6f8161eb3345f907222bac38b20"
 dependencies = [
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-traits",
  "quote",
  "syn 1.0.109",
@@ -917,7 +916,7 @@ version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7abe79b0e4288889c4574159ab790824d0033b9fdcb2a112a3182fac2e514565"
 dependencies = [
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-traits",
  "proc-macro2",
  "quote",
@@ -930,7 +929,7 @@ version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09be120733ee33f7693ceaa202ca41accd5653b779563608f1234f78ae07c4b3"
 dependencies = [
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-traits",
  "proc-macro2",
  "quote",
@@ -955,7 +954,7 @@ checksum = "adb7b85a02b83d2f22f89bd5cac66c9c89474240cb6207cb1efc16d098e822a5"
 dependencies = [
  "ark-std 0.4.0",
  "digest 0.10.7",
- "num-bigint 0.4.6",
+ "num-bigint",
 ]
 
 [[package]]
@@ -967,7 +966,7 @@ dependencies = [
  "ark-std 0.5.0",
  "arrayvec",
  "digest 0.10.7",
- "num-bigint 0.4.6",
+ "num-bigint",
 ]
 
 [[package]]
@@ -1197,12 +1196,6 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4c7f02d4ea65f2c1853089ffd8d2787bdbc63de2f0d29dedbcf8ccdfa0ccd4cf"
 
-[[package]]
-name = "base16ct"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fd307490d624467aa6f74b0eabb77633d1f758a7b25f12bceb0b22e08d9726f6"
-
 [[package]]
 name = "base64"
 version = "0.22.1"
@@ -1560,12 +1553,6 @@ version = "0.8.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "773648b94d0e5d620f64f280777445740e61fe701025087ec8b57f45c791888b"
 
-[[package]]
-name = "cpubits"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15b85f9c39137c3a891689859392b1bd49812121d0d61c9caf00d46ed5ce06ae"
-
 [[package]]
 name = "cpufeatures"
 version = "0.2.17"
@@ -1628,22 +1615,20 @@ checksum = "0dc92fb57ca44df6db8059111ab3af99a63d5d0f8375d9972e319a379c6bab76"
 dependencies = [
  "generic-array 0.14.7",
  "rand_core 0.6.4",
+ "serdect 0.2.0",
  "subtle",
  "zeroize",
 ]
 
 [[package]]
 name = "crypto-bigint"
-version = "0.7.5"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a52aa3fcda4e6302a9f48734f234d35d4721b96f8fe07d073f07ce9df4f0271"
+checksum = "96272c2ff28b807e09250b180ad1fb7889a3258f7455759b5c3c58b719467130"
 dependencies = [
- "cpubits",
- "ctutils",
- "hybrid-array",
  "num-traits",
- "rand_core 0.10.1",
- "serdect 0.4.3",
+ "rand_core 0.6.4",
+ "serdect 0.3.0",
  "subtle",
  "zeroize",
 ]
@@ -1676,7 +1661,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d5515a3834141de9eafb9717ad39eea8247b5674e6066c404e8c4b365d2a29e"
 dependencies = [
  "cmov",
- "subtle",
 ]
 
 [[package]]
@@ -1839,7 +1823,7 @@ dependencies = [
  "asn1-rs",
  "displaydoc",
  "nom",
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-traits",
  "rusticata-macros",
 ]
@@ -2036,7 +2020,7 @@ checksum = "ee27f32b5c5292967d2d4a9d7f1e0b0aed2c15daded5a60300e4abb9d8020bca"
 dependencies = [
  "der 0.7.10",
  "digest 0.10.7",
- "elliptic-curve 0.13.8",
+ "elliptic-curve",
  "rfc6979",
  "serdect 0.2.0",
  "signature 2.2.0",
@@ -2070,50 +2054,34 @@ version = "0.13.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5e6043086bf7973472e0c7dff2142ea0b680d30e18d9cc40f267efbf222bd47"
 dependencies = [
- "base16ct 0.2.0",
+ "base16ct",
  "crypto-bigint 0.5.5",
  "digest 0.10.7",
- "ff 0.13.1",
+ "ff",
  "generic-array 0.14.7",
- "group 0.13.0",
+ "group",
+ "hkdf",
  "pkcs8 0.10.2",
  "rand_core 0.6.4",
- "sec1 0.7.3",
+ "sec1",
  "serdect 0.2.0",
  "subtle",
- "zeroize",
-]
-
-[[package]]
-name = "elliptic-curve"
-version = "0.14.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d65aa39b3a5c1c9c1b745c9a019234bb7a21b77abcb4f4d266d706e2d577d65"
-dependencies = [
- "base16ct 1.0.0",
- "crypto-bigint 0.7.5",
- "crypto-common 0.2.1",
- "ff 0.14.0",
- "group 0.14.0",
- "hybrid-array",
- "pkcs8 0.11.0",
- "rand_core 0.10.1",
- "sec1 0.8.1",
- "serdect 0.4.3",
- "subtle",
+ "tap",
  "zeroize",
 ]
 
 [[package]]
 name = "elliptic-curve-tools"
-version = "0.3.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a0d5e534f103b079a71ef1d66c6e62c89413f1b62709ca11f744429b4afe5b4"
+checksum = "1de2b6fae800f08032a6ea32995b52925b1d451bff9d445c8ab2932323277faf"
 dependencies = [
- "elliptic-curve 0.14.1",
+ "elliptic-curve",
  "heapless",
+ "hex",
+ "multiexp",
  "serde",
- "serdect 0.4.3",
+ "zeroize",
 ]
 
 [[package]]
@@ -2186,20 +2154,11 @@ version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c0b50bfb653653f9ca9095b427bed08ab8d75a137839d9ad64eb11810d5b6393"
 dependencies = [
+ "bitvec",
  "rand_core 0.6.4",
  "subtle",
 ]
 
-[[package]]
-name = "ff"
-version = "0.14.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1f686ab92a9fb0eaf188f6c6c87b89490baa6fdb0db4544ba4dc47f7942489f"
-dependencies = [
- "rand_core 0.10.1",
- "subtle",
-]
-
 [[package]]
 name = "fiat-crypto"
 version = "0.2.9"
@@ -2398,9 +2357,9 @@ dependencies = [
 
 [[package]]
 name = "generic-array"
-version = "1.4.2"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb130435a959a8d525e6bca66ff6c40981a300ee96d70e3ef56f046556d614a3"
+checksum = "dab9e9188e97a93276e1fe7b56401b851e2b45a46d045ca658100c1303ada649"
 dependencies = [
  "rustversion",
  "serde_core",
@@ -2466,22 +2425,11 @@ version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f0f9ef7462f7c099f518d754361858f86d8a07af53ba9af0fe635bbccb151a63"
 dependencies = [
- "ff 0.13.1",
+ "ff",
  "rand_core 0.6.4",
  "subtle",
 ]
 
-[[package]]
-name = "group"
-version = "0.14.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fd1a1c7a5206c5b7a3f5a0d7ccd3ff85d0c8f5133d62a02680255b0004af5f4"
-dependencies = [
- "ff 0.14.0",
- "rand_core 0.10.1",
- "subtle",
-]
-
 [[package]]
 name = "h2"
 version = "0.4.13"
@@ -2552,9 +2500,9 @@ checksum = "4f467dd6dccf739c208452f8014c75c18bb8301b050ad1cfb27153803edb0f51"
 
 [[package]]
 name = "heapless"
-version = "0.9.3"
+version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25ba4bd83f9415b58b4ed8dc5714c76e626a105be4646c02630ad730ad3b5aa4"
+checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
 dependencies = [
  "hash32",
  "stable_deref_trait",
@@ -2587,6 +2535,15 @@ dependencies = [
  "arrayvec",
 ]
 
+[[package]]
+name = "hkdf"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b5f8eb2ad728638ea2c7d47a21db23b7b58a72ed6a38256b8a1849f15fbbdf7"
+dependencies = [
+ "hmac 0.12.1",
+]
+
 [[package]]
 name = "hmac"
 version = "0.12.1"
@@ -2652,13 +2609,12 @@ checksum = "df3b46402a9d5adb4c86a0cf463f42e19994e3ee891101b1841f30a545cb49a9"
 
 [[package]]
 name = "hybrid-array"
-version = "0.4.15"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "27f864f10dfb56725ce5ce5472bc52252c8f93a4ab86327122cebf62c5f59a17"
+checksum = "08d46837a0ed51fe95bd3b05de33cd64a1ee88fc797477ca48446872504507c5"
 dependencies = [
  "ctutils",
  "serde",
- "subtle",
  "typenum",
  "zeroize",
 ]
@@ -3061,7 +3017,7 @@ checksum = "f6e3919bbaa2945715f0bb6d3934a173d1e9a59ac23767fbaaef277265a7411b"
 dependencies = [
  "cfg-if",
  "ecdsa",
- "elliptic-curve 0.13.8",
+ "elliptic-curve",
  "once_cell",
  "serdect 0.2.0",
  "sha2 0.10.9",
@@ -3070,8 +3026,8 @@ dependencies = [
 
 [[package]]
 name = "kameo"
-version = "0.22.2"
-source = "git+https://github.com/hdbg/kameo.git?rev=3bbebac#3bbebac9f2a943be75588d80826e6bea45079d5f"
+version = "0.20.0"
+source = "git+https://github.com/hdbg/kameo.git?rev=805b417#805b41783fe90b54827ecad142b422c7a9b69b9a"
 dependencies = [
  "downcast-rs",
  "dyn-clone",
@@ -3084,8 +3040,8 @@ dependencies = [
 
 [[package]]
 name = "kameo_actors"
-version = "0.8.1"
-source = "git+https://github.com/hdbg/kameo.git?rev=3bbebac#3bbebac9f2a943be75588d80826e6bea45079d5f"
+version = "0.5.0"
+source = "git+https://github.com/hdbg/kameo.git?rev=805b417#805b41783fe90b54827ecad142b422c7a9b69b9a"
 dependencies = [
  "futures",
  "glob",
@@ -3096,13 +3052,14 @@ dependencies = [
 
 [[package]]
 name = "kameo_macros"
-version = "0.21.1"
-source = "git+https://github.com/hdbg/kameo.git?rev=3bbebac#3bbebac9f2a943be75588d80826e6bea45079d5f"
+version = "0.20.0"
+source = "git+https://github.com/hdbg/kameo.git?rev=805b417#805b41783fe90b54827ecad142b422c7a9b69b9a"
 dependencies = [
+ "darling 0.23.0",
  "heck",
  "proc-macro2",
  "quote",
- "syn 3.0.5",
+ "syn 2.0.117",
 ]
 
 [[package]]
@@ -3405,6 +3362,20 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "multiexp"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ec2ce93a6f06ac6cae04c1da3f2a6a24fcfc1f0eb0b4e0f3d302f0df45326cb"
+dependencies = [
+ "ff",
+ "group",
+ "rand_core 0.6.4",
+ "rustversion",
+ "std-shims",
+ "zeroize",
+]
+
 [[package]]
 name = "multimap"
 version = "0.10.1"
@@ -3436,6 +3407,20 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "num"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35bd024e8b2ff75562e5f34e7f4905839deb4b22955ef5e73d2fea1b9813cb23"
+dependencies = [
+ "num-bigint",
+ "num-complex",
+ "num-integer",
+ "num-iter",
+ "num-rational",
+ "num-traits",
+]
+
 [[package]]
 name = "num-bigint"
 version = "0.4.6"
@@ -3444,16 +3429,18 @@ checksum = "a5e44f723f1133c9deac646763579fdb3ac745e418f2a7af9cd0c431da1f20b9"
 dependencies = [
  "num-integer",
  "num-traits",
+ "rand 0.8.6",
+ "serde",
 ]
 
 [[package]]
-name = "num-bigint"
-version = "0.5.1"
+name = "num-complex"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93e7820bc0a80a0238e650327316f929ba18d5be054b647490a3a6a339f3e7c0"
+checksum = "73f88a1307638156682bada9d7604135552957b7818057dcef22705b4d509495"
 dependencies = [
- "num-integer",
  "num-traits",
+ "rand 0.8.6",
  "serde",
 ]
 
@@ -3472,6 +3459,29 @@ 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-rational"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f83d14da390562dca69fc84082e73e548e1ad308d24accdedd2720017cb37824"
+dependencies = [
+ "num-bigint",
+ "num-integer",
+ "num-traits",
+ "serde",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -4351,7 +4361,7 @@ dependencies = [
  "bytes",
  "fastrlp 0.3.1",
  "fastrlp 0.4.0",
- "num-bigint 0.4.6",
+ "num-bigint",
  "num-integer",
  "num-traits",
  "parity-scale-codec",
@@ -4578,7 +4588,7 @@ version = "0.7.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3e97a565f76233a6003f9f5c54be1d9c5bdfa3eccfb189469f11ec4901c47dc"
 dependencies = [
- "base16ct 0.2.0",
+ "base16ct",
  "der 0.7.10",
  "generic-array 0.14.7",
  "pkcs8 0.10.2",
@@ -4587,21 +4597,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "sec1"
-version = "0.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d56d437c2f19203ce5f7122e507831de96f3d2d4d3be5af44a0b0a09d8a80e4d"
-dependencies = [
- "base16ct 1.0.0",
- "ctutils",
- "der 0.8.0",
- "hybrid-array",
- "serdect 0.4.3",
- "subtle",
- "zeroize",
-]
-
 [[package]]
 name = "secp256k1"
 version = "0.30.0"
@@ -4759,17 +4754,17 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a84f14a19e9a014bb9f4512488d9829a68e04ecabffb0f9904cd1ace94598177"
 dependencies = [
- "base16ct 0.2.0",
+ "base16ct",
  "serde",
 ]
 
 [[package]]
 name = "serdect"
-version = "0.4.3"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66cf8fedced2fcf12406bcb34223dffb92eaf34908ede12fed414c82b7f00b3e"
+checksum = "f42f67da2385b51a5f9652db9c93d78aeaf7610bf5ec366080b6de810604af53"
 dependencies = [
- "base16ct 1.0.0",
+ "base16ct",
  "serde",
 ]
 
@@ -4815,17 +4810,6 @@ dependencies = [
  "keccak 0.2.0",
 ]
 
-[[package]]
-name = "sha3"
-version = "0.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc9bad02c26382724b2d2692c6f179285e4b54eeecd7968f52a50059c3c11759"
-dependencies = [
- "digest 0.11.2",
- "keccak 0.2.0",
- "sponge-cursor",
-]
-
 [[package]]
 name = "sha3-asm"
 version = "0.1.6"
@@ -4836,17 +4820,6 @@ dependencies = [
  "cfg-if",
 ]
 
-[[package]]
-name = "shake"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09057cb2149ad4cbd2da1e26b351f9a4c354219421229c69c3063e6f61947c4a"
-dependencies = [
- "digest 0.11.2",
- "keccak 0.2.0",
- "sponge-cursor",
-]
-
 [[package]]
 name = "sharded-slab"
 version = "0.1.7"
@@ -4960,6 +4933,12 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
+[[package]]
+name = "spin"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5fe4ccb98d9c292d56fec89a5e07da7fc4cf0dc11e156b41793132775d3e591"
+
 [[package]]
 name = "spki"
 version = "0.7.3"
@@ -4980,12 +4959,6 @@ dependencies = [
  "der 0.8.0",
 ]
 
-[[package]]
-name = "sponge-cursor"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a0219bd7d979d58245a4f41f695e1ac9f8befdffadd7f61f1bae9e39abc6620"
-
 [[package]]
 name = "sqlite-wasm-rs"
 version = "0.5.3"
@@ -5010,6 +4983,17 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
+[[package]]
+name = "std-shims"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "227c4f8561598188d0df96dbe749824576174bba278b5b6bb2eacff1066067d0"
+dependencies = [
+ "hashbrown 0.16.1",
+ "rustversion",
+ "spin",
+]
+
 [[package]]
 name = "string_morph"
 version = "0.1.0"
@@ -5113,17 +5097,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "syn"
-version = "3.0.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12df2e0110f65b775f769bb17ef989067a1d931b2eb822bd4346631eeada89f9"
-dependencies = [
- "proc-macro2",
- "quote",
- "unicode-ident",
-]
-
 [[package]]
 name = "syn-solidity"
 version = "1.5.7"
@@ -5766,23 +5739,21 @@ checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
 [[package]]
 name = "vsss-rs"
-version = "6.0.1"
+version = "5.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d6bfc736cfd88115aedb95ba84bc2d428fe351e92a56f69fce090af301402d91"
+checksum = "6ec751bdcc8bda099e269b24cc6b4ad14f9ce8b0490c1599174070e792ecd70c"
 dependencies = [
- "crypto-bigint 0.7.5",
- "elliptic-curve 0.14.1",
+ "crypto-bigint 0.5.5",
+ "crypto-bigint 0.6.1",
+ "elliptic-curve",
  "elliptic-curve-tools",
- "ff 0.14.0",
- "generic-array 1.4.2",
+ "generic-array 1.4.1",
  "hex",
  "hybrid-array",
- "num-bigint 0.5.1",
- "num-traits",
- "rand_core 0.10.1",
+ "num",
+ "rand_core 0.6.4",
  "serde",
- "sha3 0.12.0",
- "shake",
+ "sha3 0.10.9",
  "subtle",
  "zeroize",
 ]
@@ -6474,18 +6445,18 @@ dependencies = [
 
 [[package]]
 name = "zeroize"
-version = "1.9.0"
+version = "1.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e13c156562582aa81c60cb29407084cdb54c4164760106ab78e6c5b0858cf64e"
+checksum = "b97154e67e32c85465826e8bcc1c59429aaaf107c1e4a9e53c8d8ccd5eff88d0"
 dependencies = [
  "zeroize_derive",
 ]
 
 [[package]]
 name = "zeroize_derive"
-version = "1.5.0"
+version = "1.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c50655cbb0fe3fc43170059e702f1ce5e19b84cec58dc87b037a09935c2f328"
+checksum = "85a5b4158499876c763cb03bc4e49185d3cccbabb15b33c627f7884f43db852e"
 dependencies = [
  "proc-macro2",
  "quote",

server/Cargo.toml

@@ -12,8 +12,8 @@ base64 = "0.22.1"
 chrono = { version = "0.4.44", features = ["serde"] }
 futures = "0.3.32"
 k256 = { version = "0.13.4", features = ["ecdsa", "pkcs8"] }
-kameo = {git = "https://github.com/hdbg/kameo.git", rev = "3bbebac"}
-kameo_actors = {git = "https://github.com/hdbg/kameo.git", rev = "3bbebac"}
+kameo = {git = "https://github.com/hdbg/kameo.git", rev = "805b417"}
+kameo_actors = {git = "https://github.com/hdbg/kameo.git", rev = "805b417"}
 hmac = "0.13.0"
 miette = { version = "7.6.0", features = ["fancy", "serde"] }
 ml-dsa = { version = "0.1.0-rc.9", features = ["zeroize"] }
@@ -21,7 +21,6 @@ mutants = "0.0.4"
 prost = "0.14.3"
 prost-types = { version = "0.14.3", features = ["chrono"] }
 rand = "0.10.1"
-rand_core = "0.10.1"
 rcgen = { version = "0.14.7", features = [ "aws_lc_rs",  "pem", "x509-parser", "zeroize" ], default-features = false }
 rstest = "0.26.1"
 rustls = { version = "0.23.40", features = ["aws-lc-rs", "logging", "prefer-post-quantum", "std"], default-features = false }
@@ -77,8 +76,6 @@ needless_pass_by_ref_mut = "allow"
 pub_underscore_fields = "allow"
 redundant_pub_crate = "allow" 
 uninhabited_references = "allow" # safe with unsafe_code = "forbid" and standard uninhabited pattern (match *self {})
-too-many-lines = "allow" # this is a very common pattern in server code, and it's not always possible to break it down into smaller modules without hurting readability
-unused_async_trait_impl = "allow" # too pedantic
 
 # restriction lints
 alloc_instead_of_core = "warn"

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

@@ -100,7 +100,7 @@ async fn send_auth_challenge_solution(
     key: &SigningKey,
     challenge: AuthChallenge,
 ) -> Result<(), AuthError> {
-    let timestamp = DateTime::from_timestamp_nanos(challenge.timestamp_nanos.cast_signed());
+    let timestamp = DateTime::from_timestamp_nanos(challenge.timestamp_nanos as i64);
     let challenge = authn::AuthChallenge {
         nonce: *challenge
             .random

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

@@ -94,6 +94,7 @@ impl ArbiterClient {
     }
 
     #[cfg(feature = "evm")]
+    #[expect(clippy::unused_async, reason = "false positive")]
     pub async fn evm_wallets(&self) -> Result<Vec<ArbiterEvmWallet>, ArbiterClientError> {
         todo!("fetch EVM wallet list from server")
     }

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

@@ -22,7 +22,7 @@ pub trait SafeCellHandle<T> {
     fn read(&mut self) -> Self::CellRead<'_>;
     fn write(&mut self) -> Self::CellWrite<'_>;
 
-    fn new_inline<F>(f: F) -> Self
+    fn new_inline_default<F>(f: F) -> Self
     where
         Self: Sized,
         T: Default,
@@ -36,6 +36,14 @@ pub trait SafeCellHandle<T> {
         cell
     }
 
+    fn new_inline<F>(f: Box<F>) -> Self
+    where
+        Self: Sized,
+        F: for<'a> FnOnce() -> T,
+    {
+        Self::new(f())
+    }
+
     #[inline(always)]
     fn read_inline<F, R>(&mut self, f: F) -> R
     where

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

@@ -23,10 +23,6 @@ pub mod proto {
             tonic::include_proto!("arbiter.operator.evm");
         }
 
-        pub mod governance {
-            tonic::include_proto!("arbiter.operator.governance");
-        }
-
         pub mod sdk_client {
             tonic::include_proto!("arbiter.operator.sdk_client");
         }
@@ -38,10 +34,6 @@ pub mod proto {
                 tonic::include_proto!("arbiter.operator.vault.bootstrap");
             }
 
-            pub mod rekey {
-                tonic::include_proto!("arbiter.operator.vault.rekey");
-            }
-
             pub mod unseal {
                 tonic::include_proto!("arbiter.operator.vault.unseal");
             }

server/crates/arbiter-server/Cargo.toml

@@ -31,7 +31,6 @@ diesel_migrations = { version = "2.3.2", features = ["sqlite"] }
 async-trait.workspace = true
 tokio-stream.workspace = true
 rand.workspace = true
-rand_core.workspace = true
 rcgen.workspace = true
 chrono.workspace = true
 kameo.workspace = true
@@ -51,7 +50,7 @@ subtle = "2.6.1"
 x25519-dalek.workspace = true
 k256.workspace = true
 kameo_actors.workspace = true
-vsss-rs = "6.0.1"
+vsss-rs = "5.4.0"
 
 [dev-dependencies]
 proptest = "1.11.0"

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

@@ -37,8 +37,7 @@ create table if not exists tls_history (
 create table if not exists arbiter_settings (
     id INTEGER not null PRIMARY KEY CHECK (id = 1), -- singleton row, id must be 1
     root_key_id integer references root_key_history (id) on delete RESTRICT, -- if null, means wasn't bootstrapped yet
-    tls_id integer references tls_history (id) on delete RESTRICT,
-    shamir_threshold integer
+    tls_id integer references tls_history (id) on delete RESTRICT
 ) STRICT;
 
 insert into arbiter_settings (id) values (1) on conflict do nothing;
@@ -57,7 +56,6 @@ create table if not exists operator (
 
     share blob not null,
     share_nonce blob not null,
-    share_salt blob not null,
 
     created_at integer not null default(unixepoch ('now')),
     updated_at integer not null default(unixepoch ('now'))

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

@@ -1,164 +1,98 @@
-use crate::{
-    actors::vault::events,
-    db::{self, schema},
-};
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
+use crate::db::{self, DatabasePool, schema};
 use arbiter_proto::{BOOTSTRAP_PATH, home_path};
 
 use diesel::QueryDsl;
 use diesel_async::RunQueryDsl;
-use kameo::{
-    Actor,
-    actor::ActorRef,
-    messages,
-    prelude::{Context, Message},
-};
-use kameo_actors::message_bus::{MessageBus, Register};
-use rand::{RngExt, distr::Alphanumeric, rngs::SysRng};
-use rand_core::UnwrapErr;
-use std::path::{Path, PathBuf};
+use kameo::{Actor, messages};
+use rand::{RngExt, distr::Alphanumeric, make_rng, rngs::StdRng};
 use subtle::ConstantTimeEq as _;
-use tracing::warn;
+use thiserror::Error;
 
 const TOKEN_LENGTH: usize = 64;
 
-async fn write_token_file(path: &Path, content: &str) -> Result<(), std::io::Error> {
-    if let Some(parent) = path.parent() {
-        tokio::fs::create_dir_all(parent).await?;
-    }
-    tokio::fs::write(path, content.as_bytes()).await?;
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::PermissionsExt as _;
-        tokio::fs::set_permissions(path, std::fs::Permissions::from_mode(0o600)).await?;
-    }
-    Ok(())
+pub async fn generate_token() -> Result<String, std::io::Error> {
+    let rng: StdRng = make_rng();
+
+    let token = rng.sample_iter(Alphanumeric).take(TOKEN_LENGTH).fold(
+        String::default(),
+        |mut accum, char| {
+            accum += char.to_string().as_str();
+            accum
+        },
+    );
+
+    tokio::fs::write(home_path()?.join(BOOTSTRAP_PATH), token.as_str()).await?;
+
+    Ok(token)
 }
 
-async fn remove_token_file(path: &Path) {
-    match tokio::fs::remove_file(path).await {
-        Ok(()) => {}
-        Err(error) if error.kind() == std::io::ErrorKind::NotFound => {}
-        Err(error) => warn!(?error, ?path, "Failed to remove bootstrap token file"),
-    }
-}
-
-async fn generate_token(path: &Path) -> Result<SafeCell<[u8; TOKEN_LENGTH]>, std::io::Error> {
-    let mut cell = SafeCell::new([0u8; TOKEN_LENGTH]);
-    {
-        let mut buf = cell.write();
-        for (slot, byte) in buf
-            .iter_mut()
-            .zip(UnwrapErr(SysRng).sample_iter(Alphanumeric))
-        {
-            *slot = byte;
-        }
-    }
-    let token = cell.read_inline(|buf| String::from_utf8_lossy(buf.as_ref()).into_owned());
-    write_token_file(path, &token).await?;
-    Ok(cell)
-}
-
-#[derive(Debug, thiserror::Error)]
+#[derive(Error, Debug)]
 pub enum Error {
     #[error("Database error: {0}")]
     Database(#[from] db::PoolError),
+
     #[error("I/O error: {0}")]
     Io(#[from] std::io::Error),
+
     #[error("Database query error: {0}")]
     Query(#[from] diesel::result::Error),
 }
 
-/// Custodian of the one-time bootstrap token.
-///
-/// The token authorises registering operator identities before the vault
-/// exists. A Shamir committee needs every member registered before it can be
-/// declared, so the token stays valid across several registrations and is
-/// retired by the `Bootstrapped` event rather than by first use, whichever
-/// bootstrap path fired it.
-///
-/// Every daemon start mints a fresh token and overwrites the file: a token
-/// handed out by an earlier run is dead.
+#[derive(Actor)]
 pub struct Bootstrapper {
-    token: Option<SafeCell<[u8; TOKEN_LENGTH]>>,
-    token_path: Option<PathBuf>,
-    events: ActorRef<MessageBus>,
-}
-
-impl Actor for Bootstrapper {
-    type Args = Self;
-    type Error = std::convert::Infallible;
-
-    async fn on_start(args: Self::Args, actor_ref: ActorRef<Self>) -> Result<Self, Self::Error> {
-        let _ = args
-            .events
-            .tell(Register(actor_ref.recipient::<events::Bootstrapped>()))
-            .await;
-        Ok(args)
-    }
+    token: Option<String>,
 }
 
 impl Bootstrapper {
-    pub async fn new(db: &db::DatabasePool, events: ActorRef<MessageBus>) -> Result<Self, Error> {
-        let path = home_path()?.join(BOOTSTRAP_PATH);
-        let mut conn = db.get().await?;
+    pub async fn new(db: &DatabasePool) -> Result<Self, Error> {
+        let row_count: i64 = {
+            let mut conn = db.get().await?;
 
-        let bootstrapped = schema::arbiter_settings::table
-            .select(schema::arbiter_settings::root_key_id)
-            .first::<Option<i32>>(&mut conn)
-            .await?
-            .is_some();
-        if bootstrapped {
-            // A token file can outlive the bootstrap that made it obsolete:
-            // the daemon may have been killed before the event was handled.
-            remove_token_file(&path).await;
-            return Ok(Self {
-                token: None,
-                token_path: None,
-                events,
-            });
-        }
+            schema::operator::table
+                .count()
+                .get_result(&mut conn)
+                .await?
+        };
 
-        Ok(Self {
-            token: Some(generate_token(&path).await?),
-            token_path: Some(path),
-            events,
-        })
-    }
+        let token = if row_count == 0 {
+            let token = generate_token().await?;
+            Some(token)
+        } else {
+            None
+        };
 
-    async fn forget(&mut self) {
-        self.token = None;
-        if let Some(path) = self.token_path.take() {
-            remove_token_file(&path).await;
-        }
+        Ok(Self { token })
     }
 }
 
-impl Message<events::Bootstrapped> for Bootstrapper {
-    type Reply = ();
-
-    async fn handle(
-        &mut self,
-        _: events::Bootstrapped,
-        _ctx: &mut Context<Self, Self::Reply>,
-    ) -> Self::Reply {
-        self.forget().await;
-    }
-}
-    
 #[messages]
 impl Bootstrapper {
     #[message]
-    pub fn verify_token(&mut self, token: Vec<u8>) -> bool {
-        self.token.as_mut().is_some_and(|expected| {
-            expected.read_inline(|bytes| bool::from(bytes.as_ref().ct_eq(token.as_slice())))
+    pub fn is_correct_token(&self, token: String) -> bool {
+        self.token.as_ref().is_some_and(|expected| {
+            let expected_bytes = expected.as_bytes();
+            let token_bytes = token.as_bytes();
+
+            let choice = expected_bytes.ct_eq(token_bytes);
+            bool::from(choice)
         })
     }
 
     #[message]
-    pub fn get_token(&mut self) -> Option<String> {
-        self.token
-            .as_mut()
-            .map(|cell| cell.read_inline(|buf| String::from_utf8_lossy(buf.as_ref()).into_owned()))
+    pub fn consume_token(&mut self, token: String) -> bool {
+        if self.is_correct_token(token) {
+            self.token = None;
+            true
+        } else {
+            false
+        }
+    }
+}
+
+#[messages]
+impl Bootstrapper {
+    #[message]
+    pub fn get_token(&self) -> Option<String> {
+        self.token.clone()
     }
 }

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

@@ -1,6 +1,6 @@
 use crate::{
     actors::vault::{CreateNew, Decrypt, Vault},
-    crypto::integrity::{self, Integrable},
+    crypto::integrity,
     db::{
         DatabaseError, DatabasePool,
         models::{self, EvmWalletId},
@@ -25,35 +25,14 @@ use diesel::{
 use diesel_async::RunQueryDsl;
 use kameo::{Actor, actor::ActorRef, messages};
 use rand::{SeedableRng, rng, rngs::StdRng};
-use tracing::error;
 
 pub use crate::evm::safe_signer;
 
-/// Integrity guard that binds a wallet's encrypted key ID to its Ethereum address.
-/// Both fields are included in the HMAC — swapping `aead_encrypted_id` in the DB
-/// invalidates the envelope MAC, and the AEAD ciphertext is also bound to `address`
-/// as AAD, so decryption fails too.
-#[derive(arbiter_macros::Hashable)]
-struct EvmWalletIntegrity {
-    aead_encrypted_id: i32,
-    address: Address,
-}
-
-impl Integrable for EvmWalletIntegrity {
-    const KIND: &'static str = "evm_wallet";
-}
-
 #[derive(Debug, thiserror::Error)]
 pub enum SignTransactionError {
     #[error("Wallet not found")]
     WalletNotFound,
 
-    #[error("Decrypted key does not match requested wallet address")]
-    KeyAddressMismatch,
-
-    #[error("Internal signing error")]
-    Internal,
-
     #[error("Database error: {0}")]
     Database(#[from] DatabaseError),
 
@@ -85,12 +64,6 @@ pub enum Error {
     Integrity(#[from] integrity::Error),
 }
 
-impl From<diesel::result::Error> for Error {
-    fn from(e: diesel::result::Error) -> Self {
-        Self::Database(DatabaseError::from(e))
-    }
-}
-
 #[derive(Actor)]
 pub struct EvmActor {
     pub vault: ActorRef<Vault>,
@@ -124,39 +97,20 @@ impl EvmActor {
 
         let aead_id: i32 = self
             .vault
-            .ask(CreateNew {
-                plaintext,
-                aad: address.as_slice().to_vec(),
-            })
+            .ask(CreateNew { plaintext })
             .await
             .map_err(|_| Error::VaultSend)?;
 
         let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
-        let wallet_id = conn
-            .exclusive_transaction(async |conn| {
-                let wallet_id: i32 = 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)
-                    .get_result(conn)
-                    .await
-                    .map_err(DatabaseError::from)
-                    .map_err(Error::Database)?;
-
-                integrity::sign_entity(
-                    conn,
-                    &self.vault,
-                    &EvmWalletIntegrity { address, aead_encrypted_id: aead_id },
-                    wallet_id,
-                )
-                .await
-                .map_err(Error::Integrity)?;
-
-                Ok::<i32, Error>(wallet_id)
+        let wallet_id = insert_into(schema::evm_wallet::table)
+            .values(&models::NewEvmWallet {
+                address: address.as_slice().to_vec(),
+                aead_encrypted_id: aead_id,
             })
-            .await?;
+            .returning(schema::evm_wallet::id)
+            .get_result(&mut conn)
+            .await
+            .map_err(DatabaseError::from)?;
 
         Ok((wallet_id, address))
     }
@@ -206,14 +160,29 @@ impl EvmActor {
     }
 
     #[message]
-    pub async fn useragent_delete_grant(
-        &mut self,
-        grant_id: i32,
-    ) -> Result<(), Error> {
-        self.engine
-            .revoke_grant(grant_id)
-            .await
-            .map_err(Error::from)
+    #[expect(clippy::unused_async, reason = "reserved for impl")]
+    pub async fn operator_delete_grant(&mut self, _grant_id: i32) -> Result<(), Error> {
+        // let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
+        // let vault = self.vault.clone();
+
+        // diesel_async::AsyncConnection::transaction(&mut conn, |conn| {
+        //     Box::pin(async move {
+        //         diesel::update(schema::evm_basic_grant::table)
+        //             .filter(schema::evm_basic_grant::id.eq(grant_id))
+        //             .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]
@@ -287,51 +256,16 @@ impl EvmActor {
             .ok_or(SignTransactionError::WalletNotFound)?;
         drop(conn);
 
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
-        let attestation = integrity::verify_entity(
-            &mut conn,
-            &self.vault,
-            &EvmWalletIntegrity {
-                address: wallet_address,
-                aead_encrypted_id: wallet.aead_encrypted_id,
-            },
-            wallet.id.to_raw(),
-        )
-        .await
-        .map_err(|e| {
-            error!(?e, ?wallet.id, "EVM wallet integrity check failed");
-            SignTransactionError::Internal
-        })?;
-        drop(conn);
-
-        if attestation != integrity::AttestationStatus::Attested {
-            error!(
-                ?wallet.id,
-                "EVM wallet integrity unavailable; refusing to sign"
-            );
-            return Err(SignTransactionError::Internal);
-        }
-
         let raw_key: SafeCell<Vec<u8>> = self
             .vault
             .ask(Decrypt {
                 aead_id: wallet.aead_encrypted_id,
-                aad: wallet.address.clone(),
             })
             .await
             .map_err(|_| SignTransactionError::VaultSend)?;
 
         let signer = safe_signer::SafeSigner::from_cell(raw_key)?;
 
-        if signer.address() != wallet_address {
-            error!(
-                expected = %wallet_address,
-                actual = %signer.address(),
-                "Decrypted private key address does not match requested wallet"
-            );
-            return Err(SignTransactionError::KeyAddressMismatch);
-        }
-
         self.engine
             .evaluate_transaction(wallet_access, transaction.clone(), RunKind::Execution)
             .await?;

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

@@ -11,9 +11,7 @@ use kameo::{
     prelude::{ActorId, ActorRef, ActorStopReason, Context, WeakActorRef},
     reply::ReplySender,
 };
-use std::{ops::ControlFlow, time::Duration};
-
-const APPROVAL_TIMEOUT: Duration = Duration::from_secs(30);
+use std::ops::ControlFlow;
 
 pub struct Args {
     pub client: ClientProfile,
@@ -66,14 +64,6 @@ impl Actor for ClientApprovalController {
                 .await;
         }
 
-        let weak = actor_ref.downgrade();
-        tokio::spawn(async move {
-            tokio::time::sleep(APPROVAL_TIMEOUT).await;
-            if let Some(r) = weak.upgrade() {
-                let _ = r.tell(OnApprovalTimeout {}).await;
-            }
-        });
-
         Ok(this)
     }
 
@@ -114,14 +104,4 @@ impl ClientApprovalController {
             ctx.stop();
         }
     }
-
-    /// Fired after `APPROVAL_TIMEOUT` elapses. Any operator that hasn't responded
-    /// by then is treated as a denial to prevent zombie sessions from blocking the flow.
-    #[message(ctx)]
-    pub fn on_approval_timeout(&mut self, ctx: &mut Context<Self, ()>) {
-        if self.pending > 0 {
-            self.send_reply(Ok(false));
-            ctx.stop();
-        }
-    }
 }

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

@@ -20,8 +20,6 @@ pub mod client_connect_approval;
 
 pub struct FlowCoordinator {
     pub clients: HashMap<ActorId, ActorRef<ClientSession>>,
-    /// Maps DB `client_id` → `ActorId` for fast connected-client lookup.
-    client_ids: HashMap<i32, ActorId>,
     operator_registry: ActorRef<OperatorRegistry>,
 }
 
@@ -29,7 +27,6 @@ impl FlowCoordinator {
     pub fn new(operator_registry: ActorRef<OperatorRegistry>) -> Self {
         Self {
             clients: HashMap::default(),
-            client_ids: HashMap::default(),
             operator_registry,
         }
     }
@@ -51,7 +48,6 @@ impl Actor for FlowCoordinator {
         _: ActorStopReason,
     ) -> Result<ControlFlow<ActorStopReason>, Self::Error> {
         if self.clients.remove(&id).is_some() {
-            self.client_ids.retain(|_, actor_id| *actor_id != id);
             info!(
                 ?id,
                 actor = "FlowCoordinator",
@@ -79,28 +75,14 @@ impl FlowCoordinator {
     #[message(ctx)]
     pub async fn register_client(
         &mut self,
-        client_id: i32,
         actor: ActorRef<ClientSession>,
         ctx: &mut Context<Self, ()>,
     ) {
-        info!(id = %actor.id(), client_id, actor = "FlowCoordinator", event = "client.connected");
+        info!(id = %actor.id(), actor = "FlowCoordinator", event = "client.connected");
         ctx.actor_ref().link(&actor).await;
-        self.client_ids.insert(client_id, actor.id());
         self.clients.insert(actor.id(), actor);
     }
 
-    #[message]
-    pub fn is_client_connected(&self, client_id: i32) -> bool {
-        self.client_ids.contains_key(&client_id)
-    }
-
-    /// Returns the DB `client_ids` of all currently connected SDK clients.
-    /// Used by operator sessions on startup to seed their approved-client set.
-    #[message]
-    pub fn get_connected_client_ids(&self) -> Vec<i32> {
-        self.client_ids.keys().copied().collect()
-    }
-
     #[message(ctx)]
     pub async fn request_client_approval(
         &mut self,

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

@@ -1,7 +1,7 @@
 use crate::{
     actors::{
         bootstrap::Bootstrapper, evm::EvmActor, flow_coordinator::FlowCoordinator,
-        operator_registry::OperatorRegistry, vault::Vault, vault_coordinator::VaultCoordinator,
+        operator_registry::OperatorRegistry, vault::Vault,
     },
     db,
 };
@@ -15,22 +15,20 @@ pub mod evm;
 pub mod flow_coordinator;
 pub mod operator_registry;
 pub mod vault;
-pub mod vault_coordinator;
 
 #[derive(Error, Debug)]
 pub enum SpawnError {
     #[error("Failed to spawn Bootstrapper actor")]
     Bootstrapper(#[from] bootstrap::Error),
+
     #[error("Failed to spawn Vault actor")]
     Vault(#[from] vault::Error),
-    #[error("Failed to spawn VaultCoordinator actor")]
-    VaultCoordinator(#[from] vault_coordinator::Error),
 }
 
+/// Long-lived actors that are shared across all connections and handle global state and operations
 #[derive(Clone)]
 pub struct GlobalActors {
     pub vault: ActorRef<Vault>,
-    pub vault_coordinator: ActorRef<VaultCoordinator>,
     pub bootstrapper: ActorRef<Bootstrapper>,
     pub flow_coordinator: ActorRef<FlowCoordinator>,
     pub operator_registry: ActorRef<OperatorRegistry>,
@@ -44,22 +42,18 @@ impl GlobalActors {
     }
 
     pub async fn spawn(db: db::DatabasePool) -> Result<Self, SpawnError> {
-        let events = Self::spawn_message_bus();
-        let vault = Vault::spawn(Vault::new(db.clone(), events.clone()).await?);
-        let bootstrapper = Bootstrapper::spawn(Bootstrapper::new(&db, events.clone()).await?);
-        let vault_coordinator =
-            VaultCoordinator::spawn(VaultCoordinator::new(db.clone(), vault.clone()));
+        let message_bus = Self::spawn_message_bus();
+        let key_holder = Vault::spawn(Vault::new(db.clone(), message_bus.clone()).await?);
         let operator_registry = OperatorRegistry::spawn(OperatorRegistry::default());
         Ok(Self {
-            bootstrapper,
-            evm: EvmActor::spawn(EvmActor::new(vault.clone(), db.clone())),
-            vault,
-            vault_coordinator,
+            bootstrapper: Bootstrapper::spawn(Bootstrapper::new(&db).await?),
+            evm: EvmActor::spawn(EvmActor::new(key_holder.clone(), db)),
+            vault: key_holder,
             flow_coordinator: FlowCoordinator::spawn(FlowCoordinator::new(
                 operator_registry.clone(),
             )),
             operator_registry,
-            events,
+            events: message_bus,
         })
     }
 }

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

@@ -20,8 +20,8 @@ impl Actor for OperatorRegistry {
 
     type Error = Infallible;
 
-    fn on_start(args: Self::Args, _: ActorRef<Self>) -> impl Future<Output = Result<Self, Self::Error>> {
-        std::future::ready(Ok(args))
+    async fn on_start(args: Self::Args, _: ActorRef<Self>) -> Result<Self, Self::Error> {
+        Ok(args)
     }
 
     async fn on_link_died(

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

@@ -1,30 +1,31 @@
+use std::collections::HashMap;
+
 use crate::{
     crypto::{
-        KeyCell,
+        KeyCell, derive_key,
         encryption::v1::{self, Nonce},
         integrity::v1::HmacSha256,
     },
     db::{
         self,
-        custody::{self, CustodyRecord},
-        models::{self, RootKeyHistory, RootKeyHistoryId},
+        models::{self, OperatorId, OperatorIdentityId, RootKeyHistory, RootKeyHistoryId},
         schema::{self},
     },
 };
-
 use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
 
 use chrono::Utc;
 use diesel::{
     ExpressionMethods as _, OptionalExtension, QueryDsl, SelectableHelper,
-    dsl::{insert_into, update},
+    dsl::{count, insert_into, update},
+    select,
 };
 use diesel_async::{AsyncConnection, RunQueryDsl};
-use hmac::{KeyInit as _, Mac as _};
+use hmac::{KeyInit as _, Mac as _, digest::common};
 use kameo::{Actor, Reply, actor::ActorRef, messages};
 use kameo_actors::message_bus::{MessageBus, Publish};
 use strum::{EnumDiscriminants, IntoDiscriminant};
-use tracing::{error, info, warn};
+use tracing::{error, info};
 
 pub mod events {
     #[derive(Clone, Copy)]
@@ -47,8 +48,6 @@ pub enum Error {
     Sealed,
     #[error("Invalid key provided")]
     InvalidKey,
-    #[error("Vault locked: too many failed unseal attempts")]
-    LockedOut,
 
     #[error("Requested aead entry not found")]
     NotFound,
@@ -62,14 +61,17 @@ pub enum Error {
     #[error("Database transaction error: {0}")]
     DatabaseTransaction(#[from] diesel::result::Error),
 
-    #[error("Custody storage error: {0}")]
-    Custody(#[from] custody::Error),
-
     #[error("Broken database")]
     BrokenDatabase,
+}
 
-    #[error("Integrity key version mismatch: envelope uses key {envelope:?}, current key is {current:?}")]
-    KeyVersionMismatch { envelope: RootKeyHistoryId, current: RootKeyHistoryId },
+#[derive(Debug, thiserror::Error)]
+pub enum UnsealError {}
+
+#[derive(Debug, thiserror::Error)]
+pub enum BootstrapError {
+    #[error("That operator already contributed his share")]
+    AlreadyContributed,
 }
 
 struct Unsealed {
@@ -83,14 +85,19 @@ enum State {
     #[default]
     Unbootstrapped,
 
+    Bootstrapping {
+        declared_operators: u64,
+        current_passphrases: HashMap<OperatorIdentityId, SafeCell<Vec<u8>>>,
+    },
+
     Sealed {
+        threshold: u64, // basically, quorum size
         root_key_history_id: RootKeyHistoryId,
+        current_shares: HashMap<OperatorId, SafeCell<Vec<u8>>>,
     },
     Unsealed(Unsealed),
 }
 
-const MAX_UNSEAL_ATTEMPTS: u32 = 5;
-
 /// Manages vault root key and tracks current state of the vault (bootstrapped/unbootstrapped, sealed/unsealed).
 ///
 /// Provides API for encrypting and decrypting data using the vault root key.
@@ -100,10 +107,8 @@ pub struct Vault {
     db: db::DatabasePool,
     state: State,
     events: ActorRef<MessageBus>,
-    unseal_failures: u32,
 }
 
-#[messages]
 impl Vault {
     pub async fn new(db: db::DatabasePool, events: ActorRef<MessageBus>) -> Result<Self, Error> {
         let state = {
@@ -116,19 +121,22 @@ impl Vault {
                 .await?;
 
             match root_key_history {
-                Some(root_key_history) => State::Sealed {
-                    root_key_history_id: root_key_history.id,
-                },
+                Some(root_key_history) => {
+                    let operator_count: i64 = schema::operator::table
+                        .count()
+                        .get_result(&mut conn)
+                        .await?;
+                    State::Sealed {
+                        root_key_history_id: root_key_history.id,
+                        current_shares: HashMap::default(),
+                        threshold: shamir_threshold(operator_count.cast_unsigned()), // invariant: db couldn't return negative number of rows
+                    }
+                }
                 None => State::Unbootstrapped,
             }
         };
 
-        Ok(Self {
-            db,
-            state,
-            events,
-            unseal_failures: 0,
-        })
+        Ok(Self { db, state, events })
     }
 
     // Exclusive transaction to avoid race condtions if multiple vaults write
@@ -172,22 +180,28 @@ impl Vault {
     const fn expect_unsealed(state: &mut State) -> Result<&mut Unsealed, Error> {
         match state {
             State::Unsealed(unsealed) => Ok(unsealed),
+            State::Bootstrapping { .. } => Err(Error::NotBootstrapped),
             State::Unbootstrapped => Err(Error::NotBootstrapped),
             State::Sealed { .. } => Err(Error::Sealed),
         }
     }
 
-    /// Create the root key and take the vault into the unsealed state.
-    #[message]
-    pub async fn bootstrap(
-        &mut self,
-        mut seal_key: KeyCell,
-        custody: Option<CustodyRecord>,
-    ) -> Result<(), Error> {
-        if !matches!(self.state, State::Unbootstrapped) {
+    pub async fn finalize_bootstrap(&mut self) -> Result<(), Error> {
+        let State::Bootstrapping {
+            declared_operators,
+            current_passphrases,
+        } = &mut self.state
+        else {
             return Err(Error::AlreadyBootstrapped);
-        }
+        };
         let mut root_key = KeyCell::new_secure_random();
+        let root_key_salt = v1::generate_salt();
+
+        let mut seal_key = KeyCell::new_secure_random();
+
+        let shares = seal_key.0.read_inline(|seal_key| {
+            generate_shamir_shares(current_passphrases.len() as u64, seal_key.as_slice())
+        });
 
         // Zero nonces are fine because they are one-time
         let root_key_nonce = Nonce::default();
@@ -203,11 +217,21 @@ impl Vault {
                 })
         })?;
 
+        let data_encryption_nonce_bytes = data_encryption_nonce.to_vec();
         let mut conn = self.db.get().await?;
 
-        let data_encryption_nonce_bytes = data_encryption_nonce.to_vec();
         let root_key_history_id = conn
             .transaction(async |conn| {
+                for ((operator_id, raw_passphrase), raw_share) in
+                    current_passphrases.iter_mut().zip(shares.iter())
+                {
+                    let salt = v1::generate_salt();
+                    let mut share_seal_key = derive_key(&mut raw_passphrase, &salt);
+                    let share_encryption_nonce = Nonce::default();
+
+                    let share_key = derive_key(&mut raw_passphrase, &salt);
+                }
+
                 let root_key_history_id = insert_into(schema::root_key_history::table)
                     .values(&models::NewRootKeyHistory {
                         ciphertext: root_key_ciphertext.clone(),
@@ -215,7 +239,7 @@ impl Vault {
                         root_key_encryption_nonce: root_key_nonce.to_vec(),
                         data_encryption_nonce: data_encryption_nonce_bytes.clone(),
                         schema_version: 1,
-                        salt: v1::generate_salt().to_vec(),
+                        salt: root_key_salt.to_vec(),
                     })
                     .returning(schema::root_key_history::id)
                     .get_result(&mut *conn)
@@ -226,11 +250,9 @@ impl Vault {
                     .execute(&mut *conn)
                     .await?;
 
-                if let Some(record) = custody.as_ref() {
-                    custody::write_record(&mut *conn, record).await?;
-                }
-
-                Result::<_, Error>::Ok(RootKeyHistoryId::from_raw(root_key_history_id))
+                Result::<_, diesel::result::Error>::Ok(RootKeyHistoryId::from_raw(
+                    root_key_history_id,
+                ))
             })
             .await?;
 
@@ -244,15 +266,59 @@ impl Vault {
 
         Ok(())
     }
+}
 
+// Seal / unseal / bootstrap stuff. Will be separated into another actor, eventually
+#[messages]
+impl Vault {
     #[message]
-    pub async fn try_unseal(&mut self, mut seal_key: KeyCell) -> Result<(), Error> {
-        if self.unseal_failures >= MAX_UNSEAL_ATTEMPTS {
-            return Err(Error::LockedOut);
+    pub async fn start_bootstrap(&mut self, declared_operators: u64) -> Result<(), Error> {
+        if !matches!(&self.state, State::Unbootstrapped) {
+            return Err(Error::AlreadyBootstrapped);
         }
 
+        self.state = State::Bootstrapping {
+            declared_operators,
+            current_passphrases: HashMap::default(),
+        };
+        Ok(())
+    }
+
+    #[message]
+    pub async fn contribute_bootstrap(
+        &mut self,
+        operator: OperatorIdentityId,
+        key_raw: SafeCell<Vec<u8>>,
+    ) -> Result<(), Error> {
+        let State::Bootstrapping {
+            current_passphrases,
+            declared_operators,
+        } = &mut self.state
+        else {
+            return Err(Error::AlreadyBootstrapped);
+        };
+
+        if current_passphrases.contains_key(&operator) {
+            return Err(Error::AlreadyBootstrapped);
+        }
+        current_passphrases.insert(operator, key_raw);
+
+        if current_passphrases.len() == declared_operators {
+            return self.finalize_bootstrap(seal_key_raw);
+        }
+
+        Ok(())
+    }
+
+    #[message]
+    pub async fn contribute_unseal(
+        &mut self,
+        operator: OperatorId,
+        key_raw: SafeCell<Vec<u8>>,
+    ) -> Result<(), Error> {
         let State::Sealed {
             root_key_history_id,
+            current_shares,
         } = &self.state
         else {
             return Err(Error::NotBootstrapped);
@@ -268,6 +334,13 @@ impl Vault {
                 .await?
         };
 
+        let salt = &current_key.salt;
+        let salt = v1::Salt::try_from(salt.as_slice()).map_err(|_| {
+            error!("Broken database: invalid salt for root key");
+            Error::BrokenDatabase
+        })?;
+        let mut seal_key = derive_key(key_raw, &salt);
+
         let mut root_key = SafeCell::new(current_key.ciphertext.clone());
 
         let nonce =
@@ -276,27 +349,13 @@ impl Vault {
                 Error::BrokenDatabase
             })?;
 
-        if seal_key
+        seal_key
             .decrypt_in_place(&nonce, v1::ROOT_KEY_TAG, &mut root_key)
-            .is_err()
-        {
-            self.unseal_failures += 1;
-            if self.unseal_failures >= MAX_UNSEAL_ATTEMPTS {
-                error!(
-                    attempts = self.unseal_failures,
-                    "Vault locked: maximum failed unseal attempts reached"
-                );
-            } else {
-                warn!(
-                    attempts = self.unseal_failures,
-                    remaining = MAX_UNSEAL_ATTEMPTS - self.unseal_failures,
-                    "Failed unseal attempt"
-                );
-            }
-            return Err(Error::InvalidKey);
-        }
+            .map_err(|err| {
+                error!(?err, "Failed to unseal root key: invalid seal key");
+                Error::InvalidKey
+            })?;
 
-        self.unseal_failures = 0;
         self.state = State::Unsealed(Unsealed {
             root_key_history_id: current_key.id,
             root_key: KeyCell::try_from(root_key).map_err(|err| {
@@ -311,10 +370,27 @@ impl Vault {
         Ok(())
     }
 
-    /// Decrypts an AEAD entry. The `aad` must match the value used at encryption time;
-    /// a mismatch causes authentication failure, preventing cross-wallet key swaps.
     #[message]
-    pub async fn decrypt(&mut self, aead_id: i32, aad: Vec<u8>) -> Result<SafeCell<Vec<u8>>, Error> {
+    pub async fn seal(&mut self) -> Result<(), Error> {
+        let Unsealed {
+            root_key_history_id,
+            ..
+        } = Self::expect_unsealed(&mut self.state)?;
+
+        self.state = State::Sealed {
+            root_key_history_id: *root_key_history_id,
+            current_shares: HashMap::new(),
+        };
+        let _ = self.events.tell(Publish(events::VaultResealed)).await;
+        Ok(())
+    }
+}
+
+// Server-side cryptographic operations
+#[messages]
+impl Vault {
+    #[message]
+    pub async fn decrypt(&mut self, aead_id: i32) -> Result<SafeCell<Vec<u8>>, Error> {
         let Unsealed { root_key, .. } = Self::expect_unsealed(&mut self.state)?;
 
         let row: models::AeadEncrypted = {
@@ -336,15 +412,13 @@ impl Vault {
             Error::BrokenDatabase
         })?;
         let mut output = SafeCell::new(row.ciphertext);
-        root_key.decrypt_in_place(&nonce, &aad, &mut output)?;
+        root_key.decrypt_in_place(&nonce, v1::TAG, &mut output)?;
         Ok(output)
     }
 
-    /// Creates a new `aead_encrypted` entry and returns its ID.
-    /// The `aad` is bound into the ciphertext and must be reproduced exactly at decryption time.
     // Creates new `aead_encrypted` entry in the database and returns it's ID
     #[message]
-    pub async fn create_new(&mut self, mut plaintext: SafeCell<Vec<u8>>, aad: Vec<u8>) -> Result<i32, Error> {
+    pub async fn create_new(&mut self, mut plaintext: SafeCell<Vec<u8>>) -> Result<i32, Error> {
         let Unsealed {
             root_key,
             root_key_history_id,
@@ -356,7 +430,7 @@ impl Vault {
 
         let mut ciphertext_buffer = plaintext.write();
         let ciphertext_buffer: &mut Vec<u8> = ciphertext_buffer.as_mut();
-        root_key.encrypt_in_place(&nonce, &aad, &mut *ciphertext_buffer)?;
+        root_key.encrypt_in_place(&nonce, v1::TAG, &mut *ciphertext_buffer)?;
 
         let ciphertext = std::mem::take(ciphertext_buffer);
 
@@ -392,10 +466,12 @@ impl Vault {
             root_key_history_id,
         } = Self::expect_unsealed(&mut self.state)?;
 
-        let mut hmac = root_key.0.read_inline(|k| {
-            HmacSha256::new_from_slice(k)
-                .unwrap_or_else(|_| unreachable!("HMAC accepts keys of any size"))
-        });
+        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_raw().to_be_bytes());
         hmac.update(&mac_input);
 
@@ -416,40 +492,62 @@ impl Vault {
         } = Self::expect_unsealed(&mut self.state)?;
 
         if *root_key_history_id != key_version {
-            return Err(Error::KeyVersionMismatch {
-                envelope: key_version,
-                current: *root_key_history_id,
-            });
+            return Ok(false);
         }
 
-        let mut hmac = root_key.0.read_inline(|k| {
-            HmacSha256::new_from_slice(k)
-                .unwrap_or_else(|_| unreachable!("HMAC accepts keys of any size"))
-        });
+        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_raw().to_be_bytes());
         hmac.update(&mac_input);
 
         Ok(hmac.verify_slice(&expected_mac).is_ok())
     }
+}
 
-    #[message]
-    pub async fn seal(&mut self) -> Result<(), Error> {
-        let Unsealed {
-            root_key_history_id,
-            ..
-        } = Self::expect_unsealed(&mut self.state)?;
-
-        self.state = State::Sealed {
-            root_key_history_id: *root_key_history_id,
-        };
-        let _ = self.events.tell(Publish(events::VaultResealed)).await;
-        Ok(())
+/// According to the spec, the quorum is 50% + 1
+/// with exception for 1 and 2 operators, those require exactly the number of operators registered
+fn shamir_threshold(comittee_size: u64) -> u64 {
+    if comittee_size == 2 || comittee_size == 1 {
+        return comittee_size;
     }
+
+    let half_comittee = match comittee_size % 2 != 0 {
+        true => (comittee_size - 1) / 2,
+        false => comittee_size / 2,
+    };
+
+    half_comittee + 1
+}
+
+/// Beware: this function accepts raw key references (without memory protection)
+fn generate_shamir_shares(threshold: u64, key: &[u8]) -> Vec<SafeCell<Vec<u8>>> {
+    use vsss_rs::{shamir, *};
+
+    type P256Share = DefaultShare<IdentifierPrimeField<Scalar>, IdentifierPrimeField<Scalar>>;
+
+    let mut osrng = rand_core::OsRng::default();
+    let sk = SecretKey::random(&mut osrng);
+    let nzs = sk.to_nonzero_scalar();
+    let shared_secret = IdentifierPrimeField(*nzs.as_ref());
+    let res = shamir::split_secret::<P256Share>(2, 3, &shared_secret, &mut osrng);
+    assert!(res.is_ok());
+    let shares = res.unwrap();
+    let res = shares.combine();
+    assert!(res.is_ok());
+    let scalar = res.unwrap();
+    let nzs_dup = NonZeroScalar::from_repr(scalar.0.to_repr()).unwrap();
+    let sk_dup = SecretKey::from(nzs_dup);
+    assert_eq!(sk_dup.to_bytes(), sk.to_bytes());
 }
 
 #[cfg(test)]
 mod tests {
     use crate::actors::GlobalActors;
+    use arbiter_crypto::safecell::SafeCellHandle as _;
 
     use super::*;
 
@@ -457,8 +555,8 @@ mod tests {
         let mut actor = Vault::new(db.clone(), GlobalActors::spawn_message_bus())
             .await
             .unwrap();
-        let seal_key = KeyCell::from([0u8; 32]);
-        actor.bootstrap(seal_key, None).await.unwrap();
+        let seal_key = SafeCell::new(b"test-seal-key".to_vec());
+        actor.finalize_bootstrap(seal_key).await.unwrap();
         actor
     }
 
@@ -467,13 +565,12 @@ mod tests {
     async fn nonce_monotonic_even_when_nonce_allocation_interleaves() {
         let db = db::create_test_pool().await;
         let mut actor = bootstrapped_actor(&db).await;
-
-        let State::Unsealed(Unsealed {
-            root_key_history_id,
-            ..
-        }) = actor.state
-        else {
-            panic!("expected unsealed state")
+        let root_key_history_id = match actor.state {
+            State::Unsealed(Unsealed {
+                root_key_history_id,
+                ..
+            }) => root_key_history_id,
+            _ => panic!("expected unsealed state"),
         };
 
         let n1 = Vault::get_new_nonce(&db, root_key_history_id)
@@ -493,7 +590,7 @@ mod tests {
         assert_eq!(root_row.data_encryption_nonce, n2.to_vec());
 
         let id = actor
-            .create_new(SafeCell::new(b"post-interleave".to_vec()), b"test-aad".to_vec())
+            .create_new(SafeCell::new(b"post-interleave".to_vec()))
             .await
             .unwrap();
         let row: models::AeadEncrypted = schema::aead_encrypted::table

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

@@ -1,378 +0,0 @@
-//! Coordinates the multi-operator ceremonies that create and open the vault.
-//!
-//! The coordinator collects one passphrase per committee member, then hands the
-//! assembled material to [`Vault`] in a single message. It owns no Diesel code:
-//! everything it reads or writes goes through [`db::custody`].
-
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
-use argon2::RECOMMENDED_SALT_LEN;
-use kameo::{Actor, actor::ActorRef, error::SendError, messages};
-use rand::rngs::SysRng;
-use rand_core::{Rng as _, UnwrapErr};
-
-use crate::{
-    actors::vault::{self, Bootstrap, TryUnseal, Vault},
-    crypto::{KeyCell, derive_key, encryption::v1::Nonce, shamir},
-    db::{
-        self,
-        custody::{self, CustodyRecord, EncryptedShare},
-        models::OperatorId,
-    },
-};
-
-const SHARE_AAD: &[u8] = b"arbiter/shamir-share/v1";
-
-#[derive(Debug, thiserror::Error)]
-pub enum Error {
-    #[error("An ordinary committee is already being coordinated")]
-    AlreadyBootstrapping,
-    #[error("An unseal is already being coordinated")]
-    AlreadyUnsealing,
-    #[error("Bootstrap is not in progress")]
-    NotBootstrapping,
-    #[error("The operator already contributed")]
-    DuplicateContribution,
-    #[error("The ordinary committee cannot be empty")]
-    EmptyCommittee,
-    #[error("Two-operator committees are unsupported")]
-    UnsupportedCommittee,
-    #[error(
-        "The ordinary committee cannot exceed {} members",
-        shamir::MAX_COMMITTEE_SIZE
-    )]
-    CommitteeTooLarge,
-    #[error("Invalid passphrase")]
-    InvalidPassphrase,
-    #[error("Broken database")]
-    BrokenDatabase,
-    #[error("Shamir error: {0}")]
-    Shamir(String),
-    #[error("Database connection error: {0}")]
-    DatabaseConnection(#[from] db::PoolError),
-    #[error("Custody storage error: {0}")]
-    Custody(#[from] custody::Error),
-    #[error("Encryption error")]
-    Encryption,
-    #[error("The vault is already bootstrapped")]
-    AlreadyBootstrapped,
-    #[error("Vault error")]
-    Vault,
-}
-
-/// Passphrases gathered so far, in contribution order.
-///
-/// A `Vec` rather than a map because [`SafeCell`] values are neither cloneable
-/// nor hashable, and a committee holds at most
-/// [`shamir::MAX_COMMITTEE_SIZE`] of them.
-#[derive(Default)]
-struct Contributions(Vec<(OperatorId, SafeCell<Vec<u8>>)>);
-
-impl Contributions {
-    fn contains(&self, operator_id: OperatorId) -> bool {
-        self.0.iter().any(|(id, _)| *id == operator_id)
-    }
-
-    fn put(&mut self, operator_id: OperatorId, passphrase: SafeCell<Vec<u8>>) {
-        match self.0.iter_mut().find(|(id, _)| *id == operator_id) {
-            Some(slot) => slot.1 = passphrase,
-            None => self.0.push((operator_id, passphrase)),
-        }
-    }
-
-    const fn len(&self) -> usize {
-        self.0.len()
-    }
-
-    fn operators(&self) -> Vec<OperatorId> {
-        self.0.iter().map(|(id, _)| *id).collect()
-    }
-}
-
-enum CoordinatorState {
-    Idle,
-    Bootstrapping {
-        /// The operator that declared the committee. Only they may re-declare
-        /// it, which is the way out of a ceremony the others never finish.
-        declarer: OperatorId,
-        declared_count: usize,
-        contributions: Contributions,
-        retryable: bool,
-    },
-    Unsealing {
-        threshold: usize,
-        contributions: Contributions,
-        retryable: bool,
-    },
-}
-
-#[derive(Actor)]
-pub struct VaultCoordinator {
-    db: db::DatabasePool,
-    vault: ActorRef<Vault>,
-    state: CoordinatorState,
-}
-
-impl VaultCoordinator {
-    pub const fn new(db: db::DatabasePool, vault: ActorRef<Vault>) -> Self {
-        Self {
-            db,
-            vault,
-            state: CoordinatorState::Idle,
-        }
-    }
-}
-
-/// Explain why a committee size was rejected.
-const fn committee_error(declared_count: usize) -> Error {
-    match declared_count {
-        0 => Error::EmptyCommittee,
-        2 => Error::UnsupportedCommittee,
-        _ => Error::CommitteeTooLarge,
-    }
-}
-
-fn encrypt_share(
-    passphrase: &mut SafeCell<Vec<u8>>,
-    share: &[u8],
-) -> Result<EncryptedShare, Error> {
-    let mut salt = [0u8; RECOMMENDED_SALT_LEN];
-    UnwrapErr(SysRng).fill_bytes(&mut salt);
-
-    let nonce = Nonce::default();
-    let ciphertext = derive_key(passphrase, &salt)
-        .encrypt(&nonce, SHARE_AAD, share)
-        .map_err(|_| Error::Encryption)?;
-
-    Ok(EncryptedShare {
-        ciphertext,
-        nonce: nonce.to_vec(),
-        salt: salt.to_vec(),
-    })
-}
-
-fn decrypt_share(
-    passphrase: &mut SafeCell<Vec<u8>>,
-    share: EncryptedShare,
-) -> Result<SafeCell<Vec<u8>>, Error> {
-    let nonce = Nonce::try_from(share.nonce.as_slice()).map_err(|()| Error::BrokenDatabase)?;
-
-    let mut buffer = SafeCell::new(share.ciphertext);
-    derive_key(passphrase, &share.salt)
-        .decrypt_in_place(&nonce, SHARE_AAD, &mut buffer)
-        .map_err(|_| Error::InvalidPassphrase)?;
-
-    Ok(buffer)
-}
-
-const fn bootstrap_error(error: &SendError<Bootstrap, vault::Error>) -> Error {
-    match error {
-        SendError::HandlerError(vault::Error::AlreadyBootstrapped) => Error::AlreadyBootstrapped,
-        _ => Error::Vault,
-    }
-}
-
-/// Build the custody record and hand it to the vault, which stores it in the
-/// same transaction as the root key.
-async fn finalize_bootstrap(
-    vault: &ActorRef<Vault>,
-    contributions: &mut Contributions,
-) -> Result<(), Error> {
-    let total = contributions.len();
-    let threshold = shamir::shamir_threshold(total).ok_or_else(|| committee_error(total))?;
-
-    let mut seal_key = KeyCell::new_secure_random();
-    let mut shares = shamir::split_key(threshold, total, &mut seal_key, UnwrapErr(SysRng))
-        .map_err(|error| Error::Shamir(error.to_string()))?;
-
-    if shares.len() < total {
-        return Err(Error::Shamir("missing share for operator".to_owned()));
-    }
-
-    let mut encrypted = Vec::with_capacity(total);
-    for ((operator_id, passphrase), share) in contributions.0.iter_mut().zip(shares.iter_mut()) {
-        let share = share.read_inline(|share| encrypt_share(passphrase, share))?;
-        encrypted.push((*operator_id, share));
-    }
-
-    vault
-        .ask(Bootstrap {
-            seal_key,
-            custody: Some(CustodyRecord {
-                threshold,
-                shares: encrypted,
-            }),
-        })
-        .await
-        .map_err(|error| bootstrap_error(&error))
-}
-
-/// Reconstruct the seal key from the contributed passphrases and unseal.
-async fn finalize_unseal(
-    db: &db::DatabasePool,
-    vault: &ActorRef<Vault>,
-    threshold: usize,
-    contributions: &mut Contributions,
-) -> Result<(), Error> {
-    let stored = {
-        let mut conn = db.get().await?;
-        custody::shares(&mut conn, &contributions.operators()).await?
-    };
-
-    let mut plaintext = Vec::with_capacity(stored.len());
-    for ((_, passphrase), share) in contributions.0.iter_mut().zip(stored) {
-        plaintext.push(decrypt_share(passphrase, share)?);
-    }
-
-    let seal_key = shamir::combine_shares(threshold, &mut plaintext)
-        .map_err(|error| Error::Shamir(error.to_string()))?;
-
-    vault
-        .ask(TryUnseal { seal_key })
-        .await
-        .map_err(|_| Error::Vault)
-}
-
-#[messages]
-impl VaultCoordinator {
-    /// Announce how many operators will contribute to the bootstrap.
-    ///
-    /// The declaring operator may re-declare to restart the ceremony; that is
-    /// the only way to release a committee whose members never all show up.
-    #[message]
-    pub fn start_bootstrap(
-        &mut self,
-        operator_id: OperatorId,
-        declared_count: usize,
-    ) -> Result<(), Error> {
-        if shamir::shamir_threshold(declared_count).is_none() {
-            return Err(committee_error(declared_count));
-        }
-
-        match &self.state {
-            CoordinatorState::Unsealing { .. } => return Err(Error::AlreadyUnsealing),
-            CoordinatorState::Bootstrapping { declarer, .. } if *declarer != operator_id => {
-                return Err(Error::AlreadyBootstrapping);
-            }
-            CoordinatorState::Bootstrapping { .. } | CoordinatorState::Idle => {}
-        }
-
-        self.state = CoordinatorState::Bootstrapping {
-            declarer: operator_id,
-            declared_count,
-            contributions: Contributions::default(),
-            retryable: false,
-        };
-        Ok(())
-    }
-
-    #[message]
-    pub async fn contribute_bootstrap(
-        &mut self,
-        operator_id: OperatorId,
-        passphrase: SafeCell<Vec<u8>>,
-    ) -> Result<bool, Error> {
-        let CoordinatorState::Bootstrapping {
-            declared_count,
-            contributions,
-            retryable,
-            ..
-        } = &mut self.state
-        else {
-            return Err(Error::NotBootstrapping);
-        };
-
-        if contributions.contains(operator_id) && !*retryable {
-            return Err(Error::DuplicateContribution);
-        }
-        contributions.put(operator_id, passphrase);
-        *retryable = false;
-
-        if contributions.len() < *declared_count {
-            return Ok(false);
-        }
-
-        let state = std::mem::replace(&mut self.state, CoordinatorState::Idle);
-        let CoordinatorState::Bootstrapping {
-            declarer,
-            declared_count,
-            mut contributions,
-            ..
-        } = state
-        else {
-            unreachable!("state was matched as Bootstrapping above")
-        };
-
-        match finalize_bootstrap(&self.vault, &mut contributions).await {
-            Ok(()) => Ok(true),
-            Err(error) => {
-                self.state = CoordinatorState::Bootstrapping {
-                    declarer,
-                    declared_count,
-                    contributions,
-                    retryable: true,
-                };
-                Err(error)
-            }
-        }
-    }
-
-    #[message]
-    pub async fn contribute_unseal(
-        &mut self,
-        operator_id: OperatorId,
-        passphrase: SafeCell<Vec<u8>>,
-    ) -> Result<bool, Error> {
-        if matches!(self.state, CoordinatorState::Idle) {
-            let threshold = {
-                let mut conn = self.db.get().await?;
-                custody::threshold(&mut conn).await?
-            };
-            self.state = CoordinatorState::Unsealing {
-                threshold,
-                contributions: Contributions::default(),
-                retryable: false,
-            };
-        }
-
-        let CoordinatorState::Unsealing {
-            threshold,
-            contributions,
-            retryable,
-        } = &mut self.state
-        else {
-            return Err(Error::AlreadyBootstrapping);
-        };
-
-        if contributions.contains(operator_id) && !*retryable {
-            return Err(Error::DuplicateContribution);
-        }
-        contributions.put(operator_id, passphrase);
-        *retryable = false;
-
-        if contributions.len() < *threshold {
-            return Ok(false);
-        }
-
-        let state = std::mem::replace(&mut self.state, CoordinatorState::Idle);
-        let CoordinatorState::Unsealing {
-            threshold,
-            mut contributions,
-            ..
-        } = state
-        else {
-            unreachable!("state was matched as Unsealing above")
-        };
-
-        match finalize_unseal(&self.db, &self.vault, threshold, &mut contributions).await {
-            Ok(()) => Ok(true),
-            Err(error) => {
-                self.state = CoordinatorState::Unsealing {
-                    threshold,
-                    contributions,
-                    retryable: true,
-                };
-                Err(error)
-            }
-        }
-    }
-}

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

@@ -61,11 +61,12 @@ mod tests {
     #[test]
     fn derive_seal_key_deterministic() {
         static PASSWORD: &[u8] = b"password";
-        let mut password = SafeCell::new(PASSWORD.to_vec());
+        let password = SafeCell::new(PASSWORD.to_vec());
+        let password2 = SafeCell::new(PASSWORD.to_vec());
         let salt = generate_salt();
 
-        let mut key1 = derive_key(&mut password, &salt);
-        let mut key2 = derive_key(&mut password, &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();
@@ -76,10 +77,10 @@ mod tests {
     #[test]
     fn successful_derive() {
         static PASSWORD: &[u8] = b"password";
-        let mut password = SafeCell::new(PASSWORD.to_vec());
+        let password = SafeCell::new(PASSWORD.to_vec());
         let salt = generate_salt();
 
-        let mut key = derive_key(&mut password, &salt);
+        let mut key = derive_key(password, &salt);
         let key_reader = key.0.read();
 
         assert_ne!(key_reader.as_slice(), &[0u8; 32][..]);

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

@@ -192,9 +192,7 @@ pub async fn verify_entity<E: Integrable>(
         Ok(false) => Err(Error::MacMismatch {
             entity_kind: E::KIND,
         }),
-        Err(SendError::HandlerError(
-            vault::Error::Sealed | vault::Error::KeyVersionMismatch { .. },
-        )) => Ok(AttestationStatus::Unavailable),
+        Err(SendError::HandlerError(vault::Error::Sealed)) => Ok(AttestationStatus::Unavailable),
         Err(_) => Err(Error::VaultSend),
     }
 }
@@ -215,9 +213,9 @@ mod tests {
             GlobalActors,
             vault::{Bootstrap, Vault},
         },
-        crypto::KeyCell,
         db::{self, schema},
     };
+    use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
 
     use super::{Error, Integrable, sign_entity, verify_entity};
     #[derive(Clone, arbiter_macros::Hashable)]
@@ -237,8 +235,7 @@ mod tests {
         );
         actor
             .ask(Bootstrap {
-                seal_key: KeyCell::from([0u8; 32]),
-                custody: None,
+                seal_key_raw: SafeCell::new(b"integrity-test-seal-key".to_vec()),
             })
             .await
             .unwrap();
@@ -334,47 +331,4 @@ mod tests {
             .unwrap_err();
         assert!(matches!(err, Error::MacMismatch { .. }));
     }
-
-    #[tokio::test]
-    async fn key_version_mismatch_returns_unavailable_not_mac_mismatch() {
-        use crate::db::schema::integrity_envelope;
-        use super::AttestationStatus;
-
-        const ENTITY_ID: &[u8] = b"entity-id-rotation-test";
-
-        let db = db::create_test_pool().await;
-        let vault = bootstrapped_vault(&db).await;
-        let mut conn = db.get().await.unwrap();
-
-        let entity = DummyEntity {
-            payload_version: 1,
-            payload: b"payload-v1".to_vec(),
-        };
-
-        sign_entity(&mut conn, &vault, &entity, ENTITY_ID)
-            .await
-            .unwrap();
-
-        // Simulate key rotation: update the stored key_version to a stale value.
-        // After real rotation the vault's root_key_history_id would advance, but
-        // here we achieve the same mismatch by back-dating the envelope's key_version.
-        diesel::update(integrity_envelope::table)
-            .filter(integrity_envelope::entity_kind.eq("dummy_entity"))
-            .filter(integrity_envelope::entity_id.eq(ENTITY_ID))
-            .set(integrity_envelope::key_version.eq(0))
-            .execute(&mut conn)
-            .await
-            .unwrap();
-
-        // Must NOT error — version mismatch is Unavailable, not tampered.
-        let status = verify_entity(&mut conn, &vault, &entity, ENTITY_ID)
-            .await
-            .expect("key version mismatch must not be treated as an error");
-
-        assert_eq!(
-            status,
-            AttestationStatus::Unavailable,
-            "stale key_version must yield Unavailable, not MacMismatch"
-        );
-    }
 }

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

@@ -1,5 +1,5 @@
 use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
-use encryption::v1::Nonce;
+use encryption::v1::{Nonce, Salt};
 
 use argon2::{Algorithm, Argon2};
 use chacha20poly1305::{
@@ -13,7 +13,6 @@ use rand::{
 
 pub mod encryption;
 pub mod integrity;
-pub mod shamir;
 
 pub struct KeyCell(pub SafeCell<Key>);
 impl From<SafeCell<Key>> for KeyCell {
@@ -21,16 +20,6 @@ impl From<SafeCell<Key>> for KeyCell {
         Self(value)
     }
 }
-
-impl From<[u8; 32]> for KeyCell {
-    fn from(bytes: [u8; 32]) -> Self {
-        let cell = SafeCell::new_inline(|key: &mut Key| {
-            key.copy_from_slice(&bytes);
-        });
-        Self(cell)
-    }
-}
-
 impl TryFrom<SafeCell<Vec<u8>>> for KeyCell {
     type Error = ();
 
@@ -39,7 +28,7 @@ impl TryFrom<SafeCell<Vec<u8>>> for KeyCell {
         if value.len() != size_of::<Key>() {
             return Err(());
         }
-        let cell = SafeCell::new_inline(|cell_write: &mut Key| {
+        let cell = SafeCell::new_inline_default(|cell_write: &mut Key| {
             cell_write.copy_from_slice(&value);
         });
         Ok(Self(cell))
@@ -48,7 +37,7 @@ impl TryFrom<SafeCell<Vec<u8>>> for KeyCell {
 
 impl KeyCell {
     pub fn new_secure_random() -> Self {
-        let key = SafeCell::new_inline(|key_buffer: &mut Key| {
+        let key = SafeCell::new_inline_default(|key_buffer: &mut Key| {
             let mut rng = StdRng::try_from_rng(&mut SysRng)
                 .expect("Rng failure is unrecoverable and should panic");
             rng.fill_bytes(key_buffer);
@@ -69,7 +58,6 @@ impl KeyCell {
         let buffer = buffer.as_mut();
         cipher.encrypt_in_place(nonce, associated_data, buffer)
     }
-
     pub fn decrypt_in_place(
         &mut self,
         nonce: &Nonce,
@@ -105,11 +93,8 @@ impl KeyCell {
     }
 }
 
-/// Derive a fixed-length key from a passphrase using Argon2id.
-///
-/// The passphrase is borrowed so that callers can keep it in protected memory
-/// and reuse it across retries instead of handing over a copy.
-pub fn derive_key(password: &mut SafeCell<Vec<u8>>, salt: &[u8]) -> KeyCell {
+/// Derive a fixed-length key from the password using Argon2id, which is designed for password hashing and key derivation.
+pub fn derive_key(password: &mut SafeCell<Vec<u8>>, salt: &Salt) -> KeyCell {
     let params = {
         #[cfg(debug_assertions)]
         {
@@ -147,11 +132,11 @@ mod tests {
     #[test]
     fn encrypt_decrypt() {
         static PASSWORD: &[u8] = b"password";
-        let mut password = SafeCell::new(PASSWORD.to_vec());
+        let password = SafeCell::new(PASSWORD.to_vec());
         let salt = generate_salt();
 
-        let mut key = derive_key(&mut password, &salt);
-        let nonce = Nonce(*b"unique nonce 123 1231233");
+        let mut key = derive_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();
 

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

@@ -1,221 +0,0 @@
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
-use rand_core::CryptoRng;
-use vsss_rs::Gf256;
-
-use crate::crypto::KeyCell;
-
-/// GF(256) addresses shares by a non-zero byte, so no committee can exceed 255.
-pub const MAX_COMMITTEE_SIZE: usize = 255;
-
-/// Errors returned by Shamir split/combine operations.
-#[derive(Debug, thiserror::Error)]
-pub enum ShamirError {
-    #[error("failed to split key: {0}")]
-    Split(String),
-    #[error("failed to combine shares: {0}")]
-    Combine(String),
-}
-
-/// Return the required threshold for a Shamir share pool of `committee_size`.
-///
-/// A pool of two is rejected: a majority of two is two, which gives each holder
-/// a veto over every unseal without giving either one recovery. That rejects no
-/// supported committee, because a two-operator vault must carry at least one
-/// recovery share and so never splits into a pool of two -- see
-/// `docs/ARCHITECTURE.md` 3.9.
-#[expect(
-    clippy::integer_division,
-    reason = "majority thresholds use integer arithmetic"
-)]
-#[must_use]
-pub const fn shamir_threshold(committee_size: usize) -> Option<usize> {
-    match committee_size {
-        0 | 2 => None,
-        size if size > MAX_COMMITTEE_SIZE => None,
-        1 => Some(1),
-        size => Some(size / 2 + 1),
-    }
-}
-
-/// Split a seal key into `total` shares, `threshold` of which reconstruct it.
-pub fn split_key(
-    threshold: usize,
-    total: usize,
-    key: &mut KeyCell,
-    rng: impl CryptoRng,
-) -> Result<Vec<SafeCell<Vec<u8>>>, ShamirError> {
-    if total == 0 || threshold == 0 || threshold > total || total == 2 || total > MAX_COMMITTEE_SIZE
-    {
-        return Err(ShamirError::Split(
-            "unsupported committee parameters".to_owned(),
-        ));
-    }
-
-    // Nothing to interpolate when one share suffices.
-    if threshold == 1 {
-        return Ok(key.0.read_inline(|key| {
-            std::iter::repeat_with(|| SafeCell::new(key.as_slice().to_vec()))
-                .take(total)
-                .collect()
-        }));
-    }
-
-    key.0.read_inline(|key| {
-        let key: &[u8; 32] = key
-            .as_slice()
-            .try_into()
-            .map_err(|_| ShamirError::Split("unexpected seal key length".to_owned()))?;
-
-        Gf256::split_array(threshold, total, key, rng)
-            .map(|shares| shares.into_iter().map(SafeCell::new).collect())
-            .map_err(|error| ShamirError::Split(format!("{error:?}")))
-    })
-}
-
-/// Combine shares back into the seal key.
-///
-/// `threshold` comes from storage rather than from the shapes of the shares:
-/// a one-of-one committee stores the key verbatim, and telling that apart by
-/// share length alone would misread any Shamir share that happened to be key
-/// sized.
-pub fn combine_shares(
-    threshold: usize,
-    shares: &mut [SafeCell<Vec<u8>>],
-) -> Result<KeyCell, ShamirError> {
-    if threshold == 0 {
-        return Err(ShamirError::Combine("threshold is zero".to_owned()));
-    }
-    if shares.len() < threshold {
-        return Err(ShamirError::Combine(
-            "not enough shares supplied".to_owned(),
-        ));
-    }
-
-    // Mirror of the one-of-one case in [`split_key`]: the share is the key.
-    if threshold == 1 {
-        let share = shares
-            .first_mut()
-            .ok_or_else(|| ShamirError::Combine("no shares supplied".to_owned()))?;
-        return reconstructed_key(share.read_inline(|share| SafeCell::new(share.clone())));
-    }
-
-    let mut gathered = SafeCell::new(Vec::with_capacity(shares.len()));
-    for share in shares.iter_mut() {
-        share.read_inline(|share| {
-            gathered.write_inline(|gathered| gathered.push(share.clone()));
-        });
-    }
-
-    let combined = gathered.read_inline(|gathered| {
-        Gf256::combine_array(gathered.as_slice())
-            .map(SafeCell::new)
-            .map_err(|error| ShamirError::Combine(format!("{error:?}")))
-    })?;
-
-    reconstructed_key(combined)
-}
-
-fn reconstructed_key(bytes: SafeCell<Vec<u8>>) -> Result<KeyCell, ShamirError> {
-    KeyCell::try_from(bytes)
-        .map_err(|()| ShamirError::Combine("unexpected reconstructed key length".to_owned()))
-}
-
-#[cfg(test)]
-mod tests {
-    use super::{MAX_COMMITTEE_SIZE, combine_shares, shamir_threshold, split_key};
-    use crate::crypto::KeyCell;
-    use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
-    use rand::rngs::SysRng;
-    use rand_core::UnwrapErr;
-    use rstest::rstest;
-
-    fn key_bytes(mut key: KeyCell) -> [u8; 32] {
-        key.0.read_inline(|key| {
-            let mut bytes = [0u8; 32];
-            bytes.copy_from_slice(key.as_slice());
-            bytes
-        })
-    }
-
-    fn select(shares: &mut [SafeCell<Vec<u8>>], indexes: &[usize]) -> Vec<SafeCell<Vec<u8>>> {
-        indexes
-            .iter()
-            .filter_map(|index| {
-                shares
-                    .get_mut(*index)
-                    .map(|share| share.read_inline(|share| SafeCell::new(share.clone())))
-            })
-            .collect()
-    }
-
-    #[rstest]
-    #[case(&[0, 1])]
-    #[case(&[0, 2])]
-    #[case(&[1, 2])]
-    fn threshold_shares_reconstruct_fixed_key(#[case] indexes: &[usize]) {
-        let expected = [9_u8; 32];
-        let mut key = KeyCell::from(expected);
-        let rng = UnwrapErr(SysRng);
-        let mut shares = split_key(2, 3, &mut key, rng).expect("split should succeed");
-        let mut selected = select(&mut shares, indexes);
-        let combined = combine_shares(2, &mut selected).expect("combine should succeed");
-        assert_eq!(key_bytes(combined), expected);
-    }
-
-    #[test]
-    fn one_of_one_round_trips_a_fixed_size_key() {
-        let expected = [7_u8; 32];
-        let mut key = KeyCell::from(expected);
-        let rng = UnwrapErr(SysRng);
-        let mut shares = split_key(1, 1, &mut key, rng).expect("split should succeed");
-        let combined = combine_shares(1, &mut shares).expect("combine should succeed");
-        assert_eq!(key_bytes(combined), expected);
-    }
-
-    #[test]
-    fn fewer_shares_than_threshold_is_rejected() {
-        let mut key = KeyCell::from([3_u8; 32]);
-        let rng = UnwrapErr(SysRng);
-        let mut shares = split_key(3, 5, &mut key, rng).expect("split should succeed");
-        let mut selected = select(&mut shares, &[0, 1]);
-        assert!(
-            combine_shares(3, &mut selected).is_err(),
-            "two of three shares must not reconstruct the key"
-        );
-    }
-
-    #[rstest]
-    #[case(0, None)]
-    #[case(1, Some(1))]
-    #[case(2, None)]
-    #[case(3, Some(2))]
-    #[case(4, Some(3))]
-    #[case(MAX_COMMITTEE_SIZE, Some(128))]
-    #[case(MAX_COMMITTEE_SIZE + 1, None)]
-    fn committee_threshold_is_a_majority(
-        #[case] committee_size: usize,
-        #[case] expected: Option<usize>,
-    ) {
-        assert_eq!(shamir_threshold(committee_size), expected);
-    }
-
-    #[test]
-    fn oversized_committee_is_rejected_by_split() {
-        let mut key = KeyCell::from([1_u8; 32]);
-        let rng = UnwrapErr(SysRng);
-        assert!(
-            split_key(129, MAX_COMMITTEE_SIZE + 1, &mut key, rng).is_err(),
-            "committees above the GF(256) share limit must be rejected"
-        );
-    }
-
-    #[test]
-    fn two_operator_committee_is_explicitly_unsupported() {
-        let mut key = KeyCell::from([7_u8; 32]);
-        let rng = UnwrapErr(SysRng);
-        assert!(
-            split_key(2, 2, &mut key, rng).is_err(),
-            "two-operator committees must be rejected"
-        );
-    }
-}

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

@@ -1,137 +0,0 @@
-//! Storage for Shamir custody material: the reconstruction threshold and the
-//! per-operator encrypted shares of the vault seal key.
-//!
-//! The queries live here so that the actors above hold no Diesel code of their
-//! own. Every one of them borrows the caller's connection instead of taking one
-//! from the pool, which is what lets the vault write custody material inside
-//! the same transaction that stores the root key.
-
-use std::collections::HashMap;
-
-use diesel::{ExpressionMethods as _, QueryDsl};
-use diesel_async::RunQueryDsl;
-
-use crate::db::{
-    self,
-    models::{OperatorId, SqliteTimestamp},
-    schema,
-};
-
-/// One Shamir share, encrypted under a key derived from its operator's passphrase.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct EncryptedShare {
-    pub ciphertext: Vec<u8>,
-    pub nonce: Vec<u8>,
-    pub salt: Vec<u8>,
-}
-
-/// Everything a bootstrap persists about custody, written as a single unit.
-#[derive(Debug)]
-pub struct CustodyRecord {
-    pub threshold: usize,
-    pub shares: Vec<(OperatorId, EncryptedShare)>,
-}
-
-#[derive(Debug, thiserror::Error)]
-pub enum Error {
-    #[error("Database query error: {0}")]
-    Query(#[from] diesel::result::Error),
-    #[error("Stored committee threshold is missing or out of range")]
-    BrokenThreshold,
-    #[error("Custody settings row is missing")]
-    MissingSettings,
-    #[error("No share stored for operator {0:?}")]
-    MissingShare(OperatorId),
-}
-
-/// Persist threshold and shares on the caller's connection, joining any
-/// transaction the caller has already opened.
-pub async fn write_record(
-    conn: &mut db::DatabaseConnection,
-    record: &CustodyRecord,
-) -> Result<(), Error> {
-    let threshold = i32::try_from(record.threshold).map_err(|_| Error::BrokenThreshold)?;
-
-    // SQLite has no batch form for REPLACE INTO in diesel, so the rows go
-    // in one at a time. The caller's transaction still makes them atomic.
-    let now = SqliteTimestamp::now();
-    for (operator_id, share) in &record.shares {
-        diesel::replace_into(schema::operator::table)
-            .values((
-                schema::operator::id.eq(Some(*operator_id)),
-                schema::operator::share.eq(&share.ciphertext),
-                schema::operator::share_nonce.eq(&share.nonce),
-                schema::operator::share_salt.eq(&share.salt),
-                schema::operator::created_at.eq(now.clone()),
-                schema::operator::updated_at.eq(now.clone()),
-            ))
-            .execute(&mut *conn)
-            .await?;
-    }
-
-    let updated = diesel::update(schema::arbiter_settings::table)
-        .set(schema::arbiter_settings::shamir_threshold.eq(Some(threshold)))
-        .execute(&mut *conn)
-        .await?;
-    if updated != 1 {
-        return Err(Error::MissingSettings);
-    }
-
-    Ok(())
-}
-
-/// Number of shares required to reconstruct the seal key.
-pub async fn threshold(conn: &mut db::DatabaseConnection) -> Result<usize, Error> {
-    let stored: Option<i32> = schema::arbiter_settings::table
-        .select(schema::arbiter_settings::shamir_threshold)
-        .first(conn)
-        .await?;
-
-    stored
-        .and_then(|value| usize::try_from(value).ok())
-        .filter(|threshold| *threshold > 0)
-        .ok_or(Error::BrokenThreshold)
-}
-
-/// Load the shares of `operators` in one query, in the order requested.
-pub async fn shares(
-    conn: &mut db::DatabaseConnection,
-    operators: &[OperatorId],
-) -> Result<Vec<EncryptedShare>, Error> {
-    /// (id, then the three columns that make up [`EncryptedShare`])
-    type ShareRow = (Option<OperatorId>, Vec<u8>, Vec<u8>, Vec<u8>);
-
-    let wanted: Vec<Option<OperatorId>> = operators.iter().copied().map(Some).collect();
-
-    let rows: Vec<ShareRow> = schema::operator::table
-        .filter(schema::operator::id.eq_any(wanted))
-        .select((
-            schema::operator::id,
-            schema::operator::share,
-            schema::operator::share_nonce,
-            schema::operator::share_salt,
-        ))
-        .load(conn)
-        .await?;
-
-    let mut found: HashMap<OperatorId, EncryptedShare> = rows
-        .into_iter()
-        .filter_map(|(id, ciphertext, nonce, salt)| {
-            id.map(|id| {
-                (
-                    id,
-                    EncryptedShare {
-                        ciphertext,
-                        nonce,
-                        salt,
-                    },
-                )
-            })
-        })
-        .collect();
-
-    operators
-        .iter()
-        .map(|id| found.remove(id).ok_or(Error::MissingShare(*id)))
-        .collect()
-}

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

@@ -8,7 +8,6 @@ use diesel_migrations::{EmbeddedMigrations, MigrationHarness, embed_migrations};
 use thiserror::Error;
 use tracing::info;
 
-pub mod custody;
 pub mod models;
 pub mod schema;
 
@@ -155,39 +154,3 @@ pub async fn create_test_pool() -> DatabasePool {
         .await
         .expect("Failed to create test database pool")
 }
-
-#[cfg(test)]
-mod tests {
-    use diesel::{ExpressionMethods as _, result::DatabaseErrorKind};
-    use diesel_async::RunQueryDsl as _;
-
-    use super::*;
-
-    #[tokio::test]
-    async fn operator_share_salt_must_be_supplied_by_application() {
-        let pool = create_test_pool().await;
-        let mut conn = pool.get().await.expect("pool connection");
-
-        let operator_id = diesel::insert_into(schema::operator_identity::table)
-            .values(schema::operator_identity::public_key.eq(vec![1]))
-            .returning(schema::operator_identity::id)
-            .get_result::<i32>(&mut conn)
-            .await
-            .expect("insert operator identity");
-
-        let error = diesel::insert_into(schema::operator::table)
-            .values((
-                schema::operator::id.eq(operator_id),
-                schema::operator::share.eq(vec![2]),
-                schema::operator::share_nonce.eq(vec![3]),
-            ))
-            .execute(&mut conn)
-            .await
-            .expect_err("operator insert without an application-generated salt must fail");
-
-        assert!(matches!(
-            error,
-            diesel::result::Error::DatabaseError(DatabaseErrorKind::NotNullViolation, _)
-        ));
-    }
-}

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

@@ -110,18 +110,6 @@ pub mod types {
                     ToSql::<Integer, Sqlite>::to_sql(&self.0, out)
                 }
             }
-
-            impl arbiter_crypto::hashing::Hashable for $name {
-                fn hash<H: arbiter_crypto::hashing::Digest>(&self, hasher: &mut H) {
-                    arbiter_crypto::hashing::Hashable::hash(&self.0, hasher);
-                }
-            }
-
-            impl crate::crypto::integrity::v1::IntoId for $name {
-                fn into_id(self) -> Vec<u8> {
-                    crate::crypto::integrity::v1::IntoId::into_id(self.0)
-                }
-            }
         };
     }
 
@@ -215,7 +203,6 @@ pub struct ArbiterSettings {
     pub id: i32,
     pub root_key_id: Option<i32>, // references root_key_history.id
     pub tls_id: Option<i32>,      // references tls_history.id
-    pub shamir_threshold: Option<i32>,
 }
 
 #[derive(Models, Queryable, Debug, Insertable, Selectable)]
@@ -298,7 +285,6 @@ pub struct Operator {
     pub id: OperatorId,
     pub share: Vec<u8>,
     pub share_nonce: Vec<u8>,
-    pub share_salt: Vec<u8>,
     pub created_at: SqliteTimestamp,
     pub updated_at: SqliteTimestamp,
 }

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

@@ -17,7 +17,6 @@ diesel::table! {
         id -> Integer,
         root_key_id -> Nullable<Integer>,
         tls_id -> Nullable<Integer>,
-        shamir_threshold -> Nullable<Integer>,
     }
 }
 
@@ -158,7 +157,6 @@ diesel::table! {
         id -> Nullable<Integer>,
         share -> Binary,
         share_nonce -> Binary,
-        share_salt -> Binary,
         created_at -> Integer,
         updated_at -> Integer,
     }

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

@@ -1,34 +1,28 @@
-use diesel_async::{AsyncConnection, RunQueryDsl};
-use kameo::actor::ActorRef;
-
 use crate::{
     actors::vault::Vault,
     crypto::integrity,
     db::{
         self, DatabaseError,
         models::{
-            EvmBasicGrant, EvmEtherTransferGrant, EvmEtherTransferGrantTarget,
-            EvmEtherTransferLimit, EvmTokenTransferGrant, EvmTokenTransferVolumeLimit,
-            EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
+            EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
         },
         schema::{self, evm_transaction_log},
     },
     evm::policies::{
         CombinedSettings, DatabaseID, EvalContext, EvalViolation, Grant, Policy,
-        SharedGrantSettings, SpecificGrant, SpecificMeaning, VolumeRateLimit,
-        ether_transfer::EtherTransfer, token_transfers::TokenTransfer,
+        SharedGrantSettings, SpecificGrant, SpecificMeaning, ether_transfer::EtherTransfer,
+        token_transfers::TokenTransfer,
     },
 };
 
 use alloy::{
     consensus::TxEip1559,
-    primitives::{Address, TxKind, U256},
+    primitives::{TxKind, U256},
 };
 use chrono::Utc;
-use diesel::{
-    ExpressionMethods as _, OptionalExtension, QueryDsl as _, QueryResult, SelectableHelper,
-    insert_into, sqlite::Sqlite, update,
-};
+use diesel::{ExpressionMethods as _, QueryDsl as _, QueryResult, insert_into, sqlite::Sqlite};
+use diesel_async::{AsyncConnection, RunQueryDsl};
+use kameo::actor::ActorRef;
 
 pub mod abi;
 pub mod safe_signer;
@@ -278,151 +272,6 @@ impl Engine {
         Ok(id)
     }
 
-    pub async fn revoke_grant(
-        &self,
-        basic_grant_id: i32,
-    ) -> Result<(), DatabaseError> {
-        let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
-        let vault = self.vault.clone();
-
-        conn.transaction(async move |conn| {
-            use crate::db::schema::{
-                evm_basic_grant, evm_ether_transfer_grant, evm_ether_transfer_grant_target,
-                evm_ether_transfer_limit, evm_token_transfer_grant,
-                evm_token_transfer_volume_limit,
-            };
-
-            update(evm_basic_grant::table)
-                .filter(evm_basic_grant::id.eq(basic_grant_id))
-                .set(evm_basic_grant::revoked_at.eq(SqliteTimestamp(Utc::now())))
-                .execute(&mut *conn)
-                .await?;
-
-            let basic_grant: EvmBasicGrant = evm_basic_grant::table
-                .filter(evm_basic_grant::id.eq(basic_grant_id))
-                .select(EvmBasicGrant::as_select())
-                .first(&mut *conn)
-                .await?;
-
-            let shared = SharedGrantSettings::try_from_model(basic_grant)?;
-
-            if let Some(ether_grant) = evm_ether_transfer_grant::table
-                .filter(evm_ether_transfer_grant::basic_grant_id.eq(basic_grant_id))
-                .select(EvmEtherTransferGrant::as_select())
-                .first(&mut *conn)
-                .await
-                .optional()?
-            {
-                let target_rows: Vec<EvmEtherTransferGrantTarget> =
-                    evm_ether_transfer_grant_target::table
-                        .filter(evm_ether_transfer_grant_target::grant_id.eq(ether_grant.id))
-                        .select(EvmEtherTransferGrantTarget::as_select())
-                        .load(&mut *conn)
-                        .await?;
-                let targets: Vec<Address> = target_rows
-                    .into_iter()
-                    .filter_map(|target| {
-                        let arr: [u8; 20] = target.address.try_into().ok()?;
-                        Some(Address::from(arr))
-                    })
-                    .collect();
-
-                let limit: EvmEtherTransferLimit = evm_ether_transfer_limit::table
-                    .filter(evm_ether_transfer_limit::id.eq(ether_grant.limit_id))
-                    .select(EvmEtherTransferLimit::as_select())
-                    .first(&mut *conn)
-                    .await?;
-
-                let settings = CombinedSettings {
-                    shared: shared.clone(),
-                    specific: policies::ether_transfer::Settings {
-                        target: targets,
-                        limit: VolumeRateLimit {
-                            max_volume: utils::try_bytes_to_u256(&limit.max_volume).map_err(
-                                |err| {
-                                    diesel::result::Error::DeserializationError(Box::new(err))
-                                },
-                            )?,
-                            window: chrono::Duration::seconds(limit.window_secs.into()),
-                        },
-                    },
-                };
-
-                integrity::sign_entity(&mut *conn, &vault, &settings, basic_grant_id)
-                    .await
-                    .map_err(|_| diesel::result::Error::RollbackTransaction)?;
-
-                return QueryResult::Ok(());
-            }
-
-            if let Some(token_grant) = evm_token_transfer_grant::table
-                .filter(evm_token_transfer_grant::basic_grant_id.eq(basic_grant_id))
-                .select(EvmTokenTransferGrant::as_select())
-                .first(&mut *conn)
-                .await
-                .optional()?
-            {
-                let volume_limit_rows: Vec<EvmTokenTransferVolumeLimit> =
-                    evm_token_transfer_volume_limit::table
-                        .filter(evm_token_transfer_volume_limit::grant_id.eq(token_grant.id))
-                        .select(EvmTokenTransferVolumeLimit::as_select())
-                        .load(&mut *conn)
-                        .await?;
-                let volume_limits: Vec<VolumeRateLimit> = volume_limit_rows
-                    .into_iter()
-                    .map(|row| {
-                        Ok(VolumeRateLimit {
-                            max_volume: utils::try_bytes_to_u256(&row.max_volume).map_err(
-                                |err| {
-                                    diesel::result::Error::DeserializationError(Box::new(err))
-                                },
-                            )?,
-                            window: chrono::Duration::seconds(row.window_secs.into()),
-                        })
-                    })
-                    .collect::<QueryResult<Vec<_>>>()?;
-
-                let target: Option<Address> = match token_grant.receiver {
-                    None => None,
-                    Some(bytes) => {
-                        let arr: [u8; 20] = bytes.try_into().map_err(|_| {
-                            diesel::result::Error::DeserializationError(
-                                "Invalid receiver address length".into(),
-                            )
-                        })?;
-                        Some(Address::from(arr))
-                    }
-                };
-
-                let token_contract: [u8; 20] =
-                    token_grant.token_contract.clone().try_into().map_err(|_| {
-                        diesel::result::Error::DeserializationError(
-                            "Invalid token contract address length".into(),
-                        )
-                    })?;
-
-                let settings = CombinedSettings {
-                    shared,
-                    specific: policies::token_transfers::Settings {
-                        token_contract: Address::from(token_contract),
-                        target,
-                        volume_limits,
-                    },
-                };
-
-                integrity::sign_entity(&mut *conn, &vault, &settings, basic_grant_id)
-                    .await
-                    .map_err(|_| diesel::result::Error::RollbackTransaction)?;
-
-                return QueryResult::Ok(());
-            }
-
-            Err(diesel::result::Error::NotFound)
-        })
-        .await
-        .map_err(DatabaseError::from)
-    }
-
     async fn list_one_kind<Kind: Policy, Y>(
         &self,
         conn: &mut impl AsyncConnection<Backend = Sqlite>,
@@ -505,12 +354,8 @@ mod tests {
     use chrono::{Duration, Utc};
     use diesel::{SelectableHelper, insert_into};
     use diesel_async::RunQueryDsl;
-    use kameo::{actor::ActorRef, prelude::Spawn};
     use rstest::rstest;
 
-    use crate::actors::{GlobalActors, vault::{Bootstrap, Vault}};
-    use crate::crypto::KeyCell;
-    use crate::crypto::integrity;
     use crate::db::{
         self, DatabaseConnection,
         models::{
@@ -519,10 +364,8 @@ mod tests {
         },
         schema::{evm_basic_grant, evm_transaction_log},
     };
-    use crate::evm::policies::ether_transfer::EtherTransfer;
     use crate::evm::policies::{
-        CombinedSettings, EvalContext, EvalViolation, Policy, SharedGrantSettings,
-        TransactionRateLimit, VolumeRateLimit,
+        EvalContext, EvalViolation, SharedGrantSettings, TransactionRateLimit,
     };
 
     use super::check_shared_constraints;
@@ -554,7 +397,6 @@ mod tests {
             chain: CHAIN_ID,
             valid_from: None,
             valid_until: None,
-            revoked_at: None,
             max_gas_fee_per_gas: None,
             max_priority_fee_per_gas: None,
             rate_limit: None,
@@ -763,116 +605,4 @@ mod tests {
             assert!(violations.is_empty());
         }
     }
-
-    async fn bootstrapped_vault(db: &db::DatabasePool) -> ActorRef<Vault> {
-        let actor = Vault::spawn(
-            Vault::new(db.clone(), GlobalActors::spawn_message_bus())
-                .await
-                .unwrap(),
-        );
-        actor
-            .ask(Bootstrap {
-                seal_key: KeyCell::from([0u8; 32]),
-                custody: None,
-            })
-            .await
-            .unwrap();
-        actor
-    }
-
-    #[tokio::test]
-    async fn revoke_grant_preserves_revoked_integrity() {
-        use crate::db::schema::evm_basic_grant;
-        use diesel::ExpressionMethods as _;
-
-        let db = db::create_test_pool().await;
-        let vault = bootstrapped_vault(&db).await;
-        let engine = super::Engine::new(db.clone(), vault.clone());
-
-        let full_grant = CombinedSettings {
-            shared: SharedGrantSettings {
-                wallet_access_id: WALLET_ACCESS_ID,
-                chain: CHAIN_ID,
-                valid_from: None,
-                valid_until: None,
-                revoked_at: None,
-                max_gas_fee_per_gas: None,
-                max_priority_fee_per_gas: None,
-                rate_limit: None,
-            },
-            specific: super::policies::ether_transfer::Settings {
-                target: vec![RECIPIENT],
-                limit: VolumeRateLimit {
-                    max_volume: U256::from(100u64),
-                    window: Duration::hours(1),
-                },
-            },
-        };
-
-        let grant_id = engine
-            .create_grant::<EtherTransfer>(full_grant)
-            .await
-            .unwrap();
-
-        engine.revoke_grant(grant_id).await.unwrap();
-
-        let mut conn = db.get().await.unwrap();
-        diesel::update(evm_basic_grant::table)
-            .filter(evm_basic_grant::id.eq(grant_id))
-            .set(evm_basic_grant::revoked_at.eq::<Option<SqliteTimestamp>>(None))
-            .execute(&mut conn)
-            .await
-            .unwrap();
-
-        let wallet_access = EvmWalletAccess {
-            id: WALLET_ACCESS_ID,
-            wallet_id: EvmWalletId::from_raw(10),
-            client_id: 20,
-            created_at: SqliteTimestamp(Utc::now()),
-        };
-        let context = EvalContext {
-            target: wallet_access,
-            chain: CHAIN_ID,
-            to: RECIPIENT,
-            value: U256::ONE,
-            calldata: Bytes::new(),
-            max_fee_per_gas: 1,
-            max_priority_fee_per_gas: 1,
-        };
-
-        let grant = EtherTransfer::try_find_grant(
-            &context, &mut conn,
-        )
-        .await
-        .unwrap()
-        .unwrap();
-
-        let result =
-            integrity::verify_entity(&mut conn, &vault, &grant.settings, grant.id).await;
-
-        assert!(matches!(
-            result,
-            Err(integrity::Error::MacMismatch { .. })
-        ));
-    }
-
-    #[test]
-    fn shared_settings_hash_changes_when_revoked_at_changes() {
-        use arbiter_crypto::hashing::Hashable;
-        use sha2::Digest;
-
-        let active = shared_settings();
-        let revoked = SharedGrantSettings {
-            revoked_at: Some(Utc::now()),
-            ..shared_settings()
-        };
-
-        let mut active_hash = sha2::Sha256::new();
-        active.hash(&mut active_hash);
-
-        let mut revoked_hash = sha2::Sha256::new();
-        revoked.hash(&mut revoked_hash);
-
-        assert_ne!(active_hash.finalize(), revoked_hash.finalize());
-    }
 }

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

@@ -144,7 +144,6 @@ pub struct SharedGrantSettings {
 
     pub valid_from: Option<DateTime<Utc>>,
     pub valid_until: Option<DateTime<Utc>>,
-    pub revoked_at: Option<DateTime<Utc>>,
 
     pub max_gas_fee_per_gas: Option<U256>,
     pub max_priority_fee_per_gas: Option<U256>,
@@ -159,7 +158,6 @@ impl SharedGrantSettings {
             chain: model.chain_id.into(),
             valid_from: model.valid_from.map(Into::into),
             valid_until: model.valid_until.map(Into::into),
-            revoked_at: model.revoked_at.map(Into::into),
             max_gas_fee_per_gas: model
                 .max_gas_fee_per_gas
                 .map(|b| utils::try_bytes_to_u256(&b))

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

@@ -80,7 +80,6 @@ fn shared() -> SharedGrantSettings {
         chain: CHAIN_ID,
         valid_from: None,
         valid_until: None,
-        revoked_at: None,
         max_gas_fee_per_gas: None,
         max_priority_fee_per_gas: None,
         rate_limit: None,

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

@@ -98,7 +98,6 @@ fn shared() -> SharedGrantSettings {
         chain: CHAIN_ID,
         valid_from: None,
         valid_until: None,
-        revoked_at: None,
         max_gas_fee_per_gas: None,
         max_priority_fee_per_gas: None,
         rate_limit: None,

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

@@ -44,7 +44,7 @@ impl std::fmt::Debug for SafeSigner {
 /// Returns the protected key bytes and the derived Ethereum address.
 pub fn generate(rng: &mut impl rand::Rng) -> (SafeCell<[u8; 32]>, Address) {
     loop {
-        let mut cell = SafeCell::new_inline(|w: &mut [u8; 32]| {
+        let mut cell = SafeCell::new_inline_default(|w: &mut [u8; 32]| {
             rng.fill_bytes(w);
         });
 

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

@@ -200,7 +200,7 @@ impl Convert for auth::Outbound {
                         .timestamp
                         .timestamp_nanos_opt()
                         .expect("timestamp within range")
-                        .cast_unsigned(),
+                        as u64,
                     random: challenge.nonce.to_vec(),
                 })
             }

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

@@ -31,6 +31,7 @@ pub(super) async fn dispatch(
         VaultRequestPayload::QueryState(()) => {
             let state = match actor.ask(HandleQueryVaultState {}).await {
                 Ok(VaultState::Unbootstrapped) => ProtoVaultState::Unbootstrapped,
+                Ok(VaultState::Bootstrapping) => ProtoVaultState::Boostrapping,
                 Ok(VaultState::Sealed) => ProtoVaultState::Sealed,
                 Ok(VaultState::Unsealed) => ProtoVaultState::Unsealed,
                 Err(SendError::HandlerError(Error::Internal)) => ProtoVaultState::Error,

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

@@ -1,10 +1,11 @@
 use crate::{
     grpc::request_tracker::RequestTracker,
-    peers::operator::{OperatorConnection, OperatorSession, OutOfBand},
+    peers::operator::{OutOfBand, OperatorConnection, OperatorSession},
 };
 use arbiter_proto::{
     proto::operator::{
-        OperatorRequest, OperatorResponse, operator_request::Payload as OperatorRequestPayload,
+        OperatorRequest, OperatorResponse,
+        operator_request::Payload as OperatorRequestPayload,
         operator_response::Payload as OperatorResponsePayload,
     },
     transport::{Error as TransportError, Receiver, Sender, grpc::GrpcBi},
@@ -110,9 +111,6 @@ async fn dispatch_inner(
         OperatorRequestPayload::Vault(req) => vault::dispatch(actor, req).await,
         OperatorRequestPayload::Evm(req) => evm::dispatch(actor, req).await,
         OperatorRequestPayload::SdkClient(req) => sdk_client::dispatch(actor, req).await,
-        OperatorRequestPayload::Governance(_) => {
-            Err(Status::permission_denied(stringify!(Governance)))
-        }
         OperatorRequestPayload::Auth(..) => {
             warn!("Unsupported post-auth operator auth request");
             Err(Status::invalid_argument("Unsupported operator request"))

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

@@ -80,7 +80,7 @@ impl Sender<Result<auth::Outbound, auth::Error>> for AuthTransportAdapter<'_> {
                         .timestamp
                         .timestamp_nanos_opt()
                         .expect("timestamp within range")
-                        .cast_unsigned(),
+                        as u64,
                     random: challenge.nonce.to_vec(),
                 })
             }
@@ -171,7 +171,7 @@ impl Receiver<auth::Inbound> for AuthTransportAdapter<'_> {
 
                 Some(auth::Inbound::AuthChallengeRequest {
                     pubkey,
-                    bootstrap_token: bootstrap_token.map(String::into_bytes),
+                    bootstrap_token,
                 })
             }
             AuthRequestPayload::ChallengeSolution(ProtoAuthChallengeSolution { signature }) => {

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

@@ -217,11 +217,6 @@ async fn handle_sign_transaction(
                 result: Some(vet_error.convert()),
             }
         }
-        Err(kameo::error::SendError::HandlerError(
-            SessionSignTransactionError::ClientNotConnected,
-        )) => {
-            return Err(Status::permission_denied("client not connected"));
-        }
         Err(kameo::error::SendError::HandlerError(SessionSignTransactionError::Internal)) => {
             EvmSignTransactionResponse {
                 result: Some(EvmSignTransactionResult::Error(

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

@@ -86,7 +86,6 @@ impl TryConvert for ProtoSharedSettings {
                 .valid_until
                 .map(ProtoTimestamp::try_convert)
                 .transpose()?,
-            revoked_at: None,
             max_gas_fee_per_gas: self
                 .max_gas_fee_per_gas
                 .as_deref()

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

@@ -33,11 +33,11 @@ pub(super) async fn dispatch(
 
     match payload {
         VaultRequestPayload::QueryState(()) => handle_query_vault_state(actor).await,
-        VaultRequestPayload::Unseal(_)
-        | VaultRequestPayload::Bootstrap(_)
-        | VaultRequestPayload::Rekey(_) => Err(Status::permission_denied(
-            "Vault is already unsealed; unseal/bootstrap not permitted in session",
-        )),
+        VaultRequestPayload::Unseal(_) | VaultRequestPayload::Bootstrap(_) => {
+            Err(Status::permission_denied(
+                "Vault is already unsealed; unseal/bootstrap not permitted in session",
+            ))
+        }
     }
 }
 
@@ -47,6 +47,7 @@ async fn handle_query_vault_state(
     let state = match actor.ask(HandleQueryVaultState {}).await {
         Ok(VaultState::Unbootstrapped) => ProtoVaultState::Unbootstrapped,
         Ok(VaultState::Sealed) => ProtoVaultState::Sealed,
+        Ok(VaultState::Bootstrapping) => ProtoVaultState::Boostrapping,
         Ok(VaultState::Unsealed) => ProtoVaultState::Unsealed,
         Err(err) => {
             warn!(error = ?err, "Failed to query vault state");

server/crates/arbiter-server/src/grpc/operator/vault_gate/inbound.rs

@@ -1,17 +1,14 @@
 use crate::{
-    crypto::shamir,
     grpc::{Convert, TryConvert},
     peers::operator::vault_gate::{
-        self as vault_gate, HandleBootstrapEncryptedKey, HandleContributeBootstrapPassphrase,
-        HandleContributeUnsealPassphrase, HandleDeclareCommittee, HandleHandshake,
-        HandleUnsealEncryptedKey,
+        self as vault_gate, HandleBootstrapEncryptedKey, HandleHandshake, HandleUnsealEncryptedKey,
     },
 };
 use arbiter_proto::proto::operator::{
     operator_request::Payload as OperatorRequestPayload,
     vault::{
         self as proto_vault,
-        bootstrap::{self as proto_bootstrap, request::Payload as BootstrapRequestPayload},
+        bootstrap::{self as proto_bootstrap},
         request::Payload as VaultRequestPayload,
         unseal::{self as proto_unseal, request::Payload as UnsealRequestPayload},
     },
@@ -53,7 +50,6 @@ impl TryConvert for VaultRequestPayload {
             Self::QueryState(()) => Ok(vault_gate::Inbound::HandleVaultState),
             Self::Unseal(req) => req.try_convert(),
             Self::Bootstrap(req) => req.try_convert(),
-            Self::Rekey(_) => Err(Status::unimplemented("Vault re-key is not available")),
         }
     }
 }
@@ -77,16 +73,6 @@ impl TryConvert for UnsealRequestPayload {
         match self {
             Self::Start(start) => start.try_convert(),
             Self::EncryptedKey(key) => Ok(key.convert()),
-            Self::ContributePassphrase(passphrase) => {
-                Ok(vault_gate::Inbound::HandleContributeUnsealPassphrase(
-                    HandleContributeUnsealPassphrase {
-                        passphrase: passphrase.passphrase,
-                    },
-                ))
-            }
-            Self::ContributeRecoveryPassphrase(_) => Err(Status::unimplemented(
-                "Recovery operator contributions are not available",
-            )),
         }
     }
 }
@@ -121,52 +107,12 @@ impl TryConvert for proto_bootstrap::Request {
     type Error = Status;
 
     fn try_convert(self) -> Result<vault_gate::Inbound, Status> {
-        self.payload
-            .ok_or_else(|| Status::invalid_argument("Missing bootstrap payload"))?
+        self.encrypted_key
+            .ok_or_else(|| Status::invalid_argument("Missing bootstrap encrypted key"))?
             .try_convert()
     }
 }
 
-impl TryConvert for BootstrapRequestPayload {
-    type Output = vault_gate::Inbound;
-    type Error = Status;
-
-    fn try_convert(self) -> Result<vault_gate::Inbound, Status> {
-        match self {
-            Self::EncryptedKey(key) => key.try_convert(),
-            Self::DeclareCommittee(dc) => {
-                if dc.recovery_count != 0 {
-                    return Err(Status::unimplemented(
-                        "Recovery operator contributions are not available",
-                    ));
-                }
-                let count = usize::try_from(dc.count)
-                    .ok()
-                    .filter(|count| *count <= shamir::MAX_COMMITTEE_SIZE)
-                    .ok_or_else(|| {
-                        Status::invalid_argument(format!(
-                            "Committee count must not exceed {}",
-                            shamir::MAX_COMMITTEE_SIZE
-                        ))
-                    })?;
-                Ok(vault_gate::Inbound::HandleDeclareCommittee(
-                    HandleDeclareCommittee { count },
-                ))
-            }
-            Self::ContributePassphrase(cp) => {
-                Ok(vault_gate::Inbound::HandleContributeBootstrapPassphrase(
-                    HandleContributeBootstrapPassphrase {
-                        passphrase: cp.passphrase,
-                    },
-                ))
-            }
-            Self::ContributeRecoveryPassphrase(_) => Err(Status::unimplemented(
-                "Recovery operator contributions are not available",
-            )),
-        }
-    }
-}
-
 impl TryConvert for proto_bootstrap::BootstrapEncryptedKey {
     type Output = vault_gate::Inbound;
     type Error = Status;

server/crates/arbiter-server/src/grpc/operator/vault_gate/outbound.rs

@@ -1,5 +1,5 @@
 use crate::{
-    actors::{vault::VaultState, vault_coordinator},
+    actors::vault::VaultState,
     grpc::{Convert, TryConvert},
     peers::operator::vault_gate::{self as vault_gate},
 };
@@ -34,26 +34,6 @@ const fn wrap_unseal_response(payload: UnsealResponsePayload) -> OperatorRespons
     }))
 }
 
-/// Ceremony errors are the operator's own doing far more often than ours, so
-/// they travel back as a specific status instead of a blanket internal error.
-fn ceremony_status(error: &vault_coordinator::Error) -> Status {
-    match error {
-        vault_coordinator::Error::AlreadyBootstrapping
-        | vault_coordinator::Error::AlreadyUnsealing
-        | vault_coordinator::Error::NotBootstrapping
-        | vault_coordinator::Error::DuplicateContribution => {
-            Status::failed_precondition(error.to_string())
-        }
-        vault_coordinator::Error::EmptyCommittee
-        | vault_coordinator::Error::UnsupportedCommittee
-        | vault_coordinator::Error::CommitteeTooLarge => {
-            Status::invalid_argument(error.to_string())
-        }
-        vault_coordinator::Error::InvalidPassphrase => Status::unauthenticated(error.to_string()),
-        _ => Status::internal("Vault ceremony failed"),
-    }
-}
-
 fn wrap_bootstrap_response(result: ProtoBootstrapResult) -> OperatorResponsePayload {
     wrap_vault_response(VaultResponsePayload::Bootstrap(proto_bootstrap::Response {
         result: result.into(),
@@ -66,6 +46,7 @@ impl Convert for VaultState {
     fn convert(self) -> OperatorResponsePayload {
         let proto_state = match self {
             Self::Unbootstrapped => ProtoVaultState::Unbootstrapped,
+            Self::Bootstrapping => ProtoVaultState::Boostrapping,
             Self::Sealed => ProtoVaultState::Sealed,
             Self::Unsealed => ProtoVaultState::Unsealed,
         };
@@ -130,56 +111,6 @@ impl TryConvert for vault_gate::Outbound {
                 };
                 Ok(wrap_bootstrap_response(proto_result))
             }
-            Self::HandleDeclareCommittee(result) => {
-                let proto_result = match result {
-                    Ok(()) => ProtoBootstrapResult::AwaitingContributions,
-                    Err(vault_gate::Error::Ceremony(
-                        vault_coordinator::Error::AlreadyBootstrapped,
-                    )) => ProtoBootstrapResult::AlreadyBootstrapped,
-                    Err(vault_gate::Error::Ceremony(err)) => {
-                        warn!(?err, "declare committee failed");
-                        return Err(ceremony_status(&err));
-                    }
-                    Err(err) => {
-                        warn!(?err, "declare committee failed");
-                        return Err(Status::internal("Failed to declare committee"));
-                    }
-                };
-                Ok(wrap_bootstrap_response(proto_result))
-            }
-            Self::HandleContributeBootstrapPassphrase(result) => {
-                let proto_result = match result {
-                    Ok(true) => ProtoBootstrapResult::Success,
-                    Ok(false) => ProtoBootstrapResult::AwaitingContributions,
-                    Err(vault_gate::Error::Ceremony(
-                        vault_coordinator::Error::AlreadyBootstrapped,
-                    )) => ProtoBootstrapResult::AlreadyBootstrapped,
-                    Err(vault_gate::Error::Ceremony(err)) => {
-                        warn!(?err, "contribute bootstrap passphrase failed");
-                        return Err(ceremony_status(&err));
-                    }
-                    Err(err) => {
-                        warn!(?err, "contribute bootstrap passphrase failed");
-                        return Err(Status::internal(
-                            "Failed to contribute bootstrap passphrase",
-                        ));
-                    }
-                };
-                Ok(wrap_bootstrap_response(proto_result))
-            }
-            Self::HandleContributeUnsealPassphrase(result) => {
-                let proto_result = match result {
-                    Ok(true) => ProtoUnsealResult::Success,
-                    Ok(false) => ProtoUnsealResult::AwaitingContributions,
-                    Err(err) => {
-                        warn!(?err, "contribute unseal passphrase failed");
-                        return Err(Status::internal("Failed to contribute unseal passphrase"));
-                    }
-                };
-                Ok(wrap_unseal_response(UnsealResponsePayload::Result(
-                    proto_result.into(),
-                )))
-            }
         }
     }
 }

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

@@ -8,7 +8,7 @@ use crate::{
     crypto::integrity::{self, AttestationStatus},
     db::{
         self,
-        models::ProgramClientMetadata,
+        models::{ProgramClientMetadata, SqliteTimestamp},
         schema::program_client,
     },
 };
@@ -18,13 +18,14 @@ use arbiter_proto::{
     transport::{Bi, expect_message},
 };
 
+use chrono::Utc;
 use diesel::{
     ExpressionMethods as _, OptionalExtension as _, QueryDsl as _, SelectableHelper as _,
-    dsl::insert_into,
+    dsl::insert_into, update,
 };
 use diesel_async::RunQueryDsl as _;
 use kameo::{actor::ActorRef, error::SendError};
-use tracing::{error, warn};
+use tracing::error;
 
 #[derive(thiserror::Error, Debug, Clone, PartialEq, Eq)]
 pub enum Error {
@@ -210,47 +211,71 @@ async fn insert_client(
     .await
 }
 
-/// Compares stored metadata against what a reconnecting client presents.
-/// Metadata is frozen after initial operator approval and must not be silently
-/// overwritten. Doing so would let an approved client forge its displayed
-/// identity in later approval prompts. Drift is logged and ignored.
-async fn check_metadata_drift(
+async fn sync_client_metadata(
     db: &db::DatabasePool,
     client_id: i32,
-    presented: &ClientMetadata,
+    metadata: &ClientMetadata,
 ) -> Result<(), Error> {
-    use crate::db::schema::client_metadata;
+    use crate::db::schema::{client_metadata, client_metadata_history};
+
+    let now = SqliteTimestamp(Utc::now());
 
     let mut conn = db.get().await.map_err(|e| {
         error!(error = ?e, "Database pool error");
         Error::DatabasePoolUnavailable
     })?;
 
-    let current: ProgramClientMetadata = program_client::table
-        .find(client_id)
-        .inner_join(client_metadata::table)
-        .select(ProgramClientMetadata::as_select())
-        .first(&mut conn)
-        .await
-        .map_err(|e| {
-            error!(error = ?e, "Database error");
-            Error::DatabaseOperationFailed
-        })?;
+    conn.exclusive_transaction(async |conn| {
+        let (current_metadata_id, current): (i32, ProgramClientMetadata) = program_client::table
+            .find(client_id)
+            .inner_join(client_metadata::table)
+            .select((
+                program_client::metadata_id,
+                ProgramClientMetadata::as_select(),
+            ))
+            .first(&mut *conn)
+            .await?;
 
-    let changed = current.name != presented.name
-        || current.description != presented.description
-        || current.version != presented.version;
+        let unchanged = current.name == metadata.name
+            && current.description == metadata.description
+            && current.version == metadata.version;
+        if unchanged {
+            return Ok(());
+        }
 
-    if changed {
-        warn!(
-            client_id,
-            stored_name = %current.name,
-            presented_name = %presented.name,
-            "reconnecting client presented different metadata; ignoring - metadata is frozen after operator approval"
-        );
-    }
+        insert_into(client_metadata_history::table)
+            .values((
+                client_metadata_history::metadata_id.eq(current_metadata_id),
+                client_metadata_history::client_id.eq(client_id),
+            ))
+            .execute(&mut *conn)
+            .await?;
 
-    Ok(())
+        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>(&mut *conn)
+            .await?;
+
+        update(program_client::table.find(client_id))
+            .set((
+                program_client::metadata_id.eq(metadata_id),
+                program_client::updated_at.eq(now),
+            ))
+            .execute(&mut *conn)
+            .await?;
+
+        Ok::<(), diesel::result::Error>(())
+    })
+    .await
+    .map_err(|e| {
+        error!(error = ?e, "Database error");
+        Error::DatabaseOperationFailed
+    })
 }
 
 async fn challenge_client<T>(
@@ -273,7 +298,7 @@ where
 
     let signature = expect_message(transport, |req: Inbound| match req {
         Inbound::AuthChallengeSolution { signature } => Some(signature),
-        Inbound::AuthChallengeRequest { .. } => None,
+        _ => None,
     })
     .await
     .map_err(|e| {
@@ -299,7 +324,6 @@ where
 
     let client_id = if let Some(id) = get_client_id(&props.db, &pubkey).await? {
         verify_integrity(&props.db, &props.actors.vault, &pubkey).await?;
-        check_metadata_drift(&props.db, id, &metadata).await?;
         id
     } else {
         approve_new_client(
@@ -313,6 +337,8 @@ where
         insert_client(&props.db, &props.actors.vault, &pubkey, &metadata).await?
     };
 
+    sync_client_metadata(&props.db, client_id, &metadata).await?;
+
     let challenge = AuthChallenge::generate(&mut rand::rng());
     challenge_client(transport, pubkey, challenge).await?;
 

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

@@ -83,7 +83,7 @@ impl Actor for ClientSession {
         args.props
             .actors
             .flow_coordinator
-            .ask(RegisterClient { client_id: args.client_id, actor: this })
+            .ask(RegisterClient { actor: this })
             .await
             .map_err(|_| Error::ConnectionRegistrationFailed)?;
         Ok(args)

server/crates/arbiter-server/src/peers/operator/auth/mod.rs

@@ -14,7 +14,7 @@ mod state;
 pub enum Inbound {
     AuthChallengeRequest {
         pubkey: authn::PublicKey,
-        bootstrap_token: Option<Vec<u8>>,
+        bootstrap_token: Option<String>,
     },
     AuthChallengeSolution {
         signature: Vec<u8>,

server/crates/arbiter-server/src/peers/operator/auth/state.rs

@@ -3,8 +3,8 @@ use super::{
     Error,
 };
 use crate::{
-    actors::bootstrap::VerifyToken,
-    db::{DatabasePool, models::OperatorId, schema::operator_identity},
+    actors::bootstrap::ConsumeToken,
+    db::{DatabasePool, schema::operator_identity},
     peers::operator::auth::Outbound,
 };
 use arbiter_crypto::authn::{self, AuthChallenge, OPERATOR_CONTEXT};
@@ -16,12 +16,13 @@ use tracing::error;
 
 pub(super) struct ChallengeRequest {
     pub(super) pubkey: authn::PublicKey,
-    pub(super) bootstrap_token: Option<Vec<u8>>,
+    pub(super) bootstrap_token: Option<String>,
 }
 
-pub struct ChallengeContext {
+pub(super) struct ChallengeContext {
     pub(super) challenge: AuthChallenge,
     pub(super) pubkey: authn::PublicKey,
+    pub(super) bootstrap_token: Option<String>,
 }
 
 pub(super) struct ChallengeSolution {
@@ -37,10 +38,7 @@ smlang::statemachine!(
     }
 );
 
-async fn get_client_id(
-    db: &DatabasePool,
-    pubkey: &authn::PublicKey,
-) -> Result<Option<OperatorId>, Error> {
+async fn get_client_id(db: &DatabasePool, pubkey: &authn::PublicKey) -> Result<Option<i32>, Error> {
     let mut conn = db.get().await.map_err(|e| {
         error!(error = ?e, "Database pool error");
         Error::internal("Database unavailable")
@@ -49,7 +47,7 @@ async fn get_client_id(
     operator_identity::table
         .filter(operator_identity::public_key.eq(pubkey.to_bytes()))
         .select(operator_identity::id)
-        .first::<OperatorId>(&mut conn)
+        .first::<i32>(&mut conn)
         .await
         .optional()
         .map_err(|e| {
@@ -58,14 +56,14 @@ async fn get_client_id(
         })
 }
 
-async fn register_key(db: &DatabasePool, pubkey: &authn::PublicKey) -> Result<OperatorId, Error> {
+async fn register_key(db: &DatabasePool, pubkey: &authn::PublicKey) -> Result<i32, 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")
     })?;
 
-    let id: OperatorId = diesel::insert_into(operator_identity::table)
+    let id: i32 = diesel::insert_into(operator_identity::table)
         .values((operator_identity::public_key.eq(pubkey_bytes),))
         .returning(operator_identity::id)
         .get_result(&mut conn)
@@ -81,16 +79,11 @@ async fn register_key(db: &DatabasePool, pubkey: &authn::PublicKey) -> Result<Op
 pub(super) struct AuthContext<'a, T: ?Sized> {
     pub(super) conn: &'a mut OperatorConnection,
     pub(super) transport: &'a mut T,
-    bootstrap_token: Option<Vec<u8>>,
 }
 
 impl<'a, T: ?Sized> AuthContext<'a, T> {
     pub(super) const fn new(conn: &'a mut OperatorConnection, transport: &'a mut T) -> Self {
-        Self {
-            conn,
-            transport,
-            bootstrap_token: None,
-        }
+        Self { conn, transport }
     }
 }
 
@@ -115,8 +108,6 @@ where
             }
         }
 
-        self.bootstrap_token = bootstrap_token;
-
         let challenge = AuthChallenge::generate(&mut rand::rng());
 
         self.transport
@@ -129,12 +120,22 @@ where
                 Error::Transport
             })?;
 
-        Ok(ChallengeContext { challenge, pubkey })
+        Ok(ChallengeContext {
+            challenge,
+            pubkey,
+            bootstrap_token,
+        })
     }
 
+    #[allow(missing_docs)]
+    #[allow(clippy::unused_unit)]
     async fn verify_solution(
         &mut self,
-        ChallengeContext { challenge, pubkey }: &ChallengeContext,
+        ChallengeContext {
+            challenge,
+            pubkey,
+            bootstrap_token,
+        }: &ChallengeContext,
         ChallengeSolution { solution }: ChallengeSolution,
     ) -> Result<Credentials, Self::Error> {
         let signature = authn::Signature::try_from(solution.as_slice()).map_err(|()| {
@@ -153,13 +154,15 @@ where
         }
 
         // Resolve client id: bootstrap (consume token + register) or lookup
-        let id = match self.bootstrap_token.take() {
+        let id = match bootstrap_token {
             Some(token) => {
                 let token_ok: bool = self
                     .conn
                     .actors
                     .bootstrapper
-                    .ask(VerifyToken { token })
+                    .ask(ConsumeToken {
+                        token: token.clone(),
+                    })
                     .await
                     .map_err(|e| {
                         error!(?e, "Failed to consume bootstrap token");

server/crates/arbiter-server/src/peers/operator/mod.rs

@@ -4,7 +4,7 @@ use crate::{
         vault::{GetState, Vault},
     },
     crypto::integrity::{self, AttestationStatus, Integrable},
-    db::{DatabaseError, DatabasePool, models::OperatorId},
+    db::{DatabaseError, DatabasePool},
     peers::client::ClientProfile,
 };
 use arbiter_crypto::authn;
@@ -25,7 +25,7 @@ pub mod vault_gate;
 
 #[derive(Debug, Clone, Hashable)]
 pub struct Credentials {
-    pub id: OperatorId,
+    pub id: i32,
     pub pubkey: authn::PublicKey,
 }
 

server/crates/arbiter-server/src/peers/operator/session/handlers.rs

@@ -5,14 +5,11 @@ use crate::{
             ClientSignTransaction, Generate, ListWallets, OperatorCreateGrant, OperatorListGrants,
             SignTransactionError as EvmSignError,
         },
-        flow_coordinator::{IsClientConnected, client_connect_approval::ClientApprovalAnswer},
+        flow_coordinator::client_connect_approval::ClientApprovalAnswer,
         vault::VaultState,
     },
-    db::{
-        models::{
-            EvmWalletAccess, EvmWalletId, NewEvmWalletAccess, ProgramClient, ProgramClientMetadata,
-        },
-        schema::program_client,
+    db::models::{
+        EvmWalletAccess, EvmWalletId, NewEvmWalletAccess, ProgramClient, ProgramClientMetadata,
     },
     evm::policies::{Grant, SpecificGrant},
 };
@@ -22,16 +19,13 @@ use alloy::{consensus::TxEip1559, primitives::Address, signers::Signature};
 use diesel::{ExpressionMethods as _, QueryDsl as _, SelectableHelper};
 use diesel_async::{AsyncConnection, RunQueryDsl};
 use kameo::{error::SendError, messages, prelude::Context};
-use tracing::{error, info, warn};
+use tracing::error;
 
 #[derive(Debug, Error)]
 pub enum SignTransactionError {
     #[error("Policy evaluation failed")]
     Vet(#[from] crate::evm::VetError),
 
-    #[error("Client not connected")]
-    ClientNotConnected,
-
     #[error("Internal signing error")]
     Internal,
 }
@@ -153,30 +147,6 @@ impl OperatorSession {
         wallet_address: Address,
         transaction: TxEip1559,
     ) -> Result<Signature, SignTransactionError> {
-        if !self.approved_client_ids.contains(&client_id) {
-            warn!(
-                client_id,
-                "operator attempted to sign for client not in its approved set"
-            );
-            return Err(SignTransactionError::ClientNotConnected);
-        }
-
-        let connected = self
-            .props
-            .actors
-            .flow_coordinator
-            .ask(IsClientConnected { client_id })
-            .await
-            .unwrap_or(false);
-
-        if !connected {
-            self.approved_client_ids.remove(&client_id);
-            warn!(client_id, "operator attempted to sign for disconnected client");
-            return Err(SignTransactionError::ClientNotConnected);
-        }
-
-        info!(client_id, event = "sign_transaction", "operator.sign_transaction");
-
         match self
             .props
             .actors
@@ -232,7 +202,7 @@ impl OperatorSession {
             use crate::db::schema::evm_wallet_access;
             for entry in entries {
                 diesel::delete(evm_wallet_access::table)
-                    .filter(evm_wallet_access::id.eq(entry))
+                    .filter(evm_wallet_access::wallet_id.eq(entry))
                     .execute(&mut *conn)
                     .await?;
             }
@@ -248,7 +218,8 @@ impl OperatorSession {
         &mut self,
     ) -> Result<Vec<EvmWalletAccess>, Error> {
         let mut conn = self.props.db.get().await?;
-        let access_entries = crate::db::schema::evm_wallet_access::table
+        use crate::db::schema::evm_wallet_access;
+        let access_entries = evm_wallet_access::table
             .select(EvmWalletAccess::as_select())
             .load::<_>(&mut conn)
             .await?;
@@ -285,30 +256,6 @@ impl OperatorSession {
 
         ctx.actor_ref().unlink(&pending_approval.controller).await;
 
-        if approved {
-            let pubkey_bytes = pending_approval.pubkey.to_bytes();
-            match self.props.db.get().await {
-                Ok(mut conn) => {
-                    match program_client::table
-                        .filter(program_client::public_key.eq(pubkey_bytes.as_slice()))
-                        .select(program_client::id)
-                        .first::<i32>(&mut conn)
-                        .await
-                    {
-                        Ok(client_id) => {
-                            self.approved_client_ids.insert(client_id);
-                        }
-                        Err(err) => {
-                            error!(?err, "Failed to look up client_id for approved pubkey");
-                        }
-                    }
-                }
-                Err(err) => {
-                    error!(?err, "DB pool error after client approval");
-                }
-            }
-        }
-
         Ok(())
     }
 
@@ -331,142 +278,3 @@ impl OperatorSession {
         Ok(clients)
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use crate::db::{self, models::{EvmWalletId, NewEvmWalletAccess}, schema::evm_wallet_access};
-    use diesel::{ExpressionMethods as _, QueryDsl as _, SelectableHelper};
-    use diesel_async::{AsyncConnection, RunQueryDsl};
-
-    /// Regression test: revocation must delete by access-entry `id`, not by `wallet_id`.
-    ///
-    /// Before the fix, revoking `entry_id=1` would delete all rows where `wallet_id=1`,
-    /// wiping out every client's access to wallet #1.
-    #[tokio::test]
-    async fn revoke_deletes_by_entry_id_not_wallet_id() {
-        use crate::db::models::EvmWalletAccess;
-
-        let pool = db::create_test_pool().await;
-        let mut conn = pool.get().await.expect("pool connection");
-
-        // Insert two access entries for the same wallet but different clients.
-        // entry A: id will be 1, wallet_id=1, client_id=10
-        // entry B: id will be 2, wallet_id=1, client_id=20
-        let entry_a = diesel::insert_into(evm_wallet_access::table)
-            .values(NewEvmWalletAccess {
-                wallet_id: EvmWalletId::from_raw(1),
-                client_id: 10,
-            })
-            .returning(EvmWalletAccess::as_select())
-            .get_result(&mut *conn)
-            .await
-            .expect("insert entry A");
-
-        let entry_b = diesel::insert_into(evm_wallet_access::table)
-            .values(NewEvmWalletAccess {
-                wallet_id: EvmWalletId::from_raw(1),
-                client_id: 20,
-            })
-            .returning(EvmWalletAccess::as_select())
-            .get_result(&mut *conn)
-            .await
-            .expect("insert entry B");
-
-        // Revoke only entry A by its primary key id.
-        conn.transaction(async |conn| {
-            diesel::delete(evm_wallet_access::table)
-                .filter(evm_wallet_access::id.eq(entry_a.id))
-                .execute(&mut *conn)
-                .await
-        })
-        .await
-        .expect("revoke entry A");
-
-        // Entry A must be gone.
-        let gone = evm_wallet_access::table
-            .filter(evm_wallet_access::id.eq(entry_a.id))
-            .count()
-            .get_result::<i64>(&mut *conn)
-            .await
-            .expect("count entry A");
-        assert_eq!(gone, 0, "revoked entry must be deleted");
-
-        // Entry B (same wallet, different client) must still exist.
-        let still_there = evm_wallet_access::table
-            .filter(evm_wallet_access::id.eq(entry_b.id))
-            .count()
-            .get_result::<i64>(&mut *conn)
-            .await
-            .expect("count entry B");
-        assert_eq!(still_there, 1, "unrelated entry must not be deleted");
-    }
-
-    /// Regression test: when `entry_id` and `wallet_id` differ, only the correct row is removed.
-    ///
-    /// This specifically catches the case where `entry.id=5` and `wallet_id=1` are different values;
-    /// the old bug would delete by `wallet_id`, potentially matching a completely different entry.
-    #[tokio::test]
-    async fn revoke_with_mismatched_wallet_and_entry_ids() {
-        use crate::db::models::EvmWalletAccess;
-
-        let pool = db::create_test_pool().await;
-        let mut conn = pool.get().await.expect("pool connection");
-
-        // Insert entries to force auto-increment IDs to diverge from wallet_ids.
-        // We'll insert 5 placeholder entries first so that the real entry gets id=6.
-        for i in 1_i32..=5 {
-            diesel::insert_into(evm_wallet_access::table)
-                .values(NewEvmWalletAccess {
-                    wallet_id: EvmWalletId::from_raw(99),
-                    client_id: i,
-                })
-                .execute(&mut *conn)
-                .await
-                .expect("insert placeholder");
-        }
-
-        // Real target: wallet_id=1, will get id=6.
-        let target = diesel::insert_into(evm_wallet_access::table)
-            .values(NewEvmWalletAccess {
-                wallet_id: EvmWalletId::from_raw(1),
-                client_id: 1,
-            })
-            .returning(EvmWalletAccess::as_select())
-            .get_result(&mut *conn)
-            .await
-            .expect("insert target");
-
-        // Sanity: target.id != target.wallet_id
-        assert_ne!(
-            target.id, target.wallet_id.to_raw(),
-            "test prerequisite: id and wallet_id must differ"
-        );
-
-        // Revoke by entry id.
-        conn.transaction(async |conn| {
-            diesel::delete(evm_wallet_access::table)
-                .filter(evm_wallet_access::id.eq(target.id))
-                .execute(&mut *conn)
-                .await
-        })
-        .await
-        .expect("revoke target");
-
-        let remaining = evm_wallet_access::table
-            .filter(evm_wallet_access::id.eq(target.id))
-            .count()
-            .get_result::<i64>(&mut *conn)
-            .await
-            .expect("count target");
-        assert_eq!(remaining, 0, "target must be deleted by its entry id");
-
-        // Placeholders for wallet_id=99 must be untouched.
-        let placeholders = evm_wallet_access::table
-            .filter(evm_wallet_access::wallet_id.eq(99))
-            .count()
-            .get_result::<i64>(&mut *conn)
-            .await
-            .expect("count placeholders");
-        assert_eq!(placeholders, 5, "unrelated entries must survive");
-    }
-}

server/crates/arbiter-server/src/peers/operator/session/mod.rs

@@ -1,14 +1,16 @@
 use super::{OutOfBand, OperatorConnection};
 use crate::{
     actors::{
-        flow_coordinator::{GetConnectedClientIds, client_connect_approval::{ClientApprovalAnswer, ClientApprovalController}}, operator_registry::ConnectOperator,
-    }, peers::client::ClientProfile,
+        flow_coordinator::client_connect_approval::ClientApprovalController,
+        operator_registry::ConnectOperator,
+    },
+    peers::client::ClientProfile,
 };
 use arbiter_crypto::authn;
 use arbiter_proto::transport::Sender;
 
 use kameo::{Actor, actor::ActorRef, messages};
-use std::{borrow::Cow, collections::{HashMap, HashSet}};
+use std::{borrow::Cow, collections::HashMap};
 use thiserror::Error;
 use tracing::error;
 
@@ -52,10 +54,6 @@ pub struct OperatorSession {
     sender: Box<dyn Sender<OutOfBand>>,
 
     pending_client_approvals: HashMap<Vec<u8>, PendingClientApproval>,
-    /// DB `client_ids` this operator session is allowed to sign for.
-    /// Seeded from currently-connected clients on start, then updated as
-    /// approvals are granted or denied during the session lifetime.
-    approved_client_ids: HashSet<i32>,
 }
 
 pub mod handlers;
@@ -65,8 +63,7 @@ impl OperatorSession {
         Self {
             props,
             sender,
-            pending_client_approvals: HashMap::default(),
-            approved_client_ids: HashSet::default(),
+            pending_client_approvals: Default::default(),
         }
     }
 }
@@ -91,7 +88,6 @@ impl OperatorSession {
                 actor = "operator",
                 event = "failed to announce new client connection"
             );
-            let _ = controller.tell(ClientApprovalAnswer { approved: false }).await;
             return;
         }
 
@@ -110,7 +106,7 @@ impl Actor for OperatorSession {
 
     type Error = Error;
 
-    async fn on_start(mut args: Self::Args, this: ActorRef<Self>) -> Result<Self, Self::Error> {
+    async fn on_start(args: Self::Args, this: ActorRef<Self>) -> Result<Self, Self::Error> {
         args.props
             .actors
             .operator_registry
@@ -125,16 +121,6 @@ impl Actor for OperatorSession {
                 );
                 Error::internal("Failed to register operator connection with operator registry")
             })?;
-
-        // Seed approved set with clients already connected when this session starts.
-        // New clients will be added via handle_new_client_approve as they are approved.
-        match args.props.actors.flow_coordinator.ask(GetConnectedClientIds {}).await {
-            Ok(ids) => args.approved_client_ids.extend(ids),
-            Err(err) => {
-                error!(?err, "Failed to fetch connected client IDs on operator session start");
-            }
-        }
-
         Ok(args)
     }
 

server/crates/arbiter-server/src/peers/operator/vault_gate/mod.rs

@@ -3,9 +3,8 @@ use crate::{
     actors::{
         GlobalActors,
         vault::{self, Bootstrap, GetState, TryUnseal, VaultState, events},
-        vault_coordinator::{self, ContributeBootstrap, ContributeUnseal, StartBootstrap},
     },
-    crypto::{KeyCell, integrity},
+    crypto::integrity::{self},
     db::DatabasePool,
 };
 use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
@@ -26,29 +25,17 @@ pub enum Error {
     AlreadyBootstrapped,
     #[error("Invalid key provided")]
     InvalidKey,
-    #[error("Vault locked: too many failed unseal attempts")]
-    LockedOut,
+
     #[error("State transition failed")]
     State,
-    #[error("Vault ceremony failed: {0}")]
-    Ceremony(#[from] vault_coordinator::Error),
+
     #[error("Internal error: {0}")]
     Internal(String),
 }
-
 impl Error {
     fn internal(message: impl Into<String>) -> Self {
         Self::Internal(message.into())
     }
-
-    /// Preserve the coordinator's own error so the operator learns why a
-    /// ceremony was refused instead of reading "internal error".
-    fn ceremony<M>(error: SendError<M, vault_coordinator::Error>) -> Self {
-        match error {
-            SendError::HandlerError(inner) => Self::Ceremony(inner),
-            _ => Self::internal("VaultCoordinator unavailable"),
-        }
-    }
 }
 
 pub struct HandshakeResponse {
@@ -82,6 +69,7 @@ impl VaultGate {
 
 impl Actor for VaultGate {
     type Args = Self;
+
     type Error = ();
 
     async fn on_start(
@@ -112,8 +100,11 @@ impl VaultGate {
         associated_data: &[u8],
     ) -> Result<SafeCell<Vec<u8>>, ()> {
         let nonce = XNonce::from_slice(nonce);
+
         let cipher = XChaCha20Poly1305::new(secret.as_bytes().into());
+
         let mut key_buffer = SafeCell::new(ciphertext.to_vec());
+
         let decryption_result = key_buffer.write_inline(|write_handle| {
             cipher.decrypt_in_place(nonce, associated_data, write_handle)
         });
@@ -126,13 +117,9 @@ impl VaultGate {
             }
         }
     }
-
-    fn key_cell(buffer: SafeCell<Vec<u8>>) -> Result<KeyCell, Error> {
-        KeyCell::try_from(buffer).map_err(|()| Error::InvalidKey)
-    }
 }
 
-#[messages]
+#[messages(messages = Inbound, replies = Outbound)]
 impl VaultGate {
     #[message]
     pub fn handle_handshake(
@@ -141,11 +128,14 @@ impl VaultGate {
     ) -> Result<HandshakeResponse, Error> {
         let ephemeral_secret = EphemeralSecret::random();
         let public_key = PublicKey::from(&ephemeral_secret);
+
         let secret = ephemeral_secret.diffie_hellman(&client_pubkey);
+
         self.state = State::ReadyForExchange {
             server_key: public_key,
             secret,
         };
+
         Ok(HandshakeResponse {
             server_pubkey: public_key,
         })
@@ -161,17 +151,25 @@ impl VaultGate {
         let State::ReadyForExchange { secret, .. } = &self.state else {
             return Err(Error::State);
         };
-        let seal_key = Self::decrypt_key(secret, &nonce, &ciphertext, &associated_data)
-            .map_err(|()| Error::InvalidKey)
-            .and_then(Self::key_cell)?;
 
-        match self.actors.vault.ask(TryUnseal { seal_key }).await {
+        let Ok(seal_key_buffer) = Self::decrypt_key(secret, &nonce, &ciphertext, &associated_data)
+        else {
+            return Err(Error::InvalidKey);
+        };
+
+        match self
+            .actors
+            .vault
+            .ask(TryUnseal {
+                seal_key_raw: seal_key_buffer,
+            })
+            .await
+        {
             Ok(()) => {
                 info!("Successfully unsealed key with client-provided key");
                 Ok(())
             }
             Err(SendError::HandlerError(vault::Error::InvalidKey)) => Err(Error::InvalidKey),
-            Err(SendError::HandlerError(vault::Error::LockedOut)) => Err(Error::LockedOut),
             Err(SendError::HandlerError(err)) => {
                 error!(?err, "Vault failed to unseal key");
                 Err(Error::InvalidKey)
@@ -193,16 +191,17 @@ impl VaultGate {
         let State::ReadyForExchange { secret, .. } = &self.state else {
             return Err(Error::State);
         };
-        let seal_key = Self::decrypt_key(secret, &nonce, &ciphertext, &associated_data)
-            .map_err(|()| Error::InvalidKey)
-            .and_then(Self::key_cell)?;
+
+        let Ok(seal_key_buffer) = Self::decrypt_key(secret, &nonce, &ciphertext, &associated_data)
+        else {
+            return Err(Error::InvalidKey);
+        };
 
         match self
             .actors
             .vault
             .ask(Bootstrap {
-                seal_key,
-                custody: None,
+                seal_key_raw: seal_key_buffer,
             })
             .await
         {
@@ -226,53 +225,14 @@ impl VaultGate {
 
     #[message]
     pub async fn handle_vault_state(&mut self) -> Result<VaultState, Error> {
-        self.actors
+        let answer = self
+            .actors
             .vault
             .ask(GetState {})
             .await
-            .map_err(|_| Error::internal("failed to query vault"))
-    }
+            .map_err(|_| Error::internal("failed to query vault"))?;
 
-    #[message]
-    pub async fn handle_declare_committee(&mut self, count: usize) -> Result<(), Error> {
-        self.actors
-            .vault_coordinator
-            .ask(StartBootstrap {
-                operator_id: self.auth_creds.id,
-                declared_count: count,
-            })
-            .await
-            .map_err(Error::ceremony)
-    }
-
-    #[message]
-    pub async fn handle_contribute_bootstrap_passphrase(
-        &mut self,
-        passphrase: Vec<u8>,
-    ) -> Result<bool, Error> {
-        self.actors
-            .vault_coordinator
-            .ask(ContributeBootstrap {
-                operator_id: self.auth_creds.id,
-                passphrase: SafeCell::new(passphrase),
-            })
-            .await
-            .map_err(Error::ceremony)
-    }
-
-    #[message]
-    pub async fn handle_contribute_unseal_passphrase(
-        &mut self,
-        passphrase: Vec<u8>,
-    ) -> Result<bool, Error> {
-        self.actors
-            .vault_coordinator
-            .ask(ContributeUnseal {
-                operator_id: self.auth_creds.id,
-                passphrase: SafeCell::new(passphrase),
-            })
-            .await
-            .map_err(Error::ceremony)
+        Ok(answer)
     }
 }
 
@@ -326,75 +286,3 @@ impl Message<events::Unsealed> for VaultGate {
         ctx.stop();
     }
 }
-
-pub enum Inbound {
-    HandleHandshake(HandleHandshake),
-    HandleUnsealEncryptedKey(HandleUnsealEncryptedKey),
-    HandleBootstrapEncryptedKey(HandleBootstrapEncryptedKey),
-    HandleVaultState,
-    HandleDeclareCommittee(HandleDeclareCommittee),
-    HandleContributeBootstrapPassphrase(HandleContributeBootstrapPassphrase),
-    HandleContributeUnsealPassphrase(HandleContributeUnsealPassphrase),
-}
-
-pub enum Outbound {
-    HandleHandshake(Result<HandshakeResponse, Error>),
-    HandleUnsealEncryptedKey(Result<(), Error>),
-    HandleBootstrapEncryptedKey(Result<(), Error>),
-    HandleVaultState(Result<VaultState, Error>),
-    HandleDeclareCommittee(Result<(), Error>),
-    HandleContributeBootstrapPassphrase(Result<bool, Error>),
-    HandleContributeUnsealPassphrase(Result<bool, Error>),
-}
-
-impl Message<Inbound> for VaultGate {
-    type Reply = Result<Outbound, Error>;
-
-    async fn handle(
-        &mut self,
-        msg: Inbound,
-        _ctx: &mut kameo::prelude::Context<Self, Self::Reply>,
-    ) -> Self::Reply {
-        match msg {
-            Inbound::HandleHandshake(message) => Ok(Outbound::HandleHandshake(
-                self.handle_handshake(message.client_pubkey),
-            )),
-            Inbound::HandleUnsealEncryptedKey(message) => Ok(Outbound::HandleUnsealEncryptedKey(
-                self.handle_unseal_encrypted_key(
-                    message.nonce,
-                    message.ciphertext,
-                    message.associated_data,
-                )
-                .await,
-            )),
-            Inbound::HandleBootstrapEncryptedKey(message) => {
-                Ok(Outbound::HandleBootstrapEncryptedKey(
-                    self.handle_bootstrap_encrypted_key(
-                        message.nonce,
-                        message.ciphertext,
-                        message.associated_data,
-                    )
-                    .await,
-                ))
-            }
-            Inbound::HandleVaultState => {
-                Ok(Outbound::HandleVaultState(self.handle_vault_state().await))
-            }
-            Inbound::HandleDeclareCommittee(message) => Ok(Outbound::HandleDeclareCommittee(
-                self.handle_declare_committee(message.count).await,
-            )),
-            Inbound::HandleContributeBootstrapPassphrase(message) => {
-                Ok(Outbound::HandleContributeBootstrapPassphrase(
-                    self.handle_contribute_bootstrap_passphrase(message.passphrase)
-                        .await,
-                ))
-            }
-            Inbound::HandleContributeUnsealPassphrase(message) => {
-                Ok(Outbound::HandleContributeUnsealPassphrase(
-                    self.handle_contribute_unseal_passphrase(message.passphrase)
-                        .await,
-                ))
-            }
-        }
-    }
-}

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

@@ -1,12 +1,15 @@
 use super::common::ChannelTransport;
-use arbiter_crypto::authn::{self, AuthChallenge, CLIENT_CONTEXT};
+use arbiter_crypto::{
+    authn::{self, AuthChallenge, CLIENT_CONTEXT},
+    safecell::{SafeCell, SafeCellHandle as _},
+};
 use arbiter_proto::{
     ClientMetadata,
     transport::{Receiver, Sender},
 };
 use arbiter_server::{
     actors::{GlobalActors, vault::Bootstrap},
-    crypto::{KeyCell, integrity},
+    crypto::integrity,
     db::{self, schema},
     peers::client::{ClientConnection, ClientCredentials, auth, connect_client},
 };
@@ -97,8 +100,7 @@ async fn spawn_test_actors(db: &db::DatabasePool) -> GlobalActors {
     actors
         .vault
         .ask(Bootstrap {
-            seal_key: KeyCell::from([0u8; 32]),
-            custody: None,
+            seal_key_raw: SafeCell::new(b"test-seal-key".to_vec()),
         })
         .await
         .unwrap();
@@ -264,7 +266,7 @@ pub async fn metadata_unchanged_does_not_append_history() {
 
 #[tokio::test]
 #[test_log::test]
-pub async fn metadata_frozen_after_approval_ignores_reconnect_changes() {
+pub async fn metadata_change_appends_history_and_repoints_binding() {
     let db = db::create_test_pool().await;
     let actors = spawn_test_actors(&db).await;
     let new_key = MlDsa87::key_gen(&mut rand::rng());
@@ -285,7 +287,6 @@ pub async fn metadata_frozen_after_approval_ignores_reconnect_changes() {
         connect_client(props, &mut server_transport).await;
     });
 
-    // Reconnect presenting different metadata — must be silently ignored.
     test_transport
         .send(auth::Inbound::AuthChallengeRequest {
             pubkey: verifying_key(&new_key).into(),
@@ -312,7 +313,6 @@ pub async fn metadata_frozen_after_approval_ignores_reconnect_changes() {
             client_metadata, client_metadata_history, program_client,
         };
         let mut conn = db.get().await.unwrap();
-        // Metadata is frozen: no new row, no history entry.
         let metadata_count: i64 = client_metadata::table
             .count()
             .get_result(&mut conn)
@@ -338,19 +338,15 @@ pub async fn metadata_frozen_after_approval_ignores_reconnect_changes() {
             .first::<(String, Option<String>, Option<String>)>(&mut conn)
             .await
             .unwrap();
-        assert_eq!(
-            metadata_count, 1,
-            "frozen: no new metadata row on reconnect"
-        );
-        assert_eq!(history_count, 0, "frozen: no history entry on reconnect");
+        assert_eq!(metadata_count, 2);
+        assert_eq!(history_count, 1);
         assert_eq!(
             current,
             (
                 "client".to_owned(),
-                Some("old".to_owned()),
-                Some("1.0.0".to_owned())
-            ),
-            "frozen: original metadata must be preserved"
+                Some("new".to_owned()),
+                Some("2.0.0".to_owned())
+            )
         );
     }
 }

server/crates/arbiter-server/tests/common/mod.rs

@@ -2,11 +2,10 @@
     dead_code,
     reason = "Common test utilities that may not be used in every test"
 )]
-
+use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
 use arbiter_proto::transport::{Bi, Error, Receiver, Sender};
 use arbiter_server::{
     actors::{GlobalActors, vault::Vault},
-    crypto::KeyCell,
     db::{self, schema},
 };
 
@@ -20,7 +19,7 @@ pub(crate) async fn bootstrapped_vault(db: &db::DatabasePool) -> Vault {
         .await
         .unwrap();
     actor
-        .bootstrap(KeyCell::from([0u8; 32]), None)
+        .bootstrap(SafeCell::new(b"test-seal-key".to_vec()))
         .await
         .unwrap();
     actor

server/crates/arbiter-server/tests/operator/auth.rs

@@ -1,10 +1,13 @@
 use super::common::ChannelTransport;
-use arbiter_crypto::authn::{self, AuthChallenge, OPERATOR_CONTEXT};
+use arbiter_crypto::{
+    authn::{self, AuthChallenge, OPERATOR_CONTEXT},
+    safecell::{SafeCell, SafeCellHandle as _},
+};
 use arbiter_proto::transport::{Error as TransportError, Receiver, Sender};
 use arbiter_server::{
     actors::{GlobalActors, bootstrap::GetToken, vault::Bootstrap},
-    crypto::{KeyCell, integrity},
-    db::{self, models::OperatorId, schema},
+    crypto::integrity,
+    db::{self, schema},
     peers::operator::{self, Credentials, OperatorConnection, auth, vault_gate},
 };
 
@@ -151,6 +154,13 @@ impl Sender<auth::Inbound> for StartTestTransport {
 pub async fn bootstrap_token_auth() {
     let db = db::create_test_pool().await;
     let actors = GlobalActors::spawn(db.clone()).await.unwrap();
+    actors
+        .vault
+        .ask(Bootstrap {
+            seal_key_raw: SafeCell::new(b"test-seal-key".to_vec()),
+        })
+        .await
+        .unwrap();
     let token = actors.bootstrapper.ask(GetToken).await.unwrap().unwrap();
 
     let (mut server_transport, mut test_transport) = ChannelTransport::new();
@@ -164,7 +174,7 @@ pub async fn bootstrap_token_auth() {
     test_transport
         .send(auth::Inbound::AuthChallengeRequest {
             pubkey: verifying_key(&new_key).into(),
-            bootstrap_token: Some(token.into_bytes()),
+            bootstrap_token: Some(token),
         })
         .await
         .unwrap();
@@ -221,7 +231,7 @@ pub async fn bootstrap_invalid_token_auth() {
     test_transport
         .send(auth::Inbound::AuthChallengeRequest {
             pubkey: verifying_key(&new_key).into(),
-            bootstrap_token: Some(b"invalid_token".to_vec()),
+            bootstrap_token: Some("invalid_token".to_owned()),
         })
         .await
         .unwrap();
@@ -265,8 +275,7 @@ pub async fn challenge_auth() {
     actors
         .vault
         .ask(Bootstrap {
-            seal_key: KeyCell::from([0u8; 32]),
-            custody: None,
+            seal_key_raw: SafeCell::new(b"test-seal-key".to_vec()),
         })
         .await
         .unwrap();
@@ -276,10 +285,10 @@ pub async fn challenge_auth() {
 
     {
         let mut conn = db.get().await.unwrap();
-        let id: OperatorId = insert_into(schema::operator_identity::table)
+        let id: i32 = insert_into(schema::operator_identity::table)
             .values((schema::operator_identity::public_key.eq(pubkey_bytes.clone()),))
             .returning(schema::operator_identity::id)
-            .get_result::<OperatorId>(&mut conn)
+            .get_result(&mut conn)
             .await
             .unwrap();
         integrity::sign_entity(
@@ -352,8 +361,7 @@ pub async fn challenge_auth_rejects_integrity_tag_mismatch_when_unsealed() {
     actors
         .vault
         .ask(Bootstrap {
-            seal_key: KeyCell::from([0u8; 32]),
-            custody: None,
+            seal_key_raw: SafeCell::new(b"test-seal-key".to_vec()),
         })
         .await
         .unwrap();
@@ -392,7 +400,7 @@ pub async fn challenge_auth_rejects_integrity_tag_mismatch_when_unsealed() {
     let challenge = match response {
         Ok(resp) => match resp {
             auth::Outbound::AuthChallenge { challenge } => challenge,
-            other @ auth::Outbound::AuthSuccess => panic!("Expected AuthChallenge, got {other:?}"),
+            other => panic!("Expected AuthChallenge, got {other:?}"),
         },
         Err(err) => panic!("Expected Ok response, got Err({err:?})"),
     };
@@ -426,8 +434,7 @@ pub async fn challenge_auth_rejects_invalid_signature() {
     actors
         .vault
         .ask(Bootstrap {
-            seal_key: KeyCell::from([0u8; 32]),
-            custody: None,
+            seal_key_raw: SafeCell::new(b"test-seal-key".to_vec()),
         })
         .await
         .unwrap();
@@ -437,10 +444,10 @@ pub async fn challenge_auth_rejects_invalid_signature() {
 
     {
         let mut conn = db.get().await.unwrap();
-        let id: OperatorId = insert_into(schema::operator_identity::table)
+        let id: i32 = insert_into(schema::operator_identity::table)
             .values((schema::operator_identity::public_key.eq(pubkey_bytes.clone()),))
             .returning(schema::operator_identity::id)
-            .get_result::<OperatorId>(&mut conn)
+            .get_result(&mut conn)
             .await
             .unwrap();
         integrity::sign_entity(
@@ -499,92 +506,3 @@ pub async fn challenge_auth_rejects_invalid_signature() {
         Err(auth::Error::InvalidChallengeSolution)
     ));
 }
-
-/// The bootstrap token authorises registering committee members *before* the
-/// vault exists. Once any bootstrap path succeeds it must stop working, or its
-/// holder could keep minting operator identities until the next restart.
-#[tokio::test]
-#[test_log::test]
-pub async fn bootstrap_token_rejected_after_bootstrap() {
-    let db = db::create_test_pool().await;
-    let actors = GlobalActors::spawn(db.clone()).await.unwrap();
-    let token = actors.bootstrapper.ask(GetToken).await.unwrap().unwrap();
-
-    actors
-        .vault
-        .ask(Bootstrap {
-            seal_key: KeyCell::from([0u8; 32]),
-            custody: None,
-        })
-        .await
-        .unwrap();
-
-    // `Bootstrapped` travels through the message bus, so the token disappears
-    // a couple of actor turns after the bootstrap call returns.
-    let mut retired = false;
-    for _ in 0..100 {
-        if actors.bootstrapper.ask(GetToken).await.unwrap().is_none() {
-            retired = true;
-            break;
-        }
-        tokio::task::yield_now().await;
-    }
-    assert!(
-        retired,
-        "the bootstrap token must be retired once the vault is bootstrapped"
-    );
-
-    let (mut server_transport, mut test_transport) = ChannelTransport::new();
-    let db_for_task = db.clone();
-    let task = tokio::spawn(async move {
-        let mut props = OperatorConnection::new(db_for_task, actors);
-        auth::authenticate(&mut props, &mut server_transport).await
-    });
-
-    let new_key = MlDsa87::key_gen(&mut rand::rng());
-    test_transport
-        .send(auth::Inbound::AuthChallengeRequest {
-            pubkey: verifying_key(&new_key).into(),
-            bootstrap_token: Some(token.into_bytes()),
-        })
-        .await
-        .unwrap();
-
-    let response = test_transport
-        .recv()
-        .await
-        .expect("should receive challenge");
-    let challenge = match response {
-        Ok(auth::Outbound::AuthChallenge { challenge }) => challenge,
-        other => panic!("Expected AuthChallenge, got {other:?}"),
-    };
-
-    let signature = sign_operator_challenge(&new_key, &challenge);
-    test_transport
-        .send(auth::Inbound::AuthChallengeSolution {
-            signature: signature.to_bytes(),
-        })
-        .await
-        .unwrap();
-
-    let response = test_transport
-        .recv()
-        .await
-        .expect("should receive auth result");
-    assert!(
-        matches!(response, Err(auth::Error::InvalidBootstrapToken)),
-        "a spent bootstrap token must not authorise a new identity, got {response:?}"
-    );
-    assert!(task.await.unwrap().is_err(), "authentication must fail");
-
-    let mut conn = db.get().await.unwrap();
-    let registered: i64 = schema::operator_identity::table
-        .count()
-        .get_result(&mut conn)
-        .await
-        .unwrap();
-    assert_eq!(
-        registered, 0,
-        "no identity may be registered after the bootstrap"
-    );
-}

server/crates/arbiter-server/tests/operator/unseal.rs

@@ -1,11 +1,13 @@
-use arbiter_crypto::authn;
+use arbiter_crypto::{
+    authn,
+    safecell::{SafeCell, SafeCellHandle as _},
+};
 use arbiter_server::{
     actors::{
         GlobalActors,
         vault::{Bootstrap, Seal},
     },
-    crypto::KeyCell,
-    db::{self, models::OperatorId},
+    db,
     peers::operator::{
         Credentials,
         vault_gate::{
@@ -20,7 +22,7 @@ use tokio::sync::oneshot;
 use x25519_dalek::{EphemeralSecret, PublicKey};
 
 async fn setup_sealed_gate(
-    seal_key: [u8; 32],
+    seal_key: &[u8],
 ) -> (
     db::DatabasePool,
     kameo::actor::ActorRef<VaultGate>,
@@ -32,8 +34,7 @@ async fn setup_sealed_gate(
     actors
         .vault
         .ask(Bootstrap {
-            seal_key: KeyCell::from(seal_key),
-            custody: None,
+            seal_key_raw: SafeCell::new(seal_key.to_vec()),
         })
         .await
         .unwrap();
@@ -41,10 +42,7 @@ async fn setup_sealed_gate(
 
     let (promotion_tx, promotion_rx) = oneshot::channel();
     let pubkey = authn::SigningKey::generate().public_key();
-    let auth_creds = Credentials {
-        id: OperatorId::from_raw(1),
-        pubkey,
-    };
+    let auth_creds = Credentials { id: 1, pubkey };
     let gate = VaultGate::spawn(VaultGate::new(auth_creds, actors, db.clone(), promotion_tx));
 
     (db, gate, promotion_rx)
@@ -85,10 +83,10 @@ async fn client_dh_encrypt(
 #[tokio::test]
 #[test_log::test]
 pub async fn unseal_success() {
-    let seal_key = [7u8; 32];
+    let seal_key = b"test-seal-key";
     let (_db, gate, _promotion_rx) = setup_sealed_gate(seal_key).await;
 
-    let encrypted_key = client_dh_encrypt(&gate, &seal_key).await;
+    let encrypted_key = client_dh_encrypt(&gate, seal_key).await;
 
     let response = gate.ask(encrypted_key).await;
     assert!(matches!(response, Ok(())));
@@ -97,10 +95,10 @@ pub async fn unseal_success() {
 #[tokio::test]
 #[test_log::test]
 pub async fn unseal_wrong_seal_key() {
-    let seal_key = [7u8; 32];
+    let seal_key = b"test-seal-key";
     let (_db, gate, _promotion_rx) = setup_sealed_gate(seal_key).await;
 
-    let encrypted_key = client_dh_encrypt(&gate, &[8u8; 32]).await;
+    let encrypted_key = client_dh_encrypt(&gate, b"wrong-key").await;
 
     let response = gate.ask(encrypted_key).await;
     assert!(matches!(
@@ -114,7 +112,7 @@ pub async fn unseal_wrong_seal_key() {
 #[tokio::test]
 #[test_log::test]
 pub async fn unseal_corrupted_ciphertext() {
-    let seal_key = [7u8; 32];
+    let seal_key = b"test-seal-key";
     let (_db, gate, _promotion_rx) = setup_sealed_gate(seal_key).await;
 
     let client_secret = EphemeralSecret::random();
@@ -145,11 +143,11 @@ pub async fn unseal_corrupted_ciphertext() {
 #[tokio::test]
 #[test_log::test]
 pub async fn unseal_retry_after_invalid_key() {
-    let seal_key = [9u8; 32];
+    let seal_key = b"real-seal-key";
     let (_db, gate, _promotion_rx) = setup_sealed_gate(seal_key).await;
 
     {
-        let encrypted_key = client_dh_encrypt(&gate, &[8u8; 32]).await;
+        let encrypted_key = client_dh_encrypt(&gate, b"wrong-key").await;
 
         let response = gate.ask(encrypted_key).await;
         assert!(matches!(
@@ -161,7 +159,7 @@ pub async fn unseal_retry_after_invalid_key() {
     }
 
     {
-        let encrypted_key = client_dh_encrypt(&gate, &seal_key).await;
+        let encrypted_key = client_dh_encrypt(&gate, seal_key).await;
 
         let response = gate.ask(encrypted_key).await;
         assert!(matches!(response, Ok(())));

server/crates/arbiter-server/tests/vault.rs

@@ -2,8 +2,6 @@ mod common;
 
 #[path = "vault/concurrency.rs"]
 mod concurrency;
-#[path = "vault/custody.rs"]
-mod custody;
 #[path = "vault/lifecycle.rs"]
 mod lifecycle;
 #[path = "vault/storage.rs"]

server/crates/arbiter-server/tests/vault/concurrency.rs

@@ -5,7 +5,6 @@ use arbiter_server::{
         GlobalActors,
         vault::{CreateNew, Error, Vault},
     },
-    crypto::KeyCell,
     db::{self, models, schema},
 };
 
@@ -15,8 +14,6 @@ use kameo::actor::{ActorRef, Spawn as _};
 use std::collections::{HashMap, HashSet};
 use tokio::task::JoinSet;
 
-const TEST_AAD: &[u8] = b"test-aad";
-
 async fn write_concurrently(
     actor: ActorRef<Vault>,
     prefix: &'static str,
@@ -30,7 +27,6 @@ async fn write_concurrently(
             let id = actor
                 .ask(CreateNew {
                     plaintext: SafeCell::new(plaintext.clone()),
-                    aad: TEST_AAD.to_vec(),
                 })
                 .await
                 .unwrap();
@@ -124,7 +120,7 @@ async fn insert_failure_does_not_create_partial_row() {
     drop(conn);
 
     let err = actor
-        .create_new(SafeCell::new(b"should fail".to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(b"should fail".to_vec()))
         .await
         .unwrap_err();
     assert!(matches!(err, Error::DatabaseTransaction(_)));
@@ -170,12 +166,12 @@ async fn decrypt_roundtrip_after_high_concurrency() {
         .await
         .unwrap();
     decryptor
-        .try_unseal(KeyCell::from([0u8; 32]))
+        .try_unseal(SafeCell::new(b"test-seal-key".to_vec()))
         .await
         .unwrap();
 
     for (id, plaintext) in expected {
-        let mut decrypted = decryptor.decrypt(id, TEST_AAD.to_vec()).await.unwrap();
+        let mut decrypted = decryptor.decrypt(id).await.unwrap();
         assert_eq!(*decrypted.read(), plaintext);
     }
 }

server/crates/arbiter-server/tests/vault/custody.rs

@@ -1,317 +0,0 @@
-//! End-to-end coverage for the Shamir custody ceremonies.
-
-use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
-use arbiter_server::{
-    actors::{
-        GlobalActors,
-        vault::{Bootstrap, GetState, Seal, VaultState},
-        vault_coordinator::{ContributeBootstrap, ContributeUnseal, StartBootstrap},
-    },
-    crypto::{KeyCell, shamir},
-    db::{self, models::OperatorId, schema},
-};
-
-use diesel::{ExpressionMethods as _, QueryDsl};
-use diesel_async::RunQueryDsl;
-
-/// Register `count` operator identities so committee members satisfy the
-/// foreign key from `operator` to `operator_identity`.
-async fn register_operators(db: &db::DatabasePool, count: usize) -> Vec<OperatorId> {
-    let mut conn = db.get().await.unwrap();
-    let mut ids = Vec::with_capacity(count);
-    for index in 0..count {
-        let pubkey = vec![u8::try_from(index).unwrap(); 32];
-        let id: OperatorId = diesel::insert_into(schema::operator_identity::table)
-            .values((schema::operator_identity::public_key.eq(pubkey),))
-            .returning(schema::operator_identity::id)
-            .get_result(&mut conn)
-            .await
-            .unwrap();
-        ids.push(id);
-    }
-    ids
-}
-
-async fn stored_share_count(db: &db::DatabasePool) -> i64 {
-    let mut conn = db.get().await.unwrap();
-    schema::operator::table
-        .count()
-        .get_result(&mut conn)
-        .await
-        .unwrap()
-}
-
-async fn stored_threshold(db: &db::DatabasePool) -> Option<i32> {
-    let mut conn = db.get().await.unwrap();
-    schema::arbiter_settings::table
-        .select(schema::arbiter_settings::shamir_threshold)
-        .first(&mut conn)
-        .await
-        .unwrap()
-}
-
-fn passphrase(seed: u8) -> SafeCell<Vec<u8>> {
-    SafeCell::new(vec![seed; 16])
-}
-
-/// The happy path: three operators bootstrap, and any two of them reopen the
-/// vault after it is sealed.
-#[tokio::test]
-#[test_log::test]
-async fn committee_of_three_unseals_with_two_passphrases() {
-    let db = db::create_test_pool().await;
-    let actors = GlobalActors::spawn(db.clone()).await.unwrap();
-    let operators = register_operators(&db, 3).await;
-
-    actors
-        .vault_coordinator
-        .ask(StartBootstrap {
-            operator_id: operators[0],
-            declared_count: 3,
-        })
-        .await
-        .unwrap();
-
-    for (index, operator_id) in operators.iter().enumerate() {
-        let finished = actors
-            .vault_coordinator
-            .ask(ContributeBootstrap {
-                operator_id: *operator_id,
-                passphrase: passphrase(u8::try_from(index).unwrap()),
-            })
-            .await
-            .unwrap();
-        assert_eq!(
-            finished,
-            index == 2,
-            "the ceremony finishes only on the last contribution"
-        );
-    }
-
-    assert_eq!(
-        actors.vault.ask(GetState {}).await.unwrap(),
-        VaultState::Unsealed
-    );
-    assert_eq!(stored_share_count(&db).await, 3);
-    assert_eq!(stored_threshold(&db).await, Some(2));
-
-    actors.vault.ask(Seal {}).await.unwrap();
-
-    let first = actors
-        .vault_coordinator
-        .ask(ContributeUnseal {
-            operator_id: operators[0],
-            passphrase: passphrase(0),
-        })
-        .await
-        .unwrap();
-    assert!(!first, "one of two shares must not unseal");
-
-    let second = actors
-        .vault_coordinator
-        .ask(ContributeUnseal {
-            operator_id: operators[2],
-            passphrase: passphrase(2),
-        })
-        .await
-        .unwrap();
-    assert!(second, "the threshold contribution should unseal the vault");
-    assert_eq!(
-        actors.vault.ask(GetState {}).await.unwrap(),
-        VaultState::Unsealed
-    );
-}
-
-/// Shares that describe a seal key the vault never adopted would make the vault
-/// permanently un-unsealable, so a refused bootstrap must leave the table empty.
-#[tokio::test]
-#[test_log::test]
-async fn refused_bootstrap_stores_no_shares() {
-    let db = db::create_test_pool().await;
-    let actors = GlobalActors::spawn(db.clone()).await.unwrap();
-    let operators = register_operators(&db, 1).await;
-
-    // Another path bootstraps the vault first; the ceremony now has nowhere to go.
-    actors
-        .vault
-        .ask(Bootstrap {
-            seal_key: KeyCell::from([4u8; 32]),
-            custody: None,
-        })
-        .await
-        .unwrap();
-
-    actors
-        .vault_coordinator
-        .ask(StartBootstrap {
-            operator_id: operators[0],
-            declared_count: 1,
-        })
-        .await
-        .unwrap();
-
-    let error = actors
-        .vault_coordinator
-        .ask(ContributeBootstrap {
-            operator_id: operators[0],
-            passphrase: passphrase(1),
-        })
-        .await
-        .expect_err("bootstrapping an already bootstrapped vault must fail");
-    assert!(
-        format!("{error:?}").contains("AlreadyBootstrapped"),
-        "expected AlreadyBootstrapped, got {error:?}"
-    );
-
-    assert_eq!(
-        stored_share_count(&db).await,
-        0,
-        "a refused bootstrap must not leave shares behind"
-    );
-    assert_eq!(
-        stored_threshold(&db).await,
-        None,
-        "a refused bootstrap must not leave a threshold behind"
-    );
-}
-
-#[tokio::test]
-#[test_log::test]
-async fn oversized_and_degenerate_committees_are_rejected() {
-    let db = db::create_test_pool().await;
-    let actors = GlobalActors::spawn(db.clone()).await.unwrap();
-    let operators = register_operators(&db, 1).await;
-
-    for (count, expected) in [
-        (0_usize, "EmptyCommittee"),
-        (2, "UnsupportedCommittee"),
-        (shamir::MAX_COMMITTEE_SIZE + 1, "CommitteeTooLarge"),
-        (usize::MAX, "CommitteeTooLarge"),
-    ] {
-        let error = actors
-            .vault_coordinator
-            .ask(StartBootstrap {
-                operator_id: operators[0],
-                declared_count: count,
-            })
-            .await
-            .expect_err("committee size must be rejected");
-        assert!(
-            format!("{error:?}").contains(expected),
-            "expected {expected} for count {count}, got {error:?}"
-        );
-    }
-}
-
-/// A committee whose members never all show up would otherwise wedge the
-/// coordinator until restart. Only the operator that declared it may reset it.
-#[tokio::test]
-#[test_log::test]
-async fn only_the_declarer_may_restart_a_stalled_committee() {
-    let db = db::create_test_pool().await;
-    let actors = GlobalActors::spawn(db.clone()).await.unwrap();
-    let operators = register_operators(&db, 3).await;
-
-    actors
-        .vault_coordinator
-        .ask(StartBootstrap {
-            operator_id: operators[0],
-            declared_count: 3,
-        })
-        .await
-        .unwrap();
-    actors
-        .vault_coordinator
-        .ask(ContributeBootstrap {
-            operator_id: operators[0],
-            passphrase: passphrase(0),
-        })
-        .await
-        .unwrap();
-
-    let error = actors
-        .vault_coordinator
-        .ask(StartBootstrap {
-            operator_id: operators[1],
-            declared_count: 3,
-        })
-        .await
-        .expect_err("a bystander must not reset someone else's ceremony");
-    assert!(
-        format!("{error:?}").contains("AlreadyBootstrapping"),
-        "expected AlreadyBootstrapping, got {error:?}"
-    );
-
-    actors
-        .vault_coordinator
-        .ask(StartBootstrap {
-            operator_id: operators[0],
-            declared_count: 1,
-        })
-        .await
-        .expect("the declarer may restart the ceremony");
-
-    let finished = actors
-        .vault_coordinator
-        .ask(ContributeBootstrap {
-            operator_id: operators[0],
-            passphrase: passphrase(0),
-        })
-        .await
-        .unwrap();
-    assert!(
-        finished,
-        "the restarted one-operator ceremony should complete"
-    );
-    assert_eq!(stored_share_count(&db).await, 1);
-}
-
-/// A wrong passphrase must not unseal, and the operator must be able to retry.
-#[tokio::test]
-#[test_log::test]
-async fn wrong_passphrase_is_rejected_and_retryable() {
-    let db = db::create_test_pool().await;
-    let actors = GlobalActors::spawn(db.clone()).await.unwrap();
-    let operators = register_operators(&db, 1).await;
-
-    actors
-        .vault_coordinator
-        .ask(StartBootstrap {
-            operator_id: operators[0],
-            declared_count: 1,
-        })
-        .await
-        .unwrap();
-    actors
-        .vault_coordinator
-        .ask(ContributeBootstrap {
-            operator_id: operators[0],
-            passphrase: passphrase(7),
-        })
-        .await
-        .unwrap();
-    actors.vault.ask(Seal {}).await.unwrap();
-
-    let error = actors
-        .vault_coordinator
-        .ask(ContributeUnseal {
-            operator_id: operators[0],
-            passphrase: passphrase(8),
-        })
-        .await
-        .expect_err("a wrong passphrase must not unseal");
-    assert!(
-        format!("{error:?}").contains("InvalidPassphrase"),
-        "expected InvalidPassphrase, got {error:?}"
-    );
-
-    let unsealed = actors
-        .vault_coordinator
-        .ask(ContributeUnseal {
-            operator_id: operators[0],
-            passphrase: passphrase(7),
-        })
-        .await
-        .expect("the operator may retry with the correct passphrase");
-    assert!(unsealed, "the retry should unseal the vault");
-}

server/crates/arbiter-server/tests/vault/lifecycle.rs

@@ -5,28 +5,23 @@ use arbiter_server::{
         GlobalActors,
         vault::{Error, Vault},
     },
-    crypto::{
-        KeyCell,
-        encryption::v1::{Nonce, ROOT_KEY_TAG},
-    },
+    crypto::encryption::v1::{Nonce, ROOT_KEY_TAG},
     db::{self, models, schema},
 };
 
 use diesel::{QueryDsl, SelectableHelper};
 use diesel_async::RunQueryDsl;
 
-const TEST_AAD: &[u8] = b"test-aad";
-
 #[tokio::test]
 #[test_log::test]
-async fn bootstrap() {
+async fn test_bootstrap() {
     let db = db::create_test_pool().await;
     let mut actor = Vault::new(db.clone(), GlobalActors::spawn_message_bus())
         .await
         .unwrap();
 
-    let seal_key = KeyCell::from([0u8; 32]);
-    actor.bootstrap(seal_key, None).await.unwrap();
+    let seal_key = SafeCell::new(b"test-seal-key".to_vec());
+    actor.bootstrap(seal_key).await.unwrap();
 
     let mut conn = db.get().await.unwrap();
     let row: models::RootKeyHistory = schema::root_key_history::table
@@ -44,25 +39,25 @@ async fn bootstrap() {
 
 #[tokio::test]
 #[test_log::test]
-async fn bootstrap_rejects_double() {
+async fn test_bootstrap_rejects_double() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
-    let seal_key2 = KeyCell::from([0u8; 32]);
-    let err = actor.bootstrap(seal_key2, None).await.unwrap_err();
+    let seal_key2 = SafeCell::new(b"test-seal-key".to_vec());
+    let err = actor.bootstrap(seal_key2).await.unwrap_err();
     assert!(matches!(err, Error::AlreadyBootstrapped));
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn create_new_before_bootstrap_fails() {
+async fn test_create_new_before_bootstrap_fails() {
     let db = db::create_test_pool().await;
     let mut actor = Vault::new(db, GlobalActors::spawn_message_bus())
         .await
         .unwrap();
 
     let err = actor
-        .create_new(SafeCell::new(b"data".to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(b"data".to_vec()))
         .await
         .unwrap_err();
     assert!(matches!(err, Error::NotBootstrapped));
@@ -70,19 +65,19 @@ async fn create_new_before_bootstrap_fails() {
 
 #[tokio::test]
 #[test_log::test]
-async fn decrypt_before_bootstrap_fails() {
+async fn test_decrypt_before_bootstrap_fails() {
     let db = db::create_test_pool().await;
     let mut actor = Vault::new(db, GlobalActors::spawn_message_bus())
         .await
         .unwrap();
 
-    let err = actor.decrypt(1, TEST_AAD.to_vec()).await.unwrap_err();
+    let err = actor.decrypt(1).await.unwrap_err();
     assert!(matches!(err, Error::NotBootstrapped));
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn new_restores_sealed_state() {
+async fn test_new_restores_sealed_state() {
     let db = db::create_test_pool().await;
     let actor = common::bootstrapped_vault(&db).await;
     drop(actor);
@@ -90,19 +85,19 @@ async fn new_restores_sealed_state() {
     let mut actor2 = Vault::new(db, GlobalActors::spawn_message_bus())
         .await
         .unwrap();
-    let err = actor2.decrypt(1, TEST_AAD.to_vec()).await.unwrap_err();
+    let err = actor2.decrypt(1).await.unwrap_err();
     assert!(matches!(err, Error::Sealed));
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn unseal_correct_password() {
+async fn test_unseal_correct_password() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
     let plaintext = b"survive a restart";
     let aead_id = actor
-        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(plaintext.to_vec()))
         .await
         .unwrap();
     drop(actor);
@@ -110,22 +105,22 @@ async fn unseal_correct_password() {
     let mut actor = Vault::new(db.clone(), GlobalActors::spawn_message_bus())
         .await
         .unwrap();
-    let seal_key = KeyCell::from([0u8; 32]);
+    let seal_key = SafeCell::new(b"test-seal-key".to_vec());
     actor.try_unseal(seal_key).await.unwrap();
 
-    let mut decrypted = actor.decrypt(aead_id, TEST_AAD.to_vec()).await.unwrap();
+    let mut decrypted = actor.decrypt(aead_id).await.unwrap();
     assert_eq!(*decrypted.read(), plaintext);
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn unseal_wrong_then_correct_password() {
+async fn test_unseal_wrong_then_correct_password() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
     let plaintext = b"important data";
     let aead_id = actor
-        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(plaintext.to_vec()))
         .await
         .unwrap();
     drop(actor);
@@ -134,13 +129,13 @@ async fn unseal_wrong_then_correct_password() {
         .await
         .unwrap();
 
-    let bad_key = KeyCell::from([1u8; 32]);
+    let bad_key = SafeCell::new(b"wrong-password".to_vec());
     let err = actor.try_unseal(bad_key).await.unwrap_err();
     assert!(matches!(err, Error::InvalidKey));
 
-    let good_key = KeyCell::from([0u8; 32]);
+    let good_key = SafeCell::new(b"test-seal-key".to_vec());
     actor.try_unseal(good_key).await.unwrap();
 
-    let mut decrypted = actor.decrypt(aead_id, TEST_AAD.to_vec()).await.unwrap();
+    let mut decrypted = actor.decrypt(aead_id).await.unwrap();
     assert_eq!(*decrypted.read(), plaintext);
 }

server/crates/arbiter-server/tests/vault/storage.rs

@@ -10,47 +10,45 @@ use diesel::{ExpressionMethods as _, QueryDsl, SelectableHelper, dsl::update};
 use diesel_async::RunQueryDsl;
 use std::collections::HashSet;
 
-const TEST_AAD: &[u8] = b"test-aad";
-
 #[tokio::test]
 #[test_log::test]
-async fn create_decrypt_roundtrip() {
+async fn test_create_decrypt_roundtrip() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
     let plaintext = b"hello arbiter";
     let aead_id = actor
-        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(plaintext.to_vec()))
         .await
         .unwrap();
 
-    let mut decrypted = actor.decrypt(aead_id, TEST_AAD.to_vec()).await.unwrap();
+    let mut decrypted = actor.decrypt(aead_id).await.unwrap();
     assert_eq!(*decrypted.read(), plaintext);
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn decrypt_nonexistent_returns_not_found() {
+async fn test_decrypt_nonexistent_returns_not_found() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
-    let err = actor.decrypt(9999, TEST_AAD.to_vec()).await.unwrap_err();
+    let err = actor.decrypt(9999).await.unwrap_err();
     assert!(matches!(err, Error::NotFound));
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn ciphertext_differs_across_entries() {
+async fn test_ciphertext_differs_across_entries() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
     let plaintext = b"same content";
     let id1 = actor
-        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(plaintext.to_vec()))
         .await
         .unwrap();
     let id2 = actor
-        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(plaintext.to_vec()))
         .await
         .unwrap();
 
@@ -70,22 +68,22 @@ async fn ciphertext_differs_across_entries() {
 
     assert_ne!(row1.ciphertext, row2.ciphertext);
 
-    let mut d1 = actor.decrypt(id1, TEST_AAD.to_vec()).await.unwrap();
-    let mut d2 = actor.decrypt(id2, TEST_AAD.to_vec()).await.unwrap();
+    let mut d1 = actor.decrypt(id1).await.unwrap();
+    let mut d2 = actor.decrypt(id2).await.unwrap();
     assert_eq!(*d1.read(), plaintext);
     assert_eq!(*d2.read(), plaintext);
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn nonce_never_reused() {
+async fn test_nonce_never_reused() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
     let n = 5;
     for i in 0..n {
         actor
-            .create_new(SafeCell::new(format!("secret {i}").into_bytes()), TEST_AAD.to_vec())
+            .create_new(SafeCell::new(format!("secret {i}").into_bytes()))
             .await
             .unwrap();
     }
@@ -139,7 +137,7 @@ async fn broken_db_nonce_format_fails_closed() {
     drop(conn);
 
     let err = actor
-        .create_new(SafeCell::new(b"must fail".to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(b"must fail".to_vec()))
         .await
         .unwrap_err();
     assert!(matches!(err, Error::BrokenDatabase));
@@ -147,7 +145,7 @@ async fn broken_db_nonce_format_fails_closed() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
     let id = actor
-        .create_new(SafeCell::new(b"decrypt target".to_vec()), TEST_AAD.to_vec())
+        .create_new(SafeCell::new(b"decrypt target".to_vec()))
         .await
         .unwrap();
     let mut conn = db.get().await.unwrap();
@@ -158,6 +156,6 @@ async fn broken_db_nonce_format_fails_closed() {
         .unwrap();
     drop(conn);
 
-    let err = actor.decrypt(id, TEST_AAD.to_vec()).await.unwrap_err();
+    let err = actor.decrypt(id).await.unwrap_err();
     assert!(matches!(err, Error::BrokenDatabase));
 }