fix(errors)!: forbid interpolated details in wire-facing internal errors

Reviewed-on: #95

app/.dart_tool/extension_discovery/README.md

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+Extension Discovery Cache
+=========================
+
+This folder is used by `package:extension_discovery` to cache lists of
+packages that contains extensions for other packages.
+
+DO NOT USE THIS FOLDER
+----------------------
+
+ * Do not read (or rely) the contents of this folder.
+ * Do write to this folder.
+
+If you're interested in the lists of extensions stored in this folder use the
+API offered by package `extension_discovery` to get this information.
+
+If this package doesn't work for your use-case, then don't try to read the
+contents of this folder. It may change, and will not remain stable.
+
+Use package `extension_discovery`
+---------------------------------
+
+If you want to access information from this folder.
+
+Feel free to delete this folder
+-------------------------------
+
+Files in this folder act as a cache, and the cache is discarded if the files
+are older than the modification time of `.dart_tool/package_config.json`.
+
+Hence, it should never be necessary to clear this cache manually, if you find a
+need to do please file a bug.

app/.dart_tool/extension_discovery/vs_code.json

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+{"version":2,"entries":[{"package":"app","rootUri":"../","packageUri":"lib/"}]}

app/.dart_tool/package_config.json

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+{
+  "configVersion": 2,
+  "packages": [
+    {
+      "name": "async",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/async-2.13.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "boolean_selector",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/boolean_selector-2.1.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "characters",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/characters-1.4.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "clock",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/clock-1.1.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "collection",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/collection-1.19.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "cupertino_icons",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/cupertino_icons-1.0.8",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "fake_async",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/fake_async-1.3.3",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "flutter",
+      "rootUri": "file:///Users/kaska/.local/share/mise/installs/flutter/3.38.9-stable/packages/flutter",
+      "packageUri": "lib/",
+      "languageVersion": "3.8"
+    },
+    {
+      "name": "flutter_lints",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/flutter_lints-6.0.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.8"
+    },
+    {
+      "name": "flutter_test",
+      "rootUri": "file:///Users/kaska/.local/share/mise/installs/flutter/3.38.9-stable/packages/flutter_test",
+      "packageUri": "lib/",
+      "languageVersion": "3.8"
+    },
+    {
+      "name": "leak_tracker",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/leak_tracker-11.0.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.2"
+    },
+    {
+      "name": "leak_tracker_flutter_testing",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/leak_tracker_flutter_testing-3.0.10",
+      "packageUri": "lib/",
+      "languageVersion": "3.2"
+    },
+    {
+      "name": "leak_tracker_testing",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/leak_tracker_testing-3.0.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.2"
+    },
+    {
+      "name": "lints",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/lints-6.1.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.8"
+    },
+    {
+      "name": "matcher",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/matcher-0.12.17",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "material_color_utilities",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/material_color_utilities-0.11.1",
+      "packageUri": "lib/",
+      "languageVersion": "2.17"
+    },
+    {
+      "name": "meta",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/meta-1.17.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.5"
+    },
+    {
+      "name": "path",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/path-1.9.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "sky_engine",
+      "rootUri": "file:///Users/kaska/.local/share/mise/installs/flutter/3.38.9-stable/bin/cache/pkg/sky_engine",
+      "packageUri": "lib/",
+      "languageVersion": "3.8"
+    },
+    {
+      "name": "source_span",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/source_span-1.10.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "stack_trace",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/stack_trace-1.12.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.4"
+    },
+    {
+      "name": "stream_channel",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/stream_channel-2.1.4",
+      "packageUri": "lib/",
+      "languageVersion": "3.3"
+    },
+    {
+      "name": "string_scanner",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/string_scanner-1.4.1",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "term_glyph",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/term_glyph-1.2.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "test_api",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/test_api-0.7.7",
+      "packageUri": "lib/",
+      "languageVersion": "3.5"
+    },
+    {
+      "name": "vector_math",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/vector_math-2.2.0",
+      "packageUri": "lib/",
+      "languageVersion": "3.1"
+    },
+    {
+      "name": "vm_service",
+      "rootUri": "file:///Users/kaska/.pub-cache/hosted/pub.dev/vm_service-15.0.2",
+      "packageUri": "lib/",
+      "languageVersion": "3.5"
+    },
+    {
+      "name": "app",
+      "rootUri": "../",
+      "packageUri": "lib/",
+      "languageVersion": "3.10"
+    }
+  ],
+  "generator": "pub",
+  "generatorVersion": "3.10.8",
+  "flutterRoot": "file:///Users/kaska/.local/share/mise/installs/flutter/3.38.9-stable",
+  "flutterVersion": "3.38.9",
+  "pubCache": "file:///Users/kaska/.pub-cache"
+}

app/.dart_tool/package_graph.json

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+{
+  "roots": [
+    "app"
+  ],
+  "packages": [
+    {
+      "name": "app",
+      "version": "1.0.0+1",
+      "dependencies": [
+        "cupertino_icons",
+        "flutter"
+      ],
+      "devDependencies": [
+        "flutter_lints",
+        "flutter_test"
+      ]
+    },
+    {
+      "name": "flutter_lints",
+      "version": "6.0.0",
+      "dependencies": [
+        "lints"
+      ]
+    },
+    {
+      "name": "flutter_test",
+      "version": "0.0.0",
+      "dependencies": [
+        "clock",
+        "collection",
+        "fake_async",
+        "flutter",
+        "leak_tracker_flutter_testing",
+        "matcher",
+        "meta",
+        "path",
+        "stack_trace",
+        "stream_channel",
+        "test_api",
+        "vector_math"
+      ]
+    },
+    {
+      "name": "cupertino_icons",
+      "version": "1.0.8",
+      "dependencies": []
+    },
+    {
+      "name": "flutter",
+      "version": "0.0.0",
+      "dependencies": [
+        "characters",
+        "collection",
+        "material_color_utilities",
+        "meta",
+        "sky_engine",
+        "vector_math"
+      ]
+    },
+    {
+      "name": "lints",
+      "version": "6.1.0",
+      "dependencies": []
+    },
+    {
+      "name": "stream_channel",
+      "version": "2.1.4",
+      "dependencies": [
+        "async"
+      ]
+    },
+    {
+      "name": "meta",
+      "version": "1.17.0",
+      "dependencies": []
+    },
+    {
+      "name": "collection",
+      "version": "1.19.1",
+      "dependencies": []
+    },
+    {
+      "name": "leak_tracker_flutter_testing",
+      "version": "3.0.10",
+      "dependencies": [
+        "flutter",
+        "leak_tracker",
+        "leak_tracker_testing",
+        "matcher",
+        "meta"
+      ]
+    },
+    {
+      "name": "vector_math",
+      "version": "2.2.0",
+      "dependencies": []
+    },
+    {
+      "name": "stack_trace",
+      "version": "1.12.1",
+      "dependencies": [
+        "path"
+      ]
+    },
+    {
+      "name": "clock",
+      "version": "1.1.2",
+      "dependencies": []
+    },
+    {
+      "name": "fake_async",
+      "version": "1.3.3",
+      "dependencies": [
+        "clock",
+        "collection"
+      ]
+    },
+    {
+      "name": "path",
+      "version": "1.9.1",
+      "dependencies": []
+    },
+    {
+      "name": "matcher",
+      "version": "0.12.17",
+      "dependencies": [
+        "async",
+        "meta",
+        "stack_trace",
+        "term_glyph",
+        "test_api"
+      ]
+    },
+    {
+      "name": "test_api",
+      "version": "0.7.7",
+      "dependencies": [
+        "async",
+        "boolean_selector",
+        "collection",
+        "meta",
+        "source_span",
+        "stack_trace",
+        "stream_channel",
+        "string_scanner",
+        "term_glyph"
+      ]
+    },
+    {
+      "name": "sky_engine",
+      "version": "0.0.0",
+      "dependencies": []
+    },
+    {
+      "name": "material_color_utilities",
+      "version": "0.11.1",
+      "dependencies": [
+        "collection"
+      ]
+    },
+    {
+      "name": "characters",
+      "version": "1.4.0",
+      "dependencies": []
+    },
+    {
+      "name": "async",
+      "version": "2.13.0",
+      "dependencies": [
+        "collection",
+        "meta"
+      ]
+    },
+    {
+      "name": "leak_tracker_testing",
+      "version": "3.0.2",
+      "dependencies": [
+        "leak_tracker",
+        "matcher",
+        "meta"
+      ]
+    },
+    {
+      "name": "leak_tracker",
+      "version": "11.0.2",
+      "dependencies": [
+        "clock",
+        "collection",
+        "meta",
+        "path",
+        "vm_service"
+      ]
+    },
+    {
+      "name": "term_glyph",
+      "version": "1.2.2",
+      "dependencies": []
+    },
+    {
+      "name": "string_scanner",
+      "version": "1.4.1",
+      "dependencies": [
+        "source_span"
+      ]
+    },
+    {
+      "name": "source_span",
+      "version": "1.10.2",
+      "dependencies": [
+        "collection",
+        "path",
+        "term_glyph"
+      ]
+    },
+    {
+      "name": "boolean_selector",
+      "version": "2.1.2",
+      "dependencies": [
+        "source_span",
+        "string_scanner"
+      ]
+    },
+    {
+      "name": "vm_service",
+      "version": "15.0.2",
+      "dependencies": []
+    }
+  ],
+  "configVersion": 1
+}

app/.dart_tool/version

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+3.38.9

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

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+# 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.toml

@@ -22,5 +22,3 @@ run = '''
 dart pub global activate protoc_plugin && \
 protoc --dart_out=grpc:useragent/lib/proto --proto_path=protobufs/ $(find protobufs -name '*.proto' | sort)
 '''
-
-[tasks.generate_schema]

protobufs/operator.proto

@@ -4,28 +4,25 @@ package arbiter.operator;
 
 import "operator/auth.proto";
 import "operator/evm.proto";
-import "operator/governance.proto";
 import "operator/sdk_client.proto";
 import "operator/vault/vault.proto";
 
 message OperatorRequest {
   int32 id = 16;
   oneof payload {
-    auth.Request            auth        = 1;
+    auth.Request auth = 1;
-    vault.Request           vault       = 2;
+    vault.Request vault = 2;
-    evm.Request             evm         = 3;
+    evm.Request evm = 3;
-    sdk_client.Request      sdk_client  = 4;
+    sdk_client.Request sdk_client = 4;
-    governance.Request      governance  = 5;
   }
 }
 
 message OperatorResponse {
   optional int32 id = 16;
   oneof payload {
-    auth.Response           auth        = 1;
+    auth.Response auth = 1;
-    vault.Response          vault       = 2;
+    vault.Response vault = 2;
-    evm.Response            evm         = 3;
+    evm.Response evm = 3;
-    sdk_client.Response     sdk_client  = 4;
+    sdk_client.Response sdk_client = 4;
-    governance.Response     governance  = 5;
   }
 }

protobufs/operator/governance.proto

@@ -1,136 +0,0 @@
-syntax = "proto3";
-
-package arbiter.operator.governance;
-
-message Request {
-  oneof payload {
-    CreateProposalRequest create = 1;
-    CastVoteRequest       vote   = 2;
-    QueryPendingRequest   query  = 3;
-  }
-}
-
-message CreateProposalRequest {
-  oneof kind {
-    ApproveSdkClientPayload         approve_sdk_client          = 1;
-    GrantWalletAccessPayload        grant_wallet_access         = 3;
-    ApproveServerUpdatePayload      approve_server_update       = 4;
-    ReplaceOperatorPayload          replace_operator            = 5;
-    UpdateShamirParametersPayload   update_shamir_parameters    = 6;
-    ApprovePersistentGrantPayload   approve_persistent_grant    = 7;
-    ApproveOneOffTransactionPayload approve_one_off_transaction = 8;
-  }
-  optional uint32 ttl_secs = 2;
-}
-
-message ReplaceOperatorPayload {
-  int32 old_operator_id = 1;
-  bytes new_pubkey      = 2;
-}
-
-message UpdateShamirParametersPayload {
-  uint32 new_n = 1;
-}
-
-message ApproveServerUpdatePayload {}
-
-message ApproveSdkClientPayload {
-  int32 client_id = 1;
-}
-
-message GrantWalletAccessPayload {
-  int32 wallet_id = 1;
-  int32 client_id = 2;
-}
-
-message CastVoteRequest {
-  int32 proposal_id = 1;
-  bool  approve     = 2;
-  bytes signature   = 3;
-}
-
-message QueryPendingRequest {}
-
-message Response {
-  oneof payload {
-    CreateProposalResponse created = 1;
-    VoteResponse           voted   = 2;
-    QueryPendingResponse   pending = 3;
-  }
-}
-
-message CreateProposalResponse {
-  int32 proposal_id = 1;
-}
-
-message VoteResponse {
-  VoteOutcome outcome = 1;
-}
-
-enum VoteOutcome {
-  VOTE_OUTCOME_UNSPECIFIED = 0;
-  VOTE_OUTCOME_PENDING     = 1;
-  VOTE_OUTCOME_APPROVED    = 2;
-  VOTE_OUTCOME_REJECTED    = 3;
-}
-
-message ProposalSummary {
-  int32  id            = 1;
-  string kind          = 2;
-  int32  initiator_id  = 3;
-  int64  expires_at    = 4;
-  int64  approve_count = 5;
-  int64  reject_count  = 6;
-}
-
-message QueryPendingResponse {
-  repeated ProposalSummary proposals = 1;
-}
-
-message TransactionRateLimitProto {
-  uint32 count       = 1;
-  int64  window_secs = 2;
-}
-
-message VolumeLimitProto {
-  bytes max_volume  = 1;
-  int64 window_secs = 2;
-}
-
-message EtherTransferSpecProto {
-  repeated bytes   targets = 1;
-  VolumeLimitProto limit   = 2;
-}
-
-message TokenTransferSpecProto {
-  bytes                     token_contract = 1;
-  optional bytes            target         = 2;
-  repeated VolumeLimitProto volume_limits  = 3;
-}
-
-message ApproveOneOffTransactionPayload {
-  int32  client_id                = 1;
-  bytes  wallet_address           = 2;
-  uint64 chain_id                 = 3;
-  uint64 nonce                    = 4;
-  uint64 gas_limit                = 5;
-  bytes  max_fee_per_gas          = 6;
-  bytes  max_priority_fee_per_gas = 7;
-  bytes  to                       = 8;
-  bytes  value                    = 9;
-  bytes  input                    = 10;
-}
-
-message ApprovePersistentGrantPayload {
-  int32                              wallet_access_id         = 1;
-  uint64                             chain_id                 = 2;
-  optional int64                     valid_from_secs          = 3;
-  optional int64                     valid_until_secs         = 4;
-  optional bytes                     max_gas_fee_per_gas      = 5;
-  optional bytes                     max_priority_fee_per_gas = 6;
-  optional TransactionRateLimitProto rate_limit               = 7;
-  oneof specific {
-    EtherTransferSpecProto ether_transfer = 8;
-    TokenTransferSpecProto token_transfer = 9;
-  }
-}

protobufs/operator/vault/bootstrap.proto

@@ -8,35 +8,15 @@ message BootstrapEncryptedKey {
   bytes associated_data = 3;
 }
 
-message DeclareCommittee {
-  uint32 count          = 1;
-  uint32 recovery_count = 2;
-}
-
-message ContributePassphrase {
-  bytes passphrase = 1;
-}
-
-message ContributeRecoveryPassphrase {
-  int32 recovery_operator_id = 1;
-  bytes passphrase            = 2;
-}
-
 enum BootstrapResult {
   BOOTSTRAP_RESULT_UNSPECIFIED = 0;
   BOOTSTRAP_RESULT_SUCCESS = 1;
   BOOTSTRAP_RESULT_ALREADY_BOOTSTRAPPED = 2;
   BOOTSTRAP_RESULT_INVALID_KEY = 3;
-  BOOTSTRAP_RESULT_AWAITING_CONTRIBUTIONS = 4;
 }
 
 message Request {
-  oneof payload {
+  BootstrapEncryptedKey encrypted_key = 2;
-    BootstrapEncryptedKey        encrypted_key                    = 2;
-    DeclareCommittee             declare_committee                = 3;
-    ContributePassphrase         contribute_passphrase            = 4;
-    ContributeRecoveryPassphrase contribute_recovery_passphrase   = 5;
-  }
 }
 
 message Response {

protobufs/operator/vault/rekey.proto

@@ -1,30 +0,0 @@
-syntax = "proto3";
-
-package arbiter.operator.vault.rekey;
-
-message ContributePassphrase {
-  bytes passphrase = 1;
-}
-
-message ContributeRecoveryPassphrase {
-  int32 recovery_operator_id = 1;
-  bytes passphrase           = 2;
-}
-
-enum RekeyResult {
-  REKEY_RESULT_UNSPECIFIED            = 0;
-  REKEY_RESULT_SUCCESS                = 1;
-  REKEY_RESULT_AWAITING_CONTRIBUTIONS = 2;
-  REKEY_RESULT_NOT_IN_PROGRESS        = 3;
-}
-
-message Request {
-  oneof payload {
-    ContributePassphrase         contribute_passphrase          = 1;
-    ContributeRecoveryPassphrase contribute_recovery_passphrase = 2;
-  }
-}
-
-message Response {
-  RekeyResult result = 1;
-}

protobufs/operator/vault/unseal.proto

@@ -15,29 +15,18 @@ message UnsealEncryptedKey {
   bytes associated_data = 3;
 }
 
-message ContributePassphrase {
-  bytes passphrase = 1;
-}
-
-message ContributeRecoveryPassphrase {
-  int32 recovery_operator_id = 1;
-  bytes passphrase            = 2;
-}
-
 enum UnsealResult {
   UNSEAL_RESULT_UNSPECIFIED = 0;
   UNSEAL_RESULT_SUCCESS = 1;
   UNSEAL_RESULT_INVALID_KEY = 2;
   UNSEAL_RESULT_UNBOOTSTRAPPED = 3;
-  UNSEAL_RESULT_AWAITING_CONTRIBUTIONS = 4;
+  UNSEAL_RESULT_LOCKED_OUT = 4;
 }
 
 message Request {
   oneof payload {
-    UnsealStart                  start                          = 1;
+    UnsealStart start = 1;
-    UnsealEncryptedKey           encrypted_key                  = 2;
+    UnsealEncryptedKey encrypted_key = 2;
-    ContributePassphrase         contribute_passphrase          = 3;
-    ContributeRecoveryPassphrase contribute_recovery_passphrase = 4;
   }
 }
 

protobufs/operator/vault/vault.proto

@@ -5,23 +5,20 @@ package arbiter.operator.vault;
 import "google/protobuf/empty.proto";
 import "shared/vault.proto";
 import "operator/vault/bootstrap.proto";
-import "operator/vault/rekey.proto";
 import "operator/vault/unseal.proto";
 
 message Request {
   oneof payload {
     google.protobuf.Empty query_state = 1;
-    unseal.Request        unseal      = 2;
+    unseal.Request unseal = 2;
-    bootstrap.Request     bootstrap   = 3;
+    bootstrap.Request bootstrap = 3;
-    rekey.Request         rekey       = 4;
   }
 }
 
 message Response {
   oneof payload {
-    arbiter.shared.VaultState state     = 1;
+    arbiter.shared.VaultState state = 1;
-    unseal.Response           unseal    = 2;
+    unseal.Response unseal = 2;
-    bootstrap.Response        bootstrap = 3;
+    bootstrap.Response bootstrap = 3;
-    rekey.Response            rekey     = 4;
   }
 }

protobufs/shared/vault.proto

@@ -5,8 +5,7 @@ package arbiter.shared;
 enum VaultState {
   VAULT_STATE_UNSPECIFIED = 0;
   VAULT_STATE_UNBOOTSTRAPPED = 1;
-  VAULT_STATE_BOOSTRAPPING = 2;
+  VAULT_STATE_SEALED = 2;
-  VAULT_STATE_SEALED = 3;
+  VAULT_STATE_UNSEALED = 3;
-  VAULT_STATE_UNSEALED = 4;
+  VAULT_STATE_ERROR = 4;
-  VAULT_STATE_ERROR = 5;
 }

server/Cargo.lock

@@ -2,15 +2,6 @@
 # It is not intended for manual editing.
 version = 4
 
-[[package]]
-name = "addr2line"
-version = "0.25.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b5d307320b3181d6d7954e663bd7c774a838b8220fe0593c86d9fb09f498b4b"
-dependencies = [
- "gimli",
-]
-
 [[package]]
 name = "adler2"
 version = "2.0.1"
@@ -771,6 +762,7 @@ dependencies = [
  "proptest",
  "prost-types",
  "rand 0.10.1",
+ "rand_core 0.10.1",
  "rcgen",
  "restructed",
  "rstest",
@@ -1165,30 +1157,6 @@ dependencies = [
  "tower-service",
 ]
 
-[[package]]
-name = "backtrace"
-version = "0.3.76"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb531853791a215d7c62a30daf0dde835f381ab5de4589cfe7c649d2cbe92bd6"
-dependencies = [
- "addr2line",
- "cfg-if",
- "libc",
- "miniz_oxide",
- "object",
- "rustc-demangle",
- "windows-link",
-]
-
-[[package]]
-name = "backtrace-ext"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "537beee3be4a18fb023b570f80e3ae28003db9167a751266b259926e25539d50"
-dependencies = [
- "backtrace",
-]
-
 [[package]]
 name = "base16ct"
 version = "0.2.0"
@@ -2364,12 +2332,6 @@ dependencies = [
  "wasip3",
 ]
 
-[[package]]
-name = "gimli"
-version = "0.32.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e629b9b98ef3dd8afe6ca2bd0f89306cec16d43d907889945bc5d6687f2f13c7"
-
 [[package]]
 name = "glob"
 version = "0.3.3"
@@ -2827,12 +2789,6 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "is_ci"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7655c9839580ee829dfacba1d1278c2b7883e50a277ff7541299489d6bdfdc45"
-
 [[package]]
 name = "itertools"
 version = "0.10.5"
@@ -3168,18 +3124,9 @@ version = "7.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f98efec8807c63c752b5bd61f862c165c115b0a35685bdcfd9238c7aeb592b7"
 dependencies = [
- "backtrace",
- "backtrace-ext",
  "cfg-if",
  "miette-derive",
- "owo-colors",
+ "unicode-width",
- "serde",
- "supports-color",
- "supports-hyperlinks",
- "supports-unicode",
- "terminal_size",
- "textwrap",
- "unicode-width 0.1.14",
 ]
 
 [[package]]
@@ -3401,15 +3348,6 @@ dependencies = [
  "smallvec",
 ]
 
-[[package]]
-name = "object"
-version = "0.37.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ff76201f031d8863c38aa7f905eca4f53abbfa15f609db4277d44cd8938f33fe"
-dependencies = [
- "memchr",
-]
-
 [[package]]
 name = "oid-registry"
 version = "0.8.1"
@@ -3437,12 +3375,6 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c87def4c32ab89d880effc9e097653c8da5d6ef28e6b539d313baaacfbafcbe"
 
-[[package]]
-name = "owo-colors"
-version = "4.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d211803b9b6b570f68772237e415a029d5a50c65d382910b879fb19d3271f94d"
-
 [[package]]
 name = "parity-scale-codec"
 version = "3.7.5"
@@ -4246,12 +4178,6 @@ version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "48fd7bd8a6377e15ad9d42a8ec25371b94ddc67abe7c8b9127bec79bebaaae18"
 
-[[package]]
-name = "rustc-demangle"
-version = "0.1.27"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b50b8869d9fc858ce7266cce0194bd74df58b9d0e3f6df3a9fc8eb470d95c09d"
-
 [[package]]
 name = "rustc-hash"
 version = "2.1.2"
@@ -4891,27 +4817,6 @@ version = "2.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 
-[[package]]
-name = "supports-color"
-version = "3.0.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c64fc7232dd8d2e4ac5ce4ef302b1d81e0b80d055b9d77c7c4f51f6aa4c867d6"
-dependencies = [
- "is_ci",
-]
-
-[[package]]
-name = "supports-hyperlinks"
-version = "3.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e396b6523b11ccb83120b115a0b7366de372751aa6edf19844dfb13a6af97e91"
-
-[[package]]
-name = "supports-unicode"
-version = "3.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7401a30af6cb5818bb64852270bb722533397edcfc7344954a38f420819ece2"
-
 [[package]]
 name = "syn"
 version = "1.0.109"
@@ -4985,16 +4890,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "terminal_size"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "230a1b821ccbd75b185820a1f1ff7b14d21da1e442e22c0863ea5f08771a8874"
-dependencies = [
- "rustix",
- "windows-sys 0.61.2",
-]
-
 [[package]]
 name = "test-log"
 version = "0.2.20"
@@ -5026,16 +4921,6 @@ dependencies = [
  "test-log-core",
 ]
 
-[[package]]
-name = "textwrap"
-version = "0.16.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c13547615a44dc9c452a8a534638acdf07120d4b6847c8178705da06306a3057"
-dependencies = [
- "unicode-linebreak",
- "unicode-width 0.2.2",
-]
-
 [[package]]
 name = "thiserror"
 version = "2.0.18"
@@ -5475,12 +5360,6 @@ version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 
-[[package]]
-name = "unicode-linebreak"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3b09c83c3c29d37506a3e260c08c03743a6bb66a9cd432c6934ab501a190571f"
-
 [[package]]
 name = "unicode-segmentation"
 version = "1.13.2"
@@ -5493,12 +5372,6 @@ version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
 
-[[package]]
-name = "unicode-width"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4ac048d71ede7ee76d585517add45da530660ef4390e49b098733c6e897f254"
-
 [[package]]
 name = "unicode-xid"
 version = "0.2.6"
@@ -6261,18 +6134,18 @@ dependencies = [
 
 [[package]]
 name = "zeroize"
-version = "1.8.2"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b97154e67e32c85465826e8bcc1c59429aaaf107c1e4a9e53c8d8ccd5eff88d0"
+checksum = "e13c156562582aa81c60cb29407084cdb54c4164760106ab78e6c5b0858cf64e"
 dependencies = [
  "zeroize_derive",
 ]
 
 [[package]]
 name = "zeroize_derive"
-version = "1.4.3"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85a5b4158499876c763cb03bc4e49185d3cccbabb15b33c627f7884f43db852e"
+checksum = "3c50655cbb0fe3fc43170059e702f1ce5e19b84cec58dc87b037a09935c2f328"
 dependencies = [
  "proc-macro2",
  "quote",

server/Cargo.toml

@@ -15,12 +15,16 @@ k256 = { version = "0.13.4", features = ["ecdsa", "pkcs8"] }
 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"] }
+# `derive` only: nothing renders a miette Report yet, so `fancy` would drag the
+# terminal-formatting stack (owo-colors, supports-color, textwrap, terminal_size)
+# into the headless daemon. A CLI that wants pretty output enables `fancy` itself.
+miette = "7.6.0"
 ml-dsa = { version = "0.1.0-rc.9", features = ["zeroize"] }
 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 }
@@ -76,6 +80,7 @@ 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
 
 # restriction lints
 alloc_instead_of_core = "warn"

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

@@ -23,6 +23,7 @@ use arbiter_proto::{
 use chrono::DateTime;
 
 #[derive(Debug, thiserror::Error)]
+#[non_exhaustive]
 pub enum AuthError {
     #[error("Server sent invalid auth challenge")]
     InvalidChallenge,
@@ -100,7 +101,7 @@ async fn send_auth_challenge_solution(
     key: &SigningKey,
     challenge: AuthChallenge,
 ) -> Result<(), AuthError> {
-    let timestamp = DateTime::from_timestamp_nanos(challenge.timestamp_nanos as i64);
+    let timestamp = DateTime::from_timestamp_nanos(challenge.timestamp_nanos.cast_signed());
     let challenge = authn::AuthChallenge {
         nonce: *challenge
             .random

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

@@ -17,6 +17,7 @@ use tokio_stream::wrappers::ReceiverStream;
 use tonic::transport::ClientTlsConfig;
 
 #[derive(Debug, thiserror::Error)]
+#[non_exhaustive]
 pub enum ArbiterClientError {
     #[error("Authentication error")]
     Authentication(#[from] AuthError),

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

@@ -4,6 +4,7 @@ use arbiter_proto::home_path;
 use std::path::{Path, PathBuf};
 
 #[derive(Debug, thiserror::Error)]
+#[non_exhaustive]
 pub enum StorageError {
     #[error("Invalid signing key length in storage: expected {expected} bytes, got {actual} bytes")]
     InvalidKeyLength { expected: usize, actual: usize },

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

@@ -11,6 +11,7 @@ pub fn next_request_id() -> i32 {
 }
 
 #[derive(Debug, thiserror::Error)]
+#[non_exhaustive]
 pub enum ClientSignError {
     #[error("Transport channel closed")]
     ChannelClosed,

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

@@ -30,6 +30,7 @@ impl Display for ArbiterUrl {
 }
 
 #[derive(Debug, thiserror::Error, miette::Diagnostic)]
+#[non_exhaustive]
 pub enum Error {
     #[error("Invalid URL scheme, expected '{ARBITER_URL_SCHEME}://'")]
     #[diagnostic(

server/crates/arbiter-server/Cargo.toml

@@ -31,6 +31,7 @@ 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

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

@@ -43,24 +43,13 @@ create table if not exists arbiter_settings (
 insert into arbiter_settings (id) values (1) on conflict do nothing;
 -- ensure singleton row exists
 
-create table if not exists operator_identity (
+create table if not exists operator_client (
     id integer not null primary key,
     public_key blob not null,
     created_at integer not null default(unixepoch ('now')),
     updated_at integer not null default(unixepoch ('now'))
 ) STRICT;
-create unique index if not exists uniq_operator_identity_public_key on operator_identity (public_key);
+create unique index if not exists uniq_operator_client_public_key on operator_client (public_key);
-
-create table if not exists operator (
-    id integer primary key references operator_identity(id) on delete restrict, -- same id as operator_identity
-
-    share blob not null,
-    share_nonce blob not null,
-
-    created_at integer not null default(unixepoch ('now')),
-    updated_at integer not null default(unixepoch ('now'))
-
-) STRICT;
 
 create table if not exists client_metadata (
     id integer not null primary key,

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

@@ -1,29 +1,48 @@
 use crate::db::{self, DatabasePool, schema};
+use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
 use arbiter_proto::{BOOTSTRAP_PATH, home_path};
 
 use diesel::QueryDsl;
 use diesel_async::RunQueryDsl;
 use kameo::{Actor, messages};
-use rand::{RngExt, distr::Alphanumeric, make_rng, rngs::StdRng};
+use rand::{RngExt, distr::Alphanumeric, rngs::SysRng};
+use rand_core::UnwrapErr;
+use std::path::{Path, PathBuf};
 use subtle::ConstantTimeEq as _;
 use thiserror::Error;
+use tracing::warn;
 
 const TOKEN_LENGTH: usize = 64;
 
-pub async fn generate_token() -> Result<String, std::io::Error> {
+async fn write_token_file(path: &Path, content: &str) -> Result<(), std::io::Error> {
-    let rng: StdRng = make_rng();
+    tokio::fs::write(path, content.as_bytes()).await?;
 
-    let token = rng.sample_iter(Alphanumeric).take(TOKEN_LENGTH).fold(
+    #[cfg(unix)]
-        String::default(),
+    {
-        |mut accum, char| {
+        use std::os::unix::fs::PermissionsExt as _;
-            accum += char.to_string().as_str();
+        tokio::fs::set_permissions(path, std::fs::Permissions::from_mode(0o600)).await?;
-            accum
+    }
-        },
-    );
 
-    tokio::fs::write(home_path()?.join(BOOTSTRAP_PATH), token.as_str()).await?;
+    Ok(())
+}
 
-    Ok(token)
+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, b) in buf
+            .iter_mut()
+            .zip(UnwrapErr(SysRng).sample_iter(Alphanumeric))
+        {
+            *slot = b;
+        }
+    }
+
+    let token_str = cell.read_inline(|buf| String::from_utf8_lossy(buf.as_ref()).into_owned());
+
+    write_token_file(path, &token_str).await?;
+
+    Ok(cell)
 }
 
 #[derive(Error, Debug)]
@@ -40,7 +59,8 @@ pub enum Error {
 
 #[derive(Actor)]
 pub struct Bootstrapper {
-    token: Option<String>,
+    token: Option<SafeCell<[u8; TOKEN_LENGTH]>>,
+    token_path: Option<PathBuf>,
 }
 
 impl Bootstrapper {
@@ -48,40 +68,43 @@ impl Bootstrapper {
         let row_count: i64 = {
             let mut conn = db.get().await?;
 
-            schema::operator::table
+            schema::operator_client::table
                 .count()
                 .get_result(&mut conn)
                 .await?
         };
 
-        let token = if row_count == 0 {
+        let (token, token_path) = if row_count == 0 {
-            let token = generate_token().await?;
+            let path = home_path()?.join(BOOTSTRAP_PATH);
-            Some(token)
+            let token = generate_token(&path).await?;
+            (Some(token), Some(path))
         } else {
-            None
+            (None, None)
         };
 
-        Ok(Self { token })
+        Ok(Self { token, token_path })
+    }
+}
+
+impl Bootstrapper {
+    fn is_correct_token(&mut self, token: &[u8]) -> bool {
+        self.token.as_mut().is_some_and(|expected| {
+            expected.read_inline(|exp| bool::from(exp.as_ref().ct_eq(token)))
+        })
     }
 }
 
 #[messages]
 impl Bootstrapper {
     #[message]
-    pub fn is_correct_token(&self, token: String) -> bool {
+    pub async fn consume_token(&mut self, token: Vec<u8>) -> bool {
-        self.token.as_ref().is_some_and(|expected| {
+        if self.is_correct_token(&token) {
-            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 consume_token(&mut self, token: String) -> bool {
-        if self.is_correct_token(token) {
             self.token = None;
+            if let Some(path) = self.token_path.take()
+                && let Err(e) = tokio::fs::remove_file(&path).await
+            {
+                warn!(error = ?e, path = ?path, "Failed to delete bootstrap token file after consumption");
+            }
             true
         } else {
             false
@@ -92,7 +115,9 @@ impl Bootstrapper {
 #[messages]
 impl Bootstrapper {
     #[message]
-    pub fn get_token(&self) -> Option<String> {
+    pub fn get_token(&mut self) -> Option<String> {
-        self.token.clone()
+        self.token
+            .as_mut()
+            .map(|cell| cell.read_inline(|buf| String::from_utf8_lossy(buf.as_ref()).into_owned()))
     }
 }

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

@@ -1,9 +1,9 @@
 use crate::{
     actors::vault::{CreateNew, Decrypt, Vault},
-    crypto::integrity,
+    crypto::integrity::{self, Integrable},
     db::{
         DatabaseError, DatabasePool,
-        models::{self, EvmWalletId},
+        models::{self},
         schema,
     },
     evm::{
@@ -25,14 +25,35 @@ 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),
 
@@ -64,6 +85,12 @@ 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>,
@@ -97,26 +124,45 @@ impl EvmActor {
 
         let aead_id: i32 = self
             .vault
-            .ask(CreateNew { plaintext })
+            .ask(CreateNew {
+                plaintext,
+                aad: address.as_slice().to_vec(),
+            })
             .await
             .map_err(|_| Error::VaultSend)?;
 
         let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
-        let wallet_id = insert_into(schema::evm_wallet::table)
+        let wallet_id = conn
-            .values(&models::NewEvmWallet {
+            .exclusive_transaction(async |conn| {
-                address: address.as_slice().to_vec(),
+                let wallet_id: i32 = insert_into(schema::evm_wallet::table)
-                aead_encrypted_id: aead_id,
+                    .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)
             })
-            .returning(schema::evm_wallet::id)
+            .await?;
-            .get_result(&mut conn)
-            .await
-            .map_err(DatabaseError::from)?;
 
         Ok((wallet_id, address))
     }
 
     #[message]
-    pub async fn list_wallets(&self) -> Result<Vec<(EvmWalletId, Address)>, Error> {
+    pub async fn list_wallets(&self) -> Result<Vec<(i32, Address)>, Error> {
         let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
         let rows: Vec<models::EvmWallet> = schema::evm_wallet::table
             .select(models::EvmWallet::as_select())
@@ -160,29 +206,14 @@ impl EvmActor {
     }
 
     #[message]
-    #[expect(clippy::unused_async, reason = "reserved for impl")]
+    pub async fn useragent_delete_grant(
-    pub async fn operator_delete_grant(&mut self, _grant_id: i32) -> Result<(), Error> {
+        &mut self,
-        // let mut conn = self.db.get().await.map_err(DatabaseError::from)?;
+        grant_id: i32,
-        // let vault = self.vault.clone();
+    ) -> Result<(), Error> {
-
+        self.engine
-        // diesel_async::AsyncConnection::transaction(&mut conn, |conn| {
+            .revoke_grant(grant_id)
-        //     Box::pin(async move {
+            .await
-        //         diesel::update(schema::evm_basic_grant::table)
+            .map_err(Error::from)
-        //             .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]
@@ -256,16 +287,51 @@ 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,
+        )
+        .await
+        .map_err(|e| {
+            error!(?e, wallet_id = wallet.id, "EVM wallet integrity check failed");
+            SignTransactionError::Internal
+        })?;
+        drop(conn);
+
+        if attestation != integrity::AttestationStatus::Attested {
+            error!(
+                wallet_id = 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

@@ -11,7 +11,9 @@ use kameo::{
     prelude::{ActorId, ActorRef, ActorStopReason, Context, WeakActorRef},
     reply::ReplySender,
 };
-use std::ops::ControlFlow;
+use std::{ops::ControlFlow, time::Duration};
+
+const APPROVAL_TIMEOUT: Duration = Duration::from_secs(30);
 
 pub struct Args {
     pub client: ClientProfile,
@@ -64,6 +66,14 @@ 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)
     }
 
@@ -104,4 +114,14 @@ 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

@@ -20,6 +20,8 @@ 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>,
 }
 
@@ -27,6 +29,7 @@ impl FlowCoordinator {
     pub fn new(operator_registry: ActorRef<OperatorRegistry>) -> Self {
         Self {
             clients: HashMap::default(),
+            client_ids: HashMap::default(),
             operator_registry,
         }
     }
@@ -48,6 +51,7 @@ 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",
@@ -75,14 +79,28 @@ 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(), actor = "FlowCoordinator", event = "client.connected");
+        info!(id = %actor.id(), client_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/vault/mod.rs

@@ -6,7 +6,7 @@ use crate::{
     },
     db::{
         self,
-        models::{self, RootKeyHistory, RootKeyHistoryId},
+        models::{self, RootKeyHistory},
         schema::{self},
     },
 };
@@ -22,9 +22,10 @@ use hmac::{KeyInit as _, Mac as _};
 use kameo::{Actor, Reply, actor::ActorRef, messages};
 use kameo_actors::message_bus::{MessageBus, Publish};
 use strum::{EnumDiscriminants, IntoDiscriminant};
-use tracing::{error, info};
+use tracing::{error, info, warn};
 
 pub mod events {
+
     #[derive(Clone, Copy)]
     pub struct Bootstrapped;
 
@@ -45,6 +46,8 @@ 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,
@@ -60,10 +63,13 @@ pub enum Error {
 
     #[error("Broken database")]
     BrokenDatabase,
+
+    #[error("Integrity key version mismatch: envelope uses key {envelope}, current key is {current}")]
+    KeyVersionMismatch { envelope: i32, current: i32 },
 }
 
 struct Unsealed {
-    root_key_history_id: RootKeyHistoryId,
+    root_key_history_id: i32,
     root_key: KeyCell,
 }
 
@@ -72,13 +78,14 @@ struct Unsealed {
 enum State {
     #[default]
     Unbootstrapped,
-
     Sealed {
-        root_key_history_id: RootKeyHistoryId,
+        root_key_history_id: i32,
     },
     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.
@@ -88,6 +95,7 @@ pub struct Vault {
     db: db::DatabasePool,
     state: State,
     events: ActorRef<MessageBus>,
+    unseal_failures: u32,
 }
 
 #[messages]
@@ -110,15 +118,12 @@ impl Vault {
             }
         };
 
-        Ok(Self { db, state, events })
+        Ok(Self { db, state, events, unseal_failures: 0 })
     }
 
     // Exclusive transaction to avoid race condtions if multiple vaults write
     // additional layer of protection against nonce-reuse
-    async fn get_new_nonce(
+    async fn get_new_nonce(pool: &db::DatabasePool, root_key_id: i32) -> Result<Nonce, Error> {
-        pool: &db::DatabasePool,
-        root_key_id: RootKeyHistoryId,
-    ) -> Result<Nonce, Error> {
         let mut conn = pool.get().await?;
 
         let nonce = conn
@@ -131,7 +136,7 @@ impl Vault {
 
                 let mut nonce = Nonce::try_from(current_nonce.as_slice()).map_err(|()| {
                     error!(
-                        "Broken database: invalid nonce for root key history id={:#?}",
+                        "Broken database: invalid nonce for root key history id={}",
                         root_key_id
                     );
                     Error::BrokenDatabase
@@ -187,7 +192,7 @@ impl Vault {
         let data_encryption_nonce_bytes = data_encryption_nonce.to_vec();
         let root_key_history_id = conn
             .transaction(async |conn| {
-                let root_key_history_id = insert_into(schema::root_key_history::table)
+                let root_key_history_id: i32 = insert_into(schema::root_key_history::table)
                     .values(&models::NewRootKeyHistory {
                         ciphertext: root_key_ciphertext.clone(),
                         tag: v1::ROOT_KEY_TAG.to_vec(),
@@ -205,9 +210,7 @@ impl Vault {
                     .execute(&mut *conn)
                     .await?;
 
-                Result::<_, diesel::result::Error>::Ok(RootKeyHistoryId::from_raw(
+                Result::<_, diesel::result::Error>::Ok(root_key_history_id)
-                    root_key_history_id,
-                ))
             })
             .await?;
 
@@ -224,6 +227,10 @@ impl Vault {
 
     #[message]
     pub async fn try_unseal(&mut self, seal_key_raw: SafeCell<Vec<u8>>) -> Result<(), Error> {
+        if self.unseal_failures >= MAX_UNSEAL_ATTEMPTS {
+            return Err(Error::LockedOut);
+        }
+
         let State::Sealed {
             root_key_history_id,
         } = &self.state
@@ -256,13 +263,27 @@ impl Vault {
                 Error::BrokenDatabase
             })?;
 
-        seal_key
+        if seal_key
             .decrypt_in_place(&nonce, v1::ROOT_KEY_TAG, &mut root_key)
-            .map_err(|err| {
+            .is_err()
-                error!(?err, "Failed to unseal root key: invalid seal key");
+        {
-                Error::InvalidKey
+            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);
+        }
 
+        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| {
@@ -277,8 +298,10 @@ 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) -> Result<SafeCell<Vec<u8>>, Error> {
+    pub async fn decrypt(&mut self, aead_id: i32, aad: Vec<u8>) -> Result<SafeCell<Vec<u8>>, Error> {
         let Unsealed { root_key, .. } = Self::expect_unsealed(&mut self.state)?;
 
         let row: models::AeadEncrypted = {
@@ -300,13 +323,15 @@ impl Vault {
             Error::BrokenDatabase
         })?;
         let mut output = SafeCell::new(row.ciphertext);
-        root_key.decrypt_in_place(&nonce, v1::TAG, &mut output)?;
+        root_key.decrypt_in_place(&nonce, &aad, &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>>) -> Result<i32, Error> {
+    pub async fn create_new(&mut self, mut plaintext: SafeCell<Vec<u8>>, aad: Vec<u8>) -> Result<i32, Error> {
         let Unsealed {
             root_key,
             root_key_history_id,
@@ -318,7 +343,7 @@ impl Vault {
 
         let mut ciphertext_buffer = plaintext.write();
         let ciphertext_buffer: &mut Vec<u8> = ciphertext_buffer.as_mut();
-        root_key.encrypt_in_place(&nonce, v1::TAG, &mut *ciphertext_buffer)?;
+        root_key.encrypt_in_place(&nonce, &aad, &mut *ciphertext_buffer)?;
 
         let ciphertext = std::mem::take(ciphertext_buffer);
 
@@ -345,22 +370,17 @@ impl Vault {
     }
 
     #[message]
-    pub fn sign_integrity(
+    pub fn sign_integrity(&mut self, mac_input: Vec<u8>) -> Result<(i32, Vec<u8>), Error> {
-        &mut self,
-        mac_input: Vec<u8>,
-    ) -> Result<(RootKeyHistoryId, Vec<u8>), Error> {
         let Unsealed {
             root_key,
             root_key_history_id,
         } = Self::expect_unsealed(&mut self.state)?;
 
-        let mut hmac = root_key
+        let mut hmac = root_key.0.read_inline(|k| {
-            .0
+            HmacSha256::new_from_slice(k)
-            .read_inline(|k| match HmacSha256::new_from_slice(k) {
+                .unwrap_or_else(|_| unreachable!("HMAC accepts keys of any size"))
-                Ok(v) => v,
+        });
-                Err(_) => unreachable!("HMAC accepts keys of any size"),
+        hmac.update(&root_key_history_id.to_be_bytes());
-            });
-        hmac.update(&root_key_history_id.to_raw().to_be_bytes());
         hmac.update(&mac_input);
 
         let mac = hmac.finalize().into_bytes().to_vec();
@@ -372,7 +392,7 @@ impl Vault {
         &mut self,
         mac_input: Vec<u8>,
         expected_mac: Vec<u8>,
-        key_version: RootKeyHistoryId,
+        key_version: i32,
     ) -> Result<bool, Error> {
         let Unsealed {
             root_key,
@@ -380,16 +400,17 @@ impl Vault {
         } = Self::expect_unsealed(&mut self.state)?;
 
         if *root_key_history_id != key_version {
-            return Ok(false);
+            return Err(Error::KeyVersionMismatch {
+                envelope: key_version,
+                current: *root_key_history_id,
+            });
         }
 
-        let mut hmac = root_key
+        let mut hmac = root_key.0.read_inline(|k| {
-            .0
+            HmacSha256::new_from_slice(k)
-            .read_inline(|k| match HmacSha256::new_from_slice(k) {
+                .unwrap_or_else(|_| unreachable!("HMAC accepts keys of any size"))
-                Ok(v) => v,
+        });
-                Err(_) => unreachable!("HMAC accepts keys of any size"),
+        hmac.update(&key_version.to_be_bytes());
-            });
-        hmac.update(&key_version.to_raw().to_be_bytes());
         hmac.update(&mac_input);
 
         Ok(hmac.verify_slice(&expected_mac).is_ok())
@@ -413,7 +434,6 @@ impl Vault {
 #[cfg(test)]
 mod tests {
     use crate::actors::GlobalActors;
-    use crate::db::models::RootKeyHistory;
     use arbiter_crypto::safecell::SafeCellHandle as _;
 
     use super::*;
@@ -432,12 +452,13 @@ 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 root_key_history_id = match actor.state {
+
-            State::Unsealed(Unsealed {
+        let State::Unsealed(Unsealed {
-                root_key_history_id,
+            root_key_history_id,
-                ..
+            ..
-            }) => root_key_history_id,
+        }) = actor.state
-            _ => panic!("expected unsealed state"),
+        else {
+            panic!("expected unsealed state")
         };
 
         let n1 = Vault::get_new_nonce(&db, root_key_history_id)
@@ -457,7 +478,7 @@ mod tests {
         assert_eq!(root_row.data_encryption_nonce, n2.to_vec());
 
         let id = actor
-            .create_new(SafeCell::new(b"post-interleave".to_vec()))
+            .create_new(SafeCell::new(b"post-interleave".to_vec()), b"test-aad".to_vec())
             .await
             .unwrap();
         let row: models::AeadEncrypted = schema::aead_encrypted::table

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

@@ -13,6 +13,7 @@ use diesel_async::{AsyncConnection, RunQueryDsl};
 use hmac::Hmac;
 use kameo::{actor::ActorRef, error::SendError};
 use sha2::{Digest as _, Sha256};
+use tracing::error;
 
 #[derive(Debug, thiserror::Error)]
 pub enum Error {
@@ -121,7 +122,10 @@ pub async fn sign_entity<E: Integrable>(
             .await
             .map_err(|err| match err {
                 SendError::HandlerError(inner) => Error::Vault(inner),
-                _ => Error::VaultSend,
+                other => {
+                    error!(?other, "Vault unreachable while signing integrity envelope");
+                    Error::VaultSend
+                }
             })?;
 
     insert_into(integrity_envelope::table)
@@ -192,13 +196,21 @@ pub async fn verify_entity<E: Integrable>(
         Ok(false) => Err(Error::MacMismatch {
             entity_kind: E::KIND,
         }),
-        Err(SendError::HandlerError(vault::Error::Sealed)) => Ok(AttestationStatus::Unavailable),
+        Err(SendError::HandlerError(
-        Err(_) => Err(Error::VaultSend),
+            vault::Error::Sealed | vault::Error::KeyVersionMismatch { .. },
+        )) => Ok(AttestationStatus::Unavailable),
+        Err(other) => {
+            error!(?other, "Vault unreachable while verifying integrity envelope");
+            Err(Error::VaultSend)
+        }
     }
 }
 
 pub async fn is_signing_available(vault: &ActorRef<Vault>) -> Result<bool, Error> {
-    let state = vault.ask(GetState).await.map_err(|_| Error::VaultSend)?;
+    let state = vault.ask(GetState).await.map_err(|err| {
+        error!(?err, "Vault unreachable while querying signing availability");
+        Error::VaultSend
+    })?;
     Ok(matches!(state, vault::VaultState::Unsealed))
 }
 
@@ -331,4 +343,47 @@ 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/db/models.rs

@@ -79,41 +79,10 @@ pub mod types {
         }
     }
 
-    macro_rules! declare_id {
+    #[derive(Debug, FromSqlRow, AsExpression, Clone)]
-        ($name:ident) => {
+    #[diesel(sql_type = Integer)]
-            #[derive(Debug, FromSqlRow, AsExpression, Clone, Hash, Copy, PartialEq, Eq)]
+    #[repr(transparent)] // hint compiler to optimize the wrapper struct away
-            #[diesel(sql_type = Integer)]
+    pub struct ChainId(pub i32);
-            #[repr(transparent)] // hint compiler to optimize the wrapper struct away
-            pub struct $name(i32);
-
-            impl $name {
-                pub const fn to_raw(self) -> i32 {
-                    self.0
-                }
-                pub const fn from_raw(raw: i32) -> Self {
-                    Self(raw)
-                }
-            }
-
-            impl FromSql<Integer, Sqlite> for $name {
-                fn from_sql(
-                    bytes: <Sqlite as diesel::backend::Backend>::RawValue<'_>,
-                ) -> diesel::deserialize::Result<Self> {
-                    FromSql::<Integer, Sqlite>::from_sql(bytes).map(Self)
-                }
-            }
-            impl ToSql<Integer, Sqlite> for $name {
-                fn to_sql<'b>(
-                    &'b self,
-                    out: &mut diesel::serialize::Output<'b, '_, Sqlite>,
-                ) -> diesel::serialize::Result {
-                    ToSql::<Integer, Sqlite>::to_sql(&self.0, out)
-                }
-            }
-        };
-    }
-
-    declare_id!(ChainId);
 
     #[expect(
         clippy::cast_sign_loss,
@@ -134,13 +103,21 @@ pub mod types {
         }
     };
 
-    declare_id!(OperatorId);
+    impl FromSql<Integer, Sqlite> for ChainId {
-    declare_id!(OperatorIdentityId);
+        fn from_sql(
-    declare_id!(AeadEncryptedId);
+            bytes: <Sqlite as diesel::backend::Backend>::RawValue<'_>,
-    declare_id!(RootKeyHistoryId);
+        ) -> diesel::deserialize::Result<Self> {
-    declare_id!(TlsHistoryId);
+            FromSql::<Integer, Sqlite>::from_sql(bytes).map(Self)
-    declare_id!(EvmWalletId);
+        }
-    declare_id!(ClientId);
+    }
+    impl ToSql<Integer, Sqlite> for ChainId {
+        fn to_sql<'b>(
+            &'b self,
+            out: &mut diesel::serialize::Output<'b, '_, Sqlite>,
+        ) -> diesel::serialize::Result {
+            ToSql::<Integer, Sqlite>::to_sql(&self.0, out)
+        }
+    }
 }
 pub use types::*;
 
@@ -153,12 +130,12 @@ pub use types::*;
 )]
 #[diesel(table_name = aead_encrypted, check_for_backend(Sqlite))]
 pub struct AeadEncrypted {
-    pub id: AeadEncryptedId,
+    pub id: i32,
     pub ciphertext: Vec<u8>,
     pub tag: Vec<u8>,
     pub current_nonce: Vec<u8>,
     pub schema_version: i32,
-    pub associated_root_key_id: RootKeyHistoryId,
+    pub associated_root_key_id: i32, // references root_key_history.id
     pub created_at: SqliteTimestamp,
 }
 
@@ -171,7 +148,7 @@ pub struct AeadEncrypted {
     attributes_with = "deriveless"
 )]
 pub struct RootKeyHistory {
-    pub id: RootKeyHistoryId,
+    pub id: i32,
     pub ciphertext: Vec<u8>,
     pub tag: Vec<u8>,
     pub root_key_encryption_nonce: Vec<u8>,
@@ -189,7 +166,7 @@ pub struct RootKeyHistory {
     attributes_with = "deriveless"
 )]
 pub struct TlsHistory {
-    pub id: TlsHistoryId,
+    pub id: i32,
     pub cert: String,
     pub cert_key: String, // PEM Encoded private key
     pub ca_cert: String,  // PEM Encoded certificate for cert signing
@@ -214,7 +191,7 @@ pub struct ArbiterSettings {
     attributes_with = "deriveless"
 )]
 pub struct EvmWallet {
-    pub id: EvmWalletId,
+    pub id: i32,
     pub address: Vec<u8>,
     pub aead_encrypted_id: i32,
     pub created_at: SqliteTimestamp,
@@ -236,7 +213,7 @@ pub struct EvmWallet {
 )]
 pub struct EvmWalletAccess {
     pub id: i32,
-    pub wallet_id: EvmWalletId,
+    pub wallet_id: i32,
     pub client_id: i32,
     pub created_at: SqliteTimestamp,
 }
@@ -263,7 +240,7 @@ pub struct ProgramClientMetadataHistory {
 #[derive(Models, Queryable, Debug, Insertable, Selectable)]
 #[diesel(table_name = schema::program_client, check_for_backend(Sqlite))]
 pub struct ProgramClient {
-    pub id: ClientId,
+    pub id: i32,
     pub public_key: Vec<u8>,
     pub metadata_id: i32,
     pub created_at: SqliteTimestamp,
@@ -273,22 +250,12 @@ pub struct ProgramClient {
 #[derive(Queryable, Debug)]
 #[diesel(table_name = schema::operator_client, check_for_backend(Sqlite))]
 pub struct OperatorClient {
-    pub id: OperatorIdentityId,
+    pub id: i32,
     pub public_key: Vec<u8>,
     pub created_at: SqliteTimestamp,
     pub updated_at: SqliteTimestamp,
 }
 
-#[derive(Queryable, Debug)]
-#[diesel(table_name = schema::operator, check_for_backend(Sqlite))]
-pub struct Operator {
-    pub id: OperatorId,
-    pub share: Vec<u8>,
-    pub share_nonce: Vec<u8>,
-    pub created_at: SqliteTimestamp,
-    pub updated_at: SqliteTimestamp,
-}
-
 #[derive(Models, Queryable, Debug, Insertable, Selectable)]
 #[diesel(table_name = evm_ether_transfer_limit, check_for_backend(Sqlite))]
 #[view(
@@ -432,7 +399,7 @@ pub struct IntegrityEnvelope {
     pub entity_kind: String,
     pub entity_id: Vec<u8>,
     pub payload_version: i32,
-    pub key_version: RootKeyHistoryId,
+    pub key_version: i32,
     pub mac: Vec<u8>,
     pub signed_at: SqliteTimestamp,
     pub created_at: SqliteTimestamp,

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

@@ -152,25 +152,6 @@ diesel::table! {
     }
 }
 
-diesel::table! {
-    operator (id) {
-        id -> Nullable<Integer>,
-        share -> Binary,
-        share_nonce -> Binary,
-        created_at -> Integer,
-        updated_at -> Integer,
-    }
-}
-
-diesel::table! {
-    operator_identity (id) {
-        id -> Integer,
-        public_key -> Binary,
-        created_at -> Integer,
-        updated_at -> Integer,
-    }
-}
-
 diesel::table! {
     program_client (id) {
         id -> Integer,
@@ -204,6 +185,15 @@ diesel::table! {
     }
 }
 
+diesel::table! {
+    operator_client (id) {
+        id -> Integer,
+        public_key -> Binary,
+        created_at -> Integer,
+        updated_at -> Integer,
+    }
+}
+
 diesel::joinable!(aead_encrypted -> root_key_history (associated_root_key_id));
 diesel::joinable!(arbiter_settings -> root_key_history (root_key_id));
 diesel::joinable!(arbiter_settings -> tls_history (tls_id));
@@ -222,7 +212,6 @@ diesel::joinable!(evm_transaction_log -> evm_wallet_access (wallet_access_id));
 diesel::joinable!(evm_wallet -> aead_encrypted (aead_encrypted_id));
 diesel::joinable!(evm_wallet_access -> evm_wallet (wallet_id));
 diesel::joinable!(evm_wallet_access -> program_client (client_id));
-diesel::joinable!(operator -> operator_identity (id));
 diesel::joinable!(program_client -> client_metadata (metadata_id));
 
 diesel::allow_tables_to_appear_in_same_query!(
@@ -241,9 +230,8 @@ diesel::allow_tables_to_appear_in_same_query!(
     evm_wallet,
     evm_wallet_access,
     integrity_envelope,
-    operator,
-    operator_identity,
     program_client,
     root_key_history,
     tls_history,
+    operator_client,
 );

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

@@ -1,28 +1,34 @@
+use diesel_async::{AsyncConnection, RunQueryDsl};
+use kameo::actor::ActorRef;
+
 use crate::{
     actors::vault::Vault,
     crypto::integrity,
     db::{
         self, DatabaseError,
         models::{
-            EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
+            EvmBasicGrant, EvmEtherTransferGrant, EvmEtherTransferGrantTarget,
+            EvmEtherTransferLimit, EvmTokenTransferGrant, EvmTokenTransferVolumeLimit,
+            EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
         },
         schema::{self, evm_transaction_log},
     },
     evm::policies::{
         CombinedSettings, DatabaseID, EvalContext, EvalViolation, Grant, Policy,
-        SharedGrantSettings, SpecificGrant, SpecificMeaning, ether_transfer::EtherTransfer,
+        SharedGrantSettings, SpecificGrant, SpecificMeaning, VolumeRateLimit,
-        token_transfers::TokenTransfer,
+        ether_transfer::EtherTransfer, token_transfers::TokenTransfer,
     },
 };
 
 use alloy::{
     consensus::TxEip1559,
-    primitives::{TxKind, U256},
+    primitives::{Address, TxKind, U256},
 };
 use chrono::Utc;
-use diesel::{ExpressionMethods as _, QueryDsl as _, QueryResult, insert_into, sqlite::Sqlite};
+use diesel::{
-use diesel_async::{AsyncConnection, RunQueryDsl};
+    ExpressionMethods as _, OptionalExtension, QueryDsl as _, QueryResult, SelectableHelper,
-use kameo::actor::ActorRef;
+    insert_into, sqlite::Sqlite, update,
+};
 
 pub mod abi;
 pub mod safe_signer;
@@ -272,6 +278,151 @@ 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>,
@@ -351,21 +502,26 @@ impl Engine {
 #[cfg(test)]
 mod tests {
     use alloy::primitives::{Address, Bytes, U256, address};
+    use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
     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::integrity;
     use crate::db::{
         self, DatabaseConnection,
         models::{
-            EvmBasicGrant, EvmWalletAccess, EvmWalletId, NewEvmBasicGrant, NewEvmTransactionLog,
+            EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
-            SqliteTimestamp,
         },
         schema::{evm_basic_grant, evm_transaction_log},
     };
+    use crate::evm::policies::ether_transfer::EtherTransfer;
     use crate::evm::policies::{
-        EvalContext, EvalViolation, SharedGrantSettings, TransactionRateLimit,
+        CombinedSettings, EvalContext, EvalViolation, Policy, SharedGrantSettings,
+        TransactionRateLimit, VolumeRateLimit,
     };
 
     use super::check_shared_constraints;
@@ -378,7 +534,7 @@ mod tests {
         EvalContext {
             target: EvmWalletAccess {
                 id: WALLET_ACCESS_ID,
-                wallet_id: EvmWalletId::from_raw(5),
+                wallet_id: 10,
                 client_id: 20,
                 created_at: SqliteTimestamp(Utc::now()),
             },
@@ -397,6 +553,7 @@ 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,
@@ -605,4 +762,115 @@ 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_raw: SafeCell::new(b"integrity-test-seal-key".to_vec()),
+            })
+            .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: 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

@@ -144,6 +144,7 @@ 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>,
@@ -158,6 +159,7 @@ 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

@@ -3,8 +3,7 @@ use crate::{
     db::{
         self, DatabaseConnection,
         models::{
-            EvmBasicGrant, EvmWalletAccess, EvmWalletId, NewEvmBasicGrant, NewEvmTransactionLog,
+            EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, NewEvmTransactionLog, SqliteTimestamp,
-            SqliteTimestamp,
         },
         schema::{evm_basic_grant, evm_transaction_log},
     },
@@ -32,7 +31,7 @@ fn ctx(to: Address, value: U256) -> EvalContext {
     EvalContext {
         target: EvmWalletAccess {
             id: WALLET_ACCESS_ID,
-            wallet_id: EvmWalletId::from_raw(10),
+            wallet_id: 10,
             client_id: 20,
             created_at: SqliteTimestamp(Utc::now()),
         },
@@ -80,6 +79,7 @@ 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

@@ -2,7 +2,7 @@ use super::{Settings, TokenTransfer};
 use crate::{
     db::{
         self, DatabaseConnection,
-        models::{EvmBasicGrant, EvmWalletAccess, EvmWalletId, NewEvmBasicGrant, SqliteTimestamp},
+        models::{EvmBasicGrant, EvmWalletAccess, NewEvmBasicGrant, SqliteTimestamp},
         schema::evm_basic_grant,
     },
     evm::{
@@ -45,7 +45,7 @@ fn ctx(to: Address, calldata: Bytes) -> EvalContext {
     EvalContext {
         target: EvmWalletAccess {
             id: WALLET_ACCESS_ID,
-            wallet_id: EvmWalletId::from_raw(10),
+            wallet_id: 10,
             client_id: 20,
             created_at: SqliteTimestamp(Utc::now()),
         },
@@ -98,6 +98,7 @@ 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/grpc/client/auth.rs

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

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

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

@@ -90,7 +90,7 @@ async fn handle_wallet_list(
                 .into_iter()
                 .map(|(id, address)| WalletEntry {
                     address: address.to_vec(),
-                    id: id.to_raw(),
+                    id,
                 })
                 .collect(),
         }),
@@ -217,6 +217,11 @@ 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

@@ -1,10 +1,11 @@
 use crate::{
-    db::models::{CoreEvmWalletAccess, EvmWalletId, NewEvmWalletAccess},
+    db::models::{CoreEvmWalletAccess, NewEvmWalletAccess},
     evm::policies::{
         SharedGrantSettings, SpecificGrant, TransactionRateLimit, VolumeRateLimit, ether_transfer,
         token_transfers,
     },
-    grpc::{Convert, TryConvert},
+    grpc::Convert,
+    grpc::TryConvert,
 };
 use arbiter_proto::{
     proto::evm::{
@@ -86,6 +87,7 @@ 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()
@@ -149,7 +151,7 @@ impl Convert for WalletAccess {
 
     fn convert(self) -> Self::Output {
         NewEvmWalletAccess {
-            wallet_id: EvmWalletId::from_raw(self.wallet_id),
+            wallet_id: self.wallet_id,
             client_id: self.sdk_client_id,
         }
     }
@@ -164,7 +166,7 @@ impl TryConvert for SdkClientWalletAccess {
             return Err(Status::invalid_argument("Missing wallet access entry"));
         };
         Ok(CoreEvmWalletAccess {
-            wallet_id: EvmWalletId::from_raw(access.wallet_id),
+            wallet_id: access.wallet_id,
             client_id: access.sdk_client_id,
             id: self.id,
         })

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

@@ -103,7 +103,7 @@ impl Convert for EvmWalletAccess {
         Self::Output {
             id: self.id,
             access: Some(WalletAccess {
-                wallet_id: self.wallet_id.to_raw(),
+                wallet_id: self.wallet_id,
                 sdk_client_id: self.client_id,
             }),
         }

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

@@ -2,7 +2,7 @@ use crate::{
     db::models::NewEvmWalletAccess,
     grpc::Convert,
     peers::operator::{
-        OperatorSession, OutOfBand,
+        OutOfBand, OperatorSession,
         session::handlers::{
             HandleGrantEvmWalletAccess, HandleListWalletAccess, HandleNewClientApprove,
             HandleRevokeEvmWalletAccess, HandleSdkClientList,
@@ -11,8 +11,8 @@ use crate::{
 };
 use arbiter_crypto::authn;
 use arbiter_proto::proto::{
+    shared::ClientInfo as ProtoClientMetadata,
     operator::{
-        operator_response::Payload as OperatorResponsePayload,
         sdk_client::{
             self as proto_sdk_client, ConnectionCancel as ProtoSdkClientConnectionCancel,
             ConnectionRequest as ProtoSdkClientConnectionRequest,
@@ -24,8 +24,8 @@ use arbiter_proto::proto::{
             request::Payload as SdkClientRequestPayload,
             response::Payload as SdkClientResponsePayload,
         },
+        operator_response::Payload as OperatorResponsePayload,
     },
-    shared::ClientInfo as ProtoClientMetadata,
 };
 
 use kameo::actor::ActorRef;
@@ -115,7 +115,7 @@ async fn handle_list(
             clients: clients
                 .into_iter()
                 .map(|(client, metadata)| ProtoSdkClientEntry {
-                    id: client.id.to_raw(),
+                    id: client.id,
                     pubkey: client.public_key.clone(),
                     info: Some(ProtoClientMetadata {
                         name: metadata.name,

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

@@ -87,6 +87,7 @@ impl TryConvert for vault_gate::Outbound {
                 let proto_result = match result {
                     Ok(()) => ProtoUnsealResult::Success,
                     Err(vault_gate::Error::InvalidKey) => ProtoUnsealResult::InvalidKey,
+                    Err(vault_gate::Error::LockedOut) => ProtoUnsealResult::LockedOut,
                     Err(err) => {
                         warn!(?err, "unseal failed");
                         return Err(Status::internal("Failed to unseal vault"));

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

@@ -8,7 +8,7 @@ use crate::{
     crypto::integrity::{self, AttestationStatus},
     db::{
         self,
-        models::{ProgramClientMetadata, SqliteTimestamp},
+        models::ProgramClientMetadata,
         schema::program_client,
     },
 };
@@ -18,14 +18,13 @@ use arbiter_proto::{
     transport::{Bi, expect_message},
 };
 
-use chrono::Utc;
 use diesel::{
     ExpressionMethods as _, OptionalExtension as _, QueryDsl as _, SelectableHelper as _,
-    dsl::insert_into, update,
+    dsl::insert_into,
 };
 use diesel_async::RunQueryDsl as _;
 use kameo::{actor::ActorRef, error::SendError};
-use tracing::error;
+use tracing::{error, warn};
 
 #[derive(thiserror::Error, Debug, Clone, PartialEq, Eq)]
 pub enum Error {
@@ -211,71 +210,47 @@ async fn insert_client(
     .await
 }
 
-async fn sync_client_metadata(
+/// 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(
     db: &db::DatabasePool,
     client_id: i32,
-    metadata: &ClientMetadata,
+    presented: &ClientMetadata,
 ) -> Result<(), Error> {
-    use crate::db::schema::{client_metadata, client_metadata_history};
+    use crate::db::schema::client_metadata;
-
-    let now = SqliteTimestamp(Utc::now());
 
     let mut conn = db.get().await.map_err(|e| {
         error!(error = ?e, "Database pool error");
         Error::DatabasePoolUnavailable
     })?;
 
-    conn.exclusive_transaction(async |conn| {
+    let current: ProgramClientMetadata = program_client::table
-        let (current_metadata_id, current): (i32, ProgramClientMetadata) = program_client::table
+        .find(client_id)
-            .find(client_id)
+        .inner_join(client_metadata::table)
-            .inner_join(client_metadata::table)
+        .select(ProgramClientMetadata::as_select())
-            .select((
+        .first(&mut conn)
-                program_client::metadata_id,
+        .await
-                ProgramClientMetadata::as_select(),
+        .map_err(|e| {
-            ))
+            error!(error = ?e, "Database error");
-            .first(&mut *conn)
+            Error::DatabaseOperationFailed
-            .await?;
+        })?;
 
-        let unchanged = current.name == metadata.name
+    let changed = current.name != presented.name
-            && current.description == metadata.description
+        || current.description != presented.description
-            && current.version == metadata.version;
+        || current.version != presented.version;
-        if unchanged {
-            return Ok(());
-        }
 
-        insert_into(client_metadata_history::table)
+    if changed {
-            .values((
+        warn!(
-                client_metadata_history::metadata_id.eq(current_metadata_id),
+            client_id,
-                client_metadata_history::client_id.eq(client_id),
+            stored_name = %current.name,
-            ))
+            presented_name = %presented.name,
-            .execute(&mut *conn)
+            "reconnecting client presented different metadata; ignoring - metadata is frozen after operator approval"
-            .await?;
+        );
+    }
 
-        let metadata_id = insert_into(client_metadata::table)
+    Ok(())
-            .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>(
@@ -298,7 +273,7 @@ where
 
     let signature = expect_message(transport, |req: Inbound| match req {
         Inbound::AuthChallengeSolution { signature } => Some(signature),
-        _ => None,
+        Inbound::AuthChallengeRequest { .. } => None,
     })
     .await
     .map_err(|e| {
@@ -324,6 +299,7 @@ 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(
@@ -337,8 +313,6 @@ 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 { actor: this })
+            .ask(RegisterClient { client_id: args.client_id, 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<String>,
+        bootstrap_token: Option<Vec<u8>>,
     },
     AuthChallengeSolution {
         signature: Vec<u8>,
@@ -26,21 +26,22 @@ pub enum Error {
     UnregisteredPublicKey,
     InvalidChallengeSolution,
     InvalidBootstrapToken,
-    Internal { details: String },
+    /// Reaches the operator verbatim via `Status::internal`, so the payload is
+    /// `&'static str`: the type makes it impossible to interpolate an inner
+    /// error. Log the cause, send the constant.
+    Internal { details: &'static str },
     Transport,
 }
 
 impl Error {
-    fn internal(details: impl Into<String>) -> Self {
+    const fn internal(details: &'static str) -> Self {
-        Self::Internal {
+        Self::Internal { details }
-            details: details.into(),
-        }
     }
 }
 
 impl From<diesel::result::Error> for Error {
     fn from(e: diesel::result::Error) -> Self {
-        error!(?e, "Database error");
+        error!(error = %crate::utils::error_chain(&e), "Database error");
         Self::internal("Database error")
     }
 }

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

@@ -4,7 +4,7 @@ use super::{
 };
 use crate::{
     actors::bootstrap::ConsumeToken,
-    db::{DatabasePool, schema::operator_identity},
+    db::{DatabasePool, schema::operator_client},
     peers::operator::auth::Outbound,
 };
 use arbiter_crypto::authn::{self, AuthChallenge, OPERATOR_CONTEXT};
@@ -16,13 +16,12 @@ use tracing::error;
 
 pub(super) struct ChallengeRequest {
     pub(super) pubkey: authn::PublicKey,
-    pub(super) bootstrap_token: Option<String>,
+    pub(super) bootstrap_token: Option<Vec<u8>>,
 }
 
-pub(super) struct ChallengeContext {
+pub struct ChallengeContext {
     pub(super) challenge: AuthChallenge,
     pub(super) pubkey: authn::PublicKey,
-    pub(super) bootstrap_token: Option<String>,
 }
 
 pub(super) struct ChallengeSolution {
@@ -44,9 +43,9 @@ async fn get_client_id(db: &DatabasePool, pubkey: &authn::PublicKey) -> Result<O
         Error::internal("Database unavailable")
     })?;
 
-    operator_identity::table
+    operator_client::table
-        .filter(operator_identity::public_key.eq(pubkey.to_bytes()))
+        .filter(operator_client::public_key.eq(pubkey.to_bytes()))
-        .select(operator_identity::id)
+        .select(operator_client::id)
         .first::<i32>(&mut conn)
         .await
         .optional()
@@ -63,9 +62,9 @@ async fn register_key(db: &DatabasePool, pubkey: &authn::PublicKey) -> Result<i3
         Error::internal("Database unavailable")
     })?;
 
-    let id: i32 = diesel::insert_into(operator_identity::table)
+    let id: i32 = diesel::insert_into(operator_client::table)
-        .values((operator_identity::public_key.eq(pubkey_bytes),))
+        .values((operator_client::public_key.eq(pubkey_bytes),))
-        .returning(operator_identity::id)
+        .returning(operator_client::id)
         .get_result(&mut conn)
         .await
         .map_err(|e| {
@@ -79,11 +78,16 @@ async fn register_key(db: &DatabasePool, pubkey: &authn::PublicKey) -> Result<i3
 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 }
+        Self {
+            conn,
+            transport,
+            bootstrap_token: None,
+        }
     }
 }
 
@@ -108,6 +112,8 @@ where
             }
         }
 
+        self.bootstrap_token = bootstrap_token;
+
         let challenge = AuthChallenge::generate(&mut rand::rng());
 
         self.transport
@@ -120,22 +126,12 @@ where
                 Error::Transport
             })?;
 
-        Ok(ChallengeContext {
+        Ok(ChallengeContext { challenge, pubkey })
-            challenge,
-            pubkey,
-            bootstrap_token,
-        })
     }
 
-    #[allow(missing_docs)]
-    #[allow(clippy::unused_unit)]
     async fn verify_solution(
         &mut self,
-        ChallengeContext {
+        ChallengeContext { challenge, pubkey }: &ChallengeContext,
-            challenge,
-            pubkey,
-            bootstrap_token,
-        }: &ChallengeContext,
         ChallengeSolution { solution }: ChallengeSolution,
     ) -> Result<Credentials, Self::Error> {
         let signature = authn::Signature::try_from(solution.as_slice()).map_err(|()| {
@@ -154,15 +150,13 @@ where
         }
 
         // Resolve client id: bootstrap (consume token + register) or lookup
-        let id = match bootstrap_token {
+        let id = match self.bootstrap_token.take() {
             Some(token) => {
                 let token_ok: bool = self
                     .conn
                     .actors
                     .bootstrapper
-                    .ask(ConsumeToken {
+                    .ask(ConsumeToken { token })
-                        token: token.clone(),
-                    })
                     .await
                     .map_err(|e| {
                         error!(?e, "Failed to consume bootstrap token");

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

@@ -1,15 +1,14 @@
 use super::{Error, OperatorSession};
 use crate::{
-    actors::{
+    actors::evm::{
-        evm::{
+        ClientSignTransaction, Generate, ListWallets, OperatorCreateGrant, OperatorListGrants,
-            ClientSignTransaction, Generate, ListWallets, OperatorCreateGrant, OperatorListGrants,
+        SignTransactionError as EvmSignError,
-            SignTransactionError as EvmSignError,
-        },
-        flow_coordinator::client_connect_approval::ClientApprovalAnswer,
-        vault::VaultState,
     },
-    db::models::{
+    actors::flow_coordinator::{IsClientConnected, client_connect_approval::ClientApprovalAnswer},
-        EvmWalletAccess, EvmWalletId, NewEvmWalletAccess, ProgramClient, ProgramClientMetadata,
+    actors::vault::VaultState,
+    db::{
+        models::{EvmWalletAccess, NewEvmWalletAccess, ProgramClient, ProgramClientMetadata},
+        schema::program_client,
     },
     evm::policies::{Grant, SpecificGrant},
 };
@@ -19,13 +18,16 @@ 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;
+use tracing::{error, info, warn};
 
 #[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,
 }
@@ -74,9 +76,7 @@ impl OperatorSession {
     }
 
     #[message]
-    pub(crate) async fn handle_evm_wallet_list(
+    pub(crate) async fn handle_evm_wallet_list(&mut self) -> Result<Vec<(i32, Address)>, Error> {
-        &mut self,
-    ) -> Result<Vec<(EvmWalletId, Address)>, Error> {
         match self.props.actors.evm.ask(ListWallets {}).await {
             Ok(wallets) => Ok(wallets),
             Err(err) => {
@@ -147,6 +147,30 @@ 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
@@ -202,7 +226,7 @@ impl OperatorSession {
             use crate::db::schema::evm_wallet_access;
             for entry in entries {
                 diesel::delete(evm_wallet_access::table)
-                    .filter(evm_wallet_access::wallet_id.eq(entry))
+                    .filter(evm_wallet_access::id.eq(entry))
                     .execute(&mut *conn)
                     .await?;
             }
@@ -218,8 +242,7 @@ impl OperatorSession {
         &mut self,
     ) -> Result<Vec<EvmWalletAccess>, Error> {
         let mut conn = self.props.db.get().await?;
-        use crate::db::schema::evm_wallet_access;
+        let access_entries = crate::db::schema::evm_wallet_access::table
-        let access_entries = evm_wallet_access::table
             .select(EvmWalletAccess::as_select())
             .load::<_>(&mut conn)
             .await?;
@@ -256,6 +279,30 @@ 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(())
     }
 
@@ -278,3 +325,142 @@ impl OperatorSession {
         Ok(clients)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::db::{self, models::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: 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: 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: 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: 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,
+            "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

@@ -1,16 +1,14 @@
 use super::{OutOfBand, OperatorConnection};
 use crate::{
     actors::{
-        flow_coordinator::client_connect_approval::ClientApprovalController,
+        flow_coordinator::{GetConnectedClientIds, client_connect_approval::{ClientApprovalAnswer, ClientApprovalController}}, operator_registry::ConnectOperator,
-        operator_registry::ConnectOperator,
+    }, peers::client::ClientProfile,
-    },
-    peers::client::ClientProfile,
 };
 use arbiter_crypto::authn;
 use arbiter_proto::transport::Sender;
 
 use kameo::{Actor, actor::ActorRef, messages};
-use std::{borrow::Cow, collections::HashMap};
+use std::{borrow::Cow, collections::{HashMap, HashSet}};
 use thiserror::Error;
 use tracing::error;
 
@@ -54,6 +52,10 @@ 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;
@@ -63,7 +65,8 @@ impl OperatorSession {
         Self {
             props,
             sender,
-            pending_client_approvals: Default::default(),
+            pending_client_approvals: HashMap::default(),
+            approved_client_ids: HashSet::default(),
         }
     }
 }
@@ -88,6 +91,7 @@ impl OperatorSession {
                 actor = "operator",
                 event = "failed to announce new client connection"
             );
+            let _ = controller.tell(ClientApprovalAnswer { approved: false }).await;
             return;
         }
 
@@ -106,7 +110,7 @@ impl Actor for OperatorSession {
 
     type Error = Error;
 
-    async fn on_start(args: Self::Args, this: ActorRef<Self>) -> Result<Self, Self::Error> {
+    async fn on_start(mut args: Self::Args, this: ActorRef<Self>) -> Result<Self, Self::Error> {
         args.props
             .actors
             .operator_registry
@@ -121,6 +125,16 @@ 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

@@ -25,17 +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,
 
+    /// Reaches the operator verbatim via `Status::internal`, so the payload is
+    /// `&'static str`: the type makes it impossible to interpolate an inner
+    /// error. Log the cause, send the constant.
     #[error("Internal error: {0}")]
-    Internal(String),
+    Internal(&'static str),
-}
-impl Error {
-    fn internal(message: impl Into<String>) -> Self {
-        Self::Internal(message.into())
-    }
 }
 
 pub struct HandshakeResponse {
@@ -170,13 +170,14 @@ impl VaultGate {
                 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)
             }
             Err(err) => {
                 error!(?err, "Failed to send unseal request to vault");
-                Err(Error::internal("Vault actor error"))
+                Err(Error::Internal("Vault actor error"))
             }
         }
     }
@@ -218,7 +219,7 @@ impl VaultGate {
             }
             Err(err) => {
                 error!(?err, "Failed to send bootstrap request to vault");
-                Err(Error::internal("Vault error"))
+                Err(Error::Internal("Vault error"))
             }
         }
     }
@@ -230,7 +231,10 @@ impl VaultGate {
             .vault
             .ask(GetState {})
             .await
-            .map_err(|_| Error::internal("failed to query vault"))?;
+            .map_err(|err| {
+                error!(?err, "Failed to query vault state");
+                Error::Internal("failed to query vault")
+            })?;
 
         Ok(answer)
     }
@@ -249,7 +253,10 @@ impl Message<events::Bootstrapped> for VaultGate {
                 .db
                 .get()
                 .await
-                .map_err(|_| Error::internal("DB unavailable"))?;
+                .map_err(|err| {
+                    error!(error = %crate::utils::error_chain(&err), "DB unavailable on bootstrap");
+                    Error::Internal("DB unavailable")
+                })?;
             integrity::sign_entity(
                 &mut conn,
                 &self.actors.vault,
@@ -257,9 +264,12 @@ impl Message<events::Bootstrapped> for VaultGate {
                 self.auth_creds.id,
             )
             .await
-            .map_err(|e| {
+            .map_err(|err| {
-                error!(?e, "Failed to sign integrity envelope on bootstrap");
+                error!(
-                Error::internal("Integrity sign failed")
+                    error = %crate::utils::error_chain(&err),
+                    "Failed to sign integrity envelope on bootstrap"
+                );
+                Error::Internal("Integrity sign failed")
             })?;
             Ok(())
         }

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

@@ -14,3 +14,47 @@ impl<F: FnOnce()> Drop for DeferClosure<F> {
 pub fn defer<F: FnOnce()>(f: F) -> impl Drop + Sized {
     DeferClosure { f: Some(f) }
 }
+
+/// Renders an error together with its full `source` chain as `outer: inner: root`.
+///
+/// Error variants in this crate deliberately keep `Display` terse so that no
+/// internal detail can leak across the gRPC boundary. That same terseness would
+/// hide the cause in the logs, so use this for `tracing` fields, never in a
+/// wire payload.
+pub fn error_chain(err: &dyn core::error::Error) -> String {
+    let mut out = err.to_string();
+    let mut current = err.source();
+    while let Some(source) = current {
+        out.push_str(": ");
+        out.push_str(&source.to_string());
+        current = source.source();
+    }
+    out
+}
+
+#[cfg(test)]
+mod tests {
+    use super::error_chain;
+
+    #[derive(Debug, thiserror::Error)]
+    #[error("root")]
+    struct Root;
+
+    #[derive(Debug, thiserror::Error)]
+    #[error("middle")]
+    struct Middle(#[source] Root);
+
+    #[derive(Debug, thiserror::Error)]
+    #[error("outer")]
+    struct Outer(#[source] Middle);
+
+    #[test]
+    fn walks_the_whole_source_chain() {
+        assert_eq!(error_chain(&Root), "root", "a leaf error renders alone");
+        assert_eq!(
+            error_chain(&Outer(Middle(Root))),
+            "outer: middle: root",
+            "every source link must appear, in order"
+        );
+    }
+}

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

@@ -86,8 +86,8 @@ async fn insert_bootstrap_sentinel_operator(db: &db::DatabasePool) {
         .0
         .to_vec();
 
-    insert_into(schema::operator_identity::table)
+    insert_into(schema::operator_client::table)
-        .values((schema::operator_identity::public_key.eq(sentinel_key),))
+        .values((schema::operator_client::public_key.eq(sentinel_key),))
         .execute(&mut conn)
         .await
         .unwrap();
@@ -266,7 +266,7 @@ pub async fn metadata_unchanged_does_not_append_history() {
 
 #[tokio::test]
 #[test_log::test]
-pub async fn metadata_change_appends_history_and_repoints_binding() {
+pub async fn metadata_frozen_after_approval_ignores_reconnect_changes() {
     let db = db::create_test_pool().await;
     let actors = spawn_test_actors(&db).await;
     let new_key = MlDsa87::key_gen(&mut rand::rng());
@@ -287,6 +287,7 @@ pub async fn metadata_change_appends_history_and_repoints_binding() {
         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(),
@@ -313,6 +314,7 @@ pub async fn metadata_change_appends_history_and_repoints_binding() {
             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)
@@ -338,15 +340,16 @@ pub async fn metadata_change_appends_history_and_repoints_binding() {
             .first::<(String, Option<String>, Option<String>)>(&mut conn)
             .await
             .unwrap();
-        assert_eq!(metadata_count, 2);
+        assert_eq!(metadata_count, 1, "frozen: no new metadata row on reconnect");
-        assert_eq!(history_count, 1);
+        assert_eq!(history_count, 0, "frozen: no history entry on reconnect");
         assert_eq!(
             current,
             (
                 "client".to_owned(),
-                Some("new".to_owned()),
+                Some("old".to_owned()),
-                Some("2.0.0".to_owned())
+                Some("1.0.0".to_owned())
-            )
+            ),
+            "frozen: original metadata must be preserved"
         );
     }
 }

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

@@ -174,7 +174,7 @@ pub async fn bootstrap_token_auth() {
     test_transport
         .send(auth::Inbound::AuthChallengeRequest {
             pubkey: verifying_key(&new_key).into(),
-            bootstrap_token: Some(token),
+            bootstrap_token: Some(token.into_bytes()),
         })
         .await
         .unwrap();
@@ -206,8 +206,8 @@ pub async fn bootstrap_token_auth() {
     task.await.unwrap().unwrap();
 
     let mut conn = db.get().await.unwrap();
-    let stored_pubkey: Vec<u8> = schema::operator_identity::table
+    let stored_pubkey: Vec<u8> = schema::operator_client::table
-        .select(schema::operator_identity::public_key)
+        .select(schema::operator_client::public_key)
         .first::<Vec<u8>>(&mut conn)
         .await
         .unwrap();
@@ -231,7 +231,7 @@ pub async fn bootstrap_invalid_token_auth() {
     test_transport
         .send(auth::Inbound::AuthChallengeRequest {
             pubkey: verifying_key(&new_key).into(),
-            bootstrap_token: Some("invalid_token".to_owned()),
+            bootstrap_token: Some(b"invalid_token".to_vec()),
         })
         .await
         .unwrap();
@@ -259,7 +259,7 @@ pub async fn bootstrap_invalid_token_auth() {
     ));
 
     let mut conn = db.get().await.unwrap();
-    let count: i64 = schema::operator_identity::table
+    let count: i64 = schema::operator_client::table
         .count()
         .get_result::<i64>(&mut conn)
         .await
@@ -285,9 +285,9 @@ pub async fn challenge_auth() {
 
     {
         let mut conn = db.get().await.unwrap();
-        let id: i32 = insert_into(schema::operator_identity::table)
+        let id: i32 = insert_into(schema::operator_client::table)
-            .values((schema::operator_identity::public_key.eq(pubkey_bytes.clone()),))
+            .values((schema::operator_client::public_key.eq(pubkey_bytes.clone()),))
-            .returning(schema::operator_identity::id)
+            .returning(schema::operator_client::id)
             .get_result(&mut conn)
             .await
             .unwrap();
@@ -371,8 +371,8 @@ pub async fn challenge_auth_rejects_integrity_tag_mismatch_when_unsealed() {
 
     {
         let mut conn = db.get().await.unwrap();
-        insert_into(schema::operator_identity::table)
+        insert_into(schema::operator_client::table)
-            .values((schema::operator_identity::public_key.eq(pubkey_bytes.clone()),))
+            .values((schema::operator_client::public_key.eq(pubkey_bytes.clone()),))
             .execute(&mut conn)
             .await
             .unwrap();
@@ -400,7 +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 => panic!("Expected AuthChallenge, got {other:?}"),
+            other @ auth::Outbound::AuthSuccess => panic!("Expected AuthChallenge, got {other:?}"),
         },
         Err(err) => panic!("Expected Ok response, got Err({err:?})"),
     };
@@ -444,9 +444,9 @@ pub async fn challenge_auth_rejects_invalid_signature() {
 
     {
         let mut conn = db.get().await.unwrap();
-        let id: i32 = insert_into(schema::operator_identity::table)
+        let id: i32 = insert_into(schema::operator_client::table)
-            .values((schema::operator_identity::public_key.eq(pubkey_bytes.clone()),))
+            .values((schema::operator_client::public_key.eq(pubkey_bytes.clone()),))
-            .returning(schema::operator_identity::id)
+            .returning(schema::operator_client::id)
             .get_result(&mut conn)
             .await
             .unwrap();

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

@@ -14,6 +14,8 @@ 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,
@@ -27,6 +29,7 @@ async fn write_concurrently(
             let id = actor
                 .ask(CreateNew {
                     plaintext: SafeCell::new(plaintext.clone()),
+                    aad: TEST_AAD.to_vec(),
                 })
                 .await
                 .unwrap();
@@ -120,7 +123,7 @@ async fn insert_failure_does_not_create_partial_row() {
     drop(conn);
 
     let err = actor
-        .create_new(SafeCell::new(b"should fail".to_vec()))
+        .create_new(SafeCell::new(b"should fail".to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap_err();
     assert!(matches!(err, Error::DatabaseTransaction(_)));
@@ -171,7 +174,7 @@ async fn decrypt_roundtrip_after_high_concurrency() {
         .unwrap();
 
     for (id, plaintext) in expected {
-        let mut decrypted = decryptor.decrypt(id).await.unwrap();
+        let mut decrypted = decryptor.decrypt(id, TEST_AAD.to_vec()).await.unwrap();
         assert_eq!(*decrypted.read(), plaintext);
     }
 }

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

@@ -12,9 +12,11 @@ use arbiter_server::{
 use diesel::{QueryDsl, SelectableHelper};
 use diesel_async::RunQueryDsl;
 
+const TEST_AAD: &[u8] = b"test-aad";
+
 #[tokio::test]
 #[test_log::test]
-async fn test_bootstrap() {
+async fn bootstrap() {
     let db = db::create_test_pool().await;
     let mut actor = Vault::new(db.clone(), GlobalActors::spawn_message_bus())
         .await
@@ -39,7 +41,7 @@ async fn test_bootstrap() {
 
 #[tokio::test]
 #[test_log::test]
-async fn test_bootstrap_rejects_double() {
+async fn bootstrap_rejects_double() {
     let db = db::create_test_pool().await;
     let mut actor = common::bootstrapped_vault(&db).await;
 
@@ -50,14 +52,14 @@ async fn test_bootstrap_rejects_double() {
 
 #[tokio::test]
 #[test_log::test]
-async fn test_create_new_before_bootstrap_fails() {
+async fn 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()))
+        .create_new(SafeCell::new(b"data".to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap_err();
     assert!(matches!(err, Error::NotBootstrapped));
@@ -65,19 +67,19 @@ async fn test_create_new_before_bootstrap_fails() {
 
 #[tokio::test]
 #[test_log::test]
-async fn test_decrypt_before_bootstrap_fails() {
+async fn 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).await.unwrap_err();
+    let err = actor.decrypt(1, TEST_AAD.to_vec()).await.unwrap_err();
     assert!(matches!(err, Error::NotBootstrapped));
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn test_new_restores_sealed_state() {
+async fn new_restores_sealed_state() {
     let db = db::create_test_pool().await;
     let actor = common::bootstrapped_vault(&db).await;
     drop(actor);
@@ -85,19 +87,19 @@ async fn test_new_restores_sealed_state() {
     let mut actor2 = Vault::new(db, GlobalActors::spawn_message_bus())
         .await
         .unwrap();
-    let err = actor2.decrypt(1).await.unwrap_err();
+    let err = actor2.decrypt(1, TEST_AAD.to_vec()).await.unwrap_err();
     assert!(matches!(err, Error::Sealed));
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn test_unseal_correct_password() {
+async fn 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()))
+        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap();
     drop(actor);
@@ -108,19 +110,19 @@ async fn test_unseal_correct_password() {
     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).await.unwrap();
+    let mut decrypted = actor.decrypt(aead_id, TEST_AAD.to_vec()).await.unwrap();
     assert_eq!(*decrypted.read(), plaintext);
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn test_unseal_wrong_then_correct_password() {
+async fn 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()))
+        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap();
     drop(actor);
@@ -136,6 +138,6 @@ async fn test_unseal_wrong_then_correct_password() {
     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).await.unwrap();
+    let mut decrypted = actor.decrypt(aead_id, TEST_AAD.to_vec()).await.unwrap();
     assert_eq!(*decrypted.read(), plaintext);
 }

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

@@ -10,45 +10,47 @@ 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 test_create_decrypt_roundtrip() {
+async fn 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()))
+        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap();
 
-    let mut decrypted = actor.decrypt(aead_id).await.unwrap();
+    let mut decrypted = actor.decrypt(aead_id, TEST_AAD.to_vec()).await.unwrap();
     assert_eq!(*decrypted.read(), plaintext);
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn test_decrypt_nonexistent_returns_not_found() {
+async fn 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).await.unwrap_err();
+    let err = actor.decrypt(9999, TEST_AAD.to_vec()).await.unwrap_err();
     assert!(matches!(err, Error::NotFound));
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn test_ciphertext_differs_across_entries() {
+async fn 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()))
+        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap();
     let id2 = actor
-        .create_new(SafeCell::new(plaintext.to_vec()))
+        .create_new(SafeCell::new(plaintext.to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap();
 
@@ -68,22 +70,22 @@ async fn test_ciphertext_differs_across_entries() {
 
     assert_ne!(row1.ciphertext, row2.ciphertext);
 
-    let mut d1 = actor.decrypt(id1).await.unwrap();
+    let mut d1 = actor.decrypt(id1, TEST_AAD.to_vec()).await.unwrap();
-    let mut d2 = actor.decrypt(id2).await.unwrap();
+    let mut d2 = actor.decrypt(id2, TEST_AAD.to_vec()).await.unwrap();
     assert_eq!(*d1.read(), plaintext);
     assert_eq!(*d2.read(), plaintext);
 }
 
 #[tokio::test]
 #[test_log::test]
-async fn test_nonce_never_reused() {
+async fn 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()))
+            .create_new(SafeCell::new(format!("secret {i}").into_bytes()), TEST_AAD.to_vec())
             .await
             .unwrap();
     }
@@ -137,7 +139,7 @@ async fn broken_db_nonce_format_fails_closed() {
     drop(conn);
 
     let err = actor
-        .create_new(SafeCell::new(b"must fail".to_vec()))
+        .create_new(SafeCell::new(b"must fail".to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap_err();
     assert!(matches!(err, Error::BrokenDatabase));
@@ -145,7 +147,7 @@ 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()))
+        .create_new(SafeCell::new(b"decrypt target".to_vec()), TEST_AAD.to_vec())
         .await
         .unwrap();
     let mut conn = db.get().await.unwrap();
@@ -156,6 +158,6 @@ async fn broken_db_nonce_format_fails_closed() {
         .unwrap();
     drop(conn);
 
-    let err = actor.decrypt(id).await.unwrap_err();
+    let err = actor.decrypt(id, TEST_AAD.to_vec()).await.unwrap_err();
     assert!(matches!(err, Error::BrokenDatabase));
 }