Release v1.0.9 - Add wallet tab with Cashu and Lightning support

- Add wallet tab with NWC (Nostr Wallet Connect) Lightning support
- Add Cashu ecash wallet with mint management, send/receive tokens
- Add Cashu deposit feature (mint via Lightning invoice)
- Add token viewer showing proof amounts and timestamps
- Add refresh button with auto-refresh for spent proof detection
- Add browser sync warning for Cashu users on welcome screen
- Add Cashu onboarding info panel with storage considerations
- Add settings page sync info note explaining how to change sync
- Add backups page for vault snapshot management
- Add About section to identity (You) page
- Fix lint accessibility issues in wallet component

Files modified:
- projects/common/src/lib/services/nwc/* (new)
- projects/common/src/lib/services/cashu/* (new)
- projects/common/src/lib/services/storage/* (extended)
- projects/chrome/src/app/components/home/wallet/*
- projects/firefox/src/app/components/home/wallet/*
- projects/chrome/src/app/components/welcome/*
- projects/firefox/src/app/components/welcome/*
- projects/chrome/src/app/components/home/settings/*
- projects/firefox/src/app/components/home/settings/*
- projects/chrome/src/app/components/home/identity/*
- projects/firefox/src/app/components/home/identity/*
- projects/chrome/src/app/components/home/backups/* (new)
- projects/firefox/src/app/components/home/backups/* (new)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

angular.json

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package-lock.json

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+        "cliui": "^6.0.0",
+        "decamelize": "^1.2.0",
+        "find-up": "^4.1.0",
+        "get-caller-file": "^2.0.1",
+        "require-directory": "^2.1.1",
+        "require-main-filename": "^2.0.0",
+        "set-blocking": "^2.0.0",
+        "string-width": "^4.2.0",
+        "which-module": "^2.0.0",
+        "y18n": "^4.0.0",
+        "yargs-parser": "^18.1.2"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
+    "node_modules/qrcode/node_modules/yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "license": "ISC",
+      "dependencies": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/qs": {
       "version": "6.13.0",
       "resolved": "https://registry.npmjs.org/qs/-/qs-6.13.0.tgz",
@@ -16952,7 +17233,6 @@
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
       "integrity": "sha512-fGxEI7+wsG9xrvdjsrlmL22OMTTiHRwAMroiEeMgq8gzoLC/PQr7RsRDSTLUg/bZAZtF+TVIkHc6/4RIKrui+Q==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=0.10.0"
@@ -16968,6 +17248,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/require-main-filename": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/require-main-filename/-/require-main-filename-2.0.0.tgz",
+      "integrity": "sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==",
+      "license": "ISC"
+    },
     "node_modules/requires-port": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/requires-port/-/requires-port-1.0.0.tgz",
@@ -17646,6 +17932,12 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/set-blocking": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/set-blocking/-/set-blocking-2.0.0.tgz",
+      "integrity": "sha512-KiKBS8AnWGEyLzofFfmvKwpdPzqiy16LvQfK3yv/fVH7Bj13/wl3JSR1J+rfgRE9q7xUJK4qvgS8raSOeLUehw==",
+      "license": "ISC"
+    },
     "node_modules/setprototypeof": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.2.0.tgz",
@@ -19024,7 +19316,6 @@
       "version": "6.20.0",
       "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.20.0.tgz",
       "integrity": "sha512-Ny6QZ2Nju20vw1SRHe3d9jVu6gJ+4e3+MMpqu7pqE5HT6WsTSlce++GQmK5UXS8mzV8DSYHrQH+Xrf2jVcuKNg==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/unicode-canonical-property-names-ecmascript": {
@@ -19856,6 +20147,12 @@
         "node": ">= 8"
       }
     },
+    "node_modules/which-module": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-2.0.1.tgz",
+      "integrity": "sha512-iBdZ57RDvnOR9AGBhML2vFZf7h8vmBjhoaZqODJBFWHVtKkDmKuHai3cx5PgVMrX5YDNp27AofYbAwctSS+vhQ==",
+      "license": "ISC"
+    },
     "node_modules/wildcard": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/wildcard/-/wildcard-2.0.1.tgz",
@@ -19877,7 +20174,6 @@
       "version": "6.2.0",
       "resolved": "https://registry.npmjs.org/wrap-ansi/-/wrap-ansi-6.2.0.tgz",
       "integrity": "sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-styles": "^4.0.0",
@@ -19966,7 +20262,6 @@
       "version": "5.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-5.0.1.tgz",
       "integrity": "sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -19976,14 +20271,12 @@
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/emoji-regex/-/emoji-regex-8.0.0.tgz",
       "integrity": "sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==",
-      "dev": true,
       "license": "MIT"
     },
     "node_modules/wrap-ansi/node_modules/is-fullwidth-code-point": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
       "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==",
-      "dev": true,
       "license": "MIT",
       "engines": {
         "node": ">=8"
@@ -19993,7 +20286,6 @@
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
       "integrity": "sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "emoji-regex": "^8.0.0",
@@ -20008,7 +20300,6 @@
       "version": "6.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.1.tgz",
       "integrity": "sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "ansi-regex": "^5.0.1"

package.json

@@ -1,12 +1,12 @@
 {
   "name": "plebeian-signer",
-  "version": "v1.0.8",
+  "version": "v1.0.9",
   "custom": {
     "chrome": {
-      "version": "v1.0.8"
+      "version": "v1.0.9"
     },
     "firefox": {
-      "version": "v1.0.8"
+      "version": "v1.0.9"
     }
   },
   "scripts": {
@@ -36,13 +36,16 @@
     "@angular/platform-browser": "^19.0.0",
     "@angular/platform-browser-dynamic": "^19.0.0",
     "@angular/router": "^19.0.0",
+    "@cashu/cashu-ts": "^3.2.0",
     "@nostr-dev-kit/ndk": "^2.11.0",
     "@popperjs/core": "^2.11.8",
+    "@types/qrcode": "^1.5.6",
     "bootstrap": "^5.3.3",
     "bootstrap-icons": "^1.11.3",
     "buffer": "^6.0.3",
     "hash-wasm": "^4.11.0",
     "nostr-tools": "^2.10.4",
+    "qrcode": "^1.5.4",
     "rxjs": "~7.8.0",
     "tslib": "^2.3.0",
     "webextension-polyfill": "^0.12.0",
@@ -56,6 +59,7 @@
     "@types/bootstrap": "^5.2.10",
     "@types/chrome": "^0.0.293",
     "@types/jasmine": "~5.1.0",
+    "@types/uuid": "^10.0.0",
     "@types/webextension-polyfill": "^0.12.1",
     "angular-eslint": "19.0.2",
     "eslint": "^9.16.0",

projects/chrome/public/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 3,
   "name": "Plebeian Signer - Nostr Identity Manager & Signer",
   "description": "Manage and switch between multiple identities while interacting with Nostr apps",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "homepage_url": "https://github.com/PlebeianApp/plebeian-signer",
   "options_page": "options.html",
   "permissions": [

projects/chrome/src/app/app.routes.ts

@@ -12,6 +12,7 @@ import { SettingsComponent } from './components/home/settings/settings.component
 import { LogsComponent } from './components/home/logs/logs.component';
 import { BookmarksComponent } from './components/home/bookmarks/bookmarks.component';
 import { WalletComponent } from './components/home/wallet/wallet.component';
+import { BackupsComponent } from './components/home/backups/backups.component';
 import { NewIdentityComponent } from './components/new-identity/new-identity.component';
 import { EditIdentityComponent } from './components/edit-identity/edit-identity.component';
 import { HomeComponent as EditIdentityHomeComponent } from './components/edit-identity/home/home.component';
@@ -81,6 +82,10 @@ export const routes: Routes = [
         path: 'wallet',
         component: WalletComponent,
       },
+      {
+        path: 'backups',
+        component: BackupsComponent,
+      },
     ],
   },
   {

projects/chrome/src/app/common/data/chrome-sync-no-handler.ts

@@ -2,7 +2,9 @@
 import {
   BrowserSyncData,
   BrowserSyncHandler,
+  CashuMint_ENCRYPTED,
   Identity_ENCRYPTED,
+  NwcConnection_ENCRYPTED,
   Permission_ENCRYPTED,
   Relay_ENCRYPTED,
 } from '@common';
@@ -57,6 +59,20 @@ export class ChromeSyncNoHandler extends BrowserSyncHandler {
     this.setPartialData_Relays(data);
   }
 
+  async saveAndSetPartialData_NwcConnections(data: {
+    nwcConnections: NwcConnection_ENCRYPTED[];
+  }): Promise<void> {
+    await chrome.storage.local.set(data);
+    this.setPartialData_NwcConnections(data);
+  }
+
+  async saveAndSetPartialData_CashuMints(data: {
+    cashuMints: CashuMint_ENCRYPTED[];
+  }): Promise<void> {
+    await chrome.storage.local.set(data);
+    this.setPartialData_CashuMints(data);
+  }
+
   async clearData(): Promise<void> {
     const props = Object.keys(await this.loadUnmigratedData());
     await chrome.storage.local.remove(props);

projects/chrome/src/app/common/data/chrome-sync-yes-handler.ts

@@ -1,7 +1,9 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import {
   BrowserSyncData,
+  CashuMint_ENCRYPTED,
   Identity_ENCRYPTED,
+  NwcConnection_ENCRYPTED,
   Permission_ENCRYPTED,
   BrowserSyncHandler,
   Relay_ENCRYPTED,
@@ -49,6 +51,20 @@ export class ChromeSyncYesHandler extends BrowserSyncHandler {
     this.setPartialData_Relays(data);
   }
 
+  async saveAndSetPartialData_NwcConnections(data: {
+    nwcConnections: NwcConnection_ENCRYPTED[];
+  }): Promise<void> {
+    await chrome.storage.sync.set(data);
+    this.setPartialData_NwcConnections(data);
+  }
+
+  async saveAndSetPartialData_CashuMints(data: {
+    cashuMints: CashuMint_ENCRYPTED[];
+  }): Promise<void> {
+    await chrome.storage.sync.set(data);
+    this.setPartialData_CashuMints(data);
+  }
+
   async clearData(): Promise<void> {
     await chrome.storage.sync.clear();
   }

projects/chrome/src/app/components/home/backups/backups.component.html

@@ -0,0 +1,79 @@
+<div class="sam-text-header">
+  <button class="lock-btn" title="Lock" (click)="onClickLock()">
+    <span class="emoji">🔒</span>
+  </button>
+  <button class="back-btn" title="Go Back" (click)="goBack()">
+    <span class="emoji">←</span>
+  </button>
+  <span>Backups</span>
+</div>
+
+<div class="backup-settings">
+  <div class="setting-row">
+    <label for="maxBackups">Max Auto Backups:</label>
+    <input
+      id="maxBackups"
+      type="number"
+      [value]="maxBackups"
+      min="1"
+      max="20"
+      (change)="onMaxBackupsChange($event)"
+    />
+  </div>
+  <p class="setting-note">
+    Automatic backups are created when significant changes are made.
+    Manual and pre-restore backups are not counted toward this limit.
+  </p>
+</div>
+
+<button class="btn btn-primary create-btn" (click)="createManualBackup()">
+  Create Backup Now
+</button>
+
+<div class="backups-list">
+  @if (backups.length === 0) {
+    <div class="empty-state">
+      <span>No backups yet</span>
+    </div>
+  }
+  @for (backup of backups; track backup.id) {
+    <div class="backup-item">
+      <div class="backup-info">
+        <span class="backup-date">{{ formatDate(backup.createdAt) }}</span>
+        <div class="backup-meta">
+          <span class="backup-reason" [class]="getReasonClass(backup.reason)">
+            {{ getReasonLabel(backup.reason) }}
+          </span>
+          <span class="backup-identities">{{ backup.identityCount }} identity(ies)</span>
+        </div>
+      </div>
+      <div class="backup-actions">
+        <button
+          class="btn btn-sm btn-secondary"
+          (click)="
+            confirm.show(
+              'Restore this backup? A backup of your current state will be created first.',
+              restoreBackup.bind(this, backup.id)
+            )
+          "
+          [disabled]="restoringBackupId !== null"
+        >
+          {{ restoringBackupId === backup.id ? 'Restoring...' : 'Restore' }}
+        </button>
+        <button
+          class="btn btn-sm btn-danger"
+          (click)="
+            confirm.show(
+              'Delete this backup? This cannot be undone.',
+              deleteBackup.bind(this, backup.id)
+            )
+          "
+        >
+          Delete
+        </button>
+      </div>
+    </div>
+  }
+</div>
+
+<lib-confirm #confirm></lib-confirm>

projects/chrome/src/app/components/home/backups/backups.component.scss

@@ -0,0 +1,192 @@
+:host {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  padding: 8px;
+  gap: 12px;
+}
+
+.sam-text-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 18px;
+  font-weight: bold;
+  padding-bottom: 8px;
+  border-bottom: 1px solid var(--border);
+}
+
+.lock-btn,
+.back-btn {
+  background: none;
+  border: none;
+  cursor: pointer;
+  padding: 4px;
+  border-radius: 4px;
+
+  &:hover {
+    background: var(--muted);
+  }
+
+  .emoji {
+    font-size: 16px;
+  }
+}
+
+.backup-settings {
+  background: var(--muted);
+  padding: 12px;
+  border-radius: 8px;
+}
+
+.setting-row {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+
+  label {
+    font-weight: 500;
+  }
+
+  input[type="number"] {
+    width: 60px;
+    padding: 4px 8px;
+    border: 1px solid var(--border);
+    border-radius: 4px;
+    background: var(--background);
+    color: var(--foreground);
+  }
+}
+
+.setting-note {
+  margin-top: 8px;
+  font-size: 12px;
+  color: var(--muted-foreground);
+}
+
+.create-btn {
+  align-self: flex-start;
+}
+
+.backups-list {
+  flex: 1;
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.empty-state {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  height: 100px;
+  color: var(--muted-foreground);
+}
+
+.backup-item {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px;
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  gap: 12px;
+}
+
+.backup-info {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  flex: 1;
+  min-width: 0;
+}
+
+.backup-date {
+  font-weight: 500;
+  font-size: 13px;
+}
+
+.backup-meta {
+  display: flex;
+  gap: 8px;
+  font-size: 11px;
+}
+
+.backup-reason {
+  padding: 2px 6px;
+  border-radius: 4px;
+  font-weight: 500;
+
+  &.reason-auto {
+    background: var(--muted);
+    color: var(--muted-foreground);
+  }
+
+  &.reason-manual {
+    background: rgba(34, 197, 94, 0.2);
+    color: rgb(34, 197, 94);
+  }
+
+  &.reason-prerestore {
+    background: rgba(234, 179, 8, 0.2);
+    color: rgb(234, 179, 8);
+  }
+}
+
+.backup-identities {
+  color: var(--muted-foreground);
+}
+
+.backup-actions {
+  display: flex;
+  gap: 8px;
+  flex-shrink: 0;
+}
+
+.btn {
+  padding: 8px 16px;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+  font-weight: 500;
+  transition: background-color 0.2s;
+
+  &:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+  }
+}
+
+.btn-primary {
+  background: var(--primary);
+  color: var(--primary-foreground);
+
+  &:hover:not(:disabled) {
+    opacity: 0.9;
+  }
+}
+
+.btn-secondary {
+  background: var(--secondary);
+  color: var(--secondary-foreground);
+
+  &:hover:not(:disabled) {
+    background: var(--muted);
+  }
+}
+
+.btn-danger {
+  background: rgba(239, 68, 68, 0.2);
+  color: rgb(239, 68, 68);
+
+  &:hover:not(:disabled) {
+    background: rgba(239, 68, 68, 0.3);
+  }
+}
+
+.btn-sm {
+  padding: 4px 10px;
+  font-size: 12px;
+}

projects/chrome/src/app/components/home/backups/backups.component.ts

@@ -0,0 +1,126 @@
+import { Component, inject, OnInit } from '@angular/core';
+import { Router } from '@angular/router';
+import {
+  ConfirmComponent,
+  LoggerService,
+  SignerMetaData_VaultSnapshot,
+  StartupService,
+  StorageService,
+} from '@common';
+import { getNewStorageServiceConfig } from '../../../common/data/get-new-storage-service-config';
+
+@Component({
+  selector: 'app-backups',
+  templateUrl: './backups.component.html',
+  styleUrl: './backups.component.scss',
+  imports: [ConfirmComponent],
+})
+export class BackupsComponent implements OnInit {
+  readonly #router = inject(Router);
+  readonly #storage = inject(StorageService);
+  readonly #startup = inject(StartupService);
+  readonly #logger = inject(LoggerService);
+
+  backups: SignerMetaData_VaultSnapshot[] = [];
+  maxBackups = 5;
+  restoringBackupId: string | null = null;
+
+  ngOnInit(): void {
+    this.loadBackups();
+    this.maxBackups = this.#storage.getSignerMetaHandler().getMaxBackups();
+  }
+
+  loadBackups(): void {
+    this.backups = this.#storage.getSignerMetaHandler().getBackups();
+  }
+
+  async onMaxBackupsChange(event: Event): Promise<void> {
+    const input = event.target as HTMLInputElement;
+    const value = parseInt(input.value, 10);
+    if (!isNaN(value) && value >= 1 && value <= 20) {
+      this.maxBackups = value;
+      await this.#storage.getSignerMetaHandler().setMaxBackups(value);
+    }
+  }
+
+  async createManualBackup(): Promise<void> {
+    const browserSyncData = this.#storage.getBrowserSyncHandler().browserSyncData;
+    if (browserSyncData) {
+      await this.#storage.getSignerMetaHandler().createBackup(browserSyncData, 'manual');
+      this.loadBackups();
+    }
+  }
+
+  async restoreBackup(backupId: string): Promise<void> {
+    this.restoringBackupId = backupId;
+    try {
+      // First, create a pre-restore backup of current state
+      const currentData = this.#storage.getBrowserSyncHandler().browserSyncData;
+      if (currentData) {
+        await this.#storage.getSignerMetaHandler().createBackup(currentData, 'pre-restore');
+      }
+
+      // Get the backup data
+      const backupData = this.#storage.getSignerMetaHandler().getBackupData(backupId);
+      if (!backupData) {
+        throw new Error('Backup not found');
+      }
+
+      // Import the backup
+      await this.#storage.deleteVault(true);
+      await this.#storage.importVault(backupData);
+      this.#logger.logVaultImport('Backup Restore');
+      this.#storage.isInitialized = false;
+      this.#startup.startOver(getNewStorageServiceConfig());
+    } catch (error) {
+      console.error('Failed to restore backup:', error);
+      this.restoringBackupId = null;
+    }
+  }
+
+  async deleteBackup(backupId: string): Promise<void> {
+    await this.#storage.getSignerMetaHandler().deleteBackup(backupId);
+    this.loadBackups();
+  }
+
+  formatDate(isoDate: string): string {
+    const date = new Date(isoDate);
+    return date.toLocaleDateString() + ' ' + date.toLocaleTimeString();
+  }
+
+  getReasonLabel(reason?: string): string {
+    switch (reason) {
+      case 'auto':
+        return 'Auto';
+      case 'manual':
+        return 'Manual';
+      case 'pre-restore':
+        return 'Pre-Restore';
+      default:
+        return 'Unknown';
+    }
+  }
+
+  getReasonClass(reason?: string): string {
+    switch (reason) {
+      case 'auto':
+        return 'reason-auto';
+      case 'manual':
+        return 'reason-manual';
+      case 'pre-restore':
+        return 'reason-prerestore';
+      default:
+        return '';
+    }
+  }
+
+  goBack(): void {
+    this.#router.navigateByUrl('/home/settings');
+  }
+
+  async onClickLock(): Promise<void> {
+    this.#logger.logVaultLock();
+    await this.#storage.lockVault();
+    this.#router.navigateByUrl('/vault-login');
+  }
+}

projects/chrome/src/app/components/home/identity/identity.component.html

@@ -73,4 +73,12 @@
   </div>
 </div>
 
+<!-- About section -->
+@if (aboutText) {
+  <div class="about-section">
+    <div class="about-header">About</div>
+    <div class="about-content">{{ aboutText }}</div>
+  </div>
+}
+
 <lib-toast #toast></lib-toast>

projects/chrome/src/app/components/home/identity/identity.component.scss

@@ -185,4 +185,33 @@
       opacity: 1;
     }
   }
+
+  .about-section {
+    margin: var(--size);
+    margin-top: 0;
+    flex-shrink: 0;
+    max-height: 150px;
+    display: flex;
+    flex-direction: column;
+
+    .about-header {
+      font-size: 0.85rem;
+      font-weight: 600;
+      color: var(--muted-foreground);
+      margin-bottom: var(--size-h);
+    }
+
+    .about-content {
+      flex: 1;
+      overflow-y: auto;
+      font-size: 0.9rem;
+      line-height: 1.5;
+      color: var(--foreground);
+      background: var(--background-light);
+      border-radius: var(--radius-sm);
+      padding: var(--size);
+      white-space: pre-wrap;
+      word-break: break-word;
+    }
+  }
 }

projects/chrome/src/app/components/home/identity/identity.component.ts

@@ -52,6 +52,10 @@ export class IdentityComponent implements OnInit {
     return this.profile?.banner;
   }
 
+  get aboutText(): string | undefined {
+    return this.profile?.about;
+  }
+
   copyToClipboard(pubkey: string | undefined) {
     if (!pubkey) {
       return;

projects/chrome/src/app/components/home/settings/settings.component.html

@@ -5,7 +5,13 @@
   <span> Settings </span>
 </div>
 
-<span>SYNC: {{ syncFlow }}</span>
+<div class="sync-info">
+  <span class="sync-label">SYNC: {{ syncFlow }}</span>
+  <p class="sync-note">
+    To change sync mode, export your vault, reset the extension,
+    and re-import with the desired sync setting.
+  </p>
+</div>
 
 <button class="btn btn-primary" (click)="onClickExportVault()">
   Export Vault
@@ -15,6 +21,7 @@
   Import Vault
 </button>
 
+<lib-nav-item text="💾 Backups" (click)="navigate('/home/backups')"></lib-nav-item>
 <lib-nav-item text="🪵 Logs" (click)="navigate('/home/logs')"></lib-nav-item>
 <lib-nav-item text="💡 Info" (click)="navigate('/home/info')"></lib-nav-item>
 

projects/chrome/src/app/components/home/settings/settings.component.scss

@@ -15,3 +15,17 @@
     visibility: hidden;
   }
 }
+
+.sync-info {
+  .sync-label {
+    display: block;
+    font-weight: 500;
+  }
+
+  .sync-note {
+    margin: var(--size-h) 0 0 0;
+    font-size: 0.85rem;
+    color: var(--muted-foreground);
+    line-height: 1.4;
+  }
+}

projects/chrome/src/app/components/home/wallet/wallet.component.html

@@ -2,13 +2,652 @@
   <button class="lock-btn" title="Lock" (click)="onClickLock()">
     <span class="emoji">🔒</span>
   </button>
-  <span>Wallet</span>
+  @if (showBackButton) {
+    <button class="back-btn" title="Go Back" (click)="goBack()">
+      <span class="emoji">←</span>
+    </button>
+  }
+  <span>{{ title }}</span>
+  <div class="section-btns">
+    <button
+      class="section-btn"
+      [class.active]="activeSection.startsWith('cashu')"
+      title="Cashu"
+      (click)="setSection('cashu')"
+    >
+      <span class="emoji">🥜</span>
+    </button>
+    <button
+      class="section-btn"
+      [class.active]="activeSection.startsWith('lightning')"
+      title="Lightning"
+      (click)="setSection('lightning')"
+    >
+      <span class="emoji">⚡</span>
+    </button>
+  </div>
 </div>
 
 <div class="wallet-container">
+  <!-- Main wallet menu -->
+  @if (activeSection === 'main') {
+    <div class="wallet-menu">
+      <button class="wallet-menu-item" (click)="setSection('cashu')">
+        <span class="emoji">🥜</span>
+        <span class="label">Cashu</span>
+        <span class="balance">{{ formatCashuBalance(totalCashuBalance) }} sats</span>
+      </button>
+      <button class="wallet-menu-item" (click)="setSection('lightning')">
+        <span class="emoji">⚡</span>
+        <span class="label">Lightning</span>
+        <span class="balance">{{ formatBalance(totalLightningBalance) }} sats</span>
+      </button>
+    </div>
+  }
+
+  <!-- Cashu mint list -->
+  @else if (activeSection === 'cashu') {
+    <div class="lightning-section">
+      @if (mints.length === 0) {
+        <div class="cashu-onboarding">
+          @if (showCashuInfo) {
+            <div class="info-panel">
+              <h3>Welcome to Cashu Wallet</h3>
+
+              <div class="info-section">
+                <h4>Storage Considerations</h4>
+                @if (currentSyncFlow === BrowserSyncFlow.BROWSER_SYNC) {
+                  <div class="warning-box">
+                    <p><strong>Browser Sync is enabled</strong></p>
+                    <p>
+                      Sync storage is limited to ~100KB shared across all your vault data
+                      (identities, permissions, relays, and Cashu tokens). This limits
+                      your Cashu wallet to approximately 300-400 tokens.
+                    </p>
+                    <p>
+                      For larger Cashu holdings, consider disabling browser sync which
+                      provides ~5MB of local storage (~18,000+ tokens).
+                    </p>
+                    <button class="link-btn" (click)="navigateToSettings()">
+                      Change Sync Settings
+                    </button>
+                  </div>
+                } @else {
+                  <div class="success-box">
+                    <p><strong>Local Storage Mode</strong></p>
+                    <p>
+                      You have ~5MB of local storage available, which can hold
+                      thousands of Cashu tokens. Your data stays on this device only.
+                    </p>
+                  </div>
+                }
+              </div>
+
+              <div class="info-section">
+                <h4>Backup Your Wallet</h4>
+                <p>
+                  <strong>Important:</strong> Cashu tokens are bearer assets.
+                  If you lose your vault backup, you lose your tokens permanently.
+                </p>
+                <p>
+                  Vault exports are saved to your browser's downloads folder.
+                  Configure this to point to either:
+                </p>
+                <ul>
+                  <li>Your backup storage device (external drive, NAS)</li>
+                  <li>A folder synced by your backup tool (Syncthing, rsync, etc.)</li>
+                </ul>
+                <p class="browser-url">
+                  <code>{{ browserDownloadSettingsUrl }}</code>
+                </p>
+                <button class="link-btn" (click)="navigateToSettings()">
+                  Go to Backup Settings
+                </button>
+              </div>
+
+              <button class="dismiss-btn" (click)="dismissCashuInfo()">
+                Got it, let me add a mint
+              </button>
+            </div>
+          } @else {
+            <div class="empty-state">
+              <span class="sam-text-muted">No mints connected yet.</span>
+              <button class="show-info-btn" (click)="showCashuInfo = true">
+                Show storage info
+              </button>
+            </div>
+          }
+        </div>
+      } @else {
+        <div class="wallet-list">
+          @for (mint of mints; track mint.id) {
+            <button class="wallet-list-item" (click)="selectMint(mint.id)">
+              <span class="wallet-name">{{ mint.name }}</span>
+              <span class="wallet-balance">{{ formatCashuBalance(mint.cachedBalance) }} sats</span>
+            </button>
+          }
+        </div>
+      }
+      <button class="add-wallet-btn" (click)="showAddMint()">
+        <span class="emoji">+</span>
+        <span>Add Mint</span>
+      </button>
+    </div>
+  }
+
+  <!-- Cashu mint detail -->
+  @else if (activeSection === 'cashu-detail' && selectedMint) {
+    <div class="wallet-detail">
+      <div class="balance-row">
+        <div class="balance-display compact">
+          <span class="balance-value">{{ formatCashuBalance(selectedMintBalance) }}</span>
+          <span class="balance-unit">sats</span>
+        </div>
+        <button
+          class="refresh-icon-btn"
+          (click)="refreshMint()"
+          [disabled]="refreshingMint"
+          title="Refresh"
+        >
+          <span class="emoji" [class.spinning]="refreshingMint">🔄</span>
+        </button>
+      </div>
+      @if (refreshError) {
+        <div class="error-message small">{{ refreshError }}</div>
+      }
+      <div class="action-buttons">
+        <button class="action-btn deposit-btn" (click)="showDeposit()">
+          Deposit
+        </button>
+        <button class="action-btn receive-btn" (click)="showReceive()">
+          Receive
+        </button>
+        <button class="action-btn send-btn" (click)="showSend()" [disabled]="selectedMintBalance === 0">
+          Send
+        </button>
+      </div>
+
+      <!-- Token viewer section -->
+      <div class="token-section">
+        <div class="section-title">Tokens ({{ selectedMintProofs.length }})</div>
+        @if (selectedMintProofs.length === 0) {
+          <div class="empty-text">No tokens stored</div>
+        } @else {
+          <div class="token-list">
+            @for (proof of selectedMintProofs; track proof.secret) {
+              <div class="token-item">
+                <span class="token-amount">{{ proof.amount }}</span>
+                <span class="token-time">{{ formatProofTime(proof.receivedAt) }}</span>
+              </div>
+            }
+          </div>
+        }
+      </div>
+
+      <div class="wallet-info">
+        <div class="info-row">
+          <span class="info-label">Mint URL</span>
+          <span class="info-value">{{ selectedMint.mintUrl }}</span>
+        </div>
+        <div class="info-row">
+          <span class="info-label">Unit</span>
+          <span class="info-value">{{ selectedMint.unit }}</span>
+        </div>
+      </div>
+      <button class="delete-btn" (click)="deleteMint()">
+        Delete Mint
+      </button>
+    </div>
+  }
+
+  <!-- Cashu add mint form -->
+  @else if (activeSection === 'cashu-add') {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="mintName">Mint Name</label>
+        <input
+          id="mintName"
+          type="text"
+          [(ngModel)]="newMintName"
+          placeholder="My Mint"
+          [disabled]="addingMint"
+        />
+      </div>
+      <div class="form-group">
+        <label for="mintUrl">Mint URL</label>
+        <input
+          id="mintUrl"
+          type="text"
+          [(ngModel)]="newMintUrl"
+          placeholder="https://mint.example.com"
+          [disabled]="addingMint"
+        />
+      </div>
+      @if (mintError) {
+        <div class="error-message">{{ mintError }}</div>
+      }
+      @if (mintTestResult) {
+        <div class="success-message">{{ mintTestResult }}</div>
+      }
+      <div class="form-actions">
+        <button
+          class="test-btn"
+          (click)="testMint()"
+          [disabled]="testingMint || addingMint"
+        >
+          {{ testingMint ? 'Testing...' : 'Test Connection' }}
+        </button>
+        <button
+          class="add-btn"
+          (click)="addMint()"
+          [disabled]="addingMint"
+        >
+          {{ addingMint ? 'Adding...' : 'Add Mint' }}
+        </button>
+      </div>
+    </div>
+  }
+
+  <!-- Cashu receive token -->
+  @else if (activeSection === 'cashu-receive') {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="receiveToken">Paste Cashu Token</label>
+        <textarea
+          id="receiveToken"
+          [(ngModel)]="receiveToken"
+          placeholder="cashuB..."
+          rows="5"
+          [disabled]="receivingToken"
+        ></textarea>
+      </div>
+      @if (receiveError) {
+        <div class="error-message">{{ receiveError }}</div>
+      }
+      @if (receiveResult) {
+        <div class="success-message">{{ receiveResult }}</div>
+      }
+      <div class="form-actions">
+        <button
+          class="add-btn full-width"
+          (click)="receiveTokens()"
+          [disabled]="receivingToken"
+        >
+          {{ receivingToken ? 'Receiving...' : 'Receive Tokens' }}
+        </button>
+      </div>
+    </div>
+  }
+
+  <!-- Cashu send token -->
+  @else if (activeSection === 'cashu-send') {
+    <div class="add-wallet-form">
+      <div class="balance-info">
+        Available: {{ formatCashuBalance(selectedMintBalance) }} sats
+      </div>
+      <div class="form-group">
+        <label for="sendAmount">Amount (sats)</label>
+        <input
+          id="sendAmount"
+          type="number"
+          [(ngModel)]="sendAmount"
+          placeholder="0"
+          min="1"
+          [max]="selectedMintBalance"
+          [disabled]="sendingToken"
+        />
+      </div>
+      @if (sendError) {
+        <div class="error-message">{{ sendError }}</div>
+      }
+      @if (sendResult) {
+        <div class="token-result">
+          <span class="token-label">Token to Share</span>
+          <textarea readonly rows="4">{{ sendResult }}</textarea>
+          <button class="copy-btn" (click)="copyToken()">
+            Copy Token
+          </button>
+        </div>
+      }
+      @if (!sendResult) {
+        <div class="form-actions">
+          <button
+            class="add-btn full-width"
+            (click)="sendTokens()"
+            [disabled]="sendingToken || sendAmount <= 0"
+          >
+            {{ sendingToken ? 'Creating...' : 'Create Token' }}
+          </button>
+        </div>
+      }
+    </div>
+  }
+
+  <!-- Cashu deposit (mint via Lightning) -->
+  @else if (activeSection === 'cashu-mint' && selectedMint) {
+    <div class="add-wallet-form">
+      @if (!depositInvoice) {
+        <div class="form-group">
+          <label for="depositAmount">Amount (sats)</label>
+          <input
+            id="depositAmount"
+            type="number"
+            [(ngModel)]="depositAmount"
+            placeholder="1000"
+            min="1"
+            [disabled]="creatingDepositQuote"
+          />
+        </div>
+        @if (depositError) {
+          <div class="error-message">{{ depositError }}</div>
+        }
+        <div class="form-actions">
+          <button
+            class="add-btn full-width"
+            (click)="createDepositInvoice()"
+            [disabled]="creatingDepositQuote || depositAmount <= 0"
+          >
+            {{ creatingDepositQuote ? 'Creating...' : 'Create Invoice' }}
+          </button>
+        </div>
+      }
+      @if (depositInvoice) {
+        <div class="invoice-result">
+          @if (depositInvoiceQr) {
+            <img [src]="depositInvoiceQr" alt="Invoice QR Code" class="qr-code" />
+          }
+          <div class="deposit-status">
+            @if (depositQuoteState === 'UNPAID') {
+              <span class="status-waiting">Waiting for payment...</span>
+              @if (checkingDepositPayment) {
+                <span class="status-checking">checking</span>
+              }
+            } @else if (depositQuoteState === 'PAID') {
+              <span class="status-paid">Payment received! Claiming tokens...</span>
+            } @else if (depositQuoteState === 'ISSUED') {
+              <span class="status-issued">✓ Tokens received!</span>
+            }
+          </div>
+          @if (depositError) {
+            <div class="error-message">{{ depositError }}</div>
+          }
+          @if (depositSuccess) {
+            <div class="success-message">{{ depositSuccess }}</div>
+          }
+          @if (depositQuoteState === 'UNPAID') {
+            <div class="invoice-text">{{ depositInvoice }}</div>
+            <button class="copy-btn" (click)="copyDepositInvoice()">
+              Copy Invoice
+            </button>
+          }
+        </div>
+      }
+    </div>
+  }
+
+  <!-- Lightning wallet list -->
+  @else if (activeSection === 'lightning') {
+    <div class="lightning-section">
+      @if (connections.length === 0) {
         <div class="empty-state">
           <span class="sam-text-muted">
-      Wallet functionality coming soon.
+            No wallets connected yet.
           </span>
         </div>
+      } @else {
+        <div class="wallet-list">
+          @for (conn of connections; track conn.id) {
+            <button class="wallet-list-item" (click)="selectConnection(conn.id)">
+              <span class="wallet-name">{{ conn.name }}</span>
+              <span class="wallet-balance">{{ formatBalance(conn.cachedBalance) }} sats</span>
+            </button>
+          }
+        </div>
+      }
+      <button class="add-wallet-btn" (click)="showAddConnection()">
+        <span class="emoji">+</span>
+        <span>Add NWC Connection</span>
+      </button>
+    </div>
+  }
+
+  <!-- Lightning wallet detail -->
+  @else if (activeSection === 'lightning-detail' && selectedConnection) {
+    <div class="wallet-detail">
+      <div class="balance-row">
+        <div class="balance-display compact">
+          <span class="balance-value">{{ formatBalance(selectedConnection.cachedBalance) }}</span>
+          <span class="balance-unit">sats</span>
+        </div>
+        <button class="refresh-icon-btn" (click)="refreshWallet()" title="Refresh">
+          <span class="emoji">🔄</span>
+        </button>
+      </div>
+
+      <div class="action-buttons">
+        <button class="action-btn receive-btn" (click)="showLnReceive()">
+          Receive
+        </button>
+        <button class="action-btn send-btn" (click)="showLnPay()">
+          Pay
+        </button>
+      </div>
+
+      <div class="wallet-info">
+        <div class="info-row">
+          <span class="info-label">Relay</span>
+          <span class="info-value">{{ selectedConnection.relayUrl }}</span>
+        </div>
+        @if (selectedConnection.lud16) {
+          <button class="info-row-btn" (click)="copyLightningAddress()">
+            <span class="info-label">Lightning Address</span>
+            <span class="info-value">
+              {{ selectedConnection.lud16 }}
+              <span class="copy-hint">{{ addressCopied ? '✓ Copied' : '(tap to copy)' }}</span>
+            </span>
+          </button>
+        }
+      </div>
+
+      <!-- Transaction History -->
+      <div class="transaction-section">
+        <div class="section-title">Transactions</div>
+        @if (loadingTransactions) {
+          <div class="loading-text">Loading...</div>
+        } @else if (transactionsNotSupported) {
+          <div class="not-supported-text">Transaction history not supported by this wallet</div>
+        } @else if (transactionsError) {
+          <div class="error-text">{{ transactionsError }}</div>
+        } @else if (transactions.length === 0) {
+          <div class="empty-text">No transactions yet</div>
+        } @else {
+          <div class="transaction-list">
+            @for (tx of transactions; track tx.payment_hash) {
+              <div class="transaction-item" [class.incoming]="tx.type === 'incoming'" [class.outgoing]="tx.type === 'outgoing'">
+                <span class="tx-icon">{{ tx.type === 'incoming' ? '⬇' : '⬆' }}</span>
+                <span class="tx-type">{{ tx.type === 'incoming' ? 'Received' : 'Sent' }}</span>
+                <span class="tx-amount">{{ formatBalance(tx.amount) }}</span>
+                <span class="tx-time">{{ formatTransactionTime(tx.created_at) }}</span>
+              </div>
+            }
+          </div>
+        }
+      </div>
+
+      <button class="delete-btn-small" (click)="deleteConnection()">
+        Delete Wallet
+      </button>
+    </div>
+  }
+
+  <!-- Lightning receive invoice -->
+  @else if (activeSection === 'lightning-receive' && selectedConnection) {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="lnReceiveAmount">Amount (sats)</label>
+        <input
+          id="lnReceiveAmount"
+          type="number"
+          [(ngModel)]="lnReceiveAmount"
+          placeholder="1000"
+          min="1"
+          [disabled]="generatingInvoice"
+        />
+      </div>
+      <div class="form-group">
+        <label for="lnReceiveDescription">Description (optional)</label>
+        <input
+          id="lnReceiveDescription"
+          type="text"
+          [(ngModel)]="lnReceiveDescription"
+          placeholder="Payment for..."
+          [disabled]="generatingInvoice"
+        />
+      </div>
+      @if (lnReceiveError) {
+        <div class="error-message">{{ lnReceiveError }}</div>
+      }
+      @if (!generatedInvoice) {
+        <div class="form-actions">
+          <button
+            class="add-btn full-width"
+            (click)="createReceiveInvoice()"
+            [disabled]="generatingInvoice || lnReceiveAmount <= 0"
+          >
+            {{ generatingInvoice ? 'Generating...' : 'Generate Invoice' }}
+          </button>
+        </div>
+      }
+      @if (generatedInvoice) {
+        <div class="invoice-result">
+          @if (generatedInvoiceQr) {
+            <img [src]="generatedInvoiceQr" alt="Invoice QR Code" class="qr-code" />
+          }
+          <div class="invoice-text">{{ generatedInvoice }}</div>
+          <button class="copy-btn" (click)="copyInvoice()">
+            {{ invoiceCopied ? 'Copied!' : 'Copy Invoice' }}
+          </button>
+        </div>
+      }
+    </div>
+  }
+
+  <!-- Pay Modal Overlay -->
+  @if (showPayModal && selectedConnection) {
+    <div class="modal-overlay" role="dialog" aria-modal="true" tabindex="-1" (click)="closePayModal()" (keydown.escape)="closePayModal()">
+      <div class="modal-content" role="document" (click)="$event.stopPropagation()" (keydown)="$event.stopPropagation()">
+        <div class="modal-header">
+          <span>Pay Invoice</span>
+          <button class="modal-close" (click)="closePayModal()">×</button>
+        </div>
+        <div class="modal-body">
+          <div class="form-group">
+            <label for="payInput">Lightning Address or Invoice</label>
+            <textarea
+              id="payInput"
+              [(ngModel)]="payInput"
+              placeholder="user@domain.com or lnbc1..."
+              rows="3"
+              [disabled]="paying"
+            ></textarea>
+          </div>
+          <div class="form-group">
+            <label for="payAmount">Amount (sats) - required for addresses</label>
+            <input
+              id="payAmount"
+              type="number"
+              [(ngModel)]="payAmount"
+              placeholder="Optional for invoices"
+              min="1"
+              [disabled]="paying"
+            />
+          </div>
+          @if (paymentError) {
+            <div class="error-message">{{ paymentError }}</div>
+          }
+          @if (paymentSuccess) {
+            <div class="success-message payment-success">Payment Successful!</div>
+          }
+          @if (!paymentSuccess) {
+            <div class="form-actions">
+              <button class="test-btn" (click)="closePayModal()" [disabled]="paying">
+                Cancel
+              </button>
+              <button
+                class="add-btn"
+                (click)="payInvoiceOrAddress()"
+                [disabled]="paying || !payInput.trim()"
+              >
+                {{ paying ? 'Paying...' : 'Pay' }}
+              </button>
+            </div>
+          }
+        </div>
+      </div>
+    </div>
+  }
+
+  <!-- Add wallet form -->
+  @else if (activeSection === 'lightning-add') {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="walletName">Wallet Name</label>
+        <input
+          id="walletName"
+          type="text"
+          [(ngModel)]="newWalletName"
+          placeholder="My Lightning Wallet"
+          [disabled]="addingConnection"
+        />
+      </div>
+      <div class="form-group">
+        <label for="walletUrl">NWC Connection URL</label>
+        <textarea
+          id="walletUrl"
+          [(ngModel)]="newWalletUrl"
+          placeholder="nostr+walletconnect://..."
+          rows="3"
+          [disabled]="addingConnection"
+        ></textarea>
+      </div>
+      @if (connectionError) {
+        <div class="error-message">{{ connectionError }}</div>
+      }
+      @if (connectionTestResult) {
+        <div class="success-message">{{ connectionTestResult }}</div>
+      }
+      @if (nwcService.logs.length > 0) {
+        <div class="nwc-log">
+          <div class="log-header">
+            <span>Connection Log</span>
+            <button class="log-clear-btn" (click)="nwcService.clearLogs()">Clear</button>
+          </div>
+          <div class="log-entries">
+            @for (entry of nwcService.logs; track entry.timestamp) {
+              <div class="log-entry" [class.log-warn]="entry.level === 'warn'" [class.log-error]="entry.level === 'error'">
+                <span class="log-time">{{ entry.timestamp | date:'HH:mm:ss' }}</span>
+                <span class="log-message">{{ entry.message }}</span>
+              </div>
+            }
+          </div>
+        </div>
+      }
+      <div class="form-actions">
+        <button
+          class="test-btn"
+          (click)="testConnection()"
+          [disabled]="testingConnection || addingConnection"
+        >
+          {{ testingConnection ? 'Testing...' : 'Test Connection' }}
+        </button>
+        <button
+          class="add-btn"
+          (click)="addConnection()"
+          [disabled]="addingConnection"
+        >
+          {{ addingConnection ? 'Adding...' : 'Add Wallet' }}
+        </button>
+      </div>
+    </div>
+  }
 </div>

projects/chrome/src/app/components/home/wallet/wallet.component.ts

@@ -1,21 +1,952 @@
-import { Component, inject } from '@angular/core';
+import { Component, inject, OnInit, OnDestroy } from '@angular/core';
 import { Router } from '@angular/router';
-import { LoggerService, StorageService } from '@common';
+import { FormsModule } from '@angular/forms';
+import { CommonModule } from '@angular/common';
+import {
+  LoggerService,
+  StorageService,
+  NwcService,
+  NwcConnection_DECRYPTED,
+  CashuService,
+  CashuMint_DECRYPTED,
+  CashuProof,
+  NwcLookupInvoiceResult,
+  BrowserSyncFlow,
+} from '@common';
+import * as QRCode from 'qrcode';
+
+type WalletSection =
+  | 'main'
+  | 'cashu'
+  | 'cashu-detail'
+  | 'cashu-add'
+  | 'cashu-receive'
+  | 'cashu-send'
+  | 'cashu-mint'
+  | 'lightning'
+  | 'lightning-detail'
+  | 'lightning-add'
+  | 'lightning-receive'
+  | 'lightning-pay';
 
 @Component({
   selector: 'app-wallet',
   templateUrl: './wallet.component.html',
   styleUrl: './wallet.component.scss',
-  imports: [],
+  imports: [CommonModule, FormsModule],
 })
-export class WalletComponent {
+export class WalletComponent implements OnInit, OnDestroy {
   readonly #logger = inject(LoggerService);
   readonly #storage = inject(StorageService);
   readonly #router = inject(Router);
+  readonly nwcService = inject(NwcService);
+  readonly cashuService = inject(CashuService);
+
+  activeSection: WalletSection = 'main';
+  selectedConnectionId: string | null = null;
+  selectedMintId: string | null = null;
+
+  // Form fields for adding new NWC connection
+  newWalletName = '';
+  newWalletUrl = '';
+  addingConnection = false;
+  testingConnection = false;
+  connectionError = '';
+  connectionTestResult = '';
+
+  // Form fields for adding new Cashu mint
+  newMintName = '';
+  newMintUrl = '';
+  addingMint = false;
+  testingMint = false;
+  mintError = '';
+  mintTestResult = '';
+
+  // Cashu receive/send fields
+  receiveToken = '';
+  receivingToken = false;
+  receiveError = '';
+  receiveResult = '';
+  sendAmount = 0;
+  sendingToken = false;
+  sendError = '';
+  sendResult = '';
+
+  // Cashu mint (deposit) fields
+  depositAmount = 0;
+  creatingDepositQuote = false;
+  depositQuoteId = '';
+  depositInvoice = '';
+  depositInvoiceQr = '';
+  depositError = '';
+  depositSuccess = '';
+  checkingDepositPayment = false;
+  depositQuoteState: 'UNPAID' | 'PAID' | 'ISSUED' = 'UNPAID';
+  private depositPollingInterval: ReturnType<typeof setInterval> | null = null;
+
+  // Loading states
+  loadingBalances = false;
+  balanceError = '';
+
+  // Lightning transaction history
+  transactions: NwcLookupInvoiceResult[] = [];
+  loadingTransactions = false;
+  transactionsError = '';
+  transactionsNotSupported = false;
+
+  // Lightning receive
+  lnReceiveAmount = 0;
+  lnReceiveDescription = '';
+  generatingInvoice = false;
+  generatedInvoice = '';
+  generatedInvoiceQr = '';
+  lnReceiveError = '';
+  invoiceCopied = false;
+
+  // Lightning pay
+  showPayModal = false;
+  payInput = '';
+  payAmount = 0;
+  paying = false;
+  paymentSuccess = false;
+  paymentError = '';
+
+  // Clipboard feedback
+  addressCopied = false;
+
+  // Cashu onboarding info
+  showCashuInfo = true;
+  currentSyncFlow: BrowserSyncFlow = BrowserSyncFlow.NO_SYNC;
+  readonly BrowserSyncFlow = BrowserSyncFlow; // Expose enum to template
+  readonly browserDownloadSettingsUrl = 'chrome://settings/downloads';
+
+  // Cashu mint refresh
+  refreshingMint = false;
+  refreshError = '';
+
+  get title(): string {
+    switch (this.activeSection) {
+      case 'cashu':
+        return 'Cashu';
+      case 'cashu-detail':
+        return this.selectedMint?.name ?? 'Mint';
+      case 'cashu-add':
+        return 'Add Mint';
+      case 'cashu-receive':
+        return 'Receive';
+      case 'cashu-send':
+        return 'Send';
+      case 'cashu-mint':
+        return 'Deposit';
+      case 'lightning':
+        return 'Lightning';
+      case 'lightning-detail':
+        return this.selectedConnection?.name ?? 'Wallet';
+      case 'lightning-add':
+        return 'Add Wallet';
+      case 'lightning-receive':
+        return 'Receive';
+      case 'lightning-pay':
+        return 'Pay';
+      default:
+        return 'Wallet';
+    }
+  }
+
+  get showBackButton(): boolean {
+    return this.activeSection !== 'main';
+  }
+
+  get connections(): NwcConnection_DECRYPTED[] {
+    return this.nwcService.getConnections();
+  }
+
+  get selectedConnection(): NwcConnection_DECRYPTED | undefined {
+    if (!this.selectedConnectionId) return undefined;
+    return this.nwcService.getConnection(this.selectedConnectionId);
+  }
+
+  get totalLightningBalance(): number {
+    return this.nwcService.getCachedTotalBalance();
+  }
+
+  get mints(): CashuMint_DECRYPTED[] {
+    return this.cashuService.getMints();
+  }
+
+  get selectedMint(): CashuMint_DECRYPTED | undefined {
+    if (!this.selectedMintId) return undefined;
+    return this.cashuService.getMint(this.selectedMintId);
+  }
+
+  get totalCashuBalance(): number {
+    return this.cashuService.getCachedTotalBalance();
+  }
+
+  get selectedMintBalance(): number {
+    if (!this.selectedMintId) return 0;
+    return this.cashuService.getBalance(this.selectedMintId);
+  }
+
+  get selectedMintProofs(): CashuProof[] {
+    if (!this.selectedMintId) return [];
+    return this.cashuService.getProofs(this.selectedMintId);
+  }
+
+  ngOnInit(): void {
+    // Load current sync flow setting
+    this.currentSyncFlow = this.#storage.getSyncFlow();
+
+    // Refresh balances on init if we have connections
+    if (this.connections.length > 0) {
+      this.refreshAllBalances();
+    }
+  }
+
+  ngOnDestroy(): void {
+    this.nwcService.disconnectAll();
+    this.stopDepositPolling();
+  }
+
+  setSection(section: WalletSection) {
+    this.activeSection = section;
+    this.connectionError = '';
+    this.connectionTestResult = '';
+  }
+
+  goBack() {
+    switch (this.activeSection) {
+      case 'lightning-detail':
+      case 'lightning-add':
+        this.activeSection = 'lightning';
+        this.selectedConnectionId = null;
+        this.resetAddForm();
+        this.resetLightningForms();
+        break;
+      case 'lightning-receive':
+      case 'lightning-pay':
+        this.activeSection = 'lightning-detail';
+        this.resetLightningForms();
+        break;
+      case 'cashu-detail':
+      case 'cashu-add':
+        this.activeSection = 'cashu';
+        this.selectedMintId = null;
+        this.resetAddMintForm();
+        break;
+      case 'cashu-receive':
+      case 'cashu-send':
+      case 'cashu-mint':
+        this.activeSection = 'cashu-detail';
+        this.resetReceiveSendForm();
+        this.resetDepositForm();
+        break;
+      case 'lightning':
+      case 'cashu':
+        this.activeSection = 'main';
+        break;
+    }
+  }
+
+  selectConnection(connectionId: string) {
+    this.selectedConnectionId = connectionId;
+    this.activeSection = 'lightning-detail';
+    this.loadTransactions(connectionId);
+  }
+
+  private resetLightningForms() {
+    this.lnReceiveAmount = 0;
+    this.lnReceiveDescription = '';
+    this.generatingInvoice = false;
+    this.generatedInvoice = '';
+    this.generatedInvoiceQr = '';
+    this.lnReceiveError = '';
+    this.invoiceCopied = false;
+    this.payInput = '';
+    this.payAmount = 0;
+    this.paying = false;
+    this.paymentSuccess = false;
+    this.paymentError = '';
+    this.showPayModal = false;
+  }
+
+  showAddConnection() {
+    this.resetAddForm();
+    this.activeSection = 'lightning-add';
+  }
+
+  private resetAddForm() {
+    this.newWalletName = '';
+    this.newWalletUrl = '';
+    this.connectionError = '';
+    this.connectionTestResult = '';
+    this.addingConnection = false;
+    this.testingConnection = false;
+  }
+
+  async testConnection() {
+    if (!this.newWalletUrl.trim()) {
+      this.connectionError = 'Please enter an NWC URL';
+      return;
+    }
+
+    this.testingConnection = true;
+    this.connectionError = '';
+    this.connectionTestResult = '';
+    this.nwcService.clearLogs();
+
+    try {
+      const info = await this.nwcService.testConnection(this.newWalletUrl);
+      this.connectionTestResult = `Connected! ${info.alias ? 'Wallet: ' + info.alias : ''}`;
+      // Hide logs on success
+      this.nwcService.clearLogs();
+    } catch (error) {
+      this.connectionError =
+        error instanceof Error ? error.message : 'Connection test failed';
+      // Keep logs visible on failure for debugging
+    } finally {
+      this.testingConnection = false;
+    }
+  }
+
+  async addConnection() {
+    if (!this.newWalletName.trim()) {
+      this.connectionError = 'Please enter a wallet name';
+      return;
+    }
+    if (!this.newWalletUrl.trim()) {
+      this.connectionError = 'Please enter an NWC URL';
+      return;
+    }
+
+    this.addingConnection = true;
+    this.connectionError = '';
+
+    try {
+      await this.nwcService.addConnection(
+        this.newWalletName.trim(),
+        this.newWalletUrl.trim()
+      );
+
+      // Refresh the balance for the new connection
+      const connections = this.nwcService.getConnections();
+      const newConnection = connections[connections.length - 1];
+      if (newConnection) {
+        try {
+          await this.nwcService.getBalance(newConnection.id);
+        } catch {
+          // Ignore balance fetch error
+        }
+      }
+
+      this.goBack();
+    } catch (error) {
+      this.connectionError =
+        error instanceof Error ? error.message : 'Failed to add connection';
+    } finally {
+      this.addingConnection = false;
+    }
+  }
+
+  async deleteConnection() {
+    if (!this.selectedConnectionId) return;
+
+    const connection = this.selectedConnection;
+    if (
+      !confirm(`Delete wallet "${connection?.name}"? This cannot be undone.`)
+    ) {
+      return;
+    }
+
+    try {
+      await this.nwcService.deleteConnection(this.selectedConnectionId);
+      this.goBack();
+    } catch (error) {
+      console.error('Failed to delete connection:', error);
+    }
+  }
+
+  // Cashu methods
+
+  selectMint(mintId: string) {
+    this.selectedMintId = mintId;
+    this.activeSection = 'cashu-detail';
+    // Auto-refresh to check for spent proofs
+    this.refreshMint();
+  }
+
+  async refreshMint() {
+    if (!this.selectedMintId || this.refreshingMint) return;
+
+    this.refreshingMint = true;
+    this.refreshError = '';
+
+    try {
+      const removedAmount = await this.cashuService.checkProofsSpent(this.selectedMintId);
+      if (removedAmount > 0) {
+        // Balance was updated, proofs were spent
+        console.log(`Removed ${removedAmount} sats of spent proofs`);
+      }
+    } catch (error) {
+      this.refreshError = error instanceof Error ? error.message : 'Failed to refresh';
+      console.error('Failed to refresh mint:', error);
+    } finally {
+      this.refreshingMint = false;
+    }
+  }
+
+  showAddMint() {
+    this.resetAddMintForm();
+    this.activeSection = 'cashu-add';
+  }
+
+  showReceive() {
+    this.resetReceiveSendForm();
+    this.activeSection = 'cashu-receive';
+  }
+
+  showSend() {
+    this.resetReceiveSendForm();
+    this.activeSection = 'cashu-send';
+  }
+
+  private resetAddMintForm() {
+    this.newMintName = '';
+    this.newMintUrl = '';
+    this.mintError = '';
+    this.mintTestResult = '';
+    this.addingMint = false;
+    this.testingMint = false;
+  }
+
+  private resetReceiveSendForm() {
+    this.receiveToken = '';
+    this.receivingToken = false;
+    this.receiveError = '';
+    this.receiveResult = '';
+    this.sendAmount = 0;
+    this.sendingToken = false;
+    this.sendError = '';
+    this.sendResult = '';
+  }
+
+  private resetDepositForm() {
+    this.depositAmount = 0;
+    this.creatingDepositQuote = false;
+    this.depositQuoteId = '';
+    this.depositInvoice = '';
+    this.depositInvoiceQr = '';
+    this.depositError = '';
+    this.depositSuccess = '';
+    this.checkingDepositPayment = false;
+    this.depositQuoteState = 'UNPAID';
+    this.stopDepositPolling();
+  }
+
+  private stopDepositPolling() {
+    if (this.depositPollingInterval) {
+      clearInterval(this.depositPollingInterval);
+      this.depositPollingInterval = null;
+    }
+  }
+
+  async testMint() {
+    if (!this.newMintUrl.trim()) {
+      this.mintError = 'Please enter a mint URL';
+      return;
+    }
+
+    this.testingMint = true;
+    this.mintError = '';
+    this.mintTestResult = '';
+
+    try {
+      const info = await this.cashuService.testMintConnection(
+        this.newMintUrl.trim()
+      );
+      this.mintTestResult = `Connected! ${info.name ? 'Mint: ' + info.name : ''}`;
+    } catch (error) {
+      this.mintError =
+        error instanceof Error ? error.message : 'Connection test failed';
+    } finally {
+      this.testingMint = false;
+    }
+  }
+
+  async addMint() {
+    if (!this.newMintName.trim()) {
+      this.mintError = 'Please enter a mint name';
+      return;
+    }
+    if (!this.newMintUrl.trim()) {
+      this.mintError = 'Please enter a mint URL';
+      return;
+    }
+
+    this.addingMint = true;
+    this.mintError = '';
+
+    try {
+      await this.cashuService.addMint(
+        this.newMintName.trim(),
+        this.newMintUrl.trim()
+      );
+      this.goBack();
+    } catch (error) {
+      this.mintError =
+        error instanceof Error ? error.message : 'Failed to add mint';
+    } finally {
+      this.addingMint = false;
+    }
+  }
+
+  async deleteMint() {
+    if (!this.selectedMintId) return;
+
+    const mint = this.selectedMint;
+    if (!confirm(`Delete mint "${mint?.name}"? Any tokens stored will be lost. This cannot be undone.`)) {
+      return;
+    }
+
+    try {
+      await this.cashuService.deleteMint(this.selectedMintId);
+      this.goBack();
+    } catch (error) {
+      console.error('Failed to delete mint:', error);
+    }
+  }
+
+  async receiveTokens() {
+    if (!this.receiveToken.trim()) {
+      this.receiveError = 'Please paste a Cashu token';
+      return;
+    }
+
+    this.receivingToken = true;
+    this.receiveError = '';
+    this.receiveResult = '';
+
+    try {
+      const result = await this.cashuService.receive(this.receiveToken.trim());
+      this.receiveResult = `Received ${result.amount} sats!`;
+      this.receiveToken = '';
+    } catch (error) {
+      this.receiveError =
+        error instanceof Error ? error.message : 'Failed to receive token';
+    } finally {
+      this.receivingToken = false;
+    }
+  }
+
+  async sendTokens() {
+    if (!this.selectedMintId) return;
+
+    if (this.sendAmount <= 0) {
+      this.sendError = 'Please enter a valid amount';
+      return;
+    }
+
+    const balance = this.selectedMintBalance;
+    if (this.sendAmount > balance) {
+      this.sendError = `Insufficient balance. You have ${balance} sats`;
+      return;
+    }
+
+    this.sendingToken = true;
+    this.sendError = '';
+    this.sendResult = '';
+
+    try {
+      const result = await this.cashuService.send(
+        this.selectedMintId,
+        this.sendAmount
+      );
+      this.sendResult = result.token;
+      this.sendAmount = 0;
+    } catch (error) {
+      this.sendError =
+        error instanceof Error ? error.message : 'Failed to create token';
+    } finally {
+      this.sendingToken = false;
+    }
+  }
+
+  copyToken() {
+    if (this.sendResult) {
+      navigator.clipboard.writeText(this.sendResult);
+    }
+  }
+
+  async checkProofs() {
+    if (!this.selectedMintId) return;
+
+    try {
+      const removedAmount = await this.cashuService.checkProofsSpent(
+        this.selectedMintId
+      );
+      if (removedAmount > 0) {
+        alert(`Removed ${removedAmount} sats of spent proofs.`);
+      } else {
+        alert('All proofs are valid.');
+      }
+    } catch (error) {
+      console.error('Failed to check proofs:', error);
+    }
+  }
+
+  // Cashu deposit (mint) methods
+
+  showDeposit() {
+    this.resetDepositForm();
+    this.activeSection = 'cashu-mint';
+  }
+
+  async createDepositInvoice() {
+    if (!this.selectedMintId) return;
+
+    if (this.depositAmount <= 0) {
+      this.depositError = 'Please enter an amount';
+      return;
+    }
+
+    this.creatingDepositQuote = true;
+    this.depositError = '';
+    this.depositInvoice = '';
+    this.depositInvoiceQr = '';
+
+    try {
+      const quote = await this.cashuService.createMintQuote(
+        this.selectedMintId,
+        this.depositAmount
+      );
+
+      this.depositQuoteId = quote.quoteId;
+      this.depositInvoice = quote.invoice;
+      this.depositQuoteState = quote.state;
+
+      // Generate QR code
+      this.depositInvoiceQr = await QRCode.toDataURL(quote.invoice, {
+        width: 200,
+        margin: 2,
+        color: {
+          dark: '#000000',
+          light: '#ffffff',
+        },
+      });
+
+      // Start polling for payment
+      this.startDepositPolling();
+    } catch (error) {
+      this.depositError =
+        error instanceof Error ? error.message : 'Failed to create invoice';
+    } finally {
+      this.creatingDepositQuote = false;
+    }
+  }
+
+  private startDepositPolling() {
+    // Poll every 3 seconds for payment confirmation
+    this.depositPollingInterval = setInterval(async () => {
+      await this.checkDepositPayment();
+    }, 3000);
+  }
+
+  async checkDepositPayment() {
+    if (!this.selectedMintId || !this.depositQuoteId) return;
+
+    this.checkingDepositPayment = true;
+
+    try {
+      const quote = await this.cashuService.checkMintQuote(
+        this.selectedMintId,
+        this.depositQuoteId
+      );
+
+      this.depositQuoteState = quote.state;
+
+      if (quote.state === 'PAID') {
+        // Invoice is paid, claim the tokens
+        this.stopDepositPolling();
+        await this.claimDepositTokens();
+      } else if (quote.state === 'ISSUED') {
+        // Already claimed
+        this.stopDepositPolling();
+        this.depositSuccess = 'Tokens already claimed!';
+      }
+    } catch (error) {
+      // Don't show error for polling failures, just log
+      console.error('Failed to check payment:', error);
+    } finally {
+      this.checkingDepositPayment = false;
+    }
+  }
+
+  async claimDepositTokens() {
+    if (!this.selectedMintId || !this.depositQuoteId) return;
+
+    try {
+      const result = await this.cashuService.mintTokens(
+        this.selectedMintId,
+        this.depositAmount,
+        this.depositQuoteId
+      );
+
+      this.depositSuccess = `Received ${result.amount} sats!`;
+      this.depositQuoteState = 'ISSUED';
+    } catch (error) {
+      this.depositError =
+        error instanceof Error ? error.message : 'Failed to claim tokens';
+    }
+  }
+
+  async copyDepositInvoice() {
+    if (this.depositInvoice) {
+      await navigator.clipboard.writeText(this.depositInvoice);
+    }
+  }
+
+  formatCashuBalance(sats: number | undefined): string {
+    return this.cashuService.formatBalance(sats);
+  }
+
+  async refreshBalance(connectionId: string) {
+    try {
+      await this.nwcService.getBalance(connectionId);
+    } catch (error) {
+      console.error('Failed to refresh balance:', error);
+    }
+  }
+
+  async refreshAllBalances() {
+    this.loadingBalances = true;
+    this.balanceError = '';
+
+    try {
+      await this.nwcService.getAllBalances();
+    } catch {
+      this.balanceError = 'Failed to refresh some balances';
+    } finally {
+      this.loadingBalances = false;
+    }
+  }
+
+  formatBalance(millisats: number | undefined): string {
+    if (millisats === undefined) return '—';
+    // Convert millisats to sats with 3 decimal places
+    const sats = millisats / 1000;
+    return sats.toLocaleString('en-US', {
+      minimumFractionDigits: 0,
+      maximumFractionDigits: 3,
+    });
+  }
+
+  // Lightning transaction methods
+
+  async loadTransactions(connectionId: string) {
+    this.loadingTransactions = true;
+    this.transactionsError = '';
+    this.transactionsNotSupported = false;
+
+    try {
+      this.transactions = await this.nwcService.listTransactions(connectionId, {
+        limit: 20,
+      });
+    } catch (error) {
+      const errorMsg = error instanceof Error ? error.message : 'Unknown error';
+      if (errorMsg.includes('NOT_IMPLEMENTED') || errorMsg.includes('not supported')) {
+        this.transactionsNotSupported = true;
+      } else {
+        this.transactionsError = errorMsg;
+      }
+      this.transactions = [];
+    } finally {
+      this.loadingTransactions = false;
+    }
+  }
+
+  async refreshWallet() {
+    if (!this.selectedConnectionId) return;
+
+    // Refresh balance and transactions in parallel
+    await Promise.all([
+      this.refreshBalance(this.selectedConnectionId),
+      this.loadTransactions(this.selectedConnectionId),
+    ]);
+  }
+
+  showLnReceive() {
+    this.resetLightningForms();
+    this.activeSection = 'lightning-receive';
+  }
+
+  showLnPay() {
+    this.resetLightningForms();
+    this.showPayModal = true;
+  }
+
+  closePayModal() {
+    this.showPayModal = false;
+    this.resetLightningForms();
+  }
+
+  async createReceiveInvoice() {
+    if (!this.selectedConnectionId) return;
+
+    if (this.lnReceiveAmount <= 0) {
+      this.lnReceiveError = 'Please enter an amount';
+      return;
+    }
+
+    this.generatingInvoice = true;
+    this.lnReceiveError = '';
+    this.generatedInvoice = '';
+    this.generatedInvoiceQr = '';
+
+    try {
+      const result = await this.nwcService.makeInvoice(
+        this.selectedConnectionId,
+        this.lnReceiveAmount * 1000, // Convert sats to millisats
+        this.lnReceiveDescription || undefined
+      );
+      this.generatedInvoice = result.invoice;
+
+      // Generate QR code
+      this.generatedInvoiceQr = await QRCode.toDataURL(result.invoice, {
+        width: 200,
+        margin: 2,
+        color: {
+          dark: '#000000',
+          light: '#ffffff',
+        },
+      });
+    } catch (error) {
+      this.lnReceiveError =
+        error instanceof Error ? error.message : 'Failed to create invoice';
+    } finally {
+      this.generatingInvoice = false;
+    }
+  }
+
+  async copyInvoice() {
+    if (this.generatedInvoice) {
+      await navigator.clipboard.writeText(this.generatedInvoice);
+      this.invoiceCopied = true;
+      setTimeout(() => (this.invoiceCopied = false), 2000);
+    }
+  }
+
+  async copyLightningAddress() {
+    const lud16 = this.selectedConnection?.lud16;
+    if (lud16) {
+      await navigator.clipboard.writeText(lud16);
+      this.addressCopied = true;
+      setTimeout(() => (this.addressCopied = false), 2000);
+    }
+  }
+
+  async payInvoiceOrAddress() {
+    if (!this.selectedConnectionId || !this.payInput.trim()) {
+      this.paymentError = 'Please enter a lightning address or invoice';
+      return;
+    }
+
+    this.paying = true;
+    this.paymentError = '';
+    this.paymentSuccess = false;
+
+    try {
+      let invoice = this.payInput.trim();
+
+      // Check if it's a lightning address
+      if (this.nwcService.isLightningAddress(invoice)) {
+        if (this.payAmount <= 0) {
+          this.paymentError = 'Please enter an amount for lightning address payments';
+          this.paying = false;
+          return;
+        }
+        // Resolve lightning address to invoice
+        invoice = await this.nwcService.resolveLightningAddress(
+          invoice,
+          this.payAmount * 1000 // Convert sats to millisats
+        );
+      }
+
+      // Pay the invoice
+      await this.nwcService.payInvoice(
+        this.selectedConnectionId,
+        invoice,
+        this.payAmount > 0 ? this.payAmount * 1000 : undefined
+      );
+
+      this.paymentSuccess = true;
+
+      // Refresh balance and transactions after payment
+      await this.refreshWallet();
+
+      // Close modal after a delay
+      setTimeout(() => {
+        this.closePayModal();
+      }, 2000);
+    } catch (error) {
+      this.paymentError =
+        error instanceof Error ? error.message : 'Payment failed';
+    } finally {
+      this.paying = false;
+    }
+  }
+
+  formatTransactionTime(timestamp: number): string {
+    const date = new Date(timestamp * 1000);
+    const now = new Date();
+    const isToday = date.toDateString() === now.toDateString();
+
+    if (isToday) {
+      return date.toLocaleTimeString('en-US', {
+        hour: '2-digit',
+        minute: '2-digit',
+      });
+    }
+
+    return date.toLocaleDateString('en-US', {
+      month: 'short',
+      day: 'numeric',
+    });
+  }
+
+  formatProofTime(isoTimestamp: string | undefined): string {
+    if (!isoTimestamp) return '—';
+
+    const date = new Date(isoTimestamp);
+    const now = new Date();
+    const isToday = date.toDateString() === now.toDateString();
+
+    if (isToday) {
+      return date.toLocaleTimeString('en-US', {
+        hour: '2-digit',
+        minute: '2-digit',
+      });
+    }
+
+    return date.toLocaleDateString('en-US', {
+      month: 'short',
+      day: 'numeric',
+      hour: '2-digit',
+      minute: '2-digit',
+    });
+  }
 
   async onClickLock() {
     this.#logger.logVaultLock();
     await this.#storage.lockVault();
     this.#router.navigateByUrl('/vault-login');
   }
+
+  // Cashu onboarding methods
+  dismissCashuInfo() {
+    this.showCashuInfo = false;
+  }
+
+  navigateToSettings() {
+    this.#router.navigateByUrl('/home/settings');
+  }
 }

projects/chrome/src/app/components/welcome/welcome.component.html

@@ -37,6 +37,26 @@
   <span> Sync OFF</span>
 </button>
 
+<div class="storage-info">
+  <details>
+    <summary>Important for Cashu wallet users</summary>
+    <p>
+      Browser sync storage is limited to ~100KB shared across all data
+      (identities, permissions, relays, and Cashu tokens).
+    </p>
+    <p>
+      If you plan to use the Cashu ecash wallet with significant balances,
+      choose <strong>"Sync OFF"</strong> which provides ~5MB of local storage
+      (enough for ~18,000+ tokens vs ~300-400 with sync).
+    </p>
+    <p>
+      <strong>Note:</strong> Cashu tokens are bearer assets. If you lose your
+      vault backup, you lose your tokens permanently. Make sure to configure
+      regular backups.
+    </p>
+  </details>
+</div>
+
 <div class="sam-flex-grow"></div>
 
 <span class="sam-text-muted sam-text-md sam-mb">

projects/chrome/src/app/components/welcome/welcome.component.scss

@@ -6,3 +6,41 @@
   padding-left: var(--size);
   padding-right: var(--size);
 }
+
+.storage-info {
+  margin-top: 1rem;
+  width: 100%;
+
+  details {
+    background: rgba(255, 193, 7, 0.1);
+    border: 1px solid var(--warning, #ffc107);
+    border-radius: 6px;
+    padding: 0.5rem;
+
+    summary {
+      cursor: pointer;
+      font-weight: 500;
+      font-size: 0.9rem;
+      color: var(--warning, #ffc107);
+
+      &:hover {
+        text-decoration: underline;
+      }
+    }
+
+    p {
+      margin: 0.75rem 0 0 0;
+      font-size: 0.85rem;
+      line-height: 1.4;
+      color: var(--text-muted, #6c757d);
+
+      &:last-child {
+        margin-bottom: 0.5rem;
+      }
+
+      strong {
+        color: var(--text, #212529);
+      }
+    }
+  }
+}

projects/chrome/src/options.ts

@@ -5,6 +5,7 @@ import {
 } from '@common';
 import './app/common/extensions/array';
 import browser from 'webextension-polyfill';
+import { v4 as uuidv4 } from 'uuid';
 
 //
 // Functions
@@ -105,8 +106,12 @@ document.addEventListener('DOMContentLoaded', async () => {
         }
 
         newSnapshots.push({
+          id: uuidv4(),
           fileName: file.name,
+          createdAt: new Date().toISOString(),
           data: vault,
+          identityCount: vault.identities?.length ?? 0,
+          reason: 'manual',
         });
       }
 

projects/common/src/lib/services/cashu/cashu.service.ts

@@ -0,0 +1,450 @@
+import { Injectable } from '@angular/core';
+import {
+  Mint,
+  Wallet,
+  getDecodedToken,
+  getEncodedTokenV4,
+  Token,
+  Proof,
+  CheckStateEnum,
+} from '@cashu/cashu-ts';
+import { StorageService, CashuMint_DECRYPTED, CashuProof } from '@common';
+import {
+  CashuReceiveResult,
+  CashuSendResult,
+  DecodedCashuToken,
+  CashuMintInfo,
+  CashuMintQuote,
+  CashuMintResult,
+  MintQuoteState,
+} from './types';
+
+interface CachedWallet {
+  wallet: Wallet;
+  mint: Mint;
+  mintId: string;
+}
+
+/**
+ * Angular service for managing Cashu ecash wallets
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class CashuService {
+  private wallets = new Map<string, CachedWallet>();
+
+  constructor(private storageService: StorageService) {}
+
+  /**
+   * Get all Cashu mints from storage
+   */
+  getMints(): CashuMint_DECRYPTED[] {
+    const sessionData =
+      this.storageService.getBrowserSessionHandler().browserSessionData;
+    return sessionData?.cashuMints ?? [];
+  }
+
+  /**
+   * Get a single Cashu mint by ID
+   */
+  getMint(mintId: string): CashuMint_DECRYPTED | undefined {
+    return this.getMints().find((m) => m.id === mintId);
+  }
+
+  /**
+   * Get a mint by URL
+   */
+  getMintByUrl(mintUrl: string): CashuMint_DECRYPTED | undefined {
+    const normalizedUrl = mintUrl.replace(/\/$/, '');
+    return this.getMints().find((m) => m.mintUrl === normalizedUrl);
+  }
+
+  /**
+   * Add a new Cashu mint connection
+   */
+  async addMint(name: string, mintUrl: string): Promise<CashuMint_DECRYPTED> {
+    // Test the mint connection first
+    await this.testMintConnection(mintUrl);
+
+    // Add to storage
+    return await this.storageService.addCashuMint({
+      name,
+      mintUrl,
+      unit: 'sat',
+    });
+  }
+
+  /**
+   * Delete a Cashu mint connection
+   */
+  async deleteMint(mintId: string): Promise<void> {
+    // Remove from cache
+    this.wallets.delete(mintId);
+    await this.storageService.deleteCashuMint(mintId);
+  }
+
+  /**
+   * Get or create a wallet for a mint
+   */
+  private async getWallet(mintId: string): Promise<CachedWallet> {
+    // Check cache
+    const cached = this.wallets.get(mintId);
+    if (cached) {
+      return cached;
+    }
+
+    // Get mint data from storage
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      throw new Error('Mint not found');
+    }
+
+    // Create mint and wallet instances
+    const mint = new Mint(mintData.mintUrl);
+    const wallet = new Wallet(mint, { unit: mintData.unit || 'sat' });
+
+    // Load mint keys
+    await wallet.loadMint();
+
+    // Cache it
+    const cachedWallet: CachedWallet = {
+      wallet,
+      mint,
+      mintId,
+    };
+    this.wallets.set(mintId, cachedWallet);
+
+    return cachedWallet;
+  }
+
+  /**
+   * Test a mint connection by fetching its info
+   */
+  async testMintConnection(mintUrl: string): Promise<CashuMintInfo> {
+    const normalizedUrl = mintUrl.replace(/\/$/, '');
+    const mint = new Mint(normalizedUrl);
+    const info = await mint.getInfo();
+    return {
+      name: info.name,
+      description: info.description,
+      version: info.version,
+      contact: info.contact?.map((c) => ({ method: c.method, info: c.info })),
+      nuts: info.nuts,
+    };
+  }
+
+  /**
+   * Decode a Cashu token without claiming it
+   */
+  decodeToken(token: string): DecodedCashuToken | null {
+    try {
+      const decoded = getDecodedToken(token);
+      const proofs = decoded.proofs;
+      const amount = proofs.reduce((sum, p) => sum + p.amount, 0);
+
+      return {
+        mint: decoded.mint,
+        unit: decoded.unit || 'sat',
+        amount,
+        proofs,
+      };
+    } catch {
+      return null;
+    }
+  }
+
+  /**
+   * Receive a Cashu token
+   * This validates and claims the proofs, then stores them
+   */
+  async receive(token: string): Promise<CashuReceiveResult> {
+    // Decode the token
+    const decoded = this.decodeToken(token);
+    if (!decoded) {
+      throw new Error('Invalid token format');
+    }
+
+    // Check if we have this mint
+    let mintData = this.getMintByUrl(decoded.mint);
+
+    // If we don't have this mint, add it automatically
+    if (!mintData) {
+      // Use the mint URL as the name initially
+      const urlObj = new URL(decoded.mint);
+      mintData = await this.storageService.addCashuMint({
+        name: urlObj.hostname,
+        mintUrl: decoded.mint,
+        unit: decoded.unit || 'sat',
+      });
+    }
+
+    // Get the wallet for this mint
+    const { wallet } = await this.getWallet(mintData.id);
+
+    // Receive the token (this swaps proofs with the mint)
+    const receivedProofs = await wallet.receive(token);
+
+    // Convert to our proof format with timestamp
+    const now = new Date().toISOString();
+    const newProofs: CashuProof[] = receivedProofs.map((p: Proof) => ({
+      id: p.id,
+      amount: p.amount,
+      secret: p.secret,
+      C: p.C,
+      receivedAt: now,
+    }));
+
+    // Merge with existing proofs
+    const existingProofs = mintData!.proofs || [];
+    const allProofs = [...existingProofs, ...newProofs];
+
+    // Update storage
+    await this.storageService.updateCashuMintProofs(mintData!.id, allProofs);
+
+    // Calculate received amount
+    const amount = newProofs.reduce((sum, p) => sum + p.amount, 0);
+
+    return {
+      amount,
+      mintUrl: decoded.mint,
+      mintId: mintData!.id,
+    };
+  }
+
+  /**
+   * Send Cashu tokens
+   * Creates an encoded token from existing proofs
+   */
+  async send(mintId: string, amount: number): Promise<CashuSendResult> {
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      throw new Error('Mint not found');
+    }
+
+    // Check we have enough balance
+    const balance = this.getBalance(mintId);
+    if (balance < amount) {
+      throw new Error(`Insufficient balance. Have ${balance} sats, need ${amount} sats`);
+    }
+
+    // Get the wallet
+    const { wallet } = await this.getWallet(mintId);
+
+    // Convert our proofs to the format cashu-ts expects
+    const proofs: Proof[] = mintData.proofs.map((p) => ({
+      id: p.id,
+      amount: p.amount,
+      secret: p.secret,
+      C: p.C,
+    }));
+
+    // Send - this returns send proofs and keep proofs (change)
+    const { send, keep } = await wallet.send(amount, proofs);
+
+    // Create the token to share
+    const token: Token = {
+      mint: mintData.mintUrl,
+      proofs: send,
+      unit: mintData.unit || 'sat',
+    };
+    const encodedToken = getEncodedTokenV4(token);
+
+    // Update our stored proofs to only keep the change (new proofs from mint)
+    const now = new Date().toISOString();
+    const keepProofs: CashuProof[] = keep.map((p: Proof) => ({
+      id: p.id,
+      amount: p.amount,
+      secret: p.secret,
+      C: p.C,
+      receivedAt: now,
+    }));
+
+    await this.storageService.updateCashuMintProofs(mintId, keepProofs);
+
+    return {
+      token: encodedToken,
+      amount,
+    };
+  }
+
+  /**
+   * Check if any proofs have been spent
+   * Removes spent proofs from storage
+   */
+  async checkProofsSpent(mintId: string): Promise<number> {
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      throw new Error('Mint not found');
+    }
+
+    if (mintData.proofs.length === 0) {
+      return 0;
+    }
+
+    const { wallet } = await this.getWallet(mintId);
+
+    // Only the secret field is needed for checking proof states
+    const proofsToCheck = mintData.proofs.map((p) => ({ secret: p.secret }));
+
+    // Check which proofs are spent using v3 API
+    const proofStates = await wallet.checkProofsStates(proofsToCheck);
+
+    // Filter out spent proofs
+    const unspentProofs: CashuProof[] = [];
+    let removedAmount = 0;
+
+    for (let i = 0; i < mintData.proofs.length; i++) {
+      if (proofStates[i].state !== CheckStateEnum.SPENT) {
+        unspentProofs.push(mintData.proofs[i]);
+      } else {
+        removedAmount += mintData.proofs[i].amount;
+      }
+    }
+
+    // Update storage if any were spent
+    if (removedAmount > 0) {
+      await this.storageService.updateCashuMintProofs(mintId, unspentProofs);
+    }
+
+    return removedAmount;
+  }
+
+  /**
+   * Create a mint quote (Lightning invoice) for depositing sats
+   * Returns a Lightning invoice that when paid will allow minting tokens
+   */
+  async createMintQuote(mintId: string, amount: number): Promise<CashuMintQuote> {
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      throw new Error('Mint not found');
+    }
+
+    if (amount <= 0) {
+      throw new Error('Amount must be greater than 0');
+    }
+
+    const { wallet } = await this.getWallet(mintId);
+
+    // Create a mint quote - this returns a Lightning invoice
+    const quote = await wallet.createMintQuote(amount);
+
+    return {
+      quoteId: quote.quote,
+      invoice: quote.request,
+      amount: amount,
+      state: quote.state as MintQuoteState,
+      expiry: quote.expiry,
+    };
+  }
+
+  /**
+   * Check the status of a mint quote
+   * Returns the current state (UNPAID, PAID, ISSUED)
+   */
+  async checkMintQuote(mintId: string, quoteId: string): Promise<CashuMintQuote> {
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      throw new Error('Mint not found');
+    }
+
+    const { wallet } = await this.getWallet(mintId);
+
+    // Check the quote status
+    const quote = await wallet.checkMintQuote(quoteId);
+
+    return {
+      quoteId: quote.quote,
+      invoice: quote.request,
+      amount: 0, // Amount not returned in check response
+      state: quote.state as MintQuoteState,
+      expiry: quote.expiry,
+    };
+  }
+
+  /**
+   * Mint tokens after paying the Lightning invoice
+   * This claims the tokens and stores them
+   */
+  async mintTokens(mintId: string, amount: number, quoteId: string): Promise<CashuMintResult> {
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      throw new Error('Mint not found');
+    }
+
+    const { wallet } = await this.getWallet(mintId);
+
+    // Mint the proofs
+    const mintedProofs = await wallet.mintProofs(amount, quoteId);
+
+    // Convert to our proof format with timestamp
+    const now = new Date().toISOString();
+    const newProofs: CashuProof[] = mintedProofs.map((p: Proof) => ({
+      id: p.id,
+      amount: p.amount,
+      secret: p.secret,
+      C: p.C,
+      receivedAt: now,
+    }));
+
+    // Merge with existing proofs
+    const existingProofs = mintData.proofs || [];
+    const allProofs = [...existingProofs, ...newProofs];
+
+    // Update storage
+    await this.storageService.updateCashuMintProofs(mintId, allProofs);
+
+    // Calculate minted amount
+    const mintedAmount = newProofs.reduce((sum, p) => sum + p.amount, 0);
+
+    return {
+      amount: mintedAmount,
+      mintId: mintId,
+    };
+  }
+
+  /**
+   * Get balance for a specific mint (in satoshis)
+   */
+  getBalance(mintId: string): number {
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      return 0;
+    }
+    return mintData.proofs.reduce((sum, p) => sum + p.amount, 0);
+  }
+
+  /**
+   * Get proofs for a specific mint
+   */
+  getProofs(mintId: string): CashuProof[] {
+    const mintData = this.getMint(mintId);
+    if (!mintData) {
+      return [];
+    }
+    return mintData.proofs;
+  }
+
+  /**
+   * Get total balance across all mints (in satoshis)
+   */
+  getTotalBalance(): number {
+    const mints = this.getMints();
+    return mints.reduce((sum, m) => sum + this.getBalance(m.id), 0);
+  }
+
+  /**
+   * Get cached total balance (same as getTotalBalance for Cashu since it's all local)
+   */
+  getCachedTotalBalance(): number {
+    return this.getTotalBalance();
+  }
+
+  /**
+   * Format a balance for display (Cashu uses satoshis, not millisatoshis)
+   */
+  formatBalance(sats: number | undefined): string {
+    if (sats === undefined) return '—';
+    return sats.toLocaleString('en-US');
+  }
+}

projects/common/src/lib/services/cashu/types.ts

@@ -0,0 +1,71 @@
+import type { Proof } from '@cashu/cashu-ts';
+
+/**
+ * Result from receiving a Cashu token
+ */
+export interface CashuReceiveResult {
+  amount: number;      // Amount received in satoshis
+  mintUrl: string;     // Mint the tokens were from
+  mintId: string;      // ID of the mint in our storage
+}
+
+/**
+ * Result from sending Cashu tokens
+ */
+export interface CashuSendResult {
+  token: string;       // Encoded token to share (cashuB...)
+  amount: number;      // Amount in satoshis
+}
+
+/**
+ * Information about a decoded Cashu token
+ */
+export interface DecodedCashuToken {
+  mint: string;        // Mint URL
+  unit: string;        // Unit (usually 'sat')
+  amount: number;      // Total amount in the token
+  proofs: Proof[];     // The individual proofs
+}
+
+/**
+ * Mint contact info
+ */
+export interface MintContact {
+  method: string;
+  info: string;
+}
+
+/**
+ * Mint information returned when testing a connection
+ */
+export interface CashuMintInfo {
+  name?: string;
+  description?: string;
+  version?: string;
+  contact?: MintContact[];
+  nuts: Record<string, unknown>;
+}
+
+/**
+ * State of a mint quote
+ */
+export type MintQuoteState = 'UNPAID' | 'PAID' | 'ISSUED';
+
+/**
+ * Result from creating a mint quote (Lightning invoice to deposit)
+ */
+export interface CashuMintQuote {
+  quoteId: string;        // Quote ID for checking status and claiming
+  invoice: string;        // Lightning invoice to pay
+  amount: number;         // Amount in satoshis
+  state: MintQuoteState;  // Current state of the quote
+  expiry?: number;        // Expiry timestamp (unix seconds)
+}
+
+/**
+ * Result from minting tokens after paying the invoice
+ */
+export interface CashuMintResult {
+  amount: number;         // Amount minted in satoshis
+  mintId: string;         // ID of the mint
+}

projects/common/src/lib/services/nwc/nwc-client.ts

@@ -0,0 +1,541 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { NostrHelper } from '@common';
+import { finalizeEvent, nip04, nip44, getPublicKey } from 'nostr-tools';
+import {
+  NwcRequest,
+  NwcResponse,
+  NwcGetBalanceResult,
+  NwcGetInfoResult,
+  NwcPayInvoiceParams,
+  NwcPayInvoiceResult,
+  NwcMakeInvoiceParams,
+  NwcMakeInvoiceResult,
+  NwcListTransactionsParams,
+  NwcListTransactionsResult,
+  NWC_METHODS,
+} from './types';
+
+export interface NwcConnectionData {
+  walletPubkey: string;
+  relayUrl: string;
+  secret: string;
+}
+
+export type NwcLogLevel = 'info' | 'warn' | 'error';
+export type NwcLogCallback = (level: NwcLogLevel, message: string) => void;
+
+interface PendingRequest {
+  resolve: (value: NwcResponse) => void;
+  reject: (reason: Error) => void;
+  timeout: ReturnType<typeof setTimeout>;
+  request: NwcRequest;
+  isRetry: boolean;
+}
+
+type EncryptionMode = 'nip44' | 'nip04';
+
+/**
+ * NWC Client for communicating with NIP-47 wallet services
+ */
+export class NwcClient {
+  private ws: WebSocket | null = null;
+  private connected = false;
+  private pendingRequests = new Map<string, PendingRequest>();
+  private subscriptionId: string | null = null;
+  private conversationKey: Uint8Array;
+  private clientPubkey: string;
+  private encryptionMode: EncryptionMode = 'nip44';
+  private logCallback: NwcLogCallback | null = null;
+
+  constructor(
+    private connectionData: NwcConnectionData,
+    logCallback?: NwcLogCallback
+  ) {
+    this.logCallback = logCallback ?? null;
+    // Derive the conversation key for NIP-44 encryption
+    this.conversationKey = nip44.v2.utils.getConversationKey(
+      NostrHelper.hex2bytes(connectionData.secret),
+      connectionData.walletPubkey
+    );
+    // Derive our public key from the secret
+    this.clientPubkey = getPublicKey(
+      NostrHelper.hex2bytes(connectionData.secret)
+    );
+  }
+
+  private log(level: NwcLogLevel, message: string): void {
+    if (this.logCallback) {
+      this.logCallback(level, message);
+    }
+  }
+
+  /**
+   * Connect to the NWC relay
+   */
+  async connect(): Promise<void> {
+    if (this.connected) {
+      return;
+    }
+
+    return new Promise((resolve, reject) => {
+      try {
+        this.log('info', `Connecting to ${this.connectionData.relayUrl}...`);
+        this.ws = new WebSocket(this.connectionData.relayUrl);
+
+        const timeout = setTimeout(() => {
+          this.log('error', 'Connection timeout');
+          reject(new Error('Connection timeout'));
+          this.disconnect();
+        }, 10000);
+
+        this.ws.onopen = () => {
+          clearTimeout(timeout);
+          this.connected = true;
+          this.log('info', 'Connected to relay');
+          this.subscribe();
+          resolve();
+        };
+
+        this.ws.onerror = () => {
+          clearTimeout(timeout);
+          this.log('error', 'WebSocket error');
+          reject(new Error('WebSocket error'));
+        };
+
+        this.ws.onclose = () => {
+          this.connected = false;
+          this.subscriptionId = null;
+          // Reject all pending requests
+          for (const [, pending] of this.pendingRequests) {
+            clearTimeout(pending.timeout);
+            pending.reject(new Error('Connection closed'));
+          }
+          this.pendingRequests.clear();
+        };
+
+        this.ws.onmessage = (event) => {
+          this.handleMessage(event.data);
+        };
+      } catch (error) {
+        reject(error);
+      }
+    });
+  }
+
+  /**
+   * Disconnect from the relay
+   */
+  disconnect(): void {
+    if (this.ws) {
+      if (this.subscriptionId) {
+        this.ws.send(JSON.stringify(['CLOSE', this.subscriptionId]));
+      }
+      this.ws.close();
+      this.ws = null;
+    }
+    this.connected = false;
+    this.subscriptionId = null;
+  }
+
+  /**
+   * Check if connected
+   */
+  isConnected(): boolean {
+    return this.connected && this.ws?.readyState === WebSocket.OPEN;
+  }
+
+  /**
+   * Get wallet info
+   */
+  async getInfo(): Promise<NwcGetInfoResult> {
+    const response = await this.sendRequest({
+      method: NWC_METHODS.GET_INFO,
+    });
+
+    if (response.error) {
+      throw new Error(response.error.message);
+    }
+
+    return response.result as unknown as NwcGetInfoResult;
+  }
+
+  /**
+   * Get wallet balance
+   */
+  async getBalance(): Promise<NwcGetBalanceResult> {
+    const response = await this.sendRequest({
+      method: NWC_METHODS.GET_BALANCE,
+    });
+
+    if (response.error) {
+      throw new Error(response.error.message);
+    }
+
+    return response.result as unknown as NwcGetBalanceResult;
+  }
+
+  /**
+   * Pay a Lightning invoice
+   */
+  async payInvoice(params: NwcPayInvoiceParams): Promise<NwcPayInvoiceResult> {
+    const response = await this.sendRequest({
+      method: NWC_METHODS.PAY_INVOICE,
+      params: params as unknown as Record<string, unknown>,
+    });
+
+    if (response.error) {
+      throw new Error(response.error.message);
+    }
+
+    return response.result as unknown as NwcPayInvoiceResult;
+  }
+
+  /**
+   * Create a Lightning invoice
+   */
+  async makeInvoice(
+    params: NwcMakeInvoiceParams
+  ): Promise<NwcMakeInvoiceResult> {
+    const response = await this.sendRequest({
+      method: NWC_METHODS.MAKE_INVOICE,
+      params: params as unknown as Record<string, unknown>,
+    });
+
+    if (response.error) {
+      throw new Error(response.error.message);
+    }
+
+    return response.result as unknown as NwcMakeInvoiceResult;
+  }
+
+  /**
+   * List transaction history
+   */
+  async listTransactions(
+    params?: NwcListTransactionsParams
+  ): Promise<NwcListTransactionsResult> {
+    const response = await this.sendRequest({
+      method: NWC_METHODS.LIST_TRANSACTIONS,
+      params: params as unknown as Record<string, unknown>,
+    });
+
+    if (response.error) {
+      throw new Error(response.error.message);
+    }
+
+    return response.result as unknown as NwcListTransactionsResult;
+  }
+
+  /**
+   * Encrypt content using current encryption mode
+   */
+  private async encryptContent(plaintext: string): Promise<string> {
+    if (this.encryptionMode === 'nip04') {
+      return nip04.encrypt(
+        this.connectionData.secret,
+        this.connectionData.walletPubkey,
+        plaintext
+      );
+    } else {
+      return nip44.v2.encrypt(plaintext, this.conversationKey);
+    }
+  }
+
+  /**
+   * Send a request to the wallet
+   */
+  private async sendRequest(
+    request: NwcRequest,
+    timeoutMs = 30000,
+    isRetry = false
+  ): Promise<NwcResponse> {
+    if (!this.isConnected()) {
+      await this.connect();
+    }
+
+    // Encrypt the request content
+    const plaintext = JSON.stringify(request);
+    this.log(
+      'info',
+      `Sending ${request.method} request (using ${this.encryptionMode.toUpperCase()})`
+    );
+    const ciphertext = await this.encryptContent(plaintext);
+
+    // Create the NIP-47 request event (kind 23194)
+    const eventTemplate = {
+      kind: 23194,
+      created_at: Math.floor(Date.now() / 1000),
+      tags: [['p', this.connectionData.walletPubkey]],
+      content: ciphertext,
+    };
+
+    // Sign with the client secret
+    const signedEvent = finalizeEvent(
+      eventTemplate,
+      NostrHelper.hex2bytes(this.connectionData.secret)
+    );
+
+    return new Promise((resolve, reject) => {
+      const timeout = setTimeout(() => {
+        this.pendingRequests.delete(signedEvent.id);
+        this.log('error', `Request timeout for ${request.method}`);
+        reject(new Error('Request timeout'));
+      }, timeoutMs);
+
+      this.pendingRequests.set(signedEvent.id, {
+        resolve,
+        reject,
+        timeout,
+        request,
+        isRetry,
+      });
+
+      // Send the event
+      this.ws!.send(JSON.stringify(['EVENT', signedEvent]));
+    });
+  }
+
+  /**
+   * Retry a request with NIP-04 encryption
+   */
+  private async retryWithNip04(request: NwcRequest): Promise<NwcResponse> {
+    this.log('warn', 'Retrying with NIP-04 encryption...');
+    this.encryptionMode = 'nip04';
+    return this.sendRequest(request, 30000, true);
+  }
+
+  /**
+   * Subscribe to response events from the wallet
+   */
+  private subscribe(): void {
+    if (!this.ws || !this.connected) {
+      return;
+    }
+
+    // Generate a subscription ID
+    this.subscriptionId = Math.random().toString(36).substring(2, 15);
+
+    // Subscribe to kind 23195 (response) events addressed to us
+    const filter = {
+      kinds: [23195],
+      '#p': [this.clientPubkey],
+      since: Math.floor(Date.now() / 1000) - 10, // Last 10 seconds
+    };
+
+    this.ws.send(JSON.stringify(['REQ', this.subscriptionId, filter]));
+  }
+
+  /**
+   * Handle incoming WebSocket messages
+   */
+  private handleMessage(data: string): void {
+    try {
+      const message = JSON.parse(data);
+
+      if (!Array.isArray(message)) {
+        return;
+      }
+
+      const [type, ...rest] = message;
+
+      switch (type) {
+        case 'EVENT':
+          this.handleEvent(rest[1]);
+          break;
+        case 'OK':
+          // Event was received by relay
+          break;
+        case 'EOSE':
+          // End of stored events
+          break;
+        case 'NOTICE':
+          this.log('warn', `Relay notice: ${rest[0]}`);
+          break;
+      }
+    } catch (error) {
+      this.log('error', `Error parsing message: ${(error as Error).message}`);
+    }
+  }
+
+  /**
+   * Check if an error indicates a decryption/encryption problem
+   */
+  private isEncryptionError(errorMsg: string): boolean {
+    const lowerMsg = errorMsg.toLowerCase();
+    return (
+      lowerMsg.includes('decrypt') ||
+      lowerMsg.includes('initialization vector') ||
+      lowerMsg.includes('iv') ||
+      lowerMsg.includes('encrypt') ||
+      lowerMsg.includes('cipher') ||
+      lowerMsg.includes('parse')
+    );
+  }
+
+  /**
+   * Handle an incoming event (response from wallet)
+   */
+  private async handleEvent(event: any): Promise<void> {
+    if (!event || event.kind !== 23195) {
+      return;
+    }
+
+    // Check if this event is from the wallet
+    if (event.pubkey !== this.connectionData.walletPubkey) {
+      return;
+    }
+
+    // Find the request ID from the 'e' tag
+    const eTag = event.tags?.find((t: string[]) => t[0] === 'e');
+    if (!eTag) {
+      return;
+    }
+
+    const requestId = eTag[1];
+    const pending = this.pendingRequests.get(requestId);
+
+    if (!pending) {
+      // Response for unknown request (might be old or from another session)
+      return;
+    }
+
+    // Clear the timeout and remove from pending
+    clearTimeout(pending.timeout);
+    this.pendingRequests.delete(requestId);
+
+    try {
+      // Try to decrypt the response
+      let decrypted: string;
+
+      // First, check if content looks like plain JSON (unencrypted error)
+      if (
+        event.content.startsWith('{') ||
+        event.content.startsWith('"')
+      ) {
+        // Might be unencrypted error response
+        try {
+          const parsed = JSON.parse(event.content);
+          // If it has an error field, this is an unencrypted error response
+          if (parsed.error) {
+            this.log(
+              'error',
+              `Wallet error: ${parsed.error.message || JSON.stringify(parsed.error)}`
+            );
+
+            // Check if it's an encryption error and we haven't retried yet
+            const errorMsg =
+              parsed.error.message || JSON.stringify(parsed.error);
+            if (
+              !pending.isRetry &&
+              this.encryptionMode === 'nip44' &&
+              this.isEncryptionError(errorMsg)
+            ) {
+              this.log(
+                'warn',
+                'Wallet returned encryption error, switching to NIP-04'
+              );
+              try {
+                const retryResponse = await this.retryWithNip04(pending.request);
+                pending.resolve(retryResponse);
+                return;
+              } catch (retryError) {
+                pending.reject(retryError as Error);
+                return;
+              }
+            }
+
+            pending.resolve(parsed as NwcResponse);
+            return;
+          }
+        } catch {
+          // Not valid JSON, continue with decryption
+        }
+      }
+
+      // Detect encryption format and decrypt
+      // NIP-04 format contains "?iv=" in the ciphertext
+      if (event.content.includes('?iv=')) {
+        this.log('info', 'Decrypting response (NIP-04 format)');
+        decrypted = await nip04.decrypt(
+          this.connectionData.secret,
+          this.connectionData.walletPubkey,
+          event.content
+        );
+      } else {
+        this.log('info', 'Decrypting response (NIP-44 format)');
+        try {
+          decrypted = nip44.v2.decrypt(event.content, this.conversationKey);
+        } catch (nip44Error) {
+          // NIP-44 decryption failed, maybe it's NIP-04 without standard format?
+          // Try NIP-04 as fallback
+          this.log(
+            'warn',
+            `NIP-44 decryption failed: ${(nip44Error as Error).message}, trying NIP-04...`
+          );
+          try {
+            decrypted = await nip04.decrypt(
+              this.connectionData.secret,
+              this.connectionData.walletPubkey,
+              event.content
+            );
+          } catch {
+            // Both failed, throw original error
+            throw nip44Error;
+          }
+        }
+      }
+
+      const response = JSON.parse(decrypted) as NwcResponse;
+
+      // Check if the decrypted response contains an encryption error
+      if (response.error) {
+        const errorMsg = response.error.message || '';
+        if (
+          !pending.isRetry &&
+          this.encryptionMode === 'nip44' &&
+          this.isEncryptionError(errorMsg)
+        ) {
+          this.log(
+            'warn',
+            `Wallet returned encryption error: ${errorMsg}, retrying with NIP-04`
+          );
+          try {
+            const retryResponse = await this.retryWithNip04(pending.request);
+            pending.resolve(retryResponse);
+            return;
+          } catch (retryError) {
+            pending.reject(retryError as Error);
+            return;
+          }
+        }
+        this.log('error', `Wallet error: ${errorMsg}`);
+      } else {
+        this.log('info', 'Request successful');
+      }
+
+      pending.resolve(response);
+    } catch (error) {
+      const errorMsg = (error as Error).message;
+      this.log('error', `Failed to decrypt response: ${errorMsg}`);
+
+      // If this is an encryption error and we haven't retried, try NIP-04
+      if (
+        !pending.isRetry &&
+        this.encryptionMode === 'nip44' &&
+        this.isEncryptionError(errorMsg)
+      ) {
+        this.log('warn', 'Decryption failed, retrying with NIP-04 encryption');
+        try {
+          const retryResponse = await this.retryWithNip04(pending.request);
+          pending.resolve(retryResponse);
+          return;
+        } catch (retryError) {
+          pending.reject(retryError as Error);
+          return;
+        }
+      }
+
+      pending.reject(new Error(`Failed to decrypt response: ${errorMsg}`));
+    }
+  }
+}

projects/common/src/lib/services/nwc/nwc.service.ts

@@ -0,0 +1,416 @@
+import { Injectable } from '@angular/core';
+import { BehaviorSubject } from 'rxjs';
+import { StorageService, NwcConnection_DECRYPTED } from '@common';
+import { NwcClient, NwcConnectionData, NwcLogLevel, NwcLogCallback } from './nwc-client';
+import {
+  NwcGetInfoResult,
+  NwcPayInvoiceResult,
+  NwcMakeInvoiceResult,
+  NwcListTransactionsParams,
+  NwcLookupInvoiceResult,
+} from './types';
+import { parseNwcUrl } from '../storage/related/nwc';
+
+export interface NwcLogEntry {
+  timestamp: Date;
+  level: NwcLogLevel;
+  message: string;
+}
+
+interface CachedClient {
+  client: NwcClient;
+  connectionId: string;
+}
+
+/**
+ * Angular service for managing NWC wallet connections
+ */
+@Injectable({
+  providedIn: 'root',
+})
+export class NwcService {
+  private clients = new Map<string, CachedClient>();
+  private _logs$ = new BehaviorSubject<NwcLogEntry[]>([]);
+  private maxLogs = 100;
+
+  /** Observable stream of NWC log entries */
+  readonly logs$ = this._logs$.asObservable();
+
+  constructor(private storageService: StorageService) {}
+
+  /** Get current logs */
+  get logs(): NwcLogEntry[] {
+    return this._logs$.value;
+  }
+
+  /** Clear all logs */
+  clearLogs(): void {
+    this._logs$.next([]);
+  }
+
+  /** Add a log entry */
+  private addLog(level: NwcLogLevel, message: string): void {
+    const entry: NwcLogEntry = {
+      timestamp: new Date(),
+      level,
+      message,
+    };
+    const logs = [entry, ...this._logs$.value].slice(0, this.maxLogs);
+    this._logs$.next(logs);
+  }
+
+  /** Create a log callback for the NWC client */
+  private createLogCallback(): NwcLogCallback {
+    return (level: NwcLogLevel, message: string) => {
+      this.addLog(level, message);
+    };
+  }
+
+  /**
+   * Parse and validate an NWC URL
+   */
+  parseNwcUrl(url: string): {
+    walletPubkey: string;
+    relayUrl: string;
+    secret: string;
+    lud16?: string;
+  } | null {
+    return parseNwcUrl(url);
+  }
+
+  /**
+   * Get all NWC connections from storage
+   */
+  getConnections(): NwcConnection_DECRYPTED[] {
+    const sessionData =
+      this.storageService.getBrowserSessionHandler().browserSessionData;
+    return sessionData?.nwcConnections ?? [];
+  }
+
+  /**
+   * Get a single NWC connection by ID
+   */
+  getConnection(connectionId: string): NwcConnection_DECRYPTED | undefined {
+    return this.getConnections().find((c) => c.id === connectionId);
+  }
+
+  /**
+   * Add a new NWC connection
+   */
+  async addConnection(name: string, connectionUrl: string): Promise<void> {
+    await this.storageService.addNwcConnection({ name, connectionUrl });
+  }
+
+  /**
+   * Delete an NWC connection
+   */
+  async deleteConnection(connectionId: string): Promise<void> {
+    // Disconnect and remove the client if it exists
+    this.disconnectClient(connectionId);
+    await this.storageService.deleteNwcConnection(connectionId);
+  }
+
+  /**
+   * Get a connected client for a connection, creating it if necessary
+   */
+  private async getClient(connectionId: string): Promise<NwcClient> {
+    // Check if we have a cached client
+    const cached = this.clients.get(connectionId);
+    if (cached && cached.client.isConnected()) {
+      return cached.client;
+    }
+
+    // Get the connection data
+    const connection = this.getConnection(connectionId);
+    if (!connection) {
+      throw new Error('Connection not found');
+    }
+
+    // Create a new client
+    const connectionData: NwcConnectionData = {
+      walletPubkey: connection.walletPubkey,
+      relayUrl: connection.relayUrl,
+      secret: connection.secret,
+    };
+
+    const client = new NwcClient(connectionData, this.createLogCallback());
+    await client.connect();
+
+    // Cache the client
+    this.clients.set(connectionId, {
+      client,
+      connectionId,
+    });
+
+    return client;
+  }
+
+  /**
+   * Disconnect a client
+   */
+  private disconnectClient(connectionId: string): void {
+    const cached = this.clients.get(connectionId);
+    if (cached) {
+      cached.client.disconnect();
+      this.clients.delete(connectionId);
+    }
+  }
+
+  /**
+   * Disconnect all clients
+   */
+  disconnectAll(): void {
+    for (const cached of this.clients.values()) {
+      cached.client.disconnect();
+    }
+    this.clients.clear();
+  }
+
+  /**
+   * Get wallet info for a connection
+   */
+  async getInfo(connectionId: string): Promise<NwcGetInfoResult> {
+    const client = await this.getClient(connectionId);
+    return client.getInfo();
+  }
+
+  /**
+   * Get balance for a connection (in millisatoshis)
+   */
+  async getBalance(connectionId: string): Promise<number> {
+    const client = await this.getClient(connectionId);
+    const result = await client.getBalance();
+
+    // Update the cached balance in storage
+    await this.storageService.updateNwcConnectionBalance(
+      connectionId,
+      result.balance
+    );
+
+    return result.balance;
+  }
+
+  /**
+   * Get balances for all connections
+   * Returns a map of connectionId -> balance in millisatoshis
+   */
+  async getAllBalances(): Promise<Map<string, number>> {
+    const balances = new Map<string, number>();
+    const connections = this.getConnections();
+
+    const results = await Promise.allSettled(
+      connections.map(async (conn) => {
+        try {
+          const balance = await this.getBalance(conn.id);
+          return { id: conn.id, balance };
+        } catch (error) {
+          // Return cached balance if available
+          if (conn.cachedBalance !== undefined) {
+            return { id: conn.id, balance: conn.cachedBalance };
+          }
+          throw error;
+        }
+      })
+    );
+
+    for (const result of results) {
+      if (result.status === 'fulfilled') {
+        balances.set(result.value.id, result.value.balance);
+      }
+    }
+
+    return balances;
+  }
+
+  /**
+   * Get total balance across all connections (in millisatoshis)
+   */
+  async getTotalBalance(): Promise<number> {
+    const balances = await this.getAllBalances();
+    let total = 0;
+    for (const balance of balances.values()) {
+      total += balance;
+    }
+    return total;
+  }
+
+  /**
+   * Get cached total balance (without making network requests)
+   */
+  getCachedTotalBalance(): number {
+    const connections = this.getConnections();
+    let total = 0;
+    for (const conn of connections) {
+      if (conn.cachedBalance !== undefined) {
+        total += conn.cachedBalance;
+      }
+    }
+    return total;
+  }
+
+  /**
+   * Pay a Lightning invoice
+   */
+  async payInvoice(
+    connectionId: string,
+    invoice: string,
+    amountMsat?: number
+  ): Promise<NwcPayInvoiceResult> {
+    const client = await this.getClient(connectionId);
+    const result = await client.payInvoice({
+      invoice,
+      amount: amountMsat,
+    });
+
+    // Refresh balance after payment
+    try {
+      await this.getBalance(connectionId);
+    } catch {
+      // Ignore balance refresh errors
+    }
+
+    return result;
+  }
+
+  /**
+   * Create a Lightning invoice
+   */
+  async makeInvoice(
+    connectionId: string,
+    amountMsat: number,
+    description?: string
+  ): Promise<NwcMakeInvoiceResult> {
+    const client = await this.getClient(connectionId);
+    return client.makeInvoice({
+      amount: amountMsat,
+      description,
+    });
+  }
+
+  /**
+   * List transaction history
+   */
+  async listTransactions(
+    connectionId: string,
+    params?: NwcListTransactionsParams
+  ): Promise<NwcLookupInvoiceResult[]> {
+    const client = await this.getClient(connectionId);
+    const result = await client.listTransactions(params);
+    return result.transactions;
+  }
+
+  /**
+   * Resolve a Lightning Address (user@domain.com) to a bolt11 invoice
+   * Uses LNURL-pay protocol
+   */
+  async resolveLightningAddress(
+    address: string,
+    amountMsat: number
+  ): Promise<string> {
+    // Parse lightning address
+    const match = address.match(/^([^@]+)@([^@]+)$/);
+    if (!match) {
+      throw new Error('Invalid lightning address format');
+    }
+
+    const [, name, domain] = match;
+
+    // Fetch LNURL-pay endpoint
+    const lnurlpUrl = `https://${domain}/.well-known/lnurlp/${name}`;
+    this.addLog('info', `Fetching LNURL-pay from ${domain}...`);
+
+    const response = await fetch(lnurlpUrl);
+    if (!response.ok) {
+      throw new Error(`Failed to fetch LNURL-pay: ${response.status}`);
+    }
+
+    const lnurlpData = await response.json();
+
+    // Validate response
+    if (lnurlpData.status === 'ERROR') {
+      throw new Error(lnurlpData.reason || 'LNURL-pay error');
+    }
+
+    if (!lnurlpData.callback) {
+      throw new Error('Invalid LNURL-pay response: missing callback');
+    }
+
+    // Check amount bounds
+    const minSendable = lnurlpData.minSendable || 1000;
+    const maxSendable = lnurlpData.maxSendable || 100000000000;
+
+    if (amountMsat < minSendable) {
+      throw new Error(
+        `Amount too small. Minimum: ${Math.ceil(minSendable / 1000)} sats`
+      );
+    }
+
+    if (amountMsat > maxSendable) {
+      throw new Error(
+        `Amount too large. Maximum: ${Math.floor(maxSendable / 1000)} sats`
+      );
+    }
+
+    // Request invoice from callback
+    const callbackUrl = new URL(lnurlpData.callback);
+    callbackUrl.searchParams.set('amount', amountMsat.toString());
+
+    this.addLog('info', 'Requesting invoice...');
+    const invoiceResponse = await fetch(callbackUrl.toString());
+    if (!invoiceResponse.ok) {
+      throw new Error(`Failed to get invoice: ${invoiceResponse.status}`);
+    }
+
+    const invoiceData = await invoiceResponse.json();
+
+    if (invoiceData.status === 'ERROR') {
+      throw new Error(invoiceData.reason || 'Failed to get invoice');
+    }
+
+    if (!invoiceData.pr) {
+      throw new Error('Invalid invoice response: missing payment request');
+    }
+
+    this.addLog('info', 'Invoice received');
+    return invoiceData.pr;
+  }
+
+  /**
+   * Check if a string is a lightning address (user@domain)
+   */
+  isLightningAddress(input: string): boolean {
+    return /^[^@\s]+@[^@\s]+\.[^@\s]+$/.test(input);
+  }
+
+  /**
+   * Check if a string is a bolt11 invoice
+   */
+  isBolt11Invoice(input: string): boolean {
+    return /^ln(bc|tb|tbs)[0-9a-z]+$/i.test(input.toLowerCase());
+  }
+
+  /**
+   * Test a connection by getting wallet info
+   */
+  async testConnection(connectionUrl: string): Promise<NwcGetInfoResult> {
+    this.addLog('info', 'Testing NWC connection...');
+    const parsed = this.parseNwcUrl(connectionUrl);
+    if (!parsed) {
+      this.addLog('error', 'Invalid NWC URL');
+      throw new Error('Invalid NWC URL');
+    }
+
+    const client = new NwcClient(parsed, this.createLogCallback());
+    try {
+      await client.connect();
+      const info = await client.getInfo();
+      this.addLog('info', `Connection test successful: ${info.alias || 'wallet'}`);
+      return info;
+    } catch (error) {
+      this.addLog('error', `Connection test failed: ${(error as Error).message}`);
+      throw error;
+    } finally {
+      client.disconnect();
+    }
+  }
+}

projects/common/src/lib/services/nwc/types.ts

@@ -0,0 +1,130 @@
+/**
+ * NIP-47 NWC Protocol Types
+ */
+
+export interface NwcRequest {
+  method: string;
+  params?: Record<string, unknown>;
+}
+
+export interface NwcResponse {
+  result_type: string;
+  error?: {
+    code: string;
+    message: string;
+  };
+  result?: Record<string, unknown>;
+}
+
+export interface NwcGetInfoResult {
+  alias?: string;
+  color?: string;
+  pubkey?: string;
+  network?: string;
+  block_height?: number;
+  block_hash?: string;
+  methods?: string[];
+}
+
+export interface NwcGetBalanceResult {
+  balance: number; // Balance in millisatoshis
+}
+
+export interface NwcPayInvoiceParams {
+  invoice: string;
+  amount?: number; // Optional amount in millisatoshis (for zero-amount invoices)
+}
+
+export interface NwcPayInvoiceResult {
+  preimage: string;
+}
+
+export interface NwcMakeInvoiceParams {
+  amount: number; // Amount in millisatoshis
+  description?: string;
+  description_hash?: string;
+  expiry?: number; // Expiry in seconds
+}
+
+export interface NwcMakeInvoiceResult {
+  type: 'incoming';
+  invoice: string;
+  description?: string;
+  description_hash?: string;
+  preimage?: string;
+  payment_hash: string;
+  amount: number;
+  fees_paid?: number;
+  created_at: number;
+  expires_at: number;
+  settled_at?: number;
+  metadata?: Record<string, unknown>;
+}
+
+export interface NwcLookupInvoiceParams {
+  payment_hash?: string;
+  invoice?: string;
+}
+
+export interface NwcLookupInvoiceResult {
+  type: 'incoming' | 'outgoing';
+  invoice?: string;
+  description?: string;
+  description_hash?: string;
+  preimage?: string;
+  payment_hash: string;
+  amount: number;
+  fees_paid?: number;
+  created_at: number;
+  expires_at?: number;
+  settled_at?: number;
+  metadata?: Record<string, unknown>;
+}
+
+export interface NwcListTransactionsParams {
+  from?: number;
+  until?: number;
+  limit?: number;
+  offset?: number;
+  unpaid?: boolean;
+  type?: 'incoming' | 'outgoing';
+}
+
+export interface NwcListTransactionsResult {
+  transactions: NwcLookupInvoiceResult[];
+}
+
+/**
+ * NWC Error Codes
+ */
+export const NWC_ERROR_CODES = {
+  RATE_LIMITED: 'RATE_LIMITED',
+  NOT_IMPLEMENTED: 'NOT_IMPLEMENTED',
+  INSUFFICIENT_BALANCE: 'INSUFFICIENT_BALANCE',
+  QUOTA_EXCEEDED: 'QUOTA_EXCEEDED',
+  RESTRICTED: 'RESTRICTED',
+  UNAUTHORIZED: 'UNAUTHORIZED',
+  INTERNAL: 'INTERNAL',
+  OTHER: 'OTHER',
+  PAYMENT_FAILED: 'PAYMENT_FAILED',
+  NOT_FOUND: 'NOT_FOUND',
+} as const;
+
+export type NwcErrorCode = (typeof NWC_ERROR_CODES)[keyof typeof NWC_ERROR_CODES];
+
+/**
+ * NWC Method names (from NIP-47)
+ */
+export const NWC_METHODS = {
+  GET_INFO: 'get_info',
+  GET_BALANCE: 'get_balance',
+  PAY_INVOICE: 'pay_invoice',
+  MAKE_INVOICE: 'make_invoice',
+  LOOKUP_INVOICE: 'lookup_invoice',
+  LIST_TRANSACTIONS: 'list_transactions',
+  PAY_KEYSEND: 'pay_keysend',
+  MULTI_PAY_INVOICE: 'multi_pay_invoice',
+  MULTI_PAY_KEYSEND: 'multi_pay_keysend',
+} as const;
+
+export type NwcMethod = (typeof NWC_METHODS)[keyof typeof NWC_METHODS];

projects/common/src/lib/services/storage/browser-sync-handler.ts

@@ -1,7 +1,9 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import {
   BrowserSyncData,
+  CashuMint_ENCRYPTED,
   Identity_ENCRYPTED,
+  NwcConnection_ENCRYPTED,
   Permission_ENCRYPTED,
   Relay_ENCRYPTED,
 } from './types';
@@ -104,6 +106,38 @@ export abstract class BrowserSyncHandler {
     this.#browserSyncData.relays = Array.from(data.relays);
   }
 
+  /**
+   * Persist the NWC connections to the sync data storage.
+   *
+   * ATTENTION: In your implementation, make sure to call "setPartialData_NwcConnections(..)" at the end to update the in-memory data.
+   */
+  abstract saveAndSetPartialData_NwcConnections(data: {
+    nwcConnections: NwcConnection_ENCRYPTED[];
+  }): Promise<void>;
+  setPartialData_NwcConnections(data: {
+    nwcConnections: NwcConnection_ENCRYPTED[];
+  }) {
+    if (!this.#browserSyncData) {
+      return;
+    }
+    this.#browserSyncData.nwcConnections = Array.from(data.nwcConnections);
+  }
+
+  /**
+   * Persist the Cashu mints to the sync data storage.
+   *
+   * ATTENTION: In your implementation, make sure to call "setPartialData_CashuMints(..)" at the end to update the in-memory data.
+   */
+  abstract saveAndSetPartialData_CashuMints(data: {
+    cashuMints: CashuMint_ENCRYPTED[];
+  }): Promise<void>;
+  setPartialData_CashuMints(data: { cashuMints: CashuMint_ENCRYPTED[] }) {
+    if (!this.#browserSyncData) {
+      return;
+    }
+    this.#browserSyncData.cashuMints = Array.from(data.cashuMints);
+  }
+
   /**
    * Clear all data from the sync data storage.
    */

projects/common/src/lib/services/storage/related/cashu.ts

@@ -0,0 +1,361 @@
+import {
+  CryptoHelper,
+  CashuMint_DECRYPTED,
+  CashuMint_ENCRYPTED,
+  CashuProof,
+  StorageService,
+} from '@common';
+import { LockedVaultContext } from './identity';
+
+/**
+ * Validate a Cashu mint URL
+ */
+export function isValidMintUrl(url: string): boolean {
+  try {
+    const parsed = new URL(url);
+    return parsed.protocol === 'https:' || parsed.protocol === 'http:';
+  } catch {
+    return false;
+  }
+}
+
+export const addCashuMint = async function (
+  this: StorageService,
+  data: {
+    name: string;
+    mintUrl: string;
+    unit?: string;
+  }
+): Promise<CashuMint_DECRYPTED> {
+  this.assureIsInitialized();
+
+  // Validate the mint URL
+  if (!isValidMintUrl(data.mintUrl)) {
+    throw new Error('Invalid mint URL format');
+  }
+
+  // Normalize URL (remove trailing slash)
+  const normalizedUrl = data.mintUrl.replace(/\/$/, '');
+
+  // Check if a mint with the same URL already exists
+  const existingMint = (
+    this.getBrowserSessionHandler().browserSessionData?.cashuMints ?? []
+  ).find((x) => x.mintUrl === normalizedUrl);
+  if (existingMint) {
+    throw new Error(
+      `A connection to this mint already exists: ${existingMint.name}`
+    );
+  }
+
+  const browserSessionData = this.getBrowserSessionHandler().browserSessionData;
+  if (!browserSessionData) {
+    throw new Error('Browser session data is undefined.');
+  }
+
+  const decryptedMint: CashuMint_DECRYPTED = {
+    id: CryptoHelper.v4(),
+    name: data.name,
+    mintUrl: normalizedUrl,
+    unit: data.unit ?? 'sat',
+    createdAt: new Date().toISOString(),
+    proofs: [], // Start with no proofs
+    cachedBalance: 0,
+    cachedBalanceAt: new Date().toISOString(),
+  };
+
+  // Initialize array if needed
+  if (!browserSessionData.cashuMints) {
+    browserSessionData.cashuMints = [];
+  }
+
+  // Add the new mint to the session data
+  browserSessionData.cashuMints.push(decryptedMint);
+  this.getBrowserSessionHandler().saveFullData(browserSessionData);
+
+  // Encrypt the new mint and add it to the sync data
+  const encryptedMint = await encryptCashuMint.call(this, decryptedMint);
+  const encryptedMints = [
+    ...(this.getBrowserSyncHandler().browserSyncData?.cashuMints ?? []),
+    encryptedMint,
+  ];
+
+  await this.getBrowserSyncHandler().saveAndSetPartialData_CashuMints({
+    cashuMints: encryptedMints,
+  });
+
+  return decryptedMint;
+};
+
+export const deleteCashuMint = async function (
+  this: StorageService,
+  mintId: string
+): Promise<void> {
+  this.assureIsInitialized();
+
+  if (!mintId) {
+    return;
+  }
+
+  const browserSessionData = this.getBrowserSessionHandler().browserSessionData;
+  const browserSyncData = this.getBrowserSyncHandler().browserSyncData;
+  if (!browserSessionData || !browserSyncData) {
+    throw new Error('Browser session or sync data is undefined.');
+  }
+
+  // Remove from session data
+  browserSessionData.cashuMints = (browserSessionData.cashuMints ?? []).filter(
+    (x) => x.id !== mintId
+  );
+  await this.getBrowserSessionHandler().saveFullData(browserSessionData);
+
+  // Handle Sync data
+  const encryptedMintId = await this.encrypt(mintId);
+  await this.getBrowserSyncHandler().saveAndSetPartialData_CashuMints({
+    cashuMints: (browserSyncData.cashuMints ?? []).filter(
+      (x) => x.id !== encryptedMintId
+    ),
+  });
+};
+
+/**
+ * Update the proofs for a Cashu mint
+ * This is called after send/receive operations
+ */
+export const updateCashuMintProofs = async function (
+  this: StorageService,
+  mintId: string,
+  proofs: CashuProof[]
+): Promise<void> {
+  this.assureIsInitialized();
+
+  const browserSessionData = this.getBrowserSessionHandler().browserSessionData;
+  const browserSyncData = this.getBrowserSyncHandler().browserSyncData;
+  if (!browserSessionData || !browserSyncData) {
+    throw new Error('Browser session or sync data is undefined.');
+  }
+
+  const sessionMint = (browserSessionData.cashuMints ?? []).find(
+    (x) => x.id === mintId
+  );
+  const encryptedMintId = await this.encrypt(mintId);
+  const syncMint = (browserSyncData.cashuMints ?? []).find(
+    (x) => x.id === encryptedMintId
+  );
+
+  if (!sessionMint || !syncMint) {
+    throw new Error('Cashu mint not found for proofs update.');
+  }
+
+  const now = new Date().toISOString();
+  // Calculate balance from proofs (sum of all proof amounts in satoshis)
+  const balance = proofs.reduce((sum, p) => sum + p.amount, 0);
+
+  // Update session data
+  sessionMint.proofs = proofs;
+  sessionMint.cachedBalance = balance;
+  sessionMint.cachedBalanceAt = now;
+  await this.getBrowserSessionHandler().saveFullData(browserSessionData);
+
+  // Update sync data
+  syncMint.proofs = await this.encrypt(JSON.stringify(proofs));
+  syncMint.cachedBalance = await this.encrypt(balance.toString());
+  syncMint.cachedBalanceAt = await this.encrypt(now);
+  await this.getBrowserSyncHandler().saveAndSetPartialData_CashuMints({
+    cashuMints: browserSyncData.cashuMints ?? [],
+  });
+};
+
+export const encryptCashuMint = async function (
+  this: StorageService,
+  mint: CashuMint_DECRYPTED
+): Promise<CashuMint_ENCRYPTED> {
+  const encrypted: CashuMint_ENCRYPTED = {
+    id: await this.encrypt(mint.id),
+    name: await this.encrypt(mint.name),
+    mintUrl: await this.encrypt(mint.mintUrl),
+    unit: await this.encrypt(mint.unit),
+    createdAt: await this.encrypt(mint.createdAt),
+    proofs: await this.encrypt(JSON.stringify(mint.proofs)),
+  };
+
+  if (mint.cachedBalance !== undefined) {
+    encrypted.cachedBalance = await this.encrypt(mint.cachedBalance.toString());
+  }
+  if (mint.cachedBalanceAt) {
+    encrypted.cachedBalanceAt = await this.encrypt(mint.cachedBalanceAt);
+  }
+
+  return encrypted;
+};
+
+export const decryptCashuMint = async function (
+  this: StorageService,
+  mint: CashuMint_ENCRYPTED,
+  withLockedVault: LockedVaultContext | undefined = undefined
+): Promise<CashuMint_DECRYPTED> {
+  if (typeof withLockedVault === 'undefined') {
+    // Normal decryption with unlocked vault
+    const proofsJson = await this.decrypt(mint.proofs, 'string');
+    const decrypted: CashuMint_DECRYPTED = {
+      id: await this.decrypt(mint.id, 'string'),
+      name: await this.decrypt(mint.name, 'string'),
+      mintUrl: await this.decrypt(mint.mintUrl, 'string'),
+      unit: await this.decrypt(mint.unit, 'string'),
+      createdAt: await this.decrypt(mint.createdAt, 'string'),
+      proofs: JSON.parse(proofsJson) as CashuProof[],
+    };
+
+    if (mint.cachedBalance) {
+      decrypted.cachedBalance = await this.decrypt(mint.cachedBalance, 'number');
+    }
+    if (mint.cachedBalanceAt) {
+      decrypted.cachedBalanceAt = await this.decrypt(
+        mint.cachedBalanceAt,
+        'string'
+      );
+    }
+
+    return decrypted;
+  }
+
+  // v2: Use pre-derived key
+  if (withLockedVault.keyBase64) {
+    const proofsJson = await this.decryptWithLockedVaultV2(
+      mint.proofs,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.keyBase64
+    );
+    const decrypted: CashuMint_DECRYPTED = {
+      id: await this.decryptWithLockedVaultV2(
+        mint.id,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      name: await this.decryptWithLockedVaultV2(
+        mint.name,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      mintUrl: await this.decryptWithLockedVaultV2(
+        mint.mintUrl,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      unit: await this.decryptWithLockedVaultV2(
+        mint.unit,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      createdAt: await this.decryptWithLockedVaultV2(
+        mint.createdAt,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      proofs: JSON.parse(proofsJson) as CashuProof[],
+    };
+
+    if (mint.cachedBalance) {
+      decrypted.cachedBalance = await this.decryptWithLockedVaultV2(
+        mint.cachedBalance,
+        'number',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      );
+    }
+    if (mint.cachedBalanceAt) {
+      decrypted.cachedBalanceAt = await this.decryptWithLockedVaultV2(
+        mint.cachedBalanceAt,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      );
+    }
+
+    return decrypted;
+  }
+
+  // v1: Use password (PBKDF2)
+  const proofsJson = await this.decryptWithLockedVault(
+    mint.proofs,
+    'string',
+    withLockedVault.iv,
+    withLockedVault.password!
+  );
+  const decrypted: CashuMint_DECRYPTED = {
+    id: await this.decryptWithLockedVault(
+      mint.id,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    name: await this.decryptWithLockedVault(
+      mint.name,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    mintUrl: await this.decryptWithLockedVault(
+      mint.mintUrl,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    unit: await this.decryptWithLockedVault(
+      mint.unit,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    createdAt: await this.decryptWithLockedVault(
+      mint.createdAt,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    proofs: JSON.parse(proofsJson) as CashuProof[],
+  };
+
+  if (mint.cachedBalance) {
+    decrypted.cachedBalance = await this.decryptWithLockedVault(
+      mint.cachedBalance,
+      'number',
+      withLockedVault.iv,
+      withLockedVault.password!
+    );
+  }
+  if (mint.cachedBalanceAt) {
+    decrypted.cachedBalanceAt = await this.decryptWithLockedVault(
+      mint.cachedBalanceAt,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    );
+  }
+
+  return decrypted;
+};
+
+export const decryptCashuMints = async function (
+  this: StorageService,
+  mints: CashuMint_ENCRYPTED[],
+  withLockedVault: LockedVaultContext | undefined = undefined
+): Promise<CashuMint_DECRYPTED[]> {
+  const decryptedMints: CashuMint_DECRYPTED[] = [];
+
+  for (const mint of mints) {
+    const decryptedMint = await decryptCashuMint.call(
+      this,
+      mint,
+      withLockedVault
+    );
+    decryptedMints.push(decryptedMint);
+  }
+
+  return decryptedMints;
+};

projects/common/src/lib/services/storage/related/nwc.ts

@@ -0,0 +1,419 @@
+import {
+  CryptoHelper,
+  NwcConnection_DECRYPTED,
+  NwcConnection_ENCRYPTED,
+  StorageService,
+} from '@common';
+import { LockedVaultContext } from './identity';
+
+/**
+ * Parse a nostr+walletconnect:// URL into its components
+ */
+export function parseNwcUrl(url: string): {
+  walletPubkey: string;
+  relayUrl: string;
+  secret: string;
+  lud16?: string;
+} | null {
+  try {
+    // Format: nostr+walletconnect://<pubkey>?relay=<url>&secret=<hex>&lud16=<optional>
+    const match = url.match(/^nostr\+walletconnect:\/\/([a-f0-9]{64})\?(.+)$/i);
+    if (!match) {
+      return null;
+    }
+
+    const walletPubkey = match[1].toLowerCase();
+    const params = new URLSearchParams(match[2]);
+
+    const relayUrl = params.get('relay');
+    const secret = params.get('secret');
+    const lud16 = params.get('lud16') || undefined;
+
+    if (!relayUrl || !secret) {
+      return null;
+    }
+
+    // Validate secret is 64-char hex
+    if (!/^[a-f0-9]{64}$/i.test(secret)) {
+      return null;
+    }
+
+    return {
+      walletPubkey,
+      relayUrl: decodeURIComponent(relayUrl),
+      secret: secret.toLowerCase(),
+      lud16,
+    };
+  } catch {
+    return null;
+  }
+}
+
+export const addNwcConnection = async function (
+  this: StorageService,
+  data: {
+    name: string;
+    connectionUrl: string;
+  }
+): Promise<void> {
+  this.assureIsInitialized();
+
+  // Parse the NWC URL
+  const parsed = parseNwcUrl(data.connectionUrl);
+  if (!parsed) {
+    throw new Error('Invalid NWC URL format');
+  }
+
+  // Check if a connection with the same wallet pubkey already exists
+  const existingConnection = (
+    this.getBrowserSessionHandler().browserSessionData?.nwcConnections ?? []
+  ).find((x) => x.walletPubkey === parsed.walletPubkey);
+  if (existingConnection) {
+    throw new Error(
+      `A connection to this wallet already exists: ${existingConnection.name}`
+    );
+  }
+
+  const browserSessionData = this.getBrowserSessionHandler().browserSessionData;
+  if (!browserSessionData) {
+    throw new Error('Browser session data is undefined.');
+  }
+
+  const decryptedConnection: NwcConnection_DECRYPTED = {
+    id: CryptoHelper.v4(),
+    name: data.name,
+    connectionUrl: data.connectionUrl,
+    walletPubkey: parsed.walletPubkey,
+    relayUrl: parsed.relayUrl,
+    secret: parsed.secret,
+    lud16: parsed.lud16,
+    createdAt: new Date().toISOString(),
+  };
+
+  // Initialize array if needed
+  if (!browserSessionData.nwcConnections) {
+    browserSessionData.nwcConnections = [];
+  }
+
+  // Add the new connection to the session data
+  browserSessionData.nwcConnections.push(decryptedConnection);
+  this.getBrowserSessionHandler().saveFullData(browserSessionData);
+
+  // Encrypt the new connection and add it to the sync data
+  const encryptedConnection = await encryptNwcConnection.call(
+    this,
+    decryptedConnection
+  );
+  const encryptedConnections = [
+    ...(this.getBrowserSyncHandler().browserSyncData?.nwcConnections ?? []),
+    encryptedConnection,
+  ];
+
+  await this.getBrowserSyncHandler().saveAndSetPartialData_NwcConnections({
+    nwcConnections: encryptedConnections,
+  });
+};
+
+export const deleteNwcConnection = async function (
+  this: StorageService,
+  connectionId: string
+): Promise<void> {
+  this.assureIsInitialized();
+
+  if (!connectionId) {
+    return;
+  }
+
+  const browserSessionData = this.getBrowserSessionHandler().browserSessionData;
+  const browserSyncData = this.getBrowserSyncHandler().browserSyncData;
+  if (!browserSessionData || !browserSyncData) {
+    throw new Error('Browser session or sync data is undefined.');
+  }
+
+  // Remove from session data
+  browserSessionData.nwcConnections = (
+    browserSessionData.nwcConnections ?? []
+  ).filter((x) => x.id !== connectionId);
+  await this.getBrowserSessionHandler().saveFullData(browserSessionData);
+
+  // Handle Sync data
+  const encryptedConnectionId = await this.encrypt(connectionId);
+  await this.getBrowserSyncHandler().saveAndSetPartialData_NwcConnections({
+    nwcConnections: (browserSyncData.nwcConnections ?? []).filter(
+      (x) => x.id !== encryptedConnectionId
+    ),
+  });
+};
+
+export const updateNwcConnectionBalance = async function (
+  this: StorageService,
+  connectionId: string,
+  balanceMillisats: number
+): Promise<void> {
+  this.assureIsInitialized();
+
+  const browserSessionData = this.getBrowserSessionHandler().browserSessionData;
+  const browserSyncData = this.getBrowserSyncHandler().browserSyncData;
+  if (!browserSessionData || !browserSyncData) {
+    throw new Error('Browser session or sync data is undefined.');
+  }
+
+  const sessionConnection = (browserSessionData.nwcConnections ?? []).find(
+    (x) => x.id === connectionId
+  );
+  const encryptedConnectionId = await this.encrypt(connectionId);
+  const syncConnection = (browserSyncData.nwcConnections ?? []).find(
+    (x) => x.id === encryptedConnectionId
+  );
+
+  if (!sessionConnection || !syncConnection) {
+    throw new Error('NWC connection not found for balance update.');
+  }
+
+  const now = new Date().toISOString();
+
+  // Update session data
+  sessionConnection.cachedBalance = balanceMillisats;
+  sessionConnection.cachedBalanceAt = now;
+  await this.getBrowserSessionHandler().saveFullData(browserSessionData);
+
+  // Update sync data
+  syncConnection.cachedBalance = await this.encrypt(balanceMillisats.toString());
+  syncConnection.cachedBalanceAt = await this.encrypt(now);
+  await this.getBrowserSyncHandler().saveAndSetPartialData_NwcConnections({
+    nwcConnections: browserSyncData.nwcConnections ?? [],
+  });
+};
+
+export const encryptNwcConnection = async function (
+  this: StorageService,
+  connection: NwcConnection_DECRYPTED
+): Promise<NwcConnection_ENCRYPTED> {
+  const encrypted: NwcConnection_ENCRYPTED = {
+    id: await this.encrypt(connection.id),
+    name: await this.encrypt(connection.name),
+    connectionUrl: await this.encrypt(connection.connectionUrl),
+    walletPubkey: await this.encrypt(connection.walletPubkey),
+    relayUrl: await this.encrypt(connection.relayUrl),
+    secret: await this.encrypt(connection.secret),
+    createdAt: await this.encrypt(connection.createdAt),
+  };
+
+  if (connection.lud16) {
+    encrypted.lud16 = await this.encrypt(connection.lud16);
+  }
+  if (connection.cachedBalance !== undefined) {
+    encrypted.cachedBalance = await this.encrypt(
+      connection.cachedBalance.toString()
+    );
+  }
+  if (connection.cachedBalanceAt) {
+    encrypted.cachedBalanceAt = await this.encrypt(connection.cachedBalanceAt);
+  }
+
+  return encrypted;
+};
+
+export const decryptNwcConnection = async function (
+  this: StorageService,
+  connection: NwcConnection_ENCRYPTED,
+  withLockedVault: LockedVaultContext | undefined = undefined
+): Promise<NwcConnection_DECRYPTED> {
+  if (typeof withLockedVault === 'undefined') {
+    // Normal decryption with unlocked vault
+    const decrypted: NwcConnection_DECRYPTED = {
+      id: await this.decrypt(connection.id, 'string'),
+      name: await this.decrypt(connection.name, 'string'),
+      connectionUrl: await this.decrypt(connection.connectionUrl, 'string'),
+      walletPubkey: await this.decrypt(connection.walletPubkey, 'string'),
+      relayUrl: await this.decrypt(connection.relayUrl, 'string'),
+      secret: await this.decrypt(connection.secret, 'string'),
+      createdAt: await this.decrypt(connection.createdAt, 'string'),
+    };
+
+    if (connection.lud16) {
+      decrypted.lud16 = await this.decrypt(connection.lud16, 'string');
+    }
+    if (connection.cachedBalance) {
+      decrypted.cachedBalance = await this.decrypt(
+        connection.cachedBalance,
+        'number'
+      );
+    }
+    if (connection.cachedBalanceAt) {
+      decrypted.cachedBalanceAt = await this.decrypt(
+        connection.cachedBalanceAt,
+        'string'
+      );
+    }
+
+    return decrypted;
+  }
+
+  // v2: Use pre-derived key
+  if (withLockedVault.keyBase64) {
+    const decrypted: NwcConnection_DECRYPTED = {
+      id: await this.decryptWithLockedVaultV2(
+        connection.id,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      name: await this.decryptWithLockedVaultV2(
+        connection.name,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      connectionUrl: await this.decryptWithLockedVaultV2(
+        connection.connectionUrl,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      walletPubkey: await this.decryptWithLockedVaultV2(
+        connection.walletPubkey,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      relayUrl: await this.decryptWithLockedVaultV2(
+        connection.relayUrl,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      secret: await this.decryptWithLockedVaultV2(
+        connection.secret,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+      createdAt: await this.decryptWithLockedVaultV2(
+        connection.createdAt,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      ),
+    };
+
+    if (connection.lud16) {
+      decrypted.lud16 = await this.decryptWithLockedVaultV2(
+        connection.lud16,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      );
+    }
+    if (connection.cachedBalance) {
+      decrypted.cachedBalance = await this.decryptWithLockedVaultV2(
+        connection.cachedBalance,
+        'number',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      );
+    }
+    if (connection.cachedBalanceAt) {
+      decrypted.cachedBalanceAt = await this.decryptWithLockedVaultV2(
+        connection.cachedBalanceAt,
+        'string',
+        withLockedVault.iv,
+        withLockedVault.keyBase64
+      );
+    }
+
+    return decrypted;
+  }
+
+  // v1: Use password (PBKDF2)
+  const decrypted: NwcConnection_DECRYPTED = {
+    id: await this.decryptWithLockedVault(
+      connection.id,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    name: await this.decryptWithLockedVault(
+      connection.name,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    connectionUrl: await this.decryptWithLockedVault(
+      connection.connectionUrl,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    walletPubkey: await this.decryptWithLockedVault(
+      connection.walletPubkey,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    relayUrl: await this.decryptWithLockedVault(
+      connection.relayUrl,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    secret: await this.decryptWithLockedVault(
+      connection.secret,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+    createdAt: await this.decryptWithLockedVault(
+      connection.createdAt,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    ),
+  };
+
+  if (connection.lud16) {
+    decrypted.lud16 = await this.decryptWithLockedVault(
+      connection.lud16,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    );
+  }
+  if (connection.cachedBalance) {
+    decrypted.cachedBalance = await this.decryptWithLockedVault(
+      connection.cachedBalance,
+      'number',
+      withLockedVault.iv,
+      withLockedVault.password!
+    );
+  }
+  if (connection.cachedBalanceAt) {
+    decrypted.cachedBalanceAt = await this.decryptWithLockedVault(
+      connection.cachedBalanceAt,
+      'string',
+      withLockedVault.iv,
+      withLockedVault.password!
+    );
+  }
+
+  return decrypted;
+};
+
+export const decryptNwcConnections = async function (
+  this: StorageService,
+  connections: NwcConnection_ENCRYPTED[],
+  withLockedVault: LockedVaultContext | undefined = undefined
+): Promise<NwcConnection_DECRYPTED[]> {
+  const decryptedConnections: NwcConnection_DECRYPTED[] = [];
+
+  for (const connection of connections) {
+    const decryptedConnection = await decryptNwcConnection.call(
+      this,
+      connection,
+      withLockedVault
+    );
+    decryptedConnections.push(decryptedConnection);
+  }
+
+  return decryptedConnections;
+};

projects/common/src/lib/services/storage/related/vault.ts

@@ -8,7 +8,9 @@ import {
   deriveKeyArgon2,
 } from '@common';
 import { Buffer } from 'buffer';
+import { decryptCashuMints, encryptCashuMint } from './cashu';
 import { decryptIdentities, encryptIdentity, LockedVaultContext } from './identity';
+import { decryptNwcConnections, encryptNwcConnection } from './nwc';
 import { decryptPermissions } from './permission';
 import { decryptRelays, encryptRelay } from './relay';
 
@@ -34,6 +36,8 @@ export const createNewVault = async function (
     identities: [],
     permissions: [],
     relays: [],
+    nwcConnections: [],
+    cashuMints: [],
     selectedIdentityId: null,
   };
   await this.getBrowserSessionHandler().saveFullData(sessionData);
@@ -47,6 +51,8 @@ export const createNewVault = async function (
     identities: [],
     permissions: [],
     relays: [],
+    nwcConnections: [],
+    cashuMints: [],
     selectedIdentityId: null,
   };
   await this.getBrowserSyncHandler().saveAndSetFullData(syncData);
@@ -133,6 +139,22 @@ export const unlockVault = async function (
   );
   console.log('[vault] Decrypted', decryptedRelays.length, 'relays');
 
+  console.log('[vault] Decrypting NWC connections...');
+  const decryptedNwcConnections = await decryptNwcConnections.call(
+    this,
+    browserSyncData.nwcConnections ?? [],
+    withLockedVault
+  );
+  console.log('[vault] Decrypted', decryptedNwcConnections.length, 'NWC connections');
+
+  console.log('[vault] Decrypting Cashu mints...');
+  const decryptedCashuMints = await decryptCashuMints.call(
+    this,
+    browserSyncData.cashuMints ?? [],
+    withLockedVault
+  );
+  console.log('[vault] Decrypted', decryptedCashuMints.length, 'Cashu mints');
+
   console.log('[vault] Decrypting selectedIdentityId...');
   let decryptedSelectedIdentityId: string | null = null;
   if (browserSyncData.selectedIdentityId !== null) {
@@ -163,6 +185,8 @@ export const unlockVault = async function (
     identities: decryptedIdentities,
     selectedIdentityId: decryptedSelectedIdentityId,
     relays: decryptedRelays,
+    nwcConnections: decryptedNwcConnections,
+    cashuMints: decryptedCashuMints,
   };
 
   console.log('[vault] Saving session data...');
@@ -234,6 +258,20 @@ async function migrateVaultV1ToV2(
     encryptedPermissions.push(encryptedPermission);
   }
 
+  // Re-encrypt NWC connections
+  const encryptedNwcConnections = [];
+  for (const nwcConnection of browserSessionData.nwcConnections ?? []) {
+    const encrypted = await encryptNwcConnection.call(this, nwcConnection);
+    encryptedNwcConnections.push(encrypted);
+  }
+
+  // Re-encrypt Cashu mints
+  const encryptedCashuMints = [];
+  for (const cashuMint of browserSessionData.cashuMints ?? []) {
+    const encrypted = await encryptCashuMint.call(this, cashuMint);
+    encryptedCashuMints.push(encrypted);
+  }
+
   const encryptedSelectedIdentityId = browserSessionData.selectedIdentityId
     ? await this.encrypt(browserSessionData.selectedIdentityId)
     : null;
@@ -247,6 +285,8 @@ async function migrateVaultV1ToV2(
     identities: encryptedIdentities,
     permissions: encryptedPermissions,
     relays: encryptedRelays,
+    nwcConnections: encryptedNwcConnections,
+    cashuMints: encryptedCashuMints,
     selectedIdentityId: encryptedSelectedIdentityId,
   };
 

projects/common/src/lib/services/storage/signer-meta-handler.ts

@@ -1,5 +1,6 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
-import { Bookmark, BrowserSyncFlow, SignerMetaData } from './types';
+import { Bookmark, BrowserSyncData, BrowserSyncFlow, SignerMetaData, SignerMetaData_VaultSnapshot } from './types';
+import { v4 as uuidv4 } from 'uuid';
 
 export abstract class SignerMetaHandler {
   get signerMetaData(): SignerMetaData | undefined {
@@ -8,7 +9,8 @@ export abstract class SignerMetaHandler {
 
   #signerMetaData?: SignerMetaData;
 
-  readonly metaProperties = ['syncFlow', 'vaultSnapshots', 'recklessMode', 'whitelistedHosts', 'bookmarks'];
+  readonly metaProperties = ['syncFlow', 'vaultSnapshots', 'maxBackups', 'recklessMode', 'whitelistedHosts', 'bookmarks'];
+  readonly DEFAULT_MAX_BACKUPS = 5;
   /**
    * Load the full data from the storage. If the storage is used for storing
    * other data (e.g. browser sync data when the user decided to NOT sync),
@@ -111,4 +113,120 @@ export abstract class SignerMetaHandler {
   getBookmarks(): Bookmark[] {
     return this.#signerMetaData?.bookmarks ?? [];
   }
+
+  /**
+   * Gets the maximum number of backups to keep.
+   */
+  getMaxBackups(): number {
+    return this.#signerMetaData?.maxBackups ?? this.DEFAULT_MAX_BACKUPS;
+  }
+
+  /**
+   * Sets the maximum number of backups to keep and immediately saves it.
+   */
+  async setMaxBackups(count: number): Promise<void> {
+    const clampedCount = Math.max(1, Math.min(20, count)); // Clamp between 1-20
+    if (!this.#signerMetaData) {
+      this.#signerMetaData = {
+        maxBackups: clampedCount,
+      };
+    } else {
+      this.#signerMetaData.maxBackups = clampedCount;
+    }
+
+    await this.saveFullData(this.#signerMetaData);
+  }
+
+  /**
+   * Gets all vault backups, sorted newest first.
+   */
+  getBackups(): SignerMetaData_VaultSnapshot[] {
+    const backups = this.#signerMetaData?.vaultSnapshots ?? [];
+    return [...backups].sort((a, b) =>
+      new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime()
+    );
+  }
+
+  /**
+   * Gets a specific backup by ID.
+   */
+  getBackupById(id: string): SignerMetaData_VaultSnapshot | undefined {
+    return this.#signerMetaData?.vaultSnapshots?.find(b => b.id === id);
+  }
+
+  /**
+   * Creates a new backup of the vault data.
+   * Automatically removes old backups if exceeding maxBackups.
+   */
+  async createBackup(
+    browserSyncData: BrowserSyncData,
+    reason: 'manual' | 'auto' | 'pre-restore' = 'manual'
+  ): Promise<SignerMetaData_VaultSnapshot> {
+    const now = new Date();
+    const dateTimeString = now.toISOString().replace(/[:.]/g, '-').slice(0, 19);
+    const identityCount = browserSyncData.identities?.length ?? 0;
+
+    const snapshot: SignerMetaData_VaultSnapshot = {
+      id: uuidv4(),
+      fileName: `Vault Backup - ${dateTimeString}`,
+      createdAt: now.toISOString(),
+      data: JSON.parse(JSON.stringify(browserSyncData)), // Deep clone
+      identityCount,
+      reason,
+    };
+
+    if (!this.#signerMetaData) {
+      this.#signerMetaData = {
+        vaultSnapshots: [snapshot],
+      };
+    } else {
+      const existingBackups = this.#signerMetaData.vaultSnapshots ?? [];
+      existingBackups.push(snapshot);
+
+      // Enforce max backups limit (only for auto backups, keep manual and pre-restore)
+      const maxBackups = this.getMaxBackups();
+      const autoBackups = existingBackups.filter(b => b.reason === 'auto');
+      const otherBackups = existingBackups.filter(b => b.reason !== 'auto');
+
+      // Sort auto backups by date (newest first) and keep only maxBackups
+      autoBackups.sort((a, b) =>
+        new Date(b.createdAt).getTime() - new Date(a.createdAt).getTime()
+      );
+      const trimmedAutoBackups = autoBackups.slice(0, maxBackups);
+
+      this.#signerMetaData.vaultSnapshots = [...otherBackups, ...trimmedAutoBackups];
+    }
+
+    await this.saveFullData(this.#signerMetaData);
+    return snapshot;
+  }
+
+  /**
+   * Deletes a backup by ID.
+   */
+  async deleteBackup(backupId: string): Promise<boolean> {
+    if (!this.#signerMetaData?.vaultSnapshots) {
+      return false;
+    }
+
+    const initialLength = this.#signerMetaData.vaultSnapshots.length;
+    this.#signerMetaData.vaultSnapshots = this.#signerMetaData.vaultSnapshots.filter(
+      b => b.id !== backupId
+    );
+
+    if (this.#signerMetaData.vaultSnapshots.length < initialLength) {
+      await this.saveFullData(this.#signerMetaData);
+      return true;
+    }
+    return false;
+  }
+
+  /**
+   * Gets the data from a backup for restoration.
+   * Note: The caller should create a pre-restore backup before calling this.
+   */
+  getBackupData(backupId: string): BrowserSyncData | undefined {
+    const backup = this.getBackupById(backupId);
+    return backup?.data;
+  }
 }

projects/common/src/lib/services/storage/storage.service.ts

@@ -20,6 +20,17 @@ import {
 import { deletePermission } from './related/permission';
 import { createNewVault, deleteVault, unlockVault } from './related/vault';
 import { addRelay, deleteRelay, updateRelay } from './related/relay';
+import {
+  addNwcConnection,
+  deleteNwcConnection,
+  updateNwcConnectionBalance,
+} from './related/nwc';
+import {
+  addCashuMint,
+  deleteCashuMint,
+  updateCashuMintProofs,
+} from './related/cashu';
+import { CashuMint_DECRYPTED, CashuProof } from './types';
 
 export interface StorageServiceConfig {
   browserSessionHandler: BrowserSessionHandler;
@@ -176,6 +187,43 @@ export class StorageService {
     await updateRelay.call(this, relayClone);
   }
 
+  async addNwcConnection(data: {
+    name: string;
+    connectionUrl: string;
+  }): Promise<void> {
+    await addNwcConnection.call(this, data);
+  }
+
+  async deleteNwcConnection(connectionId: string): Promise<void> {
+    await deleteNwcConnection.call(this, connectionId);
+  }
+
+  async updateNwcConnectionBalance(
+    connectionId: string,
+    balanceMillisats: number
+  ): Promise<void> {
+    await updateNwcConnectionBalance.call(this, connectionId, balanceMillisats);
+  }
+
+  async addCashuMint(data: {
+    name: string;
+    mintUrl: string;
+    unit?: string;
+  }): Promise<CashuMint_DECRYPTED> {
+    return await addCashuMint.call(this, data);
+  }
+
+  async deleteCashuMint(mintId: string): Promise<void> {
+    await deleteCashuMint.call(this, mintId);
+  }
+
+  async updateCashuMintProofs(
+    mintId: string,
+    proofs: CashuProof[]
+  ): Promise<void> {
+    await updateCashuMintProofs.call(this, mintId, proofs);
+  }
+
   exportVault(): string {
     this.assureIsInitialized();
     const vaultJson = JSON.stringify(
@@ -226,6 +274,17 @@ export class StorageService {
     return this.#signerMetaHandler;
   }
 
+  /**
+   * Get the current browser sync flow setting.
+   * Returns NO_SYNC if not initialized or no setting found.
+   */
+  getSyncFlow(): BrowserSyncFlow {
+    if (!this.isInitialized || !this.#signerMetaHandler?.signerMetaData) {
+      return BrowserSyncFlow.NO_SYNC;
+    }
+    return this.#signerMetaHandler.signerMetaData.syncFlow ?? BrowserSyncFlow.NO_SYNC;
+  }
+
   /**
    * Throws an exception if the service is not initialized.
    */

projects/common/src/lib/services/storage/types.ts

@@ -43,6 +43,80 @@ export interface Relay_ENCRYPTED {
   write: string;
 }
 
+/**
+ * NWC (Nostr Wallet Connect) connection - Decrypted
+ * Stores NIP-47 wallet connection data
+ */
+export interface NwcConnection_DECRYPTED {
+  id: string;
+  name: string;                 // User-defined wallet name
+  connectionUrl: string;        // Full nostr+walletconnect:// URL
+  walletPubkey: string;         // Wallet service pubkey
+  relayUrl: string;             // Relay URL for NWC communication
+  secret: string;               // Client secret key (32-byte hex)
+  lud16?: string;               // Optional lightning address
+  createdAt: string;            // ISO timestamp
+  cachedBalance?: number;       // Balance in millisatoshis
+  cachedBalanceAt?: string;     // ISO timestamp when balance was fetched
+}
+
+/**
+ * NWC connection - Encrypted for storage
+ */
+export interface NwcConnection_ENCRYPTED {
+  id: string;
+  name: string;
+  connectionUrl: string;
+  walletPubkey: string;
+  relayUrl: string;
+  secret: string;
+  lud16?: string;
+  createdAt: string;
+  cachedBalance?: string;       // Encrypted as string
+  cachedBalanceAt?: string;
+}
+
+/**
+ * Cashu Proof - represents a single ecash token
+ * This is the actual money stored locally
+ */
+export interface CashuProof {
+  id: string;       // Keyset ID from mint
+  amount: number;   // Satoshi amount
+  secret: string;   // Blinded secret
+  C: string;        // Unblinded signature (commitment)
+  receivedAt?: string; // ISO timestamp when token was received
+}
+
+/**
+ * Cashu Mint Connection - Decrypted
+ * Stores NIP-60 Cashu mint connection data with local proofs
+ */
+export interface CashuMint_DECRYPTED {
+  id: string;
+  name: string;                 // User-defined mint name
+  mintUrl: string;              // Mint API URL
+  unit: string;                 // Unit (default: 'sat')
+  createdAt: string;            // ISO timestamp
+  proofs: CashuProof[];         // Unspent proofs for this mint
+  cachedBalance?: number;       // Sum of proof amounts (sats)
+  cachedBalanceAt?: string;     // When balance was calculated
+}
+
+/**
+ * Cashu Mint Connection - Encrypted for storage
+ */
+export interface CashuMint_ENCRYPTED {
+  id: string;
+  name: string;
+  mintUrl: string;
+  unit: string;
+  createdAt: string;
+  proofs: string;               // JSON stringified and encrypted
+  cachedBalance?: string;
+  cachedBalanceAt?: string;
+}
+
 export interface BrowserSyncData_PART_Unencrypted {
   version: number;
   iv: string;
@@ -57,6 +131,8 @@ export interface BrowserSyncData_PART_Encrypted {
   permissions: Permission_ENCRYPTED[];
   identities: Identity_ENCRYPTED[];
   relays: Relay_ENCRYPTED[];
+  nwcConnections?: NwcConnection_ENCRYPTED[];
+  cashuMints?: CashuMint_ENCRYPTED[];
 }
 
 export type BrowserSyncData = BrowserSyncData_PART_Unencrypted &
@@ -83,11 +159,17 @@ export interface BrowserSessionData {
   identities: Identity_DECRYPTED[];
   selectedIdentityId: string | null;
   relays: Relay_DECRYPTED[];
+  nwcConnections?: NwcConnection_DECRYPTED[];
+  cashuMints?: CashuMint_DECRYPTED[];
 }
 
 export interface SignerMetaData_VaultSnapshot {
+  id: string;
   fileName: string;
+  createdAt: string; // ISO timestamp
   data: BrowserSyncData;
+  identityCount: number;
+  reason?: 'manual' | 'auto' | 'pre-restore'; // Why was this backup created
 }
 
 export const SIGNER_META_DATA_KEY = {
@@ -109,6 +191,9 @@ export interface SignerMetaData {
 
   vaultSnapshots?: SignerMetaData_VaultSnapshot[];
 
+  // Maximum number of automatic backups to keep (default: 5)
+  maxBackups?: number;
+
   // Reckless mode: auto-approve all actions without prompting
   recklessMode?: boolean;
 

projects/common/src/public-api.ts

@@ -26,6 +26,13 @@ export * from './lib/services/storage/types';
 export * from './lib/services/storage/browser-sync-handler';
 export * from './lib/services/storage/browser-session-handler';
 export * from './lib/services/storage/signer-meta-handler';
+export * from './lib/services/storage/related/nwc';
+export * from './lib/services/storage/related/cashu';
+export * from './lib/services/nwc/nwc.service';
+export * from './lib/services/nwc/nwc-client';
+export * from './lib/services/nwc/types';
+export * from './lib/services/cashu/cashu.service';
+export * from './lib/services/cashu/types';
 export * from './lib/services/logger/logger.service';
 export * from './lib/services/startup/startup.service';
 export * from './lib/services/profile-metadata/profile-metadata.service';

projects/firefox/public/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": 3,
   "name": "Plebeian Signer",
   "description": "Nostr Identity Manager & Signer",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "homepage_url": "https://github.com/PlebeianApp/plebeian-signer",
   "options_page": "options.html",
   "permissions": [

projects/firefox/src/app/app.routes.ts

@@ -9,6 +9,7 @@ import { SettingsComponent } from './components/home/settings/settings.component
 import { LogsComponent } from './components/home/logs/logs.component';
 import { BookmarksComponent } from './components/home/bookmarks/bookmarks.component';
 import { WalletComponent } from './components/home/wallet/wallet.component';
+import { BackupsComponent } from './components/home/backups/backups.component';
 import { NewIdentityComponent } from './components/new-identity/new-identity.component';
 import { EditIdentityComponent } from './components/edit-identity/edit-identity.component';
 import { HomeComponent as EditIdentityHomeComponent } from './components/edit-identity/home/home.component';
@@ -81,6 +82,10 @@ export const routes: Routes = [
         path: 'wallet',
         component: WalletComponent,
       },
+      {
+        path: 'backups',
+        component: BackupsComponent,
+      },
     ],
   },
   {

projects/firefox/src/app/common/data/firefox-sync-no-handler.ts

@@ -1,7 +1,9 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import {
   BrowserSyncData,
+  CashuMint_ENCRYPTED,
   Identity_ENCRYPTED,
+  NwcConnection_ENCRYPTED,
   Permission_ENCRYPTED,
   BrowserSyncHandler,
   Relay_ENCRYPTED,
@@ -56,6 +58,20 @@ export class FirefoxSyncNoHandler extends BrowserSyncHandler {
     this.setPartialData_Relays(data);
   }
 
+  async saveAndSetPartialData_NwcConnections(data: {
+    nwcConnections: NwcConnection_ENCRYPTED[];
+  }): Promise<void> {
+    await browser.storage.local.set(data);
+    this.setPartialData_NwcConnections(data);
+  }
+
+  async saveAndSetPartialData_CashuMints(data: {
+    cashuMints: CashuMint_ENCRYPTED[];
+  }): Promise<void> {
+    await browser.storage.local.set(data);
+    this.setPartialData_CashuMints(data);
+  }
+
   async clearData(): Promise<void> {
     const props = Object.keys(await this.loadUnmigratedData());
     await browser.storage.local.remove(props);

projects/firefox/src/app/common/data/firefox-sync-yes-handler.ts

@@ -1,7 +1,9 @@
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import {
   BrowserSyncData,
+  CashuMint_ENCRYPTED,
   Identity_ENCRYPTED,
+  NwcConnection_ENCRYPTED,
   Permission_ENCRYPTED,
   BrowserSyncHandler,
   Relay_ENCRYPTED,
@@ -50,6 +52,20 @@ export class FirefoxSyncYesHandler extends BrowserSyncHandler {
     this.setPartialData_Relays(data);
   }
 
+  async saveAndSetPartialData_NwcConnections(data: {
+    nwcConnections: NwcConnection_ENCRYPTED[];
+  }): Promise<void> {
+    await browser.storage.sync.set(data);
+    this.setPartialData_NwcConnections(data);
+  }
+
+  async saveAndSetPartialData_CashuMints(data: {
+    cashuMints: CashuMint_ENCRYPTED[];
+  }): Promise<void> {
+    await browser.storage.sync.set(data);
+    this.setPartialData_CashuMints(data);
+  }
+
   async clearData(): Promise<void> {
     await browser.storage.sync.clear();
   }

projects/firefox/src/app/components/home/backups/backups.component.html

@@ -0,0 +1,79 @@
+<div class="sam-text-header">
+  <button class="lock-btn" title="Lock" (click)="onClickLock()">
+    <span class="emoji">🔒</span>
+  </button>
+  <button class="back-btn" title="Go Back" (click)="goBack()">
+    <span class="emoji">←</span>
+  </button>
+  <span>Backups</span>
+</div>
+
+<div class="backup-settings">
+  <div class="setting-row">
+    <label for="maxBackups">Max Auto Backups:</label>
+    <input
+      id="maxBackups"
+      type="number"
+      [value]="maxBackups"
+      min="1"
+      max="20"
+      (change)="onMaxBackupsChange($event)"
+    />
+  </div>
+  <p class="setting-note">
+    Automatic backups are created when significant changes are made.
+    Manual and pre-restore backups are not counted toward this limit.
+  </p>
+</div>
+
+<button class="btn btn-primary create-btn" (click)="createManualBackup()">
+  Create Backup Now
+</button>
+
+<div class="backups-list">
+  @if (backups.length === 0) {
+    <div class="empty-state">
+      <span>No backups yet</span>
+    </div>
+  }
+  @for (backup of backups; track backup.id) {
+    <div class="backup-item">
+      <div class="backup-info">
+        <span class="backup-date">{{ formatDate(backup.createdAt) }}</span>
+        <div class="backup-meta">
+          <span class="backup-reason" [class]="getReasonClass(backup.reason)">
+            {{ getReasonLabel(backup.reason) }}
+          </span>
+          <span class="backup-identities">{{ backup.identityCount }} identity(ies)</span>
+        </div>
+      </div>
+      <div class="backup-actions">
+        <button
+          class="btn btn-sm btn-secondary"
+          (click)="
+            confirm.show(
+              'Restore this backup? A backup of your current state will be created first.',
+              restoreBackup.bind(this, backup.id)
+            )
+          "
+          [disabled]="restoringBackupId !== null"
+        >
+          {{ restoringBackupId === backup.id ? 'Restoring...' : 'Restore' }}
+        </button>
+        <button
+          class="btn btn-sm btn-danger"
+          (click)="
+            confirm.show(
+              'Delete this backup? This cannot be undone.',
+              deleteBackup.bind(this, backup.id)
+            )
+          "
+        >
+          Delete
+        </button>
+      </div>
+    </div>
+  }
+</div>
+
+<lib-confirm #confirm></lib-confirm>

projects/firefox/src/app/components/home/backups/backups.component.scss

@@ -0,0 +1,192 @@
+:host {
+  display: flex;
+  flex-direction: column;
+  height: 100%;
+  padding: 8px;
+  gap: 12px;
+}
+
+.sam-text-header {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  font-size: 18px;
+  font-weight: bold;
+  padding-bottom: 8px;
+  border-bottom: 1px solid var(--border);
+}
+
+.lock-btn,
+.back-btn {
+  background: none;
+  border: none;
+  cursor: pointer;
+  padding: 4px;
+  border-radius: 4px;
+
+  &:hover {
+    background: var(--muted);
+  }
+
+  .emoji {
+    font-size: 16px;
+  }
+}
+
+.backup-settings {
+  background: var(--muted);
+  padding: 12px;
+  border-radius: 8px;
+}
+
+.setting-row {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+
+  label {
+    font-weight: 500;
+  }
+
+  input[type="number"] {
+    width: 60px;
+    padding: 4px 8px;
+    border: 1px solid var(--border);
+    border-radius: 4px;
+    background: var(--background);
+    color: var(--foreground);
+  }
+}
+
+.setting-note {
+  margin-top: 8px;
+  font-size: 12px;
+  color: var(--muted-foreground);
+}
+
+.create-btn {
+  align-self: flex-start;
+}
+
+.backups-list {
+  flex: 1;
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.empty-state {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  height: 100px;
+  color: var(--muted-foreground);
+}
+
+.backup-item {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  padding: 12px;
+  background: var(--card);
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  gap: 12px;
+}
+
+.backup-info {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+  flex: 1;
+  min-width: 0;
+}
+
+.backup-date {
+  font-weight: 500;
+  font-size: 13px;
+}
+
+.backup-meta {
+  display: flex;
+  gap: 8px;
+  font-size: 11px;
+}
+
+.backup-reason {
+  padding: 2px 6px;
+  border-radius: 4px;
+  font-weight: 500;
+
+  &.reason-auto {
+    background: var(--muted);
+    color: var(--muted-foreground);
+  }
+
+  &.reason-manual {
+    background: rgba(34, 197, 94, 0.2);
+    color: rgb(34, 197, 94);
+  }
+
+  &.reason-prerestore {
+    background: rgba(234, 179, 8, 0.2);
+    color: rgb(234, 179, 8);
+  }
+}
+
+.backup-identities {
+  color: var(--muted-foreground);
+}
+
+.backup-actions {
+  display: flex;
+  gap: 8px;
+  flex-shrink: 0;
+}
+
+.btn {
+  padding: 8px 16px;
+  border: none;
+  border-radius: 6px;
+  cursor: pointer;
+  font-weight: 500;
+  transition: background-color 0.2s;
+
+  &:disabled {
+    opacity: 0.5;
+    cursor: not-allowed;
+  }
+}
+
+.btn-primary {
+  background: var(--primary);
+  color: var(--primary-foreground);
+
+  &:hover:not(:disabled) {
+    opacity: 0.9;
+  }
+}
+
+.btn-secondary {
+  background: var(--secondary);
+  color: var(--secondary-foreground);
+
+  &:hover:not(:disabled) {
+    background: var(--muted);
+  }
+}
+
+.btn-danger {
+  background: rgba(239, 68, 68, 0.2);
+  color: rgb(239, 68, 68);
+
+  &:hover:not(:disabled) {
+    background: rgba(239, 68, 68, 0.3);
+  }
+}
+
+.btn-sm {
+  padding: 4px 10px;
+  font-size: 12px;
+}

projects/firefox/src/app/components/home/backups/backups.component.ts

@@ -0,0 +1,126 @@
+import { Component, inject, OnInit } from '@angular/core';
+import { Router } from '@angular/router';
+import {
+  ConfirmComponent,
+  LoggerService,
+  SignerMetaData_VaultSnapshot,
+  StartupService,
+  StorageService,
+} from '@common';
+import { getNewStorageServiceConfig } from '../../../common/data/get-new-storage-service-config';
+
+@Component({
+  selector: 'app-backups',
+  templateUrl: './backups.component.html',
+  styleUrl: './backups.component.scss',
+  imports: [ConfirmComponent],
+})
+export class BackupsComponent implements OnInit {
+  readonly #router = inject(Router);
+  readonly #storage = inject(StorageService);
+  readonly #startup = inject(StartupService);
+  readonly #logger = inject(LoggerService);
+
+  backups: SignerMetaData_VaultSnapshot[] = [];
+  maxBackups = 5;
+  restoringBackupId: string | null = null;
+
+  ngOnInit(): void {
+    this.loadBackups();
+    this.maxBackups = this.#storage.getSignerMetaHandler().getMaxBackups();
+  }
+
+  loadBackups(): void {
+    this.backups = this.#storage.getSignerMetaHandler().getBackups();
+  }
+
+  async onMaxBackupsChange(event: Event): Promise<void> {
+    const input = event.target as HTMLInputElement;
+    const value = parseInt(input.value, 10);
+    if (!isNaN(value) && value >= 1 && value <= 20) {
+      this.maxBackups = value;
+      await this.#storage.getSignerMetaHandler().setMaxBackups(value);
+    }
+  }
+
+  async createManualBackup(): Promise<void> {
+    const browserSyncData = this.#storage.getBrowserSyncHandler().browserSyncData;
+    if (browserSyncData) {
+      await this.#storage.getSignerMetaHandler().createBackup(browserSyncData, 'manual');
+      this.loadBackups();
+    }
+  }
+
+  async restoreBackup(backupId: string): Promise<void> {
+    this.restoringBackupId = backupId;
+    try {
+      // First, create a pre-restore backup of current state
+      const currentData = this.#storage.getBrowserSyncHandler().browserSyncData;
+      if (currentData) {
+        await this.#storage.getSignerMetaHandler().createBackup(currentData, 'pre-restore');
+      }
+
+      // Get the backup data
+      const backupData = this.#storage.getSignerMetaHandler().getBackupData(backupId);
+      if (!backupData) {
+        throw new Error('Backup not found');
+      }
+
+      // Import the backup
+      await this.#storage.deleteVault(true);
+      await this.#storage.importVault(backupData);
+      this.#logger.logVaultImport('Backup Restore');
+      this.#storage.isInitialized = false;
+      this.#startup.startOver(getNewStorageServiceConfig());
+    } catch (error) {
+      console.error('Failed to restore backup:', error);
+      this.restoringBackupId = null;
+    }
+  }
+
+  async deleteBackup(backupId: string): Promise<void> {
+    await this.#storage.getSignerMetaHandler().deleteBackup(backupId);
+    this.loadBackups();
+  }
+
+  formatDate(isoDate: string): string {
+    const date = new Date(isoDate);
+    return date.toLocaleDateString() + ' ' + date.toLocaleTimeString();
+  }
+
+  getReasonLabel(reason?: string): string {
+    switch (reason) {
+      case 'auto':
+        return 'Auto';
+      case 'manual':
+        return 'Manual';
+      case 'pre-restore':
+        return 'Pre-Restore';
+      default:
+        return 'Unknown';
+    }
+  }
+
+  getReasonClass(reason?: string): string {
+    switch (reason) {
+      case 'auto':
+        return 'reason-auto';
+      case 'manual':
+        return 'reason-manual';
+      case 'pre-restore':
+        return 'reason-prerestore';
+      default:
+        return '';
+    }
+  }
+
+  goBack(): void {
+    this.#router.navigateByUrl('/home/settings');
+  }
+
+  async onClickLock(): Promise<void> {
+    this.#logger.logVaultLock();
+    await this.#storage.lockVault();
+    this.#router.navigateByUrl('/vault-login');
+  }
+}

projects/firefox/src/app/components/home/identity/identity.component.html

@@ -73,4 +73,12 @@
   </div>
 </div>
 
+<!-- About section -->
+@if (aboutText) {
+  <div class="about-section">
+    <div class="about-header">About</div>
+    <div class="about-content">{{ aboutText }}</div>
+  </div>
+}
+
 <lib-toast #toast></lib-toast>

projects/firefox/src/app/components/home/identity/identity.component.scss

@@ -185,4 +185,33 @@
       opacity: 1;
     }
   }
+
+  .about-section {
+    margin: var(--size);
+    margin-top: 0;
+    flex-shrink: 0;
+    max-height: 150px;
+    display: flex;
+    flex-direction: column;
+
+    .about-header {
+      font-size: 0.85rem;
+      font-weight: 600;
+      color: var(--muted-foreground);
+      margin-bottom: var(--size-h);
+    }
+
+    .about-content {
+      flex: 1;
+      overflow-y: auto;
+      font-size: 0.9rem;
+      line-height: 1.5;
+      color: var(--foreground);
+      background: var(--background-light);
+      border-radius: var(--radius-sm);
+      padding: var(--size);
+      white-space: pre-wrap;
+      word-break: break-word;
+    }
+  }
 }

projects/firefox/src/app/components/home/identity/identity.component.ts

@@ -52,6 +52,10 @@ export class IdentityComponent implements OnInit {
     return this.profile?.banner;
   }
 
+  get aboutText(): string | undefined {
+    return this.profile?.about;
+  }
+
   copyToClipboard(pubkey: string | undefined) {
     if (!pubkey) {
       return;

projects/firefox/src/app/components/home/settings/settings.component.html

@@ -5,7 +5,13 @@
   <span> Settings </span>
 </div>
 
-<span>SYNC: {{ syncFlow }}</span>
+<div class="sync-info">
+  <span class="sync-label">SYNC: {{ syncFlow }}</span>
+  <p class="sync-note">
+    To change sync mode, export your vault, reset the extension,
+    and re-import with the desired sync setting.
+  </p>
+</div>
 
 <button class="btn btn-primary" (click)="onClickExportVault()">
   Export Vault
@@ -15,6 +21,7 @@
   Import Vault
 </button>
 
+<lib-nav-item text="💾 Backups" (click)="navigate('/home/backups')"></lib-nav-item>
 <lib-nav-item text="🪵 Logs" (click)="navigate('/home/logs')"></lib-nav-item>
 <lib-nav-item text="💡 Info" (click)="navigate('/home/info')"></lib-nav-item>
 

projects/firefox/src/app/components/home/settings/settings.component.scss

@@ -15,3 +15,17 @@
     visibility: hidden;
   }
 }
+
+.sync-info {
+  .sync-label {
+    display: block;
+    font-weight: 500;
+  }
+
+  .sync-note {
+    margin: var(--size-h) 0 0 0;
+    font-size: 0.85rem;
+    color: var(--muted-foreground);
+    line-height: 1.4;
+  }
+}

projects/firefox/src/app/components/home/wallet/wallet.component.html

@@ -2,13 +2,652 @@
   <button class="lock-btn" title="Lock" (click)="onClickLock()">
     <span class="emoji">🔒</span>
   </button>
-  <span>Wallet</span>
+  @if (showBackButton) {
+    <button class="back-btn" title="Go Back" (click)="goBack()">
+      <span class="emoji">←</span>
+    </button>
+  }
+  <span>{{ title }}</span>
+  <div class="section-btns">
+    <button
+      class="section-btn"
+      [class.active]="activeSection.startsWith('cashu')"
+      title="Cashu"
+      (click)="setSection('cashu')"
+    >
+      <span class="emoji">🥜</span>
+    </button>
+    <button
+      class="section-btn"
+      [class.active]="activeSection.startsWith('lightning')"
+      title="Lightning"
+      (click)="setSection('lightning')"
+    >
+      <span class="emoji">⚡</span>
+    </button>
+  </div>
 </div>
 
 <div class="wallet-container">
+  <!-- Main wallet menu -->
+  @if (activeSection === 'main') {
+    <div class="wallet-menu">
+      <button class="wallet-menu-item" (click)="setSection('cashu')">
+        <span class="emoji">🥜</span>
+        <span class="label">Cashu</span>
+        <span class="balance">{{ formatCashuBalance(totalCashuBalance) }} sats</span>
+      </button>
+      <button class="wallet-menu-item" (click)="setSection('lightning')">
+        <span class="emoji">⚡</span>
+        <span class="label">Lightning</span>
+        <span class="balance">{{ formatBalance(totalLightningBalance) }} sats</span>
+      </button>
+    </div>
+  }
+
+  <!-- Cashu mint list -->
+  @else if (activeSection === 'cashu') {
+    <div class="lightning-section">
+      @if (mints.length === 0) {
+        <div class="cashu-onboarding">
+          @if (showCashuInfo) {
+            <div class="info-panel">
+              <h3>Welcome to Cashu Wallet</h3>
+
+              <div class="info-section">
+                <h4>Storage Considerations</h4>
+                @if (currentSyncFlow === BrowserSyncFlow.BROWSER_SYNC) {
+                  <div class="warning-box">
+                    <p><strong>Browser Sync is enabled</strong></p>
+                    <p>
+                      Sync storage is limited to ~100KB shared across all your vault data
+                      (identities, permissions, relays, and Cashu tokens). This limits
+                      your Cashu wallet to approximately 300-400 tokens.
+                    </p>
+                    <p>
+                      For larger Cashu holdings, consider disabling browser sync which
+                      provides ~5MB of local storage (~18,000+ tokens).
+                    </p>
+                    <button class="link-btn" (click)="navigateToSettings()">
+                      Change Sync Settings
+                    </button>
+                  </div>
+                } @else {
+                  <div class="success-box">
+                    <p><strong>Local Storage Mode</strong></p>
+                    <p>
+                      You have ~5MB of local storage available, which can hold
+                      thousands of Cashu tokens. Your data stays on this device only.
+                    </p>
+                  </div>
+                }
+              </div>
+
+              <div class="info-section">
+                <h4>Backup Your Wallet</h4>
+                <p>
+                  <strong>Important:</strong> Cashu tokens are bearer assets.
+                  If you lose your vault backup, you lose your tokens permanently.
+                </p>
+                <p>
+                  Vault exports are saved to your browser's downloads folder.
+                  Configure this to point to either:
+                </p>
+                <ul>
+                  <li>Your backup storage device (external drive, NAS)</li>
+                  <li>A folder synced by your backup tool (Syncthing, rsync, etc.)</li>
+                </ul>
+                <p class="browser-url">
+                  <code>{{ browserDownloadSettingsUrl }}</code>
+                </p>
+                <button class="link-btn" (click)="navigateToSettings()">
+                  Go to Backup Settings
+                </button>
+              </div>
+
+              <button class="dismiss-btn" (click)="dismissCashuInfo()">
+                Got it, let me add a mint
+              </button>
+            </div>
+          } @else {
+            <div class="empty-state">
+              <span class="sam-text-muted">No mints connected yet.</span>
+              <button class="show-info-btn" (click)="showCashuInfo = true">
+                Show storage info
+              </button>
+            </div>
+          }
+        </div>
+      } @else {
+        <div class="wallet-list">
+          @for (mint of mints; track mint.id) {
+            <button class="wallet-list-item" (click)="selectMint(mint.id)">
+              <span class="wallet-name">{{ mint.name }}</span>
+              <span class="wallet-balance">{{ formatCashuBalance(mint.cachedBalance) }} sats</span>
+            </button>
+          }
+        </div>
+      }
+      <button class="add-wallet-btn" (click)="showAddMint()">
+        <span class="emoji">+</span>
+        <span>Add Mint</span>
+      </button>
+    </div>
+  }
+
+  <!-- Cashu mint detail -->
+  @else if (activeSection === 'cashu-detail' && selectedMint) {
+    <div class="wallet-detail">
+      <div class="balance-row">
+        <div class="balance-display compact">
+          <span class="balance-value">{{ formatCashuBalance(selectedMintBalance) }}</span>
+          <span class="balance-unit">sats</span>
+        </div>
+        <button
+          class="refresh-icon-btn"
+          (click)="refreshMint()"
+          [disabled]="refreshingMint"
+          title="Refresh"
+        >
+          <span class="emoji" [class.spinning]="refreshingMint">🔄</span>
+        </button>
+      </div>
+      @if (refreshError) {
+        <div class="error-message small">{{ refreshError }}</div>
+      }
+      <div class="action-buttons">
+        <button class="action-btn deposit-btn" (click)="showDeposit()">
+          Deposit
+        </button>
+        <button class="action-btn receive-btn" (click)="showReceive()">
+          Receive
+        </button>
+        <button class="action-btn send-btn" (click)="showSend()" [disabled]="selectedMintBalance === 0">
+          Send
+        </button>
+      </div>
+
+      <!-- Token viewer section -->
+      <div class="token-section">
+        <div class="section-title">Tokens ({{ selectedMintProofs.length }})</div>
+        @if (selectedMintProofs.length === 0) {
+          <div class="empty-text">No tokens stored</div>
+        } @else {
+          <div class="token-list">
+            @for (proof of selectedMintProofs; track proof.secret) {
+              <div class="token-item">
+                <span class="token-amount">{{ proof.amount }}</span>
+                <span class="token-time">{{ formatProofTime(proof.receivedAt) }}</span>
+              </div>
+            }
+          </div>
+        }
+      </div>
+
+      <div class="wallet-info">
+        <div class="info-row">
+          <span class="info-label">Mint URL</span>
+          <span class="info-value">{{ selectedMint.mintUrl }}</span>
+        </div>
+        <div class="info-row">
+          <span class="info-label">Unit</span>
+          <span class="info-value">{{ selectedMint.unit }}</span>
+        </div>
+      </div>
+      <button class="delete-btn" (click)="deleteMint()">
+        Delete Mint
+      </button>
+    </div>
+  }
+
+  <!-- Cashu add mint form -->
+  @else if (activeSection === 'cashu-add') {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="mintName">Mint Name</label>
+        <input
+          id="mintName"
+          type="text"
+          [(ngModel)]="newMintName"
+          placeholder="My Mint"
+          [disabled]="addingMint"
+        />
+      </div>
+      <div class="form-group">
+        <label for="mintUrl">Mint URL</label>
+        <input
+          id="mintUrl"
+          type="text"
+          [(ngModel)]="newMintUrl"
+          placeholder="https://mint.example.com"
+          [disabled]="addingMint"
+        />
+      </div>
+      @if (mintError) {
+        <div class="error-message">{{ mintError }}</div>
+      }
+      @if (mintTestResult) {
+        <div class="success-message">{{ mintTestResult }}</div>
+      }
+      <div class="form-actions">
+        <button
+          class="test-btn"
+          (click)="testMint()"
+          [disabled]="testingMint || addingMint"
+        >
+          {{ testingMint ? 'Testing...' : 'Test Connection' }}
+        </button>
+        <button
+          class="add-btn"
+          (click)="addMint()"
+          [disabled]="addingMint"
+        >
+          {{ addingMint ? 'Adding...' : 'Add Mint' }}
+        </button>
+      </div>
+    </div>
+  }
+
+  <!-- Cashu receive token -->
+  @else if (activeSection === 'cashu-receive') {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="receiveToken">Paste Cashu Token</label>
+        <textarea
+          id="receiveToken"
+          [(ngModel)]="receiveToken"
+          placeholder="cashuB..."
+          rows="5"
+          [disabled]="receivingToken"
+        ></textarea>
+      </div>
+      @if (receiveError) {
+        <div class="error-message">{{ receiveError }}</div>
+      }
+      @if (receiveResult) {
+        <div class="success-message">{{ receiveResult }}</div>
+      }
+      <div class="form-actions">
+        <button
+          class="add-btn full-width"
+          (click)="receiveTokens()"
+          [disabled]="receivingToken"
+        >
+          {{ receivingToken ? 'Receiving...' : 'Receive Tokens' }}
+        </button>
+      </div>
+    </div>
+  }
+
+  <!-- Cashu send token -->
+  @else if (activeSection === 'cashu-send') {
+    <div class="add-wallet-form">
+      <div class="balance-info">
+        Available: {{ formatCashuBalance(selectedMintBalance) }} sats
+      </div>
+      <div class="form-group">
+        <label for="sendAmount">Amount (sats)</label>
+        <input
+          id="sendAmount"
+          type="number"
+          [(ngModel)]="sendAmount"
+          placeholder="0"
+          min="1"
+          [max]="selectedMintBalance"
+          [disabled]="sendingToken"
+        />
+      </div>
+      @if (sendError) {
+        <div class="error-message">{{ sendError }}</div>
+      }
+      @if (sendResult) {
+        <div class="token-result">
+          <span class="token-label">Token to Share</span>
+          <textarea readonly rows="4">{{ sendResult }}</textarea>
+          <button class="copy-btn" (click)="copyToken()">
+            Copy Token
+          </button>
+        </div>
+      }
+      @if (!sendResult) {
+        <div class="form-actions">
+          <button
+            class="add-btn full-width"
+            (click)="sendTokens()"
+            [disabled]="sendingToken || sendAmount <= 0"
+          >
+            {{ sendingToken ? 'Creating...' : 'Create Token' }}
+          </button>
+        </div>
+      }
+    </div>
+  }
+
+  <!-- Cashu deposit (mint via Lightning) -->
+  @else if (activeSection === 'cashu-mint' && selectedMint) {
+    <div class="add-wallet-form">
+      @if (!depositInvoice) {
+        <div class="form-group">
+          <label for="depositAmount">Amount (sats)</label>
+          <input
+            id="depositAmount"
+            type="number"
+            [(ngModel)]="depositAmount"
+            placeholder="1000"
+            min="1"
+            [disabled]="creatingDepositQuote"
+          />
+        </div>
+        @if (depositError) {
+          <div class="error-message">{{ depositError }}</div>
+        }
+        <div class="form-actions">
+          <button
+            class="add-btn full-width"
+            (click)="createDepositInvoice()"
+            [disabled]="creatingDepositQuote || depositAmount <= 0"
+          >
+            {{ creatingDepositQuote ? 'Creating...' : 'Create Invoice' }}
+          </button>
+        </div>
+      }
+      @if (depositInvoice) {
+        <div class="invoice-result">
+          @if (depositInvoiceQr) {
+            <img [src]="depositInvoiceQr" alt="Invoice QR Code" class="qr-code" />
+          }
+          <div class="deposit-status">
+            @if (depositQuoteState === 'UNPAID') {
+              <span class="status-waiting">Waiting for payment...</span>
+              @if (checkingDepositPayment) {
+                <span class="status-checking">checking</span>
+              }
+            } @else if (depositQuoteState === 'PAID') {
+              <span class="status-paid">Payment received! Claiming tokens...</span>
+            } @else if (depositQuoteState === 'ISSUED') {
+              <span class="status-issued">✓ Tokens received!</span>
+            }
+          </div>
+          @if (depositError) {
+            <div class="error-message">{{ depositError }}</div>
+          }
+          @if (depositSuccess) {
+            <div class="success-message">{{ depositSuccess }}</div>
+          }
+          @if (depositQuoteState === 'UNPAID') {
+            <div class="invoice-text">{{ depositInvoice }}</div>
+            <button class="copy-btn" (click)="copyDepositInvoice()">
+              Copy Invoice
+            </button>
+          }
+        </div>
+      }
+    </div>
+  }
+
+  <!-- Lightning wallet list -->
+  @else if (activeSection === 'lightning') {
+    <div class="lightning-section">
+      @if (connections.length === 0) {
         <div class="empty-state">
           <span class="sam-text-muted">
-      Wallet functionality coming soon.
+            No wallets connected yet.
           </span>
         </div>
+      } @else {
+        <div class="wallet-list">
+          @for (conn of connections; track conn.id) {
+            <button class="wallet-list-item" (click)="selectConnection(conn.id)">
+              <span class="wallet-name">{{ conn.name }}</span>
+              <span class="wallet-balance">{{ formatBalance(conn.cachedBalance) }} sats</span>
+            </button>
+          }
+        </div>
+      }
+      <button class="add-wallet-btn" (click)="showAddConnection()">
+        <span class="emoji">+</span>
+        <span>Add NWC Connection</span>
+      </button>
+    </div>
+  }
+
+  <!-- Lightning wallet detail -->
+  @else if (activeSection === 'lightning-detail' && selectedConnection) {
+    <div class="wallet-detail">
+      <div class="balance-row">
+        <div class="balance-display compact">
+          <span class="balance-value">{{ formatBalance(selectedConnection.cachedBalance) }}</span>
+          <span class="balance-unit">sats</span>
+        </div>
+        <button class="refresh-icon-btn" (click)="refreshWallet()" title="Refresh">
+          <span class="emoji">🔄</span>
+        </button>
+      </div>
+
+      <div class="action-buttons">
+        <button class="action-btn receive-btn" (click)="showLnReceive()">
+          Receive
+        </button>
+        <button class="action-btn send-btn" (click)="showLnPay()">
+          Pay
+        </button>
+      </div>
+
+      <div class="wallet-info">
+        <div class="info-row">
+          <span class="info-label">Relay</span>
+          <span class="info-value">{{ selectedConnection.relayUrl }}</span>
+        </div>
+        @if (selectedConnection.lud16) {
+          <button class="info-row-btn" (click)="copyLightningAddress()">
+            <span class="info-label">Lightning Address</span>
+            <span class="info-value">
+              {{ selectedConnection.lud16 }}
+              <span class="copy-hint">{{ addressCopied ? '✓ Copied' : '(tap to copy)' }}</span>
+            </span>
+          </button>
+        }
+      </div>
+
+      <!-- Transaction History -->
+      <div class="transaction-section">
+        <div class="section-title">Transactions</div>
+        @if (loadingTransactions) {
+          <div class="loading-text">Loading...</div>
+        } @else if (transactionsNotSupported) {
+          <div class="not-supported-text">Transaction history not supported by this wallet</div>
+        } @else if (transactionsError) {
+          <div class="error-text">{{ transactionsError }}</div>
+        } @else if (transactions.length === 0) {
+          <div class="empty-text">No transactions yet</div>
+        } @else {
+          <div class="transaction-list">
+            @for (tx of transactions; track tx.payment_hash) {
+              <div class="transaction-item" [class.incoming]="tx.type === 'incoming'" [class.outgoing]="tx.type === 'outgoing'">
+                <span class="tx-icon">{{ tx.type === 'incoming' ? '⬇' : '⬆' }}</span>
+                <span class="tx-type">{{ tx.type === 'incoming' ? 'Received' : 'Sent' }}</span>
+                <span class="tx-amount">{{ formatBalance(tx.amount) }}</span>
+                <span class="tx-time">{{ formatTransactionTime(tx.created_at) }}</span>
+              </div>
+            }
+          </div>
+        }
+      </div>
+
+      <button class="delete-btn-small" (click)="deleteConnection()">
+        Delete Wallet
+      </button>
+    </div>
+  }
+
+  <!-- Lightning receive invoice -->
+  @else if (activeSection === 'lightning-receive' && selectedConnection) {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="lnReceiveAmount">Amount (sats)</label>
+        <input
+          id="lnReceiveAmount"
+          type="number"
+          [(ngModel)]="lnReceiveAmount"
+          placeholder="1000"
+          min="1"
+          [disabled]="generatingInvoice"
+        />
+      </div>
+      <div class="form-group">
+        <label for="lnReceiveDescription">Description (optional)</label>
+        <input
+          id="lnReceiveDescription"
+          type="text"
+          [(ngModel)]="lnReceiveDescription"
+          placeholder="Payment for..."
+          [disabled]="generatingInvoice"
+        />
+      </div>
+      @if (lnReceiveError) {
+        <div class="error-message">{{ lnReceiveError }}</div>
+      }
+      @if (!generatedInvoice) {
+        <div class="form-actions">
+          <button
+            class="add-btn full-width"
+            (click)="createReceiveInvoice()"
+            [disabled]="generatingInvoice || lnReceiveAmount <= 0"
+          >
+            {{ generatingInvoice ? 'Generating...' : 'Generate Invoice' }}
+          </button>
+        </div>
+      }
+      @if (generatedInvoice) {
+        <div class="invoice-result">
+          @if (generatedInvoiceQr) {
+            <img [src]="generatedInvoiceQr" alt="Invoice QR Code" class="qr-code" />
+          }
+          <div class="invoice-text">{{ generatedInvoice }}</div>
+          <button class="copy-btn" (click)="copyInvoice()">
+            {{ invoiceCopied ? 'Copied!' : 'Copy Invoice' }}
+          </button>
+        </div>
+      }
+    </div>
+  }
+
+  <!-- Pay Modal Overlay -->
+  @if (showPayModal && selectedConnection) {
+    <div class="modal-overlay" role="dialog" aria-modal="true" tabindex="-1" (click)="closePayModal()" (keydown.escape)="closePayModal()">
+      <div class="modal-content" role="document" (click)="$event.stopPropagation()" (keydown)="$event.stopPropagation()">
+        <div class="modal-header">
+          <span>Pay Invoice</span>
+          <button class="modal-close" (click)="closePayModal()">×</button>
+        </div>
+        <div class="modal-body">
+          <div class="form-group">
+            <label for="payInput">Lightning Address or Invoice</label>
+            <textarea
+              id="payInput"
+              [(ngModel)]="payInput"
+              placeholder="user@domain.com or lnbc1..."
+              rows="3"
+              [disabled]="paying"
+            ></textarea>
+          </div>
+          <div class="form-group">
+            <label for="payAmount">Amount (sats) - required for addresses</label>
+            <input
+              id="payAmount"
+              type="number"
+              [(ngModel)]="payAmount"
+              placeholder="Optional for invoices"
+              min="1"
+              [disabled]="paying"
+            />
+          </div>
+          @if (paymentError) {
+            <div class="error-message">{{ paymentError }}</div>
+          }
+          @if (paymentSuccess) {
+            <div class="success-message payment-success">Payment Successful!</div>
+          }
+          @if (!paymentSuccess) {
+            <div class="form-actions">
+              <button class="test-btn" (click)="closePayModal()" [disabled]="paying">
+                Cancel
+              </button>
+              <button
+                class="add-btn"
+                (click)="payInvoiceOrAddress()"
+                [disabled]="paying || !payInput.trim()"
+              >
+                {{ paying ? 'Paying...' : 'Pay' }}
+              </button>
+            </div>
+          }
+        </div>
+      </div>
+    </div>
+  }
+
+  <!-- Add wallet form -->
+  @else if (activeSection === 'lightning-add') {
+    <div class="add-wallet-form">
+      <div class="form-group">
+        <label for="walletName">Wallet Name</label>
+        <input
+          id="walletName"
+          type="text"
+          [(ngModel)]="newWalletName"
+          placeholder="My Lightning Wallet"
+          [disabled]="addingConnection"
+        />
+      </div>
+      <div class="form-group">
+        <label for="walletUrl">NWC Connection URL</label>
+        <textarea
+          id="walletUrl"
+          [(ngModel)]="newWalletUrl"
+          placeholder="nostr+walletconnect://..."
+          rows="3"
+          [disabled]="addingConnection"
+        ></textarea>
+      </div>
+      @if (connectionError) {
+        <div class="error-message">{{ connectionError }}</div>
+      }
+      @if (connectionTestResult) {
+        <div class="success-message">{{ connectionTestResult }}</div>
+      }
+      @if (nwcService.logs.length > 0) {
+        <div class="nwc-log">
+          <div class="log-header">
+            <span>Connection Log</span>
+            <button class="log-clear-btn" (click)="nwcService.clearLogs()">Clear</button>
+          </div>
+          <div class="log-entries">
+            @for (entry of nwcService.logs; track entry.timestamp) {
+              <div class="log-entry" [class.log-warn]="entry.level === 'warn'" [class.log-error]="entry.level === 'error'">
+                <span class="log-time">{{ entry.timestamp | date:'HH:mm:ss' }}</span>
+                <span class="log-message">{{ entry.message }}</span>
+              </div>
+            }
+          </div>
+        </div>
+      }
+      <div class="form-actions">
+        <button
+          class="test-btn"
+          (click)="testConnection()"
+          [disabled]="testingConnection || addingConnection"
+        >
+          {{ testingConnection ? 'Testing...' : 'Test Connection' }}
+        </button>
+        <button
+          class="add-btn"
+          (click)="addConnection()"
+          [disabled]="addingConnection"
+        >
+          {{ addingConnection ? 'Adding...' : 'Add Wallet' }}
+        </button>
+      </div>
+    </div>
+  }
 </div>

projects/firefox/src/app/components/home/wallet/wallet.component.ts

@@ -1,21 +1,952 @@
-import { Component, inject } from '@angular/core';
+import { Component, inject, OnInit, OnDestroy } from '@angular/core';
 import { Router } from '@angular/router';
-import { LoggerService, StorageService } from '@common';
+import { FormsModule } from '@angular/forms';
+import { CommonModule } from '@angular/common';
+import {
+  LoggerService,
+  StorageService,
+  NwcService,
+  NwcConnection_DECRYPTED,
+  CashuService,
+  CashuMint_DECRYPTED,
+  CashuProof,
+  NwcLookupInvoiceResult,
+  BrowserSyncFlow,
+} from '@common';
+import * as QRCode from 'qrcode';
+
+type WalletSection =
+  | 'main'
+  | 'cashu'
+  | 'cashu-detail'
+  | 'cashu-add'
+  | 'cashu-receive'
+  | 'cashu-send'
+  | 'cashu-mint'
+  | 'lightning'
+  | 'lightning-detail'
+  | 'lightning-add'
+  | 'lightning-receive'
+  | 'lightning-pay';
 
 @Component({
   selector: 'app-wallet',
   templateUrl: './wallet.component.html',
   styleUrl: './wallet.component.scss',
-  imports: [],
+  imports: [CommonModule, FormsModule],
 })
-export class WalletComponent {
+export class WalletComponent implements OnInit, OnDestroy {
   readonly #logger = inject(LoggerService);
   readonly #storage = inject(StorageService);
   readonly #router = inject(Router);
+  readonly nwcService = inject(NwcService);
+  readonly cashuService = inject(CashuService);
+
+  activeSection: WalletSection = 'main';
+  selectedConnectionId: string | null = null;
+  selectedMintId: string | null = null;
+
+  // Form fields for adding new NWC connection
+  newWalletName = '';
+  newWalletUrl = '';
+  addingConnection = false;
+  testingConnection = false;
+  connectionError = '';
+  connectionTestResult = '';
+
+  // Form fields for adding new Cashu mint
+  newMintName = '';
+  newMintUrl = '';
+  addingMint = false;
+  testingMint = false;
+  mintError = '';
+  mintTestResult = '';
+
+  // Cashu receive/send fields
+  receiveToken = '';
+  receivingToken = false;
+  receiveError = '';
+  receiveResult = '';
+  sendAmount = 0;
+  sendingToken = false;
+  sendError = '';
+  sendResult = '';
+
+  // Cashu mint (deposit) fields
+  depositAmount = 0;
+  creatingDepositQuote = false;
+  depositQuoteId = '';
+  depositInvoice = '';
+  depositInvoiceQr = '';
+  depositError = '';
+  depositSuccess = '';
+  checkingDepositPayment = false;
+  depositQuoteState: 'UNPAID' | 'PAID' | 'ISSUED' = 'UNPAID';
+  private depositPollingInterval: ReturnType<typeof setInterval> | null = null;
+
+  // Loading states
+  loadingBalances = false;
+  balanceError = '';
+
+  // Lightning transaction history
+  transactions: NwcLookupInvoiceResult[] = [];
+  loadingTransactions = false;
+  transactionsError = '';
+  transactionsNotSupported = false;
+
+  // Lightning receive
+  lnReceiveAmount = 0;
+  lnReceiveDescription = '';
+  generatingInvoice = false;
+  generatedInvoice = '';
+  generatedInvoiceQr = '';
+  lnReceiveError = '';
+  invoiceCopied = false;
+
+  // Lightning pay
+  showPayModal = false;
+  payInput = '';
+  payAmount = 0;
+  paying = false;
+  paymentSuccess = false;
+  paymentError = '';
+
+  // Clipboard feedback
+  addressCopied = false;
+
+  // Cashu onboarding info
+  showCashuInfo = true;
+  currentSyncFlow: BrowserSyncFlow = BrowserSyncFlow.NO_SYNC;
+  readonly BrowserSyncFlow = BrowserSyncFlow; // Expose enum to template
+  readonly browserDownloadSettingsUrl = 'about:preferences#general';
+
+  // Cashu mint refresh
+  refreshingMint = false;
+  refreshError = '';
+
+  get title(): string {
+    switch (this.activeSection) {
+      case 'cashu':
+        return 'Cashu';
+      case 'cashu-detail':
+        return this.selectedMint?.name ?? 'Mint';
+      case 'cashu-add':
+        return 'Add Mint';
+      case 'cashu-receive':
+        return 'Receive';
+      case 'cashu-send':
+        return 'Send';
+      case 'cashu-mint':
+        return 'Deposit';
+      case 'lightning':
+        return 'Lightning';
+      case 'lightning-detail':
+        return this.selectedConnection?.name ?? 'Wallet';
+      case 'lightning-add':
+        return 'Add Wallet';
+      case 'lightning-receive':
+        return 'Receive';
+      case 'lightning-pay':
+        return 'Pay';
+      default:
+        return 'Wallet';
+    }
+  }
+
+  get showBackButton(): boolean {
+    return this.activeSection !== 'main';
+  }
+
+  get connections(): NwcConnection_DECRYPTED[] {
+    return this.nwcService.getConnections();
+  }
+
+  get selectedConnection(): NwcConnection_DECRYPTED | undefined {
+    if (!this.selectedConnectionId) return undefined;
+    return this.nwcService.getConnection(this.selectedConnectionId);
+  }
+
+  get totalLightningBalance(): number {
+    return this.nwcService.getCachedTotalBalance();
+  }
+
+  get mints(): CashuMint_DECRYPTED[] {
+    return this.cashuService.getMints();
+  }
+
+  get selectedMint(): CashuMint_DECRYPTED | undefined {
+    if (!this.selectedMintId) return undefined;
+    return this.cashuService.getMint(this.selectedMintId);
+  }
+
+  get totalCashuBalance(): number {
+    return this.cashuService.getCachedTotalBalance();
+  }
+
+  get selectedMintBalance(): number {
+    if (!this.selectedMintId) return 0;
+    return this.cashuService.getBalance(this.selectedMintId);
+  }
+
+  get selectedMintProofs(): CashuProof[] {
+    if (!this.selectedMintId) return [];
+    return this.cashuService.getProofs(this.selectedMintId);
+  }
+
+  ngOnInit(): void {
+    // Load current sync flow setting
+    this.currentSyncFlow = this.#storage.getSyncFlow();
+
+    // Refresh balances on init if we have connections
+    if (this.connections.length > 0) {
+      this.refreshAllBalances();
+    }
+  }
+
+  ngOnDestroy(): void {
+    this.nwcService.disconnectAll();
+    this.stopDepositPolling();
+  }
+
+  setSection(section: WalletSection) {
+    this.activeSection = section;
+    this.connectionError = '';
+    this.connectionTestResult = '';
+  }
+
+  goBack() {
+    switch (this.activeSection) {
+      case 'lightning-detail':
+      case 'lightning-add':
+        this.activeSection = 'lightning';
+        this.selectedConnectionId = null;
+        this.resetAddForm();
+        this.resetLightningForms();
+        break;
+      case 'lightning-receive':
+      case 'lightning-pay':
+        this.activeSection = 'lightning-detail';
+        this.resetLightningForms();
+        break;
+      case 'cashu-detail':
+      case 'cashu-add':
+        this.activeSection = 'cashu';
+        this.selectedMintId = null;
+        this.resetAddMintForm();
+        break;
+      case 'cashu-receive':
+      case 'cashu-send':
+      case 'cashu-mint':
+        this.activeSection = 'cashu-detail';
+        this.resetReceiveSendForm();
+        this.resetDepositForm();
+        break;
+      case 'lightning':
+      case 'cashu':
+        this.activeSection = 'main';
+        break;
+    }
+  }
+
+  selectConnection(connectionId: string) {
+    this.selectedConnectionId = connectionId;
+    this.activeSection = 'lightning-detail';
+    this.loadTransactions(connectionId);
+  }
+
+  private resetLightningForms() {
+    this.lnReceiveAmount = 0;
+    this.lnReceiveDescription = '';
+    this.generatingInvoice = false;
+    this.generatedInvoice = '';
+    this.generatedInvoiceQr = '';
+    this.lnReceiveError = '';
+    this.invoiceCopied = false;
+    this.payInput = '';
+    this.payAmount = 0;
+    this.paying = false;
+    this.paymentSuccess = false;
+    this.paymentError = '';
+    this.showPayModal = false;
+  }
+
+  showAddConnection() {
+    this.resetAddForm();
+    this.activeSection = 'lightning-add';
+  }
+
+  private resetAddForm() {
+    this.newWalletName = '';
+    this.newWalletUrl = '';
+    this.connectionError = '';
+    this.connectionTestResult = '';
+    this.addingConnection = false;
+    this.testingConnection = false;
+  }
+
+  async testConnection() {
+    if (!this.newWalletUrl.trim()) {
+      this.connectionError = 'Please enter an NWC URL';
+      return;
+    }
+
+    this.testingConnection = true;
+    this.connectionError = '';
+    this.connectionTestResult = '';
+    this.nwcService.clearLogs();
+
+    try {
+      const info = await this.nwcService.testConnection(this.newWalletUrl);
+      this.connectionTestResult = `Connected! ${info.alias ? 'Wallet: ' + info.alias : ''}`;
+      // Hide logs on success
+      this.nwcService.clearLogs();
+    } catch (error) {
+      this.connectionError =
+        error instanceof Error ? error.message : 'Connection test failed';
+      // Keep logs visible on failure for debugging
+    } finally {
+      this.testingConnection = false;
+    }
+  }
+
+  async addConnection() {
+    if (!this.newWalletName.trim()) {
+      this.connectionError = 'Please enter a wallet name';
+      return;
+    }
+    if (!this.newWalletUrl.trim()) {
+      this.connectionError = 'Please enter an NWC URL';
+      return;
+    }
+
+    this.addingConnection = true;
+    this.connectionError = '';
+
+    try {
+      await this.nwcService.addConnection(
+        this.newWalletName.trim(),
+        this.newWalletUrl.trim()
+      );
+
+      // Refresh the balance for the new connection
+      const connections = this.nwcService.getConnections();
+      const newConnection = connections[connections.length - 1];
+      if (newConnection) {
+        try {
+          await this.nwcService.getBalance(newConnection.id);
+        } catch {
+          // Ignore balance fetch error
+        }
+      }
+
+      this.goBack();
+    } catch (error) {
+      this.connectionError =
+        error instanceof Error ? error.message : 'Failed to add connection';
+    } finally {
+      this.addingConnection = false;
+    }
+  }
+
+  async deleteConnection() {
+    if (!this.selectedConnectionId) return;
+
+    const connection = this.selectedConnection;
+    if (
+      !confirm(`Delete wallet "${connection?.name}"? This cannot be undone.`)
+    ) {
+      return;
+    }
+
+    try {
+      await this.nwcService.deleteConnection(this.selectedConnectionId);
+      this.goBack();
+    } catch (error) {
+      console.error('Failed to delete connection:', error);
+    }
+  }
+
+  // Cashu methods
+
+  selectMint(mintId: string) {
+    this.selectedMintId = mintId;
+    this.activeSection = 'cashu-detail';
+    // Auto-refresh to check for spent proofs
+    this.refreshMint();
+  }
+
+  async refreshMint() {
+    if (!this.selectedMintId || this.refreshingMint) return;
+
+    this.refreshingMint = true;
+    this.refreshError = '';
+
+    try {
+      const removedAmount = await this.cashuService.checkProofsSpent(this.selectedMintId);
+      if (removedAmount > 0) {
+        // Balance was updated, proofs were spent
+        console.log(`Removed ${removedAmount} sats of spent proofs`);
+      }
+    } catch (error) {
+      this.refreshError = error instanceof Error ? error.message : 'Failed to refresh';
+      console.error('Failed to refresh mint:', error);
+    } finally {
+      this.refreshingMint = false;
+    }
+  }
+
+  showAddMint() {
+    this.resetAddMintForm();
+    this.activeSection = 'cashu-add';
+  }
+
+  showReceive() {
+    this.resetReceiveSendForm();
+    this.activeSection = 'cashu-receive';
+  }
+
+  showSend() {
+    this.resetReceiveSendForm();
+    this.activeSection = 'cashu-send';
+  }
+
+  private resetAddMintForm() {
+    this.newMintName = '';
+    this.newMintUrl = '';
+    this.mintError = '';
+    this.mintTestResult = '';
+    this.addingMint = false;
+    this.testingMint = false;
+  }
+
+  private resetReceiveSendForm() {
+    this.receiveToken = '';
+    this.receivingToken = false;
+    this.receiveError = '';
+    this.receiveResult = '';
+    this.sendAmount = 0;
+    this.sendingToken = false;
+    this.sendError = '';
+    this.sendResult = '';
+  }
+
+  private resetDepositForm() {
+    this.depositAmount = 0;
+    this.creatingDepositQuote = false;
+    this.depositQuoteId = '';
+    this.depositInvoice = '';
+    this.depositInvoiceQr = '';
+    this.depositError = '';
+    this.depositSuccess = '';
+    this.checkingDepositPayment = false;
+    this.depositQuoteState = 'UNPAID';
+    this.stopDepositPolling();
+  }
+
+  private stopDepositPolling() {
+    if (this.depositPollingInterval) {
+      clearInterval(this.depositPollingInterval);
+      this.depositPollingInterval = null;
+    }
+  }
+
+  async testMint() {
+    if (!this.newMintUrl.trim()) {
+      this.mintError = 'Please enter a mint URL';
+      return;
+    }
+
+    this.testingMint = true;
+    this.mintError = '';
+    this.mintTestResult = '';
+
+    try {
+      const info = await this.cashuService.testMintConnection(
+        this.newMintUrl.trim()
+      );
+      this.mintTestResult = `Connected! ${info.name ? 'Mint: ' + info.name : ''}`;
+    } catch (error) {
+      this.mintError =
+        error instanceof Error ? error.message : 'Connection test failed';
+    } finally {
+      this.testingMint = false;
+    }
+  }
+
+  async addMint() {
+    if (!this.newMintName.trim()) {
+      this.mintError = 'Please enter a mint name';
+      return;
+    }
+    if (!this.newMintUrl.trim()) {
+      this.mintError = 'Please enter a mint URL';
+      return;
+    }
+
+    this.addingMint = true;
+    this.mintError = '';
+
+    try {
+      await this.cashuService.addMint(
+        this.newMintName.trim(),
+        this.newMintUrl.trim()
+      );
+      this.goBack();
+    } catch (error) {
+      this.mintError =
+        error instanceof Error ? error.message : 'Failed to add mint';
+    } finally {
+      this.addingMint = false;
+    }
+  }
+
+  async deleteMint() {
+    if (!this.selectedMintId) return;
+
+    const mint = this.selectedMint;
+    if (!confirm(`Delete mint "${mint?.name}"? Any tokens stored will be lost. This cannot be undone.`)) {
+      return;
+    }
+
+    try {
+      await this.cashuService.deleteMint(this.selectedMintId);
+      this.goBack();
+    } catch (error) {
+      console.error('Failed to delete mint:', error);
+    }
+  }
+
+  async receiveTokens() {
+    if (!this.receiveToken.trim()) {
+      this.receiveError = 'Please paste a Cashu token';
+      return;
+    }
+
+    this.receivingToken = true;
+    this.receiveError = '';
+    this.receiveResult = '';
+
+    try {
+      const result = await this.cashuService.receive(this.receiveToken.trim());
+      this.receiveResult = `Received ${result.amount} sats!`;
+      this.receiveToken = '';
+    } catch (error) {
+      this.receiveError =
+        error instanceof Error ? error.message : 'Failed to receive token';
+    } finally {
+      this.receivingToken = false;
+    }
+  }
+
+  async sendTokens() {
+    if (!this.selectedMintId) return;
+
+    if (this.sendAmount <= 0) {
+      this.sendError = 'Please enter a valid amount';
+      return;
+    }
+
+    const balance = this.selectedMintBalance;
+    if (this.sendAmount > balance) {
+      this.sendError = `Insufficient balance. You have ${balance} sats`;
+      return;
+    }
+
+    this.sendingToken = true;
+    this.sendError = '';
+    this.sendResult = '';
+
+    try {
+      const result = await this.cashuService.send(
+        this.selectedMintId,
+        this.sendAmount
+      );
+      this.sendResult = result.token;
+      this.sendAmount = 0;
+    } catch (error) {
+      this.sendError =
+        error instanceof Error ? error.message : 'Failed to create token';
+    } finally {
+      this.sendingToken = false;
+    }
+  }
+
+  copyToken() {
+    if (this.sendResult) {
+      navigator.clipboard.writeText(this.sendResult);
+    }
+  }
+
+  async checkProofs() {
+    if (!this.selectedMintId) return;
+
+    try {
+      const removedAmount = await this.cashuService.checkProofsSpent(
+        this.selectedMintId
+      );
+      if (removedAmount > 0) {
+        alert(`Removed ${removedAmount} sats of spent proofs.`);
+      } else {
+        alert('All proofs are valid.');
+      }
+    } catch (error) {
+      console.error('Failed to check proofs:', error);
+    }
+  }
+
+  // Cashu deposit (mint) methods
+
+  showDeposit() {
+    this.resetDepositForm();
+    this.activeSection = 'cashu-mint';
+  }
+
+  async createDepositInvoice() {
+    if (!this.selectedMintId) return;
+
+    if (this.depositAmount <= 0) {
+      this.depositError = 'Please enter an amount';
+      return;
+    }
+
+    this.creatingDepositQuote = true;
+    this.depositError = '';
+    this.depositInvoice = '';
+    this.depositInvoiceQr = '';
+
+    try {
+      const quote = await this.cashuService.createMintQuote(
+        this.selectedMintId,
+        this.depositAmount
+      );
+
+      this.depositQuoteId = quote.quoteId;
+      this.depositInvoice = quote.invoice;
+      this.depositQuoteState = quote.state;
+
+      // Generate QR code
+      this.depositInvoiceQr = await QRCode.toDataURL(quote.invoice, {
+        width: 200,
+        margin: 2,
+        color: {
+          dark: '#000000',
+          light: '#ffffff',
+        },
+      });
+
+      // Start polling for payment
+      this.startDepositPolling();
+    } catch (error) {
+      this.depositError =
+        error instanceof Error ? error.message : 'Failed to create invoice';
+    } finally {
+      this.creatingDepositQuote = false;
+    }
+  }
+
+  private startDepositPolling() {
+    // Poll every 3 seconds for payment confirmation
+    this.depositPollingInterval = setInterval(async () => {
+      await this.checkDepositPayment();
+    }, 3000);
+  }
+
+  async checkDepositPayment() {
+    if (!this.selectedMintId || !this.depositQuoteId) return;
+
+    this.checkingDepositPayment = true;
+
+    try {
+      const quote = await this.cashuService.checkMintQuote(
+        this.selectedMintId,
+        this.depositQuoteId
+      );
+
+      this.depositQuoteState = quote.state;
+
+      if (quote.state === 'PAID') {
+        // Invoice is paid, claim the tokens
+        this.stopDepositPolling();
+        await this.claimDepositTokens();
+      } else if (quote.state === 'ISSUED') {
+        // Already claimed
+        this.stopDepositPolling();
+        this.depositSuccess = 'Tokens already claimed!';
+      }
+    } catch (error) {
+      // Don't show error for polling failures, just log
+      console.error('Failed to check payment:', error);
+    } finally {
+      this.checkingDepositPayment = false;
+    }
+  }
+
+  async claimDepositTokens() {
+    if (!this.selectedMintId || !this.depositQuoteId) return;
+
+    try {
+      const result = await this.cashuService.mintTokens(
+        this.selectedMintId,
+        this.depositAmount,
+        this.depositQuoteId
+      );
+
+      this.depositSuccess = `Received ${result.amount} sats!`;
+      this.depositQuoteState = 'ISSUED';
+    } catch (error) {
+      this.depositError =
+        error instanceof Error ? error.message : 'Failed to claim tokens';
+    }
+  }
+
+  async copyDepositInvoice() {
+    if (this.depositInvoice) {
+      await navigator.clipboard.writeText(this.depositInvoice);
+    }
+  }
+
+  formatCashuBalance(sats: number | undefined): string {
+    return this.cashuService.formatBalance(sats);
+  }
+
+  async refreshBalance(connectionId: string) {
+    try {
+      await this.nwcService.getBalance(connectionId);
+    } catch (error) {
+      console.error('Failed to refresh balance:', error);
+    }
+  }
+
+  async refreshAllBalances() {
+    this.loadingBalances = true;
+    this.balanceError = '';
+
+    try {
+      await this.nwcService.getAllBalances();
+    } catch {
+      this.balanceError = 'Failed to refresh some balances';
+    } finally {
+      this.loadingBalances = false;
+    }
+  }
+
+  formatBalance(millisats: number | undefined): string {
+    if (millisats === undefined) return '—';
+    // Convert millisats to sats with 3 decimal places
+    const sats = millisats / 1000;
+    return sats.toLocaleString('en-US', {
+      minimumFractionDigits: 0,
+      maximumFractionDigits: 3,
+    });
+  }
+
+  // Lightning transaction methods
+
+  async loadTransactions(connectionId: string) {
+    this.loadingTransactions = true;
+    this.transactionsError = '';
+    this.transactionsNotSupported = false;
+
+    try {
+      this.transactions = await this.nwcService.listTransactions(connectionId, {
+        limit: 20,
+      });
+    } catch (error) {
+      const errorMsg = error instanceof Error ? error.message : 'Unknown error';
+      if (errorMsg.includes('NOT_IMPLEMENTED') || errorMsg.includes('not supported')) {
+        this.transactionsNotSupported = true;
+      } else {
+        this.transactionsError = errorMsg;
+      }
+      this.transactions = [];
+    } finally {
+      this.loadingTransactions = false;
+    }
+  }
+
+  async refreshWallet() {
+    if (!this.selectedConnectionId) return;
+
+    // Refresh balance and transactions in parallel
+    await Promise.all([
+      this.refreshBalance(this.selectedConnectionId),
+      this.loadTransactions(this.selectedConnectionId),
+    ]);
+  }
+
+  showLnReceive() {
+    this.resetLightningForms();
+    this.activeSection = 'lightning-receive';
+  }
+
+  showLnPay() {
+    this.resetLightningForms();
+    this.showPayModal = true;
+  }
+
+  closePayModal() {
+    this.showPayModal = false;
+    this.resetLightningForms();
+  }
+
+  async createReceiveInvoice() {
+    if (!this.selectedConnectionId) return;
+
+    if (this.lnReceiveAmount <= 0) {
+      this.lnReceiveError = 'Please enter an amount';
+      return;
+    }
+
+    this.generatingInvoice = true;
+    this.lnReceiveError = '';
+    this.generatedInvoice = '';
+    this.generatedInvoiceQr = '';
+
+    try {
+      const result = await this.nwcService.makeInvoice(
+        this.selectedConnectionId,
+        this.lnReceiveAmount * 1000, // Convert sats to millisats
+        this.lnReceiveDescription || undefined
+      );
+      this.generatedInvoice = result.invoice;
+
+      // Generate QR code
+      this.generatedInvoiceQr = await QRCode.toDataURL(result.invoice, {
+        width: 200,
+        margin: 2,
+        color: {
+          dark: '#000000',
+          light: '#ffffff',
+        },
+      });
+    } catch (error) {
+      this.lnReceiveError =
+        error instanceof Error ? error.message : 'Failed to create invoice';
+    } finally {
+      this.generatingInvoice = false;
+    }
+  }
+
+  async copyInvoice() {
+    if (this.generatedInvoice) {
+      await navigator.clipboard.writeText(this.generatedInvoice);
+      this.invoiceCopied = true;
+      setTimeout(() => (this.invoiceCopied = false), 2000);
+    }
+  }
+
+  async copyLightningAddress() {
+    const lud16 = this.selectedConnection?.lud16;
+    if (lud16) {
+      await navigator.clipboard.writeText(lud16);
+      this.addressCopied = true;
+      setTimeout(() => (this.addressCopied = false), 2000);
+    }
+  }
+
+  async payInvoiceOrAddress() {
+    if (!this.selectedConnectionId || !this.payInput.trim()) {
+      this.paymentError = 'Please enter a lightning address or invoice';
+      return;
+    }
+
+    this.paying = true;
+    this.paymentError = '';
+    this.paymentSuccess = false;
+
+    try {
+      let invoice = this.payInput.trim();
+
+      // Check if it's a lightning address
+      if (this.nwcService.isLightningAddress(invoice)) {
+        if (this.payAmount <= 0) {
+          this.paymentError = 'Please enter an amount for lightning address payments';
+          this.paying = false;
+          return;
+        }
+        // Resolve lightning address to invoice
+        invoice = await this.nwcService.resolveLightningAddress(
+          invoice,
+          this.payAmount * 1000 // Convert sats to millisats
+        );
+      }
+
+      // Pay the invoice
+      await this.nwcService.payInvoice(
+        this.selectedConnectionId,
+        invoice,
+        this.payAmount > 0 ? this.payAmount * 1000 : undefined
+      );
+
+      this.paymentSuccess = true;
+
+      // Refresh balance and transactions after payment
+      await this.refreshWallet();
+
+      // Close modal after a delay
+      setTimeout(() => {
+        this.closePayModal();
+      }, 2000);
+    } catch (error) {
+      this.paymentError =
+        error instanceof Error ? error.message : 'Payment failed';
+    } finally {
+      this.paying = false;
+    }
+  }
+
+  formatTransactionTime(timestamp: number): string {
+    const date = new Date(timestamp * 1000);
+    const now = new Date();
+    const isToday = date.toDateString() === now.toDateString();
+
+    if (isToday) {
+      return date.toLocaleTimeString('en-US', {
+        hour: '2-digit',
+        minute: '2-digit',
+      });
+    }
+
+    return date.toLocaleDateString('en-US', {
+      month: 'short',
+      day: 'numeric',
+    });
+  }
+
+  formatProofTime(isoTimestamp: string | undefined): string {
+    if (!isoTimestamp) return '—';
+
+    const date = new Date(isoTimestamp);
+    const now = new Date();
+    const isToday = date.toDateString() === now.toDateString();
+
+    if (isToday) {
+      return date.toLocaleTimeString('en-US', {
+        hour: '2-digit',
+        minute: '2-digit',
+      });
+    }
+
+    return date.toLocaleDateString('en-US', {
+      month: 'short',
+      day: 'numeric',
+      hour: '2-digit',
+      minute: '2-digit',
+    });
+  }
 
   async onClickLock() {
     this.#logger.logVaultLock();
     await this.#storage.lockVault();
     this.#router.navigateByUrl('/vault-login');
   }
+
+  // Cashu onboarding methods
+  dismissCashuInfo() {
+    this.showCashuInfo = false;
+  }
+
+  navigateToSettings() {
+    this.#router.navigateByUrl('/home/settings');
+  }
 }

projects/firefox/src/app/components/welcome/welcome.component.html

@@ -37,6 +37,26 @@
   <span> Sync OFF</span>
 </button>
 
+<div class="storage-info">
+  <details>
+    <summary>Important for Cashu wallet users</summary>
+    <p>
+      Browser sync storage is limited to ~100KB shared across all data
+      (identities, permissions, relays, and Cashu tokens).
+    </p>
+    <p>
+      If you plan to use the Cashu ecash wallet with significant balances,
+      choose <strong>"Sync OFF"</strong> which provides ~5MB of local storage
+      (enough for ~18,000+ tokens vs ~300-400 with sync).
+    </p>
+    <p>
+      <strong>Note:</strong> Cashu tokens are bearer assets. If you lose your
+      vault backup, you lose your tokens permanently. Make sure to configure
+      regular backups.
+    </p>
+  </details>
+</div>
+
 <div class="sam-flex-grow"></div>
 
 <span class="sam-text-muted sam-text-md sam-mb">

projects/firefox/src/app/components/welcome/welcome.component.scss

@@ -6,3 +6,41 @@
   padding-left: var(--size);
   padding-right: var(--size);
 }
+
+.storage-info {
+  margin-top: 1rem;
+  width: 100%;
+
+  details {
+    background: rgba(255, 193, 7, 0.1);
+    border: 1px solid var(--warning, #ffc107);
+    border-radius: 6px;
+    padding: 0.5rem;
+
+    summary {
+      cursor: pointer;
+      font-weight: 500;
+      font-size: 0.9rem;
+      color: var(--warning, #ffc107);
+
+      &:hover {
+        text-decoration: underline;
+      }
+    }
+
+    p {
+      margin: 0.75rem 0 0 0;
+      font-size: 0.85rem;
+      line-height: 1.4;
+      color: var(--text-muted, #6c757d);
+
+      &:last-child {
+        margin-bottom: 0.5rem;
+      }
+
+      strong {
+        color: var(--text, #212529);
+      }
+    }
+  }
+}

projects/firefox/src/options.ts

@@ -5,6 +5,7 @@ import {
 } from '@common';
 import './app/common/extensions/array';
 import browser from 'webextension-polyfill';
+import { v4 as uuidv4 } from 'uuid';
 
 //
 // Functions
@@ -105,8 +106,12 @@ document.addEventListener('DOMContentLoaded', async () => {
         }
 
         newSnapshots.push({
+          id: uuidv4(),
           fileName: file.name,
+          createdAt: new Date().toISOString(),
           data: vault,
+          identityCount: vault.identities?.length ?? 0,
+          reason: 'manual',
         });
       }