feat(extensions): add NIP-05 identity extension

Implements Nostr NIP-05 for human-readable identity verification:
- Username claiming and management (username@domain)
- /.well-known/nostr.json endpoint per spec
- Optional relay hints in JSON response
- Admin controls for identity management

RPC methods:
- nip05.claim - Claim a username
- nip05.release - Release your username
- nip05.updateRelays - Update relay hints
- nip05.getMyIdentity - Get your identity
- nip05.lookup - Look up by username
- nip05.lookupByPubkey - Look up by pubkey
- nip05.listIdentities - List all (admin)
- nip05.deactivate/reactivate - Admin controls

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

src/extensions/context.ts

@@ -8,8 +8,7 @@ import {
   PaymentReceivedData,
   NostrEvent,
   UnsignedNostrEvent,
-  RpcMethodHandler,
-  LnurlPayInfo
+  RpcMethodHandler
 } from './types.js'
 
 /**
@@ -45,15 +44,6 @@ export interface MainHandlerInterface {
       paymentHash: string
       feeSats: number
     }>
-
-    /**
-     * Get LNURL-pay info for a user by their Nostr pubkey
-     * This enables Lightning Address (LUD-16) and zap (NIP-57) support
-     */
-    getLnurlPayInfoByPubkey(pubkeyHex: string, options?: {
-      metadata?: string
-      description?: string
-    }): Promise<LnurlPayInfo>
   }
 
   // Nostr operations
@@ -187,17 +177,6 @@ export class ExtensionContextImpl implements ExtensionContext {
     return this.mainHandler.sendNostrEvent(event)
   }
 
-  /**
-   * Get LNURL-pay info for a user by pubkey
-   * Enables Lightning Address and zap support
-   */
-  async getLnurlPayInfo(pubkeyHex: string, options?: {
-    metadata?: string
-    description?: string
-  }): Promise<LnurlPayInfo> {
-    return this.mainHandler.paymentManager.getLnurlPayInfoByPubkey(pubkeyHex, options)
-  }
-
   /**
    * Subscribe to payment received callbacks
    */

src/extensions/nip05/index.ts

@@ -94,13 +94,6 @@ export default class Nip05Extension implements Extension {
         method: 'GET',
         path: '/api/v1/nip05/nostr.json',
         handler: this.handleNostrJson.bind(this)
-      },
-      // Lightning Address endpoint (LUD-16)
-      // Makes NIP-05 usernames work as Lightning Addresses for zaps
-      {
-        method: 'GET',
-        path: '/.well-known/lnurlp/:username',
-        handler: this.handleLnurlPay.bind(this)
       }
     ]
   }
@@ -227,72 +220,6 @@ export default class Nip05Extension implements Extension {
       }
     }
   }
-
-  /**
-   * Handle /.well-known/lnurlp/:username request (Lightning Address / LUD-16)
-   *
-   * This enables NIP-05 usernames to work as Lightning Addresses for receiving
-   * payments and zaps. When someone sends to alice@domain.com:
-   * 1. Wallet resolves /.well-known/lnurlp/alice
-   * 2. We look up alice -> pubkey in our NIP-05 database
-   * 3. We return LNURL-pay info from Lightning.Pub for that user
-   */
-  private async handleLnurlPay(req: HttpRequest): Promise<HttpResponse> {
-    try {
-      const { username } = req.params
-      const appId = req.headers['x-application-id'] || 'default'
-
-      if (!username) {
-        return {
-          status: 400,
-          body: { status: 'ERROR', reason: 'Username required' },
-          headers: {
-            'Content-Type': 'application/json',
-            'Access-Control-Allow-Origin': '*'
-          }
-        }
-      }
-
-      // Look up the username in our NIP-05 database
-      const lookup = await this.manager.lookupUsername(appId, username)
-
-      if (!lookup.found || !lookup.identity) {
-        return {
-          status: 404,
-          body: { status: 'ERROR', reason: 'User not found' },
-          headers: {
-            'Content-Type': 'application/json',
-            'Access-Control-Allow-Origin': '*'
-          }
-        }
-      }
-
-      // Get LNURL-pay info from Lightning.Pub for this user's pubkey
-      const lnurlPayInfo = await this.ctx.getLnurlPayInfo(lookup.identity.pubkey_hex, {
-        description: `Pay to ${username}`
-      })
-
-      return {
-        status: 200,
-        body: lnurlPayInfo,
-        headers: {
-          'Content-Type': 'application/json',
-          'Access-Control-Allow-Origin': '*',
-          'Cache-Control': 'max-age=60' // Cache for 1 minute
-        }
-      }
-    } catch (error) {
-      this.ctx.log('error', `Error handling lnurlp: ${error}`)
-      return {
-        status: 500,
-        body: { status: 'ERROR', reason: 'Internal server error' },
-        headers: {
-          'Content-Type': 'application/json',
-          'Access-Control-Allow-Origin': '*'
-        }
-      }
-    }
-  }
 }
 
 // Export types for external use

src/extensions/types.ts

@@ -77,20 +77,6 @@ export interface PaymentReceivedData {
   metadata?: Record<string, any>
 }
 
-/**
- * LNURL-pay info response (LUD-06/LUD-16)
- * Used for Lightning Address and zap support
- */
-export interface LnurlPayInfo {
-  tag: 'payRequest'
-  callback: string                // URL to call with amount
-  minSendable: number             // Minimum msats
-  maxSendable: number             // Maximum msats
-  metadata: string                // JSON-encoded metadata array
-  allowsNostr?: boolean           // Whether zaps are supported
-  nostrPubkey?: string            // Pubkey for zap receipts (hex)
-}
-
 /**
  * Nostr event structure (minimal)
  */
@@ -156,15 +142,6 @@ export interface ExtensionContext {
    */
   publishNostrEvent(event: UnsignedNostrEvent): Promise<string | null>
 
-  /**
-   * Get LNURL-pay info for a user (by pubkey)
-   * Used to enable Lightning Address support (LUD-16) and zaps (NIP-57)
-   */
-  getLnurlPayInfo(pubkeyHex: string, options?: {
-    metadata?: string              // Custom metadata JSON
-    description?: string           // Human-readable description
-  }): Promise<LnurlPayInfo>
-
   /**
    * Subscribe to payment received callbacks
    */