Improve merchant creation with automatic keypair generation

Enhance the merchant creation process by automatically generating Nostr keypairs
for users who don't have them, and streamline the API interface.

Changes:
- Add CreateMerchantRequest model to simplify merchant creation API
- Auto-generate Nostr keypairs for users without existing keys
- Update merchant creation endpoint to use user account keypairs
- Improve error handling and validation in merchant creation flow
- Clean up frontend JavaScript for merchant creation

This ensures all merchants have proper Nostr keypairs for marketplace
functionality without requiring manual key management from users.

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

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

models.py

@@ -44,6 +44,10 @@ class MerchantConfig(MerchantProfile):
     restore_in_progress: Optional[bool] = False
 
 
+class CreateMerchantRequest(BaseModel):
+    config: MerchantConfig = MerchantConfig()
+
+
 class PartialMerchant(BaseModel):
     private_key: str
     public_key: str

static/js/index.js

@@ -21,26 +21,18 @@ window.app = Vue.createApp({
   },
   methods: {
     generateKeys: async function () {
-      const privateKey = nostr.generatePrivateKey()
+      // No longer need to generate keys here - the backend will use user's existing keypairs
-      await this.createMerchant(privateKey)
+      await this.createMerchant()
     },
     importKeys: async function () {
       this.importKeyDialog.show = false
-      let privateKey = this.importKeyDialog.data.privateKey
+      // Import keys functionality removed since we use user's native keypairs
-      if (!privateKey) {
+      // Show a message that this is no longer needed
-        return
-      }
-      try {
-        if (privateKey.toLowerCase().startsWith('nsec')) {
-          privateKey = nostr.nip19.decode(privateKey).data
-        }
-      } catch (error) {
       this.$q.notify({
-          type: 'negative',
+        type: 'info',
-          message: `${error}`
+        message: 'Merchants now use your account Nostr keys automatically. Key import is no longer needed.',
+        timeout: 3000
       })
-      }
-      await this.createMerchant(privateKey)
     },
     showImportKeysDialog: async function () {
       this.importKeyDialog.show = true
@@ -94,12 +86,9 @@ window.app = Vue.createApp({
       this.activeChatCustomer = ''
       this.showKeys = false
     },
-    createMerchant: async function (privateKey) {
+    createMerchant: async function () {
       try {
-        const pubkey = nostr.getPublicKey(privateKey)
         const payload = {
-          private_key: privateKey,
-          public_key: pubkey,
           config: {}
         }
         const {data} = await LNbits.api.request(

views_api.py

@@ -4,6 +4,7 @@ from typing import List, Optional
 
 from fastapi import Depends
 from fastapi.exceptions import HTTPException
+from lnbits.core.crud import get_account, update_account
 from lnbits.core.services import websocket_updater
 from lnbits.decorators import (
     WalletTypeInfo,
@@ -11,6 +12,7 @@ from lnbits.decorators import (
     require_invoice_key,
 )
 from lnbits.utils.exchange_rates import currencies
+from lnbits.utils.nostr import generate_keypair
 from loguru import logger
 
 from . import nostr_client, nostrmarket_ext
@@ -59,6 +61,7 @@ from .crud import (
 )
 from .helpers import normalize_public_key
 from .models import (
+    CreateMerchantRequest,
     Customer,
     DirectMessage,
     DirectMessageType,
@@ -90,18 +93,48 @@ from .services import (
 
 @nostrmarket_ext.post("/api/v1/merchant")
 async def api_create_merchant(
-    data: PartialMerchant,
+    data: CreateMerchantRequest,
     wallet: WalletTypeInfo = Depends(require_admin_key),
 ) -> Merchant:
 
     try:
-        merchant = await get_merchant_by_pubkey(data.public_key)
+        # Check if merchant already exists for this user
-        assert merchant is None, "A merchant already uses this public key"
-
         merchant = await get_merchant_for_user(wallet.wallet.user)
         assert merchant is None, "A merchant already exists for this user"
 
-        merchant = await create_merchant(wallet.wallet.user, data)
+        # Get user's account to access their Nostr keypairs
+        account = await get_account(wallet.wallet.user)
+        if not account:
+            raise HTTPException(
+                status_code=HTTPStatus.NOT_FOUND,
+                detail="User account not found",
+            )
+
+        # Check if user has Nostr keypairs, generate them if not
+        if not account.pubkey or not account.prvkey:
+            # Generate new keypair for user
+            private_key, public_key = generate_keypair()
+            
+            # Update user account with new keypairs
+            account.pubkey = public_key
+            account.prvkey = private_key
+            await update_account(account)
+        else:
+            public_key = account.pubkey
+            private_key = account.prvkey
+
+        # Check if another merchant is already using this public key
+        existing_merchant = await get_merchant_by_pubkey(public_key)
+        assert existing_merchant is None, "A merchant already uses this public key"
+
+        # Create PartialMerchant with user's keypairs
+        partial_merchant = PartialMerchant(
+            private_key=private_key,
+            public_key=public_key,
+            config=data.config
+        )
+
+        merchant = await create_merchant(wallet.wallet.user, partial_merchant)
 
         await create_zone(
             merchant.id,
@@ -116,7 +149,7 @@ async def api_create_merchant(
 
         await resubscribe_to_all_merchants()
 
-        await nostr_client.merchant_temp_subscription(data.public_key)
+        await nostr_client.merchant_temp_subscription(public_key)
 
         return merchant
     except AssertionError as ex: