feat: Implement real-time wallet updates via WebSockets and streamline authentication token handling.

Author: sinwoojin

backend/src/auth/auth.controller.ts

@@ -13,7 +13,7 @@ export class AuthController {
   }
 
   @Post('login')
-  async login(@Body() body: { email: string; password: string }):Promise<{access_token: string; user: LoginUser}> {
+  async login(@Body() body: { email: string; password: string }):Promise<{accessToken: string; user: LoginUser}> {
     console.log('📌 Login request body:', body);
 
     const user = await this.authService.validateUser(body.email, body.password);

backend/src/auth/auth.module.ts

@@ -15,6 +15,6 @@ import { JwtStrategy } from './jwt.strategy';
   ],
   providers: [AuthService, JwtStrategy],
   controllers: [AuthController],
-  exports: [AuthService],
+  exports: [AuthService, JwtModule, JwtStrategy],
 })
 export class AuthModule {}

backend/src/auth/auth.service.ts

@@ -49,7 +49,7 @@ export class AuthService {
   async login(user: LoginUser) {
     const payload = { email: user.email, sub: user.id };
     return {
-      access_token: this.jwtService.sign(payload),
+      accessToken: this.jwtService.sign(payload),
       user,
     };
   }

backend/src/events/events.gateway.ts

@@ -1,6 +1,7 @@
 import {
   OnGatewayConnection,
   OnGatewayDisconnect,
+  SubscribeMessage,
   WebSocketGateway,
   WebSocketServer,
 } from '@nestjs/websockets';
@@ -19,9 +20,14 @@ export class EventsGateway implements OnGatewayConnection, OnGatewayDisconnect {
     console.log(`Client disconnected: ${client.id}`);
   }
 
+  @SubscribeMessage('joinUserRoom')
+  handleJoinRoom(client: Socket, userId: string) {
+    client.join(`user-${userId}`);
+    console.log(`User ${userId} joined room user-${userId}`);
+    return { success: true };
+  }
+
   sendWalletUpdate(userId: string, newBalance: number) {
-    // In a real app, you'd target the specific user's socket room
-    // For this demo, we'll just broadcast or emit to a room named after userId
     this.server
       .to(`user-${userId}`)
       .emit('walletUpdate', { balance: newBalance });

backend/src/wallet/wallet.module.ts

@@ -1,11 +1,12 @@
 import { Module } from '@nestjs/common';
+import { AuthModule } from 'src/auth/auth.module';
 import { DatabaseModule } from '../database/database.module';
 import { EventsModule } from '../events/events.module';
 import { WalletController } from './wallet.controller';
 import { WalletService } from './wallet.service';
 
 @Module({
-  imports: [DatabaseModule, EventsModule],
+  imports: [DatabaseModule, EventsModule, AuthModule],
   providers: [WalletService],
   controllers: [WalletController],
 })