update

src/modules/cart/providers/cart.service.ts

@@ -20,6 +20,7 @@ import { Cart, CartItem } from '../interfaces/cart.interface';
 import { CouponService } from 'src/modules/coupons/providers/coupon.service';
 import { OrderCouponDetail } from 'src/modules/orders/interface/order-status';
 import { CouponType } from 'src/modules/coupons/interface/coupon';
+import { UserWallet } from 'src/modules/users/entities/user-wallet.entity';
 
 @Injectable()
 export class CartService {
@@ -221,11 +222,30 @@ export class CartService {
     const cart = await this.findOneOrFail(userId, restaurantId);
 
     await this.getEnabledPaymentMethodOrFail(restaurantId, setPaymentMethodDto.paymentMethodId);
-
+    await this.assertWalletHasEnoughBalance(userId, restaurantId,cart.total);
     cart.paymentMethodId = setPaymentMethodDto.paymentMethodId;
     return this.recalculateAndSaveCart(cart);
   }
 
+  private async assertWalletHasEnoughBalance(
+    userId: string,
+    restaurantId: string,
+    amount: number,
+  ): Promise<void> {
+    const wallet = await this.em.findOne(UserWallet, {
+      user: { id: userId },
+      restaurant: { id: restaurantId },
+    });
+  
+    if (!wallet) {
+      throw new BadRequestException('User wallet not found');
+    }
+  
+    if (wallet.wallet < amount) {
+      throw new BadRequestException('User wallet is not enough');
+    }
+  }
+  
   /**
    * Set delivery method for cart
    */