feat: initialize NestJS project structure with Prisma, Supabase, and …

README.md

@@ -93,6 +93,94 @@ Nest is an MIT-licensed open source project. It can grow thanks to the sponsors
 - Website - [https://nestjs.com](https://nestjs.com/)
 - Twitter - [@nestframework](https://twitter.com/nestframework)
 
+## Payment Request Validation
+
+The backend supports validation and normalization of payment requests (including direct fields, serialized JSON strings, and URI schemes).
+
+### Endpoint
+`POST /v1/payment-requests/validate`
+
+### Curl Examples
+
+#### 1. Direct Structured Request (Valid)
+```bash
+curl -X POST http://localhost:3000/v1/payment-requests/validate \
+  -H "Content-Type: application/json" \
+  -d '{
+    "asset": "USDC",
+    "recipient": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
+    "amount": 250.0
+  }'
+```
+
+Response:
+```json
+{
+  "valid": true,
+  "normalizedPayload": {
+    "asset": "USDC",
+    "recipient": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
+    "amount": 250
+  }
+}
+```
+
+#### 2. URI String Payment Request (Valid)
+```bash
+curl -X POST http://localhost:3000/v1/payment-requests/validate \
+  -H "Content-Type: application/json" \
+  -d '{
+    "payload": "ethereum:0x742d35Cc6634C0532925a3b844Bc454e4438f44e?amount=150.0&asset=USDC"
+  }'
+```
+
+Response:
+```json
+{
+  "valid": true,
+  "normalizedPayload": {
+    "asset": "USDC",
+    "recipient": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
+    "amount": 150
+  }
+}
+```
+
+#### 3. Request with Validation Errors (Invalid)
+```bash
+curl -X POST http://localhost:3000/v1/payment-requests/validate \
+  -H "Content-Type: application/json" \
+  -d '{
+    "asset": "DOGE",
+    "recipient": "0xInvalidEthAddress",
+    "amount": -100
+  }'
+```
+
+Response:
+```json
+{
+  "valid": false,
+  "errors": [
+    {
+      "code": "INVALID_ASSET",
+      "message": "Asset 'DOGE' is not supported. Supported assets are: USDC, USDT, ETH, BTC, SOL, USD, EUR.",
+      "field": "asset"
+    },
+    {
+      "code": "INVALID_RECIPIENT",
+      "message": "Recipient address starts with 0x but is not a valid Ethereum address.",
+      "field": "recipient"
+    },
+    {
+      "code": "INVALID_AMOUNT",
+      "message": "Amount must be greater than zero.",
+      "field": "amount"
+    }
+  ]
+}
+```
+
 ## License
 
 Nest is [MIT licensed](https://github.com/nestjs/nest/blob/master/LICENSE).

package.json

@@ -24,7 +24,7 @@
     "@nestjs/config": "^4.0.4",
     "@nestjs/core": "^11.0.1",
     "@nestjs/platform-express": "^11.0.1",
-    "@prisma/client": "^7.8.0",
+    "@prisma/client": "^6.3.0",
     "@supabase/supabase-js": "^2.104.1",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1"
@@ -45,6 +45,7 @@
     "globals": "^16.0.0",
     "jest": "^30.0.0",
     "prettier": "^3.4.2",
+    "prisma": "^6.3.0",
     "source-map-support": "^0.5.21",
     "supertest": "^7.0.0",
     "ts-jest": "^29.2.5",

src/app.module.ts

@@ -7,6 +7,7 @@ import { SupabaseModule } from './supabase/supabase.module';
 import { UsersModule } from './users/users.module';
 import { PaymentsModule } from './payments/payments.module';
 import { TransactionsModule } from './transactions/transactions.module';
+import { PaymentRequestsModule } from './payment-requests/payment-requests.module';
 
 @Module({
   imports: [
@@ -18,6 +19,7 @@ import { TransactionsModule } from './transactions/transactions.module';
     UsersModule,
     PaymentsModule,
     TransactionsModule,
+    PaymentRequestsModule,
   ],
   controllers: [AppController],
   providers: [AppService],

src/payment-requests/dto/validate-payment-request.dto.ts

@@ -0,0 +1,7 @@
+export class ValidatePaymentRequestDto {
+  asset?: string;
+  recipient?: string;
+  amount?: number | string;
+  expiresAt?: string | number;
+  payload?: any;
+}

src/payment-requests/payment-requests.controller.spec.ts

@@ -0,0 +1,41 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { PaymentRequestsController } from './payment-requests.controller';
+import { PaymentRequestsService } from './payment-requests.service';
+
+describe('PaymentRequestsController', () => {
+  let controller: PaymentRequestsController;
+  let service: PaymentRequestsService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      controllers: [PaymentRequestsController],
+      providers: [PaymentRequestsService],
+    }).compile();
+
+    controller = module.get<PaymentRequestsController>(
+      PaymentRequestsController,
+    );
+    service = module.get<PaymentRequestsService>(PaymentRequestsService);
+  });
+
+  it('should be defined', () => {
+    expect(controller).toBeDefined();
+  });
+
+  describe('validate', () => {
+    it('should call service.validate and return result', () => {
+      const dto = {
+        asset: 'USDC',
+        recipient: '0x742d35Cc6634C0532925a3b844Bc454e4438f44e',
+        amount: 100,
+      };
+
+      const spy = jest.spyOn(service, 'validate');
+      const result = controller.validate(dto);
+
+      expect(spy).toHaveBeenCalledWith(dto);
+      expect(result.valid).toBe(true);
+      expect(result.normalizedPayload?.amount).toBe(100);
+    });
+  });
+});

src/payment-requests/payment-requests.controller.ts

@@ -0,0 +1,19 @@
+import { Controller, Post, Body, HttpCode, HttpStatus } from '@nestjs/common';
+import {
+  PaymentRequestsService,
+  ValidationResult,
+} from './payment-requests.service';
+import { ValidatePaymentRequestDto } from './dto/validate-payment-request.dto';
+
+@Controller('v1/payment-requests')
+export class PaymentRequestsController {
+  constructor(
+    private readonly paymentRequestsService: PaymentRequestsService,
+  ) {}
+
+  @Post('validate')
+  @HttpCode(HttpStatus.OK)
+  validate(@Body() dto: ValidatePaymentRequestDto): ValidationResult {
+    return this.paymentRequestsService.validate(dto);
+  }
+}

src/payment-requests/payment-requests.module.ts

@@ -0,0 +1,10 @@
+import { Module } from '@nestjs/common';
+import { PaymentRequestsService } from './payment-requests.service';
+import { PaymentRequestsController } from './payment-requests.controller';
+
+@Module({
+  providers: [PaymentRequestsService],
+  controllers: [PaymentRequestsController],
+  exports: [PaymentRequestsService],
+})
+export class PaymentRequestsModule {}