feat(point-of-sale): POST payment route

packages/point-of-sale/src/app.ts

@@ -18,6 +18,7 @@ import {
 } from './merchant/devices/routes'
 import { PosDeviceService } from './merchant/devices/service'
 import { MerchantService } from './merchant/service'
+import { PaymentContext, PaymentRoutes } from './payments/routes'
 
 export interface AppServices {
   logger: Promise<Logger>
@@ -27,6 +28,7 @@ export interface AppServices {
   posDeviceRoutes: Promise<PosDeviceRoutes>
   posDeviceService: Promise<PosDeviceService>
   merchantService: Promise<MerchantService>
+  paymentRoutes: Promise<PaymentRoutes>
 }
 
 export type AppContainer = IocContract<AppServices>
@@ -71,6 +73,7 @@ export class App {
 
     const merchantRoutes = await this.container.use('merchantRoutes')
     const posDeviceRoutes = await this.container.use('posDeviceRoutes')
+    const paymentRoutes = await this.container.use('paymentRoutes')
 
     // POST /merchants
     // Create merchant
@@ -93,6 +96,10 @@ export class App {
       posDeviceRoutes.register
     )
 
+    // POST /payment
+    // Initiate a payment
+    router.post<DefaultState, PaymentContext>('/payment', paymentRoutes.payment)
+
     koa.use(cors())
     koa.use(router.routes())
 

packages/point-of-sale/src/index.ts

@@ -20,7 +20,9 @@ import { createPosDeviceService } from './merchant/devices/service'
 import { createMerchantRoutes } from './merchant/routes'
 import { createPaymentService } from './payments/service'
 import { createPosDeviceRoutes } from './merchant/devices/routes'
+import { createPaymentRoutes } from './payments/routes'
 import axios from 'axios'
+import { createCardServiceClient } from './card-service-client/client'
 
 export function initIocContainer(
   config: typeof Config
@@ -183,20 +185,32 @@ export function initIocContainer(
     async (deps: IocContract<AppServices>) => {
       const logger = await deps.use('logger')
       const knex = await deps.use('knex')
-      return await createPosDeviceService({
-        logger,
-        knex
-      })
+      return await createPosDeviceService({ logger, knex })
     }
   )
 
+  container.singleton('cardServiceClient', async (deps) => {
+    return createCardServiceClient({
+      logger: await deps.use('logger'),
+      axios: await deps.use('axios')
+    })
+  })
+
   container.singleton('posDeviceRoutes', async (deps) =>
     createPosDeviceRoutes({
       logger: await deps.use('logger'),
       posDeviceService: await deps.use('posDeviceService')
     })
   )
 
+  container.singleton('paymentRoutes', async (deps) => {
+    return createPaymentRoutes({
+      logger: await deps.use('logger'),
+      paymentService: await deps.use('paymentClient'),
+      cardServiceClient: await deps.use('cardServiceClient')
+    })
+  })
+
   return container
 }
 

packages/point-of-sale/src/payments/routes.test.ts

@@ -0,0 +1,128 @@
+import { IocContract } from '@adonisjs/fold'
+import { initIocContainer } from '..'
+import { AppServices } from '../app'
+import { Config } from '../config/app'
+import { TestContainer, createTestApp } from '../tests/app'
+import { PaymentContext, PaymentRoutes } from './routes'
+import { truncateTables } from '../tests/tableManager'
+import { PaymentService } from './service'
+import { CardServiceClient, Result } from '../card-service-client/client'
+import { createContext } from '../tests/context'
+import { CardServiceClientError } from '../card-service-client/errors'
+
+describe('Payment Routes', () => {
+  let deps: IocContract<AppServices>
+  let appContainer: TestContainer
+  let paymentRoutes: PaymentRoutes
+  let paymentService: PaymentService
+  let cardServiceClient: CardServiceClient
+
+  beforeAll(async () => {
+    deps = initIocContainer(Config)
+    appContainer = await createTestApp(deps)
+    paymentService = await deps.use('paymentClient')
+    cardServiceClient = await deps.use('cardServiceClient')
+    paymentRoutes = await deps.use('paymentRoutes')
+  })
+
+  beforeEach(() => {
+    jest.clearAllMocks()
+  })
+
+  afterEach(async (): Promise<void> => {
+    await truncateTables(deps)
+  })
+
+  afterAll(async (): Promise<void> => {
+    await appContainer.shutdown()
+  })
+
+  describe('payment', () => {
+    test('returns 200 with result approved', async () => {
+      const ctx = createPaymentContext()
+      mockPaymentService()
+      jest
+        .spyOn(cardServiceClient, 'sendPayment')
+        .mockResolvedValueOnce(Result.APPROVED)
+
+      await paymentRoutes.payment(ctx)
+      expect(ctx.response.body).toBe(Result.APPROVED)
+      expect(ctx.status).toBe(200)
+    })
+
+    test('returns 401 with result card_expired or invalid_signature', async () => {
+      const ctx = createPaymentContext()
+      mockPaymentService()
+      jest
+        .spyOn(cardServiceClient, 'sendPayment')
+        .mockResolvedValueOnce(Result.CARD_EXPIRED)
+
+      await paymentRoutes.payment(ctx)
+      expect(ctx.response.body).toBe(Result.CARD_EXPIRED)
+      expect(ctx.status).toBe(401)
+    })
+
+    test('returns cardService error code when thrown', async () => {
+      const ctx = createPaymentContext()
+      mockPaymentService()
+      jest
+        .spyOn(cardServiceClient, 'sendPayment')
+        .mockRejectedValue(new CardServiceClientError('Some error', 404))
+      await paymentRoutes.payment(ctx)
+      expect(ctx.response.body).toBe('Some error')
+      expect(ctx.status).toBe(404)
+    })
+
+    test('returns 400 when there is a paymentService error', async () => {
+      const ctx = createPaymentContext()
+      jest
+        .spyOn(paymentService, 'getWalletAddress')
+        .mockRejectedValueOnce(new Error('Wallet address error'))
+      await paymentRoutes.payment(ctx)
+      expect(ctx.response.body).toBe('Wallet address error')
+      expect(ctx.status).toBe(400)
+    })
+
+    test('returns 500 when an unknown error is thrown', async () => {
+      const ctx = createPaymentContext()
+      jest
+        .spyOn(paymentService, 'getWalletAddress')
+        .mockRejectedValueOnce('Unknown error')
+      await paymentRoutes.payment(ctx)
+      expect(ctx.response.body).toBe('Unknown error')
+      expect(ctx.status).toBe(500)
+    })
+
+    function mockPaymentService() {
+      jest.spyOn(paymentService, 'getWalletAddress').mockResolvedValueOnce({
+        id: 'id',
+        assetCode: 'USD',
+        assetScale: 1,
+        authServer: 'authServer',
+        resourceServer: 'resourceServer',
+        cardService: 'cardService'
+      })
+      jest
+        .spyOn(paymentService, 'createIncomingPayment')
+        .mockResolvedValueOnce('incoming-payment-url')
+    }
+  })
+})
+
+function createPaymentContext() {
+  return createContext<PaymentContext>({
+    headers: { Accept: 'application/json' },
+    method: 'POST',
+    url: `/payment`,
+    body: {
+      card: {
+        walletAddress: 'wallet-address',
+        trasactionCounter: 0,
+        expiry: new Date(new Date().getDate() + 1)
+      },
+      signature: 'signature',
+      value: 100,
+      merchantWalletAddress: 'merchant-wallet-address'
+    }
+  })
+}

packages/point-of-sale/src/payments/routes.ts

@@ -0,0 +1,93 @@
+import { AppContext } from '../app'
+import { CardServiceClient, Result } from '../card-service-client/client'
+import { AmountInput } from '../graphql/generated/graphql'
+import { BaseService } from '../shared/baseService'
+import { PaymentService } from './service'
+import { CardServiceClientError } from '../card-service-client/errors'
+
+interface ServiceDependencies extends BaseService {
+  paymentService: PaymentService
+  cardServiceClient: CardServiceClient
+}
+
+export type PaymentBody = {
+  card: {
+    walletAddress: string
+    trasactionCounter: number
+    expiry: Date
+  }
+  signature: string
+  value: bigint
+  merchantWalletAddress: string
+}
+type PaymentRequest = Exclude<AppContext['request'], 'body'> & {
+  body: PaymentBody
+}
+
+export type PaymentContext = Exclude<AppContext, 'request'> & {
+  request: PaymentRequest
+}
+
+export interface PaymentRoutes {
+  payment(ctx: PaymentContext): Promise<void>
+}
+
+export function createPaymentRoutes(deps_: ServiceDependencies): PaymentRoutes {
+  const log = deps_.logger.child({
+    service: 'PaymentRoutes'
+  })
+
+  const deps = {
+    ...deps_,
+    logger: log
+  }
+
+  return {
+    payment: (ctx: PaymentContext) => payment(deps, ctx)
+  }
+}
+
+async function payment(
+  deps: ServiceDependencies,
+  ctx: PaymentContext
+): Promise<void> {
+  const body = ctx.request.body
+  try {
+    const walletAddress = await deps.paymentService.getWalletAddress(
+      body.card.walletAddress
+    )
+    const incomingAmount: AmountInput = {
+      assetCode: walletAddress.assetCode,
+      assetScale: walletAddress.assetScale,
+      value: body.value
+    }
+    const incomingPaymentUrl = await deps.paymentService.createIncomingPayment(
+      walletAddress.id,
+      incomingAmount
+    )
+    const result = await deps.cardServiceClient.sendPayment({
+      merchantWalletAddress: body.merchantWalletAddress,
+      incomingPaymentUrl,
+      date: new Date(),
+      signature: body.signature,
+      card: body.card
+    })
+
+    ctx.body = result
+    ctx.status = result === Result.APPROVED ? 200 : 401
+  } catch (err) {
+    const { body, status } = handlePaymentError(err)
+    ctx.body = body
+    ctx.status = status
+  }
+}
+
+function handlePaymentError(err: unknown) {
+  if (err instanceof CardServiceClientError) {
+    return { body: err.message, status: err.status }
+  }
+  if (err instanceof Error) {
+    return { body: err.message, status: 400 }
+  }
+  return { body: err, status: 500 }
+}