feat(payments-plugin): Add multi currency support for braintree plugin

packages/payments-plugin/README.md

@@ -37,3 +37,26 @@ STRIPE_PUBLISHABLE_KEY=pk_test_xxxx
 3. Watch the logs for the link or go to `http://localhost:3050/checkout` to test the checkout.
 
 After checkout completion you can see your payment in https://dashboard.stripe.com/test/payments/
+
+### Braintree local development
+
+For testing out changes to the Braintree plugin locally, with a real Braintree account, follow the steps below. These steps
+will create an order, set Braintree as payment method, and create a clientToken, which will be used with a drop-in UI on the test checkout page.
+
+1. Get the test keys from your Braintree dashboard, under menu settings, API section: https://sandbox.braintreegateway.com
+2. Create a `.env` file in the `packages/payments-plugin` directory with the following content:
+3. Optionally, if you want to add multi currency support, on Braintree dashboard, under menu settings, Business section, get Merchant Account ID keys.
+
+```sh
+BRAINTREE_PRIVATE_KEY=asdf...
+BRAINTREE_PUBLIC_KEY=ghjk...
+BRAINTREE_MERCHANT_ID=12ly...
+BRAINTREE_ENVIRONMENT=sandbox
+BRAINTREE_MERCHANT_ACCOUNT_ID_EUR=account_for_eur #optional, can be used a different naming scheme as well
+BRAINTREE_MERCHANT_ACCOUNT_ID_USD=account_for_usd #optional, can be used a different naming scheme as well
+```
+
+1. `cd packages/payments-plugin`
+2. `npm run dev-server:braintree`
+3. Watch the logs for the link or go to `http://localhost:3050/checkout` to test the checkout.
+4. If you have added `BRAINTREE_MERCHANT_ACCOUNT_ID_XXX`, those have to be added to BraintreePlugin options in `e2e/braintree-dev-server.ts`

packages/payments-plugin/e2e/braintree-dev-server.ts

@@ -0,0 +1,132 @@
+import { AdminUiPlugin } from '@vendure/admin-ui-plugin';
+import {
+    ChannelService,
+    configureDefaultOrderProcess,
+    DefaultLogger,
+    LanguageCode,
+    Logger,
+    LogLevel,
+    mergeConfig,
+    OrderService,
+    RequestContext,
+} from '@vendure/core';
+import {
+    createTestEnvironment,
+    registerInitializer,
+    SimpleGraphQLClient,
+    SqljsInitializer,
+    testConfig,
+} from '@vendure/testing';
+import gql from 'graphql-tag';
+import path from 'path';
+
+import { initialData } from '../../../e2e-common/e2e-initial-data';
+import { BraintreePlugin } from '../src/braintree';
+import { braintreePaymentMethodHandler } from '../src/braintree/braintree.handler';
+
+/* eslint-disable */
+import { CREATE_PAYMENT_METHOD } from './graphql/admin-queries';
+import {
+    CreatePaymentMethodMutation,
+    CreatePaymentMethodMutationVariables,
+} from './graphql/generated-admin-types';
+import {
+    AddItemToOrderMutation,
+    AddItemToOrderMutationVariables,
+    AddPaymentToOrderMutation,
+    AddPaymentToOrderMutationVariables,
+} from './graphql/generated-shop-types';
+import { ADD_ITEM_TO_ORDER, ADD_PAYMENT } from './graphql/shop-queries';
+import { GENERATE_BRAINTREE_CLIENT_TOKEN, proceedToArrangingPayment, setShipping } from './payment-helpers';
+import braintree, { Environment, Test } from 'braintree';
+import { BraintreeTestPlugin } from './fixtures/braintree-checkout-test.plugin';
+
+export let clientToken: string;
+export let exposedShopClient: SimpleGraphQLClient;
+
+/**
+ * The actual starting of the dev server
+ */
+(async () => {
+    require('dotenv').config();
+
+    registerInitializer('sqljs', new SqljsInitializer(path.join(__dirname, '__data__')));
+    const config = mergeConfig(testConfig, {
+        authOptions: {
+            tokenMethod: ['bearer', 'cookie'],
+            cookieOptions: {
+                secret: 'cookie-secret',
+            },
+        },
+        plugins: [
+            ...testConfig.plugins,
+            AdminUiPlugin.init({
+                route: 'admin',
+                port: 5001,
+            }),
+            BraintreePlugin.init({
+                storeCustomersInBraintree: false,
+                environment: Environment.Sandbox,
+                merchantAccountIds: {
+                    USD: process.env.BRAINTREE_MERCHANT_ACCOUNT_ID_USD,
+                    EUR: process.env.BRAINTREE_MERCHANT_ACCOUNT_ID_EUR,
+                },
+            }),
+            BraintreeTestPlugin,
+        ],
+        logger: new DefaultLogger({ level: LogLevel.Debug }),
+    });
+    const { server, shopClient, adminClient } = createTestEnvironment(config as any);
+    exposedShopClient = shopClient;
+    await server.init({
+        initialData,
+        productsCsvPath: path.join(__dirname, 'fixtures/e2e-products-minimal.csv'),
+        customerCount: 1,
+    });
+    // Create method
+    await adminClient.asSuperAdmin();
+    await adminClient.query<CreatePaymentMethodMutation, CreatePaymentMethodMutationVariables>(
+        CREATE_PAYMENT_METHOD,
+        {
+            input: {
+                code: 'braintree-payment-method',
+                enabled: true,
+                translations: [
+                    {
+                        name: 'Braintree',
+                        description: 'This is a Braintree test payment method',
+                        languageCode: LanguageCode.en,
+                    },
+                ],
+                handler: {
+                    code: braintreePaymentMethodHandler.code,
+                    arguments: [
+                        { name: 'privateKey', value: process.env.BRAINTREE_PRIVATE_KEY! },
+                        { name: 'publicKey', value: process.env.BRAINTREE_PUBLIC_KEY! },
+                        { name: 'merchantId', value: process.env.BRAINTREE_MERCHANT_ID! },
+                    ],
+                },
+            },
+        },
+    );
+    // Prepare order for payment
+    await shopClient.asUserWithCredentials('[email protected]', 'test');
+    await shopClient.query<AddItemToOrderMutation, AddItemToOrderMutationVariables>(ADD_ITEM_TO_ORDER, {
+        productVariantId: 'T_1',
+        quantity: 1,
+    });
+    const ctx = new RequestContext({
+        apiType: 'admin',
+        isAuthorized: true,
+        authorizedAsOwnerOnly: false,
+        channel: await server.app.get(ChannelService).getDefaultChannel(),
+    });
+    await server.app.get(OrderService).addSurchargeToOrder(ctx, 1, {
+        description: 'Negative test surcharge',
+        listPrice: -20000,
+    });
+    await setShipping(shopClient);
+    const { generateBraintreeClientToken } = await shopClient.query(GENERATE_BRAINTREE_CLIENT_TOKEN);
+    clientToken = generateBraintreeClientToken;
+    Logger.info('http://localhost:3050/checkout', 'Braintree DevServer');
+})();

packages/payments-plugin/e2e/fixtures/braintree-checkout-test.plugin.ts

@@ -0,0 +1,114 @@
+/* eslint-disable */
+import { Body, Controller, Get, Post, Res } from '@nestjs/common';
+import { PluginCommonModule, VendurePlugin } from '@vendure/core';
+import { Response } from 'express';
+
+import { clientToken, exposedShopClient } from '../braintree-dev-server';
+import {
+    AddPaymentToOrderMutation,
+    AddPaymentToOrderMutationVariables,
+} from '../graphql/generated-shop-types';
+import { ADD_PAYMENT } from '../graphql/shop-queries';
+import { proceedToArrangingPayment } from '../payment-helpers';
+/**
+ * This test controller returns the Braintree drop-in checkout page
+ * with the client secret generated by the dev-server
+ */
+@Controller()
+export class BraintreeTestCheckoutController {
+    @Get('checkout')
+    async client(@Res() res: Response): Promise<void> {
+        res.send(`
+<head>
+  <title>Checkout</title>
+  <script src="https://js.braintreegateway.com/web/dropin/1.33.3/js/dropin.min.js"></script>
+</head>
+<html>
+
+<div id="dropin-container"></div>
+<button id="submit-button">Purchase</button>
+<div id="result"/>
+
+<script>    
+    var submitButton = document.querySelector('#submit-button');
+    braintree.dropin.create({
+        authorization: "${clientToken}",
+        container: '#dropin-container',
+        dataCollector: true,
+        paypal: {
+            flow: 'checkout',
+            amount: 100,
+            currency: 'GBP',
+        },
+    }, function (err, dropinInstance) {
+
+        submitButton.addEventListener('click', function () {
+            dropinInstance.requestPaymentMethod(async function (err, payload) {
+                sendPayloadToServer(payload)
+            });
+        });
+
+        if (dropinInstance.isPaymentMethodRequestable()) {
+            // This will be true if you generated the client token
+            // with a customer ID and there is a saved payment method
+            // available to tokenize with that customer.
+            submitButton.removeAttribute('disabled');
+        }
+
+        dropinInstance.on('paymentMethodRequestable', function (event) {
+            console.log(event.type); // The type of Payment Method, e.g 'CreditCard', 'PayPalAccount'.
+            console.log(event.paymentMethodIsSelected); // true if a customer has selected a payment method when paymentMethodRequestable fires
+            submitButton.removeAttribute('disabled');
+        });
+
+        dropinInstance.on('noPaymentMethodRequestable', function () {
+            submitButton.setAttribute('disabled', true);
+        });
+    });
+
+    async function sendPayloadToServer(payload) {
+        const response = await fetch('checkout', {
+            method: 'POST', 
+            headers: {
+                'Content-Type': 'application/json',
+                'Accept': 'application/json',       
+                'Credentials': 'include',
+            },
+            body: JSON.stringify(payload)
+        })
+        .then(res => res.json())
+        .catch(err => console.error(err))
+
+        document.querySelector('#result').innerHTML = JSON.stringify(response)
+        console.log(response)
+
+    }
+</script>
+
+</html>
+    `);
+    }
+    @Post('checkout')
+    async test(@Body() body: Request, @Res() res: Response): Promise<void> {
+        await proceedToArrangingPayment(exposedShopClient);
+        const { addPaymentToOrder } = await exposedShopClient.query<
+            AddPaymentToOrderMutation,
+            AddPaymentToOrderMutationVariables
+        >(ADD_PAYMENT, {
+            input: {
+                method: 'braintree-payment-method',
+                metadata: body,
+            },
+        });
+        res.send(addPaymentToOrder);
+    }
+}
+
+/**
+ * Test plugin for serving the Stripe intent checkout page
+ */
+@VendurePlugin({
+    imports: [PluginCommonModule],
+    controllers: [BraintreeTestCheckoutController],
+})
+export class BraintreeTestPlugin {}

packages/payments-plugin/e2e/fixtures/stripe-checkout-test.plugin.ts

@@ -18,8 +18,8 @@ export class StripeTestCheckoutController {
   <title>Checkout</title>
   <script src="https://js.stripe.com/v3/"></script>
 </head>
-<html>
 
+<html>
 <form id="payment-form">
   <div id="payment-element">
     <!-- Elements will create form elements here -->

packages/payments-plugin/e2e/payment-helpers.ts

@@ -229,6 +229,12 @@ export const CREATE_STRIPE_PAYMENT_INTENT = gql`
     }
 `;
 
+export const GENERATE_BRAINTREE_CLIENT_TOKEN = gql`
+    query generateBraintreeClientToken {
+        generateBraintreeClientToken
+    }
+`;
+
 export const CREATE_CUSTOM_STRIPE_PAYMENT_INTENT = gql`
     mutation createCustomStripePaymentIntent {
         createCustomStripePaymentIntent

packages/payments-plugin/e2e/stripe-dev-server.ts

@@ -26,6 +26,7 @@ import {
 } from './graphql/generated-admin-types';
 import { AddItemToOrderMutation, AddItemToOrderMutationVariables } from './graphql/generated-shop-types';
 import { ADD_ITEM_TO_ORDER } from './graphql/shop-queries';
+import { StripeCheckoutTestPlugin } from './fixtures/stripe-checkout-test.plugin';
 import {
     CREATE_CUSTOM_STRIPE_PAYMENT_INTENT,
     CREATE_STRIPE_PAYMENT_INTENT,

packages/payments-plugin/package.json

@@ -20,7 +20,8 @@
         "lint": "eslint --fix .",
         "ci": "npm run build",
         "dev-server:mollie": "npm run build && DB=sqlite node -r ts-node/register e2e/mollie-dev-server.ts",
-        "dev-server:stripe": "npm run build && DB=sqlite node -r ts-node/register e2e/stripe-dev-server.ts"
+        "dev-server:stripe": "npm run build && DB=sqlite node -r ts-node/register e2e/stripe-dev-server.ts",
+        "dev-server:braintree": "npm run build && DB=sqlite node -r ts-node/register e2e/braintree-dev-server.ts"
     },
     "homepage": "https://www.vendure.io/",
     "funding": "https://github.com/sponsors/michaelbromley",
@@ -60,4 +61,4 @@
         "stripe": "^13.3.0",
         "typescript": "5.8.2"
     }
-}
+}

packages/payments-plugin/src/braintree/braintree-common.ts

@@ -1,6 +1,7 @@
+import { CurrencyCode } from '@vendure/core';
 import { BraintreeGateway, Environment, Transaction } from 'braintree';
 
-import { BraintreePluginOptions, PaymentMethodArgsHash } from './types';
+import { BraintreeMerchantAccountIds, BraintreePluginOptions, PaymentMethodArgsHash } from './types';
 
 export function getGateway(args: PaymentMethodArgsHash, options: BraintreePluginOptions): BraintreeGateway {
     return new BraintreeGateway({
@@ -74,3 +75,21 @@ function decodeAvsCode(code: string): string {
             return 'Unknown';
     }
 }
+
+/**
+ * @description
+ * Looks up a single merchantAccountId from `merchantAccountIds` passed through the plugin options.
+ * Example: `{NOK: BRAINTREE_MERCHANT_ACCOUNT_ID_NOK}` for Norway.
+ * Merchant Account IDs have to be setup in the Braintree dashboard,
+ * see: https://developer.paypal.com/braintree/articles/control-panel/important-gateway-credentials#merchant-account-id
+ */
+export function lookupMerchantAccountIdByCurrency(
+    merchantAccountIds: BraintreeMerchantAccountIds | undefined,
+    currencyCode: CurrencyCode,
+): string | undefined {
+    if (!merchantAccountIds || !currencyCode) {
+        return undefined;
+    }
+    const merchantAccountIdForCurrency = merchantAccountIds[currencyCode];
+    return merchantAccountIdForCurrency;
+}

packages/payments-plugin/src/braintree/braintree.handler.ts

@@ -11,7 +11,7 @@ import {
 } from '@vendure/core';
 import { BraintreeGateway } from 'braintree';
 
-import { defaultExtractMetadataFn, getGateway } from './braintree-common';
+import { defaultExtractMetadataFn, getGateway, lookupMerchantAccountIdByCurrency } from './braintree-common';
 import { BRAINTREE_PLUGIN_OPTIONS, loggerCtx } from './constants';
 import { BraintreePluginOptions } from './types';
 
@@ -95,11 +95,17 @@ async function processPayment(
     customerId: string | undefined,
     pluginOptions: BraintreePluginOptions,
 ) {
+    const merchantAccountId = lookupMerchantAccountIdByCurrency(
+        options.merchantAccountIds,
+        order.currencyCode,
+    );
+
     const response = await gateway.transaction.sale({
         customerId,
         amount: (amount / 100).toString(10),
         orderId: order.code,
         paymentMethodNonce,
+        merchantAccountId,
         options: {
             submitForSettlement: true,
             storeInVaultOnSuccess: !!customerId,

packages/payments-plugin/src/braintree/braintree.plugin.ts

@@ -238,6 +238,7 @@ import { BraintreePluginOptions } from './types';
  * @docsCategory core plugins/PaymentsPlugin
  * @docsPage BraintreePlugin
  */
+
 @VendurePlugin({
     imports: [PluginCommonModule],
     providers: [