Braintree Payment Provider for Medusa

This plugin integrates Braintree as a payment provider for your Medusa store. It allows you to process payments, handle 3D Secure authentication, and manage payment methods seamlessly.

Quick Start

1. Install the plugin:

   npm install @lambdacurry/medusa-payment-braintree

2. Set the required environment variables in your .env file (see below).
3. Add the provider to your medusa-config.js or config.ts (see below).
4. Add the required custom fields in your Braintree dashboard (see below).
5. Restart your Medusa server.

Features

• Secure payment processing with Braintree.
• Support for 3D Secure authentication.
• Webhook handling for payment updates.
• Save payment methods for future transactions.

Installation

Install the plugin in your Medusa project:

npm install @lambdacurry/medusa-payment-braintree

Configuration

Environment Variables

Set the following environment variables in your .env file:

BRAINTREE_PUBLIC_KEY=<your_public_key>
BRAINTREE_MERCHANT_ID=<your_merchant_id>
BRAINTREE_PRIVATE_KEY=<your_private_key>
BRAINTREE_WEBHOOK_SECRET=<your_webhook_secret>
BRAINTREE_ENVIRONMENT=sandbox|development|production|qa
BRAINTREE_ENABLE_3D_SECURE=true|false

• BRAINTREE_PUBLIC_KEY: Your Braintree public key.
• BRAINTREE_MERCHANT_ID: Your Braintree merchant ID.
• BRAINTREE_PRIVATE_KEY: Your Braintree private key.
• BRAINTREE_WEBHOOK_SECRET: Secret for validating Braintree webhooks.
• BRAINTREE_ENVIRONMENT: One of sandbox, development, production, or qa.
• BRAINTREE_ENABLE_3D_SECURE: Set to true to enable 3D Secure authentication, otherwise false.

Medusa Configuration

Add the following configuration to the payment section of your medusa-config.js or config.ts file:

dependencies:[Modules.CACHE]
{
  resolve: '@lambdacurry/medusa-payment-braintree/providers/payment-braintree',
  id: 'braintree',
  options: {
    environment: process.env.BRAINTREE_ENVIRONMENT || (process.env.NODE_ENV !== 'production' ? 'sandbox' : 'production'),
    defaultCurrencyCode: "USD",
    merchantId: process.env.BRAINTREE_MERCHANT_ID,
    publicKey: process.env.BRAINTREE_PUBLIC_KEY,
    privateKey: process.env.BRAINTREE_PRIVATE_KEY,
    webhookSecret: process.env.BRAINTREE_WEBHOOK_SECRET,
    enable3DSecure: process.env.BRAINTREE_ENABLE_3D_SECURE === 'true',
    savePaymentMethod: true, // Save payment methods for future use
    autoCapture: true,        // Automatically capture payments
  }
}

Options

• merchantId: Your Braintree Merchant ID.
• defaultCurrencyCode: An optional field to indicate default currency code
• publicKey: Your Braintree Public Key.
• privateKey: Your Braintree Private Key.
• webhookSecret: Secret for validating Braintree webhooks.
• enable3DSecure: Enable 3D Secure authentication (true or false).
• savePaymentMethod: Save payment methods for future use (default: true).
• autoCapture: Automatically capture payments (default: true).
• allowRefundOnRefunded: Allow refund attempts on already-refunded imported transactions (default: false).

Note:

• autoCapture: If set to true, payments are captured automatically after authorization.
• savePaymentMethod: If set to true, customer payment methods are saved for future use.
• allowRefundOnRefunded: If set to true, the imported payment provider will gracefully handle refund attempts on transactions that have already been refunded in Braintree. Instead of throwing an error, it will log a warning and record the refund locally only. This is useful when orders are imported and later refunded directly in Braintree.

3D Secure Setup

If you enable 3D Secure (BRAINTREE_ENABLE_3D_SECURE=true), you may need to make additional changes on your storefront to support 3D Secure flows. Refer to the Braintree 3D Secure documentation for more details.

Webhook Setup

To handle payment updates from Braintree, you need to configure webhooks:

1. In your Braintree dashboard, go to Settings > Webhooks.
2. Add a new webhook and set the URL to your Medusa server's webhook endpoint (e.g., https://your-medusa-server.com/webhooks/braintree).
3. Use the value of BRAINTREE_WEBHOOK_SECRET as the secret for validating incoming webhooks.
4. Make sure your Medusa server is configured to handle Braintree webhook events.

For more information, see the Braintree Webhooks documentation.

Adding Custom Fields in the Braintree Dashboard

To use custom fields, create them in your Braintree dashboard (API names must be lowercase). You will provide their values when calling authorizePayment via context.custom_fields.

1. Navigate to:
   Account Settings → Transactions → Custom Fields

2. Add each custom field:

   • Click the Options button.
   • Click the Add button.
   • Enter the details for each field as shown below:

Note

• Braintree only accepts values for custom fields that exist in your dashboard and match the field API names (lowercase).
• If you rely on webhooks that read medusa_payment_session_id, include that key in context.custom_fields when you call authorizePayment.

Passing Custom Fields to authorizePayment

Custom fields are forwarded to Braintree when the provider creates the transaction during authorizePayment. Provide them on the context as custom_fields.

Example:

// Example shape; Medusa calls the provider under the hood.
await braintreeProvider.authorizePayment({
  data: {
    amount: 10, // standard currency units; converted to "10.00"
    currency_code: 'USD',
    payment_method_nonce: '<client-side-nonce>',
  },
  context: {
    idempotency_key: 'sess_123',
    customer: { id: 'cust_123', email: 'c@example.com' },
    custom_fields: {
      medusa_payment_session_id: 'sess_123',
      cart_id: 'cart_123',
      customer_id: 'cust_123',
    },
    // Optional: shipping_address, billing_address, totals, items
  },
});

Requirements and tips:

• Provide custom_fields as an object of API name -> string value.
• Only fields that exist in Braintree will be accepted.
• For webhook correlation, set medusa_payment_session_id to your Medusa payment session or idempotency key.

Implementation detail: the provider passes context.custom_fields directly to Braintree’s customFields in the sale request (plugins/braintree-payment/src/providers/payment-braintree/src/core/braintree-base.ts:402).

License

This plugin is licensed under the MIT License.

For more information, visit the Braintree Documentation.