feat: adds support for carrier open endpoint

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Removes the deprecated, unusable `addCreditCard` function
   - Stripe has disabled the ability to pass plain credit card details over the wire and now requires using [Stripe.js/Elements/Checkout](https://support.stripe.com/questions/card-tokenization-restrictions-using-publishable-keys). Follow the [Decentralized (EasyPost-Manage Billing) Guide](https://docs.easypost.com/guides/get-started-with-forge/easypost-managed-billing-guide#referralcustomer-billing-management) for more details on the new flow to use.
   - Makes `referralCustomer.retrieveEasyPostStripeApiKey` public to help facilitate adding credit cards using Stripe.js
+- Adds support for `FedexDefaultAccount`, `GofoWalletAccount`, `UpsDapAccount`, `UniUniWalletAccount`, and `VehoWalletAccount` by properly routing carrier-account create requests to the `/carrier_accounts/open` endpoint.
 
 ## v9.0.0-rc.1 (2026-09-08)
 

src/constants.ts

@@ -4,17 +4,24 @@ import Utils from './utils/util';
  * A class containing constants used throughout the EasyPost Node.js client library.
  */
 export default class Constants {
-  static get CARRIER_ACCOUNTS_WITH_CUSTOM_CREATE_WORKFLOWS() {
-    return ['FedexAccount', 'FedexSmartpostAccount'];
-  }
-  static get CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_OAUTH() {
-    return [
-      'AmazonShippingAccount',
-      'UpsAccount',
-      'UpsMailInnovationsAccount',
-      'UpsSurepostAccount',
-      'UspsShipAccount',
-    ];
+  static get CARRIER_ACCOUNT_CREATE_ENDPOINT_TYPES() {
+    return {
+      'carrier_accounts/open': [
+        'FedexDefaultAccount',
+        'GofoWalletAccount',
+        'UpsDapAccount',
+        'UniUniWalletAccount',
+        'VehoWalletAccount',
+      ],
+      'carrier_accounts/register': ['FedexAccount', 'FedexSmartpostAccount'],
+      'carrier_accounts/register_oauth': [
+        'AmazonShippingAccount',
+        'UpsAccount',
+        'UpsMailInnovationsAccount',
+        'UpsSurepostAccount',
+        'UspsShipAccount',
+      ],
+    };
   }
   static EXTERNAL_API_CALL_FAILED = 'Communication with %s failed, please try again later';
   static INVALID_API_KEY_TYPE = 'Invalid API key type.';

src/services/carrier_account_service.ts

@@ -89,10 +89,10 @@ export default (easypostClient: EasyPostClient) =>
      * @returns {string} - The endpoint to be used for the carrier account creation request.
      */
     static _selectCarrierAccountCreationEndpoint(carrierAccountType: string): string {
-      if (Constants.CARRIER_ACCOUNTS_WITH_CUSTOM_CREATE_WORKFLOWS.includes(carrierAccountType)) {
-        return 'carrier_accounts/register';
-      } else if (Constants.CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_OAUTH.includes(carrierAccountType)) {
-        return 'carrier_accounts/register_oauth';
+      for (const [endpoint, carrierAccountTypes] of Object.entries(Constants.CARRIER_ACCOUNT_CREATE_ENDPOINT_TYPES)) {
+        if (carrierAccountTypes.includes(carrierAccountType)) {
+          return endpoint;
+        }
       }
 
       return 'carrier_accounts';
@@ -109,7 +109,8 @@ export default (easypostClient: EasyPostClient) =>
       carrierAccountType: string,
       params: Record<string, unknown>,
     ): Record<string, unknown> {
-      if (Constants.CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_OAUTH.includes(carrierAccountType)) {
+      const endpoint = this._selectCarrierAccountCreationEndpoint(carrierAccountType);
+      if (endpoint === 'carrier_accounts/register_oauth') {
         return { carrier_account_oauth_registrations: params };
       }