feat: adds support for carrier open endpoint

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Removes the deprecated, unusable `addCreditCardToUser` 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.
 
 ## v8.8.0 (2026-06-25)
 

src/main/java/com/easypost/Constants.java

@@ -2,6 +2,7 @@
 
 import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 import com.easypost.exception.APIException;
 import com.easypost.http.HashMapSerializer;
@@ -15,6 +16,7 @@
 import com.easypost.model.Webhook;
 import com.easypost.model.WebhookDeserializer;
 import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
 import com.google.gson.FieldNamingPolicy;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
@@ -61,12 +63,14 @@ public abstract static class ErrorCodes {
     }
 
     public abstract static class CarrierAccountTypes {
-        public static final List<String> CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_WORKFLOW = ImmutableList.of(
-                "FedexAccount", "FedexSmartpostAccount");
-
-        public static final List<String> CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_OAUTH = ImmutableList.of(
-                "AmazonShippingAccount", "UpsAccount", "UpsMailInnovationsAccount", "UpsSurepostAccount",
-                "UspsShipAccount");
+        public static final Map<String, List<String>> CARRIER_ACCOUNT_CREATE_ENDPOINT_TYPES = ImmutableMap.of(
+                "carrier_accounts/open", ImmutableList.of(
+                        "FedexDefaultAccount", "GofoWalletAccount", "UpsDapAccount", "UniUniWalletAccount",
+                        "VehoWalletAccount"),
+                "carrier_accounts/register", ImmutableList.of("FedexAccount", "FedexSmartpostAccount"),
+                "carrier_accounts/register_oauth", ImmutableList.of(
+                        "AmazonShippingAccount", "UpsAccount", "UpsMailInnovationsAccount", "UpsSurepostAccount",
+                        "UspsShipAccount"));
     }
 
     public abstract static class Http {

src/main/java/com/easypost/service/CarrierAccountService.java

@@ -33,9 +33,14 @@ public class CarrierAccountService {
      */
     public CarrierAccount create(final Map<String, Object> params) throws EasyPostException {
         String type = (String) params.get("type");
-        Map<String, Object> wrappedParams = new HashMap<String, Object>();
-        wrappedParams.put(selectTopLayerKey(type), params);
+        if (type == null) {
+            throw new MissingParameterError(
+                    String.format(Constants.ErrorMessages.MISSING_REQUIRED_PARAMETER, "carrier account type"));
+        }
+
         String endpoint = selectCarrierAccountCreationEndpoint(type);
+        Map<String, Object> wrappedParams = new HashMap<String, Object>();
+        wrappedParams.put(selectTopLayerKey(endpoint), params);
 
         return Requestor.request(RequestMethod.POST, endpoint, wrappedParams, CarrierAccount.class, client);
     }
@@ -116,30 +121,25 @@ public void delete(String id) throws EasyPostException {
      * @return The endpoint for the carrier account creation request.
      */
     private static String selectCarrierAccountCreationEndpoint(final String carrierAccountType) {
-        if (Constants.CarrierAccountTypes.CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_WORKFLOW.contains(carrierAccountType)) {
-            return "carrier_accounts/register";
-        } else if (Constants.CarrierAccountTypes.CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_OAUTH.contains(carrierAccountType)) {
-            return "carrier_accounts/register_oauth";
-        } else {
-            return "carrier_accounts";
+        for (Map.Entry<String, List<String>> entry : Constants.CarrierAccountTypes.CARRIER_ACCOUNT_CREATE_ENDPOINT_TYPES
+                .entrySet()) {
+            if (entry.getValue().contains(carrierAccountType)) {
+                return entry.getKey();
+            }
         }
+
+        return "carrier_accounts";
     }
 
     /**
      * Select the top-layer key for the carrier account creation/update request based on the
      * carrier type.
      *
-     * @param carrierAccountType The type of carrier account to create.
+     * @param carrierAccountEndpoint The endpoint of carrier account to create.
      * @return The top-layer key for the carrier account creation/update request.
-     * @throws MissingParameterError when the request fails.
      */
-    private static String selectTopLayerKey(final String carrierAccountType) throws MissingParameterError {
-        if (carrierAccountType == null) {
-            throw new MissingParameterError(
-                    String.format(Constants.ErrorMessages.MISSING_REQUIRED_PARAMETER, "carrier account type"));
-        }
-
-        if (Constants.CarrierAccountTypes.CARRIER_ACCOUNT_TYPES_WITH_CUSTOM_OAUTH.contains(carrierAccountType)) {
+    private static String selectTopLayerKey(final String carrierAccountEndpoint) {
+        if ("carrier_accounts/register_oauth".equals(carrierAccountEndpoint)) {
             return "carrier_account_oauth_registrations";
         } else {
             return "carrier_account";