Commerce react sdk strengthen some types (#3589)

* strenthen custom endpoint types and fix fetchOpts types errors

Author: alexvuong

packages/commerce-sdk-react/CHANGELOG.md

@@ -1,5 +1,6 @@
 ## v4.4.0-dev (Dec 17, 2025)
 - [Bugfix]Ensure code_verifier can be optional in resetPassword call [#3567](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3567)
+- [Improvement] Strengthening typescript types on custom endpoint options and fetchOptions types [#3589](https://github.com/SalesforceCommerceCloud/pwa-kit/pull/3589)
 
 ## v4.3.0 (Dec 17, 2025)
 

packages/commerce-sdk-react/src/auth/index.test.ts

@@ -1184,7 +1184,7 @@ describe('Auth service sends credentials fetch option to the ShopperLogin API',
         const configWithFetchOptions = {
             ...config,
             fetchOptions: {
-                credentials: 'include'
+                credentials: 'include' as RequestCredentials
             }
         }
         const auth = new Auth(configWithFetchOptions)
@@ -1213,7 +1213,7 @@ describe('Auth service sends credentials fetch option to the ShopperLogin API',
         const configWithFetchOptions = {
             ...config,
             fetchOptions: {
-                cache: 'no-cache'
+                cache: 'no-cache' as RequestCache
             }
         }
         const auth = new Auth(configWithFetchOptions)

packages/commerce-sdk-react/src/hooks/helpers.ts

@@ -7,7 +7,7 @@
 import Auth from '../auth'
 import {CommerceApiProviderProps} from '../provider'
 import {Logger} from '../types'
-import {OptionalCustomEndpointClientConfig, TMutationVariables} from './types'
+import {CustomEndpointArg, OptionalCustomEndpointClientConfig, TMutationVariables} from './types'
 
 /**
  * A helper function for handling bad responses from SCAPI when an invalid access token is used.
@@ -37,7 +37,7 @@ export const generateCustomEndpointOptions = (
     config: Omit<CommerceApiProviderProps, 'children'>,
     access_token: string,
     args?: TMutationVariables
-) => {
+): CustomEndpointArg => {
     const globalHeaders = config.headers || {}
     const globalClientConfig = {
         parameters: {

packages/commerce-sdk-react/src/hooks/types.ts

@@ -216,7 +216,7 @@ export type CacheUpdateMatrix<Client extends ApiClient> = {
         : never
 }
 
-type CustomEndpointArg = Parameters<typeof helpers.callCustomEndpoint>[0]
+export type CustomEndpointArg = Parameters<typeof helpers.callCustomEndpoint>[0]
 type CustomEndpointArgClientConfig = CustomEndpointArg['clientConfig']
 // The commerce-sdk-isomorphic custom endpoint helper REQUIRES clientConfig as mandatory argument
 // But we inject the configs for users from the provider, so this custom type is created