fix: correct type references in API handler and request handler for consistency

Author: MattCCC

README.md

@@ -2235,7 +2235,7 @@ interface AddBookRequest {
   body: AddBookRequestBody;
 }
 
-const { data: bookAddedData } = await fetchff<AddBookRequest>('/api/add-book', {
+const { data: bookAddedData } = await fetchf<AddBookRequest>('/api/add-book', {
   method: 'POST',
 });
 // Your bookAddedData is of type AddBookResponseData

src/types/api-handler.ts

@@ -74,10 +74,10 @@ export type Endpoint<T extends DefaultRequestTypes = DefaultRequestTypes> =
 
 // Helper to support 4 generics
 export type EndpointReq<
-  ResponseData = DefaultResponse,
-  RequestBody = DefaultPayload,
-  QueryParams = DefaultParams,
-  UrlPathParams = DefaultUrlParams,
+  ResponseData extends DefaultResponse | undefined = DefaultResponse,
+  RequestBody extends DefaultPayload | undefined = DefaultPayload,
+  QueryParams extends DefaultParams | undefined = DefaultParams,
+  UrlPathParams extends DefaultUrlParams | undefined = DefaultUrlParams,
 > = Endpoint<Req<ResponseData, RequestBody, QueryParams, UrlPathParams>>;
 
 type MergeEndpointShape<

src/types/request-handler.ts

@@ -67,7 +67,7 @@ export type Req<
 
 export type DefaultRequestTypes = {
   response?: DefaultResponse;
-  body?: BodyPayload;
+  body?: DefaultPayload;
   params?: QueryParams;
   urlPathParams?: UrlPathParams;
 };