fix: builder handler types, thanks for pairing with me matt kane :)

Author: Emily Zhang

src/function/handler.ts

@@ -2,20 +2,14 @@ import type { Context } from './context'
 import type { Event } from './event'
 import type { Response, BuilderResponse } from './response'
 
-export interface HandlerCallback {
+export interface HandlerCallback<TResponse> {
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  (error: any, response: Response): void
+  (error: any, response: TResponse): void
 }
 
-export interface Handler {
-  (event: Event, context: Context, callback: HandlerCallback): void | Response | Promise<Response>
+interface BaseHandler<TResponse> {
+  (event: Event, context: Context, callback: HandlerCallback<TResponse>): void | TResponse | Promise<TResponse>
 }
 
-export interface BuilderCallback {
-  // eslint-disable-next-line @typescript-eslint/no-explicit-any
-  (error: any, response: BuilderResponse): void
-}
-
-export interface BuilderHandler {
-  (event: Event, context: Context, callback: BuilderCallback): void | BuilderResponse | Promise<BuilderResponse>
-}
+export type Handler = BaseHandler<Response>
+export type BuilderHandler = BaseHandler<BuilderResponse>

src/lib/builder.ts

@@ -1,6 +1,6 @@
 import isPromise from 'is-promise'
 
-import { BuilderHandler } from '../function/handler'
+import { BuilderHandler, Handler } from '../function/handler'
 import { BuilderResponse } from '../function/response'
 
 import { BUILDER_FUNCTIONS_FLAG, HTTP_STATUS_METHOD_NOT_ALLOWED, HTTP_STATUS_OK, METADATA_VERSION } from './consts'
@@ -18,7 +18,7 @@ const augmentResponse = (response: BuilderResponse) => {
 }
 
 const wrapHandler =
-  (handler: BuilderHandler): BuilderHandler =>
+  (handler: BuilderHandler): Handler =>
   // eslint-disable-next-line promise/prefer-await-to-callbacks
   (event, context, callback) => {
     if (event.httpMethod !== 'GET' && event.httpMethod !== 'HEAD') {