feat: more specific typings

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# On branch master
# Your branch is up to date with 'origin/master'.
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# Changes to be committed:
#	modified:   package.json
#	modified:   src/server/index.ts
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#	.DS_Store
#	.vscode/decentraland-server.code-workspace
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package.json

@@ -5,7 +5,7 @@
   "main": "./dist/index.js",
   "typings": "./dist/index.d.ts",
   "scripts": {
-    "docs": "npx jsdoc -c conf.json -r src/**/*",
+    "docs": "jsdoc -c conf.json -r src/**/*",
     "lint": "tslint -p src/tsconfig.json",
     "lint:fix": "tslint -p src/tsconfig.json --fix",
     "init": "mkdir -p dist",

src/server/index.ts

@@ -22,6 +22,9 @@ export function useRollbar(accessToken: string): void {
  * @param callback - Actual handler, the return value will be used as response to the client. It will receive (req, res) as parameters
  * @return - Wrapper function
  */
+export function handleRequest<T = Request, U = Response>(
+  callback: (req: T, res: U) => any
+): RequestHandler
 export function handleRequest(
   callback: (req: Request, res: Response) => any
 ): RequestHandler {
@@ -47,8 +50,8 @@ export function handleRequest(
  * @param param - Searched param
  * @return - The param value, it throws if it's not present
  */
-export function extractFromReq(req: Request, param: string): string {
-  let value = ''
+export function extractFromReq<T = string>(req: Request, param: string): T {
+  let value
 
   if (req.query[param]) {
     value = req.query[param]