pass search params to api call

lib/api/getSearchParams.ts

+import type { NextApiRequest } from 'next';
+
+export default function getSearchParams(req: NextApiRequest) {
+  const searchParams: Record<string, string> = {};
+  Object.entries(req.query).forEach(([ key, value ]) => {
+    searchParams[key] = Array.isArray(value) ? value.join(',') : (value || '');
+  });
+
+  return new URLSearchParams(searchParams).toString();
+}

pages/api/blocks/[id]/transactions.ts

 import type { NextApiRequest } from 'next';
 
+import getSearchParams from 'lib/api/getSearchParams';
 import handler from 'lib/api/handler';
 
 const getUrl = (req: NextApiRequest) => {
-  return `/v2/blocks/${ req.query.id }/transactions`;
+  const searchParamsStr = getSearchParams(req);
+  return `/v2/blocks/${ req.query.id }/transactions${ searchParamsStr ? '?' + searchParamsStr : '' }`;
 };
 
 const requestHandler = handler(getUrl, [ 'GET' ]);

pages/api/transactions/index.ts

 import type { NextApiRequest } from 'next';
 
+import getSearchParams from 'lib/api/getSearchParams';
 import handler from 'lib/api/handler';
 
 const getUrl = (req: NextApiRequest) => {
-  const searchParams: Record<string, string> = {};
-  Object.entries(req.query).forEach(([ key, value ]) => {
-    searchParams[key] = Array.isArray(value) ? value.join(',') : (value || '');
-  });
-  const searchParamsStr = new URLSearchParams(searchParams).toString();
+  const searchParamsStr = getSearchParams(req);
   return `/v2/transactions/${ searchParamsStr ? '?' + searchParamsStr : '' }`;
 };