node-fetch wrapper

api/utils/fetch.ts

+import type { RequestInit, Response } from 'node-fetch';
+import nodeFetch from 'node-fetch';
+
+// first arg can be only a string
+// FIXME migrate to RequestInfo later
+export default function fetch(path: string, init?: RequestInit): Promise<Response> {
+  const headers = {
+    accept: 'application/json',
+    authorization: `Bearer ${ process.env.API_AUTHORIZATION_TOKEN }`,
+    'content-type': 'application/json',
+  }
+  const url = `https://${ process.env.API_HOST }${ process.env.API_BASE_PATH }${ path }`;
+
+  return nodeFetch(url, {
+    headers,
+    ...init,
+  })
+}

pages/api-helpers/getDefaultHeaders.ts

-export default function getDefaultHeaders() {
-  return {
-    accept: 'application/json',
-    authorization: `Bearer ${ process.env.API_AUTHORIZATION_TOKEN }`,
-    'content-type': 'application/json',
-  }
-}

pages/api-helpers/getUrl.ts

-export default function getUrl(path: string) {
-  return `https://${ process.env.API_HOST }${ process.env.API_BASE_PATH }${ path }`
-}

pages/api/account/private-tags/address/index.ts

 import type { NextApiRequest, NextApiResponse } from 'next'
-import fetch from 'node-fetch';
 
-import getDefaultHeaders from 'pages/api-helpers/getDefaultHeaders';
-import getUrl from 'pages/api-helpers/getUrl';
+import fetch from 'api/utils/fetch';
 
 export default async function handler(_req: NextApiRequest, res: NextApiResponse) {
-  const url = getUrl('/account/v1/user/tags/address');
+  const url = '/account/v1/user/tags/address';
 
   switch (_req.method) {
     case 'GET': {
-      const response = await fetch(url, {
-        method: 'GET',
-        headers: getDefaultHeaders(),
-      })
+      const response = await fetch(url)
       const data = await response.json();
 
       res.status(200).json(data)
@@ -22,7 +17,6 @@ export default async function handler(_req: NextApiRequest, res: NextApiResponse
     case 'POST': {
       const response = await fetch(url, {
         method: 'POST',
-        headers: getDefaultHeaders(),
         body: _req.body,
       })
       const data = await response.json();