fix: use custom fetch ponyfill

README.md

@@ -85,4 +85,3 @@ This library would not be possible without these rockstars.
 Copyright (c) 2022 0xs34n
 
 Licensed under the [MIT license](https://github.com/0xs34n/starknet.js/blob/main/LICENSE).
-

__tests__/jest.setup.ts

@@ -1,6 +1,6 @@
-/* eslint-disable no-console */
-import 'isomorphic-unfetch';
+import 'isomorphic-fetch';
 
+/* eslint-disable no-console */
 import { register } from 'fetch-intercept';
 
 jest.setTimeout(50 * 60 * 1000);

package.json

@@ -70,7 +70,7 @@
     "elliptic": "^6.5.4",
     "ethereum-cryptography": "^1.0.3",
     "hash.js": "^1.1.7",
-    "isomorphic-unfetch": "^3.1.0",
+    "isomorphic-fetch": "^3.0.0",
     "json-bigint": "^1.0.0",
     "minimalistic-assert": "^1.0.1",
     "pako": "^2.0.4",

src/provider/default.ts

@@ -1,4 +1,3 @@
-import fetch from 'isomorphic-unfetch';
 import urljoin from 'url-join';
 
 import { ONE, StarknetChainId, ZERO } from '../constants';
@@ -20,6 +19,7 @@ import {
   Invocation,
   TransactionReceiptResponse,
 } from '../types';
+import fetch from '../utils/fetchPonyfill';
 import { getSelectorFromName } from '../utils/hash';
 import { parse, parseAlwaysAsBig, stringify } from '../utils/json';
 import { BigNumberish, bigNumberishArrayToDecimalStringArray, toBN, toHex } from '../utils/number';

src/utils/fetchPonyfill.ts

@@ -0,0 +1,4 @@
+export default (typeof window !== 'undefined' && window.fetch) || // use buildin fetch in browser if available
+  (typeof global !== 'undefined' && global.fetch) || // use buildin fetch in node, react-native and service worker if available
+  // eslint-disable-next-line global-require
+  require('isomorphic-fetch'); // ponyfill fetch in node and browsers that don't have it