fixed js thread issue from calling ethers package

context-store/rootstockSwapContext.js

@@ -125,7 +125,7 @@ export const RootstockSwapProvider = ({ children }) => {
     );
   }, []);
 
-  const createSigner = useCallback(async () => {
+  const createSigner = useCallback(() => {
     try {
       console.log('PROCESSS WALLET', new Date().getTime());
       const wallet = Wallet.fromPhrase(accountMnemoinc);

pollyfills.js

@@ -5,12 +5,33 @@ import 'react-native-gesture-handler';
 import '@azure/core-asynciterator-polyfill';
 //neeed for encription + spark
 import 'react-native-quick-base64';
-import {Buffer} from '@craftzdog/react-native-buffer';
+import { Buffer } from '@craftzdog/react-native-buffer';
+import { pbkdf2Sync, createHash } from 'react-native-quick-crypto';
 global.Buffer = Buffer;
 
 // import 'text-encoding-polyfill';
 import 'text-encoding'; // needed for spark
 
+//Fixing js blocking from ethers package
+import { ethers } from 'ethers';
+
+// --- Register native SHA512 implementation ---
+ethers.sha512.register(data => {
+  return Uint8Array.from(createHash('sha512').update(data).digest());
+});
+
+// --- Register native PBKDF2 implementation ---
+ethers.pbkdf2.register((password, salt, iterations, keyLen, algo) => {
+  const derivedKey = pbkdf2Sync(
+    Buffer.from(password),
+    Buffer.from(salt),
+    iterations,
+    keyLen,
+    algo.toLowerCase(),
+  );
+  return Uint8Array.from(derivedKey);
+});
+
 // Process polyfill
 global.process = global.process || {};
 global.process.env = global.process.env || {};