Add branta (#845)

* adding translations

* adding branta

* implemtn branta with pollyfill

* improve pollyfill

* change function name

pollyfills.js

@@ -5,10 +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 { pbkdf2Sync, createHash } from 'react-native-quick-crypto';
+import QuickCrypto, {
+  pbkdf2Sync,
+  createHash,
+  subtle,
+} from 'react-native-quick-crypto';
 global.Buffer = Buffer;
 
+// Polyfill Web Crypto API for packages that rely on crypto.subtle (e.g. @branta-ops/branta)
+// react-native-get-random-values (imported above) already provides crypto.getRandomValues
+// need for @branta-ops/branta
+global.crypto = QuickCrypto;
+global.crypto.subtle = subtle;
+global.crypto.randomUUID =
+  global.crypto.randomUUID ||
+  function () {
+    const bytes = new Uint8Array(16);
+    global.crypto.getRandomValues(bytes);
+    bytes[6] = (bytes[6] & 0x0f) | 0x40;
+    bytes[8] = (bytes[8] & 0x3f) | 0x80;
+    const hex = Array.from(bytes, b => b.toString(16).padStart(2, '0'));
+    return `${hex.slice(0, 4).join('')}-${hex.slice(4, 6).join('')}-${hex
+      .slice(6, 8)
+      .join('')}-${hex.slice(8, 10).join('')}-${hex.slice(10).join('')}`;
+  };
+
 // import 'text-encoding-polyfill';
 import 'text-encoding'; // needed for spark