Try to update decrypt method

Author: ghbutton

android/src/main/java/org/walletconnect/crypto/RCTAes.java

@@ -142,7 +142,7 @@ private static String decrypt(String ciphertext, String hexKey, String hexIv) th
         Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
         cipher.init(Cipher.DECRYPT_MODE, secretKey, hexIv == null ? emptyIvSpec : new IvParameterSpec(Hex.decode(hexIv)));
         byte[] decrypted = cipher.doFinal(Base64.decode(ciphertext, Base64.NO_WRAP));
-        return new String(decrypted, "UTF-8");
+        return Base64.encodeToString(decrypted, Base64.NO_WRAP)
     }
 
 }

index.js

@@ -111,7 +111,7 @@ const AES = {
     return new Promise((resolve, reject) => {
       NativeModules.Aes.decrypt(cipherTextBase64, keyHex, ivHex)
         .then(textString => {
-          const result = convertUtf8ToArrayBuffer(textString);
+          const result = convertBase64ToArrayBuffer(textString);
           resolve(result);
         })
         .catch(error => reject(error));

ios/RCTCrypto/lib/Aes.m

@@ -42,7 +42,7 @@ + (NSString *) encrypt: (NSString *)clearText64 key: (NSString *)key iv: (NSStri
 
 + (NSString *) decrypt: (NSString *)cipherText key: (NSString *)key iv: (NSString *)iv {
     NSData *result = [self AES128CBC:@"decrypt" data:[[NSData alloc] initWithBase64EncodedString:cipherText options:0] key:key iv:iv];
-    return [[NSString alloc] initWithData:result encoding:NSUTF8StringEncoding];
+    return [result base64EncodedStringWithOptions:0];
 }
 
 @end