decrypt method
Implementation
String decrypt(String message, String stringSenderPubKey) {
final Uint8List msg = base64.decode(message);
final List<int> hexSenderPubKey = HEX.decode(stringSenderPubKey);
final Uint8List uintSenderPubKey = Uint8List.fromList(hexSenderPubKey);
final senderPk = PublicKey(uintSenderPubKey);
final box = Box(myPrivateKey: privateKey, theirPublicKey: senderPk);
final decrypted = box.decrypt(EncryptedMessage.fromList(msg));
return utf8.decode(decrypted);
}