verify static method
Implementation
static bool verify(
    Uint8List publicKey, String signedMessage, String message) {
  Signature signature = Signature.fromHex(signedMessage);
  final PublicKey pubKey = PublicKey.fromHex(dynamicToString(publicKey));
  final result =
      Sr25519.verify(pubKey, signature, dynamicToUint8List(message));
  return result.$1;
}