vrfVerify method

Implementation

@override
bool vrfVerify(
  List<int> message,
  List<int> vrfSign, {
  List<int>? context,
  List<int>? extra,
}) {
  if (vrfSign.length != _SubstrateEcdsaSignerCons.vrfLength) {
    throw ArgumentException.invalidOperationArguments(
      "vrfVerify",
      name: "vrfSign",
      reason: "Invalid vrf signature bytes length.",
    );
  }
  final List<int> signature = vrfSign.sublist(
    QuickCrypto.blake2b256DigestSize,
  );
  final verifySignature = verify(message, signature);

  if (verifySignature) {
    final vrfHash = vrfSign.sublist(0, QuickCrypto.blake2b256DigestSize);
    final vrf = QuickCrypto.blake2b256Hash([
      ...context?.asBytes ?? [],
      ...extra?.asBytes ?? [],
      ...signature,
    ]);
    return BytesUtils.bytesEqual(vrf, vrfHash);
  }
  return false;
}