vrfVerify method

bool vrfVerify(
  1. List<int> message,
  2. List<int> vrfSign, {
  3. List<int>? context,
  4. List<int>? extra,
})

Implementation

bool vrfVerify(
  List<int> message,
  List<int> vrfSign, {
  List<int>? context,
  List<int>? extra,
}) {
  if (vrfSign.length != _SubstrateSr25519SignerConst.vrfResultLength &&
      vrfSign.length != SchnorrkelKeyCost.vrfProofLength) {
    throw ArgumentException.invalidOperationArguments(
      "vrfVerify",
      name: "vrfSign",
      reason: "Invalid vrf signature bytes length.",
    );
  }
  final MerlinTranscript script =
      _SubstrateSr25519SignerUtils.substrateVrfSignScript(message, context);
  VRFPreOut output;
  VRFProof proof;
  if (vrfSign.length == SchnorrkelKeyCost.vrfProofLength) {
    output = _signer.vrfInOut(script).toVRFPreOut();
    proof = VRFProof.fromBytes(vrfSign);
  } else {
    output = VRFPreOut(vrfSign.sublist(0, SchnorrkelKeyCost.vrfPreOutLength));
    proof = VRFProof.fromBytes(
      vrfSign.sublist(SchnorrkelKeyCost.vrfPreOutLength),
    );
  }
  return _signer.publicKey().vrfVerify(
    _SubstrateSr25519SignerUtils.substrateVrfSignScript(message, context),
    output,
    proof,
    verifyScript: _SubstrateSr25519SignerUtils.vrfScript(extra: extra),
  );
}