public static bool VerifySignature(uint256 message, UnblindedSignature signature, PubKey signerPubKey)
{
if (!Context.Instance.TryCreatePubKey(signerPubKey.ToBytes(), out var signerECPubkey))
{
throw new FormatException("Invalid signer pubkey.");
}
var P = signerECPubkey.Q;
var sG = (signature.S * EC.G).ToGroupElement();
var cP = P * signature.C;
var R = cP + sG;
var t = R.ToGroupElement().x.Normalize();
using var sha = new SHA256();
Span <byte> tmp = stackalloc byte[32];
message.ToBytes(tmp, false);
sha.Write(tmp);
t.WriteToSpan(tmp);
sha.Write(tmp);
sha.GetHash(tmp);
return(new Scalar(tmp) == signature.C);
}
public bool VerifyUnblindedSignature(UnblindedSignature signature, byte[] data)
{
var hash = new uint256(Hashes.SHA256(data));
return(SchnorrBlinding.VerifySignature(hash, signature, Key.PubKey));
}
public bool VerifyUnblindedSignature(UnblindedSignature signature, uint256 dataHash)
{
return(SchnorrBlinding.VerifySignature(dataHash, signature, Key.PubKey));
}
