public virtual void Sign(EthereumEcdsa localPrivateKey, EthereumEcdsa ephemeralPrivateKey, EthereumEcdsa receiverPublicKey, uint?chainID = null)
{
// Generate the shared secret using ECDH between our local private key and this remote public key
byte[] ecdhKey = localPrivateKey.ComputeECDHKey(receiverPublicKey);
// If our nonce is null, generate a new one
Nonce = Nonce ?? RLPxSession.GenerateNonce();
// Verify the nonce is the correct length.
if (Nonce.Length != RLPxSession.NONCE_SIZE)
{
// Throw an exception if an invalid nonce was provided.
throw new ArgumentException($"Invalid size nonce provided for RLPx session when signing auth message. Should be {RLPxSession.NONCE_SIZE} bytes but was {Nonce?.Length}.");
}
// Obtain our transformed nonce data.
byte[] transformedNonceData = GetTransformedNonce(ecdhKey);
// Sign the transformed data.
var signature = ephemeralPrivateKey.SignData(transformedNonceData);
// We want our signature in r,s,v format.
R = BigIntegerConverter.GetBytes(signature.r, 32);
S = BigIntegerConverter.GetBytes(signature.s, 32);
V = EthereumEcdsa.GetVFromRecoveryID(chainID, signature.RecoveryID);
// Set our local public key and the public key hash.
PublicKey = localPrivateKey.ToPublicKeyArray(false, true);
}
public static (BigInteger R, BigInteger S, byte V) Sign(EthereumEcdsa privateKey, BigInteger nonce, BigInteger gasPrice, BigInteger gasLimit, Address?to, BigInteger value, byte[] data, uint?chainID)
{
// Obtain our transaction hash to sign.
byte[] hash = GetUnsignedHash(nonce, gasPrice, gasLimit, to, value, data, chainID);
// Sign our data
(byte RecoveryID, BigInteger r, BigInteger s)signature = privateKey.SignData(hash);
// Set our r and s components.
var r = signature.r;
var s = signature.s;
// Obtain our v parameter from recovery ID and set it
var v = EthereumEcdsa.GetVFromRecoveryID(chainID, signature.RecoveryID);
return(r, s, v);
}
