/// <summary>
/// Encodes data according to EIP-712, hashes it and signs with <paramref name="key"/>.
/// Matches the signature produced by eth_signTypedData_v4
/// </summary>
public string SignTypedDataV4(TypedData typedData, EthECKey key)
{
var encodedData = EncodeTypedData(typedData);
var signature = key.SignAndCalculateV(Sha3Keccack.Current.CalculateHash(encodedData));
return(EthECDSASignature.CreateStringSignature(signature));
}
/// <summary>
/// Signs using a predefined typed data schema and converts and encodes the provide the message value
/// </summary>
public string SignTypedDataV4 <T, TDomain>(T message, TypedData <TDomain> typedData, EthECKey key) where TDomain : IDomain
{
var encodedData = EncodeTypedData(message, typedData);
var signature = key.SignAndCalculateV(Sha3Keccack.Current.CalculateHash(encodedData));
return(EthECDSASignature.CreateStringSignature(signature));
}
public EthECDSASignature Sign(string contract, string makerAddress, string makerToken,
string takerToken, string makerAmount, string takerAmount, string expires, string nonce)
{
var plainData = new Object[]
{
contract,
takerToken,
BigInteger.Parse(takerAmount),
makerToken,
BigInteger.Parse(makerAmount),
BigInteger.Parse(expires),
BigInteger.Parse(nonce)
};
var prms = new[] {
new Parameter("address", 1),
new Parameter("address", 1),
new Parameter("uint256", 1),
new Parameter("address", 1),
new Parameter("uint256", 1),
new Parameter("uint256", 1),
new Parameter("uint256", 1)
};
var data = SolidityPack(plainData, prms);
var keystoreCrypto = new KeyStoreCrypto();
//for etherDelta its SHA256, for IDEX just change with SHA3
var hashed = keystoreCrypto.CalculateSha256Hash(data);
var signer = new EthereumMessageSigner();
var newHash = signer.HashPrefixedMessage(hashed);
var signatureRaw = signer.SignAndCalculateV(newHash, _userDataProvider.PrivateKey);
var signature = EthECDSASignature.CreateStringSignature(signatureRaw);
var probe = signer.EcRecover(hashed, signature);
var ethEcdsa = MessageSigner.ExtractEcdsaSignature(signature);
if (probe == makerAddress)
{
return(ethEcdsa);
}
//depending on usage, but it would be better to throw exc here if fails
return(null);
//throw new Exception("Signing failed");
}
/*
* deposit
* van
* crouch
* super
* viable
* electric
* bamboo
* nephew
* hold
* whip
* nation
* ankle
* wonder
* bottom
* win
* bomb
* dog
* search
* globe
* shrug
* primary
* spy
* limb
* knock
*/
public static async Task TestMessageSigning()
{
using (var trezorManager = await TrezorFactory.GetWindowsConnectedLedgerManagerAsync(GetPin))
{
await trezorManager.InitializeAsync();
var signer = new TrezorExternalSigner(trezorManager, 0);
var address = await signer.GetAddressAsync();
var messageSignature = await signer.SignAsync(Encoding.UTF8.GetBytes("Hello"));
var nethereumMessageSigner = new Nethereum.Signer.EthereumMessageSigner();
var nethereumMessageSignature = nethereumMessageSigner.EncodeUTF8AndSign("Hello", new EthECKey(
"0x2e14c29aaecd1b7c681154d41f50c4bb8b6e4299a431960ed9e860e39cae6d29"));
System.Console.WriteLine("Trezor: " + EthECDSASignature.CreateStringSignature(messageSignature));
System.Console.WriteLine("Nethereum: " + nethereumMessageSignature);
}
}
public static string GetSignature(byte[] output)
{
using (var memory = new MemoryStream(output))
{
using (var reader = new BinaryReader(memory))
{
byte[] sigV = reader.ReadBytes(1);
byte[] sigR = reader.ReadBytes(32);
byte[] sigS = reader.ReadBytes(32);
var signature = new EthECDSASignature(
new Org.BouncyCastle.Math.BigInteger(sigR),
new Org.BouncyCastle.Math.BigInteger(sigS),
sigV);
return(EthECDSASignature.CreateStringSignature(signature));
}
}
}
