public Signature Sign(Model model)
{
var signer = new EthereumMessageSigner();
var hash = SoliditySHA3(model);
if (logger.IsEnabled(LogLevel.Debug))
{
logger.LogDebug("signing model {0} , {1} bytes", model, hash.ToHex().EnsureHexPrefix());
}
return(Signature.Of(signer.HashAndSign(hash, new EthECKey(privateKey))));
}
public async void SigningTestSimple()
{
// The message itself, this is what is being signed
var msg = "test message 1234567890";
//var privateKey = "0xb5b1870957d373ef0eeffecc6e4812c0fd08f554b37b233526acc331bf1544f7";
var web3 = new Web3(new Account(_privateKey), _blockchainUrl);
// SIGN. Doesnt need web3, done offline.
// In: Message, Signer Private Key
// Out: Signature (65 bytes)
Log("--- SIGN with Nethereum ---");
var signer = new EthereumMessageSigner();
var signature = signer.HashAndSign(msg, _privateKey);
Log($"signature: {signature} is for message: {msg}");
Log("");
// RECOVER with Nethereum
// In: Message, Signature
// Out: Signer Address
Log("--- RECOVER with Nethereum ---");
var signerAddressRecoveredNethereum = signer.HashAndEcRecover(msg, signature);
Log($"Actual Signer address using C# HashAndEcRecover: {signerAddressRecoveredNethereum}");
Log($"Expected Signer address: {web3.TransactionManager.Account.Address}"); // since web3 created using same private key as was used to sign
Log("");
// RECOVER with Solidity
// In: Message, Signature
// Out: Signer Address
Log("--- RECOVER with Solidity ---");
Log($"Deploying contract SignatureChecker...");
var signatureCheckerDeployment = new SignatureCheckerDeployment();
var signatureCheckerService = await SignatureCheckerService.DeployContractAndGetServiceAsync(web3, signatureCheckerDeployment);
Log($"SignatureChecker contract address is: {signatureCheckerService.ContractHandler.ContractAddress}");
var bytesForSignature = signature.HexToByteArray();
var signerAddressRecoveredSolidity = await signatureCheckerService.GetSignerAddressFromMessageAndSignatureQueryAsync(msg, bytesForSignature);
Log($"Actual Signer Address Recovered using Solidity: {signerAddressRecoveredSolidity}");
signerAddressRecoveredSolidity.Should().Be(signerAddressRecoveredNethereum.ToLowerInvariant());
// See Solidity code Channels\Channels.Contracts\Contracts\SignatureChecker.sol:
// // this recreates the message that was signed on the client
// bytes32 messageAsClient = prefixed(keccak256(abi.encodePacked(message)));
}
public void ShouldRecoverUsingShortcutHashes()
{
var signature = "0x0976a177078198a261faf206287b8bb93ebb233347ab09a57c8691733f5772f67f398084b30fc6379ffee2cc72d510fd0f8a7ac2ee0162b95dc5d61146b40ffa1c";
var text = "test";
var signer = new EthereumMessageSigner();
var account = signer.HashAndEcRecover(text, signature);
Assert.Equal("0x12890d2cce102216644c59dae5baed380d84830c", account.EnsureHexPrefix().ToLower());
signature = signer.HashAndSign(text,
"0xb5b1870957d373ef0eeffecc6e4812c0fd08f554b37b233526acc331bf1544f7");
account = signer.HashAndEcRecover(text, signature);
Assert.Equal("0x12890d2cce102216644c59dae5baed380d84830c".ToLower(), account.EnsureHexPrefix().ToLower());
}
/*
* When receiving a signature that has been made with a hashed
* file it’s necessary to start by hashing the file we want to verify and then recover the address that signed it.
*/
public void HashMsgRecover(EthereumMessageSigner LSigner)
{
if (LSigner != null)
{
//that code, will be refactor.. mmm
string FprivateKey = FCryptoCurrencyAdvocacy.GetPrivateKey(1);
var LSignature = LSigner.HashAndSign(Fmsg, FprivateKey);
//recover message
var addressRec2 = LSigner.HashAndEcRecover(Fmsg, LSignature);
}
else
{
throw new ArgumentNullException("Lsigner");
}
}
/*hashing message and then signing it.
* debo llamar esto desde el controlador, cierto luis?
*/
public void HashAndSign()
{
if (Fmsg != null)
{
string FprivateKey = FCryptoCurrencyAdvocacy.GetPrivateKey(1);
var LSigner = new EthereumMessageSigner();
var LSignature = LSigner.HashAndSign(Fmsg, FprivateKey);
//example "0xb5b1870957d373ef0eeffecc6e4812c0fd08f554b37b233526acc331bf1544f7");
HashMsgRecover(LSigner);
}
else
{
throw new ArgumentNullException("Fmsg");
}
}
/// <summary>
/// Encodes data according to EIP-712, hashes it and signs with <paramref name="key"/>.
/// </summary>
public string SignTypedData(TypedData typedData, EthECKey key)
{
var encodedData = EncodeTypedData(typedData);
return(_signer.HashAndSign(encodedData, key));
}
public static string Sign(string message, string privateKey)
{
return(MessageSigner.HashAndSign(message, privateKey));
}
public string HashAndSign(string privateKey, string message)
{
return(_signer.HashAndSign(message, privateKey));
}
public string SignMessage(byte[] message, string privateKey)
{
var signer = new EthereumMessageSigner();
return(signer.HashAndSign(message, new EthECKey(privateKey)));
}
/// <summary>
/// Encodes data according to EIP-712, hashes it and signs with <paramref name="key"/>.
/// </summary>
public string SignTypedData <TDomain>(TypedData <TDomain> typedData, EthECKey key) where TDomain : IDomain
{
var encodedData = EncodeTypedData(typedData);
return(_signer.HashAndSign(encodedData, key));
}
public async void SigningTestPo()
{
var web3 = new Web3(new Account(_privateKey), _blockchainUrl);
var po2 = new Po()
{
BuyerAddress = "0x40eD4f49EC2C7BDCCe8631B1A7b54ed5d4Aa9610",
PoNumber = 1,
ApproverAddress = "0x40eD4f49EC2C7BDCCe8631B1A7b54ed5d4Aa9610",
ReceiverAddress = "0x40eD4f49EC2C7BDCCe8631B1A7b54ed5d4Aa9610",
BuyerWalletAddress = "0x40eD4f49EC2C7BDCCe8631B1A7b54ed5d4Aa9610",
CurrencyAddress = "0x40eD4f49EC2C7BDCCe8631B1A7b54ed5d4Aa9610",
CurrencySymbol = "DAI",
PoType = PoType.Cash,
SellerId = "Nethereum.eShop",
PoCreateDate = 100,
PoItemCount = 2,
PoItems = new List <PoItem>()
{
new PoItem()
{
PoNumber = 1,
PoItemNumber = 10,
SoNumber = "so1",
SoItemNumber = "100",
ProductId = "gtin1111",
Quantity = 1,
Unit = "EA",
QuantitySymbol = "NA",
QuantityAddress = "0x40eD4f49EC2C7BDCCe8631B1A7b54ed5d4Aa9610",
CurrencyValue = 11,
Status = PoItemStatus.Created,
GoodsIssuedDate = 100,
GoodsReceivedDate = 0,
PlannedEscrowReleaseDate = 100,
ActualEscrowReleaseDate = 110,
IsEscrowReleased = false,
CancelStatus = PoItemCancelStatus.Initial
}
}
};
var encoded = new ABIEncode().GetABIEncoded(new ABIValue(new TupleType(), po2));
var hashEncoded = new ABIEncode().GetSha3ABIEncoded(new ABIValue(new TupleType(), po2));
var signed = new EthereumMessageSigner().Sign(hashEncoded, _privateKey);
var account2 = new Account(_privateKey);
// Prepare new PO
var po = CreatePo(1, "123", 1);
// SIGN. Doesnt need web3, done offline.
// In: Po, Signer Private Key
// Out: Signature (65 bytes)
Log("--- SIGN with Nethereum ---");
var abiEncoder = new ABIEncode();
var encodedValue = abiEncoder.GetABIEncoded(po);
var signer = new EthereumMessageSigner();
var signature = signer.HashAndSign(encodedValue, _privateKey);
Log($"signature: {signature} is for message: [byte array not shown here yet]");
Log("");
// RECOVER with Solidity
// In: Po, Signature
// Out: Signer Address
Log("--- RECOVER with Solidity ---");
Log($"Deploying contract SignatureChecker...");
var signatureCheckerDeployment = new SignatureCheckerDeployment();
var signatureCheckerService = await SignatureCheckerService.DeployContractAndGetServiceAsync(web3, signatureCheckerDeployment);
// See Solidity code Channels\Channels.Contracts\Contracts\SignatureChecker.sol:
var bytesForSignature = signature.HexToByteArray();
var signerAddressRecoveredSolidity = await signatureCheckerService.GetSignerAddressFromPoAndSignatureQueryAsync(
po, bytesForSignature);
Log($"Actual Signer Address Recovered using Solidity: {signerAddressRecoveredSolidity}");
Log($"Expected Signer address: {web3.TransactionManager.Account.Address}"); // since web3 created using same private key as was used to sign
signerAddressRecoveredSolidity.Should().Be(web3.TransactionManager.Account.Address);
}