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);
}
