protected override async Task InvokeAsyncBase(InvocationContext context)
{
var name = context.ParseResult.CommandResult.GetArgumentValueOrDefault <string>("name")?.Trim();
if (name is null)
{
throw new CommandOptionRequiredException("name");
}
var dlc = await GetDLC("name", name);
if (dlc?.OracleInfo is null)
{
throw new CommandException("name", "This DLC does not exist");
}
if (dlc.BuilderState is null || dlc.FundKeyPath is null)
{
throw new CommandException("name", "This DLC is not in the right state to get executed");
}
var evt = await Repository.GetEvent(dlc.OracleInfo.PubKey, dlc.OracleInfo.RValue);
var attestation = context.ParseResult.CommandResult.GetArgumentValueOrDefault <string>("attestation")?.Trim();
Key oracleKey;
try
{
if (attestation is null)
{
var k = evt?.Attestations?.Select(o => o.Value).FirstOrDefault();
if (k is null)
{
throw new CommandOptionRequiredException("attestation");
}
oracleKey = k;
}
else
{
oracleKey = new Key(Encoders.Hex.DecodeData(attestation));
}
}
catch (CommandOptionRequiredException)
{
throw;
}
catch
{
throw new CommandException("attestation", "Cannot parse the attestation");
}
var builder = new DLCTransactionBuilder(dlc.BuilderState.ToString(), Network);
var key = await Repository.GetKey(dlc.FundKeyPath);
try
{
var execution = builder.Execute(key, oracleKey);
if (evt is Repository.Event)
{
await Repository.AddAttestation(dlc.OracleInfo, oracleKey);
}
context.WriteTransaction(execution.CET, Network);
}
catch (Exception ex)
{
throw new CommandException("attestation", $"Error while building the CET. ({ex.Message})");
}
}
public void FullExchange2()
{
var initiatorInputKey = new Key();
var acceptorInputKey = new Key();
var offerKey = new Key();
var acceptKey = new Key();
var initiator = new DLCTransactionBuilder(true, null, null, null, Network.RegTest);
var acceptor = new DLCTransactionBuilder(false, null, null, null, Network.RegTest);
var oracleInfo = OracleInfo.Parse("e4d36e995ff4bba4da2b60ad907d61d36e120d6f7314a3c2a20c6e27a5cd850ff67f8f41718c86f05eb95fab308f5ed788a2a963124299154648f97124caa579");
var requiredCollateral = initiator.Offer(oracleInfo.PubKey, oracleInfo.RValue,
new DiscretePayoffs()
{
new DiscretePayoff("Republicans", Money.Coins(0.4m)),
new DiscretePayoff("Democrats", -Money.Coins(0.6m)),
new DiscretePayoff("Smith", Money.Zero)
}, new Timeouts()
{
ContractMaturity = 100,
ContractTimeout = 200
});
var fund1 = GetFundingPSBT(acceptorInputKey, requiredCollateral);
var offer = initiator.FundOffer(offerKey, fund1);
var payoff = acceptor.Accept(offer);
var fund2 = GetFundingPSBT(initiatorInputKey, payoff.CalculateMinimumCollateral());
var accept = acceptor.FundAccept(acceptKey, fund2);
initiator.Sign1(accept);
var fundPSBT = initiator.GetFundingPSBT();
fundPSBT.SignWithKeys(initiatorInputKey);
var sign = initiator.Sign2(offerKey, fundPSBT);
acceptor.Finalize1(sign);
fundPSBT = acceptor.GetFundingPSBT();
fundPSBT.SignWithKeys(acceptorInputKey);
var fullyVerified = acceptor.Finalize(fundPSBT);
foreach (var i in fullyVerified.Inputs)
{
Assert.NotNull(i.WitScript);
}
var cet = initiator.BuildCET(offer.ContractInfo[0].Outcome);
var keyBytes = Encoders.Hex.DecodeData("d1da46f96f0be50bce2bbabe6bc8633f448ec3f1d14715a0b086b68ed34e095d");
var oracleSecret = new Key(keyBytes);
var sig = oracleInfo.RValue.CreateSchnorrSignature(oracleSecret.ToECPrivKey());
Assert.True(oracleInfo.PubKey.SigVerifyBIP340(sig, new DiscreteOutcome("Republicans").Hash));
var execution = initiator.Execute(offerKey, oracleSecret);
// Can extract?
initiator.ExtractAttestation(execution.CET);
acceptor.ExtractAttestation(execution.CET);
this.testOutputHelper.WriteLine("----Final state------");
testOutputHelper.WriteLine(JObject.Parse(initiator.ExportState()).ToString(Formatting.Indented));
this.testOutputHelper.WriteLine("---------------------");
}