private AdaptorSignature SignCET(Key key, DLCOutcome outcome)
{
if (OracleInfo is null)
{
throw new InvalidOperationException("Invalid state for signing CET");
}
var cet = BuildCET(outcome);
var hash = cet.GetSignatureHash(GetFundCoin());
if (!OracleInfo.TryComputeSigpoint(outcome, out var sigpoint) || sigpoint is null)
{
throw new InvalidOperationException("TryComputeSigpoint failed");
}
if (!key.ToECPrivKey().TrySignAdaptor(hash.ToBytes(), sigpoint, out var sig, out var proof) || sig is null || proof is null)
{
throw new InvalidOperationException("TrySignAdaptor failed");
}
return(new AdaptorSignature(sig, proof));
}
public Transaction BuildCET(DLCOutcome outcome)
{
if (Timeouts is null ||
Offerer?.Collateral is null ||
Acceptor?.Collateral is null ||
Offerer?.Payout is null ||
Acceptor?.Payout is null ||
Timeouts is null ||
OffererRewards is null)
{
throw new InvalidOperationException("We did not received enough data to create the refund");
}
if (!OffererRewards.TryGetValue(outcome, out var offererPayout) || offererPayout is null)
{
throw new InvalidOperationException("Invalid outcome");
}
var funding = BuildFunding();
Transaction tx = network.CreateTransaction();
tx.Version = 2;
tx.LockTime = Timeouts.ContractMaturity;
tx.Inputs.Add(new OutPoint(funding.GetHash(), 0), sequence: 0xFFFFFFFE);
var collateral = Offerer.Collateral + Acceptor.Collateral;
tx.Outputs.Add(offererPayout, Offerer.Payout);
tx.Outputs.Add(collateral - offererPayout, Acceptor.Payout);
foreach (var output in tx.Outputs.ToArray())
{
if (output.Value < Money.Satoshis(1000))
{
tx.Outputs.Remove(output);
}
}
return(tx);
}
public bool TryComputeSigpoint(DLCOutcome outcome, out ECPubKey?sigpoint)
{
return(PubKey.TryComputeSigPoint(outcome.Hash, RValue, out sigpoint));
}
