public static ImmutableList <TimeSpan> SamplePoissonDelays(this TimeSpan timeFrame, int numberOfEvents)
{
using var random = new SecureRandom();
TimeSpan Sample(int milliseconds) =>
milliseconds <= 0 ? TimeSpan.Zero : TimeSpan.FromMilliseconds(random.GetInt(0, milliseconds));
return(Enumerable
.Range(0, numberOfEvents)
.Select(_ => 0.8 * Sample((int)timeFrame.TotalMilliseconds))
.OrderBy(t => t)
.ToImmutableList());
}
public static ImmutableList <DateTimeOffset> SamplePoisson(this TimeSpan timeFrame, int numberOfEvents)
{
var startTime = DateTimeOffset.UtcNow;
using var random = new SecureRandom();
TimeSpan Sample(int milliseconds) =>
milliseconds <= 0 ? TimeSpan.Zero : TimeSpan.FromMilliseconds(random.GetInt(0, milliseconds));
return(Enumerable
.Range(0, numberOfEvents)
.Select(_ => startTime + (0.8 * Sample((int)timeFrame.TotalMilliseconds)))
.OrderBy(t => t)
.ToImmutableList());
}
ProceedWithSigningStateAsync(uint256 roundId, ImmutableArray <AliceClient> registeredAliceClients, IEnumerable <TxOut> outputTxOuts, CancellationToken cancellationToken)
{
// Signing.
var roundState = await RoundStatusUpdater.CreateRoundAwaiter(roundId, Phase.TransactionSigning, cancellationToken).ConfigureAwait(false);
var remainingTime = roundState.CoinjoinState.Parameters.TransactionSigningTimeout - RoundStatusUpdater.Period;
var signingStateEndTime = DateTimeOffset.UtcNow + remainingTime;
CoinJoinClientProgress.SafeInvoke(this, new EnteringSigningPhase(roundState, signingStateEndTime));
using CancellationTokenSource phaseTimeoutCts = new(remainingTime + ExtraPhaseTimeoutMargin);
using CancellationTokenSource linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, phaseTimeoutCts.Token);
roundState.LogDebug($"Transaction signing phase started - it will end in: {signingStateEndTime - DateTimeOffset.UtcNow:hh\\:mm\\:ss}.");
var signingState = roundState.Assert <SigningState>();
var unsignedCoinJoin = signingState.CreateUnsignedTransaction();
// If everything is okay, then sign all the inputs. Otherwise, in case there are missing outputs, the server is
// lying (it lied us before when it responded with 200 OK to the OutputRegistration requests or it is lying us
// now when we identify as satoshi.
// In this scenario we should ban the coordinator and stop dealing with it.
// see more: https://github.com/zkSNACKs/WalletWasabi/issues/8171
bool mustSignAllInputs = SanityCheck(outputTxOuts, unsignedCoinJoin);
if (!mustSignAllInputs)
{
roundState.LogInfo($"There are missing outputs. A subset of inputs will be signed.");
}
// Send signature.
var combinedToken = linkedCts.Token;
var alicesToSign = mustSignAllInputs
? registeredAliceClients
: registeredAliceClients.RemoveAt(SecureRandom.GetInt(0, registeredAliceClients.Length));
await SignTransactionAsync(alicesToSign, unsignedCoinJoin, signingStateEndTime, combinedToken).ConfigureAwait(false);
roundState.LogDebug($"{alicesToSign.Length} out of {registeredAliceClients.Length} Alices have signed the coinjoin tx.");
return(unsignedCoinJoin, alicesToSign);
}
