public async Task SuccessFromPreviousCoinJoinAsync()
{
WabiSabiConfig cfg = new();
var round = WabiSabiFactory.CreateRound(cfg);
using Key key = new();
var coin = WabiSabiFactory.CreateCoin(key);
var rpc = WabiSabiFactory.CreatePreconfiguredRpcClient(coin);
var coinJoinIdsStore = new InMemoryCoinJoinIdStore();
coinJoinIdsStore.Add(coin.Outpoint.Hash);
using Arena arena = await ArenaBuilder.From(cfg).With(rpc).With(coinJoinIdsStore).CreateAndStartAsync(round);
var minAliceDeadline = DateTimeOffset.UtcNow + cfg.ConnectionConfirmationTimeout * 0.9;
var arenaClient = WabiSabiFactory.CreateArenaClient(arena);
var ownershipProof = WabiSabiFactory.CreateOwnershipProof(key, round.Id);
var(resp, _) = await arenaClient.RegisterInputAsync(round.Id, coin.Outpoint, ownershipProof, CancellationToken.None);
AssertSingleAliceSuccessfullyRegistered(round, minAliceDeadline, resp);
var myAlice = Assert.Single(round.Alices);
Assert.True(myAlice.IsPayingZeroCoordinationFee);
await arena.StopAsync(CancellationToken.None);
}
public WabiSabiCoordinator(CoordinatorParameters parameters, IRPCClient rpc)
{
Parameters = parameters;
Warden = new(parameters.UtxoWardenPeriod, parameters.PrisonFilePath, Config);
ConfigWatcher = new(parameters.ConfigChangeMonitoringPeriod, Config, () => Logger.LogInfo("WabiSabi configuration has changed."));
CoinJoinTransactionArchiver transactionArchiver = new(Path.Combine(parameters.CoordinatorDataDir, "CoinJoinTransactions"));
CoinJoinFeeRateStatStore = CoinJoinFeeRateStatStore.LoadFromFile(parameters.CoinJoinFeeRateStatStoreFilePath, Config, rpc);
IoHelpers.EnsureContainingDirectoryExists(Parameters.CoinJoinFeeRateStatStoreFilePath);
CoinJoinFeeRateStatStore.NewStat += FeeRateStatStore_NewStat;
var inMemoryCoinJoinIdStore = InMemoryCoinJoinIdStore.LoadFromFile(parameters.CoinJoinIdStoreFilePath);
var coinJoinScriptStore = CoinJoinScriptStore.LoadFromFile(parameters.CoinJoinScriptStoreFilePath);
IoHelpers.EnsureContainingDirectoryExists(Parameters.CoinJoinScriptStoreFilePath);
Arena = new(
parameters.RoundProgressSteppingPeriod,
rpc.Network,
Config,
rpc,
Warden.Prison,
inMemoryCoinJoinIdStore,
transactionArchiver,
coinJoinScriptStore);
IoHelpers.EnsureContainingDirectoryExists(Parameters.CoinJoinIdStoreFilePath);
Arena.CoinJoinBroadcast += Arena_CoinJoinBroadcast;
}
public static InMemoryCoinJoinIdStore LoadFromFile(string filePath)
{
var lines = File.Exists(filePath)
? File.ReadAllLines(filePath).Select(x => uint256.Parse(x))
: Enumerable.Empty <uint256>();
var store = new InMemoryCoinJoinIdStore(lines);
return(store);
}
public Arena(
TimeSpan period,
Network network,
WabiSabiConfig config,
IRPCClient rpc,
Prison prison,
InMemoryCoinJoinIdStore inMemoryCoinJoinIdStore,
CoinJoinTransactionArchiver?archiver = null) : base(period)
{
Network = network;
Config = config;
Rpc = rpc;
Prison = prison;
TransactionArchiver = archiver;
Random = new SecureRandom();
InMemoryCoinJoinIdStore = inMemoryCoinJoinIdStore;
}
private async Task <InputRegistrationResponse> RegisterInputCoreAsync(InputRegistrationRequest request, CancellationToken cancellationToken)
{
var coin = await OutpointToCoinAsync(request, cancellationToken).ConfigureAwait(false);
using (await AsyncLock.LockAsync(cancellationToken).ConfigureAwait(false))
{
var round = GetRound(request.RoundId);
var registeredCoins = Rounds.Where(x => !(x.Phase == Phase.Ended && !x.WasTransactionBroadcast))
.SelectMany(r => r.Alices.Select(a => a.Coin));
if (registeredCoins.Any(x => x.Outpoint == coin.Outpoint))
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.AliceAlreadyRegistered);
}
if (round.IsInputRegistrationEnded(Config.MaxInputCountByRound))
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.WrongPhase);
}
if (round is BlameRound blameRound && !blameRound.BlameWhitelist.Contains(coin.Outpoint))
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.InputNotWhitelisted);
}
// Compute but don't commit updated coinjoin to round state, it will
// be re-calculated on input confirmation. This is computed in here
// for validation purposes.
_ = round.Assert <ConstructionState>().AddInput(coin);
var coinJoinInputCommitmentData = new CoinJoinInputCommitmentData("CoinJoinCoordinatorIdentifier", round.Id);
if (!OwnershipProof.VerifyCoinJoinInputProof(request.OwnershipProof, coin.TxOut.ScriptPubKey, coinJoinInputCommitmentData))
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.WrongOwnershipProof);
}
// Generate a new GUID with the secure random source, to be sure
// that it is not guessable (Guid.NewGuid() documentation does
// not say anything about GUID version or randomness source,
// only that the probability of duplicates is very low).
var id = new Guid(Random.GetBytes(16));
var isPayingZeroCoordinationFee = InMemoryCoinJoinIdStore.Contains(coin.Outpoint.Hash);
if (!isPayingZeroCoordinationFee)
{
// If the coin comes from a tx that all of the tx inputs are coming from a CJ (1 hop - no pay).
Transaction tx = await Rpc.GetRawTransactionAsync(coin.Outpoint.Hash, true, cancellationToken).ConfigureAwait(false);
if (tx.Inputs.All(input => InMemoryCoinJoinIdStore.Contains(input.PrevOut.Hash)))
{
isPayingZeroCoordinationFee = true;
}
}
var alice = new Alice(coin, request.OwnershipProof, round, id, isPayingZeroCoordinationFee);
if (alice.CalculateRemainingAmountCredentials(round.FeeRate, round.CoordinationFeeRate) <= Money.Zero)
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.UneconomicalInput);
}
if (alice.TotalInputAmount < round.MinAmountCredentialValue)
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.NotEnoughFunds);
}
if (alice.TotalInputAmount > round.MaxAmountCredentialValue)
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.TooMuchFunds);
}
if (alice.TotalInputVsize > round.MaxVsizeAllocationPerAlice)
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.TooMuchVsize);
}
var amountCredentialTask = round.AmountCredentialIssuer.HandleRequestAsync(request.ZeroAmountCredentialRequests, cancellationToken);
var vsizeCredentialTask = round.VsizeCredentialIssuer.HandleRequestAsync(request.ZeroVsizeCredentialRequests, cancellationToken);
if (round.RemainingInputVsizeAllocation < round.MaxVsizeAllocationPerAlice)
{
throw new WabiSabiProtocolException(WabiSabiProtocolErrorCode.VsizeQuotaExceeded);
}
var commitAmountCredentialResponse = await amountCredentialTask.ConfigureAwait(false);
var commitVsizeCredentialResponse = await vsizeCredentialTask.ConfigureAwait(false);
alice.SetDeadlineRelativeTo(round.ConnectionConfirmationTimeFrame.Duration);
round.Alices.Add(alice);
return(new(alice.Id,
commitAmountCredentialResponse,
commitVsizeCredentialResponse,
alice.IsPayingZeroCoordinationFee));
}
}