public async Task <IActionResult> PostOutputAsync([FromQuery, Required] long roundId, [FromBody, Required] OutputRequest request)
{
if (roundId < 0 ||
request.Level < 0 ||
!ModelState.IsValid)
{
return(BadRequest());
}
CoordinatorRound round = Coordinator.TryGetRound(roundId);
if (round is null)
{
TryLogLateRequest(roundId, RoundPhase.OutputRegistration);
return(NotFound("Round not found."));
}
if (round.Status != CoordinatorRoundStatus.Running)
{
TryLogLateRequest(roundId, RoundPhase.OutputRegistration);
return(Gone("Round is not running."));
}
RoundPhase phase = round.Phase;
if (phase != RoundPhase.OutputRegistration)
{
TryLogLateRequest(roundId, RoundPhase.OutputRegistration);
return(Conflict($"Output registration can only be done from OutputRegistration phase. Current phase: {phase}."));
}
if (request.OutputAddress.Network != Network)
{
// RegTest and TestNet address formats are sometimes the same.
if (Network == Network.Main)
{
return(BadRequest($"Invalid OutputAddress Network."));
}
}
if (request.OutputAddress == Constants.GetCoordinatorAddress(Network))
{
Logger.LogWarning($"Bob is registering the coordinator's address. Address: {request.OutputAddress}, Level: {request.Level}, Signature: {request.UnblindedSignature}.");
}
if (request.Level > round.MixingLevels.GetMaxLevel())
{
return(BadRequest($"Invalid mixing level is provided. Provided: {request.Level}. Maximum: {round.MixingLevels.GetMaxLevel()}."));
}
if (round.ContainsRegisteredUnblindedSignature(request.UnblindedSignature))
{
return(NoContent());
}
MixingLevel mixinglevel = round.MixingLevels.GetLevel(request.Level);
Signer signer = mixinglevel.Signer;
if (signer.VerifyUnblindedSignature(request.UnblindedSignature, request.OutputAddress.ScriptPubKey.ToBytes()))
{
using (await OutputLock.LockAsync())
{
Bob bob = null;
try
{
bob = new Bob(request.OutputAddress, mixinglevel);
round.AddBob(bob);
round.AddRegisteredUnblindedSignature(request.UnblindedSignature);
}
catch (Exception ex)
{
return(BadRequest($"Invalid outputAddress is provided. Details: {ex.Message}"));
}
int bobCount = round.CountBobs();
int blindSigCount = round.CountBlindSignatures();
if (bobCount == blindSigCount) // If there'll be more bobs, then round failed. Someone may broke the crypto.
{
await round.ExecuteNextPhaseAsync(RoundPhase.Signing);
}
}
return(NoContent());
}
return(BadRequest("Invalid signature provided."));
}
public async Task <IActionResult> PostInputsAsync([FromBody, Required] InputsRequest request)
{
// Validate request.
if (request.RoundId < 0 || !ModelState.IsValid)
{
return(BadRequest("Invalid request."));
}
if (request.Inputs.Count() > 7)
{
return(BadRequest("Maximum 7 inputs can be registered."));
}
using (await InputsLock.LockAsync())
{
CoordinatorRound round = Coordinator.TryGetRound(request.RoundId);
if (round is null || round.Phase != RoundPhase.InputRegistration)
{
return(NotFound("No such running round in InputRegistration. Try another round."));
}
// Do more checks.
try
{
uint256[] blindedOutputs = request.BlindedOutputScripts.ToArray();
int blindedOutputCount = blindedOutputs.Length;
int maxBlindedOutputCount = round.MixingLevels.Count();
if (blindedOutputCount > maxBlindedOutputCount)
{
return(BadRequest($"Too many blinded output was provided: {blindedOutputCount}, maximum: {maxBlindedOutputCount}."));
}
if (blindedOutputs.Distinct().Count() < blindedOutputs.Length)
{
return(BadRequest("Duplicate blinded output found."));
}
if (round.ContainsAnyBlindedOutputScript(blindedOutputs))
{
return(BadRequest("Blinded output has already been registered."));
}
if (request.ChangeOutputAddress.Network != Network)
{
// RegTest and TestNet address formats are sometimes the same.
if (Network == Network.Main)
{
return(BadRequest($"Invalid ChangeOutputAddress Network."));
}
}
var uniqueInputs = new HashSet <TxoRef>();
foreach (InputProofModel inputProof in request.Inputs)
{
if (uniqueInputs.Contains(inputProof.Input))
{
return(BadRequest("Cannot register an input twice."));
}
uniqueInputs.Add(inputProof.Input);
}
var alicesToRemove = new HashSet <Guid>();
var getTxOutResponses = new List <(InputProofModel inputModel, Task <GetTxOutResponse> getTxOutTask)>();
var batch = RpcClient.PrepareBatch();
foreach (InputProofModel inputProof in request.Inputs)
{
if (round.ContainsInput(inputProof.Input.ToOutPoint(), out List <Alice> tr))
{
alicesToRemove.UnionWith(tr.Select(x => x.UniqueId)); // Input is already registered by this alice, remove it later if all the checks are completed fine.
}
if (Coordinator.AnyRunningRoundContainsInput(inputProof.Input.ToOutPoint(), out List <Alice> tnr))
{
if (tr.Union(tnr).Count() > tr.Count)
{
return(BadRequest("Input is already registered in another round."));
}
}
OutPoint outpoint = inputProof.Input.ToOutPoint();
var bannedElem = await Coordinator.UtxoReferee.TryGetBannedAsync(outpoint, notedToo : false);
if (bannedElem != null)
{
return(BadRequest($"Input is banned from participation for {(int)bannedElem.BannedRemaining.TotalMinutes} minutes: {inputProof.Input.Index}:{inputProof.Input.TransactionId}."));
}
var txOutResponseTask = batch.GetTxOutAsync(inputProof.Input.TransactionId, (int)inputProof.Input.Index, includeMempool: true);
getTxOutResponses.Add((inputProof, txOutResponseTask));
}
// Perform all RPC request at once
var waiting = Task.WhenAll(getTxOutResponses.Select(x => x.getTxOutTask));
await batch.SendBatchAsync();
await waiting;
byte[] blindedOutputScriptHashesByte = ByteHelpers.Combine(blindedOutputs.Select(x => x.ToBytes()));
uint256 blindedOutputScriptsHash = new uint256(Hashes.SHA256(blindedOutputScriptHashesByte));
var inputs = new HashSet <Coin>();
foreach (var responses in getTxOutResponses)
{
var(inputProof, getTxOutResponseTask) = responses;
var getTxOutResponse = await getTxOutResponseTask;
// Check if inputs are unspent.
if (getTxOutResponse is null)
{
return(BadRequest($"Provided input is not unspent: {inputProof.Input.Index}:{inputProof.Input.TransactionId}."));
}
// Check if unconfirmed.
if (getTxOutResponse.Confirmations <= 0)
{
// If it spends a CJ then it may be acceptable to register.
if (!await Coordinator.ContainsCoinJoinAsync(inputProof.Input.TransactionId))
{
return(BadRequest("Provided input is neither confirmed, nor is from an unconfirmed coinjoin."));
}
// Check if mempool would accept a fake transaction created with the registered inputs.
// This will catch ascendant/descendant count and size limits for example.
var result = await RpcClient.TestMempoolAcceptAsync(new[] { new Coin(inputProof.Input.ToOutPoint(), getTxOutResponse.TxOut) });
if (!result.accept)
{
return(BadRequest($"Provided input is from an unconfirmed coinjoin, but a limit is reached: {result.rejectReason}"));
}
}
// Check if immature.
if (getTxOutResponse.Confirmations <= 100)
{
if (getTxOutResponse.IsCoinBase)
{
return(BadRequest("Provided input is immature."));
}
}
// Check if inputs are native segwit.
if (getTxOutResponse.ScriptPubKeyType != "witness_v0_keyhash")
{
return(BadRequest("Provided input must be witness_v0_keyhash."));
}
TxOut txOut = getTxOutResponse.TxOut;
var address = (BitcoinWitPubKeyAddress)txOut.ScriptPubKey.GetDestinationAddress(Network);
// Check if proofs are valid.
if (!address.VerifyMessage(blindedOutputScriptsHash, inputProof.Proof))
{
return(BadRequest("Provided proof is invalid."));
}
inputs.Add(new Coin(inputProof.Input.ToOutPoint(), txOut));
}
var acceptedBlindedOutputScripts = new List <uint256>();
// Calculate expected networkfee to pay after base denomination.
int inputCount = inputs.Count;
Money networkFeeToPayAfterBaseDenomination = (inputCount * round.FeePerInputs) + (2 * round.FeePerOutputs);
// Check if inputs have enough coins.
Money inputSum = inputs.Sum(x => x.Amount);
Money changeAmount = (inputSum - (round.MixingLevels.GetBaseDenomination() + networkFeeToPayAfterBaseDenomination));
if (changeAmount < Money.Zero)
{
return(BadRequest($"Not enough inputs are provided. Fee to pay: {networkFeeToPayAfterBaseDenomination.ToString(false, true)} BTC. Round denomination: {round.MixingLevels.GetBaseDenomination().ToString(false, true)} BTC. Only provided: {inputSum.ToString(false, true)} BTC."));
}
acceptedBlindedOutputScripts.Add(blindedOutputs.First());
Money networkFeeToPay = networkFeeToPayAfterBaseDenomination;
// Make sure we sign the proper number of additional blinded outputs.
var moneySoFar = Money.Zero;
for (int i = 1; i < blindedOutputCount; i++)
{
if (!round.MixingLevels.TryGetDenomination(i, out Money denomination))
{
break;
}
Money coordinatorFee = denomination.Percentage(round.CoordinatorFeePercent * round.AnonymitySet); // It should be the number of bobs, but we must make sure they'd have money to pay all.
changeAmount -= (denomination + round.FeePerOutputs + coordinatorFee);
networkFeeToPay += round.FeePerOutputs;
if (changeAmount < Money.Zero)
{
break;
}
acceptedBlindedOutputScripts.Add(blindedOutputs[i]);
}
// Make sure Alice checks work.
var alice = new Alice(inputs, networkFeeToPayAfterBaseDenomination, request.ChangeOutputAddress, acceptedBlindedOutputScripts);
foreach (Guid aliceToRemove in alicesToRemove)
{
round.RemoveAlicesBy(aliceToRemove);
}
round.AddAlice(alice);
// All checks are good. Sign.
var blindSignatures = new List <uint256>();
for (int i = 0; i < acceptedBlindedOutputScripts.Count; i++)
{
var blindedOutput = acceptedBlindedOutputScripts[i];
var signer = round.MixingLevels.GetLevel(i).Signer;
uint256 blindSignature = signer.Sign(blindedOutput);
blindSignatures.Add(blindSignature);
}
alice.BlindedOutputSignatures = blindSignatures.ToArray();
// Check if phase changed since.
if (round.Status != CoordinatorRoundStatus.Running || round.Phase != RoundPhase.InputRegistration)
{
return(StatusCode(StatusCodes.Status503ServiceUnavailable, "The state of the round changed while handling the request. Try again."));
}
// Progress round if needed.
if (round.CountAlices() >= round.AnonymitySet)
{
await round.RemoveAlicesIfAnInputRefusedByMempoolAsync();
if (round.CountAlices() >= round.AnonymitySet)
{
await round.ExecuteNextPhaseAsync(RoundPhase.ConnectionConfirmation);
}
}
var resp = new InputsResponse
{
UniqueId = alice.UniqueId,
RoundId = round.RoundId
};
return(Ok(resp));
}
catch (Exception ex)
{
Logger.LogDebug(ex);
return(BadRequest(ex.Message));
}
}
}
public async Task BanningTestsAsync()
{
(string password, IRPCClient rpc, Network network, Coordinator coordinator, ServiceConfiguration serviceConfiguration, BitcoinStore bitcoinStore, Backend.Global global) = await Common.InitializeTestEnvironmentAsync(RegTestFixture, 1);
Money denomination = Money.Coins(0.1m);
decimal coordinatorFeePercent = 0.1m;
int anonymitySet = 3;
int connectionConfirmationTimeout = 120;
var roundConfig = RegTestFixture.CreateRoundConfig(denomination, 140, 0.7, coordinatorFeePercent, anonymitySet, 240, connectionConfirmationTimeout, 1, 1, 1, 24, true, 11);
coordinator.RoundConfig.UpdateOrDefault(roundConfig, toFile: true);
coordinator.AbortAllRoundsInInputRegistration("");
await rpc.GenerateAsync(3); // So to make sure we have enough money.
Uri baseUri = new Uri(RegTestFixture.BackendEndPoint);
var fundingTxCount = 0;
var inputRegistrationUsers = new List <(Requester requester, uint256 blinded, BitcoinAddress activeOutputAddress, BitcoinAddress changeOutputAddress, IEnumerable <InputProofModel> inputProofModels, List <(Key key, BitcoinWitPubKeyAddress address, uint256 txHash, Transaction tx, OutPoint input)> userInputData)>();
CoordinatorRound round = null;
for (int i = 0; i < roundConfig.AnonymitySet; i++)
{
var userInputData = new List <(Key key, BitcoinWitPubKeyAddress inputAddress, uint256 txHash, Transaction tx, OutPoint input)>();
var activeOutputAddress = new Key().PubKey.GetAddress(ScriptPubKeyType.Segwit, network);
var changeOutputAddress = new Key().PubKey.GetAddress(ScriptPubKeyType.Segwit, network);
round = coordinator.GetCurrentInputRegisterableRoundOrDefault();
Requester requester = new Requester();
uint256 blinded = requester.BlindScript(round.MixingLevels.GetBaseLevel().Signer.Key.PubKey, round.MixingLevels.GetBaseLevel().Signer.R.PubKey, activeOutputAddress.ScriptPubKey);
uint256 blindedOutputScriptsHash = new uint256(Hashes.SHA256(blinded.ToBytes()));
var inputProofModels = new List <InputProofModel>();
int numberOfInputs = new Random().Next(1, 7);
var receiveSatoshiSum = 0;
for (int j = 0; j < numberOfInputs; j++)
{
var key = new Key();
var receiveSatoshi = new Random().Next(1000, 100000000);
receiveSatoshiSum += receiveSatoshi;
if (j == numberOfInputs - 1)
{
receiveSatoshi = 100000000;
}
BitcoinWitPubKeyAddress inputAddress = key.PubKey.GetSegwitAddress(network);
uint256 txHash = await rpc.SendToAddressAsync(inputAddress, Money.Satoshis(receiveSatoshi));
fundingTxCount++;
Assert.NotNull(txHash);
Transaction transaction = await rpc.GetRawTransactionAsync(txHash);
var coin = transaction.Outputs.GetCoins(inputAddress.ScriptPubKey).Single();
OutPoint input = coin.Outpoint;
var inputProof = new InputProofModel {
Input = input, Proof = key.SignCompact(blindedOutputScriptsHash)
};
inputProofModels.Add(inputProof);
GetTxOutResponse getTxOutResponse = await rpc.GetTxOutAsync(input.Hash, (int)input.N, includeMempool : true);
// Check if inputs are unspent.
Assert.NotNull(getTxOutResponse);
userInputData.Add((key, inputAddress, txHash, transaction, input));
}
inputRegistrationUsers.Add((requester, blinded, activeOutputAddress, changeOutputAddress, inputProofModels, userInputData));
}
var mempool = await rpc.GetRawMempoolAsync();
Assert.Equal(inputRegistrationUsers.SelectMany(x => x.userInputData).Count(), mempool.Length);
while ((await rpc.GetRawMempoolAsync()).Length != 0)
{
await rpc.GenerateAsync(1);
}
var aliceClients = new List <Task <AliceClient> >();
foreach (var user in inputRegistrationUsers)
{
aliceClients.Add(AliceClient.CreateNewAsync(round.RoundId, new[] { user.activeOutputAddress }, new[] { round.MixingLevels.GetBaseLevel().SchnorrKey.SchnorrPubKey }, new[] { user.requester }, network, user.changeOutputAddress, new[] { user.blinded }, user.inputProofModels, baseUri, null));
}
long roundId = 0;
var users = new List <(Requester requester, uint256 blinded, BitcoinAddress activeOutputAddress, BitcoinAddress changeOutputAddress, IEnumerable <InputProofModel> inputProofModels, List <(Key key, BitcoinWitPubKeyAddress address, uint256 txHash, Transaction tx, OutPoint input)> userInputData, AliceClient aliceClient, UnblindedSignature unblindedSignature)>();
for (int i = 0; i < inputRegistrationUsers.Count; i++)
{
var user = inputRegistrationUsers[i];
var request = aliceClients[i];
var aliceClient = await request;
if (roundId == 0)
{
roundId = aliceClient.RoundId;
}
else
{
Assert.Equal(roundId, aliceClient.RoundId);
}
// Because it's valuetuple.
users.Add((user.requester, user.blinded, user.activeOutputAddress, user.changeOutputAddress, user.inputProofModels, user.userInputData, aliceClient, null));
}
Assert.Equal(users.Count, roundConfig.AnonymitySet);
var confirmationRequests = new List <Task <(RoundPhase currentPhase, IEnumerable <ActiveOutput>)> >();
foreach (var user in users)
{
confirmationRequests.Add(user.aliceClient.PostConfirmationAsync());
}
RoundPhase roundPhase = RoundPhase.InputRegistration;
int k = 0;
foreach (var request in confirmationRequests)
{
var resp = await request;
if (roundPhase == RoundPhase.InputRegistration)
{
roundPhase = resp.currentPhase;
}
else
{
Assert.Equal(roundPhase, resp.currentPhase);
}
var user = users.ElementAt(k);
user.unblindedSignature = resp.Item2.First().Signature;
}
using (var satoshiClient = new SatoshiClient(baseUri, null))
{
var times = 0;
while (!(await satoshiClient.GetAllRoundStatesAsync()).All(x => x.Phase == RoundPhase.InputRegistration))
{
await Task.Delay(100);
if (times > 50) // 5 sec, 3 should be enough
{
throw new TimeoutException("Not all rounds were in InputRegistration.");
}
times++;
}
}
int bannedCount = coordinator.UtxoReferee.CountBanned(false);
Assert.Equal(0, bannedCount);
aliceClients.Clear();
round = coordinator.GetCurrentInputRegisterableRoundOrDefault();
foreach (var user in inputRegistrationUsers)
{
aliceClients.Add(AliceClient.CreateNewAsync(round.RoundId, new[] { user.activeOutputAddress }, new[] { round.MixingLevels.GetBaseLevel().SchnorrKey.SchnorrPubKey }, new[] { user.requester }, network, user.changeOutputAddress, new[] { user.blinded }, user.inputProofModels, baseUri, null));
}
roundId = 0;
users = new List <(Requester requester, uint256 blinded, BitcoinAddress activeOutputAddress, BitcoinAddress changeOutputAddress, IEnumerable <InputProofModel> inputProofModels, List <(Key key, BitcoinWitPubKeyAddress address, uint256 txHash, Transaction tx, OutPoint input)> userInputData, AliceClient aliceClient, UnblindedSignature unblindedSignature)>();
for (int i = 0; i < inputRegistrationUsers.Count; i++)
{
var user = inputRegistrationUsers[i];
var request = aliceClients[i];
var aliceClient = await request;
if (roundId == 0)
{
roundId = aliceClient.RoundId;
}
else
{
Assert.Equal(roundId, aliceClient.RoundId);
}
// Because it's valuetuple.
users.Add((user.requester, user.blinded, user.activeOutputAddress, user.changeOutputAddress, user.inputProofModels, user.userInputData, aliceClient, null));
}
Assert.Equal(users.Count, roundConfig.AnonymitySet);
confirmationRequests = new List <Task <(RoundPhase currentPhase, IEnumerable <ActiveOutput>)> >();
foreach (var user in users)
{
confirmationRequests.Add(user.aliceClient.PostConfirmationAsync());
}
using (var satoshiClient = new SatoshiClient(baseUri, null))
{
var times = 0;
while (!(await satoshiClient.GetAllRoundStatesAsync()).All(x => x.Phase == RoundPhase.InputRegistration))
{
await Task.Delay(100);
if (times > 50) // 5 sec, 3 should be enough
{
throw new TimeoutException("Not all rounds were in InputRegistration.");
}
times++;
}
}
bannedCount = coordinator.UtxoReferee.CountBanned(false);
Assert.True(bannedCount >= roundConfig.AnonymitySet);
foreach (var aliceClient in aliceClients)
{
aliceClient?.Dispose();
}
}
public async Task NotingTestsAsync()
{
(string password, IRPCClient rpc, Network network, Coordinator coordinator, ServiceConfiguration serviceConfiguration, BitcoinStore bitcoinStore, Backend.Global global) = await Common.InitializeTestEnvironmentAsync(RegTestFixture, 1);
Money denomination = Money.Coins(1m);
decimal coordinatorFeePercent = 0.1m;
int anonymitySet = 2;
int connectionConfirmationTimeout = 1;
bool doesNoteBeforeBan = true;
CoordinatorRoundConfig roundConfig = RegTestFixture.CreateRoundConfig(denomination, 140, 0.7, coordinatorFeePercent, anonymitySet, 240, connectionConfirmationTimeout, 1, 1, 1, 24, doesNoteBeforeBan, 11);
coordinator.RoundConfig.UpdateOrDefault(roundConfig, toFile: true);
coordinator.AbortAllRoundsInInputRegistration("");
Uri baseUri = new Uri(RegTestFixture.BackendEndPoint);
var registerRequests = new List <(BitcoinWitPubKeyAddress changeOutputAddress, uint256 blindedData, InputProofModel[] inputsProofs)>();
AliceClient aliceClientBackup = null;
CoordinatorRound round = coordinator.GetCurrentInputRegisterableRoundOrDefault();
for (int i = 0; i < roundConfig.AnonymitySet; i++)
{
BitcoinWitPubKeyAddress activeOutputAddress = new Key().PubKey.GetSegwitAddress(network);
BitcoinWitPubKeyAddress changeOutputAddress = new Key().PubKey.GetSegwitAddress(network);
Key inputKey = new Key();
BitcoinWitPubKeyAddress inputAddress = inputKey.PubKey.GetSegwitAddress(network);
var requester = new Requester();
uint256 blinded = requester.BlindScript(round.MixingLevels.GetBaseLevel().Signer.Key.PubKey, round.MixingLevels.GetBaseLevel().Signer.R.PubKey, activeOutputAddress.ScriptPubKey);
uint256 blindedOutputScriptsHash = new uint256(Hashes.SHA256(blinded.ToBytes()));
uint256 txHash = await rpc.SendToAddressAsync(inputAddress, Money.Coins(2));
await rpc.GenerateAsync(1);
Transaction transaction = await rpc.GetRawTransactionAsync(txHash);
Coin coin = transaction.Outputs.GetCoins(inputAddress.ScriptPubKey).Single();
OutPoint input = coin.Outpoint;
InputProofModel inputProof = new InputProofModel {
Input = input, Proof = inputKey.SignCompact(blindedOutputScriptsHash)
};
InputProofModel[] inputsProofs = new InputProofModel[] { inputProof };
registerRequests.Add((changeOutputAddress, blinded, inputsProofs));
aliceClientBackup = await AliceClient.CreateNewAsync(round.RoundId, new[] { activeOutputAddress }, new[] { round.MixingLevels.GetBaseLevel().SchnorrKey.SchnorrPubKey }, new[] { requester }, network, changeOutputAddress, new[] { blinded }, inputsProofs, baseUri, null);
}
await WaitForTimeoutAsync(baseUri);
int bannedCount = coordinator.UtxoReferee.CountBanned(false);
Assert.Equal(0, bannedCount);
int notedCount = coordinator.UtxoReferee.CountBanned(true);
Assert.Equal(anonymitySet, notedCount);
round = coordinator.GetCurrentInputRegisterableRoundOrDefault();
foreach (var registerRequest in registerRequests)
{
await AliceClient.CreateNewAsync(round.RoundId, aliceClientBackup.RegisteredAddresses, round.MixingLevels.GetAllLevels().Select(x => x.SchnorrKey.SchnorrPubKey), aliceClientBackup.Requesters, network, registerRequest.changeOutputAddress, new[] { registerRequest.blindedData }, registerRequest.inputsProofs, baseUri, null);
}
await WaitForTimeoutAsync(baseUri);
bannedCount = coordinator.UtxoReferee.CountBanned(false);
Assert.Equal(anonymitySet, bannedCount);
notedCount = coordinator.UtxoReferee.CountBanned(true);
Assert.Equal(anonymitySet, notedCount);
}
private async void Round_StatusChangedAsync(object sender, CoordinatorRoundStatus status)
{
try
{
var round = sender as CoordinatorRound;
Money feePerInputs = null;
Money feePerOutputs = null;
// If success save the coinjoin.
if (status == CoordinatorRoundStatus.Succeded)
{
using (await CoinJoinsLock.LockAsync().ConfigureAwait(false))
{
uint256 coinJoinHash = round.CoinJoin.GetHash();
CoinJoins.Add(coinJoinHash);
UnconfirmedCoinJoins.Add(coinJoinHash);
LastSuccessfulCoinJoinTime = DateTimeOffset.UtcNow;
await File.AppendAllLinesAsync(CoinJoinsFilePath, new[] { coinJoinHash.ToString() }).ConfigureAwait(false);
// When a round succeeded, adjust the denomination as to users still be able to register with the latest round's active output amount.
IEnumerable <(Money value, int count)> outputs = round.CoinJoin.GetIndistinguishableOutputs(includeSingle: true);
var bestOutput = outputs.OrderByDescending(x => x.count).FirstOrDefault();
if (bestOutput != default)
{
Money activeOutputAmount = bestOutput.value;
int currentConfirmationTarget = await AdjustConfirmationTargetAsync(lockCoinJoins : false).ConfigureAwait(false);
var fees = await CoordinatorRound.CalculateFeesAsync(RpcClient, currentConfirmationTarget).ConfigureAwait(false);
feePerInputs = fees.feePerInputs;
feePerOutputs = fees.feePerOutputs;
Money newDenominationToGetInWithactiveOutputs = activeOutputAmount - (feePerInputs + (2 * feePerOutputs));
if (newDenominationToGetInWithactiveOutputs < RoundConfig.Denomination)
{
if (newDenominationToGetInWithactiveOutputs > Money.Coins(0.01m))
{
RoundConfig.Denomination = newDenominationToGetInWithactiveOutputs;
RoundConfig.ToFile();
}
}
}
}
}
// If aborted in signing phase, then ban Alices that did not sign.
if (status == CoordinatorRoundStatus.Aborted && round.Phase == RoundPhase.Signing)
{
IEnumerable <Alice> alicesDidntSign = round.GetAlicesByNot(AliceState.SignedCoinJoin, syncLock: false);
CoordinatorRound nextRound = GetCurrentInputRegisterableRoundOrDefault(syncLock: false);
if (nextRound != null)
{
int nextRoundAlicesCount = nextRound.CountAlices(syncLock: false);
var alicesSignedCount = round.AnonymitySet - alicesDidntSign.Count();
// New round's anonset should be the number of alices that signed in this round.
// Except if the number of alices in the next round is already larger.
var newAnonymitySet = Math.Max(alicesSignedCount, nextRoundAlicesCount);
// But it cannot be larger than the current anonset of that round.
newAnonymitySet = Math.Min(newAnonymitySet, nextRound.AnonymitySet);
// Only change the anonymity set of the next round if new anonset does not equal and newanonset is larger than 1.
if (nextRound.AnonymitySet != newAnonymitySet && newAnonymitySet > 1)
{
nextRound.UpdateAnonymitySet(newAnonymitySet, syncLock: false);
if (nextRoundAlicesCount >= nextRound.AnonymitySet)
{
// Progress to the next phase, which will be OutputRegistration
await nextRound.ExecuteNextPhaseAsync(RoundPhase.ConnectionConfirmation).ConfigureAwait(false);
}
}
}
foreach (Alice alice in alicesDidntSign) // Because the event sometimes is raised from inside the lock.
{
// If it is from any coinjoin, then do not ban.
IEnumerable <OutPoint> utxosToBan = alice.Inputs.Select(x => x.Outpoint);
await UtxoReferee.BanUtxosAsync(1, DateTimeOffset.UtcNow, forceNoted : false, round.RoundId, utxosToBan.ToArray()).ConfigureAwait(false);
}
}
// If finished start a new round.
if (status == CoordinatorRoundStatus.Aborted || status == CoordinatorRoundStatus.Succeded)
{
round.StatusChanged -= Round_StatusChangedAsync;
round.CoinJoinBroadcasted -= Round_CoinJoinBroadcasted;
await MakeSureTwoRunningRoundsAsync(feePerInputs, feePerOutputs).ConfigureAwait(false);
}
}
catch (Exception ex)
{
Logger.LogWarning(ex);
}
}
private async void Round_StatusChangedAsync(object sender, CoordinatorRoundStatus status)
{
try
{
var round = sender as CoordinatorRound;
Money feePerInputs = null;
Money feePerOutputs = null;
// If success save the coinjoin.
if (status == CoordinatorRoundStatus.Succeded)
{
uint256[] mempoolHashes = null;
try
{
mempoolHashes = await RpcClient.GetRawMempoolAsync().ConfigureAwait(false);
}
catch (Exception ex)
{
Logger.LogError(ex);
}
using (await CoinJoinsLock.LockAsync().ConfigureAwait(false))
{
if (mempoolHashes is { })
{
var fallOuts = UnconfirmedCoinJoins.Where(x => !mempoolHashes.Contains(x));
CoinJoins.RemoveAll(x => fallOuts.Contains(x));
UnconfirmedCoinJoins.RemoveAll(x => fallOuts.Contains(x));
}
uint256 coinJoinHash = round.CoinJoin.GetHash();
CoinJoins.Add(coinJoinHash);
UnconfirmedCoinJoins.Add(coinJoinHash);
LastSuccessfulCoinJoinTime = DateTimeOffset.UtcNow;
await File.AppendAllLinesAsync(CoinJoinsFilePath, new[] { coinJoinHash.ToString() }).ConfigureAwait(false);
// When a round succeeded, adjust the denomination as to users still be able to register with the latest round's active output amount.
IEnumerable <(Money value, int count)> outputs = round.CoinJoin.GetIndistinguishableOutputs(includeSingle: true);
var bestOutput = outputs.OrderByDescending(x => x.count).FirstOrDefault();
if (bestOutput != default)
{
Money activeOutputAmount = bestOutput.value;
int currentConfirmationTarget = await AdjustConfirmationTargetAsync(lockCoinJoins : false).ConfigureAwait(false);
var fees = await CoordinatorRound.CalculateFeesAsync(RpcClient, currentConfirmationTarget).ConfigureAwait(false);
feePerInputs = fees.feePerInputs;
feePerOutputs = fees.feePerOutputs;
Money newDenominationToGetInWithactiveOutputs = activeOutputAmount - (feePerInputs + (2 * feePerOutputs));
if (newDenominationToGetInWithactiveOutputs < RoundConfig.Denomination)
{
if (newDenominationToGetInWithactiveOutputs > Money.Coins(0.01m))
{
RoundConfig.Denomination = newDenominationToGetInWithactiveOutputs;
RoundConfig.ToFile();
}
}
}
}