public async Task StartOutputRegistrationsAsync(IEnumerable <TxOut> txOuts, BobClient bobClient, CancellationToken cancellationToken)
{
List <Task> outputTasks = new();
using CancellationTokenSource ctsOnError = new();
using CancellationTokenSource linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, ctsOnError.Token);
foreach (var(node, txOut) in Enumerable.Zip(Graph.Outputs, txOuts))
{
var amountCredsToPresentTasks = Graph.InEdges(node, CredentialType.Amount).Select(edge => DependencyTasks[edge].Task);
var vsizeCredsToPresentTasks = Graph.InEdges(node, CredentialType.Vsize).Select(edge => DependencyTasks[edge].Task);
SmartRequestNode smartRequestNode = new(
amountCredsToPresentTasks,
vsizeCredsToPresentTasks,
Array.Empty <TaskCompletionSource <Credential> >(),
Array.Empty <TaskCompletionSource <Credential> >());
var task = smartRequestNode
.StartOutputRegistrationAsync(bobClient, txOut.ScriptPubKey, cancellationToken)
.ContinueWith((t) =>
{
if (t.IsFaulted && t.Exception is { } exception)
{
// If one task is failing, cancel all the tasks and throw.
ctsOnError.Cancel();
throw exception;
}
}, linkedCts.Token);
outputTasks.Add(task);
}
await Task.WhenAll(outputTasks).ConfigureAwait(false);
}
public async Task StartReissuanceAsync(BobClient bobClient, IEnumerable <long> amounts, IEnumerable <long> vsizes, CancellationToken cancellationToken)
{
await Task.WhenAll(AmountCredentialToPresentTasks.Concat(VsizeCredentialToPresentTasks)).ConfigureAwait(false);
IEnumerable <Credential> inputAmountCredentials = AmountCredentialToPresentTasks.Select(x => x.Result);
IEnumerable <Credential> inputVsizeCredentials = VsizeCredentialToPresentTasks.Select(x => x.Result);
var amountsToRequest = AddExtraCredentialRequests(amounts, inputAmountCredentials.Sum(x => x.Value));
var vsizesToRequest = AddExtraCredentialRequests(vsizes, inputVsizeCredentials.Sum(x => x.Value));
(IEnumerable <Credential> RealAmountCredentials, IEnumerable <Credential> RealVsizeCredentials)result = await bobClient.ReissueCredentialsAsync(
amountsToRequest,
vsizesToRequest,
inputAmountCredentials,
inputVsizeCredentials,
cancellationToken).ConfigureAwait(false);
// TODO keep the credentials that were not needed by the graph
var(amountCredentials, _) = SeparateExtraCredentials(result.RealAmountCredentials, amounts);
var(vsizeCredentials, _) = SeparateExtraCredentials(result.RealVsizeCredentials, vsizes);
foreach (var(tcs, credential) in AmountCredentialTasks.Zip(amountCredentials))
{
tcs.SetResult(credential);
}
foreach (var(tcs, credential) in VsizeCredentialTasks.Zip(vsizeCredentials))
{
tcs.SetResult(credential);
}
}
public async Task StartOutputRegistrationAsync(
BobClient bobClient,
Script scriptPubKey,
CancellationToken cancellationToken)
{
await Task.WhenAll(AmountCredentialToPresentTasks.Concat(VsizeCredentialToPresentTasks)).ConfigureAwait(false);
IEnumerable <Credential> inputAmountCredentials = AmountCredentialToPresentTasks.Select(x => x.Result);
IEnumerable <Credential> inputVsizeCredentials = VsizeCredentialToPresentTasks.Select(x => x.Result);
await bobClient.RegisterOutputAsync(
scriptPubKey,
inputAmountCredentials,
inputVsizeCredentials,
cancellationToken).ConfigureAwait(false);
}
public async Task StartReissuancesAsync(IEnumerable <AliceClient> aliceClients, BobClient bobClient, CancellationToken cancellationToken)
{
var aliceNodePairs = PairAliceClientAndRequestNodes(aliceClients, Graph);
// Build tasks and link them together.
List <SmartRequestNode> smartRequestNodes = new();
List <Task> allTasks = new();
// Temporary workaround because we don't yet have a mechanism to
// propagate the final amounts to request amounts to AliceClient's
// connection confirmation loop even though they are already known
// after the final successful input registration, which may be well
// before the connection confirmation phase actually starts.
allTasks.Add(CompleteConnectionConfirmationAsync(aliceClients, bobClient, cancellationToken));
using CancellationTokenSource ctsOnError = new();
using CancellationTokenSource linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, ctsOnError.Token);
foreach (var node in Graph.Reissuances)
{
var inputAmountEdgeTasks = Graph.InEdges(node, CredentialType.Amount).Select(edge => DependencyTasks[edge].Task);
var inputVsizeEdgeTasks = Graph.InEdges(node, CredentialType.Vsize).Select(edge => DependencyTasks[edge].Task);
var outputAmountEdgeTaskCompSources = Graph.OutEdges(node, CredentialType.Amount).Select(edge => DependencyTasks[edge]);
var outputVsizeEdgeTaskCompSources = Graph.OutEdges(node, CredentialType.Vsize).Select(edge => DependencyTasks[edge]);
var requestedAmounts = Graph.OutEdges(node, CredentialType.Amount).Select(edge => edge.Value);
var requestedVSizes = Graph.OutEdges(node, CredentialType.Vsize).Select(edge => edge.Value);
SmartRequestNode smartRequestNode = new(
inputAmountEdgeTasks,
inputVsizeEdgeTasks,
outputAmountEdgeTaskCompSources,
outputVsizeEdgeTaskCompSources);
var task = smartRequestNode
.StartReissuanceAsync(bobClient, requestedAmounts, requestedVSizes, linkedCts.Token)
.ContinueWith((t) =>
{
if (t.IsFaulted && t.Exception is { } exception)
{
// If one task is failing, cancel all the tasks and throw.
ctsOnError.Cancel();
throw exception;
}
}, linkedCts.Token);
allTasks.Add(task);
}
await Task.WhenAll(allTasks).ConfigureAwait(false);
var amountEdges = Graph.Outputs.SelectMany(node => Graph.InEdges(node, CredentialType.Amount));
var vsizeEdges = Graph.Outputs.SelectMany(node => Graph.InEdges(node, CredentialType.Vsize));
// Check if all tasks were finished, otherwise Task.Result will block.
if (!amountEdges.Concat(vsizeEdges).All(edge => DependencyTasks[edge].Task.IsCompletedSuccessfully))
{
throw new InvalidOperationException("Some Output nodes in-edges failed to complete");
}
}
private async Task CompleteConnectionConfirmationAsync(IEnumerable <AliceClient> aliceClients, BobClient bobClient, CancellationToken cancellationToken)
{
var aliceNodePairs = PairAliceClientAndRequestNodes(aliceClients, Graph);
List <Task> connectionConfirmationTasks = new();
using CancellationTokenSource ctsOnError = new();
using CancellationTokenSource linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, ctsOnError.Token);
foreach ((var aliceClient, var node) in aliceNodePairs)
{
var amountEdgeTaskCompSources = Graph.OutEdges(node, CredentialType.Amount).Select(edge => DependencyTasks[edge]);
var vsizeEdgeTaskCompSources = Graph.OutEdges(node, CredentialType.Vsize).Select(edge => DependencyTasks[edge]);
SmartRequestNode smartRequestNode = new(
aliceClient.IssuedAmountCredentials.Take(ProtocolConstants.CredentialNumber).Select(Task.FromResult),
aliceClient.IssuedVsizeCredentials.Take(ProtocolConstants.CredentialNumber).Select(Task.FromResult),
amountEdgeTaskCompSources,
vsizeEdgeTaskCompSources);
var amountsToRequest = Graph.OutEdges(node, CredentialType.Amount).Select(e => e.Value);
var vsizesToRequest = Graph.OutEdges(node, CredentialType.Vsize).Select(e => e.Value);
// Although connection confirmation requests support k
// credential requests, for now we only know which amounts to
// request after connection confirmation has finished and the
// final decomposition can be computed, so as a workaround we
// unconditionally request the full amount in one credential and
// then do an equivalent reissuance request for every connection
// confirmation.
var task = smartRequestNode
.StartReissuanceAsync(bobClient, amountsToRequest, vsizesToRequest, linkedCts.Token)
.ContinueWith((t) =>
{
if (t.IsFaulted && t.Exception is { } exception)
{
// If one task is failing, cancel all the tasks and throw.
ctsOnError.Cancel();
throw exception;
}
}, linkedCts.Token);
connectionConfirmationTasks.Add(task);
}
await Task.WhenAll(connectionConfirmationTasks).ConfigureAwait(false);
var amountEdges = Graph.Inputs.SelectMany(node => Graph.OutEdges(node, CredentialType.Amount));
var vsizeEdges = Graph.Inputs.SelectMany(node => Graph.OutEdges(node, CredentialType.Vsize));
// Check if all tasks were finished, otherwise Task.Result will block.
if (!amountEdges.Concat(vsizeEdges).All(edge => DependencyTasks[edge].Task.IsCompletedSuccessfully))
{
throw new InvalidOperationException("Some Input nodes out-edges failed to complete.");
}
}
public async Task StartReissuancesAsync(IEnumerable <AliceClient> aliceClients, BobClient bobClient, CancellationToken cancellationToken)
{
var aliceNodePairs = PairAliceClientAndRequestNodes(aliceClients, Graph);
// Build tasks and link them together.
List <SmartRequestNode> smartRequestNodes = new();
List <Task> allTasks = new();
using CancellationTokenSource ctsOnError = new();
using CancellationTokenSource linkedCts = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken, ctsOnError.Token);
foreach (var node in Graph.Reissuances)
{
var inputAmountEdgeTasks = Graph.InEdges(node, CredentialType.Amount).Select(edge => DependencyTasks[edge].Task);
var inputVsizeEdgeTasks = Graph.InEdges(node, CredentialType.Vsize).Select(edge => DependencyTasks[edge].Task);
var outputAmountEdgeTaskCompSources = Graph.OutEdges(node, CredentialType.Amount).Select(edge => DependencyTasks[edge]);
var outputVsizeEdgeTaskCompSources = Graph.OutEdges(node, CredentialType.Vsize).Select(edge => DependencyTasks[edge]);
var requestedAmounts = Graph.OutEdges(node, CredentialType.Amount).Select(edge => (long)edge.Value);
var requestedVSizes = Graph.OutEdges(node, CredentialType.Vsize).Select(edge => (long)edge.Value);
SmartRequestNode smartRequestNode = new(
inputAmountEdgeTasks,
inputVsizeEdgeTasks,
outputAmountEdgeTaskCompSources,
outputVsizeEdgeTaskCompSources);
var task = smartRequestNode
.StartReissuanceAsync(bobClient, requestedAmounts, requestedVSizes, linkedCts.Token)
.ContinueWith((t) =>
{
if (t.IsFaulted && t.Exception is { } exception)
{
// If one task is failing, cancel all the tasks and throw.
ctsOnError.Cancel();
throw exception;
}
}, linkedCts.Token);
allTasks.Add(task);
}
await Task.WhenAll(allTasks).ConfigureAwait(false);
var amountEdges = Graph.Outputs.SelectMany(node => Graph.InEdges(node, CredentialType.Amount));
var vsizeEdges = Graph.Outputs.SelectMany(node => Graph.InEdges(node, CredentialType.Vsize));
// Check if all tasks were finished, otherwise Task.Result will block.
if (!amountEdges.Concat(vsizeEdges).All(edge => DependencyTasks[edge].Task.IsCompletedSuccessfully))
{
throw new InvalidOperationException("Some Output nodes in-edges failed to complete");
}
}
