/// <inheritdoc />
public ConsolidationSignatureResult CombineSignatures(Transaction incomingPartialTransaction)
{
lock (this.txLock)
{
// Nothing to sign.
if (this.ConsolidationTransactions == null)
{
return(ConsolidationSignatureResult.Failed());
}
// Get matching in-memory transaction.
ConsolidationTransaction inMemoryTransaction = this.GetInMemoryConsolidationTransaction(incomingPartialTransaction);
// Transaction doesn't exist or need signing.
if (inMemoryTransaction == null || inMemoryTransaction.Status != ConsolidationTransactionStatus.Partial)
{
return(ConsolidationSignatureResult.Failed());
}
// Attempt to merge signatures
var builder = new TransactionBuilder(this.network);
Transaction oldTransaction = inMemoryTransaction.PartialTransaction;
this.logger.Debug("Attempting to merge signatures for '{0}' and '{1}'.", inMemoryTransaction.PartialTransaction.GetHash(), incomingPartialTransaction.GetHash());
Transaction newTransaction = SigningUtils.CheckTemplateAndCombineSignatures(builder, inMemoryTransaction.PartialTransaction, new[] { incomingPartialTransaction });
if (oldTransaction.GetHash() == newTransaction.GetHash())
{
// Signing didn't work if the hash is still the same
this.logger.Debug("Signing failed.");
return(ConsolidationSignatureResult.Failed());
}
this.logger.Debug("Successfully signed transaction.");
inMemoryTransaction.PartialTransaction = newTransaction;
// NOTE: We don't need to reserve the transaction. The wallet will be at a standstill whilst this is happening.
// If it is FullySigned, broadcast.
if (this.walletManager.ValidateConsolidatingTransaction(inMemoryTransaction.PartialTransaction, true))
{
inMemoryTransaction.Status = ConsolidationTransactionStatus.FullySigned;
this.logger.Debug("Consolidation transaction is fully signed. Broadcasting '{0}'", inMemoryTransaction.PartialTransaction.GetHash());
this.broadcasterManager.BroadcastTransactionAsync(inMemoryTransaction.PartialTransaction).GetAwaiter().GetResult();
return(ConsolidationSignatureResult.Succeeded(inMemoryTransaction.PartialTransaction));
}
this.logger.Debug("Consolidation transaction not fully signed yet.");
return(ConsolidationSignatureResult.Succeeded(inMemoryTransaction.PartialTransaction));
}
}
/// <summary>
/// Creates a transaction to transfers funds from an old federation to a new federation.
/// </summary>
/// <param name="isSideChain">Indicates whether the <paramref name="network"/> is the sidechain.</param>
/// <param name="network">The network that we are creating the recovery transaction for.</param>
/// <param name="counterChainNetwork">The counterchain network.</param>
/// <param name="dataDirPath">The root folder containing the old federation.</param>
/// <param name="redeemScript">The new redeem script.</param>
/// <param name="password">The password required to generate transactions using the federation wallet.</param>
/// <param name="txTime">Any deposits beyond this UTC date will be ignored when selecting coin inputs.</param>
/// <returns>A funds recovery transaction that moves funds to the new redeem script.</returns>
public FundsRecoveryTransactionModel CreateFundsRecoveryTransaction(bool isSideChain, Network network, Network counterChainNetwork, string dataDirPath, Script redeemScript, string password, DateTime txTime)
{
var model = new FundsRecoveryTransactionModel()
{
Network = network, IsSideChain = isSideChain, RedeemScript = redeemScript
};
// Get the old redeem script from the wallet file.
PayToMultiSigTemplateParameters multisigParams = PayToMultiSigTemplate.Instance.ExtractScriptPubKeyParameters(redeemScript);
string theChain = isSideChain ? "sidechain" : "mainchain";
var nodeSettings = new NodeSettings(network, args: new string[] { $"datadir={dataDirPath}", $"redeemscript={redeemScript}", $"-{theChain}" });
var walletFileStorage = new FileStorage <FederationWallet>(nodeSettings.DataFolder.WalletPath);
FederationWallet wallet = walletFileStorage.LoadByFileName("multisig_wallet.json");
Script oldRedeemScript = wallet.MultiSigAddress.RedeemScript;
PayToMultiSigTemplateParameters oldMultisigParams = PayToMultiSigTemplate.Instance.ExtractScriptPubKeyParameters(oldRedeemScript);
model.oldMultisigAddress = oldRedeemScript.Hash.GetAddress(network);
model.newMultisigAddress = redeemScript.Hash.GetAddress(network);
// Create dummy inputs to avoid errors when constructing FederatedPegSettings.
var extraArgs = new Dictionary <string, string>();
extraArgs[FederatedPegSettings.FederationIpsParam] = oldMultisigParams.PubKeys.Select(p => "0.0.0.0".ToIPEndPoint(nodeSettings.Network.DefaultPort)).Join(",");
var privateKey = Key.Parse(wallet.EncryptedSeed, password, network);
extraArgs[FederatedPegSettings.PublicKeyParam] = privateKey.PubKey.ToHex(network);
(new TextFileConfiguration(extraArgs.Select(i => $"{i.Key}={i.Value}").ToArray())).MergeInto(nodeSettings.ConfigReader);
model.PubKey = privateKey.PubKey;
var dBreezeSerializer = new DBreezeSerializer(network.Consensus.ConsensusFactory);
var blockStore = new BlockRepository(network, nodeSettings.DataFolder, nodeSettings.LoggerFactory, dBreezeSerializer);
blockStore.Initialize();
var chain = new ChainRepository(nodeSettings.DataFolder, nodeSettings.LoggerFactory, dBreezeSerializer);
Block genesisBlock = network.GetGenesis();
ChainedHeader tip = chain.LoadAsync(new ChainedHeader(genesisBlock.Header, genesisBlock.GetHash(), 0)).GetAwaiter().GetResult();
var chainIndexer = new ChainIndexer(network, tip);
var nodeLifetime = new NodeLifetime();
IDateTimeProvider dateTimeProvider = DateTimeProvider.Default;
var federatedPegSettings = new FederatedPegSettings(nodeSettings);
var opReturnDataReader = new OpReturnDataReader(nodeSettings.LoggerFactory, new CounterChainNetworkWrapper(counterChainNetwork));
var walletFeePolicy = new WalletFeePolicy(nodeSettings);
var walletManager = new FederationWalletManager(nodeSettings.LoggerFactory, network, chainIndexer, nodeSettings.DataFolder, walletFeePolicy,
new AsyncProvider(nodeSettings.LoggerFactory, new Signals(nodeSettings.LoggerFactory, new DefaultSubscriptionErrorHandler(nodeSettings.LoggerFactory)), nodeLifetime), nodeLifetime,
dateTimeProvider, federatedPegSettings, new WithdrawalExtractor(nodeSettings.LoggerFactory, federatedPegSettings, opReturnDataReader, network), blockStore);
walletManager.Start();
walletManager.EnableFederationWallet(password);
if (!walletManager.IsFederationWalletActive())
{
throw new ArgumentException($"Could not activate the federation wallet on {network}.");
}
// Retrieves the unspent outputs in deterministic order.
List <Stratis.Features.FederatedPeg.Wallet.UnspentOutputReference> coinRefs = walletManager.GetSpendableTransactionsInWallet().ToList();
// Exclude coins (deposits) beyond the transaction (switch-over) time!
coinRefs = coinRefs.Where(r => r.Transaction.CreationTime < txTime).ToList();
if (!coinRefs.Any())
{
throw new ArgumentException($"There are no coins to recover from the federation wallet on {network}.");
}
Money fee = federatedPegSettings.GetWithdrawalTransactionFee(coinRefs.Count());
var builder = new TransactionBuilder(network);
builder.AddKeys(privateKey);
builder.AddCoins(coinRefs.Select(c => ScriptCoin.Create(network, c.Transaction.Id, (uint)c.Transaction.Index, c.Transaction.Amount, c.Transaction.ScriptPubKey, oldRedeemScript)));
// Split the coins into multiple outputs.
Money amount = coinRefs.Sum(r => r.Transaction.Amount) - fee;
const int numberOfSplits = 10;
Money splitAmount = new Money((long)amount / numberOfSplits);
var recipients = new List <Stratis.Features.FederatedPeg.Wallet.Recipient>();
for (int i = 0; i < numberOfSplits; i++)
{
Money sendAmount = (i != (numberOfSplits - 1)) ? splitAmount : amount - splitAmount * (numberOfSplits - 1);
builder.Send(redeemScript.PaymentScript, sendAmount);
}
builder.SetTimeStamp((uint)(new DateTimeOffset(txTime)).ToUnixTimeSeconds());
builder.CoinSelector = new DeterministicCoinSelector();
builder.SendFees(fee);
model.tx = builder.BuildTransaction(true);
File.WriteAllText(Path.Combine(dataDirPath, $"{network.Name}_{model.PubKey.ToHex(network).Substring(0, 8)}.hex"), model.tx.ToHex(network));
// Merge our transaction with other transactions which have been placed in the data folder.
Transaction oldTransaction = model.tx;
string namePattern = $"{network.Name}_*.hex";
int sigCount = 1;
foreach (string fileName in Directory.EnumerateFiles(dataDirPath, namePattern))
{
Transaction incomingPartialTransaction = network.CreateTransaction(File.ReadAllText(fileName));
// Don't merge with self.
if (incomingPartialTransaction.GetHash() == oldTransaction.GetHash())
{
continue;
}
// Transaction times must match.
if (incomingPartialTransaction is PosTransaction && incomingPartialTransaction.Time != model.tx.Time)
{
Console.WriteLine($"The locally generated transaction is time-stamped differently from the transaction contained in '{fileName}'. The imported signature can't be used.");
continue;
}
// Combine signatures.
Transaction newTransaction = SigningUtils.CheckTemplateAndCombineSignatures(builder, model.tx, new[] { incomingPartialTransaction });
if (oldTransaction.GetHash() == newTransaction.GetHash())
{
Console.WriteLine($"The locally generated transaction is not similar to '{fileName}'. The imported signature can't be used.");
continue;
}
model.tx = newTransaction;
sigCount++;
}
Console.WriteLine($"{sigCount} of {multisigParams.SignatureCount} signatures collected for {network.Name}.");
if (sigCount >= multisigParams.SignatureCount)
{
if (builder.Verify(model.tx))
{
// Write the transaction to file.
File.WriteAllText(Path.Combine(dataDirPath, $"{(txTime > DateTime.Now ? "Preliminary " : "")}{network.Name}Recovery.txt"), model.tx.ToHex(network));
}
else
{
Console.WriteLine("Could not verify the transaction.");
}
}
// Stop the wallet manager to release the database folder.
nodeLifetime.StopApplication();
walletManager.Stop();
return(model);
}