private async Task <bool> SignTransactionAsync(
EthereumTransaction tx,
CancellationToken cancellationToken = default)
{
var walletAddress = await _account
.GetAddressAsync(
address : tx.From,
cancellationToken : cancellationToken)
.ConfigureAwait(false);
return(await _account.Wallet
.SignAsync(
tx : tx,
address : walletAddress,
cancellationToken : cancellationToken)
.ConfigureAwait(false));
}
public override async Task RedeemAsync(
Swap swap,
CancellationToken cancellationToken = default)
{
var ethConfig = EthConfig;
var secretResult = await EthereumSwapRedeemedHelper
.IsRedeemedAsync(
swap : swap,
currency : ethConfig,
attempts : MaxRedeemCheckAttempts,
attemptIntervalInSec : RedeemCheckAttemptIntervalInSec,
cancellationToken : cancellationToken)
.ConfigureAwait(false);
if (!secretResult.HasError && secretResult.Value != null)
{
await RedeemConfirmedEventHandler(swap, null, cancellationToken)
.ConfigureAwait(false);
return;
}
if (swap.StateFlags.HasFlag(SwapStateFlags.IsRedeemBroadcast) &&
swap.RedeemTx != null &&
swap.RedeemTx.CreationTime != null &&
swap.RedeemTx.CreationTime.Value.ToUniversalTime() + TimeSpan.FromMinutes(30) > DateTime.UtcNow)
{
// redeem already broadcast
_ = TrackTransactionConfirmationAsync(
swap: swap,
currency: ethConfig,
dataRepository: _account.DataRepository,
txId: swap.RedeemTx.Id,
confirmationHandler: RedeemConfirmedEventHandler,
cancellationToken: cancellationToken);
return;
}
if (swap.IsInitiator)
{
var redeemDeadline = swap.TimeStamp.ToUniversalTime().AddSeconds(DefaultAcceptorLockTimeInSeconds) - RedeemTimeReserve;
if (DateTime.UtcNow > redeemDeadline)
{
Log.Error("Redeem dedline reached for swap {@swap}", swap.Id);
return;
}
}
Log.Debug("Create redeem for swap {@swapId}", swap.Id);
var gasPrice = await ethConfig
.GetGasPriceAsync(cancellationToken)
.ConfigureAwait(false);
var walletAddress = await _account
.GetAddressAsync(swap.RedeemFromAddress, cancellationToken)
.ConfigureAwait(false);
if (walletAddress == null)
{
Log.Error("Can't get address {@address} for redeem from local db", swap.RedeemFromAddress);
return;
}
var feeInEth = ethConfig.GetFeeAmount(ethConfig.RedeemGasLimit, gasPrice);
if (walletAddress.Balance < feeInEth)
{
Log.Error("Insufficient funds for redeem");
return;
}
EthereumTransaction redeemTx;
try
{
await EthereumAccount.AddressLocker
.LockAsync(walletAddress.Address, cancellationToken)
.ConfigureAwait(false);
var nonceResult = await EthereumNonceManager.Instance
.GetNonceAsync(ethConfig, walletAddress.Address, pending : true, cancellationToken : cancellationToken)
.ConfigureAwait(false);
if (nonceResult.HasError)
{
Log.Error("Nonce getting error with code {@code} and description {@description}",
nonceResult.Error.Code,
nonceResult.Error.Description);
return;
}
var message = new RedeemFunctionMessage
{
FromAddress = walletAddress.Address,
HashedSecret = swap.SecretHash,
Secret = swap.Secret,
Nonce = nonceResult.Value,
GasPrice = EthereumConfig.GweiToWei(gasPrice),
};
message.Gas = await EstimateGasAsync(message, new BigInteger(ethConfig.RedeemGasLimit))
.ConfigureAwait(false);
var txInput = message.CreateTransactionInput(ethConfig.SwapContractAddress);
redeemTx = new EthereumTransaction(ethConfig.Name, txInput)
{
Type = BlockchainTransactionType.Output | BlockchainTransactionType.SwapRedeem
};
var signResult = await SignTransactionAsync(redeemTx, cancellationToken)
.ConfigureAwait(false);
if (!signResult)
{
Log.Error("Transaction signing error");
return;
}
swap.RedeemTx = redeemTx;
swap.StateFlags |= SwapStateFlags.IsRedeemSigned;
await UpdateSwapAsync(swap, SwapStateFlags.IsRedeemSigned, cancellationToken)
.ConfigureAwait(false);
await BroadcastTxAsync(swap, redeemTx, cancellationToken)
.ConfigureAwait(false);
}
catch
{
throw;
}
finally
{
EthereumAccount.AddressLocker.Unlock(walletAddress.Address);
}
swap.RedeemTx = redeemTx;
swap.StateFlags |= SwapStateFlags.IsRedeemBroadcast;
await UpdateSwapAsync(swap, SwapStateFlags.IsRedeemBroadcast, cancellationToken)
.ConfigureAwait(false);
_ = TrackTransactionConfirmationAsync(
swap: swap,
currency: ethConfig,
dataRepository: _account.DataRepository,
txId: redeemTx.Id,
confirmationHandler: RedeemConfirmedEventHandler,
cancellationToken: cancellationToken);
}