/// <summary>
/// Simple transaction that is locked for x amount of hours before being processed
/// </summary>
public static bool SimpleTimeLockContract()
{
//Create a client for our QBitNinja API calls
var client = new QBitNinjaClient(_network);
var contractorPrivateKey = (_contractorHdRoot.Derive(new KeyPath("m/44'/0'/0'/0/0"))).PrivateKey.GetWif(_network);
var contractorSecret = new BitcoinSecret(contractorPrivateKey.ToString(), _network);
var contracteeAddress = BitcoinAddress.Create("n4bEeKENL9rED2cG31TjSNzPs6T15TCq96", _network);
//Calculate all payments and fees
var contracteePaymentAmount = new Money(0.1m, MoneyUnit.BTC);
var minerFee = new Money(0.00007m, MoneyUnit.BTC);
int lockTimeMinutes = 5; // <-- Minutes to wait until transaction is allowed to process
var lockTime = new LockTime(DateTimeOffset.UtcNow.AddMinutes(5));
Console.WriteLine("LockTime set to:" + lockTime.ToString());
//Collect the spendable coins from a previous transction
GetTransactionResponse transactionResponse = client.GetTransaction(uint256.Parse("e4a06cac11b257908a908e90dda19b4b5e3d5a0f172d6b90ad8b0950878507be")).Result;
List <ICoin> receivedCoins = transactionResponse.ReceivedCoins;
OutPoint outPointToSpend = null;
Console.WriteLine("------ Available Coins ------");
Console.WriteLine();
foreach (var coin in receivedCoins)
{
if (coin.TxOut.ScriptPubKey == contractorPrivateKey.ScriptPubKey)
{
outPointToSpend = coin.Outpoint;
Money amount = (Money)coin.Amount;
var paymentScript = coin.TxOut.ScriptPubKey;
var address = paymentScript.GetDestinationAddress(_network);
Console.WriteLine("Amount: " + amount.ToDecimal(MoneyUnit.BTC) + " | " + paymentScript + " | " + address);
Console.WriteLine();
}
}
if (outPointToSpend == null)
{
Console.WriteLine("Transaction does not contain our ScriptPubKey!");
return(false);
}
Console.WriteLine("-----------------------------");
//calculate change amount (not actually used, TransactionBuilder will handle for us):
var txInAmount = (Money)receivedCoins[(int)outPointToSpend.N].Amount;
var changeAmount = txInAmount - contracteePaymentAmount - minerFee;
#region Console Output (Payment Details)
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("------ Payment Details ------");
Console.WriteLine();
Console.WriteLine("Total available: " + txInAmount.ToString() + " btc");
Console.WriteLine();
Console.WriteLine("Total payments: " + contracteePaymentAmount.ToString() + " btc");
Console.WriteLine();
Console.WriteLine("Total fees: " + minerFee.ToString() + " btc");
Console.WriteLine();
Console.WriteLine("Change: " + changeAmount.ToString() + " btc");
Console.WriteLine();
Console.WriteLine("-----------------------------");
Console.WriteLine("");
Console.WriteLine("Press any key to create transaction...");
Console.ReadLine();
#endregion
try
{
//Now we can build a transaction where we send a timelock payment to the contractor
var txBuilder = new TransactionBuilder();
var tx = txBuilder
.AddCoins(receivedCoins)
.AddKeys(contractorSecret.PrivateKey)
.Send(contracteeAddress.ScriptPubKey, contracteePaymentAmount)
.SendFees(minerFee)
.SetChange(contractorSecret.GetAddress())
//.SetLockTime(lockTime)
.BuildTransaction(true);
tx.LockTime = 500123;
if (txBuilder.Verify(tx))
{
Console.WriteLine(tx.ToString());
Console.WriteLine("Timelock contract created, signed and verified!");
Console.WriteLine("");
Console.WriteLine("Press any key to broadcast...");
Console.ReadLine();
//Console.WriteLine();
//Console.WriteLine(tx.ToString()); //<-- Print out entire transaction as JSON
#region Broadcast transaction using NBitcoin with node connection
/*
* //Use Bitnodes to find a node to connect to: https://bitnodes.earn.com/ | https://bitnodes.earn.com/nodes/
* //For Testnet you may have to find a faucet provider that also provides node information.
*
*
* var node = NBitcoin.Protocol.Node.Connect(_network, "52.10.6.141:18333"); //<-- ReadMe has Terminal commands for looking up available Testnet Nodes. All Testnodes use :18333
* node.VersionHandshake();
*
* // var payload = NBitcoin.Protocol.Payload(tx);
*
* //inform the server
* node.SendMessage(new InvPayload(tx));
* Thread.Sleep(1000);
*
* //send the transaction
* node.SendMessage(new TxPayload(tx));
* Thread.Sleep(5000);
*
* node.Disconnect();
*
* Console.WriteLine("Transaction ID: " + tx.GetHash().ToString());
* Console.WriteLine();
*
*/
#endregion
#region Broadcast transaction using QbitServerClient
//Broadcast using QBit server:
BroadcastResponse broadcastResponse = client.Broadcast(tx).Result;
Console.WriteLine("Transaction ID: " + tx.GetHash().ToString());
Console.WriteLine();
if (broadcastResponse.Success)
{
Console.WriteLine("Broadcast succeeded!");
}
else
{
Console.WriteLine("Broadcast Error!");
Console.WriteLine();
Console.WriteLine(broadcastResponse.Error.Reason);
}
#endregion
}
else
{
Console.WriteLine("Timelock contract has some issues.");
}
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
Console.WriteLine();
return(true);
}
public void ToStringTest(LockTime first, string expected)
{
string actual = first.ToString();
Assert.Equal(expected, actual);
}
