static Coin CreateTransactionFeeCoin(PubKey destination, NoSqlTransactionRepository txRepo)
{
var bitcoinProviderTransaction = new Transaction()
{
Outputs =
{
new TxOut("0.0001" , destination)
}
};
txRepo.Put(bitcoinProviderTransaction.GetHash(), bitcoinProviderTransaction);
return new Coin(new OutPoint(bitcoinProviderTransaction, 0),
bitcoinProviderTransaction.Outputs[0]);
}
public async Task<bool> EnsurePreviousLoadedAsync(OrderedBalanceChange change)
{
if(!NeedLoading(change))
return true;
var parentIds = change.SpentOutpoints.Select(s => s.Hash).ToArray();
var parents =
await GetTransactionsAsync(false, ColoredBalance, parentIds).ConfigureAwait(false);
var cache = new NoSqlTransactionRepository();
foreach(var parent in parents.Where(p => p != null))
cache.Put(parent.TransactionId, parent.Transaction);
if(change.SpentCoins == null)
{
var success = await change.EnsureSpentCoinsLoadedAsync(cache).ConfigureAwait(false);
if(!success)
return false;
}
if(ColoredBalance && change.ColoredTransaction == null)
{
var indexerRepo = new IndexerColoredTransactionRepository(Configuration);
indexerRepo.Transactions = new CompositeTransactionRepository(new[] { new ReadOnlyTransactionRepository(cache), indexerRepo.Transactions });
var success = await change.EnsureColoredTransactionLoadedAsync(indexerRepo).ConfigureAwait(false);
if(!success)
return false;
}
var entity = change.ToEntity();
if(!change.IsEmpty)
{
await Configuration.GetBalanceTable().ExecuteAsync(TableOperation.Merge(entity)).ConfigureAwait(false);
}
else
{
try
{
await Configuration.GetTransactionTable().ExecuteAsync(TableOperation.Delete(entity)).ConfigureAwait(false);
}
catch(StorageException ex)
{
if(ex.RequestInformation == null || ex.RequestInformation.HttpStatusCode != 404)
throw;
}
}
return true;
}
static void Main(string[] args)
{
var goldGuy = new BitcoinSecret("KyuzoVnpsqW529yzozkzP629wUDBsPmm4QEkh9iKnvw3Dy5JJiNg");
var silverGuy = new BitcoinSecret("L4KvjpqDtdGEn7Lw6HdDQjbg74MwWRrFZMQTgJozeHAKJw5rQ2Kn");
var firstPerson = new BitcoinSecret("5Jnw9Td7PaG6PWBrU7ZCfxyVXsHSsNxdZ9sg5dnZstcr12DLVbJ");
var secondPerson = new BitcoinSecret("5Jn4zJkzS2BWNu7AMRTdSJ6mS7JYfJg27oXKAichaRBbp97ZKks");
var exchangeEntity = new BitcoinSecret("5KA7FeABKmMKerWmkJzYM9FdoqScZEMVcS9u6wvT3EhgF5ZUWv5");
var bitcoinProviderEntity = new BitcoinSecret("5Jcz2A17aAt4bcQP5GEn6itt72JsLwrksNRVKqazy7n284b1bKj");
var issuanceCoinsTransaction = new Transaction()
{
Outputs =
{
new TxOut("1.0", goldGuy.PubKey),
new TxOut("1.0", silverGuy.PubKey),
new TxOut("1.0", firstPerson.PubKey),
new TxOut("1.0", secondPerson.PubKey),
}
};
IssuanceCoin[] issuanceCoins = issuanceCoinsTransaction
.Outputs
.Take(2)
.Select((o, i) => new Coin(new OutPoint(issuanceCoinsTransaction.GetHash(), i), o))
.Select(c => new IssuanceCoin(c))
.ToArray();
var goldIssuanceCoin = issuanceCoins[0];
var silverIssuanceCoin = issuanceCoins[1];
var firstPersonInitialCoin = new Coin(new OutPoint(issuanceCoinsTransaction, 2), issuanceCoinsTransaction.Outputs[2]);
var secondPersonInitialCoin = new Coin(new OutPoint(issuanceCoinsTransaction, 3), issuanceCoinsTransaction.Outputs[3]);
var goldId = goldIssuanceCoin.AssetId;
var silverId = silverIssuanceCoin.AssetId;
var txRepo = new NoSqlTransactionRepository();
txRepo.Put(issuanceCoinsTransaction.GetHash(), issuanceCoinsTransaction);
var ctxRepo = new NoSqlColoredTransactionRepository(txRepo);
TransactionBuilder txBuilder = new TransactionBuilder();
// Issuing gold to first person
// This happens in gold issuer client
Transaction tx = txBuilder
.AddKeys(goldGuy.PrivateKey)
.AddCoins(goldIssuanceCoin)
.IssueAsset(firstPerson.GetAddress(), new AssetMoney(goldId, 20))
.SetChange(goldGuy.GetAddress())
.BuildTransaction(true);
txRepo.Put(tx.GetHash(), tx);
var ctx = tx.GetColoredTransaction(ctxRepo);
var coloredCoins = ColoredCoin.Find(tx, ctx).ToArray();
ColoredCoin firstPersonGoldCoin = coloredCoins[0];
// Issuing silver to second person
// This happens in silver issuer client
txBuilder = new TransactionBuilder();
tx = txBuilder
.AddKeys(silverGuy.PrivateKey)
.AddCoins(silverIssuanceCoin)
.IssueAsset(secondPerson.GetAddress(), new AssetMoney(silverId, 30))
.SetChange(silverGuy.GetAddress())
.BuildTransaction(true);
txRepo.Put(tx.GetHash(), tx);
ctx = tx.GetColoredTransaction(ctxRepo);
coloredCoins = ColoredCoin.Find(tx, ctx).ToArray();
ColoredCoin secondPersonSilverCoin = coloredCoins[0];
// Sending first person gold to exchange
// This happens in first user client
var bitcoinProviderCoin = CreateTransactionFeeCoin(bitcoinProviderEntity.PubKey, txRepo);
txBuilder = new TransactionBuilder();
tx = txBuilder
.AddCoins(bitcoinProviderCoin)
.AddKeys(bitcoinProviderEntity.PrivateKey)
.AddCoins(firstPersonGoldCoin)
.AddKeys(firstPerson.PrivateKey)
.SendAssetToExchange(exchangeEntity.GetAddress(), new AssetMoney(goldId, 5))
.SetChange(firstPerson.PubKey)
.BuildTransaction(true);
txRepo.Put(tx.GetHash(), tx);
ctx = tx.GetColoredTransaction(ctxRepo);
coloredCoins = ColoredCoin.Find(tx, ctx).ToArray();
ColoredCoin firstPersonColoredCoinInExchange = coloredCoins[1];
// Creating the time-locked transaction which the first user can post to the
// network to claim his/her coin from exchange (it works if the exchange does not touch the coins
// This happens in exchange and the transaction is delivered to first user client
bitcoinProviderCoin = CreateTransactionFeeCoin(bitcoinProviderEntity.PubKey, txRepo);
txBuilder = new TransactionBuilder();
tx = txBuilder
.AddCoins(bitcoinProviderCoin)
.AddKeys(bitcoinProviderEntity.PrivateKey)
.AddCoins(firstPersonColoredCoinInExchange)
.AddKeys(firstPerson.PrivateKey)
.SendAsset(firstPerson.PubKey, new AssetMoney(firstPersonColoredCoinInExchange.Amount.Id,
firstPersonColoredCoinInExchange.Amount.Quantity))
.SetChange(exchangeEntity.PubKey)
.SetLockTime(new LockTime(1000000))
.BuildTransaction(true);
string reclaimTransactionForFirstUser = tx.ToHex();
// Create first person exchange request
// This happens in first person client
JObject firstPersonRequestToExchange = CreateExchangeRequest("ExactMatch", goldId.ToString(),
silverId.ToString(), 5, 2);
var firstRequestSignature = firstPerson.PrivateKey.SignMessage(firstPersonRequestToExchange.ToString(Formatting.None));
// Sending second person silver to exchange
// This happens in second person client
bitcoinProviderCoin = CreateTransactionFeeCoin(bitcoinProviderEntity.PubKey, txRepo);
txBuilder = new TransactionBuilder();
tx = txBuilder
.AddCoins(bitcoinProviderCoin)
.AddKeys(bitcoinProviderEntity.PrivateKey)
.AddCoins(secondPersonSilverCoin)
.AddKeys(secondPerson.PrivateKey)
.SendAssetToExchange(exchangeEntity.GetAddress(), new AssetMoney(silverId, 12))
.SetChange(secondPerson.PubKey)
.BuildTransaction(true);
txRepo.Put(tx.GetHash(), tx);
ctx = tx.GetColoredTransaction(ctxRepo);
coloredCoins = ColoredCoin.Find(tx, ctx).ToArray();
ColoredCoin secondPersonColoredCoinInExchange = coloredCoins[1];
// Create second person exchange request
// This happens in second person client
JObject secondPersonRequestToExchange = CreateExchangeRequest("ExactMatch", silverId.ToString(),
goldId.ToString(), 30, 0.5f);
var secondRequestSignature = secondPerson.PrivateKey.SignMessage(secondPersonRequestToExchange.ToString(Formatting.None));
// Creating exchange reason
// This happens in exchange
var exchangeReason = CreateExchangeMatch(firstPersonRequestToExchange, firstRequestSignature,
secondPersonRequestToExchange, secondRequestSignature, exchangeEntity.PrivateKey);
// Performing the exchange operation
// This happens in exchange
bitcoinProviderCoin = CreateTransactionFeeCoin(bitcoinProviderEntity.PubKey, txRepo);
txBuilder = new TransactionBuilder();
tx = txBuilder
.AddCoins(bitcoinProviderCoin)
.AddKeys(bitcoinProviderEntity.PrivateKey)
.AddCoins(firstPersonColoredCoinInExchange)
.AddKeys(exchangeEntity.PrivateKey)
.AddCoins(secondPersonColoredCoinInExchange)
.AddKeys(exchangeEntity.PrivateKey)
.PerformExchangeOperation(firstPerson.GetAddress(), new AssetMoney(silverId, 10),
secondPerson.GetAddress(), new AssetMoney(goldId, 5), exchangeReason.ToString(Formatting.None))
.SetChange(exchangeEntity.GetAddress())
.BuildTransaction(true);
txRepo.Put(tx.GetHash(), tx);
ctx = tx.GetColoredTransaction(ctxRepo);
coloredCoins = ColoredCoin.Find(tx, ctx).ToArray();
txRepo.Put(tx.GetHash(), tx);
}
