public async Task<List<Blake256Hash>> PurchaseTicketsAsync(Account account, Amount spendLimit,
int reqConfs, Address ticketAddress, uint number, Address poolAddress, double poolFees,
uint expiry, Amount txFee, Amount ticketFee, string passphrase)
{
var ticketAddressStr = "";
if (ticketAddress != null)
{
ticketAddressStr = ticketAddress.ToString();
}
var poolAddressStr = "";
if (poolAddress != null)
{
poolAddressStr = poolAddress.ToString();
}
if (poolAddressStr == "")
{
poolFees = 0.0;
}
var client = new WalletService.WalletServiceClient(_channel);
var request = new PurchaseTicketsRequest
{
Passphrase = ByteString.CopyFromUtf8(passphrase),
Account = account.AccountNumber,
SpendLimit = spendLimit,
RequiredConfirmations = (uint)reqConfs,
TicketAddress = ticketAddressStr,
NumTickets = number,
PoolAddress = poolAddressStr,
PoolFees = poolFees,
Expiry = expiry,
TxFee = txFee,
TicketFee = ticketFee,
};
var response = await client.PurchaseTicketsAsync(request, cancellationToken: _tokenSource.Token);
return response.TicketHashes.Select(h => new Blake256Hash(h.ToByteArray())).ToList();
}
public async Task<StakeDifficultyProperties> StakeDifficultyAsync()
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new TicketPriceRequest { };
var response = await client.TicketPriceAsync(request, cancellationToken: _tokenSource.Token);
var properties = new StakeDifficultyProperties
{
HeightForTicketPrice = response.Height,
NextTicketPrice = response.TicketPrice,
};
return properties;
}
public async Task<Tuple<List<UnspentOutput>, Amount>> FundTransactionAsync(
Account account, Amount targetAmount, int requiredConfirmations)
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new FundTransactionRequest
{
Account = account.AccountNumber,
TargetAmount = targetAmount,
RequiredConfirmations = requiredConfirmations,
IncludeImmatureCoinbases = false,
IncludeChangeScript = false,
};
var response = await client.FundTransactionAsync(request, cancellationToken: _tokenSource.Token);
var outputs = response.SelectedOutputs.Select(MarshalUnspentOutput).ToList();
var total = (Amount)response.TotalAmount;
return Tuple.Create(outputs, total);
}
public async Task<Tuple<Transaction, bool>> SignTransactionAsync(string passphrase, Transaction tx)
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new SignTransactionRequest
{
Passphrase = ByteString.CopyFromUtf8(passphrase),
SerializedTransaction = ByteString.CopyFrom(tx.Serialize()),
};
var response = await client.SignTransactionAsync(request, cancellationToken: _tokenSource.Token);
var signedTransaction = Transaction.Deserialize(response.Transaction.ToByteArray());
var complete = response.UnsignedInputIndexes.Count == 0;
return Tuple.Create(signedTransaction, complete);
}
public async Task<NetworkResponse> NetworkAsync()
{
var client = new WalletService.WalletServiceClient(_channel);
return await client.NetworkAsync(new NetworkRequest(), cancellationToken: _tokenSource.Token);
}
public async Task<Blake256Hash> PublishTransactionAsync(byte[] signedTransaction)
{
if (signedTransaction == null)
throw new ArgumentNullException(nameof(signedTransaction));
var client = new WalletService.WalletServiceClient(_channel);
var request = new PublishTransactionRequest
{
SignedTransaction = ByteString.CopyFrom(signedTransaction),
};
var response = await client.PublishTransactionAsync(request, cancellationToken: _tokenSource.Token);
return new Blake256Hash(response.TransactionHash.ToByteArray());
}
public async Task ImportPrivateKeyAsync(Account account, string privateKeyWif, bool rescan, string passphrase)
{
if (privateKeyWif == null)
throw new ArgumentNullException(nameof(privateKeyWif));
if (passphrase == null)
throw new ArgumentNullException(nameof(passphrase));
var client = new WalletService.WalletServiceClient(_channel);
var request = new ImportPrivateKeyRequest
{
Account = account.AccountNumber,
PrivateKeyWif = privateKeyWif,
Rescan = rescan,
Passphrase = ByteString.CopyFromUtf8(passphrase), // Poorly named: this outputs UTF8 from a UTF16 System.String
};
await client.ImportPrivateKeyAsync(request, cancellationToken: _tokenSource.Token);
}
public async Task RescanFromBlockHeightAsync(int beginHeight, Action<int> progressCallback = null)
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new RescanRequest { BeginHeight = beginHeight };
var responseServer = client.Rescan(request, cancellationToken: _tokenSource.Token);
while (await responseServer.ResponseStream.MoveNext())
{
progressCallback?.Invoke(responseServer.ResponseStream.Current.RescannedThrough);
}
}
public async Task<string> NextInternalAddressAsync(Account account)
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new NextAddressRequest
{
Account = account.AccountNumber,
Kind = NextAddressRequest.Types.Kind.Bip0044Internal,
};
var resp = await client.NextAddressAsync(request, cancellationToken: _tokenSource.Token);
return resp.Address;
}
public async Task<Account> NextAccountAsync(string passphrase, string accountName)
{
if (passphrase == null)
throw new ArgumentNullException(nameof(passphrase));
if (accountName == null)
throw new ArgumentNullException(nameof(accountName));
var client = new WalletService.WalletServiceClient(_channel);
var request = new NextAccountRequest
{
Passphrase = ByteString.CopyFromUtf8(passphrase),
AccountName = accountName,
};
var resp = await client.NextAccountAsync(request, cancellationToken: _tokenSource.Token);
return new Account(resp.AccountNumber);
}
/// <summary>
/// Queries the RPC server for the next external BIP0044 address for an account
/// </summary>
/// <param name="account">Account to create address for</param>
/// <returns>Tuple containing the address and pubkey address strings</returns>
public async Task<TupleValue<string, string>> NextExternalAddressAsync(Account account)
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new NextAddressRequest
{
Account = account.AccountNumber,
Kind = NextAddressRequest.Types.Kind.Bip0044External,
};
var resp = await client.NextAddressAsync(request, cancellationToken: _tokenSource.Token);
return TupleValue.Create(resp.Address, resp.PublicKey);
}
public async Task<TransactionSet> GetTransactionsAsync(int minRecentTransactions, int minRecentBlocks)
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new GetTransactionsRequest
{
// TODO: include these. With these uncommented, all transactions are loaded.
//StartingBlockHeight = -minRecentBlocks,
//MinimumRecentTransactions = minRecentTransactions
};
var responseStream = client.GetTransactions(request, cancellationToken: _tokenSource.Token).ResponseStream;
var minedTransactions = new List<Block>();
Dictionary<Blake256Hash, WalletTransaction> unminedTransactions = null;
while (await responseStream.MoveNext())
{
var msg = responseStream.Current;
if (msg.MinedTransactions != null)
minedTransactions.Add(MarshalBlock(msg.MinedTransactions));
else
unminedTransactions = msg.UnminedTransactions.Select(MarshalWalletTransaction).ToDictionary(tx => tx.Hash);
}
return new TransactionSet(minedTransactions, unminedTransactions ?? new Dictionary<Blake256Hash, WalletTransaction>());
}
public async Task<AccountsResponse> AccountsAsync()
{
var client = new WalletService.WalletServiceClient(_channel);
return await client.AccountsAsync(new AccountsRequest(), cancellationToken: _tokenSource.Token);
}
public async Task<StakeInfoProperties> StakeInfoAsync()
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new StakeInfoRequest { };
var response = await client.StakeInfoAsync(request, cancellationToken: _tokenSource.Token);
var properties = new StakeInfoProperties
{
PoolSize = response.PoolSize,
AllMempoolTickets = response.AllMempoolTix,
OwnMempoolTickets = response.OwnMempoolTix,
Immature = response.Immature,
Live = response.Live,
Voted = response.Voted,
Missed = response.Missed,
Revoked = response.Revoked,
Expired = response.Expired,
TotalSubsidy = response.TotalSubsidy,
};
return properties;
}
public async Task ImportScriptAsync(byte[] scriptBytes, bool rescan, int scanFrom, string passphrase)
{
if (scriptBytes == null)
throw new ArgumentNullException(nameof(scriptBytes));
if (passphrase == null)
throw new ArgumentNullException(nameof(passphrase));
var client = new WalletService.WalletServiceClient(_channel);
var request = new ImportScriptRequest
{
Script = ByteString.CopyFrom(scriptBytes),
Rescan = rescan,
Passphrase = ByteString.CopyFromUtf8(passphrase), // Poorly named: this outputs UTF8 from a UTF16 System.String
ScanFrom = scanFrom,
};
await client.ImportScriptAsync(request, cancellationToken: _tokenSource.Token);
}
public async Task LoadActiveDataFiltersAsync()
{
var client = new WalletService.WalletServiceClient(_channel);
var request = new LoadActiveDataFiltersRequest();
await client.LoadActiveDataFiltersAsync(request, cancellationToken: _tokenSource.Token);
}
public async Task RenameAccountAsync(Account account, string newAccountName)
{
if (newAccountName == null)
throw new ArgumentNullException(nameof(newAccountName));
var client = new WalletService.WalletServiceClient(_channel);
var request = new RenameAccountRequest
{
AccountNumber = account.AccountNumber,
NewName = newAccountName,
};
await client.RenameAccountAsync(request, cancellationToken: _tokenSource.Token);
}
/// <summary>
/// Begins synchronization of the client with the remote wallet process.
/// A delegate must be passed to be connected to the wallet's ChangesProcessed event to avoid
/// a race where additional notifications are processed in the sync task before the caller
/// can connect the event. The caller is responsible for disconnecting the delegate from the
/// event handler when finished.
/// </summary>
/// <param name="walletEventHandler">Event handler for changes to wallet as new transactions are processed.</param>
/// <returns>The synced Wallet and the Task that is keeping the wallet in sync.</returns>
public async Task<Tuple<Mutex<Wallet>, Task>> Synchronize(EventHandler<Wallet.ChangesProcessedEventArgs> walletEventHandler)
{
if (walletEventHandler == null)
throw new ArgumentNullException(nameof(walletEventHandler));
TransactionNotifications notifications;
Task notificationsTask;
// TODO: Initialization requests need timeouts.
// Loop until synchronization did not race on a reorg.
while (true)
{
// Begin receiving notifications for new and removed wallet transactions before
// old transactions are downloaded. Any received notifications are saved to
// a buffer and are processed after GetAllTransactionsAsync is awaited.
notifications = new TransactionNotifications(_channel, _tokenSource.Token);
notificationsTask = notifications.ListenAndBuffer();
var networkTask = NetworkAsync();
var accountsTask = AccountsAsync();
var networkResp = await networkTask;
var activeBlockChain = BlockChainIdentity.FromNetworkBits(networkResp.ActiveNetwork);
var txSetTask = GetTransactionsAsync(Wallet.MinRecentTransactions, Wallet.NumRecentBlocks(activeBlockChain));
var txSet = await txSetTask;
var rpcAccounts = await accountsTask;
var lastAccountBlockHeight = rpcAccounts.CurrentBlockHeight;
var lastAccountBlockHash = new Blake256Hash(rpcAccounts.CurrentBlockHash.ToByteArray());
var lastTxBlock = txSet.MinedTransactions.LastOrDefault();
if (lastTxBlock != null)
{
var lastTxBlockHeight = lastTxBlock.Height;
var lastTxBlockHash = lastTxBlock.Hash;
if (lastTxBlockHeight > lastAccountBlockHeight ||
(lastTxBlockHeight == lastAccountBlockHeight && !lastTxBlockHash.Equals(lastAccountBlockHash)))
{
_tokenSource.Cancel();
continue;
}
}
// Read all received notifications thus far and determine if synchronization raced
// on a chain reorganize. Try again if so.
IList<WalletChanges> transactionNotifications;
if (notifications.Buffer.TryReceiveAll(out transactionNotifications))
{
if (transactionNotifications.Any(r => r.DetachedBlocks.Count != 0))
{
_tokenSource.Cancel();
continue;
}
// Skip all attached block notifications that are in blocks lower than the
// block accounts notification. If blocks exist at or past that height,
// the first's hash should equal that from the accounts notification.
//
// This ensures that both notifications contain data that is valid at this
// block.
var remainingNotifications = transactionNotifications
.SelectMany(r => r.AttachedBlocks)
.SkipWhile(b => b.Height < lastAccountBlockHeight)
.ToList();
if (remainingNotifications.Count != 0)
{
if (!remainingNotifications[0].Hash.Equals(lastAccountBlockHash))
{
_tokenSource.Cancel();
continue;
}
}
// TODO: Merge remaining notifications with the transaction set.
// For now, be lazy and start the whole sync over.
if (remainingNotifications.Count > 1)
{
_tokenSource.Cancel();
continue;
}
}
var accounts = rpcAccounts.Accounts.ToDictionary(
a => new Account(a.AccountNumber),
a => new AccountProperties
{
AccountName = a.AccountName,
TotalBalance = a.TotalBalance,
// TODO: uncomment when added to protospec and implemented by wallet.
//ImmatureCoinbaseReward = a.ImmatureBalance,
ExternalKeyCount = a.ExternalKeyCount,
InternalKeyCount = a.InternalKeyCount,
ImportedKeyCount = a.ImportedKeyCount,
});
Func<AccountsResponse.Types.Account, AccountProperties> createProperties = a => new AccountProperties
{
AccountName = a.AccountName,
TotalBalance = a.TotalBalance,
// TODO: uncomment when added to protospec and implemented by wallet.
//ImmatureCoinbaseReward = a.ImmatureBalance,
ExternalKeyCount = a.ExternalKeyCount,
InternalKeyCount = a.InternalKeyCount,
ImportedKeyCount = a.ImportedKeyCount,
};
// This assumes that all but the last account listed in the RPC response are
// BIP0032 accounts, with the same account number as their List index.
var bip0032Accounts = rpcAccounts.Accounts.Take(rpcAccounts.Accounts.Count - 1).Select(createProperties).ToList();
var importedAccount = createProperties(rpcAccounts.Accounts.Last());
var chainTip = new BlockIdentity(lastAccountBlockHash, lastAccountBlockHeight);
var wallet = new Wallet(activeBlockChain, txSet, bip0032Accounts, importedAccount, chainTip);
wallet.ChangesProcessed += walletEventHandler;
var walletMutex = new Mutex<Wallet>(wallet);
var syncTask = Task.Run(async () =>
{
var client = new WalletService.WalletServiceClient(_channel);
var accountsStream = client.AccountNotifications(new AccountNotificationsRequest(), cancellationToken: _tokenSource.Token);
var accountChangesTask = accountsStream.ResponseStream.MoveNext();
var txChangesTask = notifications.Buffer.OutputAvailableAsync();
while (true)
{
var completedTask = await Task.WhenAny(accountChangesTask, txChangesTask);
if (!await completedTask)
{
break;
}
using (var walletGuard = await walletMutex.LockAsync())
{
var w = walletGuard.Instance;
if (completedTask == accountChangesTask)
{
var accountProperties = accountsStream.ResponseStream.Current;
var account = new Account(accountProperties.AccountNumber);
w.UpdateAccountProperties(account, accountProperties.AccountName,
accountProperties.ExternalKeyCount, accountProperties.InternalKeyCount,
accountProperties.ImportedKeyCount);
accountChangesTask = accountsStream.ResponseStream.MoveNext();
}
else if (completedTask == txChangesTask)
{
var changes = notifications.Buffer.Receive();
w.ApplyTransactionChanges(changes);
txChangesTask = notifications.Buffer.OutputAvailableAsync();
}
}
}
await notificationsTask;
});
return Tuple.Create(walletMutex, syncTask);
}
}
public TransactionNotifications(Channel channel, CancellationToken cancelToken)
{
_client = new WalletService.WalletServiceClient(channel);
_buffer = new BufferBlock<WalletChanges>();
_cancelToken = cancelToken;
}
