public async Task RunAsync(IStorageProvider store, ExpressConsensusNode node, bool enableTrace, TextWriter writer, CancellationToken token)
{
if (IsNodeRunning(node))
{
throw new Exception("Node already running");
}
var tcs = new TaskCompletionSource <bool>();
_ = Task.Run(() =>
{
try
{
var linkedToken = CancellationTokenSource.CreateLinkedTokenSource(token);
var defaultAccount = node.Wallet.Accounts.Single(a => a.IsDefault);
using var mutex = new Mutex(true, GLOBAL_PREFIX + defaultAccount.ScriptHash);
var wallet = DevWallet.FromExpressWallet(ProtocolSettings, node.Wallet);
var multiSigAccount = wallet.GetMultiSigAccounts().Single();
var logPlugin = new Node.LogPlugin(writer);
var storageProviderPlugin = new Node.StorageProviderPlugin(store);
var appEngineProvider = enableTrace ? new Node.ApplicationEngineProvider() : null;
var dbftPlugin = new Neo.Consensus.DBFTPlugin(GetConsensusSettings(chain));
var persistencePlugin = new Node.PersistencePlugin(store);
using var neoSystem = new Neo.NeoSystem(ProtocolSettings, storageProviderPlugin.Name);
_ = neoSystem.ActorSystem.ActorOf(EventWrapper <Blockchain.ApplicationExecuted> .Props(OnApplicationExecuted));
var rpcSettings = GetRpcServerSettings(chain, node);
var rpcServer = new Neo.Plugins.RpcServer(neoSystem, rpcSettings);
var expressRpcMethods = new ExpressRpcMethods(neoSystem, store, multiSigAccount.ScriptHash, linkedToken);
rpcServer.RegisterMethods(expressRpcMethods);
rpcServer.RegisterMethods(persistencePlugin);
rpcServer.StartRpcServer();
neoSystem.StartNode(new Neo.Network.P2P.ChannelsConfig
{
Tcp = new IPEndPoint(IPAddress.Loopback, node.TcpPort),
WebSocket = new IPEndPoint(IPAddress.Loopback, node.WebSocketPort),
});
dbftPlugin.Start(wallet);
// DevTracker looks for a string that starts with "Neo express is running" to confirm that the instance has started
// Do not remove or re-word this console output:
writer.WriteLine($"Neo express is running ({store.GetType().Name})");
linkedToken.Token.WaitHandle.WaitOne();
}
catch (Exception ex)
{
tcs.SetException(ex);
}
finally
{
tcs.TrySetResult(true);
}
});
await tcs.Task.ConfigureAwait(false);
public JObject ExpressEnumNotifications(JArray @params)
{
var contracts = ((JArray)@params[0]).Select(j => UInt160.Parse(j.AsString())).ToHashSet();
var events = ((JArray)@params[1]).Select(j => j.AsString()).ToHashSet(StringComparer.OrdinalIgnoreCase);
int skip = @params.Count >= 3 ? (int)@params[2].AsNumber() : 0;
int take = @params.Count >= 4 ? (int)@params[3].AsNumber() : MAX_NOTIFICATIONS;
if (take > MAX_NOTIFICATIONS)
{
take = MAX_NOTIFICATIONS;
}
var notifications = PersistencePlugin
.GetNotifications(
storageProvider,
SeekDirection.Backward,
contracts.Count > 0 ? contracts : null,
events.Count > 0 ? events : null)
.Skip(skip);
var count = 0;
var jsonNotifications = new JArray();
var truncated = false;
foreach (var(blockIndex, _, notification) in notifications)
{
if (count++ > take)
{
truncated = true;
break;
}
var jNotification = new JObject
{
["block-index"] = blockIndex,
["script-hash"] = notification.ScriptHash.ToString(),
["event-name"] = notification.EventName,
["inventory-type"] = (byte)notification.InventoryType,
["inventory-hash"] = notification.InventoryHash.ToString(),
["state"] = Neo.VM.Helper.ToJson(notification.State),
};
jsonNotifications.Add(jNotification);
}
return(new JObject
{
["truncated"] = truncated,
["notifications"] = jsonNotifications,
});
}
public OfflineNode(ProtocolSettings settings, RocksDbStorageProvider rocksDbStorageProvider, Wallet nodeWallet, ExpressChain chain, bool enableTrace)
{
this.nodeWallet = nodeWallet;
this.chain = chain;
this.rocksDbStorageProvider = rocksDbStorageProvider;
applicationEngineProvider = enableTrace ? new ApplicationEngineProvider() : null;
consensusNodesKeys = new Lazy <KeyPair[]>(() => chain.GetConsensusNodeKeys());
var storageProviderPlugin = new StorageProviderPlugin(rocksDbStorageProvider);
_ = new PersistencePlugin(rocksDbStorageProvider);
neoSystem = new NeoSystem(settings, storageProviderPlugin.Name);
ApplicationEngine.Log += OnLog !;
}
public JObject GetNep17Balances(JArray @params)
{
var address = AsScriptHash(@params[0]);
using var snapshot = neoSystem.GetSnapshot();
// collect the non-zero balances of all the deployed Nep17 contracts for the specified account
var addressBalances = TokenContract.Enumerate(snapshot)
.Where(c => c.standard == TokenStandard.Nep17)
.Select(c => (
scriptHash: c.scriptHash,
balance: snapshot.GetNep17Balance(c.scriptHash, address, neoSystem.Settings)))
.Where(t => !t.balance.IsZero)
.ToList();
// collect the last block index a transfer occurred for all account balances
var updateIndexes = new Dictionary <UInt160, uint>();
if (addressBalances.Count > 0)
{
var notifications = PersistencePlugin.GetNotifications(
storageProvider,
SeekDirection.Backward,
addressBalances.Select(b => b.scriptHash).ToHashSet(),
TRANSFER);
foreach (var(blockIndex, _, notification) in notifications)
{
// iterate backwards thru the notifications looking for all the Transfer events from a contract
// in assets where a Transfer event hasn't already been recorded
if (!updateIndexes.ContainsKey(notification.ScriptHash))
{
var transfer = TransferNotificationRecord.Create(notification);
if (transfer is not null &&
(transfer.From == address || transfer.To == address))
{
// if the specified account was the sender or receiver of the current transfer,
// record the update index. Stop the iteration if indexes for all the assets are
// have been recorded
updateIndexes.Add(notification.ScriptHash, blockIndex);
if (updateIndexes.Count == addressBalances.Count)
{
break;
}
}
}
}
}
var balances = new JArray();
for (int i = 0; i < addressBalances.Count; i++)
{
var(scriptHash, balance) = addressBalances[i];
var lastUpdatedBlock = updateIndexes.TryGetValue(scriptHash, out var _index) ? _index : 0;
balances.Add(new JObject
{
["assethash"] = scriptHash.ToString(),
["amount"] = balance.ToString(),
["lastupdatedblock"] = lastUpdatedBlock,
});
}
return(new JObject
{
["address"] = address.ToAddress(neoSystem.Settings.AddressVersion),
["balance"] = balances,
});
}
public JObject GetApplicationLog(JArray _params)
{
UInt256 hash = UInt256.Parse(_params[0].AsString());
return(PersistencePlugin.GetAppLog(storageProvider, hash) ?? throw new RpcException(-100, "Unknown transaction"));
}