/// <summary>
/// try to find "Transfer" event, then add record to db
/// </summary>
/// <param name="notification"></param>
/// <param name="transaction"></param>
/// <param name="block"></param>
/// <param name="snapshot"></param>
/// <returns></returns>
private bool HasTransfer(NotificationInfo notification, Transaction transaction, Block block, SnapshotView snapshot)
{
var assetHash = UInt160.Parse(notification.Contract);
var asset = AssetCache.GetAssetInfo(assetHash, snapshot);
if (asset == null)
{
//not nep5 asset
return(false);
}
var notify = JStackItem.FromJson(notification.State);
if (!(notify.Value is IList <JStackItem> notifyArray) || notifyArray.Count < 4)
{
return(false);
}
if (!"transfer".Equals(notifyArray[0].ValueString, StringComparison.OrdinalIgnoreCase))
{
return(false);
}
var from = notifyArray[1].Value as byte[];
var to = notifyArray[2].Value as byte[];
if (from == null && to == null)
{
return(false);
}
if (!ConvertBigInteger(notifyArray[3], out var amount))
{
return(false);
}
var record = new TransferInfo
{
BlockHeight = block.Index,
From = from == null ? null : new UInt160(from),
To = to == null ? null : new UInt160(to),
Asset = asset.Asset,
Amount = amount,
TxId = transaction.Hash,
TimeStamp = block.Timestamp,
AssetInfo = asset,
};
_db.AddTransfer(record);
if (record.From != null)
{
var fromBalance = record.From.GetBalanceOf(assetHash, snapshot);
_db.UpdateBalance(record.From, asset, fromBalance.Value, snapshot.Height);
}
if (record.To != null && record.To != record.From)
{
var toBalance = record.To.GetBalanceOf(assetHash, snapshot);
_db.UpdateBalance(record.To, asset, toBalance.Value, snapshot.Height);
}
return(true);
}
public static bool ToBigInteger(this JStackItem item, out BigInteger amount)
{
amount = 0;
if (item.TypeCode == ContractParameterType.Integer)
{
amount = (BigInteger)item.Value;
return true;
}
if (item.TypeCode == ContractParameterType.ByteArray)
{
amount = new BigInteger((byte[])item.Value);
return true;
}
return false;
}
private bool ConvertBigInteger(JStackItem item, out BigInteger amount)
{
amount = 0;
if (item.TypeCode == ContractParameterType.Integer)
{
amount = (BigInteger)item.Value;
return(true);
}
if (item.TypeCode == ContractParameterType.ByteArray)
{
amount = new BigInteger((byte[])item.Value);
return(true);
}
return(false);
}
/// <summary>
/// query transaction info
/// </summary>
/// <param name="txId"></param>
/// <returns></returns>
public async Task <object> GetTransaction(UInt256 txId)
{
var snapshot = Helpers.GetDefaultSnapshot();
var transaction = snapshot.GetTransaction(txId);
if (transaction == null)
{
return(Error(ErrorCode.TxIdNotFound));
}
var model = new TransactionModel(transaction);
var txState = snapshot.GetTransactionState(txId);
if (txState != null)
{
Header header = snapshot.GetHeader(txState.BlockIndex);
model.BlockHash = header.Hash;
model.BlockHeight = txState.BlockIndex;
model.Timestamp = header.Timestamp;
model.Confirmations = snapshot.GetHeight() - header.Index + 1;
}
using var db = new TrackDB();
var trans = db.QueryTransfers(new TransferFilter()
{
TxIds = new List <UInt256>()
{
txId
}, PageSize = int.MaxValue
}).List;
model.Transfers = trans.Select(tx => tx.ToTransferModel()).ToList();
var executeResult = db.GetExecuteLog(txId);
if (executeResult?.Notifications.NotEmpty() == true)
{
model.Notifies.AddRange(
executeResult.Notifications.Select(n => new NotifyModel()
{
Contract = n.Contract,
EventName = n.EventName,
State = JStackItem.FromJson(n.State),
}));
}
return(model);
}
/// <summary>
/// query transaction info
/// </summary>
/// <param name="txId"></param>
/// <returns></returns>
public async Task <object> GetTransaction(UInt256 txId)
{
var transaction = Blockchain.Singleton.GetTransaction(txId);
if (transaction == null)
{
return(Error(ErrorCode.TxIdNotFound));
}
var model = new TransactionModel(transaction);
TransactionState txState = Blockchain.Singleton.View.Transactions.TryGet(txId);
if (txState != null)
{
Header header = Blockchain.Singleton.GetHeader(txState.BlockIndex);
model.BlockHash = header.Hash;
model.BlockHeight = txState.BlockIndex;
model.Timestamp = header.Timestamp;
model.Confirmations = Blockchain.Singleton.Height - header.Index + 1;
}
using var db = new TrackDB();
var trans = db.FindTransfer(new TransferFilter()
{
TxIds = new List <UInt256>()
{
txId
}, PageSize = int.MaxValue
}).List;
model.Transfers = trans.Select(tx => tx.ToTransferModel()).ToList();
var executeResult = db.GetExecuteLog(txId);
if (executeResult?.Notifications.NotEmpty() == true)
{
model.Notifies.AddRange(
executeResult.Notifications.Select(n => new NotifyModel()
{
Contract = UInt160.Parse(n.Contract),
State = JStackItem.FromJson(n.State),
}));
}
return(model);
}
public async Task <object> InvokeContract(InvokeContractParameterModel para)
{
if (CurrentWallet == null)
{
return(Error(ErrorCode.WalletNotOpen));
}
if (para.ContractHash == null || para.Method.IsNull())
{
return(Error(ErrorCode.ParameterIsNull));
}
using var snapshot = Blockchain.Singleton.GetSnapshot();
var contract = snapshot.Contracts.TryGet(para.ContractHash);
if (contract == null)
{
return(Error(ErrorCode.UnknownContract));
}
ContractParameter[] contractParameters = null;
try
{
contractParameters = para.Parameters?.Select(p =>
{
return(ContractParameter.FromJson(p));
//var parameterValue = new ContractParameter(p.Type);
//parameterValue.SetValue(p.Value);
//return parameterValue;
}).ToArray();
}
catch (Exception e)
{
return(Error(ErrorCode.InvalidPara));
}
var signers = new List <Cosigner>();
if (para.Cosigners.NotEmpty())
{
signers.AddRange(para.Cosigners.Select(s => new Cosigner()
{
Account = s.Account, Scopes = s.Scopes
}));
}
Transaction tx = null;
using ScriptBuilder sb = new ScriptBuilder();
sb.EmitAppCall(para.ContractHash, para.Method, contractParameters);
try
{
tx = CurrentWallet.InitTransaction(sb.ToArray(), signers.ToArray());
}
catch (InvalidOperationException)
{
return(Error(ErrorCode.EngineFault));
}
catch (Exception ex)
{
if (ex.Message.Contains("Insufficient GAS"))
{
return(Error(ErrorCode.GasNotEnough));
}
throw;
}
var(signSuccess, context) = CurrentWallet.TrySignTx(tx);
if (!signSuccess)
{
return(Error(ErrorCode.SignFail, context.SafeSerialize()));
}
var result = new InvokeResultModel();
using ApplicationEngine engine = ApplicationEngine.Run(tx.Script, tx, testMode: true);
result.VmState = engine.State;
result.GasConsumed = new BigDecimal(tx.SystemFee, NativeContract.GAS.Decimals);
result.ResultStack = engine.ResultStack.Select(p => JStackItem.FromJson(p.ToParameter().ToJson())).ToList();
if (engine.State.HasFlag(VMState.FAULT))
{
return(Error(ErrorCode.EngineFault));
}
if (!para.SendTx)
{
return(result);
}
await tx.Broadcast();
result.TxId = tx.Hash;
return(result);
}
public async Task <object> InvokeContract(InvokeContractParameterModel para)
{
if (CurrentWallet == null)
{
return(Error(ErrorCode.WalletNotOpen));
}
if (para.ContractHash == null || para.Method.IsNull())
{
return(Error(ErrorCode.ParameterIsNull));
}
var contract = para.ContractHash.GetContract();
if (contract == null)
{
return(Error(ErrorCode.UnknownContract));
}
ContractParameter[] contractParameters = null;
try
{
contractParameters = para.Parameters?.Select(JsonToContractParameter).ToArray();
}
catch (Exception e)
{
return(Error(ErrorCode.InvalidPara));
}
var signers = new List <Signer>();
if (para.Cosigners.NotEmpty())
{
signers.AddRange(para.Cosigners.Select(s => new Signer()
{
Account = s.Account, Scopes = s.Scopes, AllowedContracts = new UInt160[0]
}));
}
Transaction tx = null;
using ScriptBuilder sb = new ScriptBuilder();
sb.EmitDynamicCall(para.ContractHash, para.Method, contractParameters);
try
{
tx = CurrentWallet.InitTransaction(sb.ToArray(), null, signers.ToArray());
}
catch (InvalidOperationException ex)
{
return(Error(ErrorCode.EngineFault, $"{ex.Message}\r\n InnerError:{ex.InnerException}"));
}
catch (Exception ex)
{
if (ex.Message.Contains("Insufficient GAS"))
{
return(Error(ErrorCode.GasNotEnough));
}
throw;
}
var(signSuccess, context) = CurrentWallet.TrySignTx(tx);
if (!signSuccess)
{
return(Error(ErrorCode.SignFail, context.SafeSerialize()));
}
var result = new InvokeResultModel();
using ApplicationEngine engine = tx.Script.RunTestMode(null, tx);
result.VmState = engine.State;
result.GasConsumed = new BigDecimal((BigInteger)tx.SystemFee, NativeContract.GAS.Decimals);
result.ResultStack = engine.ResultStack.Select(p => JStackItem.FromJson(p.ToContractParameter().ToJson())).ToList();
result.Notifications = engine.Notifications?.Select(ConvertToEventModel).ToList();
if (engine.State.HasFlag(VMState.FAULT))
{
return(Error(ErrorCode.EngineFault));
}
if (!para.SendTx)
{
return(result);
}
await tx.Broadcast();
result.TxId = tx.Hash;
return(result);
}
