/// <summary> /// Applies an externally generated contract method call message to the current state. /// </summary> public StateTransitionResult Apply(ExternalCallMessage message) { byte[] contractCode = this.intermediateState.GetCode(message.To); if (contractCode == null || contractCode.Length == 0) { return(StateTransitionResult.Fail((Gas)0, StateTransitionErrorKind.NoCode)); } return(this.ApplyCall(message, contractCode)); }
/// <summary> /// Applies an externally generated contract method call message to the current state. /// </summary> public StateTransitionResult Apply(IState state, ExternalCallMessage message) { byte[] contractCode = state.ContractState.GetCode(message.To); if (contractCode == null || contractCode.Length == 0) { return(StateTransitionResult.Fail((Gas)0, StateTransitionErrorKind.NoCode)); } // For external calls we need to increment the balance state to take into // account any funds sent as part of the original contract invocation transaction. state.AddInitialTransfer(new TransferInfo { Value = message.Amount, To = message.To, From = message.From }); return(this.ApplyCall(state, message, contractCode)); }
/// <summary> /// Applies an externally generated contract method call message to the current state. /// </summary> public StateTransitionResult Apply(IState state, ExternalCallMessage message) { var gasMeter = new GasMeter(message.GasLimit); gasMeter.Spend((Gas)GasPriceList.BaseCost); byte[] contractCode = state.ContractState.GetCode(message.To); if (contractCode == null || contractCode.Length == 0) { return(StateTransitionResult.Fail(gasMeter.GasConsumed, StateTransitionErrorKind.NoCode)); } // For external calls we need to increment the balance state to take into // account any funds sent as part of the original contract invocation transaction. state.AddInitialTransfer(new TransferInfo(message.From, message.To, message.Amount)); return(this.ApplyCall(state, message, contractCode, gasMeter)); }
public IContractExecutionResult Execute(IContractTransactionContext transactionContext) { // Deserialization can't fail because this has already been through SmartContractFormatRule. Result <ContractTxData> callDataDeserializationResult = this.serializer.Deserialize(transactionContext.Data); ContractTxData callData = callDataDeserializationResult.Value; bool creation = callData.IsCreateContract; var block = new Block( transactionContext.BlockHeight, transactionContext.CoinbaseAddress.ToAddress(this.network) ); IState state = this.stateFactory.Create( this.stateRoot, block, transactionContext.TxOutValue, transactionContext.TransactionHash); StateTransitionResult result; IState newState = state.Snapshot(); if (creation) { var message = new ExternalCreateMessage( transactionContext.Sender, transactionContext.TxOutValue, callData.GasLimit, callData.ContractExecutionCode, callData.MethodParameters ); result = this.stateProcessor.Apply(newState, message); } else { var message = new ExternalCallMessage( callData.ContractAddress, transactionContext.Sender, transactionContext.TxOutValue, callData.GasLimit, new MethodCall(callData.MethodName, callData.MethodParameters) ); result = this.stateProcessor.Apply(newState, message); } if (result.IsSuccess) { state.TransitionTo(newState); } bool revert = !result.IsSuccess; Transaction internalTransaction = this.transferProcessor.Process( this.stateRoot, result.Success?.ContractAddress, transactionContext, state.InternalTransfers, revert); bool outOfGas = result.IsFailure && result.Error.Kind == StateTransitionErrorKind.OutOfGas; (Money fee, TxOut refundTxOut) = this.refundProcessor.Process( callData, transactionContext.MempoolFee, transactionContext.Sender, result.GasConsumed, outOfGas); var executionResult = new SmartContractExecutionResult { To = !callData.IsCreateContract ? callData.ContractAddress : null, NewContractAddress = !revert && creation ? result.Success?.ContractAddress : null, ErrorMessage = result.Error?.GetErrorMessage(), Revert = revert, GasConsumed = result.GasConsumed, Return = result.Success?.ExecutionResult, InternalTransaction = internalTransaction, Fee = fee, Refund = refundTxOut, Logs = state.GetLogs(this.contractPrimitiveSerializer) }; return(executionResult); }