/// <summary>
/// Creates a new instance of a smart contract by invoking the contract's constructor
/// </summary>
public VmExecutionResult Create(IGasMeter gasMeter,
IContractState repository,
ICreateData createData,
ITransactionContext transactionContext,
string typeName = null)
{
this.logger.LogTrace("()");
// TODO: Spend Validation + Creation Fee here.
string typeToInstantiate;
ContractByteCode code;
// Decompile the contract execution code and validate it.
using (IContractModuleDefinition moduleDefinition = this.moduleDefinitionReader.Read(createData.ContractExecutionCode))
{
SmartContractValidationResult validation = moduleDefinition.Validate(this.validator);
// If validation failed, refund the sender any remaining gas.
if (!validation.IsValid)
{
this.logger.LogTrace("(-)[CONTRACT_VALIDATION_FAILED]");
return(VmExecutionResult.Error(gasMeter.GasConsumed, new SmartContractValidationException(validation.Errors)));
}
typeToInstantiate = typeName ?? moduleDefinition.ContractType.Name;
moduleDefinition.InjectConstructorGas();
code = moduleDefinition.ToByteCode();
}
var internalTransferList = new List <TransferInfo>();
uint160 address = this.addressGenerator.GenerateAddress(transactionContext.TransactionHash, transactionContext.GetNonceAndIncrement());
var contractLogger = new ContractLogHolder(this.network);
ISmartContractState contractState = this.SetupState(contractLogger, internalTransferList, gasMeter, repository, transactionContext, address);
Result <IContract> contractLoadResult = this.Load(
code,
typeToInstantiate,
address,
contractState);
if (!contractLoadResult.IsSuccess)
{
// TODO this is temporary until we improve error handling overloads
var exception = new Exception(contractLoadResult.Error);
LogException(exception);
this.logger.LogTrace("(-)[LOAD_CONTRACT_FAILED]:{0}={1}", nameof(gasMeter.GasConsumed), gasMeter.GasConsumed);
return(VmExecutionResult.Error(gasMeter.GasConsumed, exception));
}
IContract contract = contractLoadResult.Value;
LogExecutionContext(this.logger, contract.State.Block, contract.State.Message, contract.Address, createData);
// Create an account for the contract in the state repository.
repository.CreateAccount(contract.Address);
// Invoke the constructor of the provided contract code
IContractInvocationResult invocationResult = contract.InvokeConstructor(createData.MethodParameters);
if (!invocationResult.IsSuccess)
{
this.logger.LogTrace("[CREATE_CONTRACT_INSTANTIATION_FAILED]");
return(VmExecutionResult.Error(gasMeter.GasConsumed, new Exception("Constructor invocation failed!")));
}
this.logger.LogTrace("[CREATE_CONTRACT_INSTANTIATION_SUCCEEDED]");
this.logger.LogTrace("(-):{0}={1}, {2}={3}", nameof(contract.Address), contract.Address, nameof(gasMeter.GasConsumed), gasMeter.GasConsumed);
repository.SetCode(contract.Address, createData.ContractExecutionCode);
repository.SetContractType(contract.Address, contract.Type.Name);
return(VmExecutionResult.CreationSuccess(contract.Address, internalTransferList, gasMeter.GasConsumed, invocationResult.Return, contractLogger.GetRawLogs()));
}
/// <summary>
/// Creates a new instance of a smart contract by invoking the contract's constructor
/// </summary>
public VmExecutionResult Create(IContractState repository, ISmartContractState contractState, byte[] contractCode, object[] parameters, string typeName = null)
{
this.logger.LogTrace("()");
string typeToInstantiate;
ContractByteCode code;
// Decompile the contract execution code and validate it.
using (IContractModuleDefinition moduleDefinition = this.moduleDefinitionReader.Read(contractCode))
{
SmartContractValidationResult validation = moduleDefinition.Validate(this.validator);
// If validation failed, refund the sender any remaining gas.
if (!validation.IsValid)
{
this.logger.LogTrace("(-)[CONTRACT_VALIDATION_FAILED]");
return(VmExecutionResult.Error(new SmartContractValidationException(validation.Errors)));
}
typeToInstantiate = typeName ?? moduleDefinition.ContractType.Name;
moduleDefinition.InjectConstructorGas();
code = moduleDefinition.ToByteCode();
}
Result <IContract> contractLoadResult = this.Load(
code,
typeToInstantiate,
contractState.Message.ContractAddress.ToUint160(this.network),
contractState);
if (!contractLoadResult.IsSuccess)
{
// TODO this is temporary until we improve error handling overloads
var exception = new Exception(contractLoadResult.Error);
LogException(exception);
this.logger.LogTrace("(-)[LOAD_CONTRACT_FAILED]");
return(VmExecutionResult.Error(exception));
}
IContract contract = contractLoadResult.Value;
LogExecutionContext(this.logger, contract.State.Block, contract.State.Message, contract.Address);
// Set the code and the Type before the method is invoked
repository.SetCode(contract.Address, contractCode);
repository.SetContractType(contract.Address, typeToInstantiate);
// Invoke the constructor of the provided contract code
IContractInvocationResult invocationResult = contract.InvokeConstructor(parameters);
if (!invocationResult.IsSuccess)
{
this.logger.LogTrace("[CREATE_CONTRACT_INSTANTIATION_FAILED]");
return(VmExecutionResult.Error(new Exception("Constructor invocation failed!")));
}
this.logger.LogTrace("[CREATE_CONTRACT_INSTANTIATION_SUCCEEDED]");
this.logger.LogTrace("(-):{0}={1}", nameof(contract.Address), contract.Address);
return(VmExecutionResult.Success(invocationResult.Return, typeToInstantiate));
}