/// <summary>
/// Creates a new instance of a smart contract by invoking the contract's constructor
/// </summary>
public VmExecutionResult Create(IStateRepository repository, ISmartContractState contractState, byte[] contractCode, object[] parameters, string typeName = null)
{
this.logger.LogTrace("()");
string typeToInstantiate;
ContractByteCode code;
// Decompile the contract execution code
Result <IContractModuleDefinition> moduleResult = this.moduleDefinitionReader.Read(contractCode);
if (moduleResult.IsFailure)
{
this.logger.LogTrace("(-)[CONTRACT_BYTECODE_INVALID]");
return(VmExecutionResult.Error(new ContractErrorMessage("Contract bytecode is not valid IL.")));
}
// Validate contract execution code
using (IContractModuleDefinition moduleDefinition = moduleResult.Value)
{
SmartContractValidationResult validation = moduleDefinition.Validate(this.validator);
// If validation failed, refund the sender any remaining gas.
if (!validation.IsValid)
{
this.logger.LogTrace("(-)[CONTRACT_VALIDATION_FAILED]");
// TODO: List errors by string.
return(VmExecutionResult.Error(new ContractErrorMessage(new SmartContractValidationException(validation.Errors).ToString())));
}
typeToInstantiate = typeName ?? moduleDefinition.ContractType.Name;
var observer = new Observer(contractState.GasMeter, MemoryUnitLimit);
var rewriter = new ObserverRewriter(observer);
moduleDefinition.Rewrite(rewriter);
code = moduleDefinition.ToByteCode();
}
Result <IContract> contractLoadResult = this.Load(
code,
typeToInstantiate,
contractState.Message.ContractAddress.ToUint160(this.network),
contractState);
if (!contractLoadResult.IsSuccess)
{
LogErrorMessage(contractLoadResult.Error);
this.logger.LogTrace("(-)[LOAD_CONTRACT_FAILED]");
return(VmExecutionResult.Error(new ContractErrorMessage(contractLoadResult.Error)));
}
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(invocationResult.ErrorMessage));
}
this.logger.LogTrace("[CREATE_CONTRACT_INSTANTIATION_SUCCEEDED]");
this.logger.LogTrace("(-):{0}={1}", nameof(contract.Address), contract.Address);
return(VmExecutionResult.Success(invocationResult.Return, typeToInstantiate));
}
/// <summary>
/// Creates a new instance of a smart contract by invoking the contract's constructor
/// </summary>
public VmExecutionResult Create(IStateRepository repository,
ISmartContractState contractState,
RuntimeObserver.IGasMeter gasMeter,
byte[] contractCode,
object[] parameters,
string typeName = null)
{
string typeToInstantiate;
ContractByteCode code;
// Decompile the contract execution code
Result <IContractModuleDefinition> moduleResult = this.moduleDefinitionReader.Read(contractCode);
if (moduleResult.IsFailure)
{
this.logger.LogTrace(moduleResult.Error);
this.logger.LogTrace("(-)[CONTRACT_BYTECODE_INVALID]");
return(VmExecutionResult.Fail(VmExecutionErrorKind.LoadFailed, "Contract bytecode is not valid IL."));
}
// Validate contract execution code
using (IContractModuleDefinition moduleDefinition = moduleResult.Value)
{
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.Fail(VmExecutionErrorKind.ValidationFailed, new SmartContractValidationException(validation.Errors).ToString()));
}
typeToInstantiate = typeName ?? moduleDefinition.ContractType.Name;
var observer = new Observer(gasMeter, new MemoryMeter(MemoryUnitLimit));
var rewriter = new ObserverRewriter(observer);
if (!this.Rewrite(moduleDefinition, rewriter))
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.RewriteFailed, "Rewrite module failed"));
}
Result <ContractByteCode> getCodeResult = this.GetByteCode(moduleDefinition);
if (!getCodeResult.IsSuccess)
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.RewriteFailed, "Serialize module failed"));
}
code = getCodeResult.Value;
}
Result <IContract> contractLoadResult = this.Load(
code,
typeToInstantiate,
contractState.Message.ContractAddress.ToUint160(),
contractState);
if (!contractLoadResult.IsSuccess)
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.LoadFailed, contractLoadResult.Error));
}
IContract contract = contractLoadResult.Value;
this.LogExecutionContext(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(GetInvocationVmErrorResult(invocationResult));
}
this.logger.LogTrace("[CREATE_CONTRACT_INSTANTIATION_SUCCEEDED]");
return(VmExecutionResult.Ok(invocationResult.Return, typeToInstantiate));
}
/// <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(IStateRepository repository,
ISmartContractState contractState,
ExecutionContext executionContext,
byte[] contractCode,
object[] parameters,
string typeName = null)
{
// The type and code that will ultimately be executed. Assigned based on which method we use to rewrite contract code.
string typeToInstantiate;
IContract contract;
Observer previousObserver = null;
// Hash the code
byte[] codeHash = HashHelper.Keccak256(contractCode);
uint256 codeHashUint256 = new uint256(codeHash);
// Lets see if we already have an assembly
CachedAssemblyPackage assemblyPackage = this.assemblyCache.Retrieve(codeHashUint256);
if (assemblyPackage != null)
{
// If the assembly is in the cache, keep a reference to its observer around.
// We might be in a nested execution for the same assembly,
// in which case we need to restore the previous observer later.
previousObserver = assemblyPackage.Assembly.GetObserver();
typeToInstantiate = typeName ?? assemblyPackage.Assembly.DeployedType.Name;
Type type = assemblyPackage.Assembly.GetType(typeToInstantiate);
uint160 address = contractState.Message.ContractAddress.ToUint160();
contract = Contract.CreateUninitialized(type, contractState, address);
// TODO: Type not found?
// TODO: Setting observer error?
// TODO: Error instantiating contract?
}
else
{
// Create from scratch
// Validate then rewrite the entirety of the incoming code.
Result <IContractModuleDefinition> moduleResult = this.moduleDefinitionReader.Read(contractCode);
if (moduleResult.IsFailure)
{
this.logger.LogDebug(moduleResult.Error);
this.logger.LogTrace("(-)[CONTRACT_BYTECODE_INVALID]");
return(VmExecutionResult.Fail(VmExecutionErrorKind.LoadFailed,
"Contract bytecode is not valid IL."));
}
using (IContractModuleDefinition moduleDefinition = moduleResult.Value)
{
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.Fail(VmExecutionErrorKind.ValidationFailed,
new SmartContractValidationException(validation.Errors).ToString()));
}
var rewriter = new ObserverInstanceRewriter();
if (!this.Rewrite(moduleDefinition, rewriter))
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.RewriteFailed, "Rewrite module failed"));
}
Result <ContractByteCode> getCodeResult = this.GetByteCode(moduleDefinition);
if (!getCodeResult.IsSuccess)
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.RewriteFailed, "Serialize module failed"));
}
// Everything worked. Assign what will get executed.
typeToInstantiate = typeName ?? moduleDefinition.ContractType.Name;
ContractByteCode code = getCodeResult.Value;
Result <IContract> contractLoadResult = this.Load(
code,
typeToInstantiate,
contractState.Message.ContractAddress.ToUint160(),
contractState);
if (!contractLoadResult.IsSuccess)
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.LoadFailed, contractLoadResult.Error));
}
contract = contractLoadResult.Value;
assemblyPackage = new CachedAssemblyPackage(new ContractAssembly(contract.Type.Assembly));
// Cache this completely validated and rewritten contract to reuse later.
this.assemblyCache.Store(codeHashUint256, assemblyPackage);
}
}
this.LogExecutionContext(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);
// Set Observer and load and execute.
assemblyPackage.Assembly.SetObserver(executionContext.Observer);
// Invoke the constructor of the provided contract code
IContractInvocationResult invocationResult = contract.InvokeConstructor(parameters);
// Always reset the observer, even if the previous was null.
assemblyPackage.Assembly.SetObserver(previousObserver);
if (!invocationResult.IsSuccess)
{
this.logger.LogDebug("CREATE_CONTRACT_INSTANTIATION_FAILED");
return(GetInvocationVmErrorResult(invocationResult));
}
this.logger.LogDebug("CREATE_CONTRACT_INSTANTIATION_SUCCEEDED");
return(VmExecutionResult.Ok(invocationResult.Return, typeToInstantiate));
}
/// <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));
}
