/// <inheritdoc />
public IContractInvocationResult InvokeConstructor(IReadOnlyList <object> parameters)
{
// If it's a constructor we need to append the ISmartContractState to the start of the parameters array
object[] invokeParams = { this.State };
if (parameters != null)
{
invokeParams = invokeParams.Concat(parameters).ToArray();
}
Type[] types = invokeParams.Select(p => p.GetType()).ToArray();
ConstructorInfo methodToInvoke = this.Type.GetConstructor(types);
if (methodToInvoke == null)
{
return(ContractInvocationResult.Failure(ContractInvocationErrorType.MethodDoesNotExist));
}
IContractInvocationResult result = this.InvokeInternal(methodToInvoke, invokeParams);
this.initialized = result.IsSuccess;
return(result);
}
public void SmartContracts_GasInjector_SingleParamConstructorGasInjectedSuccess()
{
ContractCompilationResult compilationResult =
ContractCompiler.Compile(TestSingleConstructorSource);
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes).Value;
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
IContractInvocationResult result = contract.InvokeConstructor(null);
// TODO: Un-hard-code this.
// Constructor: 15
// Property setter: 12
// Storage: 150
// "string newString = this.Owner + 1;": 36
Assert.Equal((Gas)213, this.gasMeter.GasConsumed);
}
public void TestGasInjector_OutOfGasFails()
{
ContractCompilationResult compilationResult = ContractCompiler.CompileFile("SmartContracts/OutOfGasTest.cs");
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
var callData = new MethodCall("UseAllGas");
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes).Value;
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
// Because our contract contains an infinite loop, we want to kill our test after
// some amount of time without achieving a result. 3 seconds is an arbitrarily high enough timeout
// for the method body to have finished execution while minimising the amount of time we spend
// running tests
// If you're running with the debugger on this will obviously be a source of failures
IContractInvocationResult result = TimeoutHelper.RunCodeWithTimeout(5, () => contract.Invoke(callData));
Assert.False(result.IsSuccess);
Assert.Equal((RuntimeObserver.Gas) 0, this.gasMeter.GasAvailable);
Assert.Equal(this.gasMeter.GasLimit, this.gasMeter.GasConsumed);
Assert.Equal(this.gasMeter.GasLimit, this.gasMeter.GasConsumed);
}
public void TestGasInjector_OutOfGasFails()
{
SmartContractCompilationResult compilationResult = SmartContractCompiler.CompileFile("SmartContracts/OutOfGasTest.cs");
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
var callData = new MethodCall("UseAllGas");
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes);
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
IContractInvocationResult result = contract.Invoke(callData);
Assert.False(result.IsSuccess);
Assert.Equal((Gas)0, this.gasMeter.GasAvailable);
Assert.Equal(this.gasMeter.GasLimit, this.gasMeter.GasConsumed);
Assert.Equal(this.gasMeter.GasLimit, this.gasMeter.GasConsumed);
}
public void TestGasInjector_ContractMethodWithRecursion_GasInjectionSucceeds()
{
ContractCompilationResult compilationResult = ContractCompiler.CompileFile("SmartContracts/Recursion.cs");
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
var callData = new MethodCall(nameof(Recursion.DoRecursion));
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes).Value;
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
assembly.Value.SetObserver(new Observer(this.gasMeter, new MemoryMeter(ReflectionVirtualMachine.MemoryUnitLimit)));
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
IContractInvocationResult result = contract.Invoke(callData);
Assert.True(result.IsSuccess);
Assert.True(this.gasMeter.GasConsumed > 0);
}
private void AssertPasses(IContract contract, string methodName)
{
var callData = new MethodCall(methodName);
IContractInvocationResult result = contract.Invoke(callData);
Assert.True(result.IsSuccess);
}
private void AssertFailsDueToMemory(IContract contract, string methodName)
{
var callData = new MethodCall(methodName);
IContractInvocationResult result = contract.Invoke(callData);
Assert.False(result.IsSuccess);
Assert.Equal(ContractInvocationErrorType.OverMemoryLimit, result.InvocationErrorType);
}
public void Invoke_Method_With_Null_Params()
{
var methodCall = new MethodCall("Test1");
IContractInvocationResult result = this.contract.Invoke(methodCall);
Assert.True(result.IsSuccess);
Assert.True(this.instance.Test1Called);
Assert.Equal(0, this.instance.ConstructorCalledCount);
}
public void Invoke_Private_Method_Fails()
{
var methodCall = new MethodCall("TestPrivate");
IContractInvocationResult result = this.contract.Invoke(methodCall);
Assert.False(result.IsSuccess);
Assert.Equal(ContractInvocationErrorType.MethodDoesNotExist, result.InvocationErrorType);
}
public void Invoke_Method_Throws_OutOfGasException()
{
var methodCall = new MethodCall("TestOutOfGas");
IContractInvocationResult result = this.contract.Invoke(methodCall);
Assert.False(result.IsSuccess);
Assert.Equal(ContractInvocationErrorType.OutOfGas, result.InvocationErrorType);
}
public void EmptyMethodName_DoesNot_Invoke_Receive()
{
IContract receiveContract = Contract.CreateUninitialized(typeof(HasNoReceive), this.state, this.address);
var methodCall = MethodCall.Receive();
IContractInvocationResult result = receiveContract.Invoke(methodCall);
Assert.False(result.IsSuccess);
}
public void Invoke_Method_With_Empty_Optional_Param()
{
// Method binding should fail when a method has an optional param that is not provided
var methodCall = new MethodCall("TestOptionalParam");
IContractInvocationResult result = this.contract.Invoke(methodCall);
Assert.False(result.IsSuccess);
Assert.Equal(ContractInvocationErrorType.MethodDoesNotExist, result.InvocationErrorType);
}
public void Invoke_Method_With_Null_Param()
{
var param = (string)null;
var methodCall = new MethodCall("Test2", new object[] { param });
IContractInvocationResult result = this.contract.Invoke(methodCall);
Assert.False(result.IsSuccess);
Assert.Equal(ContractInvocationErrorType.ParameterTypesDontMatch, result.InvocationErrorType);
}
public void Invoke_Constructor_With_Null_Params()
{
IContractInvocationResult result = this.contract.InvokeConstructor(null);
Assert.Equal(ContractInvocationErrorType.None, result.InvocationErrorType);
Assert.True(result.IsSuccess);
// We expect the count to be 2 because we call the constructor when setting up the test as well
Assert.Equal(1, this.instance.ConstructorCalledCount);
Assert.Equal(this.state, this.instance.State);
}
public void Invoke_Method_With_One_Params()
{
var param = 9999;
var methodCall = new MethodCall("Test2", new object[] { param });
IContractInvocationResult result = this.contract.Invoke(methodCall);
Assert.True(result.IsSuccess);
Assert.Equal(param, result.Return);
}
public void EmptyMethodName_Invokes_Receive()
{
IContract receiveContract = Contract.CreateUninitialized(typeof(HasReceive), this.state, this.address);
var receiveInstance = (HasReceive)receiveContract.GetPrivateFieldValue("instance");
var methodCall = MethodCall.Receive();
IContractInvocationResult result = receiveContract.Invoke(methodCall);
Assert.True(result.IsSuccess);
Assert.True(receiveInstance.ReceiveInvoked);
}
public void Non_Existent_Method_DoesNot_Invoke_Receive()
{
IContract receiveContract = Contract.CreateUninitialized(typeof(HasReceive), this.state, this.address);
var receiveInstance = (HasReceive)receiveContract.GetPrivateFieldValue("instance");
var methodCall = new MethodCall("DoesntExist");
IContractInvocationResult result = receiveContract.Invoke(methodCall);
Assert.False(result.IsSuccess);
Assert.False(receiveInstance.ReceiveInvoked);
Assert.Equal(ContractInvocationErrorType.MethodDoesNotExist, result.InvocationErrorType);
}
/// <summary>
/// Invokes a method on an existing smart contract
/// </summary>
public VmExecutionResult ExecuteMethod(ISmartContractState contractState, RuntimeObserver.IGasMeter gasMeter, MethodCall methodCall, byte[] contractCode, string typeName)
{
ContractByteCode code;
// Code we're loading from database - can assume it's valid.
using (IContractModuleDefinition moduleDefinition = this.moduleDefinitionReader.Read(contractCode).Value)
{
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,
typeName,
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);
IContractInvocationResult invocationResult = contract.Invoke(methodCall);
if (!invocationResult.IsSuccess)
{
this.logger.LogTrace("(-)[CALLCONTRACT_INSTANTIATION_FAILED]");
return(GetInvocationVmErrorResult(invocationResult));
}
this.logger.LogTrace("[CALL_CONTRACT_INSTANTIATION_SUCCEEDED]");
return(VmExecutionResult.Ok(invocationResult.Return, typeName));
}
public void Invoke_Constructor_With_Too_Many_Params_None_Correct()
{
IContractInvocationResult result = this.contract.InvokeConstructor(
new List <object>
{
"123", "abc"
});
Assert.Equal(ContractInvocationErrorType.MethodDoesNotExist, result.InvocationErrorType);
Assert.False(result.IsSuccess);
Assert.Equal(0, this.instance.ConstructorCalledCount);
}
public void EmptyMethodName_WithParams_DoesNot_Invoke_Receive()
{
IContract receiveContract = Contract.CreateUninitialized(typeof(HasReceive), this.state, this.address);
var receiveInstance = (HasReceive)receiveContract.GetPrivateFieldValue("instance");
var parameters = new object[] { 1, "1" };
var methodCall = new MethodCall(MethodCall.ExternalReceiveHandlerName, parameters);
IContractInvocationResult result = receiveContract.Invoke(methodCall);
Assert.False(result.IsSuccess);
Assert.False(receiveInstance.ReceiveInvoked);
Assert.Equal(ContractInvocationErrorType.MethodDoesNotExist, result.InvocationErrorType);
}
public void Invoke_Constructor_With_One_Params()
{
var param = 99999;
IContractInvocationResult result = this.contract.InvokeConstructor(new List <object> {
param
});
Assert.Equal(ContractInvocationErrorType.None, result.InvocationErrorType);
Assert.True(result.IsSuccess);
Assert.Equal(1, this.instance.ConstructorCalledCount);
Assert.Equal(param, this.instance.Param);
Assert.Equal(this.state, this.instance.State);
}
private static VmExecutionResult GetInvocationVmErrorResult(IContractInvocationResult invocationResult)
{
if (invocationResult.InvocationErrorType == ContractInvocationErrorType.OutOfGas)
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.OutOfGas, invocationResult.ErrorMessage));
}
if (invocationResult.InvocationErrorType == ContractInvocationErrorType.OverMemoryLimit)
{
return(VmExecutionResult.Fail(VmExecutionErrorKind.OutOfResources, invocationResult.ErrorMessage));
}
return(VmExecutionResult.Fail(VmExecutionErrorKind.InvocationFailed, invocationResult.ErrorMessage));
}
/// <summary>
/// Invokes a method on an existing smart contract
/// </summary>
public VmExecutionResult ExecuteMethod(ISmartContractState contractState, MethodCall methodCall, byte[] contractCode, string typeName)
{
this.logger.LogTrace("(){0}:{1}", nameof(methodCall.Name), methodCall.Name);
ContractByteCode code;
// Code we're loading from database - can assume it's valid.
using (IContractModuleDefinition moduleDefinition = this.moduleDefinitionReader.Read(contractCode).Value)
{
var observer = new Observer(contractState.GasMeter, MemoryUnitLimit);
var rewriter = new ObserverRewriter(observer);
moduleDefinition.Rewrite(rewriter);
code = moduleDefinition.ToByteCode();
}
Result <IContract> contractLoadResult = this.Load(
code,
typeName,
contractState.Message.ContractAddress.ToUint160(this.network),
contractState);
if (!contractLoadResult.IsSuccess)
{
LogErrorMessage(contractLoadResult.Error);
this.logger.LogTrace("(-)[LOAD_CONTRACT_FAILED]");
return(VmExecutionResult.Fail(VmExecutionErrorKind.LoadFailed, contractLoadResult.Error));
}
IContract contract = contractLoadResult.Value;
LogExecutionContext(this.logger, contract.State.Block, contract.State.Message, contract.Address);
IContractInvocationResult invocationResult = contract.Invoke(methodCall);
if (!invocationResult.IsSuccess)
{
this.logger.LogTrace("(-)[CALLCONTRACT_INSTANTIATION_FAILED]");
return(GetInvocationVmErrorResult(invocationResult));
}
this.logger.LogTrace("[CALL_CONTRACT_INSTANTIATION_SUCCEEDED]");
this.logger.LogTrace("(-)");
return(VmExecutionResult.Ok(invocationResult.Return, typeName));
}
/// <summary>
/// Invokes a method on an existing smart contract
/// </summary>
public VmExecutionResult ExecuteMethod(ISmartContractState contractState, MethodCall methodCall, byte[] contractCode, string typeName)
{
this.logger.LogTrace("(){0}:{1}", nameof(methodCall.Name), methodCall.Name);
ContractByteCode code;
using (IContractModuleDefinition moduleDefinition = this.moduleDefinitionReader.Read(contractCode))
{
moduleDefinition.InjectMethodGas(typeName, methodCall);
code = moduleDefinition.ToByteCode();
}
Result <IContract> contractLoadResult = this.Load(
code,
typeName,
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);
IContractInvocationResult invocationResult = contract.Invoke(methodCall);
if (!invocationResult.IsSuccess)
{
this.logger.LogTrace("(-)[CALLCONTRACT_INSTANTIATION_FAILED]");
return(VmExecutionResult.Error(new Exception("Method invocation failed!")));
}
this.logger.LogTrace("[CALL_CONTRACT_INSTANTIATION_SUCCEEDED]");
this.logger.LogTrace("(-)");
return(VmExecutionResult.Success(invocationResult.Return, typeName));
}
public void TestGasInjector_NestedType_GasInjectionSucceeds()
{
ContractCompilationResult compilationResult = ContractCompiler.Compile(@"
using System;
using Stratis.SmartContracts;
public class Test : SmartContract
{
public Test(ISmartContractState state): base(state) {
var other = new Other.NestedOther();
other.Loop();
}
}
public static class Other
{
public struct NestedOther {
public void Loop() { while(true) {}}
}
}
");
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes).Value;
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
assembly.Value.SetObserver(new Observer(this.gasMeter, new MemoryMeter(ReflectionVirtualMachine.MemoryUnitLimit)));
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
IContractInvocationResult result = contract.InvokeConstructor(null);
Assert.False(result.IsSuccess);
Assert.Equal(this.gasMeter.GasLimit, this.gasMeter.GasConsumed);
}
public void SmartContracts_GasInjector_MultipleParamConstructorGasInjectedSuccess()
{
ContractCompilationResult compilationResult =
ContractCompiler.Compile(TestMultipleConstructorSource);
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes).Value;
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
IContractInvocationResult result = contract.InvokeConstructor(new[] { "Test Owner" });
// Number here shouldn't be hardcoded - note this is really only to let us know of consensus failure
Assert.Equal((RuntimeObserver.Gas) 328, this.gasMeter.GasConsumed);
}
public void TestGasInjector()
{
SmartContractCompilationResult compilationResult = SmartContractCompiler.Compile(TestSource);
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
var resolver = new DefaultAssemblyResolver();
resolver.AddSearchDirectory(AppContext.BaseDirectory);
int aimGasAmount;
using (ModuleDefinition moduleDefinition = ModuleDefinition.ReadModule(
new MemoryStream(originalAssemblyBytes),
new ReaderParameters {
AssemblyResolver = resolver
}))
{
TypeDefinition contractType = moduleDefinition.GetType(ContractName);
MethodDefinition testMethod = contractType.Methods.FirstOrDefault(x => x.Name == MethodName);
aimGasAmount =
testMethod?.Body?.Instructions?
.Count ?? 10000000;
}
var callData = new MethodCall("TestMethod", new object[] { 1 });
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes);
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
IContractInvocationResult result = contract.Invoke(callData);
Assert.Equal((ulong)aimGasAmount, this.state.GasMeter.GasConsumed);
}
public void TestGasInjector()
{
ContractCompilationResult compilationResult = ContractCompiler.Compile(TestSource);
Assert.True(compilationResult.Success);
byte[] originalAssemblyBytes = compilationResult.Compilation;
var resolver = new DefaultAssemblyResolver();
resolver.AddSearchDirectory(AppContext.BaseDirectory);
using (ModuleDefinition moduleDefinition = ModuleDefinition.ReadModule(
new MemoryStream(originalAssemblyBytes),
new ReaderParameters {
AssemblyResolver = resolver
}))
{
TypeDefinition contractType = moduleDefinition.GetType(ContractName);
MethodDefinition testMethod = contractType.Methods.FirstOrDefault(x => x.Name == MethodName);
}
var callData = new MethodCall("TestMethod", new object[] { 1 });
IContractModuleDefinition module = this.moduleReader.Read(originalAssemblyBytes).Value;
module.Rewrite(this.rewriter);
CSharpFunctionalExtensions.Result <IContractAssembly> assembly = this.assemblyLoader.Load(module.ToByteCode());
assembly.Value.SetObserver(new Observer(this.gasMeter, new MemoryMeter(ReflectionVirtualMachine.MemoryUnitLimit)));
IContract contract = Contract.CreateUninitialized(assembly.Value.GetType(module.ContractType.Name), this.state, null);
IContractInvocationResult result = contract.Invoke(callData);
// Number here shouldn't be hardcoded - note this is really only to let us know of consensus failure
Assert.Equal(22uL, this.gasMeter.GasConsumed);
}
/// <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));
}
