private static ExecutionState Runtime_TransferToken(RuntimeVM vm)
{
vm.ExpectStackSize(4);
VMObject temp;
var source = vm.PopAddress();
var destination = vm.PopAddress();
temp = vm.Stack.Pop();
vm.Expect(temp.Type == VMType.String, "expected string for symbol");
var symbol = temp.AsString();
var tokenID = vm.PopNumber("token ID");
vm.TransferToken(symbol, source, destination, tokenID);
return(ExecutionState.Running);
}
private static ExecutionState Nexus_CreatePlatform(RuntimeVM vm)
{
vm.ExpectStackSize(5);
var source = vm.PopAddress();
var name = vm.PopString("name");
var externalAddress = vm.PopString("external address");
var interopAddress = vm.PopAddress();
var symbol = vm.PopString("symbol");
var target = vm.CreatePlatform(source, name, externalAddress, interopAddress, symbol);
var result = new VMObject();
result.SetValue(target);
vm.Stack.Push(result);
return(ExecutionState.Running);
}
private static ExecutionState Runtime_TransferBalance(RuntimeVM vm)
{
vm.ExpectStackSize(3);
var source = vm.PopAddress();
var destination = vm.PopAddress();
var symbol = vm.PopString("symbol");
var token = vm.GetToken(symbol);
vm.Expect(token.IsFungible(), "must be fungible");
var amount = vm.GetBalance(symbol, source);
vm.TransferTokens(symbol, source, destination, amount);
return(ExecutionState.Running);
}
private static ExecutionState Runtime_WriteToken(RuntimeVM vm)
{
vm.ExpectStackSize(3);
VMObject temp;
temp = vm.Stack.Pop();
vm.Expect(temp.Type == VMType.String, "expected string for symbol");
var symbol = temp.AsString();
var tokenID = vm.PopNumber("token ID");
temp = vm.Stack.Pop();
vm.Expect(temp.Type == VMType.Bytes, "expected bytes for ram");
var ram = temp.AsByteArray();
vm.WriteToken(symbol, tokenID, ram);
return(ExecutionState.Running);
}
private static ExecutionState Runtime_MintTokens(RuntimeVM vm)
{
vm.ExpectStackSize(4);
var source = vm.PopAddress();
var destination = vm.PopAddress();
var symbol = vm.PopString("symbol");
var amount = vm.PopNumber("amount");
if (vm.Nexus.HasGenesis)
{
var isMinter = vm.IsMintingAddress(source, symbol);
vm.Expect(isMinter, $"{source} is not a valid minting address for {symbol}");
}
vm.MintTokens(symbol, source, destination, amount);
return(ExecutionState.Running);
}
private static ExecutionState Runtime_TokenGetFlags(RuntimeVM vm)
{
vm.ExpectStackSize(1);
var symbol = vm.PopString("symbol");
if (!vm.TokenExists(symbol))
{
return(ExecutionState.Fault);
}
var token = vm.GetToken(symbol);
var result = new VMObject();
result.SetValue(token.Flags);
vm.Stack.Push(result);
return(ExecutionState.Running);
}
private static ExecutionState Map_Remove(RuntimeVM vm)
{
vm.ExpectStackSize(2);
// for security reasons we don't accept the caller to specify a contract name
var contractName = vm.CurrentContext.Name;
var field = vm.PopString("field");
var mapKey = SmartContract.GetKeyForField(contractName, field, false);
var entry_obj = vm.Stack.Pop();
var entryKey = entry_obj.AsByteArray();
vm.Expect(entryKey.Length > 0, "invalid entry key");
var map = new StorageMap(mapKey, vm.Storage);
map.Remove <byte[]>(entryKey);
return(ExecutionState.Running);
}
private static ExecutionState Data_Set(RuntimeVM vm)
{
vm.ExpectStackSize(2);
// for security reasons we don't accept the caller to specify a contract name
var contractName = vm.CurrentContext.Name;
vm.Expect(vm.ContractDeployed(contractName), $"contract {contractName} is not deployed");
var field = vm.PopString("field");
var key = SmartContract.GetKeyForField(contractName, field, false);
var obj = vm.Stack.Pop();
var valBytes = obj.AsByteArray();
var contractAddress = SmartContract.GetAddressForName(contractName);
vm.CallNativeContext(NativeContractKind.Storage, nameof(StorageContract.WriteData), contractAddress, key, valBytes);
return(ExecutionState.Running);
}
private static ExecutionState Task_Start(RuntimeVM vm)
{
vm.ExpectStackSize(1);
var contractName = vm.PopString("contract");
var methodBytes = vm.PopBytes("method bytes");
var from = vm.PopAddress();
var frequency = (int)vm.PopNumber("frequency");
var mode = vm.PopEnum <TaskFrequencyMode>("mode");
var gasLimit = vm.PopNumber("gas limit");
var method = ContractMethod.FromBytes(methodBytes);
var task = vm.StartTask(from, contractName, method, frequency, mode, gasLimit);
var result = new VMObject();
result.SetValue(task.ID);
vm.Stack.Push(result);
return(ExecutionState.Running);
}
private static ExecutionState Runtime_SwapTokens(RuntimeVM vm)
{
vm.ExpectStackSize(5);
VMObject temp;
temp = vm.Stack.Pop();
vm.Expect(temp.Type == VMType.String, "expected string for target chain");
var targetChain = temp.AsString();
var source = vm.PopAddress();
var destination = vm.PopAddress();
temp = vm.Stack.Pop();
vm.Expect(temp.Type == VMType.String, "expected string for symbol");
var symbol = temp.AsString();
var value = vm.PopNumber("amount");
vm.SwapTokens(vm.Chain.Name, source, targetChain, destination, symbol, value);
return(ExecutionState.Running);
}
// TODO proper exceptions
private static ExecutionState Oracle_Read(RuntimeVM vm)
{
vm.ExpectStackSize(1);
var url = vm.PopString("url");
if (vm.Oracle == null)
{
return(ExecutionState.Fault);
}
url = url.Trim().ToLowerInvariant();
if (string.IsNullOrEmpty(url))
{
return(ExecutionState.Fault);
}
var result = vm.Oracle.Read <byte[]>(vm.Time, /*vm.Transaction.Hash, */ url);
vm.Stack.Push(VMObject.FromObject(result));
return(ExecutionState.Running);
}
private static ExecutionState Runtime_UpgradeContract(RuntimeVM vm)
{
var tx = vm.Transaction;
Throw.IfNull(tx, nameof(tx));
var pow = tx.Hash.GetDifficulty();
vm.Expect(pow >= (int)ProofOfWork.Minimal, "expected proof of work");
vm.ExpectStackSize(1);
var from = vm.PopAddress();
vm.Expect(from.IsUser, "address must be user");
vm.Expect(vm.IsStakeMaster(from), "needs to be master");
vm.Expect(vm.IsWitness(from), "invalid witness");
var contractName = vm.PopString("contractName");
var contractAddress = SmartContract.GetAddressForName(contractName);
var deployed = vm.Chain.IsContractDeployed(vm.Storage, contractAddress);
vm.Expect(deployed, $"{contractName} does not exist");
byte[] script;
ContractInterface abi;
bool isNative = Nexus.IsNativeContract(contractName);
vm.Expect(!isNative, "cannot upgrade native contract");
bool isToken = ValidationUtils.IsValidTicker(contractName);
script = vm.PopBytes("contractScript");
var abiBytes = vm.PopBytes("contractABI");
abi = ContractInterface.FromBytes(abiBytes);
var fuelCost = vm.GetGovernanceValue(Nexus.FuelPerContractDeployTag);
// governance value is in usd fiat, here convert from fiat to fuel amount
fuelCost = vm.GetTokenQuote(DomainSettings.FiatTokenSymbol, DomainSettings.FuelTokenSymbol, fuelCost);
// burn the "cost" tokens
vm.BurnTokens(DomainSettings.FuelTokenSymbol, from, fuelCost);
// ABI validation
ValidateABI(vm, contractName, abi, isNative);
SmartContract oldContract;
if (isToken)
{
oldContract = vm.Nexus.GetTokenContract(vm.Storage, contractName);
}
else
{
oldContract = vm.Chain.GetContractByName(vm.Storage, contractName);
}
vm.Expect(oldContract != null, "could not fetch previous contract");
vm.Expect(abi.Implements(oldContract.ABI), "new abi does not implement all methods of previous abi");
vm.Expect(vm.InvokeTrigger(false, script, contractName, abi, AccountTrigger.OnUpgrade.ToString(), from) == TriggerResult.Success, "OnUpgrade trigger failed");
if (isToken)
{
vm.Nexus.UpgradeTokenContract(vm.RootStorage, contractName, script, abi);
}
else
{
vm.Chain.UpgradeContract(vm.Storage, contractName, script, abi);
}
vm.Notify(EventKind.ContractUpgrade, from, contractName);
return(ExecutionState.Running);
}
private static ExecutionState Runtime_DeployContract(RuntimeVM vm)
{
var tx = vm.Transaction;
Throw.IfNull(tx, nameof(tx));
var pow = tx.Hash.GetDifficulty();
vm.Expect(pow >= (int)ProofOfWork.Minimal, "expected proof of work");
vm.ExpectStackSize(1);
var from = vm.PopAddress();
vm.Expect(from.IsUser, "address must be user");
if (vm.Nexus.HasGenesis)
{
//Runtime.Expect(org != DomainSettings.ValidatorsOrganizationName, "cannot deploy contract via this organization");
vm.Expect(vm.IsStakeMaster(from), "needs to be master");
}
vm.Expect(vm.IsWitness(from), "invalid witness");
var contractName = vm.PopString("contractName");
var contractAddress = SmartContract.GetAddressForName(contractName);
var deployed = vm.Chain.IsContractDeployed(vm.Storage, contractAddress);
// TODO
if (vm.ProtocolVersion >= 2)
{
vm.Expect(!deployed, $"{contractName} is already deployed");
}
else
if (deployed)
{
return(ExecutionState.Running);
}
byte[] script;
ContractInterface abi;
bool isNative = Nexus.IsNativeContract(contractName);
if (isNative)
{
if (contractName == "validator" && vm.GenesisAddress == Address.Null)
{
vm.Nexus.Initialize(from);
}
script = new byte[] { (byte)Opcode.RET };
var contractInstance = vm.Nexus.GetNativeContractByAddress(contractAddress);
abi = contractInstance.ABI;
}
else
{
if (ValidationUtils.IsValidTicker(contractName))
{
throw new VMException(vm, "use createToken instead for this kind of contract");
}
else
{
vm.Expect(ValidationUtils.IsValidIdentifier(contractName), "invalid contract name");
}
var isReserved = ValidationUtils.IsReservedIdentifier(contractName);
if (isReserved && vm.IsWitness(vm.GenesisAddress))
{
isReserved = false;
}
vm.Expect(!isReserved, $"name '{contractName}' reserved by system");
script = vm.PopBytes("contractScript");
var abiBytes = vm.PopBytes("contractABI");
abi = ContractInterface.FromBytes(abiBytes);
var fuelCost = vm.GetGovernanceValue(Nexus.FuelPerContractDeployTag);
// governance value is in usd fiat, here convert from fiat to fuel amount
fuelCost = vm.GetTokenQuote(DomainSettings.FiatTokenSymbol, DomainSettings.FuelTokenSymbol, fuelCost);
// burn the "cost" tokens
vm.BurnTokens(DomainSettings.FuelTokenSymbol, from, fuelCost);
}
// ABI validation
ValidateABI(vm, contractName, abi, isNative);
var success = vm.Chain.DeployContractScript(vm.Storage, from, contractName, contractAddress, script, abi);
vm.Expect(success, $"deployment of {contractName} failed");
var constructor = abi.FindMethod(SmartContract.ConstructorName);
if (constructor != null)
{
vm.CallContext(contractName, constructor, from);
}
vm.Notify(EventKind.ContractDeploy, from, contractName);
return(ExecutionState.Running);
}