diff options
Diffstat (limited to 'tests/vm.go')
| -rw-r--r-- | tests/vm.go | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/tests/vm.go b/tests/vm.go new file mode 100644 index 000000000..52e498ccc --- /dev/null +++ b/tests/vm.go @@ -0,0 +1,220 @@ +package tests + +import ( + "errors" + "math/big" + + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core" + "github.com/ethereum/go-ethereum/core/state" + "github.com/ethereum/go-ethereum/core/vm" + "github.com/ethereum/go-ethereum/crypto" +) + +type Env struct { + depth int + state *state.StateDB + skipTransfer bool + initial bool + Gas *big.Int + + origin common.Address + //parent common.Hash + coinbase common.Address + + number *big.Int + time int64 + difficulty *big.Int + gasLimit *big.Int + + vmTest bool + logs []vm.StructLog +} + +func NewEnv(state *state.StateDB) *Env { + return &Env{ + state: state, + } +} + +func (self *Env) StructLogs() []vm.StructLog { + return self.logs +} + +func (self *Env) AddStructLog(log vm.StructLog) { + self.logs = append(self.logs, log) +} + +func NewEnvFromMap(state *state.StateDB, envValues map[string]string, exeValues map[string]string) *Env { + env := NewEnv(state) + + env.origin = common.HexToAddress(exeValues["caller"]) + //env.parent = common.Hex2Bytes(envValues["previousHash"]) + env.coinbase = common.HexToAddress(envValues["currentCoinbase"]) + env.number = common.Big(envValues["currentNumber"]) + env.time = common.Big(envValues["currentTimestamp"]).Int64() + env.difficulty = common.Big(envValues["currentDifficulty"]) + env.gasLimit = common.Big(envValues["currentGasLimit"]) + env.Gas = new(big.Int) + + return env +} + +func (self *Env) Origin() common.Address { return self.origin } +func (self *Env) BlockNumber() *big.Int { return self.number } + +//func (self *Env) PrevHash() []byte { return self.parent } +func (self *Env) Coinbase() common.Address { return self.coinbase } +func (self *Env) Time() int64 { return self.time } +func (self *Env) Difficulty() *big.Int { return self.difficulty } +func (self *Env) State() *state.StateDB { return self.state } +func (self *Env) GasLimit() *big.Int { return self.gasLimit } +func (self *Env) VmType() vm.Type { return vm.StdVmTy } +func (self *Env) GetHash(n uint64) common.Hash { + return common.BytesToHash(crypto.Sha3([]byte(big.NewInt(int64(n)).String()))) +} +func (self *Env) AddLog(log *state.Log) { + self.state.AddLog(log) +} +func (self *Env) Depth() int { return self.depth } +func (self *Env) SetDepth(i int) { self.depth = i } +func (self *Env) Transfer(from, to vm.Account, amount *big.Int) error { + if self.skipTransfer { + // ugly hack + if self.initial { + self.initial = false + return nil + } + + if from.Balance().Cmp(amount) < 0 { + return errors.New("Insufficient balance in account") + } + + return nil + } + return vm.Transfer(from, to, amount) +} + +func (self *Env) vm(addr *common.Address, data []byte, gas, price, value *big.Int) *core.Execution { + exec := core.NewExecution(self, addr, data, gas, price, value) + + return exec +} + +func (self *Env) Call(caller vm.ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) { + if self.vmTest && self.depth > 0 { + caller.ReturnGas(gas, price) + + return nil, nil + } + exe := self.vm(&addr, data, gas, price, value) + ret, err := exe.Call(addr, caller) + self.Gas = exe.Gas + + return ret, err + +} +func (self *Env) CallCode(caller vm.ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) { + if self.vmTest && self.depth > 0 { + caller.ReturnGas(gas, price) + + return nil, nil + } + + caddr := caller.Address() + exe := self.vm(&caddr, data, gas, price, value) + return exe.Call(addr, caller) +} + +func (self *Env) Create(caller vm.ContextRef, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ContextRef) { + exe := self.vm(nil, data, gas, price, value) + if self.vmTest { + caller.ReturnGas(gas, price) + + nonce := self.state.GetNonce(caller.Address()) + obj := self.state.GetOrNewStateObject(crypto.CreateAddress(caller.Address(), nonce)) + + return nil, nil, obj + } else { + return exe.Create(caller) + } +} + +func RunVm(state *state.StateDB, env, exec map[string]string) ([]byte, state.Logs, *big.Int, error) { + var ( + to = common.HexToAddress(exec["address"]) + from = common.HexToAddress(exec["caller"]) + data = common.FromHex(exec["data"]) + gas = common.Big(exec["gas"]) + price = common.Big(exec["gasPrice"]) + value = common.Big(exec["value"]) + ) + // Reset the pre-compiled contracts for VM tests. + vm.Precompiled = make(map[string]*vm.PrecompiledAccount) + + caller := state.GetOrNewStateObject(from) + + vmenv := NewEnvFromMap(state, env, exec) + vmenv.vmTest = true + vmenv.skipTransfer = true + vmenv.initial = true + ret, err := vmenv.Call(caller, to, data, gas, price, value) + + return ret, vmenv.state.Logs(), vmenv.Gas, err +} + +func RunState(statedb *state.StateDB, env, tx map[string]string) ([]byte, state.Logs, *big.Int, error) { + var ( + keyPair, _ = crypto.NewKeyPairFromSec([]byte(common.Hex2Bytes(tx["secretKey"]))) + data = common.FromHex(tx["data"]) + gas = common.Big(tx["gasLimit"]) + price = common.Big(tx["gasPrice"]) + value = common.Big(tx["value"]) + nonce = common.Big(tx["nonce"]).Uint64() + caddr = common.HexToAddress(env["currentCoinbase"]) + ) + + var to *common.Address + if len(tx["to"]) > 2 { + t := common.HexToAddress(tx["to"]) + to = &t + } + // Set pre compiled contracts + vm.Precompiled = vm.PrecompiledContracts() + + snapshot := statedb.Copy() + coinbase := statedb.GetOrNewStateObject(caddr) + coinbase.SetGasPool(common.Big(env["currentGasLimit"])) + + message := NewMessage(common.BytesToAddress(keyPair.Address()), to, data, value, gas, price, nonce) + vmenv := NewEnvFromMap(statedb, env, tx) + vmenv.origin = common.BytesToAddress(keyPair.Address()) + ret, _, err := core.ApplyMessage(vmenv, message, coinbase) + if core.IsNonceErr(err) || core.IsInvalidTxErr(err) || state.IsGasLimitErr(err) { + statedb.Set(snapshot) + } + statedb.Update() + + return ret, vmenv.state.Logs(), vmenv.Gas, err +} + +type Message struct { + from common.Address + to *common.Address + value, gas, price *big.Int + data []byte + nonce uint64 +} + +func NewMessage(from common.Address, to *common.Address, data []byte, value, gas, price *big.Int, nonce uint64) Message { + return Message{from, to, value, gas, price, data, nonce} +} + +func (self Message) Hash() []byte { return nil } +func (self Message) From() (common.Address, error) { return self.from, nil } +func (self Message) To() *common.Address { return self.to } +func (self Message) GasPrice() *big.Int { return self.price } +func (self Message) Gas() *big.Int { return self.gas } +func (self Message) Value() *big.Int { return self.value } +func (self Message) Nonce() uint64 { return self.nonce } +func (self Message) Data() []byte { return self.data } |