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