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package helper
import (
"math/big"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/vm"
)
type Env struct {
depth int
state *state.StateDB
skipTransfer bool
Gas *big.Int
origin []byte
parent []byte
coinbase []byte
number *big.Int
time int64
difficulty *big.Int
gasLimit *big.Int
logs state.Logs
}
func NewEnv(state *state.StateDB) *Env {
return &Env{
state: state,
}
}
func NewEnvFromMap(state *state.StateDB, envValues map[string]string, exeValues map[string]string) *Env {
env := NewEnv(state)
env.origin = ethutil.Hex2Bytes(exeValues["caller"])
env.parent = ethutil.Hex2Bytes(envValues["previousHash"])
env.coinbase = ethutil.Hex2Bytes(envValues["currentCoinbase"])
env.number = ethutil.Big(envValues["currentNumber"])
env.time = ethutil.Big(envValues["currentTimestamp"]).Int64()
env.difficulty = ethutil.Big(envValues["currentDifficulty"])
env.gasLimit = ethutil.Big(envValues["currentGasLimit"])
return env
}
func (self *Env) Origin() []byte { return self.origin }
func (self *Env) BlockNumber() *big.Int { return self.number }
func (self *Env) PrevHash() []byte { return self.parent }
func (self *Env) Coinbase() []byte { return self.coinbase }
func (self *Env) Time() int64 { return self.time }
func (self *Env) Difficulty() *big.Int { return self.difficulty }
func (self *Env) BlockHash() []byte { return nil }
func (self *Env) State() *state.StateDB { return self.state }
func (self *Env) GasLimit() *big.Int { return self.gasLimit }
func (self *Env) AddLog(log *state.Log) {
self.logs = append(self.logs, 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 {
return vm.Transfer(from, to, amount)
}
func (self *Env) vm(addr, data []byte, gas, price, value *big.Int) *core.Execution {
evm := vm.New(self, vm.DebugVmTy)
exec := core.NewExecution(evm, addr, data, gas, price, value)
exec.SkipTransfer = self.skipTransfer
return exec
}
func (self *Env) Call(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
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.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error) {
exe := self.vm(caller.Address(), data, gas, price, value)
return exe.Call(addr, caller)
}
func (self *Env) Create(caller vm.ClosureRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ClosureRef) {
exe := self.vm(addr, data, gas, price, value)
return exe.Create(caller)
}
func RunVm(state *state.StateDB, env, exec map[string]string) ([]byte, state.Logs, *big.Int, error) {
var (
to = FromHex(exec["address"])
from = FromHex(exec["caller"])
data = FromHex(exec["data"])
gas = ethutil.Big(exec["gas"])
price = ethutil.Big(exec["gasPrice"])
value = ethutil.Big(exec["value"])
)
caller := state.GetOrNewStateObject(from)
vmenv := NewEnvFromMap(state, env, exec)
vmenv.skipTransfer = true
ret, err := vmenv.Call(caller, to, data, gas, price, value)
return ret, vmenv.logs, vmenv.Gas, err
}
func RunState(state *state.StateDB, env, tx map[string]string) ([]byte, state.Logs, *big.Int, error) {
var (
keyPair, _ = crypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(tx["secretKey"])))
to = FromHex(tx["to"])
data = FromHex(tx["data"])
gas = ethutil.Big(tx["gasLimit"])
price = ethutil.Big(tx["gasPrice"])
value = ethutil.Big(tx["value"])
)
caller := state.GetOrNewStateObject(keyPair.Address())
vmenv := NewEnvFromMap(state, env, tx)
vmenv.origin = caller.Address()
ret, err := vmenv.Call(caller, to, data, gas, price, value)
return ret, vmenv.logs, vmenv.Gas, err
}
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