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package helper
import (
"math/big"
"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 {
state *state.State
origin []byte
parent []byte
coinbase []byte
number *big.Int
time int64
difficulty *big.Int
gasLimit *big.Int
}
func NewEnv(state *state.State) *Env {
return &Env{
state: state,
}
}
func NewEnvFromMap(state *state.State, 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.State { return self.state }
func (self *Env) GasLimit() *big.Int { return self.gasLimit }
func (self *Env) AddLog(*state.Log) {}
func (self *Env) Transfer(from, to vm.Account, amount *big.Int) error {
return vm.Transfer(from, to, amount)
}
func RunVm(state *state.State, env, exec map[string]string) ([]byte, *big.Int, error) {
address := FromHex(exec["address"])
caller := state.GetOrNewStateObject(FromHex(exec["caller"]))
evm := vm.New(NewEnvFromMap(state, env, exec), vm.DebugVmTy)
execution := vm.NewExecution(evm, address, FromHex(exec["data"]), ethutil.Big(exec["gas"]), ethutil.Big(exec["gasPrice"]), ethutil.Big(exec["value"]))
execution.SkipTransfer = true
ret, err := execution.Exec(address, caller)
return ret, execution.Gas, err
}
func RunState(state *state.State, env, tx map[string]string) ([]byte, *big.Int, error) {
address := FromHex(tx["to"])
keyPair, _ := crypto.NewKeyPairFromSec([]byte(ethutil.Hex2Bytes(tx["secretKey"])))
caller := state.GetOrNewStateObject(keyPair.Address())
vmenv := NewEnvFromMap(state, env, tx)
vmenv.origin = caller.Address()
evm := vm.New(vmenv, vm.DebugVmTy)
execution := vm.NewExecution(evm, address, FromHex(tx["data"]), ethutil.Big(tx["gasLimit"]), ethutil.Big(tx["gasPrice"]), ethutil.Big(tx["value"]))
ret, err := execution.Exec(address, caller)
return ret, execution.Gas, err
}
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