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package helper
import (
"fmt"
"math/big"
"github.com/ethereum/eth-go/ethstate"
"github.com/ethereum/eth-go/ethtrie"
"github.com/ethereum/eth-go/ethutil"
"github.com/ethereum/eth-go/ethvm"
)
type Env struct {
state *ethstate.State
origin []byte
parent []byte
coinbase []byte
number *big.Int
time int64
difficulty *big.Int
}
func NewEnv(state *ethstate.State) *Env {
return &Env{
state: state,
}
}
func NewEnvFromMap(state *ethstate.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["currentTime"]).Int64()
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 }
// This is likely to fail if anything ever gets looked up in the state trie :-)
func (self *Env) State() *ethstate.State { return ethstate.New(ethtrie.New(nil, "")) }
func RunVm(state *ethstate.State, env, exec map[string]string) ([]byte, *big.Int) {
caller := state.NewStateObject(ethutil.Hex2Bytes(exec["caller"]))
callee := state.GetStateObject(ethutil.Hex2Bytes(exec["address"]))
closure := ethvm.NewClosure(nil, caller, callee, callee.Code, ethutil.Big(exec["gas"]), ethutil.Big(exec["gasPrice"]))
vm := ethvm.New(NewEnvFromMap(state, env, exec), ethvm.DebugVmTy)
ret, _, e := closure.Call(vm, nil)
if e != nil {
fmt.Println(e)
}
return ret, closure.Gas
}
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