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path: root/tests/helper/vm.go
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package helper

import (
    "math/big"

    "github.com/ethereum/eth-go/ethstate"
    "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 }
func (self *Env) State() *ethstate.State { return self.state }

func RunVm(state *ethstate.State, env, exec map[string]string) ([]byte, *big.Int, error) {
    caller := state.GetOrNewStateObject(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)

    return ret, closure.Gas, e
}