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/*
This file is part of go-ethereum
go-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
go-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @authors
* Jeffrey Wilcke <i@jev.io>
*/
package main
import (
"flag"
"fmt"
"log"
"math/big"
"os"
"runtime"
"time"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/ethutil"
"github.com/ethereum/go-ethereum/logger"
"github.com/ethereum/go-ethereum/state"
"github.com/ethereum/go-ethereum/vm"
)
var (
code = flag.String("code", "", "evm code")
loglevel = flag.Int("log", 4, "log level")
gas = flag.String("gas", "1000000000", "gas amount")
price = flag.String("price", "0", "gas price")
value = flag.String("value", "0", "tx value")
dump = flag.Bool("dump", false, "dump state after run")
data = flag.String("data", "", "data")
)
func perr(v ...interface{}) {
fmt.Println(v...)
//os.Exit(1)
}
func main() {
flag.Parse()
logger.AddLogSystem(logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.LogLevel(*loglevel)))
ethutil.ReadConfig("/tmp/evmtest", "/tmp/evm", "")
db, _ := ethdb.NewMemDatabase()
statedb := state.New(nil, db)
sender := statedb.NewStateObject([]byte("sender"))
receiver := statedb.NewStateObject([]byte("receiver"))
//receiver.SetCode([]byte(*code))
receiver.SetCode(ethutil.Hex2Bytes(*code))
vmenv := NewEnv(statedb, []byte("evmuser"), ethutil.Big(*value))
tstart := time.Now()
ret, e := vmenv.Call(sender, receiver.Address(), ethutil.Hex2Bytes(*data), ethutil.Big(*gas), ethutil.Big(*price), ethutil.Big(*value))
logger.Flush()
if e != nil {
perr(e)
}
if *dump {
fmt.Println(string(statedb.Dump()))
}
var mem runtime.MemStats
runtime.ReadMemStats(&mem)
fmt.Printf("vm took %v\n", time.Since(tstart))
fmt.Printf(`alloc: %d
tot alloc: %d
no. malloc: %d
heap alloc: %d
heap objs: %d
num gc: %d
`, mem.Alloc, mem.TotalAlloc, mem.Mallocs, mem.HeapAlloc, mem.HeapObjects, mem.NumGC)
fmt.Printf("%x\n", ret)
}
type VMEnv struct {
state *state.StateDB
block *types.Block
transactor []byte
value *big.Int
depth int
Gas *big.Int
time int64
}
func NewEnv(state *state.StateDB, transactor []byte, value *big.Int) *VMEnv {
return &VMEnv{
state: state,
transactor: transactor,
value: value,
time: time.Now().Unix(),
}
}
func (self *VMEnv) State() *state.StateDB { return self.state }
func (self *VMEnv) Origin() []byte { return self.transactor }
func (self *VMEnv) BlockNumber() *big.Int { return ethutil.Big0 }
func (self *VMEnv) PrevHash() []byte { return make([]byte, 32) }
func (self *VMEnv) Coinbase() []byte { return self.transactor }
func (self *VMEnv) Time() int64 { return self.time }
func (self *VMEnv) Difficulty() *big.Int { return ethutil.Big1 }
func (self *VMEnv) BlockHash() []byte { return make([]byte, 32) }
func (self *VMEnv) Value() *big.Int { return self.value }
func (self *VMEnv) GasLimit() *big.Int { return big.NewInt(1000000000) }
func (self *VMEnv) Depth() int { return 0 }
func (self *VMEnv) SetDepth(i int) { self.depth = i }
func (self *VMEnv) GetHash(n uint64) []byte {
if self.block.Number().Cmp(big.NewInt(int64(n))) == 0 {
return self.block.Hash()
}
return nil
}
func (self *VMEnv) AddLog(log state.Log) {
self.state.AddLog(log)
}
func (self *VMEnv) Transfer(from, to vm.Account, amount *big.Int) error {
return vm.Transfer(from, to, amount)
}
func (self *VMEnv) vm(addr, data []byte, gas, price, value *big.Int) *core.Execution {
return core.NewExecution(self, addr, data, gas, price, value)
}
func (self *VMEnv) Call(caller vm.ContextRef, 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 *VMEnv) CallCode(caller vm.ContextRef, 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 *VMEnv) Create(caller vm.ContextRef, addr, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ContextRef) {
exe := self.vm(addr, data, gas, price, value)
return exe.Create(caller)
}
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