plugeth/tests/vm_test_util.go

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package tests
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import (
"bytes"
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"errors"
"fmt"
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"math/big"
"strconv"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
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// "github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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// "github.com/ethereum/go-ethereum/logger"
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)
type Account struct {
Balance string
Code string
Nonce string
Storage map[string]string
}
type Log struct {
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AddressF string `json:"address"`
DataF string `json:"data"`
TopicsF []string `json:"topics"`
BloomF string `json:"bloom"`
}
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func (self Log) Address() []byte { return common.Hex2Bytes(self.AddressF) }
func (self Log) Data() []byte { return common.Hex2Bytes(self.DataF) }
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func (self Log) RlpData() interface{} { return nil }
func (self Log) Topics() [][]byte {
t := make([][]byte, len(self.TopicsF))
for i, topic := range self.TopicsF {
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t[i] = common.Hex2Bytes(topic)
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}
return t
}
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func StateObjectFromAccount(db common.Database, addr string, account Account) *state.StateObject {
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obj := state.NewStateObject(common.HexToAddress(addr), db)
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obj.SetBalance(common.Big(account.Balance))
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if common.IsHex(account.Code) {
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account.Code = account.Code[2:]
}
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obj.SetCode(common.Hex2Bytes(account.Code))
obj.SetNonce(common.Big(account.Nonce).Uint64())
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return obj
}
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type VmEnv struct {
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CurrentCoinbase string
CurrentDifficulty string
CurrentGasLimit string
CurrentNumber string
CurrentTimestamp interface{}
PreviousHash string
}
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type VmTest struct {
Callcreates interface{}
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//Env map[string]string
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Env VmEnv
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Exec map[string]string
Transaction map[string]string
Logs []Log
Gas string
Out string
Post map[string]Account
Pre map[string]Account
PostStateRoot string
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}
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func RunVmTest(p string, t *testing.T) {
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tests := make(map[string]VmTest)
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CreateFileTests(t, p, &tests)
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for name, test := range tests {
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/*
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vm.Debug = true
glog.SetV(4)
glog.SetToStderr(true)
if name != "Call50000_sha256" {
continue
}
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*/
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db, _ := ethdb.NewMemDatabase()
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statedb := state.New(common.Hash{}, db)
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for addr, account := range test.Pre {
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obj := StateObjectFromAccount(db, addr, account)
statedb.SetStateObject(obj)
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for a, v := range account.Storage {
obj.SetState(common.HexToHash(a), common.HexToHash(v))
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}
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}
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// XXX Yeah, yeah...
env := make(map[string]string)
env["currentCoinbase"] = test.Env.CurrentCoinbase
env["currentDifficulty"] = test.Env.CurrentDifficulty
env["currentGasLimit"] = test.Env.CurrentGasLimit
env["currentNumber"] = test.Env.CurrentNumber
env["previousHash"] = test.Env.PreviousHash
if n, ok := test.Env.CurrentTimestamp.(float64); ok {
env["currentTimestamp"] = strconv.Itoa(int(n))
} else {
env["currentTimestamp"] = test.Env.CurrentTimestamp.(string)
}
var (
ret []byte
gas *big.Int
err error
logs state.Logs
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)
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ret, logs, gas, err = RunVm(statedb, env, test.Exec)
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// Compare expectedand actual return
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rexp := common.FromHex(test.Out)
if bytes.Compare(rexp, ret) != 0 {
t.Errorf("%s's return failed. Expected %x, got %x\n", name, rexp, ret)
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}
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// Check gas usage
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if len(test.Gas) == 0 && err == nil {
t.Errorf("%s's gas unspecified, indicating an error. VM returned (incorrectly) successfull", name)
} else {
gexp := common.Big(test.Gas)
if gexp.Cmp(gas) != 0 {
t.Errorf("%s's gas failed. Expected %v, got %v\n", name, gexp, gas)
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}
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}
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// check post state
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for addr, account := range test.Post {
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obj := statedb.GetStateObject(common.HexToAddress(addr))
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if obj == nil {
continue
}
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for addr, value := range account.Storage {
v := obj.GetState(common.HexToHash(addr))
vexp := common.HexToHash(value)
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if v != vexp {
t.Errorf("%s's : (%x: %s) storage failed. Expected %x, got %x (%v %v)\n", name, obj.Address().Bytes()[0:4], addr, vexp, v, vexp.Big(), v.Big())
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}
}
}
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// check logs
if len(test.Logs) > 0 {
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CheckLogs(test.Logs, logs, t)
}
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fmt.Println("VM test passed: ", name)
//fmt.Println(string(statedb.Dump()))
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}
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// logger.Flush()
}
type Env struct {
depth int
state *state.StateDB
skipTransfer bool
initial bool
Gas *big.Int
origin common.Address
//parent common.Hash
coinbase common.Address
number *big.Int
time int64
difficulty *big.Int
gasLimit *big.Int
logs state.Logs
vmTest bool
}
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 = common.HexToAddress(exeValues["caller"])
//env.parent = common.Hex2Bytes(envValues["previousHash"])
env.coinbase = common.HexToAddress(envValues["currentCoinbase"])
env.number = common.Big(envValues["currentNumber"])
env.time = common.Big(envValues["currentTimestamp"]).Int64()
env.difficulty = common.Big(envValues["currentDifficulty"])
env.gasLimit = common.Big(envValues["currentGasLimit"])
env.Gas = new(big.Int)
return env
}
func (self *Env) Origin() common.Address { return self.origin }
func (self *Env) BlockNumber() *big.Int { return self.number }
//func (self *Env) PrevHash() []byte { return self.parent }
func (self *Env) Coinbase() common.Address { return self.coinbase }
func (self *Env) Time() int64 { return self.time }
func (self *Env) Difficulty() *big.Int { return self.difficulty }
func (self *Env) State() *state.StateDB { return self.state }
func (self *Env) GasLimit() *big.Int { return self.gasLimit }
func (self *Env) VmType() vm.Type { return vm.StdVmTy }
func (self *Env) GetHash(n uint64) common.Hash {
return common.BytesToHash(crypto.Sha3([]byte(big.NewInt(int64(n)).String())))
}
func (self *Env) AddLog(log *state.Log) {
self.state.AddLog(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 {
if self.skipTransfer {
// ugly hack
if self.initial {
self.initial = false
return nil
}
if from.Balance().Cmp(amount) < 0 {
return errors.New("Insufficient balance in account")
}
return nil
}
return vm.Transfer(from, to, amount)
}
func (self *Env) vm(addr *common.Address, data []byte, gas, price, value *big.Int) *core.Execution {
exec := core.NewExecution(self, addr, data, gas, price, value)
return exec
}
func (self *Env) Call(caller vm.ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
if self.vmTest && self.depth > 0 {
caller.ReturnGas(gas, price)
return nil, nil
}
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.ContextRef, addr common.Address, data []byte, gas, price, value *big.Int) ([]byte, error) {
if self.vmTest && self.depth > 0 {
caller.ReturnGas(gas, price)
return nil, nil
}
caddr := caller.Address()
exe := self.vm(&caddr, data, gas, price, value)
return exe.Call(addr, caller)
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}
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func (self *Env) Create(caller vm.ContextRef, data []byte, gas, price, value *big.Int) ([]byte, error, vm.ContextRef) {
exe := self.vm(nil, data, gas, price, value)
if self.vmTest {
caller.ReturnGas(gas, price)
nonce := self.state.GetNonce(caller.Address())
obj := self.state.GetOrNewStateObject(crypto.CreateAddress(caller.Address(), nonce))
return nil, nil, obj
} else {
return exe.Create(caller)
}
}
func RunVm(state *state.StateDB, env, exec map[string]string) ([]byte, state.Logs, *big.Int, error) {
var (
to = common.HexToAddress(exec["address"])
from = common.HexToAddress(exec["caller"])
data = common.FromHex(exec["data"])
gas = common.Big(exec["gas"])
price = common.Big(exec["gasPrice"])
value = common.Big(exec["value"])
)
// Reset the pre-compiled contracts for VM tests.
vm.Precompiled = make(map[string]*vm.PrecompiledAccount)
caller := state.GetOrNewStateObject(from)
vmenv := NewEnvFromMap(state, env, exec)
vmenv.vmTest = true
vmenv.skipTransfer = true
vmenv.initial = true
ret, err := vmenv.Call(caller, to, data, gas, price, value)
return ret, vmenv.state.Logs(), vmenv.Gas, err
}
type Message struct {
from common.Address
to *common.Address
value, gas, price *big.Int
data []byte
nonce uint64
}
func NewMessage(from common.Address, to *common.Address, data []byte, value, gas, price *big.Int, nonce uint64) Message {
return Message{from, to, value, gas, price, data, nonce}
}
func (self Message) Hash() []byte { return nil }
func (self Message) From() (common.Address, error) { return self.from, nil }
func (self Message) To() *common.Address { return self.to }
func (self Message) GasPrice() *big.Int { return self.price }
func (self Message) Gas() *big.Int { return self.gas }
func (self Message) Value() *big.Int { return self.value }
func (self Message) Nonce() uint64 { return self.nonce }
func (self Message) Data() []byte { return self.data }