path: root/tests/state_test_util.go

// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package tests

import (
    "bytes"
    "encoding/hex"
    "fmt"
    "io"
    "math/big"
    "strconv"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/core"
    "github.com/ethereum/go-ethereum/core/state"
    "github.com/ethereum/go-ethereum/core/vm"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/logger/glog"
)

func RunStateTestWithReader(r io.Reader, skipTests []string) error {
    tests := make(map[string]VmTest)
    if err := readJson(r, &tests); err != nil {
        return err
    }

    if err := runStateTests(tests, skipTests); err != nil {
        return err
    }

    return nil
}

func RunStateTest(p string, skipTests []string) error {
    tests := make(map[string]VmTest)
    if err := readJsonFile(p, &tests); err != nil {
        return err
    }

    if err := runStateTests(tests, skipTests); err != nil {
        return err
    }

    return nil

}

func runStateTests(tests map[string]VmTest, skipTests []string) error {
    skipTest := make(map[string]bool, len(skipTests))
    for _, name := range skipTests {
        skipTest[name] = true
    }

    for name, test := range tests {
        if skipTest[name] {
            glog.Infoln("Skipping state test", name)
            return nil
        }

        if err := runStateTest(test); err != nil {
            return fmt.Errorf("%s: %s\n", name, err.Error())
        }

        glog.Infoln("State test passed: ", name)
        //fmt.Println(string(statedb.Dump()))
    }
    return nil

}

func runStateTest(test VmTest) error {
    db, _ := ethdb.NewMemDatabase()
    statedb := state.New(common.Hash{}, db)
    for addr, account := range test.Pre {
        obj := StateObjectFromAccount(db, addr, account)
        statedb.SetStateObject(obj)
        for a, v := range account.Storage {
            obj.SetState(common.HexToHash(a), common.HexToHash(v))
        }
    }

    // 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
    )

    ret, logs, _, _ = RunState(statedb, env, test.Transaction)

    // // Compare expected  and actual return
    rexp := common.FromHex(test.Out)
    if bytes.Compare(rexp, ret) != 0 {
        return fmt.Errorf("return failed. Expected %x, got %x\n", rexp, ret)
    }

    // check post state
    for addr, account := range test.Post {
        obj := statedb.GetStateObject(common.HexToAddress(addr))
        if obj == nil {
            continue
        }

        if obj.Balance().Cmp(common.Big(account.Balance)) != 0 {
            return fmt.Errorf("(%x) balance failed. Expected %v, got %v => %v\n", obj.Address().Bytes()[:4], account.Balance, obj.Balance(), new(big.Int).Sub(common.Big(account.Balance), obj.Balance()))
        }

        if obj.Nonce() != common.String2Big(account.Nonce).Uint64() {
            return fmt.Errorf("(%x) nonce failed. Expected %v, got %v\n", obj.Address().Bytes()[:4], account.Nonce, obj.Nonce())
        }

        for addr, value := range account.Storage {
            v := obj.GetState(common.HexToHash(addr))
            vexp := common.HexToHash(value)

            if v != vexp {
                return fmt.Errorf("(%x: %s) storage failed. Expected %x, got %x (%v %v)\n", obj.Address().Bytes()[0:4], addr, vexp, v, vexp.Big(), v.Big())
            }
        }
    }

    statedb.Sync()
    if common.HexToHash(test.PostStateRoot) != statedb.Root() {
        return fmt.Errorf("Post state root error. Expected %s, got %x", test.PostStateRoot, statedb.Root())
    }

    // check logs
    if len(test.Logs) > 0 {
        if err := checkLogs(test.Logs, logs); err != nil {
            return err
        }
    }

    return nil
}

func RunState(statedb *state.StateDB, env, tx map[string]string) ([]byte, state.Logs, *big.Int, error) {
    var (
        data  = common.FromHex(tx["data"])
        gas   = common.Big(tx["gasLimit"])
        price = common.Big(tx["gasPrice"])
        value = common.Big(tx["value"])
        nonce = common.Big(tx["nonce"]).Uint64()
        caddr = common.HexToAddress(env["currentCoinbase"])
    )

    var to *common.Address
    if len(tx["to"]) > 2 {
        t := common.HexToAddress(tx["to"])
        to = &t
    }
    // Set pre compiled contracts
    vm.Precompiled = vm.PrecompiledContracts()

    snapshot := statedb.Copy()
    coinbase := statedb.GetOrNewStateObject(caddr)
    coinbase.SetGasLimit(common.Big(env["currentGasLimit"]))

    key, _ := hex.DecodeString(tx["secretKey"])
    addr := crypto.PubkeyToAddress(crypto.ToECDSA(key).PublicKey)
    message := NewMessage(addr, to, data, value, gas, price, nonce)
    vmenv := NewEnvFromMap(statedb, env, tx)
    vmenv.origin = addr
    ret, _, err := core.ApplyMessage(vmenv, message, coinbase)
    if core.IsNonceErr(err) || core.IsInvalidTxErr(err) || state.IsGasLimitErr(err) {
        statedb.Set(snapshot)
    }
    statedb.SyncObjects()

    return ret, vmenv.state.Logs(), vmenv.Gas, err
}