path: root/core/state/state_test.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 state

import (
    "bytes"
    "math/big"
    "testing"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/crypto"
    "github.com/ethereum/go-ethereum/ethdb"
    checker "gopkg.in/check.v1"
)

type StateSuite struct {
    db    *ethdb.MemDatabase
    state *StateDB
}

var _ = checker.Suite(&StateSuite{})

var toAddr = common.BytesToAddress

func (s *StateSuite) TestDump(c *checker.C) {
    // generate a few entries
    obj1 := s.state.GetOrNewStateObject(toAddr([]byte{0x01}))
    obj1.AddBalance(big.NewInt(22))
    obj2 := s.state.GetOrNewStateObject(toAddr([]byte{0x01, 0x02}))
    obj2.SetCode(crypto.Keccak256Hash([]byte{3, 3, 3, 3, 3, 3, 3}), []byte{3, 3, 3, 3, 3, 3, 3})
    obj3 := s.state.GetOrNewStateObject(toAddr([]byte{0x02}))
    obj3.SetBalance(big.NewInt(44))

    // write some of them to the trie
    s.state.updateStateObject(obj1)
    s.state.updateStateObject(obj2)
    s.state.CommitTo(s.db, false)

    // check that dump contains the state objects that are in trie
    got := string(s.state.Dump())
    want := `{
    "root": "71edff0130dd2385947095001c73d9e28d862fc286fca2b922ca6f6f3cddfdd2",
    "accounts": {
        "0000000000000000000000000000000000000001": {
            "balance": "22",
            "nonce": 0,
            "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
            "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
            "code": "",
            "storage": {}
        },
        "0000000000000000000000000000000000000002": {
            "balance": "44",
            "nonce": 0,
            "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
            "codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470",
            "code": "",
            "storage": {}
        },
        "0000000000000000000000000000000000000102": {
            "balance": "0",
            "nonce": 0,
            "root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
            "codeHash": "87874902497a5bb968da31a2998d8f22e949d1ef6214bcdedd8bae24cca4b9e3",
            "code": "03030303030303",
            "storage": {}
        }
    }
}`
    if got != want {
        c.Errorf("dump mismatch:\ngot: %s\nwant: %s\n", got, want)
    }
}

func (s *StateSuite) SetUpTest(c *checker.C) {
    s.db, _ = ethdb.NewMemDatabase()
    s.state, _ = New(common.Hash{}, NewDatabase(s.db))
}

func (s *StateSuite) TestNull(c *checker.C) {
    address := common.HexToAddress("0x823140710bf13990e4500136726d8b55")
    s.state.CreateAccount(address)
    //value := common.FromHex("0x823140710bf13990e4500136726d8b55")
    var value common.Hash
    s.state.SetState(address, common.Hash{}, value)
    s.state.CommitTo(s.db, false)
    value = s.state.GetState(address, common.Hash{})
    if !common.EmptyHash(value) {
        c.Errorf("expected empty hash. got %x", value)
    }
}

func (s *StateSuite) TestSnapshot(c *checker.C) {
    stateobjaddr := toAddr([]byte("aa"))
    var storageaddr common.Hash
    data1 := common.BytesToHash([]byte{42})
    data2 := common.BytesToHash([]byte{43})

    // set initial state object value
    s.state.SetState(stateobjaddr, storageaddr, data1)
    // get snapshot of current state
    snapshot := s.state.Snapshot()

    // set new state object value
    s.state.SetState(stateobjaddr, storageaddr, data2)
    // restore snapshot
    s.state.RevertToSnapshot(snapshot)

    // get state storage value
    res := s.state.GetState(stateobjaddr, storageaddr)

    c.Assert(data1, checker.DeepEquals, res)
}

func (s *StateSuite) TestSnapshotEmpty(c *checker.C) {
    s.state.RevertToSnapshot(s.state.Snapshot())
}

// use testing instead of checker because checker does not support
// printing/logging in tests (-check.vv does not work)
func TestSnapshot2(t *testing.T) {
    db, _ := ethdb.NewMemDatabase()
    state, _ := New(common.Hash{}, NewDatabase(db))

    stateobjaddr0 := toAddr([]byte("so0"))
    stateobjaddr1 := toAddr([]byte("so1"))
    var storageaddr common.Hash

    data0 := common.BytesToHash([]byte{17})
    data1 := common.BytesToHash([]byte{18})

    state.SetState(stateobjaddr0, storageaddr, data0)
    state.SetState(stateobjaddr1, storageaddr, data1)

    // db, trie are already non-empty values
    so0 := state.getStateObject(stateobjaddr0)
    so0.SetBalance(big.NewInt(42))
    so0.SetNonce(43)
    so0.SetCode(crypto.Keccak256Hash([]byte{'c', 'a', 'f', 'e'}), []byte{'c', 'a', 'f', 'e'})
    so0.suicided = false
    so0.deleted = false
    state.setStateObject(so0)

    root, _ := state.CommitTo(db, false)
    state.Reset(root)

    // and one with deleted == true
    so1 := state.getStateObject(stateobjaddr1)
    so1.SetBalance(big.NewInt(52))
    so1.SetNonce(53)
    so1.SetCode(crypto.Keccak256Hash([]byte{'c', 'a', 'f', 'e', '2'}), []byte{'c', 'a', 'f', 'e', '2'})
    so1.suicided = true
    so1.deleted = true
    state.setStateObject(so1)

    so1 = state.getStateObject(stateobjaddr1)
    if so1 != nil {
        t.Fatalf("deleted object not nil when getting")
    }

    snapshot := state.Snapshot()
    state.RevertToSnapshot(snapshot)

    so0Restored := state.getStateObject(stateobjaddr0)
    // Update lazily-loaded values before comparing.
    so0Restored.GetState(state.db, storageaddr)
    so0Restored.Code(state.db)
    // non-deleted is equal (restored)
    compareStateObjects(so0Restored, so0, t)

    // deleted should be nil, both before and after restore of state copy
    so1Restored := state.getStateObject(stateobjaddr1)
    if so1Restored != nil {
        t.Fatalf("deleted object not nil after restoring snapshot: %+v", so1Restored)
    }
}

func compareStateObjects(so0, so1 *stateObject, t *testing.T) {
    if so0.Address() != so1.Address() {
        t.Fatalf("Address mismatch: have %v, want %v", so0.address, so1.address)
    }
    if so0.Balance().Cmp(so1.Balance()) != 0 {
        t.Fatalf("Balance mismatch: have %v, want %v", so0.Balance(), so1.Balance())
    }
    if so0.Nonce() != so1.Nonce() {
        t.Fatalf("Nonce mismatch: have %v, want %v", so0.Nonce(), so1.Nonce())
    }
    if so0.data.Root != so1.data.Root {
        t.Errorf("Root mismatch: have %x, want %x", so0.data.Root[:], so1.data.Root[:])
    }
    if !bytes.Equal(so0.CodeHash(), so1.CodeHash()) {
        t.Fatalf("CodeHash mismatch: have %v, want %v", so0.CodeHash(), so1.CodeHash())
    }
    if !bytes.Equal(so0.code, so1.code) {
        t.Fatalf("Code mismatch: have %v, want %v", so0.code, so1.code)
    }

    if len(so1.cachedStorage) != len(so0.cachedStorage) {
        t.Errorf("Storage size mismatch: have %d, want %d", len(so1.cachedStorage), len(so0.cachedStorage))
    }
    for k, v := range so1.cachedStorage {
        if so0.cachedStorage[k] != v {
            t.Errorf("Storage key %x mismatch: have %v, want %v", k, so0.cachedStorage[k], v)
        }
    }
    for k, v := range so0.cachedStorage {
        if so1.cachedStorage[k] != v {
            t.Errorf("Storage key %x mismatch: have %v, want none.", k, v)
        }
    }

    if so0.suicided != so1.suicided {
        t.Fatalf("suicided mismatch: have %v, want %v", so0.suicided, so1.suicided)
    }
    if so0.deleted != so1.deleted {
        t.Fatalf("Deleted mismatch: have %v, want %v", so0.deleted, so1.deleted)
    }
}