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// 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.Commit(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.Commit(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.Commit(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)
}
}
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