121 lines
4.2 KiB
Go
121 lines
4.2 KiB
Go
// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package state
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import (
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"math/big"
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"testing"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/ethdb"
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)
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// Tests that updating a state trie does not leak any database writes prior to
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// actually committing the state.
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func TestUpdateLeaks(t *testing.T) {
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// Create an empty state database
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db, _ := ethdb.NewMemDatabase()
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state, _ := New(common.Hash{}, db)
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// Update it with some accounts
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for i := byte(0); i < 255; i++ {
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obj := state.GetOrNewStateObject(common.BytesToAddress([]byte{i}))
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obj.AddBalance(big.NewInt(int64(11 * i)))
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obj.SetNonce(uint64(42 * i))
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if i%2 == 0 {
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obj.SetState(common.BytesToHash([]byte{i, i, i}), common.BytesToHash([]byte{i, i, i, i}))
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}
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if i%3 == 0 {
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obj.SetCode([]byte{i, i, i, i, i})
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}
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state.UpdateStateObject(obj)
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}
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// Ensure that no data was leaked into the database
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for _, key := range db.Keys() {
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value, _ := db.Get(key)
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t.Errorf("State leaked into database: %x -> %x", key, value)
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}
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}
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// Tests that no intermediate state of an object is stored into the database,
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// only the one right before the commit.
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func TestIntermediateLeaks(t *testing.T) {
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// Create two state databases, one transitioning to the final state, the other final from the beginning
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transDb, _ := ethdb.NewMemDatabase()
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finalDb, _ := ethdb.NewMemDatabase()
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transState, _ := New(common.Hash{}, transDb)
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finalState, _ := New(common.Hash{}, finalDb)
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// Update the states with some objects
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for i := byte(0); i < 255; i++ {
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// Create a new state object with some data into the transition database
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obj := transState.GetOrNewStateObject(common.BytesToAddress([]byte{i}))
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obj.SetBalance(big.NewInt(int64(11 * i)))
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obj.SetNonce(uint64(42 * i))
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if i%2 == 0 {
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obj.SetState(common.BytesToHash([]byte{i, i, i, 0}), common.BytesToHash([]byte{i, i, i, i, 0}))
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}
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if i%3 == 0 {
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obj.SetCode([]byte{i, i, i, i, i, 0})
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}
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transState.UpdateStateObject(obj)
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// Overwrite all the data with new values in the transition database
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obj.SetBalance(big.NewInt(int64(11*i + 1)))
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obj.SetNonce(uint64(42*i + 1))
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if i%2 == 0 {
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obj.SetState(common.BytesToHash([]byte{i, i, i, 0}), common.Hash{})
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obj.SetState(common.BytesToHash([]byte{i, i, i, 1}), common.BytesToHash([]byte{i, i, i, i, 1}))
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}
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if i%3 == 0 {
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obj.SetCode([]byte{i, i, i, i, i, 1})
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}
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transState.UpdateStateObject(obj)
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// Create the final state object directly in the final database
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obj = finalState.GetOrNewStateObject(common.BytesToAddress([]byte{i}))
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obj.SetBalance(big.NewInt(int64(11*i + 1)))
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obj.SetNonce(uint64(42*i + 1))
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if i%2 == 0 {
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obj.SetState(common.BytesToHash([]byte{i, i, i, 1}), common.BytesToHash([]byte{i, i, i, i, 1}))
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}
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if i%3 == 0 {
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obj.SetCode([]byte{i, i, i, i, i, 1})
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}
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finalState.UpdateStateObject(obj)
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}
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if _, err := transState.Commit(); err != nil {
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t.Fatalf("failed to commit transition state: %v", err)
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}
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if _, err := finalState.Commit(); err != nil {
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t.Fatalf("failed to commit final state: %v", err)
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}
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// Cross check the databases to ensure they are the same
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for _, key := range finalDb.Keys() {
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if _, err := transDb.Get(key); err != nil {
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val, _ := finalDb.Get(key)
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t.Errorf("entry missing from the transition database: %x -> %x", key, val)
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}
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}
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for _, key := range transDb.Keys() {
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if _, err := finalDb.Get(key); err != nil {
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val, _ := transDb.Get(key)
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t.Errorf("extra entry in the transition database: %x -> %x", key, val)
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}
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}
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}
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