6ec6b29051
* core: fix import errors on clique crashes + empty blocks * cosensus/clique, core: add test for the mirrored state issue * core: address todo question wrt log count * core: raise a louder warning for non-clique known blocks
114 lines
4.4 KiB
Go
114 lines
4.4 KiB
Go
// Copyright 2019 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 clique
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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/core"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/params"
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)
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// This test case is a repro of an annoying bug that took us forever to catch.
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// In Clique PoA networks (Rinkeby, Görli, etc), consecutive blocks might have
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// the same state root (no block subsidy, empty block). If a node crashes, the
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// chain ends up losing the recent state and needs to regenerate it from blocks
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// already in the database. The bug was that processing the block *prior* to an
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// empty one **also completes** the empty one, ending up in a known-block error.
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func TestReimportMirroredState(t *testing.T) {
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// Initialize a Clique chain with a single signer
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var (
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db = rawdb.NewMemoryDatabase()
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key, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
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addr = crypto.PubkeyToAddress(key.PublicKey)
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engine = New(params.AllCliqueProtocolChanges.Clique, db)
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signer = new(types.HomesteadSigner)
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)
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genspec := &core.Genesis{
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ExtraData: make([]byte, extraVanity+common.AddressLength+extraSeal),
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Alloc: map[common.Address]core.GenesisAccount{
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addr: {Balance: big.NewInt(1)},
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},
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}
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copy(genspec.ExtraData[extraVanity:], addr[:])
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genesis := genspec.MustCommit(db)
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// Generate a batch of blocks, each properly signed
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chain, _ := core.NewBlockChain(db, nil, params.AllCliqueProtocolChanges, engine, vm.Config{}, nil)
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defer chain.Stop()
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blocks, _ := core.GenerateChain(params.AllCliqueProtocolChanges, genesis, engine, db, 3, func(i int, block *core.BlockGen) {
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// The chain maker doesn't have access to a chain, so the difficulty will be
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// lets unset (nil). Set it here to the correct value.
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block.SetDifficulty(diffInTurn)
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// We want to simulate an empty middle block, having the same state as the
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// first one. The last is needs a state change again to force a reorg.
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if i != 1 {
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tx, err := types.SignTx(types.NewTransaction(block.TxNonce(addr), common.Address{0x00}, new(big.Int), params.TxGas, nil, nil), signer, key)
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if err != nil {
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panic(err)
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}
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block.AddTxWithChain(chain, tx)
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}
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})
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for i, block := range blocks {
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header := block.Header()
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if i > 0 {
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header.ParentHash = blocks[i-1].Hash()
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}
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header.Extra = make([]byte, extraVanity+extraSeal)
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header.Difficulty = diffInTurn
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sig, _ := crypto.Sign(SealHash(header).Bytes(), key)
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copy(header.Extra[len(header.Extra)-extraSeal:], sig)
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blocks[i] = block.WithSeal(header)
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}
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// Insert the first two blocks and make sure the chain is valid
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db = rawdb.NewMemoryDatabase()
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genspec.MustCommit(db)
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chain, _ = core.NewBlockChain(db, nil, params.AllCliqueProtocolChanges, engine, vm.Config{}, nil)
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defer chain.Stop()
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if _, err := chain.InsertChain(blocks[:2]); err != nil {
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t.Fatalf("failed to insert initial blocks: %v", err)
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}
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if head := chain.CurrentBlock().NumberU64(); head != 2 {
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t.Fatalf("chain head mismatch: have %d, want %d", head, 2)
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}
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// Simulate a crash by creating a new chain on top of the database, without
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// flushing the dirty states out. Insert the last block, trigerring a sidechain
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// reimport.
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chain, _ = core.NewBlockChain(db, nil, params.AllCliqueProtocolChanges, engine, vm.Config{}, nil)
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defer chain.Stop()
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if _, err := chain.InsertChain(blocks[2:]); err != nil {
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t.Fatalf("failed to insert final block: %v", err)
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}
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if head := chain.CurrentBlock().NumberU64(); head != 3 {
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t.Fatalf("chain head mismatch: have %d, want %d", head, 3)
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}
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}
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