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261 lines
8.1 KiB
261 lines
8.1 KiB
// Copyright 2020 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 miner implements Ethereum block creation and mining.
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package miner
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import (
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/consensus/clique"
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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/state"
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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/eth/downloader"
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"github.com/ethereum/go-ethereum/ethdb/memorydb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/trie"
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)
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type mockBackend struct {
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bc *core.BlockChain
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txPool *core.TxPool
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}
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func NewMockBackend(bc *core.BlockChain, txPool *core.TxPool) *mockBackend {
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return &mockBackend{
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bc: bc,
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txPool: txPool,
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}
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}
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func (m *mockBackend) BlockChain() *core.BlockChain {
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return m.bc
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}
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func (m *mockBackend) TxPool() *core.TxPool {
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return m.txPool
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}
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type testBlockChain struct {
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statedb *state.StateDB
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gasLimit uint64
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chainHeadFeed *event.Feed
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}
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func (bc *testBlockChain) CurrentBlock() *types.Block {
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return types.NewBlock(&types.Header{
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GasLimit: bc.gasLimit,
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}, nil, nil, nil, trie.NewStackTrie(nil))
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}
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func (bc *testBlockChain) GetBlock(hash common.Hash, number uint64) *types.Block {
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return bc.CurrentBlock()
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}
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func (bc *testBlockChain) StateAt(common.Hash) (*state.StateDB, error) {
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return bc.statedb, nil
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}
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func (bc *testBlockChain) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
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return bc.chainHeadFeed.Subscribe(ch)
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}
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func TestMiner(t *testing.T) {
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miner, mux := createMiner(t)
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miner.Start(common.HexToAddress("0x12345"))
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waitForMiningState(t, miner, true)
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// Start the downloader
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, false)
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// Stop the downloader and wait for the update loop to run
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mux.Post(downloader.DoneEvent{})
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waitForMiningState(t, miner, true)
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// Subsequent downloader events after a successful DoneEvent should not cause the
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// miner to start or stop. This prevents a security vulnerability
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// that would allow entities to present fake high blocks that would
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// stop mining operations by causing a downloader sync
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// until it was discovered they were invalid, whereon mining would resume.
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, true)
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mux.Post(downloader.FailedEvent{})
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waitForMiningState(t, miner, true)
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}
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// TestMinerDownloaderFirstFails tests that mining is only
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// permitted to run indefinitely once the downloader sees a DoneEvent (success).
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// An initial FailedEvent should allow mining to stop on a subsequent
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// downloader StartEvent.
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func TestMinerDownloaderFirstFails(t *testing.T) {
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miner, mux := createMiner(t)
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miner.Start(common.HexToAddress("0x12345"))
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waitForMiningState(t, miner, true)
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// Start the downloader
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, false)
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// Stop the downloader and wait for the update loop to run
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mux.Post(downloader.FailedEvent{})
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waitForMiningState(t, miner, true)
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// Since the downloader hasn't yet emitted a successful DoneEvent,
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// we expect the miner to stop on next StartEvent.
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, false)
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// Downloader finally succeeds.
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mux.Post(downloader.DoneEvent{})
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waitForMiningState(t, miner, true)
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// Downloader starts again.
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// Since it has achieved a DoneEvent once, we expect miner
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// state to be unchanged.
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, true)
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mux.Post(downloader.FailedEvent{})
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waitForMiningState(t, miner, true)
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}
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func TestMinerStartStopAfterDownloaderEvents(t *testing.T) {
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miner, mux := createMiner(t)
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miner.Start(common.HexToAddress("0x12345"))
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waitForMiningState(t, miner, true)
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// Start the downloader
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, false)
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// Downloader finally succeeds.
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mux.Post(downloader.DoneEvent{})
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waitForMiningState(t, miner, true)
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miner.Stop()
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waitForMiningState(t, miner, false)
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miner.Start(common.HexToAddress("0x678910"))
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waitForMiningState(t, miner, true)
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miner.Stop()
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waitForMiningState(t, miner, false)
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}
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func TestStartWhileDownload(t *testing.T) {
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miner, mux := createMiner(t)
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waitForMiningState(t, miner, false)
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miner.Start(common.HexToAddress("0x12345"))
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waitForMiningState(t, miner, true)
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// Stop the downloader and wait for the update loop to run
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, false)
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// Starting the miner after the downloader should not work
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miner.Start(common.HexToAddress("0x12345"))
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waitForMiningState(t, miner, false)
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}
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func TestStartStopMiner(t *testing.T) {
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miner, _ := createMiner(t)
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waitForMiningState(t, miner, false)
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miner.Start(common.HexToAddress("0x12345"))
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waitForMiningState(t, miner, true)
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miner.Stop()
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waitForMiningState(t, miner, false)
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}
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func TestCloseMiner(t *testing.T) {
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miner, _ := createMiner(t)
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waitForMiningState(t, miner, false)
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miner.Start(common.HexToAddress("0x12345"))
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waitForMiningState(t, miner, true)
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// Terminate the miner and wait for the update loop to run
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miner.Close()
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waitForMiningState(t, miner, false)
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}
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// TestMinerSetEtherbase checks that etherbase becomes set even if mining isn't
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// possible at the moment
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func TestMinerSetEtherbase(t *testing.T) {
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miner, mux := createMiner(t)
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// Start with a 'bad' mining address
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miner.Start(common.HexToAddress("0xdead"))
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waitForMiningState(t, miner, true)
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// Start the downloader
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mux.Post(downloader.StartEvent{})
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waitForMiningState(t, miner, false)
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// Now user tries to configure proper mining address
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miner.Start(common.HexToAddress("0x1337"))
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// Stop the downloader and wait for the update loop to run
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mux.Post(downloader.DoneEvent{})
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waitForMiningState(t, miner, true)
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// The miner should now be using the good address
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if got, exp := miner.coinbase, common.HexToAddress("0x1337"); got != exp {
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t.Fatalf("Wrong coinbase, got %x expected %x", got, exp)
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}
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}
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// waitForMiningState waits until either
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// * the desired mining state was reached
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// * a timeout was reached which fails the test
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func waitForMiningState(t *testing.T, m *Miner, mining bool) {
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t.Helper()
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var state bool
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for i := 0; i < 100; i++ {
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time.Sleep(10 * time.Millisecond)
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if state = m.Mining(); state == mining {
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return
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}
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}
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t.Fatalf("Mining() == %t, want %t", state, mining)
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}
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func createMiner(t *testing.T) (*Miner, *event.TypeMux) {
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// Create Ethash config
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config := Config{
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Etherbase: common.HexToAddress("123456789"),
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}
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// Create chainConfig
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memdb := memorydb.New()
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chainDB := rawdb.NewDatabase(memdb)
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genesis := core.DeveloperGenesisBlock(15, common.HexToAddress("12345"))
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chainConfig, _, err := core.SetupGenesisBlock(chainDB, genesis)
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if err != nil {
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t.Fatalf("can't create new chain config: %v", err)
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}
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// Create consensus engine
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engine := clique.New(chainConfig.Clique, chainDB)
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// Create Ethereum backend
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bc, err := core.NewBlockChain(chainDB, nil, chainConfig, engine, vm.Config{}, nil, nil)
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if err != nil {
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t.Fatalf("can't create new chain %v", err)
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}
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statedb, _ := state.New(common.Hash{}, state.NewDatabase(chainDB), nil)
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blockchain := &testBlockChain{statedb, 10000000, new(event.Feed)}
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pool := core.NewTxPool(testTxPoolConfig, chainConfig, blockchain)
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backend := NewMockBackend(bc, pool)
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// Create event Mux
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mux := new(event.TypeMux)
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// Create Miner
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return New(backend, &config, chainConfig, mux, engine, nil), mux
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}
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