231 lines
7.7 KiB
Go
231 lines
7.7 KiB
Go
// Copyright 2018 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 downloader
|
|
|
|
import (
|
|
"fmt"
|
|
"math/big"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
"github.com/ethereum/go-ethereum/consensus/ethash"
|
|
"github.com/ethereum/go-ethereum/core"
|
|
"github.com/ethereum/go-ethereum/core/rawdb"
|
|
"github.com/ethereum/go-ethereum/core/types"
|
|
"github.com/ethereum/go-ethereum/core/vm"
|
|
"github.com/ethereum/go-ethereum/crypto"
|
|
"github.com/ethereum/go-ethereum/params"
|
|
)
|
|
|
|
// Test chain parameters.
|
|
var (
|
|
testKey, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291")
|
|
testAddress = crypto.PubkeyToAddress(testKey.PublicKey)
|
|
testDB = rawdb.NewMemoryDatabase()
|
|
|
|
testGspec = &core.Genesis{
|
|
Config: params.TestChainConfig,
|
|
Alloc: core.GenesisAlloc{testAddress: {Balance: big.NewInt(1000000000000000)}},
|
|
BaseFee: big.NewInt(params.InitialBaseFee),
|
|
}
|
|
testGenesis = testGspec.MustCommit(testDB)
|
|
)
|
|
|
|
// The common prefix of all test chains:
|
|
var testChainBase *testChain
|
|
|
|
// Different forks on top of the base chain:
|
|
var testChainForkLightA, testChainForkLightB, testChainForkHeavy *testChain
|
|
|
|
var pregenerated bool
|
|
|
|
func init() {
|
|
// Reduce some of the parameters to make the tester faster
|
|
fullMaxForkAncestry = 10000
|
|
lightMaxForkAncestry = 10000
|
|
blockCacheMaxItems = 1024
|
|
fsHeaderSafetyNet = 256
|
|
fsHeaderContCheck = 500 * time.Millisecond
|
|
|
|
testChainBase = newTestChain(blockCacheMaxItems+200, testGenesis)
|
|
|
|
var forkLen = int(fullMaxForkAncestry + 50)
|
|
var wg sync.WaitGroup
|
|
|
|
// Generate the test chains to seed the peers with
|
|
wg.Add(3)
|
|
go func() { testChainForkLightA = testChainBase.makeFork(forkLen, false, 1); wg.Done() }()
|
|
go func() { testChainForkLightB = testChainBase.makeFork(forkLen, false, 2); wg.Done() }()
|
|
go func() { testChainForkHeavy = testChainBase.makeFork(forkLen, true, 3); wg.Done() }()
|
|
wg.Wait()
|
|
|
|
// Generate the test peers used by the tests to avoid overloading during testing.
|
|
// These seemingly random chains are used in various downloader tests. We're just
|
|
// pre-generating them here.
|
|
chains := []*testChain{
|
|
testChainBase,
|
|
testChainForkLightA,
|
|
testChainForkLightB,
|
|
testChainForkHeavy,
|
|
testChainBase.shorten(1),
|
|
testChainBase.shorten(blockCacheMaxItems - 15),
|
|
testChainBase.shorten((blockCacheMaxItems - 15) / 2),
|
|
testChainBase.shorten(blockCacheMaxItems - 15 - 5),
|
|
testChainBase.shorten(MaxHeaderFetch),
|
|
testChainBase.shorten(800),
|
|
testChainBase.shorten(800 / 2),
|
|
testChainBase.shorten(800 / 3),
|
|
testChainBase.shorten(800 / 4),
|
|
testChainBase.shorten(800 / 5),
|
|
testChainBase.shorten(800 / 6),
|
|
testChainBase.shorten(800 / 7),
|
|
testChainBase.shorten(800 / 8),
|
|
testChainBase.shorten(3*fsHeaderSafetyNet + 256 + fsMinFullBlocks),
|
|
testChainBase.shorten(fsMinFullBlocks + 256 - 1),
|
|
testChainForkLightA.shorten(len(testChainBase.blocks) + 80),
|
|
testChainForkLightB.shorten(len(testChainBase.blocks) + 81),
|
|
testChainForkLightA.shorten(len(testChainBase.blocks) + MaxHeaderFetch),
|
|
testChainForkLightB.shorten(len(testChainBase.blocks) + MaxHeaderFetch),
|
|
testChainForkHeavy.shorten(len(testChainBase.blocks) + 79),
|
|
}
|
|
wg.Add(len(chains))
|
|
for _, chain := range chains {
|
|
go func(blocks []*types.Block) {
|
|
newTestBlockchain(blocks)
|
|
wg.Done()
|
|
}(chain.blocks[1:])
|
|
}
|
|
wg.Wait()
|
|
|
|
// Mark the chains pregenerated. Generating a new one will lead to a panic.
|
|
pregenerated = true
|
|
}
|
|
|
|
type testChain struct {
|
|
blocks []*types.Block
|
|
}
|
|
|
|
// newTestChain creates a blockchain of the given length.
|
|
func newTestChain(length int, genesis *types.Block) *testChain {
|
|
tc := &testChain{
|
|
blocks: []*types.Block{genesis},
|
|
}
|
|
tc.generate(length-1, 0, genesis, false)
|
|
return tc
|
|
}
|
|
|
|
// makeFork creates a fork on top of the test chain.
|
|
func (tc *testChain) makeFork(length int, heavy bool, seed byte) *testChain {
|
|
fork := tc.copy(len(tc.blocks) + length)
|
|
fork.generate(length, seed, tc.blocks[len(tc.blocks)-1], heavy)
|
|
return fork
|
|
}
|
|
|
|
// shorten creates a copy of the chain with the given length. It panics if the
|
|
// length is longer than the number of available blocks.
|
|
func (tc *testChain) shorten(length int) *testChain {
|
|
if length > len(tc.blocks) {
|
|
panic(fmt.Errorf("can't shorten test chain to %d blocks, it's only %d blocks long", length, len(tc.blocks)))
|
|
}
|
|
return tc.copy(length)
|
|
}
|
|
|
|
func (tc *testChain) copy(newlen int) *testChain {
|
|
if newlen > len(tc.blocks) {
|
|
newlen = len(tc.blocks)
|
|
}
|
|
cpy := &testChain{
|
|
blocks: append([]*types.Block{}, tc.blocks[:newlen]...),
|
|
}
|
|
return cpy
|
|
}
|
|
|
|
// generate creates a chain of n blocks starting at and including parent.
|
|
// the returned hash chain is ordered head->parent. In addition, every 22th block
|
|
// contains a transaction and every 5th an uncle to allow testing correct block
|
|
// reassembly.
|
|
func (tc *testChain) generate(n int, seed byte, parent *types.Block, heavy bool) {
|
|
blocks, _ := core.GenerateChain(testGspec.Config, parent, ethash.NewFaker(), testDB, n, func(i int, block *core.BlockGen) {
|
|
block.SetCoinbase(common.Address{seed})
|
|
// If a heavy chain is requested, delay blocks to raise difficulty
|
|
if heavy {
|
|
block.OffsetTime(-9)
|
|
}
|
|
// Include transactions to the miner to make blocks more interesting.
|
|
if parent == tc.blocks[0] && i%22 == 0 {
|
|
signer := types.MakeSigner(params.TestChainConfig, block.Number(), block.Timestamp())
|
|
tx, err := types.SignTx(types.NewTransaction(block.TxNonce(testAddress), common.Address{seed}, big.NewInt(1000), params.TxGas, block.BaseFee(), nil), signer, testKey)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
block.AddTx(tx)
|
|
}
|
|
// if the block number is a multiple of 5, add a bonus uncle to the block
|
|
if i > 0 && i%5 == 0 {
|
|
block.AddUncle(&types.Header{
|
|
ParentHash: block.PrevBlock(i - 2).Hash(),
|
|
Number: big.NewInt(block.Number().Int64() - 1),
|
|
})
|
|
}
|
|
})
|
|
tc.blocks = append(tc.blocks, blocks...)
|
|
}
|
|
|
|
var (
|
|
testBlockchains = make(map[common.Hash]*testBlockchain)
|
|
testBlockchainsLock sync.Mutex
|
|
)
|
|
|
|
type testBlockchain struct {
|
|
chain *core.BlockChain
|
|
gen sync.Once
|
|
}
|
|
|
|
// newTestBlockchain creates a blockchain database built by running the given blocks,
|
|
// either actually running them, or reusing a previously created one. The returned
|
|
// chains are *shared*, so *do not* mutate them.
|
|
func newTestBlockchain(blocks []*types.Block) *core.BlockChain {
|
|
// Retrieve an existing database, or create a new one
|
|
head := testGenesis.Hash()
|
|
if len(blocks) > 0 {
|
|
head = blocks[len(blocks)-1].Hash()
|
|
}
|
|
testBlockchainsLock.Lock()
|
|
if _, ok := testBlockchains[head]; !ok {
|
|
testBlockchains[head] = new(testBlockchain)
|
|
}
|
|
tbc := testBlockchains[head]
|
|
testBlockchainsLock.Unlock()
|
|
|
|
// Ensure that the database is generated
|
|
tbc.gen.Do(func() {
|
|
if pregenerated {
|
|
panic("Requested chain generation outside of init")
|
|
}
|
|
chain, err := core.NewBlockChain(rawdb.NewMemoryDatabase(), nil, testGspec, nil, ethash.NewFaker(), vm.Config{}, nil, nil)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
if n, err := chain.InsertChain(blocks); err != nil {
|
|
panic(fmt.Sprintf("block %d: %v", n, err))
|
|
}
|
|
tbc.chain = chain
|
|
})
|
|
return tbc.chain
|
|
}
|