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consensus/clique, core: API cleanup (#23100) 

This removes some code:

- The clique engine calculated the snapshot twice when verifying headers/blocks.

- The method GetBlockHashesFromHash in Header/Block/Lightchain was only used by tests. It
  is now removed from the API.
  
- The method GetTdByHash internally looked up the number before calling GetTd(hash, num).
  In many cases, callers already had the number, and used this method just because it has a
  shorter name. I have removed the method to make the API surface smaller.
This commit is contained in:
Martin Holst Swende 2021-10-11 23:16:46 +02:00 committed by GitHub
parent da3da7c0e7
commit 6289137827
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 38 additions and 84 deletions
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10
consensus/clique/clique.go
View File

@ -363,7 +363,7 @@ func (c *Clique) verifyCascadingFields(chain consensus.ChainHeaderReader, header
}
}
// All basic checks passed, verify the seal and return
return c.verifySeal(chain, header, parents)
return c.verifySeal(snap, header, parents)
}
// snapshot retrieves the authorization snapshot at a given point in time.
@ -460,18 +460,12 @@ func (c *Clique) VerifyUncles(chain consensus.ChainReader, block *types.Block) e
// consensus protocol requirements. The method accepts an optional list of parent
// headers that aren't yet part of the local blockchain to generate the snapshots
// from.
func (c *Clique) verifySeal(chain consensus.ChainHeaderReader, header *types.Header, parents []*types.Header) error {
func (c *Clique) verifySeal(snap *Snapshot, header *types.Header, parents []*types.Header) error {
// Verifying the genesis block is not supported
number := header.Number.Uint64()
if number == 0 {
return errUnknownBlock
}
// Retrieve the snapshot needed to verify this header and cache it
snap, err := c.snapshot(chain, number-1, header.ParentHash, parents)
if err != nil {
return err
}
// Resolve the authorization key and check against signers
signer, err := ecrecover(header, c.signatures)
if err != nil {

12
core/blockchain.go
View File

@ -2411,12 +2411,6 @@ func (bc *BlockChain) GetTd(hash common.Hash, number uint64) *big.Int {
return bc.hc.GetTd(hash, number)
}
// GetTdByHash retrieves a block's total difficulty in the canonical chain from the
// database by hash, caching it if found.
func (bc *BlockChain) GetTdByHash(hash common.Hash) *big.Int {
return bc.hc.GetTdByHash(hash)
}
// GetHeader retrieves a block header from the database by hash and number,
// caching it if found.
func (bc *BlockChain) GetHeader(hash common.Hash, number uint64) *types.Header {
@ -2450,12 +2444,6 @@ func (bc *BlockChain) GetCanonicalHash(number uint64) common.Hash {
return bc.hc.GetCanonicalHash(number)
}
// GetBlockHashesFromHash retrieves a number of block hashes starting at a given
// hash, fetching towards the genesis block.
func (bc *BlockChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
return bc.hc.GetBlockHashesFromHash(hash, max)
}
// GetAncestor retrieves the Nth ancestor of a given block. It assumes that either the given block or
// a close ancestor of it is canonical. maxNonCanonical points to a downwards counter limiting the
// number of blocks to be individually checked before we reach the canonical chain.

26
core/blockchain_test.go
View File

@ -118,17 +118,21 @@ func testFork(t *testing.T, blockchain *BlockChain, i, n int, full bool, compara
var tdPre, tdPost *big.Int
if full {
tdPre = blockchain.GetTdByHash(blockchain.CurrentBlock().Hash())
cur := blockchain.CurrentBlock()
tdPre = blockchain.GetTd(cur.Hash(), cur.NumberU64())
if err := testBlockChainImport(blockChainB, blockchain); err != nil {
t.Fatalf("failed to import forked block chain: %v", err)
}
tdPost = blockchain.GetTdByHash(blockChainB[len(blockChainB)-1].Hash())
last := blockChainB[len(blockChainB)-1]
tdPost = blockchain.GetTd(last.Hash(), last.NumberU64())
} else {
tdPre = blockchain.GetTdByHash(blockchain.CurrentHeader().Hash())
cur := blockchain.CurrentHeader()
tdPre = blockchain.GetTd(cur.Hash(), cur.Number.Uint64())
if err := testHeaderChainImport(headerChainB, blockchain); err != nil {
t.Fatalf("failed to import forked header chain: %v", err)
}
tdPost = blockchain.GetTdByHash(headerChainB[len(headerChainB)-1].Hash())
last := headerChainB[len(headerChainB)-1]
tdPost = blockchain.GetTd(last.Hash(), last.Number.Uint64())
}
// Compare the total difficulties of the chains
comparator(tdPre, tdPost)
@ -165,7 +169,7 @@ func testBlockChainImport(chain types.Blocks, blockchain *BlockChain) error {
}
blockchain.chainmu.MustLock()
rawdb.WriteTd(blockchain.db, block.Hash(), block.NumberU64(), new(big.Int).Add(block.Difficulty(), blockchain.GetTdByHash(block.ParentHash())))
rawdb.WriteTd(blockchain.db, block.Hash(), block.NumberU64(), new(big.Int).Add(block.Difficulty(), blockchain.GetTd(block.ParentHash(), block.NumberU64()-1)))
rawdb.WriteBlock(blockchain.db, block)
statedb.Commit(false)
blockchain.chainmu.Unlock()
@ -183,7 +187,7 @@ func testHeaderChainImport(chain []*types.Header, blockchain *BlockChain) error
}
// Manually insert the header into the database, but don't reorganise (allows subsequent testing)
blockchain.chainmu.MustLock()
rawdb.WriteTd(blockchain.db, header.Hash(), header.Number.Uint64(), new(big.Int).Add(header.Difficulty, blockchain.GetTdByHash(header.ParentHash)))
rawdb.WriteTd(blockchain.db, header.Hash(), header.Number.Uint64(), new(big.Int).Add(header.Difficulty, blockchain.GetTd(header.ParentHash, header.Number.Uint64()-1)))
rawdb.WriteHeader(blockchain.db, header)
blockchain.chainmu.Unlock()
}
@ -436,11 +440,13 @@ func testReorg(t *testing.T, first, second []int64, td int64, full bool) {
// Make sure the chain total difficulty is the correct one
want := new(big.Int).Add(blockchain.genesisBlock.Difficulty(), big.NewInt(td))
if full {
if have := blockchain.GetTdByHash(blockchain.CurrentBlock().Hash()); have.Cmp(want) != 0 {
cur := blockchain.CurrentBlock()
if have := blockchain.GetTd(cur.Hash(), cur.NumberU64()); have.Cmp(want) != 0 {
t.Errorf("total difficulty mismatch: have %v, want %v", have, want)
}
} else {
if have := blockchain.GetTdByHash(blockchain.CurrentHeader().Hash()); have.Cmp(want) != 0 {
cur := blockchain.CurrentHeader()
if have := blockchain.GetTd(cur.Hash(), cur.Number.Uint64()); have.Cmp(want) != 0 {
t.Errorf("total difficulty mismatch: have %v, want %v", have, want)
}
}
@ -676,10 +682,10 @@ func TestFastVsFullChains(t *testing.T) {
for i := 0; i < len(blocks); i++ {
num, hash := blocks[i].NumberU64(), blocks[i].Hash()
if ftd, atd := fast.GetTdByHash(hash), archive.GetTdByHash(hash); ftd.Cmp(atd) != 0 {
if ftd, atd := fast.GetTd(hash, num), archive.GetTd(hash, num); ftd.Cmp(atd) != 0 {
t.Errorf("block #%d [%x]: td mismatch: fastdb %v, archivedb %v", num, hash, ftd, atd)
}
if antd, artd := ancient.GetTdByHash(hash), archive.GetTdByHash(hash); antd.Cmp(artd) != 0 {
if antd, artd := ancient.GetTd(hash, num), archive.GetTd(hash, num); antd.Cmp(artd) != 0 {
t.Errorf("block #%d [%x]: td mismatch: ancientdb %v, archivedb %v", num, hash, antd, artd)
}
if fheader, aheader := fast.GetHeaderByHash(hash), archive.GetHeaderByHash(hash); fheader.Hash() != aheader.Hash() {

33
core/headerchain.go
View File

@ -394,29 +394,6 @@ func (hc *HeaderChain) InsertHeaderChain(chain []*types.Header, start time.Time)
return res.status, err
}
// GetBlockHashesFromHash retrieves a number of block hashes starting at a given
// hash, fetching towards the genesis block.
func (hc *HeaderChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
// Get the origin header from which to fetch
header := hc.GetHeaderByHash(hash)
if header == nil {
return nil
}
// Iterate the headers until enough is collected or the genesis reached
chain := make([]common.Hash, 0, max)
for i := uint64(0); i < max; i++ {
next := header.ParentHash
if header = hc.GetHeader(next, header.Number.Uint64()-1); header == nil {
break
}
chain = append(chain, next)
if header.Number.Sign() == 0 {
break
}
}
return chain
}
// GetAncestor retrieves the Nth ancestor of a given block. It assumes that either the given block or
// a close ancestor of it is canonical. maxNonCanonical points to a downwards counter limiting the
// number of blocks to be individually checked before we reach the canonical chain.
@ -472,16 +449,6 @@ func (hc *HeaderChain) GetTd(hash common.Hash, number uint64) *big.Int {
return td
}
// GetTdByHash retrieves a block's total difficulty in the canonical chain from the
// database by hash, caching it if found.
func (hc *HeaderChain) GetTdByHash(hash common.Hash) *big.Int {
number := hc.GetBlockNumber(hash)
if number == nil {
return nil
}
return hc.GetTd(hash, *number)
}
// GetHeader retrieves a block header from the database by hash and number,
// caching it if found.
func (hc *HeaderChain) GetHeader(hash common.Hash, number uint64) *types.Header {

5
eth/api_backend.go
View File

@ -194,7 +194,10 @@ func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*typ
}
func (b *EthAPIBackend) GetTd(ctx context.Context, hash common.Hash) *big.Int {
return b.eth.blockchain.GetTdByHash(hash)
if header := b.eth.blockchain.GetHeaderByHash(hash); header != nil {
return b.eth.blockchain.GetTd(hash, header.Number.Uint64())
}
return nil
}
func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header, vmConfig *vm.Config) (*vm.EVM, func() error, error) {

8
eth/protocols/eth/handler_test.go
View File

@ -126,6 +126,12 @@ func testGetBlockHeaders(t *testing.T, protocol uint) {
for i := range unknown {
unknown[i] = byte(i)
}
getHashes := func(from, limit uint64) (hashes []common.Hash) {
for i := uint64(0); i < limit; i++ {
hashes = append(hashes, backend.chain.GetCanonicalHash(from-1-i))
}
return hashes
}
// Create a batch of tests for various scenarios
limit := uint64(maxHeadersServe)
tests := []struct {
@ -183,7 +189,7 @@ func testGetBlockHeaders(t *testing.T, protocol uint) {
// Ensure protocol limits are honored
{
&GetBlockHeadersPacket{Origin: HashOrNumber{Number: backend.chain.CurrentBlock().NumberU64() - 1}, Amount: limit + 10, Reverse: true},
backend.chain.GetBlockHashesFromHash(backend.chain.CurrentBlock().Hash(), limit),
getHashes(backend.chain.CurrentBlock().NumberU64(), limit),
},
// Check that requesting more than available is handled gracefully
{

4
eth/sync.go
View File

@ -182,7 +182,7 @@ func (cs *chainSyncer) modeAndLocalHead() (downloader.SyncMode, *big.Int) {
// If we're in fast sync mode, return that directly
if atomic.LoadUint32(&cs.handler.fastSync) == 1 {
block := cs.handler.chain.CurrentFastBlock()
td := cs.handler.chain.GetTdByHash(block.Hash())
td := cs.handler.chain.GetTd(block.Hash(), block.NumberU64())
return downloader.FastSync, td
}
// We are probably in full sync, but we might have rewound to before the
@ -190,7 +190,7 @@ func (cs *chainSyncer) modeAndLocalHead() (downloader.SyncMode, *big.Int) {
if pivot := rawdb.ReadLastPivotNumber(cs.handler.database); pivot != nil {
if head := cs.handler.chain.CurrentBlock(); head.NumberU64() < *pivot {
block := cs.handler.chain.CurrentFastBlock()
td := cs.handler.chain.GetTdByHash(block.Hash())
td := cs.handler.chain.GetTd(block.Hash(), block.NumberU64())
return downloader.FastSync, td
}
}

12
light/lightchain.go
View File

@ -430,12 +430,6 @@ func (lc *LightChain) GetTd(hash common.Hash, number uint64) *big.Int {
return lc.hc.GetTd(hash, number)
}
// GetTdByHash retrieves a block's total difficulty in the canonical chain from the
// database by hash, caching it if found.
func (lc *LightChain) GetTdByHash(hash common.Hash) *big.Int {
return lc.hc.GetTdByHash(hash)
}
// GetHeaderByNumberOdr retrieves the total difficult from the database or
// network by hash and number, caching it (associated with its hash) if found.
func (lc *LightChain) GetTdOdr(ctx context.Context, hash common.Hash, number uint64) *big.Int {
@ -470,12 +464,6 @@ func (bc *LightChain) GetCanonicalHash(number uint64) common.Hash {
return bc.hc.GetCanonicalHash(number)
}
// GetBlockHashesFromHash retrieves a number of block hashes starting at a given
// hash, fetching towards the genesis block.
func (lc *LightChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
return lc.hc.GetBlockHashesFromHash(hash, max)
}
// GetAncestor retrieves the Nth ancestor of a given block. It assumes that either the given block or
// a close ancestor of it is canonical. maxNonCanonical points to a downwards counter limiting the
// number of blocks to be individually checked before we reach the canonical chain.

12
light/lightchain_test.go
View File

@ -104,12 +104,13 @@ func testFork(t *testing.T, LightChain *LightChain, i, n int, comparator func(td
}
// Sanity check that the forked chain can be imported into the original
var tdPre, tdPost *big.Int
tdPre = LightChain.GetTdByHash(LightChain.CurrentHeader().Hash())
cur := LightChain.CurrentHeader()
tdPre = LightChain.GetTd(cur.Hash(), cur.Number.Uint64())
if err := testHeaderChainImport(headerChainB, LightChain); err != nil {
t.Fatalf("failed to import forked header chain: %v", err)
}
tdPost = LightChain.GetTdByHash(headerChainB[len(headerChainB)-1].Hash())
last := headerChainB[len(headerChainB)-1]
tdPost = LightChain.GetTd(last.Hash(), last.Number.Uint64())
// Compare the total difficulties of the chains
comparator(tdPre, tdPost)
}
@ -124,7 +125,8 @@ func testHeaderChainImport(chain []*types.Header, lightchain *LightChain) error
}
// Manually insert the header into the database, but don't reorganize (allows subsequent testing)
lightchain.chainmu.Lock()
rawdb.WriteTd(lightchain.chainDb, header.Hash(), header.Number.Uint64(), new(big.Int).Add(header.Difficulty, lightchain.GetTdByHash(header.ParentHash)))
rawdb.WriteTd(lightchain.chainDb, header.Hash(), header.Number.Uint64(),
new(big.Int).Add(header.Difficulty, lightchain.GetTd(header.ParentHash, header.Number.Uint64()-1)))
rawdb.WriteHeader(lightchain.chainDb, header)
lightchain.chainmu.Unlock()
}
@ -309,7 +311,7 @@ func testReorg(t *testing.T, first, second []int, td int64) {
}
// Make sure the chain total difficulty is the correct one
want := new(big.Int).Add(bc.genesisBlock.Difficulty(), big.NewInt(td))
if have := bc.GetTdByHash(bc.CurrentHeader().Hash()); have.Cmp(want) != 0 {
if have := bc.GetTd(bc.CurrentHeader().Hash(), bc.CurrentHeader().Number.Uint64()); have.Cmp(want) != 0 {
t.Errorf("total difficulty mismatch: have %v, want %v", have, want)
}
}