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

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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
9 changed files with 38 additions and 84 deletions
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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)
}
}