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core, eth, les: more efficient hash-based header chain retrieval (#16946)

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Felföldi Zsolt
2018-06-12 15:52:54 +02:00
committed by Péter Szilágyi
parent 0255951587
commit 049f5b3572
5 changed files with 106 additions and 27 deletions
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12
core/blockchain.go
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@ -1524,6 +1524,18 @@ func (bc *BlockChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []com
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.
//
// Note: ancestor == 0 returns the same block, 1 returns its parent and so on.
func (bc *BlockChain) GetAncestor(hash common.Hash, number, ancestor uint64, maxNonCanonical *uint64) (common.Hash, uint64) {
bc.chainmu.Lock()
defer bc.chainmu.Unlock()
return bc.hc.GetAncestor(hash, number, ancestor, maxNonCanonical)
}
// GetHeaderByNumber retrieves a block header from the database by number,
// caching it (associated with its hash) if found.
func (bc *BlockChain) GetHeaderByNumber(number uint64) *types.Header {