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routing/chainview: if the chain filter is empty, don't fetch the cfilter

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Olaoluwa Osuntokun 2017-06-08 23:10:46 -07:00
parent 885cc6b216
commit 0c134a8cb3
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GPG Key ID: 9CC5B105D03521A2
1 changed files with 10 additions and 1 deletions
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11
routing/chainview/neutrino.go
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@ -250,12 +250,21 @@ func (c *CfFilteredChainView) FilterBlock(blockHash *chainhash.Hash) (*FilteredB
Height: blockHeight, Height: blockHeight,
} }
// If we don't have any items within our current chain filter, then we
// can exit early as we don't need to fetch the filter.
c.filterMtx.RLock()
numPoints := len(c.chainFilter)
c.filterMtx.RUnlock()
if numPoints == 0 {
return filteredBlock, nil
}
// Next, using the block, hash, we'll fetch the compact filter for this // Next, using the block, hash, we'll fetch the compact filter for this
// block. We only require the regular filter as we're just looking for // block. We only require the regular filter as we're just looking for
// outpoint that have been spent. // outpoint that have been spent.
filter, err := c.p2pNode.GetCFilter(*blockHash, false) filter, err := c.p2pNode.GetCFilter(*blockHash, false)
if err != nil { if err != nil {
return filteredBlock, err return nil, err
} }
// Before we can match the filter, we'll need to map each item in our // Before we can match the filter, we'll need to map each item in our