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eth/fetcher: throttle tx fetches to 128KB responses #28304

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merged 2 commits into from
Oct 11, 2023
Merged

eth/fetcher: throttle tx fetches to 128KB responses #28304

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eth/fetcher: throttle tx fetches to 128KB responses
karalabe Oct 10, 2023
9fb7c9a
eth/fetcher: unindent a clause per review request
karalabe Oct 11, 2023
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40 changes: 21 additions & 19 deletions eth/fetcher/tx_fetcher.go
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Original file line number Diff line number Diff line change
Expand Up @@ -870,29 +870,31 @@ func (f *TxFetcher) scheduleFetches(timer *mclock.Timer, timeout chan struct{},
bytes uint64
)
f.forEachAnnounce(f.announces[peer], func(hash common.Hash, meta *txMetadata) bool {
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if _, ok := f.fetching[hash]; !ok {
// Mark the hash as fetching and stash away possible alternates
f.fetching[hash] = peer
// If the transaction is alcear fetching, skip to the next one
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alcear 👀

if _, ok := f.fetching[hash]; ok {
return true
}
// Mark the hash as fetching and stash away possible alternates
f.fetching[hash] = peer

if _, ok := f.alternates[hash]; ok {
panic(fmt.Sprintf("alternate tracker already contains fetching item: %v", f.alternates[hash]))
}
f.alternates[hash] = f.announced[hash]
delete(f.announced, hash)
if _, ok := f.alternates[hash]; ok {
panic(fmt.Sprintf("alternate tracker already contains fetching item: %v", f.alternates[hash]))
}
f.alternates[hash] = f.announced[hash]
delete(f.announced, hash)

// Accumulate the hash and stop if the limit was reached
hashes = append(hashes, hash)
if len(hashes) >= maxTxRetrievals {
return false // break in the for-each
}
if meta != nil { // Only set eth/68 and upwards
bytes += uint64(meta.size)
if bytes >= maxTxRetrievalSize {
return false
}
// Accumulate the hash and stop if the limit was reached
hashes = append(hashes, hash)
if len(hashes) >= maxTxRetrievals {
return false // break in the for-each
}
if meta != nil { // Only set eth/68 and upwards
bytes += uint64(meta.size)
if bytes >= maxTxRetrievalSize {
return false
}
}
return true // continue in the for-each
return true // scheduled, try to add more
})
// If any hashes were allocated, request them from the peer
if len(hashes) > 0 {
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