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Simplifications in headers_algo (#2035)

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Co-authored-by: Alex Sharp <alexsharp@Alexs-MacBook-Pro.local>
This commit is contained in:
ledgerwatch 2021-05-27 18:47:50 +01:00 committed by GitHub
parent 2d3020982d
commit 3a7d001383
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 35 deletions
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38
turbo/stages/headerdownload/header_algos.go
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@ -145,20 +145,8 @@ func (hd *HeaderDownload) removeUpwards(toRemove []*Link) {
func (hd *HeaderDownload) markPreverified(link *Link) {
// Go through all parent links that are not preveried and mark them too
// var prevLink *Link
for link != nil && !link.preverified {
link.preverified = true
// if prevLink != nil && len(link.next) > 1 {
// // Remove all non-canonical links
// var toRemove []*Link
// for _, n := range link.next {
// if n != prevLink {
// toRemove = append(toRemove, n)
// }
// }
// hd.removeUpwards(toRemove)
// link.next = append(link.next[:0], prevLink)
// }
link = hd.links[link.header.ParentHash]
}
}
@ -168,24 +156,23 @@ func (hd *HeaderDownload) extendUp(segment *ChainSegment, start, end int) error
// Find attachment link again
linkHeader := segment.Headers[end-1]
attachmentLink, attaching := hd.getLink(linkHeader.ParentHash)
if attaching {
if !attaching {
return fmt.Errorf("extendUp attachment link not found for %x", linkHeader.ParentHash)
}
if attachmentLink.preverified && len(attachmentLink.next) > 0 {
return fmt.Errorf("cannot extendUp from preverified link %d with children", attachmentLink.blockHeight)
}
// Iterate over headers backwards (from parents towards children)
prevLink := attachmentLink
for i := end - 1; i >= start; i-- {
header := segment.Headers[i]
link := hd.addHeaderAsLink(header, false /* persisted */)
link := hd.addHeaderAsLink(segment.Headers[i], false /* persisted */)
prevLink.next = append(prevLink.next, link)
prevLink = link
if _, ok := hd.preverifiedHashes[header.Hash()]; ok {
if _, ok := hd.preverifiedHashes[link.hash]; ok {
hd.markPreverified(link)
}
}
} else {
return fmt.Errorf("extendUp attachment link not found for %x", linkHeader.ParentHash)
}
if attachmentLink.persisted {
link := hd.links[linkHeader.Hash()]
hd.insertList = append(hd.insertList, link)
@ -226,8 +213,7 @@ func (hd *HeaderDownload) extendDown(segment *ChainSegment, start, end int) (boo
// Add all headers in the segments as links to this anchor
var prevLink *Link
for i := end - 1; i >= start; i-- {
header := segment.Headers[i]
link := hd.addHeaderAsLink(header, false /* pesisted */)
link := hd.addHeaderAsLink(segment.Headers[i], false /* pesisted */)
if prevLink == nil {
newAnchor.links = append(newAnchor.links, link)
} else {
@ -235,7 +221,7 @@ func (hd *HeaderDownload) extendDown(segment *ChainSegment, start, end int) (boo
}
prevLink = link
if !anchorPreverified {
if _, ok := hd.preverifiedHashes[header.Hash()]; ok {
if _, ok := hd.preverifiedHashes[link.hash]; ok {
hd.markPreverified(link)
}
}
@ -279,12 +265,11 @@ func (hd *HeaderDownload) connect(segment *ChainSegment, start, end int) error {
// Iterate over headers backwards (from parents towards children)
prevLink := attachmentLink
for i := end - 1; i >= start; i-- {
header := segment.Headers[i]
link := hd.addHeaderAsLink(header, false /* persisted */)
link := hd.addHeaderAsLink(segment.Headers[i], false /* persisted */)
prevLink.next = append(prevLink.next, link)
prevLink = link
if !anchorPreverified {
if _, ok := hd.preverifiedHashes[header.Hash()]; ok {
if _, ok := hd.preverifiedHashes[link.hash]; ok {
hd.markPreverified(link)
}
}
@ -335,7 +320,7 @@ func (hd *HeaderDownload) newAnchor(segment *ChainSegment, start, end int, peerI
prevLink.next = append(prevLink.next, link)
}
prevLink = link
if _, ok := hd.preverifiedHashes[header.Hash()]; ok {
if _, ok := hd.preverifiedHashes[link.hash]; ok {
hd.markPreverified(link)
}
}
@ -594,6 +579,7 @@ func (hd *HeaderDownload) InsertHeaders(hf func(header *types.Header, blockHeigh
heap.Remove(hd.linkQueue, link.idx)
}
if skip {
delete(hd.links, link.hash)
continue
}
if err := hf(link.header, link.blockHeight); err != nil {