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Add comments about anchorQueue (#2382)

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Co-authored-by: Alex Sharp <alexsharp@Alexs-MacBook-Pro.local>
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ledgerwatch 2021-07-16 12:46:08 +01:00 committed by GitHub
parent c0488ea919
commit eb5402ee05
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1 changed files with 6 additions and 0 deletions
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6
turbo/stages/headerdownload/header_algos.go
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@ -223,6 +223,9 @@ func (hd *HeaderDownload) extendDown(segment *ChainSegment, start, end int) (boo
}
}
// Anchor is removed from the map, but not from the anchorQueue
// This is because it is hard to find the index under which the anchor is stored in the anchorQueue
// But removal will happen anyway, in th function RequestMoreHeaders, if it disapppears from the map
delete(hd.anchors, anchor.parentHash)
// Add all headers in the segments as links to this anchor
var prevLink *Link
@ -275,6 +278,9 @@ func (hd *HeaderDownload) connect(segment *ChainSegment, start, end int) error {
break
}
}
// Anchor is removed from the map, but not from the anchorQueue
// This is because it is hard to find the index under which the anchor is stored in the anchorQueue
// But removal will happen anyway, in th function RequestMoreHeaders, if it disapppears from the map
delete(hd.anchors, anchor.parentHash)
// Iterate over headers backwards (from parents towards children)
prevLink := attachmentLink