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downloader: documentation

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Co-Authored-By: holiman <martin@swende.se>
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Guillaume Ballet 2018-12-19 21:39:25 +01:00 committed by GitHub
parent 8519224d55
commit 9c4bf981eb
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4
eth/downloader/downloader.go
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@ -1491,6 +1491,10 @@ func (d *Downloader) importBlockResults(results []*fetchResult) error {
if index < len(results) {
log.Debug("Downloaded item processing failed", "number", results[index].Header.Number, "hash", results[index].Header.Hash(), "err", err)
} else {
// The InsertChain method in blockchain.go will sometimes return an out-of-bounds index,
// when it needs to preprocess blocks to import a sidechain.
// The importer will put together a new list of blocks to import, which is a superset
// of the blocks delivered from the downloader, and the indexing will be off.
log.Debug("Downloaded item processing failed on sidechain import", "index", index, "err", err)
}
return errInvalidChain