feat: reset broken sync #4955
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feat: reset broken sync #4955
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stringhandler
requested changes
Nov 25, 2022
| chain_strength_comparer: &dyn ChainStrengthComparer, | ||
| ) -> Result<(), ChainStorageError> { | ||
| let metadata = db.fetch_chain_metadata()?; | ||
| // lets clear out all remaining headers that done have a matching block |
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| // lets clear out all remaining headers that done have a matching block | |
| // lets clear out all remaining headers that don't have a matching block |
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| // height it will only trim the extra headers with no blocks | ||
| rewind_to_height(db, metadata.height_of_longest_chain())?; | ||
| let all_orphan_tips = db.fetch_all_orphan_chain_tips()?; | ||
| if all_orphan_tips.is_empty() { |
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Maybe this check should be before we rewind
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I specifically did not do this as I use the rewind code here to remove the "extra" headers.
I want to "main chain" to be "clean" after this run.
The intended case is this.
Header sync downloads 10 headers.
Block sync fails after 5.
That extra 5 headers will stay on top of the main chain till we remove them again. I want to remove them at this point regardless of whether the new tip is higher than our original one.
| if all_orphan_tips.is_empty() { | ||
| // we have no orphan chain tips, we have trimmed remaining headers, we are on the best tip we have, so lets | ||
| // return ok | ||
| return Ok(BlockAddResult::OrphanBlock); |
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We should probably rename this to ChainReorgResult
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And OrphanBlock to change to NoChange
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Description
If sync fails resets chain to the highest pow chain the node locally has the data to.
Motivation and Context
See: #4866
How Has This Been Tested?
Unit tests