R4R: Swap start/end in ReverseIterator#2913
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Codecov Report
@@ Coverage Diff @@
## develop #2913 +/- ##
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- Coverage 62.15% 62.08% -0.08%
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Files 212 212
Lines 17369 17255 -114
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- Hits 10796 10712 -84
+ Misses 5663 5639 -24
+ Partials 910 904 -6
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ebuchman
approved these changes
Nov 28, 2018
| var key = itr.source.Key() | ||
| if itr.isReverse { | ||
| if end != nil && bytes.Compare(key, end) <= 0 { | ||
| if start != nil && bytes.Compare(key, start) < 0 { |
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don't think we need the start != nil check here anymore, but doesn't hurt
| } | ||
| itr.source.Next() | ||
| if !itr.source.Valid() || !bytes.HasPrefix(itr.source.Key(), itr.prefix) { | ||
| itr.source.Close() |
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Was there some reason for this to be here in the first place ?
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This makes dbm.DB.ReverseIterator have the same API as the cosmos sdk's store.Store.ReverseIterator (they share the same interface, as that was the intent).
It turns out that the CosmosSDK's store.Store.ReverseIterator API as currently implemented is both different and better than what we have now in tendermint/libs/db.
With this PR, the CosmosSDK can use the tendermint/libs/db.DB as a store.Store using the db adapter in the SDK, which is needed for faster simulation (as a non-production drop-in replacement for the IAVL store in cosmos-sdk/store.IAVLStore).
See also: