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Merge pull request #131 from line/brew0722/v2/feat/merge-wasmd-0.16.0…
…-alpha1 feat(wasm): x/wasm stargate migration
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package prefix | ||
|
|
||
| import ( | ||
| "bytes" | ||
|
|
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| "github.com/line/lbm-sdk/v2/store/types" | ||
| tmdb "github.com/tendermint/tm-db" | ||
| ) | ||
|
|
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| // LegacyStore is an implementation to pass the store | ||
| // to the wasmvm for tendermint/tm-db dependency. | ||
| // line/tm-db/v2 has a modification to the Iterator interface, occurred a type mismatch. | ||
| // Do not use it for any purpose other than passing it to wasmvm in x/wasm. | ||
| type LegacyStore struct { | ||
| Store | ||
| } | ||
|
|
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| func NewLegacyStore(parent types.KVStore, prefix []byte) LegacyStore { | ||
| return LegacyStore{ | ||
| Store{ | ||
| parent: parent, | ||
| prefix: prefix, | ||
| }, | ||
| } | ||
| } | ||
|
|
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| func (s LegacyStore) Iterator(start, end []byte) tmdb.Iterator { | ||
| newstart := cloneAppend(s.prefix, start) | ||
|
|
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| var newend []byte | ||
| if end == nil { | ||
| newend = cpIncr(s.prefix) | ||
| } else { | ||
| newend = cloneAppend(s.prefix, end) | ||
| } | ||
|
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| iter := s.parent.Iterator(newstart, newend) | ||
|
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| return newLegacyPrefixIterator(s.prefix, start, end, iter) | ||
| } | ||
|
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| func (s LegacyStore) ReverseIterator(start, end []byte) tmdb.Iterator { | ||
| newstart := cloneAppend(s.prefix, start) | ||
|
|
||
| var newend []byte | ||
| if end == nil { | ||
| newend = cpIncr(s.prefix) | ||
| } else { | ||
| newend = cloneAppend(s.prefix, end) | ||
| } | ||
|
|
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| iter := s.parent.ReverseIterator(newstart, newend) | ||
|
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| return newLegacyPrefixIterator(s.prefix, start, end, iter) | ||
| } | ||
|
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| func (s LegacyStore) SdkIterator(start, end []byte) types.Iterator { | ||
| return s.Store.Iterator(start, end) | ||
| } | ||
|
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| type legacyPrefixIterator struct { | ||
| prefixIterator | ||
| } | ||
|
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| func newLegacyPrefixIterator(prefix, start, end []byte, parent types.Iterator) *legacyPrefixIterator { | ||
| return &legacyPrefixIterator{ | ||
| prefixIterator{ | ||
| prefix: prefix, | ||
| start: start, | ||
| end: end, | ||
| iter: parent, | ||
| valid: parent.Valid() && bytes.HasPrefix(parent.Key(), prefix), | ||
| }, | ||
| } | ||
| } | ||
|
|
||
| // Implements Iterator | ||
| func (pi *legacyPrefixIterator) Close() { | ||
| pi.iter.Close() | ||
| } |
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