0b810ba08e
## Description ref: #11362 --- ### Author Checklist *All items are required. Please add a note to the item if the item is not applicable and please add links to any relevant follow up issues.* I have... - [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] added `!` to the type prefix if API or client breaking change - [ ] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting)) - [ ] provided a link to the relevant issue or specification - [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/building-modules) - [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#testing) - [ ] added a changelog entry to `CHANGELOG.md` - [ ] included comments for [documenting Go code](https://blog.golang.org/godoc) - [ ] updated the relevant documentation or specification - [ ] reviewed "Files changed" and left comments if necessary - [ ] confirmed all CI checks have passed ### Reviewers Checklist *All items are required. Please add a note if the item is not applicable and please add your handle next to the items reviewed if you only reviewed selected items.* I have... - [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title - [ ] confirmed `!` in the type prefix if API or client breaking change - [ ] confirmed all author checklist items have been addressed - [ ] reviewed state machine logic - [ ] reviewed API design and naming - [ ] reviewed documentation is accurate - [ ] reviewed tests and test coverage - [ ] manually tested (if applicable)
42 lines
927 B
Go
42 lines
927 B
Go
package store
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import (
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"bytes"
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sdk "github.com/cosmos/cosmos-sdk/types"
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sdkkv "github.com/cosmos/cosmos-sdk/types/kv"
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)
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// First gets the first item.
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func First(st KVStore, start, end []byte) (kv sdkkv.Pair, ok bool) {
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iter := st.Iterator(start, end)
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if !iter.Valid() {
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return kv, false
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}
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defer iter.Close()
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return sdkkv.Pair{Key: iter.Key(), Value: iter.Value()}, true
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}
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// Last gets the last item. `end` is exclusive.
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func Last(st KVStore, start, end []byte) (kv sdkkv.Pair, ok bool) {
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iter := st.ReverseIterator(end, start)
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if !iter.Valid() {
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if v := st.Get(start); v != nil {
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return sdkkv.Pair{Key: sdk.CopyBytes(start), Value: sdk.CopyBytes(v)}, true
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}
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return kv, false
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}
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defer iter.Close()
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if bytes.Equal(iter.Key(), end) {
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// Skip this one, end is exclusive.
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iter.Next()
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if !iter.Valid() {
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return kv, false
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}
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}
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return sdkkv.Pair{Key: iter.Key(), Value: iter.Value()}, true
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}
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