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feat: deterministic map iteration (#12781)
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## Description

We should ensure that events emitted are in a deterministic order on any node.


Sorry, the previous [PR-12693](cosmos/cosmos-sdk#12693) was closed due to wrong operation.

Close: #12693 



---

### 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...

- [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [x] added `!` to the type prefix if API or client breaking change
- [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#pr-targeting))
- [x] provided a link to the relevant issue or specification
- [x] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/building-modules)
- [x] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/main/CONTRIBUTING.md#testing)
- [x] added a changelog entry to `CHANGELOG.md`
- [x] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [x] updated the relevant documentation or specification
- [x] reviewed "Files changed" and left comments if necessary
- [x] 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)
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bruce-wayne2 authored Aug 17, 2022
1 parent e130915 commit 6ed11b8
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1 change: 1 addition & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -58,6 +58,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
* [#12634](https://github.com/cosmos/cosmos-sdk/pull/12634) Move `sdk.Dec` to math package.
* [#12596](https://github.com/cosmos/cosmos-sdk/pull/12596) Remove all imports of the non-existent gogo/protobuf v1.3.3 to ease downstream use and go workspaces.
* [#12187](https://github.com/cosmos/cosmos-sdk/pull/12187) Add batch operation for x/nft module.
* [#12693](https://github.com/cosmos/cosmos-sdk/pull/12693) Make sure the order of each node is consistent when emitting proto events.
* [#12455](https://github.com/cosmos/cosmos-sdk/pull/12455) Show attempts count in error for signing.

### State Machine Breaking
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9 changes: 8 additions & 1 deletion types/events.go
Original file line number Diff line number Diff line change
Expand Up @@ -3,6 +3,8 @@ package types
import (
"encoding/json"
"fmt"
"golang.org/x/exp/maps"
"golang.org/x/exp/slices"
"reflect"
"sort"
"strings"
Expand Down Expand Up @@ -87,8 +89,13 @@ func TypedEventToEvent(tev proto.Message) (Event, error) {
return Event{}, err
}

// sort the keys to ensure the order is always the same
keys := maps.Keys(attrMap)
slices.Sort(keys)

attrs := make([]abci.EventAttribute, 0, len(attrMap))
for k, v := range attrMap {
for _, k := range keys {
v := attrMap[k]
attrs = append(attrs, abci.EventAttribute{
Key: k,
Value: string(v),
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15 changes: 15 additions & 0 deletions types/events_test.go
Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,21 @@ func (s *eventsTestSuite) TestEventManager() {
s.Require().Equal(em.Events(), events.AppendEvent(event))
}

func (s *eventsTestSuite) TestEmitTypedEvent() {
s.Run("deterministic key-value order", func() {
for i := 0; i < 10; i++ {
em := sdk.NewEventManager()
coin := sdk.NewCoin("fakedenom", sdk.NewInt(1999999))
s.Require().NoError(em.EmitTypedEvent(&coin))
s.Require().Len(em.Events(), 1)
attrs := em.Events()[0].Attributes
s.Require().Len(attrs, 2)
s.Require().Equal(attrs[0].Key, "amount")
s.Require().Equal(attrs[1].Key, "denom")
}
})
}

func (s *eventsTestSuite) TestEventManagerTypedEvents() {
em := sdk.NewEventManager()

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