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02-client refactor (cosmos#1871)
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* chore: Remove GetClientID() From Misbehaviour Interface (#897)

* chore: remove GetClientID() from Misbehaviour interface

* chore: changed too much

* chore: fix test and add changelog entry

Co-authored-by: Shake Shack <shakeshack@Shakes-MacBook-Pro.local>

* chore: add 668 functions to localhost client (#908)

* chore: rename 06-solomachine type Misbehaviour to DuplicateSignatures (#1093)

* updating protos and codegen

* renaming solomachine Mishaviour to DuplicateSignatureHeader

* renaming DuplicateSignatureHeader to DuplicateSignatures

* updating changelog and godocs as per review

* chore: reverting renaming of Misbehaviour (#1099)

* remove GetClientID from 07-tendermint misbehaviour (#1097)

* remove GetClientID from 07-tendermint misbehaviour and deprecate the ClientId field in 07-tendermint Misbehaviour

* add changelog entry

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

* chore: remove GetClientID from 06-solomachine type Misbehaviour (#1100)

* reverting renaming of Misbehaviour

* removing client id from 06-solomachine type Misbehaviour

* adding changelog

* client-02 update to latest from main (#1106)

* refactor: allow the mock module to be used multiple times as base ibc application in middleware stack (#892)

## Description

Currently the `AppModule` assumes a single scoped keeper. This doesn't allow the mock module to be used as a base application for different middleware stack (ica stack, fee stack, etc)

I broke the API because I think it is cleaner. If we want this to be non API breaking, I can try to readjust

ref: #891 

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- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
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- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
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* feat: adding Pack/Unpack acknowledgement helper fns (#895)

* feat: adding Pack/Unpack acknowledgement helper fns

* chore: changelog

* fix: docs

* Update modules/core/04-channel/types/codec.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* imp: support custom keys for testing (#893)

* chore: add ParsePacketFromEvents testing helper function (#904)

## Description



ref: #891

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* fix: correctly claim capability for mock module, handle genesis exports (#921)

## Description

This contains two fixes:
- the capability being claimed by the scoped keeper was incorrect (mock.ModuleName -> port ID)
- the mock module wasn't accounting for non empty genesis state in capabilities (after genesis export, capability will create the bound ports so rebinding doesn't need to happen)

closes: #XXXX

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* docs: update migration docs for upgrade proposal in relation to ICS27 (#920)

## Description



closes: #XXXX

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* chore(ica): add trail of bits audit report (#903)

* chore(ica): add trail of bits audit report

* relocate the audit report for ICA

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* testing: adding multiple sender accounts for testing purposes (#935)

* testing: adding multiple sender accounts for testing puproses

* fix genesis setup (#936)

* Update testing/chain.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* refactor: code hygiene

* Update testing/chain.go

Co-authored-by: Aditya <adityasripal@gmail.com>

* fix: setting totalySupply to empty

* nit: CamelCase not UPPERCASE

Co-authored-by: Aditya <adityasripal@gmail.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* Create test chain with multiple validators (#942)

* testing: adding multiple sender accounts for testing puproses

* fix genesis setup (#936)

* Update testing/chain.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* refactor: code hygiene

* Update testing/chain.go

Co-authored-by: Aditya <adityasripal@gmail.com>

* multi validator commit taken from @saione

* add function to pass custom valset

* add changelog

Co-authored-by: Sean King <sean@seking.dev>
Co-authored-by: Sean King <seantking@users.noreply.github.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* add changelog entry for SDK bump

* fix: classify client states without consensus states as expired (#941)

## Description



closes: #850 

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* chore: fix broken link (#972)

* add backport actions for v1.3.x and v2.1.x (#958)

* Revert "feat: adding Pack/Unpack acknowledgement helper fns (#895)" (#973)

This reverts commit 843b459635da8cedd92945141c4efe3a762f305d.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* chore: update migration docs (#985)

* chore: update migration docs

* Update docs/migrations/v2-to-v3.md

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

* chore: fix mispelled words (#991)

* fix: remove go mod tidy from proto-gen script (#989)

* bug: support base denoms with slashes (#978)

* bug: support base denoms with slashes

* add changelog entry

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* upgrade ics23 to v0.7 (#948)

* upgrade ics23 to v0.7-rc

* add changelog entry

* update ics23 to final 0.7

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* ibctesting: make `testing.T` public (#1020)

* add changelog entry for #941

* fix package import (#1007)

* feat: Add a function to initialize the ICS27 module via an upgrade proposal (#1037)

## Description



closes: #1034 

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* docs: add missing args to NewKeeper in integration docs (#1038)

## Description



This add some missing arguments to `ibckeeper.NewKeeper` and `ibctransferkeeper.NewKeeper` in integration docs

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* small fixes for v2 to v3 migration (#1016)

* small fixes for v2 to v3 migration

* review comment

* Update v2-to-v3.md

* add store upgrade documentation

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* add missing slash

* build(deps): bump actions/checkout from 2.4.0 to 3 (#1045)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.
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<p><em>Sourced from <a href="https://github.com/actions/checkout/releases">actions/checkout's releases</a>.</em></p>
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<h2>v3.0.0</h2>
<ul>
<li>Update default runtime to node16</li>
</ul>
</blockquote>
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<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/actions/checkout/blob/main/CHANGELOG.md">actions/checkout's changelog</a>.</em></p>
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<h1>Changelog</h1>
<h2>v2.3.1</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/284">Fix default branch resolution for .wiki and when using SSH</a></li>
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<h2>v2.3.0</h2>
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<h2>v2.2.0</h2>
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<h2>v2.1.1</h2>
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<h2>v2.1.0</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/191">Group output</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/199">Changes to support GHES alpha release</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/184">Persist core.sshCommand for submodules</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/163">Add support ssh</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/179">Convert submodule SSH URL to HTTPS, when not using SSH</a></li>
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<h2>v2 (beta)</h2>
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<ul>
<li>The default behavior now fetches only the SHA being checked-out</li>
</ul>
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<li>Script authenticated git commands
<ul>
<li>Persists <code>with.token</code> in the local git config</li>
<li>Enables your scripts to run authenticated git commands</li>
<li>Post-job cleanup removes the token</li>
<li>Coming soon: Opt out by setting <code>with.persist-credentials</code> to <code>false</code></li>
</ul>
</li>
<li>Creates a local branch
<ul>
<li>No longer detached HEAD when checking out a branch</li>
<li>A local branch is created with the corresponding upstream branch set</li>
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</blockquote>
<p>... (truncated)</p>
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<li><a href="https://github.com/actions/checkout/commit/a12a3943b4bdde767164f792f33f40b04645d846"><code>a12a394</code></a> update readme for v3 (<a href="https://github-redirect.dependabot.com/actions/checkout/issues/708">#708</a>)</li>
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<li><a href="https://github.com/actions/checkout/commit/230611dbd0eb52da1e1f4f7bc8bb0c3a339fc8b7"><code>230611d</code></a> Change secret name for PAT to not start with GITHUB_ (<a href="https://github-redirect.dependabot.com/actions/checkout/issues/623">#623</a>)</li>
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</details>

* call packet.GetSequence() rather than passing the func as argument (#995)

* Add counterpartyChannelID param to IBCModule.OnChanOpenAck (#1086)

* add counterpartyChannelID param to IBCModule OnChanOpenAck()

* change testing mock

* change ica IBCModules ChannelOpenAck

* change transfer IBCModules ChannelOpenAck

* change core keeper ChannelOpenAck()

* CHANGELOG.md

* update v2-to-v3 migration doc

* Update docs/migrations/v2-to-v3.md

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

* fix mirgation docs (#1091)

* fix: handle testing update client errors (#1094)

* replace channel keeper with IBC keeper in AnteDecorator (#950)

* replace channel keeper with IBC keeper in AnteDecorator and pass message to rpc handler

* fix error checking condition

* fix for proper way of getting go context

* refactor tests for ante handler

* review comment

* review comments and some fixes

* review comments

* execute message for update client as well

* add migration

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* add backport rules for v1.4.x and v2.2.x (#1085)

* ibctesting: custom voting power reduction for testing (#939)

* ibctesting: custom voting power reduction for testing

* changelog

* fix

* make T public

* fix

* revert changes

* fix test

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>
Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Carlos Rodriguez <carlos@interchain.io>
Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>
Co-authored-by: Aditya <adityasripal@gmail.com>
Co-authored-by: Tim Lind <tim@incremental.co>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Damian Nolan <damiannolan@gmail.com>
Co-authored-by: daeMOn <flavien.binet@gmail.com>
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* 02-client: merge misbehavior & header interfaces (#1107)

* refactor: allow the mock module to be used multiple times as base ibc application in middleware stack (#892)

## Description

Currently the `AppModule` assumes a single scoped keeper. This doesn't allow the mock module to be used as a base application for different middleware stack (ica stack, fee stack, etc)

I broke the API because I think it is cleaner. If we want this to be non API breaking, I can try to readjust

ref: #891 

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
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- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes

* feat: adding Pack/Unpack acknowledgement helper fns (#895)

* feat: adding Pack/Unpack acknowledgement helper fns

* chore: changelog

* fix: docs

* Update modules/core/04-channel/types/codec.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* imp: support custom keys for testing (#893)

* chore: add ParsePacketFromEvents testing helper function (#904)

## Description



ref: #891

---

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- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes

* fix: correctly claim capability for mock module, handle genesis exports (#921)

## Description

This contains two fixes:
- the capability being claimed by the scoped keeper was incorrect (mock.ModuleName -> port ID)
- the mock module wasn't accounting for non empty genesis state in capabilities (after genesis export, capability will create the bound ports so rebinding doesn't need to happen)

closes: #XXXX

---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [ ] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes

* docs: update migration docs for upgrade proposal in relation to ICS27 (#920)

## Description



closes: #XXXX

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- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
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* chore(ica): add trail of bits audit report (#903)

* chore(ica): add trail of bits audit report

* relocate the audit report for ICA

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* testing: adding multiple sender accounts for testing purposes (#935)

* testing: adding multiple sender accounts for testing puproses

* fix genesis setup (#936)

* Update testing/chain.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* refactor: code hygiene

* Update testing/chain.go

Co-authored-by: Aditya <adityasripal@gmail.com>

* fix: setting totalySupply to empty

* nit: CamelCase not UPPERCASE

Co-authored-by: Aditya <adityasripal@gmail.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* Create test chain with multiple validators (#942)

* testing: adding multiple sender accounts for testing puproses

* fix genesis setup (#936)

* Update testing/chain.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* refactor: code hygiene

* Update testing/chain.go

Co-authored-by: Aditya <adityasripal@gmail.com>

* multi validator commit taken from @saione

* add function to pass custom valset

* add changelog

Co-authored-by: Sean King <sean@seking.dev>
Co-authored-by: Sean King <seantking@users.noreply.github.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* add changelog entry for SDK bump

* fix: classify client states without consensus states as expired (#941)

## Description



closes: #850 

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- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
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* chore: fix broken link (#972)

* add backport actions for v1.3.x and v2.1.x (#958)

* Revert "feat: adding Pack/Unpack acknowledgement helper fns (#895)" (#973)

This reverts commit 843b459635da8cedd92945141c4efe3a762f305d.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* chore: update migration docs (#985)

* chore: update migration docs

* Update docs/migrations/v2-to-v3.md

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

* chore: fix mispelled words (#991)

* fix: remove go mod tidy from proto-gen script (#989)

* bug: support base denoms with slashes (#978)

* bug: support base denoms with slashes

* add changelog entry

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* upgrade ics23 to v0.7 (#948)

* upgrade ics23 to v0.7-rc

* add changelog entry

* update ics23 to final 0.7

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* ibctesting: make `testing.T` public (#1020)

* add changelog entry for #941

* fix package import (#1007)

* feat: Add a function to initialize the ICS27 module via an upgrade proposal (#1037)

## Description



closes: #1034 

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* docs: add missing args to NewKeeper in integration docs (#1038)

## Description



This add some missing arguments to `ibckeeper.NewKeeper` and `ibctransferkeeper.NewKeeper` in integration docs

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* small fixes for v2 to v3 migration (#1016)

* small fixes for v2 to v3 migration

* review comment

* Update v2-to-v3.md

* add store upgrade documentation

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* add missing slash

* build(deps): bump actions/checkout from 2.4.0 to 3 (#1045)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/actions/checkout/releases">actions/checkout's releases</a>.</em></p>
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<h2>v3.0.0</h2>
<ul>
<li>Update default runtime to node16</li>
</ul>
</blockquote>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/actions/checkout/blob/main/CHANGELOG.md">actions/checkout's changelog</a>.</em></p>
<blockquote>
<h1>Changelog</h1>
<h2>v2.3.1</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/284">Fix default branch resolution for .wiki and when using SSH</a></li>
</ul>
<h2>v2.3.0</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/278">Fallback to the default branch</a></li>
</ul>
<h2>v2.2.0</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/258">Fetch all history for all tags and branches when fetch-depth=0</a></li>
</ul>
<h2>v2.1.1</h2>
<ul>
<li>Changes to support GHES (<a href="https://github-redirect.dependabot.com/actions/checkout/pull/236">here</a> and <a href="https://github-redirect.dependabot.com/actions/checkout/pull/248">here</a>)</li>
</ul>
<h2>v2.1.0</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/191">Group output</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/199">Changes to support GHES alpha release</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/184">Persist core.sshCommand for submodules</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/163">Add support ssh</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/179">Convert submodule SSH URL to HTTPS, when not using SSH</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/157">Add submodule support</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/144">Follow proxy settings</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/141">Fix ref for pr closed event when a pr is merged</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/128">Fix issue checking detached when git less than 2.22</a></li>
</ul>
<h2>v2.0.0</h2>
<ul>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/108">Do not pass cred on command line</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/107">Add input persist-credentials</a></li>
<li><a href="https://github-redirect.dependabot.com/actions/checkout/pull/104">Fallback to REST API to download repo</a></li>
</ul>
<h2>v2 (beta)</h2>
<ul>
<li>Improved fetch performance
<ul>
<li>The default behavior now fetches only the SHA being checked-out</li>
</ul>
</li>
<li>Script authenticated git commands
<ul>
<li>Persists <code>with.token</code> in the local git config</li>
<li>Enables your scripts to run authenticated git commands</li>
<li>Post-job cleanup removes the token</li>
<li>Coming soon: Opt out by setting <code>with.persist-credentials</code> to <code>false</code></li>
</ul>
</li>
<li>Creates a local branch
<ul>
<li>No longer detached HEAD when checking out a branch</li>
<li>A local branch is created with the corresponding upstream branch set</li>
</ul>
</li>
<li>Improved layout</li>
</ul>

</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/actions/checkout/commit/a12a3943b4bdde767164f792f33f40b04645d846"><code>a12a394</code></a> update readme for v3 (<a href="https://github-redirect.dependabot.com/actions/checkout/issues/708">#708</a>)</li>
<li><a href="https://github.com/actions/checkout/commit/8f9e05e482293f862823fcca12d9eddfb3723131"><code>8f9e05e</code></a> Update to node 16 (<a href="https://github-redirect.dependabot.com/actions/checkout/issues/689">#689</a>)</li>
<li><a href="https://github.com/actions/checkout/commit/230611dbd0eb52da1e1f4f7bc8bb0c3a339fc8b7"><code>230611d</code></a> Change secret name for PAT to not start with GITHUB_ (<a href="https://github-redirect.dependabot.com/actions/checkout/issues/623">#623</a>)</li>
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</details>

* call packet.GetSequence() rather than passing the func as argument (#995)

* Add counterpartyChannelID param to IBCModule.OnChanOpenAck (#1086)

* add counterpartyChannelID param to IBCModule OnChanOpenAck()

* change testing mock

* change ica IBCModules ChannelOpenAck

* change transfer IBCModules ChannelOpenAck

* change core keeper ChannelOpenAck()

* CHANGELOG.md

* update v2-to-v3 migration doc

* Update docs/migrations/v2-to-v3.md

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

* fix mirgation docs (#1091)

* fix: handle testing update client errors (#1094)

* replace channel keeper with IBC keeper in AnteDecorator (#950)

* replace channel keeper with IBC keeper in AnteDecorator and pass message to rpc handler

* fix error checking condition

* fix for proper way of getting go context

* refactor tests for ante handler

* review comment

* review comments and some fixes

* review comments

* execute message for update client as well

* add migration

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* add backport rules for v1.4.x and v2.2.x (#1085)

* ibctesting: custom voting power reduction for testing (#939)

* ibctesting: custom voting power reduction for testing

* changelog

* fix

* make T public

* fix

* revert changes

* fix test

* merging Header & Misbehavior interfaces into ClientMessage & fixing associated 02-client helpers

* fix: update related functions

* chore: comments

* Update modules/core/02-client/types/encoding.go

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

* chore: changelog

* chore: comment

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>
Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: Carlos Rodriguez <carlos@interchain.io>
Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>
Co-authored-by: Aditya <adityasripal@gmail.com>
Co-authored-by: Tim Lind <tim@incremental.co>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Damian Nolan <damiannolan@gmail.com>
Co-authored-by: daeMOn <flavien.binet@gmail.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Joe Bowman <joe@ingenuity.build>
Co-authored-by: khanh <50263489+catShaark@users.noreply.github.com>

* chore: 06-solomachine rename checkHeader to VerifyClientMessage (#1109)

* adding VerifyClientMessage and tests

* splitting tests for verify header and misbehaviour

* cleaning up error handling

* adding additional test for old misbehaviour is sucessful

* split type switch logic into verifyHeader and verifyMisbehaviour priv funcs

* updating godoc for VerifyClientMessage

* refactor: modify VerifyUpgradeAndUpdateState to set upgraded client and consensus state (#598)

* modify VerifyUpgradeAndUpdateState interface function to remove returned client and consensus state

removes the client and consensus state from the return values in VerifyUpgradeAndUpdateState client state interface function
Updates light client implementations to set client and consensus state in client store
Fixes and updates tests

* add changelog entry

* add migration docs

* use upgraded client to emit height in events

* chore: 06-solomachine rename update to UpdateState (#1110)

* adding VerifyClientMessage and tests

* splitting tests for verify header and misbehaviour

* rename update to UpdateState

* cleaning up error handling

* adding additional test for old misbehaviour is sucessful

* split type switch logic into verifyHeader and verifyMisbehaviour priv funcs

* adding in place test function for solomachine UpdateState

* rename update to UpdateState

* adding in place test function for solomachine UpdateState

* chore: 06-solomachine adding CheckForMisbehaviour and UpdateStateOnMisbehaviour (#1111)

* adding VerifyClientMessage and tests

* splitting tests for verify header and misbehaviour

* rename update to UpdateState

* adding CheckForMisbehaviour and UpdateStateOnMisbehaviour

* adding misbehaviour checks

* updating CheckForMisbehaviour codestyle and adding basic test cases

* chore: 02-client-refactor: merge main into feature branch (#1149)

* refactor: allow the mock module to be used multiple times as base ibc application in middleware stack (#892)

## Description

Currently the `AppModule` assumes a single scoped keeper. This doesn't allow the mock module to be used as a base application for different middleware stack (ica stack, fee stack, etc)

I broke the API because I think it is cleaner. If we want this to be non API breaking, I can try to readjust

ref: #891 

---

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- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes

* feat: adding Pack/Unpack acknowledgement helper fns (#895)

* feat: adding Pack/Unpack acknowledgement helper fns

* chore: changelog

* fix: docs

* Update modules/core/04-channel/types/codec.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* imp: support custom keys for testing (#893)

* chore: add ParsePacketFromEvents testing helper function (#904)

## Description



ref: #891

---

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- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
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- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes

* fix: correctly claim capability for mock module, handle genesis exports (#921)

## Description

This contains two fixes:
- the capability being claimed by the scoped keeper was incorrect (mock.ModuleName -> port ID)
- the mock module wasn't accounting for non empty genesis state in capabilities (after genesis export, capability will create the bound ports so rebinding doesn't need to happen)

closes: #XXXX

---

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- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
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- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes

* docs: update migration docs for upgrade proposal in relation to ICS27 (#920)

## Description



closes: #XXXX

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* chore(ica): add trail of bits audit report (#903)

* chore(ica): add trail of bits audit report

* relocate the audit report for ICA

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* testing: adding multiple sender accounts for testing purposes (#935)

* testing: adding multiple sender accounts for testing puproses

* fix genesis setup (#936)

* Update testing/chain.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* refactor: code hygiene

* Update testing/chain.go

Co-authored-by: Aditya <adityasripal@gmail.com>

* fix: setting totalySupply to empty

* nit: CamelCase not UPPERCASE

Co-authored-by: Aditya <adityasripal@gmail.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* Create test chain with multiple validators (#942)

* testing: adding multiple sender accounts for testing puproses

* fix genesis setup (#936)

* Update testing/chain.go

Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* refactor: code hygiene

* Update testing/chain.go

Co-authored-by: Aditya <adityasripal@gmail.com>

* multi validator commit taken from @saione

* add function to pass custom valset

* add changelog

Co-authored-by: Sean King <sean@seking.dev>
Co-authored-by: Sean King <seantking@users.noreply.github.com>
Co-authored-by: colin axnér <25233464+colin-axner@users.noreply.github.com>

* add changelog entry for SDK bump

* fix: classify client states without consensus states as expired (#941)

## Description



closes: #850 

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* chore: fix broken link (#972)

* add backport actions for v1.3.x and v2.1.x (#958)

* Revert "feat: adding Pack/Unpack acknowledgement helper fns (#895)" (#973)

This reverts commit 843b459635da8cedd92945141c4efe3a762f305d.

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

* chore: update migration docs (#985)

* chore: update migration docs

* Update docs/migrations/v2-to-v3.md

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

Co-authored-by: Damian Nolan <damiannolan@gmail.com>

* chore: fix mispelled words (#991)

* fix: remove go mod tidy from proto-gen script (#989)

* bug: support base denoms with slashes (#978)

* bug: support base denoms with slashes

* add changelog entry

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* upgrade ics23 to v0.7 (#948)

* upgrade ics23 to v0.7-rc

* add changelog entry

* update ics23 to final 0.7

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* ibctesting: make `testing.T` public (#1020)

* add changelog entry for #941

* fix package import (#1007)

* feat: Add a function to initialize the ICS27 module via an upgrade proposal (#1037)

## Description



closes: #1034 

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* docs: add missing args to NewKeeper in integration docs (#1038)

## Description



This add some missing arguments to `ibckeeper.NewKeeper` and `ibctransferkeeper.NewKeeper` in integration docs

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* small fixes for v2 to v3 migration (#1016)

* small fixes for v2 to v3 migration

* review comment

* Update v2-to-v3.md

* add store upgrade documentation

Co-authored-by: Carlos Rodriguez <crodveg@gmail.com>

* add missing slash

* build(deps): bump actions/checkout from 2.4.0 to 3 (#1045)

Bumps [actions/checkout](https://github.com/actions/checkout) from 2.4.0 to 3.
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</details>

* call packet.GetSequence() rather than passing the func as argument (#995)

* Add counterpartyChannelID param to IBCModule.OnChanOpenAck (#1086)

* add counterpartyChannelID param to IBCModule OnChanOpenAck()

* change testing mock

* change ica IBCModules ChannelOpenAck

* change transfer IBCModules ChannelOpenAck

* change core keeper ChannelOpenAck()

* CHANGELOG.md

* update v2-to-v3 migration doc

* Update docs/migrations/v2-to-v3.md

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

Co-authored-by: Carlos Rodriguez <carlos@interchain.io>

* fix mirgation …
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36 changes: 34 additions & 2 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -44,7 +44,7 @@ Ref: https://keepachangelog.com/en/1.0.0/

### API Breaking

* (core/03-connection) [\#1797](https://github.com/cosmos/ibc-go/pull/1797) Remove `PreviousConnectionID` from `NewMsgConnectionOpenTry` arguments. `MsgConnectionOpenTry.ValidateBasic()` returns error if the deprecated `PreviousConnectionID` is not empty.
* (core/03-connection) [\#1797](https://github.com/cosmos/ibc-go/pull/1797) Remove `PreviousConnectionID` from `NewMsgConnectionOpenTry` arguments. `MsgConnectionOpenTry.ValidateBasic()` returns error if the deprecated `PreviousConnectionID` is not empty
* (core/04-channel) [\#1792](https://github.com/cosmos/ibc-go/pull/1792) Remove `PreviousChannelID` from `NewMsgChannelOpenTry` arguments. `MsgChannelOpenTry.ValidateBasic()` returns error if the deprecated `PreviousChannelID` is not empty.
* (core/04-channel) [\#1418](https://github.com/cosmos/ibc-go/pull/1418) `NewPacketId` has been renamed to `NewPacketID` to comply with go linting rules.
* (core/ante) [\#1418](https://github.com/cosmos/ibc-go/pull/1418) `AnteDecorator` has been renamed to `RedundancyDecorator` to comply with go linting rules and to give more clarity to the purpose of the Decorator.
Expand All @@ -61,6 +61,18 @@ Ref: https://keepachangelog.com/en/1.0.0/
* (transfer)[\#1565](https://github.com/cosmos/ibc-go/pull/1565) Removing `NewErrorAcknowledgement` in favour of `channeltypes.NewErrorAcknowledgement`.
* (channel)[\#1565](https://github.com/cosmos/ibc-go/pull/1565) Updating `NewErrorAcknowledgement` to accept an error instead of a string and removing the possibility of non-deterministic writes to application state.
* (core/04-channel)[\#1636](https://github.com/cosmos/ibc-go/pull/1636) Removing `SplitChannelVersion` and `MergeChannelVersions` functions since they are not used.
-
* (06-solomachine) [\#1679](https://github.com/cosmos/ibc-go/pull/1679) Remove `types` sub-package from `06-solomachine` lightclient directory.
* (07-tendermint) [\#1677](https://github.com/cosmos/ibc-go/pull/1677) Remove `types` sub-package from `07-tendermint` lightclient directory.
* (06-solomachine) [\#1687](https://github.com/cosmos/ibc-go/pull/1687) Bump `06-solomachine` protobuf version from `v2` to `v3`.
* (06-solomachine) [\#1687](https://github.com/cosmos/ibc-go/pull/1687) Removed `DataType` enum and associated message types from `06-solomachine`. `DataType` has been removed from `SignBytes` and `SignatureAndData` in favour of `path`.
* (02-client) [\#598](https://github.com/cosmos/ibc-go/pull/598) The client state and consensus state return value has been removed from `VerifyUpgradeAndUpdateState`. Light client implementations must update the client state and consensus state after verifying a valid client upgrade.
* (06-solomachine) [\#1100](https://github.com/cosmos/ibc-go/pull/1100) Remove `GetClientID` function from 06-solomachine `Misbehaviour` type.
* (06-solomachine) [\#1100](https://github.com/cosmos/ibc-go/pull/1100) Deprecate `ClientId` field in 06-solomachine `Misbehaviour` type.
* (07-tendermint) [\#1097](https://github.com/cosmos/ibc-go/pull/1097) Remove `GetClientID` function from 07-tendermint `Misbehaviour` type.
* (07-tendermint) [\#1097](https://github.com/cosmos/ibc-go/pull/1097) Deprecate `ClientId` field in 07-tendermint `Misbehaviour` type.
* (modules/core/exported) [\#1107](https://github.com/cosmos/ibc-go/pull/1107) Merging the `Header` and `Misbehaviour` interfaces into a single `ClientMessage` type.
* (07-tendermint) [\#1896](https://github.com/cosmos/ibc-go/pull/1896) Remove error return from `IterateConsensusStateAscending` in `07-tendermint`.

### State Machine Breaking

Expand All @@ -79,7 +91,22 @@ Ref: https://keepachangelog.com/en/1.0.0/
* (app/29-fee) [\#1341](https://github.com/cosmos/ibc-go/pull/1341) Check if the fee module is locked and if the fee module is enabled before refunding all fees
* (transfer) [\#1414](https://github.com/cosmos/ibc-go/pull/1414) Emitting Sender address from `fungible_token_packet` events in `OnRecvPacket` and `OnAcknowledgementPacket`.
* (testing/simapp) [\#1397](https://github.com/cosmos/ibc-go/pull/1397) Adding mock module to maccperms and adding check to ensure mock module is not a blocked account address.
-
* (modules/light-clients/07-tendermint) [\#1713](https://github.com/cosmos/ibc-go/pull/1713) Allow client upgrade proposals to update `TrustingPeriod`. See ADR-026 for context.
* (modules/core/02-client) [\#1188](https://github.com/cosmos/ibc-go/pull/1188/files) Routing `MsgSubmitMisbehaviour` to `UpdateClient` keeper function. Deprecating `SubmitMisbehaviour` endpoint.
* (modules/core/02-client) [\#1208](https://github.com/cosmos/ibc-go/pull/1208) Replace `CheckHeaderAndUpdateState` usage in 02-client with calls to `VerifyClientMessage`, `CheckForMisbehaviour`, `UpdateStateOnMisbehaviour` and `UpdateState`.
* (modules/light-clients/09-localhost) [\#1187](https://github.com/cosmos/ibc-go/pull/1187/) Removing localhost light client implementation as it is not functional. An upgrade handler is provided in `modules/migrations/v5` to prune `09-localhost` clients and consensus states from the store.
* [\#1186](https://github.com/cosmos/ibc-go/pull/1186/files) Removing `GetRoot` function from ConsensusState interface in `02-client`. `GetRoot` is unused by core IBC.
* (modules/core/02-client) [\#1196](https://github.com/cosmos/ibc-go/pull/1196) Adding VerifyClientMessage to ClientState interface.
* (modules/core/02-client) [\#1198](https://github.com/cosmos/ibc-go/pull/1198) Adding UpdateStateOnMisbehaviour to ClientState interface.
* (modules/core/02-client) [\#1170](https://github.com/cosmos/ibc-go/pull/1170) Updating `ClientUpdateProposal` to set client state in lightclient implementations `CheckSubstituteAndUpdateState` methods.
* (modules/core/02-client) [\#1197](https://github.com/cosmos/ibc-go/pull/1197) Adding `CheckForMisbehaviour` to `ClientState` interface.
* (modules/core/02-client) [\#1195](https://github.com/cosmos/ibc-go/pull/1210) Removing `CheckHeaderAndUpdateState` from `ClientState` interface & associated light client implementations.
* (modules/core/02-client) [\#1189](https://github.com/cosmos/ibc-go/pull/1212) Removing `CheckMisbehaviourAndUpdateState` from `ClientState` interface & associated light client implementations.
* (modules/core/exported) [\#1206](https://github.com/cosmos/ibc-go/pull/1206) Adding new method `UpdateState` to `ClientState` interface.
* (modules/core/02-client) [\#1741](https://github.com/cosmos/ibc-go/pull/1741) Emitting a new `upgrade_chain` event upon setting upgrade consensus state.
* (client) [\#724](https://github.com/cosmos/ibc-go/pull/724) `IsRevisionFormat` and `IsClientIDFormat` have been updated to disallow newlines before the dash used to separate the chainID and revision number, and the client type and client sequence.
* (02-client/cli) [\#897](https://github.com/cosmos/ibc-go/pull/897) Remove `GetClientID()` from `Misbehaviour` interface. Submit client misbehaviour cli command requires an explicit client id now.

### Features

Expand All @@ -94,6 +121,10 @@ Ref: https://keepachangelog.com/en/1.0.0/
* (apps/29-fee) [\#1774](https://github.com/cosmos/ibc-go/pull/1774) Change non nil relayer assertion to non empty to avoid import/export issues for genesis upgrades.
* (makefile) [\#1785](https://github.com/cosmos/ibc-go/pull/1785) Fetch the correct versions of protocol buffers dependencies from tendermint, cosmos-sdk, and ics23.
* (apps/29-fee) [\#1278](https://github.com/cosmos/ibc-go/pull/1278) The URI path for the query to get all incentivized packets for a specific channel did not follow the same format as the rest of queries.
-
* (light-clients/solomachine) [#1839](https://github.com/cosmos/ibc-go/issues/1839) Fixed usage of the new diversifier in validation of changing diversifiers for the solo machine. The current diversifier must sign over the new diversifier.
* (light-clients/07-tendermint) [\#1674](https://github.com/cosmos/ibc-go/pull/1674) Submitted ClientState is zeroed out before checking the proof in order to prevent the proposal from containing information governance is not actually voting on.
* (modules/core/02-client)[\#1676](https://github.com/cosmos/ibc-go/pull/1676) ClientState must be zeroed out for `UpgradeProposals` to pass validation. This prevents a proposal containing information governance is not actually voting on.

## [v3.1.1](https://github.com/cosmos/ibc-go/releases/tag/v3.1.1) - 2022-08-02

Expand Down Expand Up @@ -191,6 +222,7 @@ Ref: https://keepachangelog.com/en/1.0.0/

### Improvements

* (client) [\#888](https://github.com/cosmos/ibc-go/pull/888) Add `GetTimestampAtHeight` to `ClientState`
* (interchain-accounts) [\#1037](https://github.com/cosmos/ibc-go/pull/1037) Add a function `InitModule` to the interchain accounts `AppModule`. This function should be called within the upgrade handler when adding the interchain accounts module to a chain. It should be called in place of InitGenesis (set the consensus version in the version map).
* (testing) [\#942](https://github.com/cosmos/ibc-go/pull/942) `NewTestChain` will create 4 validators in validator set by default. A new constructor function `NewTestChainWithValSet` is provided for test writers who want custom control over the validator set of test chains.
* (testing) [\#904](https://github.com/cosmos/ibc-go/pull/904) Add `ParsePacketFromEvents` function to the testing package. Useful when sending/relaying packets via the testing package.
Expand All @@ -200,9 +232,9 @@ Ref: https://keepachangelog.com/en/1.0.0/
* (channel) [\#692](https://github.com/cosmos/ibc-go/pull/692) Minimize channel logging by only emitting the packet sequence, source port/channel, destination port/channel upon packet receives, acknowledgements and timeouts.
* [\#383](https://github.com/cosmos/ibc-go/pull/383) Adds helper functions for merging and splitting middleware versions from the underlying app version.
* (modules/core/05-port) [\#288](https://github.com/cosmos/ibc-go/issues/288) Making the 05-port keeper function IsBound public. The IsBound function checks if the provided portID is already binded to a module.
* (client) [\#724](https://github.com/cosmos/ibc-go/pull/724) `IsRevisionFormat` and `IsClientIDFormat` have been updated to disallow newlines before the dash used to separate the chainID and revision number, and the client type and client sequence.
* (channel) [\#644](https://github.com/cosmos/ibc-go/pull/644) Adds `GetChannelConnection` to the ChannelKeeper. This function returns the connectionID and connection state associated with a channel.
* (channel) [\647](https://github.com/cosmos/ibc-go/pull/647) Reorganizes channel handshake handling to set channel state after IBC application callbacks.
* (client) [\#724](https://github.com/cosmos/ibc-go/pull/724) `IsRevisionFormat` and `IsClientIDFormat` have been updated to disallow newlines before the dash used to separate the chainID and revision number, and the client type and client sequence.
* (interchain-accounts) [\#1466](https://github.com/cosmos/ibc-go/pull/1466) Emit event when there is an acknowledgement during `OnRecvPacket`.

### Features
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2 changes: 0 additions & 2 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -64,8 +64,6 @@ The Inter-Blockchain Communication protocol (IBC) allows blockchains to talk to

3.2 [ICS 06 Solo Machine](https://github.com/cosmos/ibc-go/tree/main/modules/light-clients/06-solomachine)

Note: The localhost client is currently non-functional.

## Roadmap

For an overview of upcoming changes to ibc-go take a look at the [roadmap](./docs/roadmap/roadmap.md).
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4 changes: 1 addition & 3 deletions docs/OLD_README.md
Original file line number Diff line number Diff line change
Expand Up @@ -28,8 +28,6 @@ For the general specification please refer to the [Interchain Standards](https:/

3.2 [Tendermint Client](./../light-clients/07-tendermint/spec/README.md)

3.3 [Localhost Client](./../light-clients/09-localhost/spec/README.md)

## Implementation Details

As stated above, the IBC implementation on the Cosmos SDK introduces some changes
Expand Down Expand Up @@ -114,4 +112,4 @@ x/ibc
│   └── 09-localhost/
└── testing/
```
<!-- markdown-link-check-enable-->
<!-- markdown-link-check-enable-->
88 changes: 88 additions & 0 deletions docs/architecture/adr-005-consensus-height-events.md
Original file line number Diff line number Diff line change
@@ -0,0 +1,88 @@
# ADR 005: UpdateClient Events - ClientState Consensus Heights

## Changelog
* 25/04/2022: initial draft

## Status

Accepted

## Context

The `ibc-go` implementation leverages the [Cosmos-SDK's EventManager](https://github.com/cosmos/cosmos-sdk/blob/v0.45.4/docs/core/events.md#EventManager) to provide subscribers a method of reacting to application specific events.
Some IBC relayers depend on the [`consensus_height`](https://github.com/cosmos/ibc-go/blob/v3.0.0/modules/core/02-client/keeper/events.go#L33) attribute emitted as part of `UpdateClient` events in order to run `07-tendermint` misbehaviour detection by cross-checking the details of the *Header* emitted at a given consensus height against those of the *Header* from the originating chain. This includes such details as:

- The `SignedHeader` containing the commitment root.
- The `ValidatorSet` that signed the *Header*.
- The `TrustedHeight` seen by the client at less than or equal to the height of *Header*.
- The last `TrustedValidatorSet` at the trusted height.

Following the refactor of the `02-client` submodule and associated `ClientState` interfaces, it will now be possible for
light client implementations to perform such actions as batch updates, inserting `N` number of `ConsensusState`s into the application state tree with a single `UpdateClient` message. This flexibility is provided in `ibc-go` by the usage of the [Protobuf `Any`](https://developers.google.com/protocol-buffers/docs/proto3#any) field contained within the [`UpdateClient`](https://github.com/cosmos/ibc-go/blob/v3.0.0/proto/ibc/core/client/v1/tx.proto#L44) message.
For example, a batched client update message serialized as a Protobuf `Any` type for the `07-tendermint` lightclient implementation could be defined as follows:

```protobuf
message BatchedHeaders {
repeated Header headers = 1;
}
```

To complement this flexibility, the `UpdateClient` handler will now support the submission of [client misbehaviour](https://github.com/cosmos/ibc/tree/master/spec/core/ics-002-client-semantics#misbehaviour) by consolidating the `Header` and `Misbehaviour` interfaces into a single `ClientMessage` interface type:

```go
// ClientMessage is an interface used to update an IBC client.
// The update may be done by a single header, a batch of headers, misbehaviour, or any type which when verified produces
// a change to state of the IBC client
type ClientMessage interface {
proto.Message

ClientType() string
ValidateBasic() error
}
```

To support this functionality the `GetHeight()` method has been omitted from the new `ClientMessage` interface.
Emission of standardised events from the `02-client` submodule now becomes problematic and is two-fold:

1. The `02-client` submodule previously depended upon the `GetHeight()` method of `Header` types in order to [retrieve the updated consensus height](https://github.com/cosmos/ibc-go/blob/v3.0.0/modules/core/02-client/keeper/client.go#L90).
2. Emitting a single `consensus_height` event attribute is not sufficient in the case of a batched client update containing multiple *Headers*.

## Decision

The following decisions have been made in order to provide flexibility to consumers of `UpdateClient` events in a non-breaking fashion:

1. Return a list of updated consensus heights `[]exported.Height` from the new `UpdateState` method of the `ClientState` interface.

```go
// UpdateState updates and stores as necessary any associated information for an IBC client, such as the ClientState and corresponding ConsensusState.
// Upon successful update, a list of consensus heights is returned. It assumes the ClientMessage has already been verified.
UpdateState(sdk.Context, codec.BinaryCodec, sdk.KVStore, ClientMessage) []Height
```

2. Maintain the `consensus_height` event attribute emitted from the `02-client` update handler, but mark as deprecated for future removal. For example, with tendermint lightclients this will simply be `consensusHeights[0]` following a successful update using a single *Header*.

3. Add an additional `consensus_heights` event attribute, containing a comma separated list of updated heights. This provides flexibility for emitting a single consensus height or multiple consensus heights in the example use-case of batched header updates.

## Consequences

### Positive

- Subscribers of IBC core events can act upon `UpdateClient` events containing one or more consensus heights.
- Deprecation of the existing `consensus_height` attribute allows consumers to continue to process `UpdateClient` events as normal, with a path to upgrade to using the `consensus_heights` attribute moving forward.

### Negative

- Consumers of IBC core `UpdateClient` events are forced to make future code changes.

### Neutral

## References

Discussions:
- [#1208](https://github.com/cosmos/ibc-go/pull/1208#discussion_r839691927)

Issues:
- [#594](https://github.com/cosmos/ibc-go/issues/594)

PRs:
- [#1285](https://github.com/cosmos/ibc-go/pull/1285)
2 changes: 1 addition & 1 deletion docs/architecture/adr-027-ibc-wasm.md
Original file line number Diff line number Diff line change
Expand Up @@ -100,7 +100,7 @@ packaged inside a payload which is json serialized and passed to `callContract`
array of bytes returned by the smart contract. This data is deserialized and passed as return argument.

```go
func (c *ClientState) CheckProposedHeaderAndUpdateState(context sdk.Context, marshaler codec.BinaryMarshaler, store sdk.KVStore, header exported.Header) (exported.ClientState, exported.ConsensusState, error) {
func (c *ClientState) CheckProposedHeaderAndUpdateState(context sdk.Context, marshaler codec.BinaryMarshaler, store sdk.KVStore, header exported.ClientMessage) (exported.ClientState, exported.ConsensusState, error) {
// get consensus state corresponding to client state to check if the client is expired
consensusState, err := GetConsensusState(store, marshaler, c.LatestHeight)
if err != nil {
Expand Down
11 changes: 0 additions & 11 deletions docs/ibc/integration.md
Original file line number Diff line number Diff line change
Expand Up @@ -175,17 +175,6 @@ at each height during the `BeginBlock` call. The historical info is required to
past historical info at any given height in order to verify the light client `ConsensusState` during the
connection handhake.
The IBC module also has
[`BeginBlock`](https://github.com/cosmos/ibc-go/blob/main/modules/core/02-client/abci.go) logic as
well. This is optional as it is only required if your application uses the [localhost
client](https://github.com/cosmos/ibc/blob/master/spec/client/ics-009-loopback-client) to connect two
different modules from the same chain.
::: tip
Only register the ibc module to the `SetOrderBeginBlockers` if your application will use the
localhost (_aka_ loopback) client.
:::
```go
// app.go
func NewApp(...args) *App {
Expand Down
20 changes: 20 additions & 0 deletions docs/ibc/middleware/develop.md
Original file line number Diff line number Diff line change
Expand Up @@ -408,6 +408,26 @@ func GetAppVersion(

return metadata.AppVersion, true
}

// middleware must return the underlying application version
func GetAppVersion(ctx sdk.Context, portID, channelID string) (string, bool) {
version, found := ics4Keeper.GetAppVersion(ctx, portID, channelID)
if !found {
return "", false
}

if !MiddlewareEnabled {
return version, true
}

// unwrap channel version
metadata, err := Unmarshal(version)
if err != nil {
panic(fmt.Errof("unable to unmarshal version: %w", err))
}

return metadata.AppVersion, true
}
```
See [here](https://github.com/cosmos/ibc-go/blob/48a6ae512b4ea42c29fdf6c6f5363f50645591a2/modules/apps/29-fee/ibc_middleware.go#L355-L358) an example implementation of this function for the ICS29 Fee Middleware module.
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