## Description
Ref: #12398
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## Description
Closes: #9362
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---
### 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/master/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/master/docs/building-modules)
- [X] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/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)
* Add 1st version of migrate
* Put migration logic into Configurator
* add test to bank store migration
* add test for configurator
* Error if no migration found
* Remove RunMigrations from Configurator interface
* Update spec
* Rename folders
* copy-paste from keys.go
* Fix nil map
* rename function
* Update simapp/app.go
Co-authored-by: Robert Zaremba <robert@zaremba.ch>
* Update simapp/app_test.go
Co-authored-by: Robert Zaremba <robert@zaremba.ch>
* Adderss reviews
* Fix tests
* Update testutil/context.go
Co-authored-by: Robert Zaremba <robert@zaremba.ch>
* Update docs for ConsensusVersion
* Rename to forVersion
* Fix tests
* Check error early
* Return 1 for intiial version
* Use MigrationKeeper
* Fix test
* Revert adding marshaler to Configurator
* Godoc updates
* Update docs
Co-authored-by: Robert Zaremba <robert@zaremba.ch>
Co-authored-by: Aaron Craelius <aaron@regen.network>
Facundo Medica
Ivan Verchenko
Amaury