From 7875835c39da1d6579de84a348b2a0c0c2c31a1f Mon Sep 17 00:00:00 2001
From: "mergify[bot]" <37929162+mergify[bot]@users.noreply.github.com>
Date: Mon, 21 Feb 2022 15:54:20 +0100
Subject: [PATCH] feat: Allow to restrict MintCoins from app.go (backport
 #10771) (#11228)

* feat: Allow to restrict MintCoins from app.go (#10771)

## Description

Closes: https://github.com/cosmos/cosmos-sdk/issues/10386

This PR adds feature to the bank module so that other modules using bankKeeper would be able to call the keeper with restricted permissions when minting coins. `WithMintCoinsRestriction` would be able to get called within app.go when setting keeper components for each individual keeper, taking a function that would validate minting denom as an argument.

The example below demonstrates adding bank module with restricted permissions.
```
	app.DistrKeeper = distrkeeper.NewKeeper(
		appCodec, keys[distrtypes.StoreKey], app.GetSubspace(distrtypes.ModuleName), app.AccountKeeper, app.BankKeeper.WithMintCoinsRestriction(DistributionMintingRestriction),
		&stakingKeeper, authtypes.FeeCollectorName, app.ModuleAccountAddrs(),
	)
```
while there would be a seperate function that would restrict and validate allowed denoms as such.

```

func DistributionMintingRestriction(ctx sdk.Context, coins sdk.Coins) errors {
  for _, coin := range coins {
    if coin.Denom != ctx.NativeStakingDenom {
       return errors.New(fmt.Sprintf("Distribution can only print denom %s, tried minting %s", ctx.NativeStakingDenom, coin.Denom))
     }
  }
}
```

The sdk's simapp currently does not have any keepers that are to be changed with this implementation added, thus remaining unchanged in `app.go`.

---

### Author Checklist

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I have...

- [ ] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
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- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/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

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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
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- [ ] manually tested (if applicable)

(cherry picked from commit ea676599504aad3801e5103ccfcc4f493a1cfbe1)

# Conflicts:
#	CHANGELOG.md
#	x/bank/keeper/keeper.go

* fix conflicts

* fix conflicts

* revert storetypes

* Update x/bank/keeper/keeper.go

Co-authored-by: Amaury <1293565+amaurym@users.noreply.github.com>

* Update CHANGELOG.md

* Update CHANGELOG.md

* Update x/bank/spec/02_keepers.md

* fix tests

Co-authored-by: Matt, Park <45252226+mattverse@users.noreply.github.com>
Co-authored-by: marbar3778 <marbar3778@yahoo.com>
Co-authored-by: Amaury <1293565+amaurym@users.noreply.github.com>