## 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`.
---
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