Move some Param types from Keeper to Types in staking

CHANGELOG.md

@@ -63,6 +63,7 @@ older clients.
 
 ### API Breaking Changes
 
+* (x/staking) [\#6451](https://github.com/cosmos/cosmos-sdk/pull/6451) `DefaultParamspace` and `ParamKeyTable` in staking module are moved from keeper to types to enforce consistency.
 * [\#6409](https://github.com/cosmos/cosmos-sdk/pull/6409) Rename all IsEmpty methods to Empty across the codebase and enforce consistency.
 * [\#6231](https://github.com/cosmos/cosmos-sdk/pull/6231) Simplify `AppModule` interface, `Route` and `NewHandler` methods become only `Route`
 and returns a new `Route` type.

simapp/app.go

@@ -204,7 +204,7 @@ func NewSimApp(
 	app.ParamsKeeper = paramskeeper.NewKeeper(appCodec, keys[paramstypes.StoreKey], tkeys[paramstypes.TStoreKey])
 	app.subspaces[auth.ModuleName] = app.ParamsKeeper.Subspace(auth.DefaultParamspace)
 	app.subspaces[banktypes.ModuleName] = app.ParamsKeeper.Subspace(banktypes.DefaultParamspace)
-	app.subspaces[stakingtypes.ModuleName] = app.ParamsKeeper.Subspace(stakingkeeper.DefaultParamspace)
+	app.subspaces[stakingtypes.ModuleName] = app.ParamsKeeper.Subspace(stakingtypes.DefaultParamspace)
 	app.subspaces[minttypes.ModuleName] = app.ParamsKeeper.Subspace(minttypes.DefaultParamspace)
 	app.subspaces[distrtypes.ModuleName] = app.ParamsKeeper.Subspace(distrtypes.DefaultParamspace)
 	app.subspaces[slashingtypes.ModuleName] = app.ParamsKeeper.Subspace(slashingtypes.DefaultParamspace)

x/staking/keeper/keeper.go

@@ -39,7 +39,7 @@ func NewKeeper(
 ) Keeper {
 	// set KeyTable if it has not already been set
 	if !ps.HasKeyTable() {
-		ps = ps.WithKeyTable(ParamKeyTable())
+		ps = ps.WithKeyTable(types.ParamKeyTable())
 	}
 
 	// ensure bonded and not bonded module accounts are set

x/staking/keeper/params.go

@@ -4,20 +4,9 @@ import (
 	"time"
 
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	paramtypes "github.com/cosmos/cosmos-sdk/x/params/types"
 	"github.com/cosmos/cosmos-sdk/x/staking/types"
 )
 
-// Default parameter namespace
-const (
-	DefaultParamspace = types.ModuleName
-)
-
-// ParamTable for staking module
-func ParamKeyTable() paramtypes.KeyTable {
-	return paramtypes.NewKeyTable().RegisterParamSet(&types.Params{})
-}
-
 // UnbondingTime
 func (k Keeper) UnbondingTime(ctx sdk.Context) (res time.Duration) {
 	k.paramstore.Get(ctx, types.KeyUnbondingTime, &res)

x/staking/types/params.go

@@ -15,6 +15,9 @@ import (
 
 // Staking params default values
 const (
+	// Default parameter namespace
+	DefaultParamspace = ModuleName
+
 	// DefaultUnbondingTime reflects three weeks in seconds as the default
 	// unbonding time.
 	// TODO: Justify our choice of default here.
@@ -42,6 +45,11 @@ var (
 
 var _ paramtypes.ParamSet = (*Params)(nil)
 
+// ParamTable for staking module
+func ParamKeyTable() paramtypes.KeyTable {
+	return paramtypes.NewKeyTable().RegisterParamSet(&Params{})
+}
+
 // NewParams creates a new Params instance
 func NewParams(unbondingTime time.Duration, maxValidators, maxEntries, historicalEntries uint32, bondDenom string) Params {
 	return Params{