revert: min commission rate check on create validator (#11)

This reverts commit c3212d3.

x/staking/keeper/msg_server.go

@@ -74,11 +74,6 @@ func (k msgServer) CreateValidator(goCtx context.Context, msg *types.MsgCreateVa
 	if err != nil {
 		return nil, err
 	}
-
-	if msg.Commission.Rate.LT(k.MinCommissionRate(ctx)) {
-		return nil, sdkerrors.Wrapf(types.ErrCommissionLTMinRate, "cannot set validator commission to less than minimum rate of %s", k.MinCommissionRate(ctx))
-	}
-
 	commission := types.NewCommissionWithTime(
 		msg.Commission.Rate, msg.Commission.MaxRate,
 		msg.Commission.MaxChangeRate, ctx.BlockHeader().Time,

x/staking/keeper/validator.go

@@ -148,23 +148,6 @@ func (k Keeper) UpdateValidatorCommission(ctx sdk.Context,
 	return commission, nil
 }
 
-// MustUpdateValidatorCommission updates a validator's commission rate,
-// ignoring the max change rate.
-func (k Keeper) MustUpdateValidatorCommission(ctx sdk.Context,
-	validator types.Validator, newRate sdk.Dec) (types.Commission, error) {
-	commission := validator.Commission
-	blockTime := ctx.BlockHeader().Time
-
-	if newRate.LT(k.MinCommissionRate(ctx)) {
-		return commission, fmt.Errorf("cannot set validator commission to less than minimum rate of %s", k.MinCommissionRate(ctx))
-	}
-
-	commission.Rate = newRate
-	commission.UpdateTime = blockTime
-
-	return commission, nil
-}
-
 // remove the validator record and associated indexes
 // except for the bonded validator index which is only handled in ApplyAndReturnTendermintUpdates
 // TODO, this function panics, and it's not good.

x/staking/types/errors.go

@@ -49,5 +49,4 @@ var (
 	ErrInvalidHistoricalInfo           = sdkerrors.Register(ModuleName, 37, "invalid historical info")
 	ErrNoHistoricalInfo                = sdkerrors.Register(ModuleName, 38, "no historical info found")
 	ErrEmptyValidatorPubKey            = sdkerrors.Register(ModuleName, 39, "empty validator public key")
-	ErrCommissionLTMinRate             = sdkerrors.Register(ModuleName, 40, "commission cannot be less than min rate")
 )