cosmos-sdk/x/auth/middleware/expected_keepers.go

package middleware

import (
	sdk "github.com/cosmos/cosmos-sdk/types"
	"github.com/cosmos/cosmos-sdk/x/auth/types"
)

// AccountKeeper defines the contract needed for AccountKeeper related APIs.
// Interface provides support to use non-sdk AccountKeeper for TxHandler's middlewares.
type AccountKeeper interface {
	GetParams(ctx sdk.Context) (params types.Params)
	GetAccount(ctx sdk.Context, addr sdk.AccAddress) types.AccountI
	SetAccount(ctx sdk.Context, acc types.AccountI)
	GetModuleAddress(moduleName string) sdk.AccAddress
}

// FeegrantKeeper defines the expected feegrant keeper.
type FeegrantKeeper interface {
	UseGrantedFees(ctx sdk.Context, granter, grantee sdk.AccAddress, fee sdk.Coins, msgs []sdk.Msg) error
}