Cosmos SDK: Modular blockchain development framework

package main

import (
	"github.com/cosmos/cosmos-sdk/baseapp"
	"github.com/cosmos/cosmos-sdk/client"
	"github.com/cosmos/cosmos-sdk/codec"
	"github.com/cosmos/cosmos-sdk/codec/types"
	"github.com/cosmos/cosmos-sdk/server"
	"github.com/cosmos/cosmos-sdk/simapp"
	"github.com/cosmos/cosmos-sdk/types/module"
	"github.com/cosmos/cosmos-sdk/x/auth"
	"github.com/cosmos/cosmos-sdk/x/bank"
	"github.com/cosmos/cosmos-sdk/x/staking"
	dbm "github.com/tendermint/tm-db"
)

type App struct {
	*baseapp.BaseApp
	cdc               *codec.LegacyAmino
	appCodec          codec.Codec
	interfaceRegistry types.InterfaceRegistry

	// Module managers
	mm *module.Manager

	// Module keepers
	AccountKeeper auth.AccountKeeper
	BankKeeper    bank.Keeper
	StakingKeeper staking.Keeper
}

func NewApp(logger log.Logger, db dbm.DB) *App {
	appCodec := simapp.MakeTestEncodingConfig().Marshaler
	legacyAmino := simapp.MakeTestEncodingConfig().Amino
	interfaceRegistry := simapp.MakeTestEncodingConfig().InterfaceRegistry

	bApp := baseapp.NewBaseApp("myapp", logger, db, nil)

	app := &App{
		BaseApp:           bApp,
		cdc:               legacyAmino,
		appCodec:          appCodec,
		interfaceRegistry: interfaceRegistry,
	}

	return app
}