module.go

package minter

import (
	"context"
	"encoding/json"
	"fmt"
	"math/rand"

	"github.com/MinterTeam/mhub/chain/x/minter/keeper"
	"github.com/gorilla/mux"
	"github.com/grpc-ecosystem/grpc-gateway/runtime"
	"github.com/spf13/cobra"

	"github.com/MinterTeam/mhub/chain/x/minter/client/cli"
	"github.com/MinterTeam/mhub/chain/x/minter/client/rest"
	"github.com/MinterTeam/mhub/chain/x/minter/types"
	"github.com/cosmos/cosmos-sdk/codec"
	codectypes "github.com/cosmos/cosmos-sdk/codec/types"
	"github.com/cosmos/cosmos-sdk/types/module"
	simtypes "github.com/cosmos/cosmos-sdk/types/simulation"
	bankkeeper "github.com/cosmos/cosmos-sdk/x/bank/keeper"

	// "github.com/cosmos/cosmos-sdk/x/gov/simulation"

	"github.com/cosmos/cosmos-sdk/client"
	sdk "github.com/cosmos/cosmos-sdk/types"
	abci "github.com/tendermint/tendermint/abci/types"
)

// type check to ensure the interface is properly implemented
var (
	_ module.AppModule      = AppModule{}
	_ module.AppModuleBasic = AppModuleBasic{}
)

// AppModuleBasic object for module implementation
type AppModuleBasic struct{}

// Name implements app module basic
func (AppModuleBasic) Name() string {
	return types.ModuleName
}

// RegisterLegacyAminoCodec implements app module basic
func (AppModuleBasic) RegisterLegacyAminoCodec(cdc *codec.LegacyAmino) {
	types.RegisterCodec(cdc)
}

// DefaultGenesis implements app module basic
func (AppModuleBasic) DefaultGenesis(cdc codec.JSONMarshaler) json.RawMessage {
	return cdc.MustMarshalJSON(types.DefaultGenesisState())
}

// ValidateGenesis implements app module basic
func (AppModuleBasic) ValidateGenesis(cdc codec.JSONMarshaler, _ client.TxEncodingConfig, bz json.RawMessage) error {
	var data types.GenesisState
	if err := cdc.UnmarshalJSON(bz, &data); err != nil {
		return fmt.Errorf("failed to unmarshal %s genesis state: %w", types.ModuleName, err)
	}

	return data.ValidateBasic()
}

// RegisterRESTRoutes implements app module basic
func (AppModuleBasic) RegisterRESTRoutes(ctx client.Context, rtr *mux.Router) {
	rest.RegisterRoutes(ctx, rtr, types.StoreKey)
}

// GetQueryCmd implements app module basic
func (AppModuleBasic) GetQueryCmd() *cobra.Command {
	return cli.GetQueryCmd(types.StoreKey)
}

// GetTxCmd implements app module basic
func (AppModuleBasic) GetTxCmd() *cobra.Command {
	return cli.GetTxCmd(types.StoreKey)
}

// RegisterGRPCGatewayRoutes registers the gRPC Gateway routes for the distribution module.
// also implements app modeul basic
func (AppModuleBasic) RegisterGRPCGatewayRoutes(clientCtx client.Context, mux *runtime.ServeMux) {
	// TODO: implement GRPC query routes
	types.RegisterQueryHandlerClient(context.Background(), mux, types.NewQueryClient(clientCtx))
}

// RegisterInterfaces implements app bmodule basic
func (b AppModuleBasic) RegisterInterfaces(registry codectypes.InterfaceRegistry) {
	types.RegisterInterfaces(registry)
}

//____________________________________________________________________________

// AppModule object for module implementation
type AppModule struct {
	AppModuleBasic
	keeper     keeper.Keeper
	bankKeeper bankkeeper.Keeper
}

// NewAppModule creates a new AppModule Object
func NewAppModule(k keeper.Keeper, bankKeeper bankkeeper.Keeper) AppModule {
	return AppModule{
		AppModuleBasic: AppModuleBasic{},
		keeper:         k,
		bankKeeper:     bankKeeper,
	}
}

// Name implements app module
func (AppModule) Name() string {
	return types.ModuleName
}

// RegisterInvariants implements app module
func (am AppModule) RegisterInvariants(ir sdk.InvariantRegistry) {
	// TODO: make some invariants in the peggy module to ensure that
	// coins aren't being fraudlently minted etc...
}

// Route implements app module
func (am AppModule) Route() sdk.Route {
	return sdk.NewRoute(types.RouterKey, NewHandler(am.keeper))
}

// QuerierRoute implements app module
func (am AppModule) QuerierRoute() string {
	return types.QuerierRoute
}

// LegacyQuerierHandler returns the distribution module sdk.Querier.
func (am AppModule) LegacyQuerierHandler(legacyQuerierCdc *codec.LegacyAmino) sdk.Querier {
	return keeper.NewQuerier(am.keeper)
}

// RegisterServices registers module services.
func (am AppModule) RegisterServices(cfg module.Configurator) {
	types.RegisterMsgServer(cfg.MsgServer(), keeper.NewMsgServerImpl(am.keeper))
	types.RegisterQueryServer(cfg.QueryServer(), am.keeper)
}

// InitGenesis initializes the genesis state for this module and implements app module.
func (am AppModule) InitGenesis(ctx sdk.Context, cdc codec.JSONMarshaler, data json.RawMessage) []abci.ValidatorUpdate {
	var genesisState types.GenesisState
	cdc.MustUnmarshalJSON(data, &genesisState)
	keeper.InitGenesis(ctx, am.keeper, genesisState)
	return []abci.ValidatorUpdate{}
}

// ExportGenesis exports the current genesis state to a json.RawMessage
func (am AppModule) ExportGenesis(ctx sdk.Context, cdc codec.JSONMarshaler) json.RawMessage {
	gs := keeper.ExportGenesis(ctx, am.keeper)
	return cdc.MustMarshalJSON(&gs)
}

// BeginBlock implements app module
func (am AppModule) BeginBlock(_ sdk.Context, _ abci.RequestBeginBlock) {}

// EndBlock implements app module
func (am AppModule) EndBlock(ctx sdk.Context, _ abci.RequestEndBlock) []abci.ValidatorUpdate {

	hasPendingValset := false
	am.keeper.IterateValsetRequest(ctx, func(_ []byte, _ *types.Valset) bool {
		hasPendingValset = true
		return true
	})

	if !hasPendingValset {
		lastValset := am.keeper.GetLastValset(ctx)
		if lastValset == nil || types.BridgeValidators(am.keeper.GetCurrentValset(ctx).Members).PowerDiff(lastValset.Members) > 0.01 {
			am.keeper.SetValsetRequest(ctx)
		}
	}

	return []abci.ValidatorUpdate{}
}

//____________________________________________________________________________

// AppModuleSimulation functions

// GenerateGenesisState creates a randomized GenState of the distribution module.
func (AppModule) GenerateGenesisState(simState *module.SimulationState) {
	// TODO: implement peggy simulation stuffs
	// simulation.RandomizedGenState(simState)
}

// ProposalContents returns all the distribution content functions used to
// simulate governance proposals.
func (am AppModule) ProposalContents(simState module.SimulationState) []simtypes.WeightedProposalContent {
	// TODO: implement peggy simulation stuffs
	return nil
}

// RandomizedParams creates randomized distribution param changes for the simulator.
func (AppModule) RandomizedParams(r *rand.Rand) []simtypes.ParamChange {
	// TODO: implement peggy simulation stuffs
	return nil
}

// RegisterStoreDecoder registers a decoder for distribution module's types
func (am AppModule) RegisterStoreDecoder(sdr sdk.StoreDecoderRegistry) {
	// TODO: implement peggy simulation stuffs
	// sdr[types.StoreKey] = simulation.NewDecodeStore(am.cdc)
}

// WeightedOperations returns the all the gov module operations with their respective weights.
func (am AppModule) WeightedOperations(simState module.SimulationState) []simtypes.WeightedOperation {
	// TODO: implement peggy simulation stuffs
	// return simulation.WeightedOperations(
	// simState.AppParams, simState.Cdc, am.accountKeeper, am.bankKeeper, am.keeper, am.stakingKeeper,
	// )
	return nil
}