export.go

package symapp

import (
	"encoding/json"
	"log"

	cmtproto "github.com/cometbft/cometbft/api/cometbft/types/v1"

	storetypes "cosmossdk.io/store/types"
	slashingtypes "cosmossdk.io/x/symSlash/types"
	staking "cosmossdk.io/x/symStaking"
	stakingtypes "cosmossdk.io/x/symStaking/types"

	servertypes "github.com/cosmos/cosmos-sdk/server/types"
	sdk "github.com/cosmos/cosmos-sdk/types"
)

// ExportAppStateAndValidators exports the state of the application for a genesis
// file.
func (app *SymApp) ExportAppStateAndValidators(forZeroHeight bool, jailAllowedAddrs, modulesToExport []string) (servertypes.ExportedApp, error) {
	// as if they could withdraw from the start of the next block
	ctx := app.NewContextLegacy(true, cmtproto.Header{Height: app.LastBlockHeight()})

	// We export at last height + 1, because that's the height at which
	// CometBFT will start InitChain.
	height := app.LastBlockHeight() + 1
	if forZeroHeight {
		height = 0
		app.prepForZeroHeightGenesis(ctx, jailAllowedAddrs)
	}

	genState, err := app.ModuleManager.ExportGenesisForModules(ctx, modulesToExport)
	if err != nil {
		return servertypes.ExportedApp{}, err
	}

	appState, err := json.MarshalIndent(genState, "", "  ")
	if err != nil {
		return servertypes.ExportedApp{}, err
	}

	validators, err := staking.WriteValidators(ctx, app.StakingKeeper)
	return servertypes.ExportedApp{
		AppState:        appState,
		Validators:      validators,
		Height:          height,
		ConsensusParams: app.BaseApp.GetConsensusParams(ctx),
	}, err
}

// prepare for fresh start at zero height
// NOTE zero height genesis is a temporary feature which will be deprecated
//
//	in favor of export at a block height
func (app *SymApp) prepForZeroHeightGenesis(ctx sdk.Context, jailAllowedAddrs []string) {
	applyAllowedAddrs := false

	// check if there is a allowed address list
	if len(jailAllowedAddrs) > 0 {
		applyAllowedAddrs = true
	}

	allowedAddrsMap := make(map[string]bool)

	for _, addr := range jailAllowedAddrs {
		_, err := sdk.ValAddressFromBech32(addr)
		if err != nil {
			log.Fatal(err)
		}
		allowedAddrsMap[addr] = true
	}

	/* Handle fee distribution state. */

	// set context height to zero
	height := ctx.BlockHeight()
	ctx = ctx.WithBlockHeight(0)

	// reset context height
	ctx = ctx.WithBlockHeight(height)

	// Iterate through validators by power descending, reset bond heights, and
	// update bond intra-tx counters.
	store := ctx.KVStore(app.GetKey(stakingtypes.StoreKey))
	iter := storetypes.KVStoreReversePrefixIterator(store, stakingtypes.ValidatorsKey)
	counter := int16(0)

	for ; iter.Valid(); iter.Next() {
		addr := sdk.ValAddress(stakingtypes.AddressFromValidatorsKey(iter.Key()))
		validator, err := app.StakingKeeper.GetValidator(ctx, addr)
		if err != nil {
			panic("expected validator, not found")
		}

		validator.UnbondingHeight = 0
		if applyAllowedAddrs && !allowedAddrsMap[addr.String()] {
			validator.Jailed = true
		}

		if err = app.StakingKeeper.SetValidator(ctx, validator); err != nil {
			panic(err)
		}
		counter++
	}

	if err := iter.Close(); err != nil {
		app.Logger().Error("error while closing the key-value store reverse prefix iterator: ", err)
		return
	}

	_, err := app.StakingKeeper.ApplyAndReturnValidatorSetUpdates(ctx)
	if err != nil {
		log.Fatal(err)
	}

	/* Handle slashing state. */

	// reset start height on signing infos
	err = app.SlashingKeeper.ValidatorSigningInfo.Walk(ctx, nil, func(addr sdk.ConsAddress, info slashingtypes.ValidatorSigningInfo) (stop bool, err error) {
		info.StartHeight = 0
		err = app.SlashingKeeper.ValidatorSigningInfo.Set(ctx, addr, info)
		if err != nil {
			return true, err
		}
		return false, nil
	})
	if err != nil {
		panic(err)
	}
}