// Copyright 2021 Evmos Foundation
// This file is part of Evmos' Ethermint library.
//
// The Ethermint library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The Ethermint library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the Ethermint library. If not, see https://github.com/evmos/ethermint/blob/main/LICENSE
package keeper

import (
	abci "github.com/tendermint/tendermint/abci/types"

	sdk "github.com/cosmos/cosmos-sdk/types"

	ethtypes "github.com/ethereum/go-ethereum/core/types"
)

// BeginBlock sets the sdk Context and EIP155 chain id to the Keeper.
func (k *Keeper) BeginBlock(ctx sdk.Context, req abci.RequestBeginBlock) {
	k.WithChainID(ctx)
}

// EndBlock also retrieves the bloom filter value from the transient store and commits it to the
// KVStore. The EVM end block logic doesn't update the validator set, thus it returns
// an empty slice.
func (k *Keeper) EndBlock(ctx sdk.Context, req abci.RequestEndBlock) []abci.ValidatorUpdate {
	// Gas costs are handled within msg handler so costs should be ignored
	infCtx := ctx.WithGasMeter(sdk.NewInfiniteGasMeter())

	bloom := ethtypes.BytesToBloom(k.GetBlockBloomTransient(infCtx).Bytes())
	k.EmitBlockBloomEvent(infCtx, bloom)

	return []abci.ValidatorUpdate{}
}