// Copyright 2024 The Erigon Authors
// This file is part of Erigon.
//
// Erigon 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.
//
// Erigon 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 Erigon. If not, see <http://www.gnu.org/licenses/>.

package builder

import (
	"slices"

	"github.com/erigontech/erigon/common/log/v3"
	"github.com/erigontech/erigon/execution/protocol/rules"
	"github.com/erigontech/erigon/execution/types"
	"github.com/erigontech/erigon/execution/types/accounts"
)

// IsLocalBlock checks whether the specified block is mined
// by local miner accounts.
//
// We regard two types of accounts as local miner account: etherbase
// and accounts specified via `txpool.locals` flag.
func IsLocalBlock(engine rules.Engine, etherbase accounts.Address, txPoolLocals []accounts.Address, header *types.Header) bool {
	author, err := engine.Author(header)
	if err != nil {
		log.Warn("Failed to retrieve block author", "number", header.Number, "header_hash", header.Hash(), "err", err)
		return false
	}
	// Check whether the given address is etherbase.
	if author == etherbase {
		return true
	}
	// Check whether the given address is specified by `txpool.local`
	// CLI flag.
	return slices.Contains(txPoolLocals, author)
}
