mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
synced 2024-12-26 05:27:19 +00:00
60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// Copyright 2018 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rawdb
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import (
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"encoding/json"
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"fmt"
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"github.com/ledgerwatch/erigon/common/dbutils"
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"github.com/ledgerwatch/erigon/ethdb"
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"github.com/ledgerwatch/erigon/common"
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"github.com/ledgerwatch/erigon/params"
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)
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// ReadChainConfig retrieves the consensus settings based on the given genesis hash.
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func ReadChainConfig(db ethdb.KVGetter, hash common.Hash) (*params.ChainConfig, error) {
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data, err := db.GetOne(dbutils.ConfigPrefix, hash[:])
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if err != nil {
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return nil, err
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}
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if len(data) == 0 {
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return nil, nil
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}
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var config params.ChainConfig
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if err := json.Unmarshal(data, &config); err != nil {
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return nil, fmt.Errorf("invalid chain config JSON: %x, %w", hash, err)
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}
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return &config, nil
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}
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// WriteChainConfig writes the chain config settings to the database.
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func WriteChainConfig(db ethdb.Putter, hash common.Hash, cfg *params.ChainConfig) error {
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if cfg == nil {
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return nil
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}
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data, err := json.Marshal(cfg)
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if err != nil {
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return fmt.Errorf("failed to JSON encode chain config: %w", err)
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}
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if err := db.Put(dbutils.ConfigPrefix, hash[:], data); err != nil {
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return fmt.Errorf("failed to store chain config: %w", err)
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}
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return nil
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}
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