erigon-pulse/core/rawdb/accessors_metadata.go
Alex Sharov b6ea28ea80
kv.Del() remove second parameter (#4832)
* save

* save

* save

* save

* save

* save

* save
2022-07-26 12:47:05 +07:00

64 lines
2.0 KiB
Go

// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum 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 go-ethereum 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package rawdb
import (
"encoding/json"
"fmt"
"github.com/ledgerwatch/erigon-lib/kv"
"github.com/ledgerwatch/erigon/common"
"github.com/ledgerwatch/erigon/params"
)
// ReadChainConfig retrieves the consensus settings based on the given genesis hash.
func ReadChainConfig(db kv.Getter, hash common.Hash) (*params.ChainConfig, error) {
data, err := db.GetOne(kv.ConfigTable, hash[:])
if err != nil {
return nil, err
}
if len(data) == 0 {
return nil, nil
}
var config params.ChainConfig
if err := json.Unmarshal(data, &config); err != nil {
return nil, fmt.Errorf("invalid chain config JSON: %x, %w", hash, err)
}
return &config, nil
}
// WriteChainConfig writes the chain config settings to the database.
func WriteChainConfig(db kv.Putter, hash common.Hash, cfg *params.ChainConfig) error {
if cfg == nil {
return nil
}
data, err := json.Marshal(cfg)
if err != nil {
return fmt.Errorf("failed to JSON encode chain config: %w", err)
}
if err := db.Put(kv.ConfigTable, hash[:], data); err != nil {
return fmt.Errorf("failed to store chain config: %w", err)
}
return nil
}
// DeleteChainConfig retrieves the consensus settings based on the given genesis hash.
func DeleteChainConfig(db kv.Deleter, hash common.Hash) error {
return db.Delete(kv.ConfigTable, hash[:])
}