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// Copyright 2020 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 (
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
)
// ReadPreimage retrieves a single preimage of the provided hash.
func ReadPreimage(db ethdb.KeyValueReader, hash common.Hash) []byte {
data, _ := db.Get(preimageKey(hash))
return data
}
// WritePreimages writes the provided set of preimages to the database.
func WritePreimages(db ethdb.KeyValueWriter, preimages map[common.Hash][]byte) {
for hash, preimage := range preimages {
if err := db.Put(preimageKey(hash), preimage); err != nil {
log.Crit("Failed to store trie preimage", "err", err)
}
}
preimageCounter.Inc(int64(len(preimages)))
preimageHitCounter.Inc(int64(len(preimages)))
}
// ReadCode retrieves the contract code of the provided code hash.
func ReadCode(db ethdb.KeyValueReader, hash common.Hash) []byte {
// Try with the legacy code scheme first, if not then try with current
// scheme. Since most of the code will be found with legacy scheme.
//
// todo(rjl493456442) change the order when we forcibly upgrade the code
// scheme with snapshot.
data, _ := db.Get(hash[:])
if len(data) != 0 {
return data
}
return ReadCodeWithPrefix(db, hash)
}
// ReadCodeWithPrefix retrieves the contract code of the provided code hash.
// The main difference between this function and ReadCode is this function
// will only check the existence with latest scheme(with prefix).
func ReadCodeWithPrefix(db ethdb.KeyValueReader, hash common.Hash) []byte {
data, _ := db.Get(codeKey(hash))
return data
}
// WriteCode writes the provided contract code database.
func WriteCode(db ethdb.KeyValueWriter, hash common.Hash, code []byte) {
if err := db.Put(codeKey(hash), code); err != nil {
log.Crit("Failed to store contract code", "err", err)
}
}
// DeleteCode deletes the specified contract code from the database.
func DeleteCode(db ethdb.KeyValueWriter, hash common.Hash) {
if err := db.Delete(codeKey(hash)); err != nil {
log.Crit("Failed to delete contract code", "err", err)
}
}
// ReadTrieNode retrieves the trie node of the provided hash.
func ReadTrieNode(db ethdb.KeyValueReader, hash common.Hash) []byte {
data, _ := db.Get(hash.Bytes())
return data
}
// WriteTrieNode writes the provided trie node database.
func WriteTrieNode(db ethdb.KeyValueWriter, hash common.Hash, node []byte) {
if err := db.Put(hash.Bytes(), node); err != nil {
log.Crit("Failed to store trie node", "err", err)
}
}
// DeleteTrieNode deletes the specified trie node from the database.
func DeleteTrieNode(db ethdb.KeyValueWriter, hash common.Hash) {
if err := db.Delete(hash.Bytes()); err != nil {
log.Crit("Failed to delete trie node", "err", err)
}
}
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