Roy Crihfield
761d60acdf
The Geth `core/state` and `trie` packages underwent a big refactor between `v1.11.6` and `1.13.14`. This code, which was adapted from those, needed corresponding updates. To do this I applied the diff patches from Geth directly where possible and in some places had to clone new parts of the Geth code and adapt them. In order to make this process as straightforward as possible in the future, I've attempted to minimize the number of changes vs. Geth and added some documentation in the `trie_by_cid` package. Reviewed-on: #5
96 lines
3.0 KiB
Go
96 lines
3.0 KiB
Go
// Copyright 2022 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 triedb
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import (
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"sync"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/ethdb"
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)
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// preimageStore is the store for caching preimages of node key.
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type preimageStore struct {
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lock sync.RWMutex
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disk ethdb.KeyValueStore
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preimages map[common.Hash][]byte // Preimages of nodes from the secure trie
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preimagesSize common.StorageSize // Storage size of the preimages cache
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}
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// newPreimageStore initializes the store for caching preimages.
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func newPreimageStore(disk ethdb.KeyValueStore) *preimageStore {
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return &preimageStore{
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disk: disk,
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preimages: make(map[common.Hash][]byte),
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}
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}
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// insertPreimage writes a new trie node pre-image to the memory database if it's
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// yet unknown. The method will NOT make a copy of the slice, only use if the
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// preimage will NOT be changed later on.
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func (store *preimageStore) insertPreimage(preimages map[common.Hash][]byte) {
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store.lock.Lock()
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defer store.lock.Unlock()
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for hash, preimage := range preimages {
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if _, ok := store.preimages[hash]; ok {
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continue
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}
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store.preimages[hash] = preimage
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store.preimagesSize += common.StorageSize(common.HashLength + len(preimage))
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}
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}
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// preimage retrieves a cached trie node pre-image from memory. If it cannot be
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// found cached, the method queries the persistent database for the content.
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func (store *preimageStore) preimage(hash common.Hash) []byte {
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store.lock.RLock()
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preimage := store.preimages[hash]
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store.lock.RUnlock()
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if preimage != nil {
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return preimage
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}
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return rawdb.ReadPreimage(store.disk, hash)
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}
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// commit flushes the cached preimages into the disk.
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func (store *preimageStore) commit(force bool) error {
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store.lock.Lock()
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defer store.lock.Unlock()
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if store.preimagesSize <= 4*1024*1024 && !force {
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return nil
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}
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batch := store.disk.NewBatch()
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rawdb.WritePreimages(batch, store.preimages)
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if err := batch.Write(); err != nil {
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return err
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}
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store.preimages, store.preimagesSize = make(map[common.Hash][]byte), 0
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return nil
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}
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// size returns the current storage size of accumulated preimages.
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func (store *preimageStore) size() common.StorageSize {
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store.lock.RLock()
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defer store.lock.RUnlock()
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return store.preimagesSize
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}
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