95 lines
3.2 KiB
Go
95 lines
3.2 KiB
Go
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// 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 trie
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import (
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"fmt"
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"github.com/ethereum/go-ethereum/common"
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)
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// memoryNode is all the information we know about a single cached trie node
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// in the memory.
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type memoryNode struct {
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hash common.Hash // Node hash, computed by hashing rlp value
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size uint16 // Byte size of the useful cached data
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node node // Cached collapsed trie node, or raw rlp data
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}
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// NodeSet contains all dirty nodes collected during the commit operation.
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// Each node is keyed by path. It's not thread-safe to use.
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type NodeSet struct {
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owner common.Hash // the identifier of the trie
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paths []string // the path of dirty nodes, sort by insertion order
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nodes map[string]*memoryNode // the map of dirty nodes, keyed by node path
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leaves []*leaf // the list of dirty leaves
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}
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// NewNodeSet initializes an empty node set to be used for tracking dirty nodes
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// from a specific account or storage trie. The owner is zero for the account
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// trie and the owning account address hash for storage tries.
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func NewNodeSet(owner common.Hash) *NodeSet {
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return &NodeSet{
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owner: owner,
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nodes: make(map[string]*memoryNode),
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}
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}
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// add caches node with provided path and node object.
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func (set *NodeSet) add(path string, node *memoryNode) {
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set.paths = append(set.paths, path)
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set.nodes[path] = node
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}
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// addLeaf caches the provided leaf node.
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func (set *NodeSet) addLeaf(node *leaf) {
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set.leaves = append(set.leaves, node)
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}
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// Len returns the number of dirty nodes contained in the set.
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func (set *NodeSet) Len() int {
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return len(set.nodes)
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}
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// MergedNodeSet represents a merged dirty node set for a group of tries.
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type MergedNodeSet struct {
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sets map[common.Hash]*NodeSet
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}
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// NewMergedNodeSet initializes an empty merged set.
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func NewMergedNodeSet() *MergedNodeSet {
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return &MergedNodeSet{sets: make(map[common.Hash]*NodeSet)}
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}
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// NewWithNodeSet constructs a merged nodeset with the provided single set.
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func NewWithNodeSet(set *NodeSet) *MergedNodeSet {
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merged := NewMergedNodeSet()
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merged.Merge(set)
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return merged
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}
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// Merge merges the provided dirty nodes of a trie into the set. The assumption
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// is held that no duplicated set belonging to the same trie will be merged twice.
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func (set *MergedNodeSet) Merge(other *NodeSet) error {
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_, present := set.sets[other.owner]
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if present {
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return fmt.Errorf("duplicate trie for owner %#x", other.owner)
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}
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set.sets[other.owner] = other
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return nil
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}
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