ipld-eth-statedb/trie_by_cid/trie/trienode/node.go
Roy Crihfield 761d60acdf Geth 1.13 (Deneb/Cancun) update (#5)
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
2024-05-29 10:00:12 +00:00

200 lines
5.8 KiB
Go

// Copyright 2023 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 trienode
import (
"fmt"
"sort"
"strings"
"github.com/ethereum/go-ethereum/common"
)
// Node is a wrapper which contains the encoded blob of the trie node and its
// node hash. It is general enough that can be used to represent trie node
// corresponding to different trie implementations.
type Node struct {
Hash common.Hash // Node hash, empty for deleted node
Blob []byte // Encoded node blob, nil for the deleted node
}
// Size returns the total memory size used by this node.
func (n *Node) Size() int {
return len(n.Blob) + common.HashLength
}
// IsDeleted returns the indicator if the node is marked as deleted.
func (n *Node) IsDeleted() bool {
return len(n.Blob) == 0
}
// New constructs a node with provided node information.
func New(hash common.Hash, blob []byte) *Node {
return &Node{Hash: hash, Blob: blob}
}
// NewDeleted constructs a node which is deleted.
func NewDeleted() *Node { return New(common.Hash{}, nil) }
// leaf represents a trie leaf node
type leaf struct {
Blob []byte // raw blob of leaf
Parent common.Hash // the hash of parent node
}
// NodeSet contains a set of nodes collected during the commit operation.
// Each node is keyed by path. It's not thread-safe to use.
type NodeSet struct {
Owner common.Hash
Leaves []*leaf
Nodes map[string]*Node
updates int // the count of updated and inserted nodes
deletes int // the count of deleted nodes
}
// NewNodeSet initializes a node set. The owner is zero for the account trie and
// the owning account address hash for storage tries.
func NewNodeSet(owner common.Hash) *NodeSet {
return &NodeSet{
Owner: owner,
Nodes: make(map[string]*Node),
}
}
// ForEachWithOrder iterates the nodes with the order from bottom to top,
// right to left, nodes with the longest path will be iterated first.
func (set *NodeSet) ForEachWithOrder(callback func(path string, n *Node)) {
var paths []string
for path := range set.Nodes {
paths = append(paths, path)
}
// Bottom-up, the longest path first
sort.Sort(sort.Reverse(sort.StringSlice(paths)))
for _, path := range paths {
callback(path, set.Nodes[path])
}
}
// AddNode adds the provided node into set.
func (set *NodeSet) AddNode(path []byte, n *Node) {
if n.IsDeleted() {
set.deletes += 1
} else {
set.updates += 1
}
set.Nodes[string(path)] = n
}
// Merge adds a set of nodes into the set.
func (set *NodeSet) Merge(owner common.Hash, nodes map[string]*Node) error {
if set.Owner != owner {
return fmt.Errorf("nodesets belong to different owner are not mergeable %x-%x", set.Owner, owner)
}
for path, node := range nodes {
prev, ok := set.Nodes[path]
if ok {
// overwrite happens, revoke the counter
if prev.IsDeleted() {
set.deletes -= 1
} else {
set.updates -= 1
}
}
set.AddNode([]byte(path), node)
}
return nil
}
// AddLeaf adds the provided leaf node into set. TODO(rjl493456442) how can
// we get rid of it?
func (set *NodeSet) AddLeaf(parent common.Hash, blob []byte) {
set.Leaves = append(set.Leaves, &leaf{Blob: blob, Parent: parent})
}
// Size returns the number of dirty nodes in set.
func (set *NodeSet) Size() (int, int) {
return set.updates, set.deletes
}
// Hashes returns the hashes of all updated nodes. TODO(rjl493456442) how can
// we get rid of it?
func (set *NodeSet) Hashes() []common.Hash {
var ret []common.Hash
for _, node := range set.Nodes {
ret = append(ret, node.Hash)
}
return ret
}
// Summary returns a string-representation of the NodeSet.
func (set *NodeSet) Summary() string {
var out = new(strings.Builder)
fmt.Fprintf(out, "nodeset owner: %v\n", set.Owner)
if set.Nodes != nil {
for path, n := range set.Nodes {
// Deletion
if n.IsDeleted() {
fmt.Fprintf(out, " [-]: %x\n", path)
continue
}
// Insertion or update
fmt.Fprintf(out, " [+/*]: %x -> %v \n", path, n.Hash)
}
}
for _, n := range set.Leaves {
fmt.Fprintf(out, "[leaf]: %v\n", n)
}
return out.String()
}
// MergedNodeSet represents a merged node set for a group of tries.
type MergedNodeSet struct {
Sets map[common.Hash]*NodeSet
}
// NewMergedNodeSet initializes an empty merged set.
func NewMergedNodeSet() *MergedNodeSet {
return &MergedNodeSet{Sets: make(map[common.Hash]*NodeSet)}
}
// NewWithNodeSet constructs a merged nodeset with the provided single set.
func NewWithNodeSet(set *NodeSet) *MergedNodeSet {
merged := NewMergedNodeSet()
merged.Merge(set)
return merged
}
// Merge merges the provided dirty nodes of a trie into the set. The assumption
// is held that no duplicated set belonging to the same trie will be merged twice.
func (set *MergedNodeSet) Merge(other *NodeSet) error {
subset, present := set.Sets[other.Owner]
if present {
return subset.Merge(other.Owner, other.Nodes)
}
set.Sets[other.Owner] = other
return nil
}
// Flatten returns a two-dimensional map for internal nodes.
func (set *MergedNodeSet) Flatten() map[common.Hash]map[string]*Node {
nodes := make(map[common.Hash]map[string]*Node)
for owner, set := range set.Sets {
nodes[owner] = set.Nodes
}
return nodes
}