212 lines
6.9 KiB
Go
212 lines
6.9 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 trie
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import (
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"fmt"
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"reflect"
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"strings"
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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, empty for deleted nodes
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size uint16 // Byte size of the useful cached data, 0 for deleted nodes
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node node // Cached collapsed trie node, or raw rlp data, nil for deleted nodes
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}
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// memoryNodeSize is the raw size of a memoryNode data structure without any
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// node data included. It's an approximate size, but should be a lot better
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// than not counting them.
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// nolint:unused
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var memoryNodeSize = int(reflect.TypeOf(memoryNode{}).Size())
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// memorySize returns the total memory size used by this node.
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// nolint:unused
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func (n *memoryNode) memorySize(key int) int {
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return int(n.size) + memoryNodeSize + key
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}
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// rlp returns the raw rlp encoded blob of the cached trie node, either directly
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// from the cache, or by regenerating it from the collapsed node.
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// nolint:unused
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func (n *memoryNode) rlp() []byte {
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if node, ok := n.node.(rawNode); ok {
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return node
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}
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return nodeToBytes(n.node)
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}
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// obj returns the decoded and expanded trie node, either directly from the cache,
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// or by regenerating it from the rlp encoded blob.
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// nolint:unused
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func (n *memoryNode) obj() node {
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if node, ok := n.node.(rawNode); ok {
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return mustDecodeNode(n.hash[:], node)
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}
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return expandNode(n.hash[:], n.node)
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}
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// nodeWithPrev wraps the memoryNode with the previous node value.
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type nodeWithPrev struct {
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*memoryNode
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prev []byte // RLP-encoded previous value, nil means it's non-existent
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}
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// unwrap returns the internal memoryNode object.
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// nolint:unused
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func (n *nodeWithPrev) unwrap() *memoryNode {
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return n.memoryNode
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}
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// memorySize returns the total memory size used by this node. It overloads
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// the function in memoryNode by counting the size of previous value as well.
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// nolint: unused
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func (n *nodeWithPrev) memorySize(key int) int {
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return n.memoryNode.memorySize(key) + len(n.prev)
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}
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// nodesWithOrder represents a collection of dirty nodes which includes
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// newly-inserted and updated nodes. The modification order of all nodes
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// is represented by order list.
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type nodesWithOrder struct {
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order []string // the path list of dirty nodes, sort by insertion order
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nodes map[string]*nodeWithPrev // the map of dirty nodes, keyed by node path
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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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updates *nodesWithOrder // the set of updated nodes(newly inserted, updated)
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deletes map[string][]byte // the map of deleted nodes, keyed by node
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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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updates: &nodesWithOrder{
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nodes: make(map[string]*nodeWithPrev),
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},
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deletes: make(map[string][]byte),
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}
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}
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/*
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// NewNodeSetWithDeletion initializes the nodeset with provided deletion set.
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func NewNodeSetWithDeletion(owner common.Hash, paths [][]byte, prev [][]byte) *NodeSet {
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set := NewNodeSet(owner)
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for i, path := range paths {
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set.markDeleted(path, prev[i])
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}
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return set
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}
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*/
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// markUpdated marks the node as dirty(newly-inserted or updated) with provided
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// node path, node object along with its previous value.
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func (set *NodeSet) markUpdated(path []byte, node *memoryNode, prev []byte) {
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set.updates.order = append(set.updates.order, string(path))
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set.updates.nodes[string(path)] = &nodeWithPrev{
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memoryNode: node,
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prev: prev,
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}
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}
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// markDeleted marks the node as deleted with provided path and previous value.
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func (set *NodeSet) markDeleted(path []byte, prev []byte) {
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set.deletes[string(path)] = prev
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}
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// addLeaf collects the provided leaf node into set.
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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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// Size returns the number of updated and deleted nodes contained in the set.
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func (set *NodeSet) Size() (int, int) {
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return len(set.updates.order), len(set.deletes)
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}
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// Hashes returns the hashes of all updated nodes. TODO(rjl493456442) how can
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// we get rid of it?
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func (set *NodeSet) Hashes() []common.Hash {
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var ret []common.Hash
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for _, node := range set.updates.nodes {
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ret = append(ret, node.hash)
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}
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return ret
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}
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// Summary returns a string-representation of the NodeSet.
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func (set *NodeSet) Summary() string {
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var out = new(strings.Builder)
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fmt.Fprintf(out, "nodeset owner: %v\n", set.owner)
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if set.updates != nil {
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for _, key := range set.updates.order {
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updated := set.updates.nodes[key]
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if updated.prev != nil {
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fmt.Fprintf(out, " [*]: %x -> %v prev: %x\n", key, updated.hash, updated.prev)
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} else {
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fmt.Fprintf(out, " [+]: %x -> %v\n", key, updated.hash)
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}
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}
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}
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for k, n := range set.deletes {
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fmt.Fprintf(out, " [-]: %x -> %x\n", k, n)
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}
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for _, n := range set.leaves {
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fmt.Fprintf(out, "[leaf]: %v\n", n)
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}
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return out.String()
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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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