98b7c07171
* Update `add_license` script * run script * add `remove duplicate lines script` and run it * Revert changes `English spaces` * strip whitespaces * Revert `GPL` in files with `apache/mit license` * don't append `gpl license` in files with other lic * Don't append `gpl header` in files with other lic. * re-ran script * include c and cpp files too * remove duplicate header * rebase nit
1310 lines
40 KiB
Rust
1310 lines
40 KiB
Rust
// Copyright 2015-2018 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU 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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// Parity 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 General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! In-memory trie representation.
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use super::{TrieError, TrieMut};
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use super::lookup::Lookup;
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use super::node::Node as RlpNode;
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use super::node::NodeKey;
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use hashdb::HashDB;
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use bytes::ToPretty;
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use nibbleslice::NibbleSlice;
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use rlp::{Rlp, RlpStream};
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use hashdb::DBValue;
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use std::collections::{HashSet, VecDeque};
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use std::mem;
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use std::ops::Index;
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use ethereum_types::H256;
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use elastic_array::ElasticArray1024;
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use keccak::{KECCAK_NULL_RLP};
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// For lookups into the Node storage buffer.
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// This is deliberately non-copyable.
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#[derive(Debug)]
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struct StorageHandle(usize);
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// Handles to nodes in the trie.
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#[derive(Debug)]
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enum NodeHandle {
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/// Loaded into memory.
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InMemory(StorageHandle),
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/// Either a hash or an inline node
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Hash(H256),
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}
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impl From<StorageHandle> for NodeHandle {
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fn from(handle: StorageHandle) -> Self {
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NodeHandle::InMemory(handle)
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}
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}
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impl From<H256> for NodeHandle {
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fn from(hash: H256) -> Self {
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NodeHandle::Hash(hash)
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}
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}
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fn empty_children() -> Box<[Option<NodeHandle>; 16]> {
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Box::new([
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None, None, None, None, None, None, None, None,
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None, None, None, None, None, None, None, None,
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])
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}
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/// Node types in the Trie.
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#[derive(Debug)]
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enum Node {
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/// Empty node.
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Empty,
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/// A leaf node contains the end of a key and a value.
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/// This key is encoded from a `NibbleSlice`, meaning it contains
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/// a flag indicating it is a leaf.
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Leaf(NodeKey, DBValue),
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/// An extension contains a shared portion of a key and a child node.
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/// The shared portion is encoded from a `NibbleSlice` meaning it contains
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/// a flag indicating it is an extension.
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/// The child node is always a branch.
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Extension(NodeKey, NodeHandle),
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/// A branch has up to 16 children and an optional value.
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Branch(Box<[Option<NodeHandle>; 16]>, Option<DBValue>)
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}
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impl Node {
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// load an inline node into memory or get the hash to do the lookup later.
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fn inline_or_hash(node: &[u8], db: &HashDB, storage: &mut NodeStorage) -> NodeHandle {
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RlpNode::try_decode_hash(&node)
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.map(NodeHandle::Hash)
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.unwrap_or_else(|| {
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let child = Node::from_rlp(node, db, storage);
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NodeHandle::InMemory(storage.alloc(Stored::New(child)))
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})
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}
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// decode a node from rlp without getting its children.
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fn from_rlp(rlp: &[u8], db: &HashDB, storage: &mut NodeStorage) -> Self {
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match RlpNode::decoded(rlp).expect("rlp read from db; qed") {
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RlpNode::Empty => Node::Empty,
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RlpNode::Leaf(k, v) => Node::Leaf(k.encoded(true), DBValue::from_slice(&v)),
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RlpNode::Extension(key, cb) => {
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Node::Extension(key.encoded(false), Self::inline_or_hash(cb, db, storage))
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}
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RlpNode::Branch(ref children_rlp, val) => {
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let mut child = |i| {
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let raw = children_rlp[i];
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let child_rlp = Rlp::new(raw);
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if !child_rlp.is_empty() {
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Some(Self::inline_or_hash(raw, db, storage))
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} else {
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None
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}
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};
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let children = Box::new([
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child(0), child(1), child(2), child(3),
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child(4), child(5), child(6), child(7),
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child(8), child(9), child(10), child(11),
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child(12), child(13), child(14), child(15),
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]);
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Node::Branch(children, val.map(DBValue::from_slice))
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}
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}
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}
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// encode a node to RLP
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// TODO: parallelize
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fn into_rlp<F>(self, mut child_cb: F) -> ElasticArray1024<u8>
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where F: FnMut(NodeHandle, &mut RlpStream)
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{
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match self {
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Node::Empty => {
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let mut stream = RlpStream::new();
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stream.append_empty_data();
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stream.drain()
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}
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Node::Leaf(partial, value) => {
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let mut stream = RlpStream::new_list(2);
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stream.append(&&*partial);
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stream.append(&&*value);
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stream.drain()
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}
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Node::Extension(partial, child) => {
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let mut stream = RlpStream::new_list(2);
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stream.append(&&*partial);
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child_cb(child, &mut stream);
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stream.drain()
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}
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Node::Branch(mut children, value) => {
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let mut stream = RlpStream::new_list(17);
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for child in children.iter_mut().map(Option::take) {
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if let Some(handle) = child {
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child_cb(handle, &mut stream);
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} else {
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stream.append_empty_data();
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}
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}
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if let Some(value) = value {
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stream.append(&&*value);
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} else {
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stream.append_empty_data();
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}
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stream.drain()
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}
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}
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}
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}
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// post-inspect action.
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enum Action {
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// Replace a node with a new one.
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Replace(Node),
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// Restore the original node. This trusts that the node is actually the original.
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Restore(Node),
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// if it is a new node, just clears the storage.
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Delete,
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}
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// post-insert action. Same as action without delete
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enum InsertAction {
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// Replace a node with a new one.
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Replace(Node),
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// Restore the original node.
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Restore(Node),
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}
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impl InsertAction {
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fn into_action(self) -> Action {
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match self {
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InsertAction::Replace(n) => Action::Replace(n),
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InsertAction::Restore(n) => Action::Restore(n),
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}
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}
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// unwrap the node, disregarding replace or restore state.
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fn unwrap_node(self) -> Node {
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match self {
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InsertAction::Replace(n) | InsertAction::Restore(n) => n,
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}
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}
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}
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// What kind of node is stored here.
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enum Stored {
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// A new node.
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New(Node),
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// A cached node, loaded from the DB.
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Cached(Node, H256),
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}
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/// Compact and cache-friendly storage for Trie nodes.
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struct NodeStorage {
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nodes: Vec<Stored>,
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free_indices: VecDeque<usize>,
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}
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impl NodeStorage {
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/// Create a new storage.
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fn empty() -> Self {
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NodeStorage {
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nodes: Vec::new(),
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free_indices: VecDeque::new(),
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}
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}
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/// Allocate a new node in the storage.
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fn alloc(&mut self, stored: Stored) -> StorageHandle {
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if let Some(idx) = self.free_indices.pop_front() {
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self.nodes[idx] = stored;
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StorageHandle(idx)
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} else {
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self.nodes.push(stored);
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StorageHandle(self.nodes.len() - 1)
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}
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}
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/// Remove a node from the storage, consuming the handle and returning the node.
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fn destroy(&mut self, handle: StorageHandle) -> Stored {
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let idx = handle.0;
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self.free_indices.push_back(idx);
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mem::replace(&mut self.nodes[idx], Stored::New(Node::Empty))
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}
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}
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impl<'a> Index<&'a StorageHandle> for NodeStorage {
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type Output = Node;
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fn index(&self, handle: &'a StorageHandle) -> &Node {
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match self.nodes[handle.0] {
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Stored::New(ref node) => node,
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Stored::Cached(ref node, _) => node,
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}
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}
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}
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/// A `Trie` implementation using a generic `HashDB` backing database.
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///
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/// Use it as a `TrieMut` trait object. You can use `db()` to get the backing database object.
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/// Note that changes are not committed to the database until `commit` is called.
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/// Querying the root or dropping the trie will commit automatically.
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///
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/// # Example
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/// ```
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/// extern crate patricia_trie as trie;
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/// extern crate keccak_hash;
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/// extern crate hashdb;
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/// extern crate memorydb;
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/// extern crate ethereum_types;
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///
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/// use keccak_hash::KECCAK_NULL_RLP;
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/// use trie::*;
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/// use hashdb::*;
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/// use memorydb::*;
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/// use ethereum_types::H256;
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///
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/// fn main() {
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/// let mut memdb = MemoryDB::new();
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/// let mut root = H256::new();
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/// let mut t = TrieDBMut::new(&mut memdb, &mut root);
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/// assert!(t.is_empty());
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/// assert_eq!(*t.root(), KECCAK_NULL_RLP);
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/// t.insert(b"foo", b"bar").unwrap();
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/// assert!(t.contains(b"foo").unwrap());
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/// assert_eq!(t.get(b"foo").unwrap().unwrap(), DBValue::from_slice(b"bar"));
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/// t.remove(b"foo").unwrap();
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/// assert!(!t.contains(b"foo").unwrap());
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/// }
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/// ```
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pub struct TrieDBMut<'a> {
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storage: NodeStorage,
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db: &'a mut HashDB,
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root: &'a mut H256,
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root_handle: NodeHandle,
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death_row: HashSet<H256>,
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/// The number of hash operations this trie has performed.
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/// Note that none are performed until changes are committed.
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hash_count: usize,
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}
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impl<'a> TrieDBMut<'a> {
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/// Create a new trie with backing database `db` and empty `root`.
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pub fn new(db: &'a mut HashDB, root: &'a mut H256) -> Self {
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*root = KECCAK_NULL_RLP;
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let root_handle = NodeHandle::Hash(KECCAK_NULL_RLP);
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TrieDBMut {
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storage: NodeStorage::empty(),
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db: db,
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root: root,
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root_handle: root_handle,
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death_row: HashSet::new(),
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hash_count: 0,
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}
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}
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/// Create a new trie with the backing database `db` and `root.
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/// Returns an error if `root` does not exist.
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pub fn from_existing(db: &'a mut HashDB, root: &'a mut H256) -> super::Result<Self> {
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if !db.contains(root) {
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return Err(Box::new(TrieError::InvalidStateRoot(*root)));
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}
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let root_handle = NodeHandle::Hash(*root);
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Ok(TrieDBMut {
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storage: NodeStorage::empty(),
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db: db,
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root: root,
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root_handle: root_handle,
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death_row: HashSet::new(),
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hash_count: 0,
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})
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}
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/// Get the backing database.
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pub fn db(&self) -> &HashDB {
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self.db
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}
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/// Get the backing database mutably.
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pub fn db_mut(&mut self) -> &mut HashDB {
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self.db
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}
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// cache a node by hash
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fn cache(&mut self, hash: H256) -> super::Result<StorageHandle> {
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let node_rlp = self.db.get(&hash).ok_or_else(|| Box::new(TrieError::IncompleteDatabase(hash)))?;
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let node = Node::from_rlp(&node_rlp, &*self.db, &mut self.storage);
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Ok(self.storage.alloc(Stored::Cached(node, hash)))
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}
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// inspect a node, choosing either to replace, restore, or delete it.
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// if restored or replaced, returns the new node along with a flag of whether it was changed.
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fn inspect<F>(&mut self, stored: Stored, inspector: F) -> super::Result<Option<(Stored, bool)>>
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where F: FnOnce(&mut Self, Node) -> super::Result<Action> {
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Ok(match stored {
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Stored::New(node) => match inspector(self, node)? {
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Action::Restore(node) => Some((Stored::New(node), false)),
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Action::Replace(node) => Some((Stored::New(node), true)),
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Action::Delete => None,
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},
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Stored::Cached(node, hash) => match inspector(self, node)? {
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Action::Restore(node) => Some((Stored::Cached(node, hash), false)),
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Action::Replace(node) => {
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self.death_row.insert(hash);
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Some((Stored::New(node), true))
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}
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Action::Delete => {
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self.death_row.insert(hash);
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None
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}
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},
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})
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}
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// walk the trie, attempting to find the key's node.
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fn lookup<'x, 'key>(&'x self, mut partial: NibbleSlice<'key>, handle: &NodeHandle) -> super::Result<Option<DBValue>>
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where 'x: 'key
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{
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let mut handle = handle;
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loop {
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let (mid, child) = match *handle {
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NodeHandle::Hash(ref hash) => return Lookup {
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db: &*self.db,
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query: DBValue::from_slice,
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hash: hash.clone(),
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}.look_up(partial),
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NodeHandle::InMemory(ref handle) => match self.storage[handle] {
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Node::Empty => return Ok(None),
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Node::Leaf(ref key, ref value) => {
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if NibbleSlice::from_encoded(key).0 == partial {
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return Ok(Some(DBValue::from_slice(value)));
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} else {
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return Ok(None);
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}
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}
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Node::Extension(ref slice, ref child) => {
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let slice = NibbleSlice::from_encoded(slice).0;
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if partial.starts_with(&slice) {
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(slice.len(), child)
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} else {
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return Ok(None);
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}
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}
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Node::Branch(ref children, ref value) => {
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if partial.is_empty() {
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return Ok(value.as_ref().map(|v| DBValue::from_slice(v)));
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} else {
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let idx = partial.at(0);
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match children[idx as usize].as_ref() {
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Some(child) => (1, child),
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None => return Ok(None),
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}
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}
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}
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}
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};
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partial = partial.mid(mid);
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handle = child;
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}
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}
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/// insert a key, value pair into the trie, creating new nodes if necessary.
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fn insert_at(&mut self, handle: NodeHandle, partial: NibbleSlice, value: DBValue, old_val: &mut Option<DBValue>)
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-> super::Result<(StorageHandle, bool)>
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{
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let h = match handle {
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NodeHandle::InMemory(h) => h,
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NodeHandle::Hash(h) => self.cache(h)?,
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};
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let stored = self.storage.destroy(h);
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let (new_stored, changed) = self.inspect(stored, move |trie, stored| {
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trie.insert_inspector(stored, partial, value, old_val).map(|a| a.into_action())
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})?.expect("Insertion never deletes.");
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Ok((self.storage.alloc(new_stored), changed))
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}
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/// the insertion inspector.
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fn insert_inspector(&mut self, node: Node, partial: NibbleSlice, value: DBValue, old_val: &mut Option<DBValue>)
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-> super::Result<InsertAction>
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{
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trace!(target: "trie", "augmented (partial: {:?}, value: {:?})", partial, value.pretty());
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Ok(match node {
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Node::Empty => {
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trace!(target: "trie", "empty: COMPOSE");
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InsertAction::Replace(Node::Leaf(partial.encoded(true), value))
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}
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Node::Branch(mut children, stored_value) => {
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trace!(target: "trie", "branch: ROUTE,AUGMENT");
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if partial.is_empty() {
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let unchanged = stored_value.as_ref() == Some(&value);
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let branch = Node::Branch(children, Some(value));
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*old_val = stored_value;
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match unchanged {
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true => InsertAction::Restore(branch),
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false => InsertAction::Replace(branch),
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}
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} else {
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let idx = partial.at(0) as usize;
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let partial = partial.mid(1);
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if let Some(child) = children[idx].take() {
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// original had something there. recurse down into it.
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let (new_child, changed) = self.insert_at(child, partial, value, old_val)?;
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children[idx] = Some(new_child.into());
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if !changed {
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// the new node we composed didn't change. that means our branch is untouched too.
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return Ok(InsertAction::Restore(Node::Branch(children, stored_value)));
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}
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} else {
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// original had nothing there. compose a leaf.
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let leaf = self.storage.alloc(Stored::New(Node::Leaf(partial.encoded(true), value)));
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children[idx] = Some(leaf.into());
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}
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InsertAction::Replace(Node::Branch(children, stored_value))
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}
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}
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Node::Leaf(encoded, stored_value) => {
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let existing_key = NibbleSlice::from_encoded(&encoded).0;
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let cp = partial.common_prefix(&existing_key);
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if cp == existing_key.len() && cp == partial.len() {
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trace!(target: "trie", "equivalent-leaf: REPLACE");
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// equivalent leaf.
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let unchanged = stored_value == value;
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*old_val = Some(stored_value);
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match unchanged {
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// unchanged. restore
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true => InsertAction::Restore(Node::Leaf(encoded.clone(), value)),
|
|
false => InsertAction::Replace(Node::Leaf(encoded.clone(), value)),
|
|
}
|
|
} else if cp == 0 {
|
|
trace!(target: "trie", "no-common-prefix, not-both-empty (exist={:?}; new={:?}): TRANSMUTE,AUGMENT", existing_key.len(), partial.len());
|
|
|
|
// one of us isn't empty: transmute to branch here
|
|
let mut children = empty_children();
|
|
let branch = if existing_key.is_empty() {
|
|
// always replace since branch isn't leaf.
|
|
Node::Branch(children, Some(stored_value))
|
|
} else {
|
|
let idx = existing_key.at(0) as usize;
|
|
let new_leaf = Node::Leaf(existing_key.mid(1).encoded(true), stored_value);
|
|
children[idx] = Some(self.storage.alloc(Stored::New(new_leaf)).into());
|
|
|
|
Node::Branch(children, None)
|
|
};
|
|
|
|
// always replace because whatever we get out here is not the branch we started with.
|
|
let branch_action = self.insert_inspector(branch, partial, value, old_val)?.unwrap_node();
|
|
InsertAction::Replace(branch_action)
|
|
} else if cp == existing_key.len() {
|
|
trace!(target: "trie", "complete-prefix (cp={:?}): AUGMENT-AT-END", cp);
|
|
|
|
// fully-shared prefix for an extension.
|
|
// make a stub branch and an extension.
|
|
let branch = Node::Branch(empty_children(), Some(stored_value));
|
|
// augment the new branch.
|
|
let branch = self.insert_inspector(branch, partial.mid(cp), value, old_val)?.unwrap_node();
|
|
|
|
// always replace since we took a leaf and made an extension.
|
|
let branch_handle = self.storage.alloc(Stored::New(branch)).into();
|
|
InsertAction::Replace(Node::Extension(existing_key.encoded(false), branch_handle))
|
|
} else {
|
|
trace!(target: "trie", "partially-shared-prefix (exist={:?}; new={:?}; cp={:?}): AUGMENT-AT-END", existing_key.len(), partial.len(), cp);
|
|
|
|
// partially-shared prefix for an extension.
|
|
// start by making a leaf.
|
|
let low = Node::Leaf(existing_key.mid(cp).encoded(true), stored_value);
|
|
|
|
// augment it. this will result in the Leaf -> cp == 0 routine,
|
|
// which creates a branch.
|
|
let augmented_low = self.insert_inspector(low, partial.mid(cp), value, old_val)?.unwrap_node();
|
|
|
|
// make an extension using it. this is a replacement.
|
|
InsertAction::Replace(Node::Extension(
|
|
existing_key.encoded_leftmost(cp, false),
|
|
self.storage.alloc(Stored::New(augmented_low)).into()
|
|
))
|
|
}
|
|
}
|
|
Node::Extension(encoded, child_branch) => {
|
|
let existing_key = NibbleSlice::from_encoded(&encoded).0;
|
|
let cp = partial.common_prefix(&existing_key);
|
|
if cp == 0 {
|
|
trace!(target: "trie", "no-common-prefix, not-both-empty (exist={:?}; new={:?}): TRANSMUTE,AUGMENT", existing_key.len(), partial.len());
|
|
|
|
// partial isn't empty: make a branch here
|
|
// extensions may not have empty partial keys.
|
|
assert!(!existing_key.is_empty());
|
|
let idx = existing_key.at(0) as usize;
|
|
|
|
let mut children = empty_children();
|
|
children[idx] = if existing_key.len() == 1 {
|
|
// direct extension, just replace.
|
|
Some(child_branch)
|
|
} else {
|
|
// more work required after branching.
|
|
let ext = Node::Extension(existing_key.mid(1).encoded(false), child_branch);
|
|
Some(self.storage.alloc(Stored::New(ext)).into())
|
|
};
|
|
|
|
// continue inserting.
|
|
let branch_action = self.insert_inspector(Node::Branch(children, None), partial, value, old_val)?.unwrap_node();
|
|
InsertAction::Replace(branch_action)
|
|
} else if cp == existing_key.len() {
|
|
trace!(target: "trie", "complete-prefix (cp={:?}): AUGMENT-AT-END", cp);
|
|
|
|
// fully-shared prefix.
|
|
|
|
// insert into the child node.
|
|
let (new_child, changed) = self.insert_at(child_branch, partial.mid(cp), value, old_val)?;
|
|
let new_ext = Node::Extension(existing_key.encoded(false), new_child.into());
|
|
|
|
// if the child branch wasn't changed, meaning this extension remains the same.
|
|
match changed {
|
|
true => InsertAction::Replace(new_ext),
|
|
false => InsertAction::Restore(new_ext),
|
|
}
|
|
} else {
|
|
trace!(target: "trie", "partially-shared-prefix (exist={:?}; new={:?}; cp={:?}): AUGMENT-AT-END", existing_key.len(), partial.len(), cp);
|
|
|
|
// partially-shared.
|
|
let low = Node::Extension(existing_key.mid(cp).encoded(false), child_branch);
|
|
// augment the extension. this will take the cp == 0 path, creating a branch.
|
|
let augmented_low = self.insert_inspector(low, partial.mid(cp), value, old_val)?.unwrap_node();
|
|
|
|
// always replace, since this extension is not the one we started with.
|
|
// this is known because the partial key is only the common prefix.
|
|
InsertAction::Replace(Node::Extension(
|
|
existing_key.encoded_leftmost(cp, false),
|
|
self.storage.alloc(Stored::New(augmented_low)).into()
|
|
))
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
/// Remove a node from the trie based on key.
|
|
fn remove_at(&mut self, handle: NodeHandle, partial: NibbleSlice, old_val: &mut Option<DBValue>)
|
|
-> super::Result<Option<(StorageHandle, bool)>>
|
|
{
|
|
let stored = match handle {
|
|
NodeHandle::InMemory(h) => self.storage.destroy(h),
|
|
NodeHandle::Hash(h) => {
|
|
let handle = self.cache(h)?;
|
|
self.storage.destroy(handle)
|
|
}
|
|
};
|
|
|
|
let opt = self.inspect(stored, move |trie, node| trie.remove_inspector(node, partial, old_val))?;
|
|
|
|
Ok(opt.map(|(new, changed)| (self.storage.alloc(new), changed)))
|
|
}
|
|
|
|
/// the removal inspector
|
|
fn remove_inspector(&mut self, node: Node, partial: NibbleSlice, old_val: &mut Option<DBValue>) -> super::Result<Action> {
|
|
Ok(match (node, partial.is_empty()) {
|
|
(Node::Empty, _) => Action::Delete,
|
|
(Node::Branch(c, None), true) => Action::Restore(Node::Branch(c, None)),
|
|
(Node::Branch(children, Some(val)), true) => {
|
|
*old_val = Some(val);
|
|
// always replace since we took the value out.
|
|
Action::Replace(self.fix(Node::Branch(children, None))?)
|
|
}
|
|
(Node::Branch(mut children, value), false) => {
|
|
let idx = partial.at(0) as usize;
|
|
if let Some(child) = children[idx].take() {
|
|
trace!(target: "trie", "removing value out of branch child, partial={:?}", partial);
|
|
match self.remove_at(child, partial.mid(1), old_val)? {
|
|
Some((new, changed)) => {
|
|
children[idx] = Some(new.into());
|
|
let branch = Node::Branch(children, value);
|
|
match changed {
|
|
// child was changed, so we were too.
|
|
true => Action::Replace(branch),
|
|
// unchanged, so we are too.
|
|
false => Action::Restore(branch),
|
|
}
|
|
}
|
|
None => {
|
|
// the child we took was deleted.
|
|
// the node may need fixing.
|
|
trace!(target: "trie", "branch child deleted, partial={:?}", partial);
|
|
Action::Replace(self.fix(Node::Branch(children, value))?)
|
|
}
|
|
}
|
|
} else {
|
|
// no change needed.
|
|
Action::Restore(Node::Branch(children, value))
|
|
}
|
|
}
|
|
(Node::Leaf(encoded, value), _) => {
|
|
if NibbleSlice::from_encoded(&encoded).0 == partial {
|
|
// this is the node we were looking for. Let's delete it.
|
|
*old_val = Some(value);
|
|
Action::Delete
|
|
} else {
|
|
// leaf the node alone.
|
|
trace!(target: "trie", "restoring leaf wrong partial, partial={:?}, existing={:?}", partial, NibbleSlice::from_encoded(&encoded).0);
|
|
Action::Restore(Node::Leaf(encoded, value))
|
|
}
|
|
}
|
|
(Node::Extension(encoded, child_branch), _) => {
|
|
let (cp, existing_len) = {
|
|
let existing_key = NibbleSlice::from_encoded(&encoded).0;
|
|
(existing_key.common_prefix(&partial), existing_key.len())
|
|
};
|
|
if cp == existing_len {
|
|
// try to remove from the child branch.
|
|
trace!(target: "trie", "removing from extension child, partial={:?}", partial);
|
|
match self.remove_at(child_branch, partial.mid(cp), old_val)? {
|
|
Some((new_child, changed)) => {
|
|
let new_child = new_child.into();
|
|
|
|
// if the child branch was unchanged, then the extension is too.
|
|
// otherwise, this extension may need fixing.
|
|
match changed {
|
|
true => Action::Replace(self.fix(Node::Extension(encoded, new_child))?),
|
|
false => Action::Restore(Node::Extension(encoded, new_child)),
|
|
}
|
|
}
|
|
None => {
|
|
// the whole branch got deleted.
|
|
// that means that this extension is useless.
|
|
Action::Delete
|
|
}
|
|
}
|
|
} else {
|
|
// partway through an extension -- nothing to do here.
|
|
Action::Restore(Node::Extension(encoded, child_branch))
|
|
}
|
|
}
|
|
})
|
|
}
|
|
|
|
/// Given a node which may be in an _invalid state_, fix it such that it is then in a valid
|
|
/// state.
|
|
///
|
|
/// _invalid state_ means:
|
|
/// - Branch node where there is only a single entry;
|
|
/// - Extension node followed by anything other than a Branch node.
|
|
fn fix(&mut self, node: Node) -> super::Result<Node> {
|
|
match node {
|
|
Node::Branch(mut children, value) => {
|
|
// if only a single value, transmute to leaf/extension and feed through fixed.
|
|
#[derive(Debug)]
|
|
enum UsedIndex {
|
|
None,
|
|
One(u8),
|
|
Many,
|
|
};
|
|
let mut used_index = UsedIndex::None;
|
|
for i in 0..16 {
|
|
match (children[i].is_none(), &used_index) {
|
|
(false, &UsedIndex::None) => used_index = UsedIndex::One(i as u8),
|
|
(false, &UsedIndex::One(_)) => {
|
|
used_index = UsedIndex::Many;
|
|
break;
|
|
}
|
|
_ => continue,
|
|
}
|
|
}
|
|
|
|
match (used_index, value) {
|
|
(UsedIndex::None, None) => panic!("Branch with no subvalues. Something went wrong."),
|
|
(UsedIndex::One(a), None) => {
|
|
// only one onward node. make an extension.
|
|
let new_partial = NibbleSlice::new_offset(&[a], 1).encoded(false);
|
|
let child = children[a as usize].take().expect("used_index only set if occupied; qed");
|
|
let new_node = Node::Extension(new_partial, child);
|
|
self.fix(new_node)
|
|
}
|
|
(UsedIndex::None, Some(value)) => {
|
|
// make a leaf.
|
|
trace!(target: "trie", "fixing: branch -> leaf");
|
|
Ok(Node::Leaf(NibbleSlice::new(&[]).encoded(true), value))
|
|
}
|
|
(_, value) => {
|
|
// all is well.
|
|
trace!(target: "trie", "fixing: restoring branch");
|
|
Ok(Node::Branch(children, value))
|
|
}
|
|
}
|
|
}
|
|
Node::Extension(partial, child) => {
|
|
let stored = match child {
|
|
NodeHandle::InMemory(h) => self.storage.destroy(h),
|
|
NodeHandle::Hash(h) => {
|
|
let handle = self.cache(h)?;
|
|
self.storage.destroy(handle)
|
|
}
|
|
};
|
|
|
|
let (child_node, maybe_hash) = match stored {
|
|
Stored::New(node) => (node, None),
|
|
Stored::Cached(node, hash) => (node, Some(hash))
|
|
};
|
|
|
|
match child_node {
|
|
Node::Extension(sub_partial, sub_child) => {
|
|
// combine with node below.
|
|
if let Some(hash) = maybe_hash {
|
|
// delete the cached child since we are going to replace it.
|
|
self.death_row.insert(hash);
|
|
}
|
|
let partial = NibbleSlice::from_encoded(&partial).0;
|
|
let sub_partial = NibbleSlice::from_encoded(&sub_partial).0;
|
|
|
|
let new_partial = NibbleSlice::new_composed(&partial, &sub_partial);
|
|
trace!(target: "trie", "fixing: extension combination. new_partial={:?}", new_partial);
|
|
self.fix(Node::Extension(new_partial.encoded(false), sub_child))
|
|
}
|
|
Node::Leaf(sub_partial, value) => {
|
|
// combine with node below.
|
|
if let Some(hash) = maybe_hash {
|
|
// delete the cached child since we are going to replace it.
|
|
self.death_row.insert(hash);
|
|
}
|
|
let partial = NibbleSlice::from_encoded(&partial).0;
|
|
let sub_partial = NibbleSlice::from_encoded(&sub_partial).0;
|
|
|
|
let new_partial = NibbleSlice::new_composed(&partial, &sub_partial);
|
|
trace!(target: "trie", "fixing: extension -> leaf. new_partial={:?}", new_partial);
|
|
Ok(Node::Leaf(new_partial.encoded(true), value))
|
|
}
|
|
child_node => {
|
|
trace!(target: "trie", "fixing: restoring extension");
|
|
|
|
// reallocate the child node.
|
|
let stored = if let Some(hash) = maybe_hash {
|
|
Stored::Cached(child_node, hash)
|
|
} else {
|
|
Stored::New(child_node)
|
|
};
|
|
|
|
Ok(Node::Extension(partial, self.storage.alloc(stored).into()))
|
|
}
|
|
}
|
|
}
|
|
other => Ok(other), // only ext and branch need fixing.
|
|
}
|
|
}
|
|
|
|
/// Commit the in-memory changes to disk, freeing their storage and
|
|
/// updating the state root.
|
|
pub fn commit(&mut self) {
|
|
trace!(target: "trie", "Committing trie changes to db.");
|
|
|
|
// always kill all the nodes on death row.
|
|
trace!(target: "trie", "{:?} nodes to remove from db", self.death_row.len());
|
|
for hash in self.death_row.drain() {
|
|
self.db.remove(&hash);
|
|
}
|
|
|
|
let handle = match self.root_handle() {
|
|
NodeHandle::Hash(_) => return, // no changes necessary.
|
|
NodeHandle::InMemory(h) => h,
|
|
};
|
|
|
|
match self.storage.destroy(handle) {
|
|
Stored::New(node) => {
|
|
let root_rlp = node.into_rlp(|child, stream| self.commit_node(child, stream));
|
|
*self.root = self.db.insert(&root_rlp[..]);
|
|
self.hash_count += 1;
|
|
|
|
trace!(target: "trie", "root node rlp: {:?}", (&root_rlp[..]).pretty());
|
|
self.root_handle = NodeHandle::Hash(*self.root);
|
|
}
|
|
Stored::Cached(node, hash) => {
|
|
// probably won't happen, but update the root and move on.
|
|
*self.root = hash;
|
|
self.root_handle = NodeHandle::InMemory(self.storage.alloc(Stored::Cached(node, hash)));
|
|
}
|
|
}
|
|
}
|
|
|
|
/// commit a node, hashing it, committing it to the db,
|
|
/// and writing it to the rlp stream as necessary.
|
|
fn commit_node(&mut self, handle: NodeHandle, stream: &mut RlpStream) {
|
|
match handle {
|
|
NodeHandle::Hash(h) => stream.append(&h),
|
|
NodeHandle::InMemory(h) => match self.storage.destroy(h) {
|
|
Stored::Cached(_, h) => stream.append(&h),
|
|
Stored::New(node) => {
|
|
let node_rlp = node.into_rlp(|child, stream| self.commit_node(child, stream));
|
|
if node_rlp.len() >= 32 {
|
|
let hash = self.db.insert(&node_rlp[..]);
|
|
self.hash_count += 1;
|
|
stream.append(&hash)
|
|
} else {
|
|
stream.append_raw(&node_rlp, 1)
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
// a hack to get the root node's handle
|
|
fn root_handle(&self) -> NodeHandle {
|
|
match self.root_handle {
|
|
NodeHandle::Hash(h) => NodeHandle::Hash(h),
|
|
NodeHandle::InMemory(StorageHandle(x)) => NodeHandle::InMemory(StorageHandle(x)),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> TrieMut for TrieDBMut<'a> {
|
|
fn root(&mut self) -> &H256 {
|
|
self.commit();
|
|
self.root
|
|
}
|
|
|
|
fn is_empty(&self) -> bool {
|
|
match self.root_handle {
|
|
NodeHandle::Hash(h) => h == KECCAK_NULL_RLP,
|
|
NodeHandle::InMemory(ref h) => match self.storage[h] {
|
|
Node::Empty => true,
|
|
_ => false,
|
|
}
|
|
}
|
|
}
|
|
|
|
fn get<'x, 'key>(&'x self, key: &'key [u8]) -> super::Result<Option<DBValue>> where 'x: 'key {
|
|
self.lookup(NibbleSlice::new(key), &self.root_handle)
|
|
}
|
|
|
|
fn insert(&mut self, key: &[u8], value: &[u8]) -> super::Result<Option<DBValue>> {
|
|
if value.is_empty() { return self.remove(key) }
|
|
|
|
let mut old_val = None;
|
|
|
|
trace!(target: "trie", "insert: key={:?}, value={:?}", key.pretty(), value.pretty());
|
|
|
|
let root_handle = self.root_handle();
|
|
let (new_handle, changed) = self.insert_at(
|
|
root_handle,
|
|
NibbleSlice::new(key),
|
|
DBValue::from_slice(value),
|
|
&mut old_val,
|
|
)?;
|
|
|
|
trace!(target: "trie", "insert: altered trie={}", changed);
|
|
self.root_handle = NodeHandle::InMemory(new_handle);
|
|
|
|
Ok(old_val)
|
|
}
|
|
|
|
fn remove(&mut self, key: &[u8]) -> super::Result<Option<DBValue>> {
|
|
trace!(target: "trie", "remove: key={:?}", key.pretty());
|
|
|
|
let root_handle = self.root_handle();
|
|
let key = NibbleSlice::new(key);
|
|
let mut old_val = None;
|
|
|
|
match self.remove_at(root_handle, key, &mut old_val)? {
|
|
Some((handle, changed)) => {
|
|
trace!(target: "trie", "remove: altered trie={}", changed);
|
|
self.root_handle = NodeHandle::InMemory(handle);
|
|
}
|
|
None => {
|
|
trace!(target: "trie", "remove: obliterated trie");
|
|
self.root_handle = NodeHandle::Hash(KECCAK_NULL_RLP);
|
|
*self.root = KECCAK_NULL_RLP;
|
|
}
|
|
}
|
|
|
|
Ok(old_val)
|
|
}
|
|
}
|
|
|
|
impl<'a> Drop for TrieDBMut<'a> {
|
|
fn drop(&mut self) {
|
|
self.commit();
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
extern crate triehash;
|
|
|
|
use self::triehash::trie_root;
|
|
use hashdb::*;
|
|
use memorydb::*;
|
|
use super::*;
|
|
use bytes::ToPretty;
|
|
use keccak::KECCAK_NULL_RLP;
|
|
use super::super::TrieMut;
|
|
use standardmap::*;
|
|
|
|
fn populate_trie<'db>(db: &'db mut HashDB, root: &'db mut H256, v: &[(Vec<u8>, Vec<u8>)]) -> TrieDBMut<'db> {
|
|
let mut t = TrieDBMut::new(db, root);
|
|
for i in 0..v.len() {
|
|
let key: &[u8]= &v[i].0;
|
|
let val: &[u8] = &v[i].1;
|
|
t.insert(key, val).unwrap();
|
|
}
|
|
t
|
|
}
|
|
|
|
fn unpopulate_trie<'db>(t: &mut TrieDBMut<'db>, v: &[(Vec<u8>, Vec<u8>)]) {
|
|
for i in v {
|
|
let key: &[u8]= &i.0;
|
|
t.remove(key).unwrap();
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn playpen() {
|
|
::ethcore_logger::init_log();
|
|
|
|
let mut seed = H256::new();
|
|
for test_i in 0..10 {
|
|
if test_i % 50 == 0 {
|
|
debug!("{:?} of 10000 stress tests done", test_i);
|
|
}
|
|
let x = StandardMap {
|
|
alphabet: Alphabet::Custom(b"@QWERTYUIOPASDFGHJKLZXCVBNM[/]^_".to_vec()),
|
|
min_key: 5,
|
|
journal_key: 0,
|
|
value_mode: ValueMode::Index,
|
|
count: 100,
|
|
}.make_with(&mut seed);
|
|
|
|
let real = trie_root(x.clone());
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut memtrie = populate_trie(&mut memdb, &mut root, &x);
|
|
|
|
memtrie.commit();
|
|
if *memtrie.root() != real {
|
|
println!("TRIE MISMATCH");
|
|
println!("");
|
|
println!("{:?} vs {:?}", memtrie.root(), real);
|
|
for i in &x {
|
|
println!("{:?} -> {:?}", i.0.pretty(), i.1.pretty());
|
|
}
|
|
}
|
|
assert_eq!(*memtrie.root(), real);
|
|
unpopulate_trie(&mut memtrie, &x);
|
|
memtrie.commit();
|
|
if *memtrie.root() != KECCAK_NULL_RLP {
|
|
println!("- TRIE MISMATCH");
|
|
println!("");
|
|
println!("{:?} vs {:?}", memtrie.root(), real);
|
|
for i in &x {
|
|
println!("{:?} -> {:?}", i.0.pretty(), i.1.pretty());
|
|
}
|
|
}
|
|
assert_eq!(*memtrie.root(), KECCAK_NULL_RLP);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn init() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
assert_eq!(*t.root(), KECCAK_NULL_RLP);
|
|
}
|
|
|
|
#[test]
|
|
fn insert_on_empty() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![ (vec![0x01u8, 0x23], vec![0x01u8, 0x23]) ]));
|
|
}
|
|
|
|
#[test]
|
|
fn remove_to_empty() {
|
|
let big_value = b"00000000000000000000000000000000";
|
|
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t1 = TrieDBMut::new(&mut memdb, &mut root);
|
|
t1.insert(&[0x01, 0x23], big_value).unwrap();
|
|
t1.insert(&[0x01, 0x34], big_value).unwrap();
|
|
let mut memdb2 = MemoryDB::new();
|
|
let mut root2 = H256::new();
|
|
let mut t2 = TrieDBMut::new(&mut memdb2, &mut root2);
|
|
t2.insert(&[0x01], big_value).unwrap();
|
|
t2.insert(&[0x01, 0x23], big_value).unwrap();
|
|
t2.insert(&[0x01, 0x34], big_value).unwrap();
|
|
t2.remove(&[0x01]).unwrap();
|
|
}
|
|
|
|
#[test]
|
|
fn insert_replace_root() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
t.insert(&[0x01u8, 0x23], &[0x23u8, 0x45]).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![ (vec![0x01u8, 0x23], vec![0x23u8, 0x45]) ]));
|
|
}
|
|
|
|
#[test]
|
|
fn insert_make_branch_root() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
t.insert(&[0x11u8, 0x23], &[0x11u8, 0x23]).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![
|
|
(vec![0x01u8, 0x23], vec![0x01u8, 0x23]),
|
|
(vec![0x11u8, 0x23], vec![0x11u8, 0x23])
|
|
]));
|
|
}
|
|
|
|
#[test]
|
|
fn insert_into_branch_root() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
t.insert(&[0xf1u8, 0x23], &[0xf1u8, 0x23]).unwrap();
|
|
t.insert(&[0x81u8, 0x23], &[0x81u8, 0x23]).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![
|
|
(vec![0x01u8, 0x23], vec![0x01u8, 0x23]),
|
|
(vec![0x81u8, 0x23], vec![0x81u8, 0x23]),
|
|
(vec![0xf1u8, 0x23], vec![0xf1u8, 0x23]),
|
|
]));
|
|
}
|
|
|
|
#[test]
|
|
fn insert_value_into_branch_root() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
t.insert(&[], &[0x0]).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![
|
|
(vec![], vec![0x0]),
|
|
(vec![0x01u8, 0x23], vec![0x01u8, 0x23]),
|
|
]));
|
|
}
|
|
|
|
#[test]
|
|
fn insert_split_leaf() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
t.insert(&[0x01u8, 0x34], &[0x01u8, 0x34]).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![
|
|
(vec![0x01u8, 0x23], vec![0x01u8, 0x23]),
|
|
(vec![0x01u8, 0x34], vec![0x01u8, 0x34]),
|
|
]));
|
|
}
|
|
|
|
#[test]
|
|
fn insert_split_extenstion() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01, 0x23, 0x45], &[0x01]).unwrap();
|
|
t.insert(&[0x01, 0xf3, 0x45], &[0x02]).unwrap();
|
|
t.insert(&[0x01, 0xf3, 0xf5], &[0x03]).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![
|
|
(vec![0x01, 0x23, 0x45], vec![0x01]),
|
|
(vec![0x01, 0xf3, 0x45], vec![0x02]),
|
|
(vec![0x01, 0xf3, 0xf5], vec![0x03]),
|
|
]));
|
|
}
|
|
|
|
#[test]
|
|
fn insert_big_value() {
|
|
let big_value0 = b"00000000000000000000000000000000";
|
|
let big_value1 = b"11111111111111111111111111111111";
|
|
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], big_value0).unwrap();
|
|
t.insert(&[0x11u8, 0x23], big_value1).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![
|
|
(vec![0x01u8, 0x23], big_value0.to_vec()),
|
|
(vec![0x11u8, 0x23], big_value1.to_vec())
|
|
]));
|
|
}
|
|
|
|
#[test]
|
|
fn insert_duplicate_value() {
|
|
let big_value = b"00000000000000000000000000000000";
|
|
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], big_value).unwrap();
|
|
t.insert(&[0x11u8, 0x23], big_value).unwrap();
|
|
assert_eq!(*t.root(), trie_root(vec![
|
|
(vec![0x01u8, 0x23], big_value.to_vec()),
|
|
(vec![0x11u8, 0x23], big_value.to_vec())
|
|
]));
|
|
}
|
|
|
|
#[test]
|
|
fn test_at_empty() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let t = TrieDBMut::new(&mut memdb, &mut root);
|
|
assert_eq!(t.get(&[0x5]), Ok(None));
|
|
}
|
|
|
|
#[test]
|
|
fn test_at_one() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
assert_eq!(t.get(&[0x1, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0x1u8, 0x23]));
|
|
t.commit();
|
|
assert_eq!(t.get(&[0x1, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0x1u8, 0x23]));
|
|
}
|
|
|
|
#[test]
|
|
fn test_at_three() {
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut memdb, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
t.insert(&[0xf1u8, 0x23], &[0xf1u8, 0x23]).unwrap();
|
|
t.insert(&[0x81u8, 0x23], &[0x81u8, 0x23]).unwrap();
|
|
assert_eq!(t.get(&[0x01, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0x01u8, 0x23]));
|
|
assert_eq!(t.get(&[0xf1, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0xf1u8, 0x23]));
|
|
assert_eq!(t.get(&[0x81, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0x81u8, 0x23]));
|
|
assert_eq!(t.get(&[0x82, 0x23]), Ok(None));
|
|
t.commit();
|
|
assert_eq!(t.get(&[0x01, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0x01u8, 0x23]));
|
|
assert_eq!(t.get(&[0xf1, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0xf1u8, 0x23]));
|
|
assert_eq!(t.get(&[0x81, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0x81u8, 0x23]));
|
|
assert_eq!(t.get(&[0x82, 0x23]), Ok(None));
|
|
}
|
|
|
|
#[test]
|
|
fn stress() {
|
|
let mut seed = H256::new();
|
|
for _ in 0..50 {
|
|
let x = StandardMap {
|
|
alphabet: Alphabet::Custom(b"@QWERTYUIOPASDFGHJKLZXCVBNM[/]^_".to_vec()),
|
|
min_key: 5,
|
|
journal_key: 0,
|
|
value_mode: ValueMode::Index,
|
|
count: 4,
|
|
}.make_with(&mut seed);
|
|
|
|
let real = trie_root(x.clone());
|
|
let mut memdb = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut memtrie = populate_trie(&mut memdb, &mut root, &x);
|
|
let mut y = x.clone();
|
|
y.sort_by(|ref a, ref b| a.0.cmp(&b.0));
|
|
let mut memdb2 = MemoryDB::new();
|
|
let mut root2 = H256::new();
|
|
let mut memtrie_sorted = populate_trie(&mut memdb2, &mut root2, &y);
|
|
if *memtrie.root() != real || *memtrie_sorted.root() != real {
|
|
println!("TRIE MISMATCH");
|
|
println!("");
|
|
println!("ORIGINAL... {:?}", memtrie.root());
|
|
for i in &x {
|
|
println!("{:?} -> {:?}", i.0.pretty(), i.1.pretty());
|
|
}
|
|
println!("SORTED... {:?}", memtrie_sorted.root());
|
|
for i in &y {
|
|
println!("{:?} -> {:?}", i.0.pretty(), i.1.pretty());
|
|
}
|
|
}
|
|
assert_eq!(*memtrie.root(), real);
|
|
assert_eq!(*memtrie_sorted.root(), real);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn test_trie_existing() {
|
|
let mut root = H256::new();
|
|
let mut db = MemoryDB::new();
|
|
{
|
|
let mut t = TrieDBMut::new(&mut db, &mut root);
|
|
t.insert(&[0x01u8, 0x23], &[0x01u8, 0x23]).unwrap();
|
|
}
|
|
|
|
{
|
|
let _ = TrieDBMut::from_existing(&mut db, &mut root);
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn insert_empty() {
|
|
let mut seed = H256::new();
|
|
let x = StandardMap {
|
|
alphabet: Alphabet::Custom(b"@QWERTYUIOPASDFGHJKLZXCVBNM[/]^_".to_vec()),
|
|
min_key: 5,
|
|
journal_key: 0,
|
|
value_mode: ValueMode::Index,
|
|
count: 4,
|
|
}.make_with(&mut seed);
|
|
|
|
let mut db = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut db, &mut root);
|
|
for &(ref key, ref value) in &x {
|
|
t.insert(key, value).unwrap();
|
|
}
|
|
|
|
assert_eq!(*t.root(), trie_root(x.clone()));
|
|
|
|
for &(ref key, _) in &x {
|
|
t.insert(key, &[]).unwrap();
|
|
}
|
|
|
|
assert!(t.is_empty());
|
|
assert_eq!(*t.root(), KECCAK_NULL_RLP);
|
|
}
|
|
|
|
#[test]
|
|
fn return_old_values() {
|
|
let mut seed = H256::new();
|
|
let x = StandardMap {
|
|
alphabet: Alphabet::Custom(b"@QWERTYUIOPASDFGHJKLZXCVBNM[/]^_".to_vec()),
|
|
min_key: 5,
|
|
journal_key: 0,
|
|
value_mode: ValueMode::Index,
|
|
count: 4,
|
|
}.make_with(&mut seed);
|
|
|
|
let mut db = MemoryDB::new();
|
|
let mut root = H256::new();
|
|
let mut t = TrieDBMut::new(&mut db, &mut root);
|
|
for &(ref key, ref value) in &x {
|
|
assert!(t.insert(key, value).unwrap().is_none());
|
|
assert_eq!(t.insert(key, value).unwrap(), Some(DBValue::from_slice(value)));
|
|
}
|
|
|
|
for (key, value) in x {
|
|
assert_eq!(t.remove(&key).unwrap(), Some(DBValue::from_slice(&value)));
|
|
assert!(t.remove(&key).unwrap().is_none());
|
|
}
|
|
}
|
|
}
|