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modify account_db to work on address hash, not address

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This commit is contained in:
Robert Habermeier 2016-07-01 14:32:59 +02:00
parent 21d5e105c1
commit 7df0aa2b60
1 changed files with 31 additions and 19 deletions
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50
ethcore/src/account_db.rs
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@ -3,24 +3,30 @@ use util::*;
static NULL_RLP_STATIC: [u8; 1] = [0x80; 1];
#[inline]
fn combine_key<'a>(address_hash: &'a H256, key: &'a H256) -> H256 {
address_hash ^ key
}
// TODO: introduce HashDBMut?
/// DB backend wrapper for Account trie
/// Transforms trie node keys for the database
pub struct AccountDB<'db> {
db: &'db HashDB,
address: H256,
}
#[inline]
fn combine_key<'a>(address: &'a H256, key: &'a H256) -> H256 {
address ^ key
address_hash: H256,
}
impl<'db> AccountDB<'db> {
pub fn new(db: &'db HashDB, address: &Address) -> AccountDB<'db> {
/// Create a new AccountDB from an address.
pub fn new(db: &'db HashDB, address: &Address) -> Self {
Self::from_hash(db, address.sha3())
}
/// Create a new AcountDB from an address' hash.
pub fn from_hash(db: &'db HashDB, address_hash: H256) -> Self {
AccountDB {
db: db,
address: address.into(),
address_hash: address_hash,
}
}
}
@ -34,14 +40,14 @@ impl<'db> HashDB for AccountDB<'db>{
if key == &SHA3_NULL_RLP {
return Some(&NULL_RLP_STATIC);
}
self.db.get(&combine_key(&self.address, key))
self.db.get(&combine_key(&self.address_hash, key))
}
fn contains(&self, key: &H256) -> bool {
if key == &SHA3_NULL_RLP {
return true;
}
self.db.contains(&combine_key(&self.address, key))
self.db.contains(&combine_key(&self.address_hash, key))
}
fn insert(&mut self, _value: &[u8]) -> H256 {
@ -60,20 +66,26 @@ impl<'db> HashDB for AccountDB<'db>{
/// DB backend wrapper for Account trie
pub struct AccountDBMut<'db> {
db: &'db mut HashDB,
address: H256,
address_hash: H256,
}
impl<'db> AccountDBMut<'db> {
pub fn new(db: &'db mut HashDB, address: &Address) -> AccountDBMut<'db> {
/// Create a new AccountDB from an address.
pub fn new(db: &'db mut HashDB, address: &Address) -> Self {
Self::from_hash(db, address.sha3())
}
/// Create a new AcountDB from an address' hash.
pub fn from_hash(db: &'db mut HashDB, address_hash: H256) -> Self {
AccountDBMut {
db: db,
address: address.into(),
address_hash: address_hash,
}
}
#[allow(dead_code)]
pub fn immutable(&'db self) -> AccountDB<'db> {
AccountDB { db: self.db, address: self.address.clone() }
AccountDB { db: self.db, address_hash: self.address_hash.clone() }
}
}
@ -86,14 +98,14 @@ impl<'db> HashDB for AccountDBMut<'db>{
if key == &SHA3_NULL_RLP {
return Some(&NULL_RLP_STATIC);
}
self.db.get(&combine_key(&self.address, key))
self.db.get(&combine_key(&self.address_hash, key))
}
fn contains(&self, key: &H256) -> bool {
if key == &SHA3_NULL_RLP {
return true;
}
self.db.contains(&combine_key(&self.address, key))
self.db.contains(&combine_key(&self.address_hash, key))
}
fn insert(&mut self, value: &[u8]) -> H256 {
@ -101,7 +113,7 @@ impl<'db> HashDB for AccountDBMut<'db>{
return SHA3_NULL_RLP.clone();
}
let k = value.sha3();
let ak = combine_key(&self.address, &k);
let ak = combine_key(&self.address_hash, &k);
self.db.emplace(ak, value.to_vec());
k
}
@ -110,7 +122,7 @@ impl<'db> HashDB for AccountDBMut<'db>{
if key == SHA3_NULL_RLP {
return;
}
let key = combine_key(&self.address, &key);
let key = combine_key(&self.address_hash, &key);
self.db.emplace(key, value.to_vec())
}
@ -118,7 +130,7 @@ impl<'db> HashDB for AccountDBMut<'db>{
if key == &SHA3_NULL_RLP {
return;
}
let key = combine_key(&self.address, key);
let key = combine_key(&self.address_hash, key);
self.db.remove(&key)
}
}