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use hashdb::{HashDB, Hasher};
use super::triedb::TrieDB;
use super::{Result, Trie, TrieItem, TrieIterator, Query};
use node_codec::NodeCodec;
pub struct SecTrieDB<'db, H, C>
where
H: Hasher + 'db,
C: NodeCodec<H>
{
raw: TrieDB<'db, H, C>
}
impl<'db, H, C> SecTrieDB<'db, H, C>
where
H: Hasher,
C: NodeCodec<H>
{
pub fn new(db: &'db HashDB<H>, root: &'db H::Out) -> Result<Self, H::Out, C::Error> {
Ok(SecTrieDB { raw: TrieDB::new(db, root)? })
}
pub fn raw(&self) -> &TrieDB<H, C> {
&self.raw
}
pub fn raw_mut(&mut self) -> &mut TrieDB<'db, H, C> {
&mut self.raw
}
}
impl<'db, H, C> Trie<H, C> for SecTrieDB<'db, H, C>
where
H: Hasher,
C: NodeCodec<H>
{
fn root(&self) -> &H::Out { self.raw.root() }
fn contains(&self, key: &[u8]) -> Result<bool, H::Out, C::Error> {
self.raw.contains(H::hash(key).as_ref())
}
fn get_with<'a, 'key, Q: Query<H>>(&'a self, key: &'key [u8], query: Q) -> Result<Option<Q::Item>, H::Out, C::Error>
where 'a: 'key
{
self.raw.get_with(H::hash(key).as_ref(), query)
}
fn iter<'a>(&'a self) -> Result<Box<TrieIterator<H, C, Item = TrieItem<H::Out, C::Error>> + 'a>, H::Out, C::Error> {
TrieDB::iter(&self.raw)
}
}
#[cfg(test)]
mod test {
use memorydb::MemoryDB;
use hashdb::DBValue;
use keccak;
use keccak_hasher::KeccakHasher;
use ethtrie::{TrieDBMut, SecTrieDB, trie::{Trie, TrieMut}};
use ethereum_types::H256;
#[test]
fn trie_to_sectrie() {
let mut db = MemoryDB::<KeccakHasher>::new();
let mut root = H256::new();
{
let mut t = TrieDBMut::new(&mut db, &mut root);
t.insert(&keccak::keccak(&[0x01u8, 0x23]), &[0x01u8, 0x23]).unwrap();
}
let t = SecTrieDB::new(&db, &root).unwrap();
assert_eq!(t.get(&[0x01u8, 0x23]).unwrap().unwrap(), DBValue::from_slice(&[0x01u8, 0x23]));
}
}