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Update kvdb-* and trie (#4483)

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This commit is contained in:
Nikolay Volf
2020-01-03 23:46:42 +03:00
committed by Gavin Wood
parent 5cf682cece
commit f0e21eff09
15 changed files with 120 additions and 139 deletions
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substrate/client/db/src/children.rs
+13 -14
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@@ -21,12 +21,11 @@ use codec::{Encode, Decode};
use sp_blockchain;
use std::hash::Hash;
/// Returns the hashes of the children blocks of the block with `parent_hash`.
pub fn read_children<
K: Eq + Hash + Clone + Encode + Decode,
V: Eq + Hash + Clone + Encode + Decode,
>(db: &dyn KeyValueDB, column: Option<u32>, prefix: &[u8], parent_hash: K) -> sp_blockchain::Result<Vec<V>> {
>(db: &dyn KeyValueDB, column: u32, prefix: &[u8], parent_hash: K) -> sp_blockchain::Result<Vec<V>> {
let mut buf = prefix.to_vec();
parent_hash.using_encoded(|s| buf.extend(s));
@@ -55,7 +54,7 @@ pub fn write_children<
V: Eq + Hash + Clone + Encode + Decode,
>(
tx: &mut DBTransaction,
column: Option<u32>,
column: u32,
prefix: &[u8],
parent_hash: K,
children_hashes: V,
@@ -70,7 +69,7 @@ pub fn remove_children<
K: Eq + Hash + Clone + Encode + Decode,
>(
tx: &mut DBTransaction,
column: Option<u32>,
column: u32,
prefix: &[u8],
parent_hash: K,
) {
@@ -87,33 +86,33 @@ mod tests {
#[test]
fn children_write_read_remove() {
const PREFIX: &[u8] = b"children";
let db = ::kvdb_memorydb::create(0);
let db = ::kvdb_memorydb::create(1);
let mut tx = DBTransaction::new();
let mut children1 = Vec::new();
children1.push(1_3);
children1.push(1_5);
write_children(&mut tx, None, PREFIX, 1_1, children1);
write_children(&mut tx, 0, PREFIX, 1_1, children1);
let mut children2 = Vec::new();
children2.push(1_4);
children2.push(1_6);
write_children(&mut tx, None, PREFIX, 1_2, children2);
write_children(&mut tx, 0, PREFIX, 1_2, children2);
db.write(tx.clone()).unwrap();
db.write(tx.clone()).expect("(2) Commiting transaction failed");
let r1: Vec<u32> = read_children(&db, None, PREFIX, 1_1).unwrap();
let r2: Vec<u32> = read_children(&db, None, PREFIX, 1_2).unwrap();
let r1: Vec<u32> = read_children(&db, 0, PREFIX, 1_1).expect("(1) Getting r1 failed");
let r2: Vec<u32> = read_children(&db, 0, PREFIX, 1_2).expect("(1) Getting r2 failed");
assert_eq!(r1, vec![1_3, 1_5]);
assert_eq!(r2, vec![1_4, 1_6]);
remove_children(&mut tx, None, PREFIX, 1_2);
db.write(tx).unwrap();
remove_children(&mut tx, 0, PREFIX, 1_2);
db.write(tx).expect("(2) Commiting transaction failed");
let r1: Vec<u32> = read_children(&db, None, PREFIX, 1_1).unwrap();
let r2: Vec<u32> = read_children(&db, None, PREFIX, 1_2).unwrap();
let r1: Vec<u32> = read_children(&db, 0, PREFIX, 1_1).expect("(2) Getting r1 failed");
let r2: Vec<u32> = read_children(&db, 0, PREFIX, 1_2).expect("(2) Getting r2 failed");
assert_eq!(r1, vec![1_3, 1_5]);
assert_eq!(r2.len(), 0);