mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-04-26 16:57:58 +00:00
Bastian Köcher
67 lines
2.0 KiB
Rust
67 lines
2.0 KiB
Rust
// This file is part of Substrate.
|
|
|
|
// Copyright (C) 2020-2022 Parity Technologies (UK) Ltd.
|
|
// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
|
|
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <https://www.gnu.org/licenses/>.
|
|
|
|
use std::{collections::HashMap, sync::Arc};
|
|
|
|
use kvdb::KeyValueDB;
|
|
use node_primitives::Hash;
|
|
use sp_trie::{trie_types::TrieDBMutV1, TrieMut};
|
|
|
|
use crate::simple_trie::SimpleTrie;
|
|
|
|
/// Generate trie from given `key_values`.
|
|
///
|
|
/// Will fill your database `db` with trie data from `key_values` and
|
|
/// return root.
|
|
pub fn generate_trie(
|
|
db: Arc<dyn KeyValueDB>,
|
|
key_values: impl IntoIterator<Item = (Vec<u8>, Vec<u8>)>,
|
|
) -> Hash {
|
|
let mut root = Hash::default();
|
|
|
|
let (db, overlay) = {
|
|
let mut overlay = HashMap::new();
|
|
overlay.insert(
|
|
hex::decode("03170a2e7597b7b7e3d84c05391d139a62b157e78786d8c082f29dcf4c111314")
|
|
.expect("null key is valid"),
|
|
Some(vec![0]),
|
|
);
|
|
let mut trie = SimpleTrie { db, overlay: &mut overlay };
|
|
{
|
|
let mut trie_db = TrieDBMutV1::<crate::simple_trie::Hasher>::new(&mut trie, &mut root);
|
|
for (key, value) in key_values {
|
|
trie_db.insert(&key, &value).expect("trie insertion failed");
|
|
}
|
|
|
|
trie_db.commit();
|
|
}
|
|
(trie.db, overlay)
|
|
};
|
|
|
|
let mut transaction = db.transaction();
|
|
for (key, value) in overlay.into_iter() {
|
|
match value {
|
|
Some(value) => transaction.put(0, &key[..], &value[..]),
|
|
None => transaction.delete(0, &key[..]),
|
|
}
|
|
}
|
|
db.write(transaction).expect("Failed to write transaction");
|
|
|
|
root
|
|
}
|