77 lines
2.0 KiB
Rust
77 lines
2.0 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
|
|
// This file is part of OpenEthereum.
|
|
|
|
// OpenEthereum 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.
|
|
|
|
// OpenEthereum 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 OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
use ethereum_types::H256;
|
|
use rlp::{DecoderError, Encodable, Rlp, RlpStream};
|
|
|
|
const PADDING: [u8; 10] = [0u8; 10];
|
|
|
|
pub struct DatabaseKey {
|
|
pub era: u64,
|
|
pub index: usize,
|
|
}
|
|
|
|
impl Encodable for DatabaseKey {
|
|
fn rlp_append(&self, s: &mut RlpStream) {
|
|
s.begin_list(3);
|
|
s.append(&self.era);
|
|
s.append(&self.index);
|
|
s.append(&&PADDING[..]);
|
|
}
|
|
}
|
|
|
|
pub struct DatabaseValueView<'a> {
|
|
rlp: Rlp<'a>,
|
|
}
|
|
|
|
impl<'a> DatabaseValueView<'a> {
|
|
pub fn from_rlp(data: &'a [u8]) -> Self {
|
|
DatabaseValueView {
|
|
rlp: Rlp::new(data),
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
pub fn id(&self) -> Result<H256, DecoderError> {
|
|
self.rlp.val_at(0)
|
|
}
|
|
|
|
#[inline]
|
|
pub fn inserts(&self) -> Result<Vec<H256>, DecoderError> {
|
|
self.rlp.list_at(1)
|
|
}
|
|
|
|
#[inline]
|
|
pub fn deletes(&self) -> Result<Vec<H256>, DecoderError> {
|
|
self.rlp.list_at(2)
|
|
}
|
|
}
|
|
|
|
pub struct DatabaseValueRef<'a> {
|
|
pub id: &'a H256,
|
|
pub inserts: &'a [H256],
|
|
pub deletes: &'a [H256],
|
|
}
|
|
|
|
impl<'a> Encodable for DatabaseValueRef<'a> {
|
|
fn rlp_append(&self, s: &mut RlpStream) {
|
|
s.begin_list(3);
|
|
s.append(self.id);
|
|
s.append_list(self.inserts);
|
|
s.append_list(self.deletes);
|
|
}
|
|
}
|