mirror of
https://github.com/pezkuwichain/pezkuwi-subxt.git
synced 2026-06-29 07:57:24 +00:00
Shawn Tabrizi
65 lines
2.0 KiB
Rust
65 lines
2.0 KiB
Rust
// Copyright 2017-2020 Parity Technologies (UK) Ltd.
|
|
// This file is part of Substrate.
|
|
|
|
// Substrate 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.
|
|
|
|
// Substrate 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 Substrate. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
//! Primitives for Substrate Proof-of-Work (PoW) consensus.
|
|
|
|
#![cfg_attr(not(feature = "std"), no_std)]
|
|
|
|
use sp_std::vec::Vec;
|
|
use sp_runtime::ConsensusEngineId;
|
|
use codec::Decode;
|
|
|
|
/// The `ConsensusEngineId` of PoW.
|
|
pub const POW_ENGINE_ID: ConsensusEngineId = [b'p', b'o', b'w', b'_'];
|
|
|
|
/// Type of seal.
|
|
pub type Seal = Vec<u8>;
|
|
|
|
/// Define methods that total difficulty should implement.
|
|
pub trait TotalDifficulty {
|
|
fn increment(&mut self, other: Self);
|
|
}
|
|
|
|
impl TotalDifficulty for sp_core::U256 {
|
|
fn increment(&mut self, other: Self) {
|
|
let ret = self.saturating_add(other);
|
|
*self = ret;
|
|
}
|
|
}
|
|
|
|
impl TotalDifficulty for u128 {
|
|
fn increment(&mut self, other: Self) {
|
|
let ret = self.saturating_add(other);
|
|
*self = ret;
|
|
}
|
|
}
|
|
|
|
sp_api::decl_runtime_apis! {
|
|
/// API necessary for timestamp-based difficulty adjustment algorithms.
|
|
pub trait TimestampApi<Moment: Decode> {
|
|
/// Return the timestamp in the current block.
|
|
fn timestamp() -> Moment;
|
|
}
|
|
|
|
/// API for those chains that put their difficulty adjustment algorithm directly
|
|
/// onto runtime. Note that while putting difficulty adjustment algorithm to
|
|
/// runtime is safe, putting the PoW algorithm on runtime is not.
|
|
pub trait DifficultyApi<Difficulty: Decode> {
|
|
/// Return the target difficulty of the next block.
|
|
fn difficulty() -> Difficulty;
|
|
}
|
|
}
|