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pezkuwi-subxt/substrate/srml/support/src/hashable.rs
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2019-02-03 11:42:12 +01:00

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Rust

// Copyright 2017-2018 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/>.
//! Hashable trait.
use crate::codec::Codec;
use runtime_io::{blake2_256, twox_128, twox_256};
pub trait Hashable: Sized {
fn blake2_256(&self) -> [u8; 32];
fn twox_128(&self) -> [u8; 16];
fn twox_256(&self) -> [u8; 32];
}
impl<T: Codec> Hashable for T {
fn blake2_256(&self) -> [u8; 32] {
blake2_256(&self.encode())
}
fn twox_128(&self) -> [u8; 16] {
twox_128(&self.encode())
}
fn twox_256(&self) -> [u8; 32] {
twox_256(&self.encode())
}
}