1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
// Copyright (C) Parity Technologies (UK) Ltd.
// This file is part of Polkadot.
// Polkadot 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.
// Polkadot 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 Polkadot. If not, see <http://www.gnu.org/licenses/>.
//! Declaration of the parachain specific origin and a pallet that hosts it.
use core::result;
use polkadot_primitives::Id as ParaId;
use sp_runtime::traits::BadOrigin;
pub use pallet::*;
/// Ensure that the origin `o` represents a parachain.
/// Returns `Ok` with the parachain ID that effected the extrinsic or an `Err` otherwise.
pub fn ensure_parachain<OuterOrigin>(o: OuterOrigin) -> result::Result<ParaId, BadOrigin>
where
OuterOrigin: Into<result::Result<Origin, OuterOrigin>>,
{
match o.into() {
Ok(Origin::Parachain(id)) => Ok(id),
_ => Err(BadOrigin),
}
}
/// There is no way to register an origin type in `construct_runtime` without a pallet the origin
/// belongs to.
///
/// This module fulfills only the single purpose of housing the `Origin` in `construct_runtime`.
// ideally, though, the `construct_runtime` should support a free-standing origin.
#[frame_support::pallet]
pub mod pallet {
use super::*;
use frame_support::pallet_prelude::*;
#[pallet::pallet]
pub struct Pallet<T>(_);
#[pallet::config]
pub trait Config: frame_system::Config {}
/// Origin for the parachains.
#[pallet::origin]
#[derive(
PartialEq,
Eq,
Clone,
Encode,
Decode,
sp_core::RuntimeDebug,
scale_info::TypeInfo,
MaxEncodedLen,
)]
pub enum Origin {
/// It comes from a parachain.
Parachain(ParaId),
}
}
impl From<u32> for Origin {
fn from(id: u32) -> Origin {
Origin::Parachain(id.into())
}
}