From bd85b3c7d31ebd3881939d0f3bfa4d26fb89494f Mon Sep 17 00:00:00 2001
From: Fedor Sakharov <fedor.sakharov@gmail.com>
Date: Wed, 5 Aug 2020 22:24:20 +0300
Subject: [PATCH] Add an Origin to parachains v1 (#1542)
---
polkadot/runtime/parachains/src/lib.rs | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/polkadot/runtime/parachains/src/lib.rs b/polkadot/runtime/parachains/src/lib.rs
index 5abc2fa32ca..b41968b480f 100644
--- a/polkadot/runtime/parachains/src/lib.rs
+++ b/polkadot/runtime/parachains/src/lib.rs
@@ -23,6 +23,11 @@
#![cfg_attr(not(feature = "std"), no_std)]
+use sp_std::result;
+use sp_runtime::traits::BadOrigin;
+use primitives::v1::Id as ParaId;
+use codec::{Decode, Encode};
+
pub mod configuration;
pub mod inclusion;
pub mod inclusion_inherent;
@@ -35,3 +40,22 @@ pub mod runtime_api_impl;
#[cfg(test)]
mod mock;
+
+/// Origin for the parachains.
+#[derive(PartialEq, Eq, Clone, Encode, Decode)]
+#[cfg_attr(feature = "std", derive(Debug))]
+pub enum Origin {
+ /// It comes from a parachain.
+ Parachain(ParaId),
+}
+
+/// 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),
+ }
+}
--
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