Use indirect runtime calls for RialtoParachain (#1753)

* Use indirect runtime calls for RialtoParachain

* Code review fixes

bridges/relays/client-rialto-parachain/src/runtime_wrapper.rs

@@ -0,0 +1,57 @@
+// Copyright 2019-2021 Parity Technologies (UK) Ltd.
+// This file is part of Parity Bridges Common.
+
+// Parity Bridges Common 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.
+
+// Parity Bridges Common 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 Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Types that are specific to the `RialtoParachain` runtime. Normally we could use the full
+//! `RialtoParachain` runtime here, since it is constructed in this repo and we have access to it.
+//! However we use a wrapped runtime instead in order to test the indirect runtime calls
+//! functionality.
+
+use codec::{Decode, Encode};
+use scale_info::TypeInfo;
+
+use bp_header_chain::BridgeGrandpaCallOf;
+use bridge_runtime_common::messages::BridgeMessagesCallOf;
+use relay_substrate_client::calls::{SudoCall, XcmCall};
+
+// The indirect pallet call used to sync `Millau` GRANDPA finality to `RialtoParachain`.
+pub type BridgeMillauGrandpaCall = BridgeGrandpaCallOf<bp_millau::Millau>;
+// The indirect pallet call used to sync `Millau` messages to `RialtoParachain`.
+pub type BridgeMillauMessagesCall = BridgeMessagesCallOf<bp_millau::Millau>;
+
+/// `RialtoParachain` Runtime `Call` enum.
+///
+/// The enum represents a subset of possible `Call`s we can send to `RialtoParachain` chain.
+///
+/// All entries here (like pretty much in the entire file) must be kept in sync with
+/// `RialtoParachain` `construct_runtime`, so that we maintain SCALE-compatibility.
+#[allow(clippy::large_enum_variant)]
+#[derive(Encode, Decode, Debug, PartialEq, Eq, Clone, TypeInfo)]
+pub enum Call {
+	/// `Sudo` pallet.
+	#[codec(index = 2)]
+	Sudo(SudoCall<Call>),
+
+	/// `Xcm` pallet.
+	#[codec(index = 51)]
+	PolkadotXcm(XcmCall),
+
+	/// Millau GRANDPA bridge pallet.
+	#[codec(index = 55)]
+	BridgeMillauGrandpa(BridgeMillauGrandpaCall),
+	/// Millau messages bridge pallet.
+	#[codec(index = 56)]
+	BridgeMillauMessages(BridgeMillauMessagesCall),
+}