feat: Add parachaininfo pallet (#110)

Cargo.toml

@@ -11,6 +11,7 @@ members = [
     "rpc",
     "substrate-node/node",
     "substrate-node/runtime",
+    "parachain-info",
 ]
 
 exclude = [

parachain-info/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+authors = ["Parity Technologies <[email protected]>"]
+edition = "2021"
+name = "pallet-parachain-info"
+version = "0.1.0"
+license = "LGPL-3.0"
+
+[dependencies]
+codec = { package = "parity-scale-codec", version = "3.0", default-features = false, features = ["derive"] }
+scale-info = { version = "2.0", default-features = false, features = ["derive"] }
+
+frame-support = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.42", default-features = false }
+frame-system = { git = "https://github.com/paritytech/substrate", branch = "polkadot-v0.9.42", default-features = false }
+
+cumulus-primitives-core = { git = "https://github.com/paritytech/cumulus", branch = "polkadot-v0.9.42", default-features = false }
+
+[features]
+default = ["std"]
+std = [
+	"codec/std",
+	"scale-info/std",
+	"cumulus-primitives-core/std",
+	"frame-support/std",
+	"frame-system/std",
+]
+try-runtime = ["frame-support/try-runtime"]

parachain-info/src/lib.rs

@@ -0,0 +1,76 @@
+// Copyright 2020-2021 Parity Technologies (UK) Ltd.
+// This file is part of Cumulus.
+
+// Cumulus 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.
+
+// Cumulus 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 Cumulus.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Minimal Pallet that injects a ParachainId into Runtime storage from
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+pub use pallet::*;
+
+#[frame_support::pallet]
+pub mod pallet {
+	use cumulus_primitives_core::ParaId;
+	use frame_support::pallet_prelude::*;
+	use frame_system::pallet_prelude::*;
+
+	#[pallet::pallet]
+	#[pallet::without_storage_info]
+	pub struct Pallet<T>(_);
+
+	#[pallet::config]
+	pub trait Config: frame_system::Config {}
+
+	#[pallet::hooks]
+	impl<T: Config> Hooks<BlockNumberFor<T>> for Pallet<T> {}
+
+	#[pallet::call]
+	impl<T: Config> Pallet<T> {}
+
+	#[pallet::genesis_config]
+	pub struct GenesisConfig {
+		pub parachain_id: ParaId,
+	}
+
+	#[cfg(feature = "std")]
+	impl Default for GenesisConfig {
+		fn default() -> Self {
+			Self { parachain_id: 100.into() }
+		}
+	}
+
+	#[pallet::genesis_build]
+	impl<T: Config> GenesisBuild<T> for GenesisConfig {
+		fn build(&self) {
+			<ParachainId<T>>::put(&self.parachain_id);
+		}
+	}
+
+	#[pallet::type_value]
+	pub(super) fn DefaultForParachainId() -> ParaId {
+		100.into()
+	}
+
+	#[pallet::storage]
+	#[pallet::getter(fn parachain_id)]
+	pub(super) type ParachainId<T: Config> =
+		StorageValue<_, ParaId, ValueQuery, DefaultForParachainId>;
+
+	impl<T: Config> Get<ParaId> for Pallet<T> {
+		fn get() -> ParaId {
+			Self::parachain_id()
+		}
+	}
+}

substrate-node/node/Cargo.toml

@@ -42,6 +42,7 @@ sp-inherents = { version = "4.0.0-dev", git = "https://github.com/paritytech/sub
 sp-keyring = { version = "7.0.0", git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.42" }
 frame-system = { version = "4.0.0-dev", git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.42" }
 pallet-transaction-payment = { version = "4.0.0-dev", default-features = false, git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.42" }
+cumulus-primitives-core = { git = "https://github.com/paritytech/cumulus", branch = "polkadot-v0.9.42" }
 
 # These dependencies are used for the node template's RPCs
 jsonrpsee = { version = "0.16.2", features = ["server"] }

substrate-node/node/src/chain_spec.rs

@@ -1,6 +1,7 @@
 // The Licensed Work is (c) 2022 Sygma
 // SPDX-License-Identifier: LGPL-3.0-only
 
+use cumulus_primitives_core::ParaId;
 use node_template_runtime::{
 	AccountId, AuraConfig, BalancesConfig, GenesisConfig, GrandpaConfig, Signature, SudoConfig,
 	SystemConfig, WASM_BINARY,
@@ -135,6 +136,8 @@ fn testnet_genesis(
 	endowed_accounts: Vec<AccountId>,
 	_enable_println: bool,
 ) -> GenesisConfig {
+	// hardcoded dummy parachainID
+	let id: ParaId = ParaId::from(1000);
 	GenesisConfig {
 		system: SystemConfig {
 			// Add Wasm runtime to storage.
@@ -154,6 +157,7 @@ fn testnet_genesis(
 			// Assign network admin rights.
 			key: Some(root_key),
 		},
+		parachain_info: node_template_runtime::ParachainInfoConfig { parachain_id: id },
 		transaction_payment: Default::default(),
 	}
 }

substrate-node/runtime/Cargo.toml

@@ -68,6 +68,7 @@ sygma-bridge = { path = "../../bridge", default-features = false }
 sygma-access-segregator = { path = "../../access-segregator", default-features = false }
 sygma-fee-handler-router = { path = "../../fee-handler-router", default-features = false }
 sygma-runtime-api = { path = "../../runtime-api", default-features = false }
+pallet-parachain-info = { path = "../../parachain-info", default-features = false }
 
 [build-dependencies]
 substrate-wasm-builder = { git = "https://github.com/paritytech/substrate.git", branch = "polkadot-v0.9.42" }

substrate-node/runtime/src/lib.rs

@@ -221,6 +221,8 @@ impl frame_system::Config for Runtime {
 
 impl pallet_insecure_randomness_collective_flip::Config for Runtime {}
 
+impl pallet_parachain_info::Config for Runtime {}
+
 impl pallet_aura::Config for Runtime {
 	type AuthorityId = AuraId;
 	type DisabledValidators = ();
@@ -748,6 +750,7 @@ construct_runtime!(
 		SygmaBasicFeeHandler: sygma_basic_feehandler::{Pallet, Call, Storage, Event<T>} = 10,
 		SygmaBridge: sygma_bridge::{Pallet, Call, Storage, Event<T>} = 11,
 		SygmaFeeHandlerRouter: sygma_fee_handler_router::{Pallet, Call, Storage, Event<T>} = 12,
+		ParachainInfo: pallet_parachain_info::{Pallet, Storage, Config} = 20,
 	}
 );