Set get_preset for BridgeHubKusama

Cargo.toml

@@ -189,7 +189,7 @@ sc-chain-spec = { version = "34.0.0" }
 scale-info = { version = "2.10.0", default-features = false }
 separator = { version = "0.4.1" }
 serde = { version = "1.0.196" }
-serde_json = { version = "1.0.113" }
+serde_json = { version = "1.0.113", default-features = false }
 smallvec = { version = "1.13.1" }
 snowbridge-beacon-primitives = { version = "0.7.0", default-features = false }
 snowbridge-core = { version = "0.7.0", default-features = false }

system-parachains/bridge-hubs/bridge-hub-kusama/Cargo.toml

@@ -17,6 +17,7 @@ hex-literal = { workspace = true }
 log = { workspace = true }
 scale-info = { features = ["derive"], workspace = true }
 serde = { optional = true, features = ["derive"], workspace = true }
+serde_json = { features = ["alloc"], workspace = true }
 tuplex = { workspace = true }
 
 # Local
@@ -191,6 +192,7 @@ std = [
 	"polkadot-runtime-constants/std",
 	"scale-info/std",
 	"serde",
+	"serde_json/std",
 	"snowbridge-beacon-primitives/std",
 	"snowbridge-core/std",
 	"snowbridge-outbound-queue-runtime-api/std",

system-parachains/bridge-hubs/bridge-hub-kusama/src/genesis_config_presets.rs

@@ -0,0 +1,92 @@
+// 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/>.
+
+//! Genesis configs presets for the BridgeHubKusama runtime
+
+use crate::*;
+use sp_std::vec::Vec;
+use system_parachains_constants::genesis_presets::*;
+
+const BRIDGE_HUB_KUSAMA_ED: Balance = crate::ExistentialDeposit::get();
+
+fn bridge_hub_kusama_genesis(
+	invulnerables: Vec<(AccountId, AuraId)>,
+	endowed_accounts: Vec<AccountId>,
+	id: ParaId,
+) -> serde_json::Value {
+	serde_json::json!({
+		"balances": BalancesConfig {
+			balances: endowed_accounts
+				.iter()
+				.cloned()
+				.map(|k| (k, BRIDGE_HUB_KUSAMA_ED * 4096 * 4096))
+				.collect(),
+		},
+		"parachainInfo": ParachainInfoConfig {
+			parachain_id: id,
+			..Default::default()
+		},
+		"collatorSelection": CollatorSelectionConfig {
+			invulnerables: invulnerables.iter().cloned().map(|(acc, _)| acc).collect(),
+			candidacy_bond: BRIDGE_HUB_KUSAMA_ED * 16,
+			..Default::default()
+		},
+		"session": SessionConfig {
+			keys: invulnerables
+				.into_iter()
+				.map(|(acc, aura)| {
+					(
+						acc.clone(),                          // account id
+						acc,                                  // validator id
+						SessionKeys { aura }, 				  // session keys
+					)
+				})
+				.collect(),
+		},
+		"polkadotXcm": {
+			"safeXcmVersion": Some(SAFE_XCM_VERSION),
+		},
+		"ethereumSystem": EthereumSystemConfig {
+			para_id: id,
+			asset_hub_para_id: kusama_runtime_constants::system_parachain::ASSET_HUB_ID.into(),
+			..Default::default()
+		},
+		// no need to pass anything to aura, in fact it will panic if we do. Session will take care
+		// of this. `aura: Default::default()`
+	})
+}
+
+fn bridge_hub_kusama_local_testnet_genesis(para_id: ParaId) -> serde_json::Value {
+	bridge_hub_kusama_genesis(invulnerables(), testnet_accounts(), para_id)
+}
+
+fn bridge_hub_kusama_development_genesis(para_id: ParaId) -> serde_json::Value {
+	bridge_hub_kusama_local_testnet_genesis(para_id)
+}
+
+/// Provides the JSON representation of predefined genesis config for given `id`.
+pub fn get_preset(id: &sp_genesis_builder::PresetId) -> Option<sp_std::vec::Vec<u8>> {
+	let patch = match id.try_into() {
+		Ok("development") => bridge_hub_kusama_development_genesis(1002.into()),
+		Ok("local_testnet") => bridge_hub_kusama_local_testnet_genesis(1002.into()),
+		_ => return None,
+	};
+	Some(
+		serde_json::to_string(&patch)
+			.expect("serialization to json is expected to work. qed.")
+			.into_bytes(),
+	)
+}

system-parachains/bridge-hubs/bridge-hub-kusama/src/lib.rs

@@ -24,6 +24,7 @@ include!(concat!(env!("OUT_DIR"), "/wasm_binary.rs"));
 
 pub mod bridge_to_ethereum_config;
 pub mod bridge_to_polkadot_config;
+mod genesis_config_presets;
 mod weights;
 pub mod xcm_config;
 
@@ -751,11 +752,14 @@ impl_runtime_apis! {
 		}
 
 		fn get_preset(id: &Option<sp_genesis_builder::PresetId>) -> Option<Vec<u8>> {
-			get_preset::<RuntimeGenesisConfig>(id, |_| None)
+			get_preset::<RuntimeGenesisConfig>(id, &genesis_config_presets::get_preset)
 		}
 
 		fn preset_names() -> Vec<sp_genesis_builder::PresetId> {
-			vec![]
+			vec![
+				sp_genesis_builder::PresetId::from("local_testnet"),
+				sp_genesis_builder::PresetId::from("development"),
+			]
 		}
 	}
 

system-parachains/constants/Cargo.toml

@@ -16,7 +16,10 @@ parachains-common = { workspace = true }
 polkadot-core-primitives = { workspace = true }
 polkadot-primitives = { workspace = true }
 polkadot-runtime-constants = { workspace = true }
+sp-core = { workspace = true }
 sp-runtime = { workspace = true }
+sp-std = { workspace = true }
+xcm = { workspace = true }
 
 [features]
 default = ["std"]
@@ -27,5 +30,8 @@ std = [
 	"polkadot-core-primitives/std",
 	"polkadot-primitives/std",
 	"polkadot-runtime-constants/std",
+	"sp-core/std",
 	"sp-runtime/std",
+	"sp-std/std",
+	"xcm/std",
 ]

system-parachains/constants/src/genesis_presets.rs

@@ -0,0 +1,68 @@
+// Copyright (C) Parity Technologies and the various Polkadot contributors, see Contributions.md
+// for a list of specific contributors.
+// 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/>.
+
+use parachains_common::AuraId;
+use polkadot_primitives::{AccountId, AccountPublic};
+use sp_core::{sr25519, Pair, Public};
+use sp_runtime::traits::IdentifyAccount;
+#[cfg(not(feature = "std"))]
+use sp_std::alloc::format;
+use sp_std::vec::Vec;
+
+/// Invulnerable Collators
+pub fn invulnerables() -> Vec<(parachains_common::AccountId, AuraId)> {
+	Vec::from([
+		(get_account_id_from_seed::<sr25519::Public>("Alice"), get_from_seed::<AuraId>("Alice")),
+		(get_account_id_from_seed::<sr25519::Public>("Bob"), get_from_seed::<AuraId>("Bob")),
+	])
+}
+
+/// Test accounts
+pub fn testnet_accounts() -> Vec<AccountId> {
+	Vec::from([
+		get_account_id_from_seed::<sr25519::Public>("Alice"),
+		get_account_id_from_seed::<sr25519::Public>("Bob"),
+		get_account_id_from_seed::<sr25519::Public>("Charlie"),
+		get_account_id_from_seed::<sr25519::Public>("Dave"),
+		get_account_id_from_seed::<sr25519::Public>("Eve"),
+		get_account_id_from_seed::<sr25519::Public>("Ferdie"),
+		get_account_id_from_seed::<sr25519::Public>("Alice//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Bob//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Charlie//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Dave//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Eve//stash"),
+		get_account_id_from_seed::<sr25519::Public>("Ferdie//stash"),
+	])
+}
+
+/// Helper function to generate a crypto pair from seed
+pub fn get_from_seed<TPublic: Public>(seed: &str) -> <TPublic::Pair as Pair>::Public {
+	TPublic::Pair::from_string(&format!("//{}", seed), None)
+		.expect("static values are valid; qed")
+		.public()
+}
+
+/// Helper function to generate an account ID from seed
+pub fn get_account_id_from_seed<TPublic: Public>(seed: &str) -> AccountId
+where
+	AccountPublic: From<<TPublic::Pair as Pair>::Public>,
+{
+	AccountPublic::from(get_from_seed::<TPublic>(seed)).into_account()
+}
+
+/// The default XCM version to set in genesis config.
+pub const SAFE_XCM_VERSION: u32 = xcm::prelude::XCM_VERSION;

system-parachains/constants/src/lib.rs

@@ -16,6 +16,7 @@
 
 #![cfg_attr(not(feature = "std"), no_std)]
 
+pub mod genesis_presets;
 pub mod kusama;
 pub mod polkadot;