lib.rs

		fn mmr_leaf_count() -> Result<mmr::LeafIndex, mmr::Error> {
			Ok(Mmr::mmr_leaves())
		}

		fn generate_proof(
			block_numbers: Vec<BlockNumber>,
			best_known_block_number: Option<BlockNumber>,
		) -> Result<(Vec<mmr::EncodableOpaqueLeaf>, mmr::Proof<mmr::Hash>), mmr::Error> {
			Mmr::generate_proof(block_numbers, best_known_block_number).map(
				|(leaves, proof)| {
					(
						leaves
							.into_iter()
							.map(|leaf| mmr::EncodableOpaqueLeaf::from_leaf(&leaf))
							.collect(),
						proof,
					)
				},
			)
		}

		fn verify_proof(leaves: Vec<mmr::EncodableOpaqueLeaf>, proof: mmr::Proof<mmr::Hash>)
			-> Result<(), mmr::Error>
		{
			let leaves = leaves.into_iter().map(|leaf|
				leaf.into_opaque_leaf()
				.try_decode()
				.ok_or(mmr::Error::Verify)).collect::<Result<Vec<mmr::Leaf>, mmr::Error>>()?;
			Mmr::verify_leaves(leaves, proof)
		}

		fn verify_proof_stateless(
			root: mmr::Hash,
			leaves: Vec<mmr::EncodableOpaqueLeaf>,
			proof: mmr::Proof<mmr::Hash>
		) -> Result<(), mmr::Error> {
			let nodes = leaves.into_iter().map(|leaf|mmr::DataOrHash::Data(leaf.into_opaque_leaf())).collect();
			pallet_mmr::verify_leaves_proof::<mmr::Hashing, _>(root, nodes, proof)
		}
	}

	impl fg_primitives::GrandpaApi<Block> for Runtime {
		fn grandpa_authorities() -> Vec<(GrandpaId, u64)> {
			Grandpa::grandpa_authorities()
		}

		fn current_set_id() -> fg_primitives::SetId {
			Grandpa::current_set_id()
		}

		fn submit_report_equivocation_unsigned_extrinsic(
			equivocation_proof: fg_primitives::EquivocationProof<
				<Block as BlockT>::Hash,
				sp_runtime::traits::NumberFor<Block>,
			>,
			key_owner_proof: fg_primitives::OpaqueKeyOwnershipProof,
		) -> Option<()> {
			let key_owner_proof = key_owner_proof.decode()?;

			Grandpa::submit_unsigned_equivocation_report(
				equivocation_proof,
				key_owner_proof,
			)
		}

		fn generate_key_ownership_proof(
			_set_id: fg_primitives::SetId,
			authority_id: fg_primitives::AuthorityId,
		) -> Option<fg_primitives::OpaqueKeyOwnershipProof> {
			use parity_scale_codec::Encode;

			Historical::prove((fg_primitives::KEY_TYPE, authority_id))
				.map(|p| p.encode())
				.map(fg_primitives::OpaqueKeyOwnershipProof::new)
		}
	}

	impl babe_primitives::BabeApi<Block> for Runtime {
		fn configuration() -> babe_primitives::BabeConfiguration {
			let epoch_config = Babe::epoch_config().unwrap_or(BABE_GENESIS_EPOCH_CONFIG);
			babe_primitives::BabeConfiguration {
				slot_duration: Babe::slot_duration(),
				epoch_length: EpochDurationInBlocks::get().into(),
				c: epoch_config.c,
				authorities: Babe::authorities().to_vec(),
				randomness: Babe::randomness(),
				allowed_slots: epoch_config.allowed_slots,
			}
		}

		fn current_epoch_start() -> babe_primitives::Slot {
			Babe::current_epoch_start()
		}

		fn current_epoch() -> babe_primitives::Epoch {
			Babe::current_epoch()
		}

		fn next_epoch() -> babe_primitives::Epoch {
			Babe::next_epoch()
		}

		fn generate_key_ownership_proof(
			_slot: babe_primitives::Slot,
			authority_id: babe_primitives::AuthorityId,
		) -> Option<babe_primitives::OpaqueKeyOwnershipProof> {
			use parity_scale_codec::Encode;

			Historical::prove((babe_primitives::KEY_TYPE, authority_id))
				.map(|p| p.encode())
				.map(babe_primitives::OpaqueKeyOwnershipProof::new)
		}

		fn submit_report_equivocation_unsigned_extrinsic(
			equivocation_proof: babe_primitives::EquivocationProof<<Block as BlockT>::Header>,
			key_owner_proof: babe_primitives::OpaqueKeyOwnershipProof,
		) -> Option<()> {
			let key_owner_proof = key_owner_proof.decode()?;

			Babe::submit_unsigned_equivocation_report(
				equivocation_proof,
				key_owner_proof,
			)
		}
	}

	impl authority_discovery_primitives::AuthorityDiscoveryApi<Block> for Runtime {
		fn authorities() -> Vec<AuthorityDiscoveryId> {
			parachains_runtime_api_impl::relevant_authority_ids::<Runtime>()
		}
	}

	impl sp_session::SessionKeys<Block> for Runtime {
		fn generate_session_keys(seed: Option<Vec<u8>>) -> Vec<u8> {
			SessionKeys::generate(seed)
		}

		fn decode_session_keys(
			encoded: Vec<u8>,
		) -> Option<Vec<(Vec<u8>, sp_core::crypto::KeyTypeId)>> {
			SessionKeys::decode_into_raw_public_keys(&encoded)
		}
	}

	impl frame_system_rpc_runtime_api::AccountNonceApi<Block, AccountId, Nonce> for Runtime {
		fn account_nonce(account: AccountId) -> Nonce {
			System::account_nonce(account)
		}
	}

	impl pallet_transaction_payment_rpc_runtime_api::TransactionPaymentApi<
		Block,
		Balance,
	> for Runtime {
		fn query_info(uxt: <Block as BlockT>::Extrinsic, len: u32) -> RuntimeDispatchInfo<Balance> {
			TransactionPayment::query_info(uxt, len)
		}
		fn query_fee_details(uxt: <Block as BlockT>::Extrinsic, len: u32) -> FeeDetails<Balance> {
			TransactionPayment::query_fee_details(uxt, len)
		}
		fn query_weight_to_fee(weight: Weight) -> Balance {
			TransactionPayment::weight_to_fee(weight)
		}
		fn query_length_to_fee(length: u32) -> Balance {
			TransactionPayment::length_to_fee(length)
		}
	}

	impl pallet_beefy_mmr::BeefyMmrApi<Block, Hash> for RuntimeApi {
		fn authority_set_proof() -> beefy_primitives::mmr::BeefyAuthoritySet<Hash> {
			MmrLeaf::authority_set_proof()
		}

		fn next_authority_set_proof() -> beefy_primitives::mmr::BeefyNextAuthoritySet<Hash> {
			MmrLeaf::next_authority_set_proof()
		}
	}

	#[cfg(feature = "try-runtime")]
	impl frame_try_runtime::TryRuntime<Block> for Runtime {
		fn on_runtime_upgrade(checks: frame_try_runtime::UpgradeCheckSelect) -> (Weight, Weight) {
			log::info!("try-runtime::on_runtime_upgrade rococo.");
			let weight = Executive::try_runtime_upgrade(checks).unwrap();
			(weight, BlockWeights::get().max_block)
		}

		fn execute_block(
			block: Block,
			state_root_check: bool,
			signature_check: bool,
			select: frame_try_runtime::TryStateSelect,
		) -> Weight {
			// NOTE: intentional unwrap: we don't want to propagate the error backwards, and want to
			// have a backtrace here.
			Executive::try_execute_block(block, state_root_check, signature_check, select).unwrap()
		}
	}

	#[cfg(feature = "runtime-benchmarks")]
	impl frame_benchmarking::Benchmark<Block> for Runtime {
		fn benchmark_metadata(extra: bool) -> (
			Vec<frame_benchmarking::BenchmarkList>,
			Vec<frame_support::traits::StorageInfo>,
		) {
			use frame_benchmarking::{Benchmarking, BenchmarkList};
			use frame_support::traits::StorageInfoTrait;

			use frame_system_benchmarking::Pallet as SystemBench;
			use frame_benchmarking::baseline::Pallet as Baseline;

			use pallet_xcm::benchmarking::Pallet as PalletXcmExtrinsicsBenchmark;

			let mut list = Vec::<BenchmarkList>::new();
			list_benchmarks!(list, extra);

			let storage_info = AllPalletsWithSystem::storage_info();
			return (list, storage_info)
		}

		fn dispatch_benchmark(
			config: frame_benchmarking::BenchmarkConfig,
		) -> Result<
			Vec<frame_benchmarking::BenchmarkBatch>,
			sp_runtime::RuntimeString,
		> {
			use frame_support::traits::WhitelistedStorageKeys;
			use frame_benchmarking::{Benchmarking, BenchmarkBatch, BenchmarkError};
			use frame_system_benchmarking::Pallet as SystemBench;
			use frame_benchmarking::baseline::Pallet as Baseline;
			use pallet_xcm::benchmarking::Pallet as PalletXcmExtrinsicsBenchmark;
			use sp_storage::TrackedStorageKey;
			use xcm::latest::prelude::*;
			use xcm_config::{
				AssetHub, LocalCheckAccount, LocationConverter, TokenLocation, XcmConfig,
			};

			parameter_types! {
				pub ExistentialDepositMultiAsset: Option<MultiAsset> = Some((
					TokenLocation::get(),
					ExistentialDeposit::get()
				).into());
				pub ToParachain: ParaId = rococo_runtime_constants::system_parachain::ASSET_HUB_ID.into();
			}

			impl frame_system_benchmarking::Config for Runtime {}
			impl frame_benchmarking::baseline::Config for Runtime {}
			impl pallet_xcm::benchmarking::Config for Runtime {
				fn reachable_dest() -> Option<MultiLocation> {
					Some(crate::xcm_config::AssetHub::get())
				}

				fn teleportable_asset_and_dest() -> Option<(MultiAsset, MultiLocation)> {
					// Relay/native token can be teleported to/from AH.
					Some((
						MultiAsset {
							fun: Fungible(EXISTENTIAL_DEPOSIT),
							id: Concrete(Here.into())
						},
						crate::xcm_config::AssetHub::get(),
					))
				}

				fn reserve_transferable_asset_and_dest() -> Option<(MultiAsset, MultiLocation)> {
					// Relay can reserve transfer native token to some random parachain.
					Some((
						MultiAsset {
							fun: Fungible(EXISTENTIAL_DEPOSIT),
							id: Concrete(Here.into())
						},
						Parachain(43211234).into(),
					))
				}
			}
			impl pallet_xcm_benchmarks::Config for Runtime {
				type XcmConfig = XcmConfig;
				type AccountIdConverter = LocationConverter;
				type DeliveryHelper = runtime_common::xcm_sender::ToParachainDeliveryHelper<
					XcmConfig,
					ExistentialDepositMultiAsset,
					xcm_config::PriceForChildParachainDelivery,
					ToParachain,
					(),
				>;
				fn valid_destination() -> Result<MultiLocation, BenchmarkError> {
					Ok(AssetHub::get())
				}
				fn worst_case_holding(_depositable_count: u32) -> MultiAssets {
					// Rococo only knows about ROC
					vec![MultiAsset{
						id: Concrete(TokenLocation::get()),
						fun: Fungible(1_000_000 * UNITS),
					}].into()
				}
			}

			parameter_types! {
				pub const TrustedTeleporter: Option<(MultiLocation, MultiAsset)> = Some((
					AssetHub::get(),
					MultiAsset { fun: Fungible(1 * UNITS), id: Concrete(TokenLocation::get()) },
				));
				pub const TrustedReserve: Option<(MultiLocation, MultiAsset)> = None;
			}

			impl pallet_xcm_benchmarks::fungible::Config for Runtime {
				type TransactAsset = Balances;

				type CheckedAccount = LocalCheckAccount;
				type TrustedTeleporter = TrustedTeleporter;
				type TrustedReserve = TrustedReserve;

				fn get_multi_asset() -> MultiAsset {
					MultiAsset {
						id: Concrete(TokenLocation::get()),
						fun: Fungible(1 * UNITS),
					}
				}
			}

			impl pallet_xcm_benchmarks::generic::Config for Runtime {
				type TransactAsset = Balances;
				type RuntimeCall = RuntimeCall;

				fn worst_case_response() -> (u64, Response) {
					(0u64, Response::Version(Default::default()))
				}

				fn worst_case_asset_exchange() -> Result<(MultiAssets, MultiAssets), BenchmarkError> {
					// Rococo doesn't support asset exchanges
					Err(BenchmarkError::Skip)
				}

				fn universal_alias() -> Result<(MultiLocation, Junction), BenchmarkError> {
					// The XCM executor of Rococo doesn't have a configured `UniversalAliases`
					Err(BenchmarkError::Skip)
				}

				fn transact_origin_and_runtime_call() -> Result<(MultiLocation, RuntimeCall), BenchmarkError> {
					Ok((AssetHub::get(), frame_system::Call::remark_with_event { remark: vec![] }.into()))
				}

				fn subscribe_origin() -> Result<MultiLocation, BenchmarkError> {
					Ok(AssetHub::get())
				}

				fn claimable_asset() -> Result<(MultiLocation, MultiLocation, MultiAssets), BenchmarkError> {
					let origin = AssetHub::get();
					let assets: MultiAssets = (Concrete(TokenLocation::get()), 1_000 * UNITS).into();
					let ticket = MultiLocation { parents: 0, interior: Here };
					Ok((origin, ticket, assets))
				}

				fn unlockable_asset() -> Result<(MultiLocation, MultiLocation, MultiAsset), BenchmarkError> {
					// Rococo doesn't support asset locking
					Err(BenchmarkError::Skip)
				}

				fn export_message_origin_and_destination(
				) -> Result<(MultiLocation, NetworkId, InteriorMultiLocation), BenchmarkError> {
					// Rococo doesn't support exporting messages
					Err(BenchmarkError::Skip)
				}

				fn alias_origin() -> Result<(MultiLocation, MultiLocation), BenchmarkError> {
					// The XCM executor of Rococo doesn't have a configured `Aliasers`
					Err(BenchmarkError::Skip)
				}
			}

			let mut whitelist: Vec<TrackedStorageKey> = AllPalletsWithSystem::whitelisted_storage_keys();
			let treasury_key = frame_system::Account::<Runtime>::hashed_key_for(Treasury::account_id());
			whitelist.push(treasury_key.to_vec().into());

			let mut batches = Vec::<BenchmarkBatch>::new();
			let params = (&config, &whitelist);

			add_benchmarks!(params, batches);

			Ok(batches)
		}
	}

	impl sp_genesis_builder::GenesisBuilder<Block> for Runtime {
		fn create_default_config() -> Vec<u8> {
			create_default_config::<RuntimeGenesisConfig>()
		}

		fn build_config(config: Vec<u8>) -> sp_genesis_builder::Result {
			build_config::<RuntimeGenesisConfig>(config)
		}
	}
}

#[cfg(all(test, feature = "try-runtime"))]
mod remote_tests {
	use super::*;
	use frame_try_runtime::{runtime_decl_for_try_runtime::TryRuntime, UpgradeCheckSelect};
	use remote_externalities::{
		Builder, Mode, OfflineConfig, OnlineConfig, SnapshotConfig, Transport,
	};
	use std::env::var;

	#[tokio::test]
	async fn run_migrations() {
		if var("RUN_MIGRATION_TESTS").is_err() {
			return
		}

		sp_tracing::try_init_simple();
		let transport: Transport =
			var("WS").unwrap_or("wss://rococo-rpc.polkadot.io:443".to_string()).into();
		let maybe_state_snapshot: Option<SnapshotConfig> = var("SNAP").map(|s| s.into()).ok();
		let mut ext = Builder::<Block>::default()
			.mode(if let Some(state_snapshot) = maybe_state_snapshot {
				Mode::OfflineOrElseOnline(
					OfflineConfig { state_snapshot: state_snapshot.clone() },
					OnlineConfig {
						transport,
						state_snapshot: Some(state_snapshot),
						..Default::default()
					},
				)
			} else {
				Mode::Online(OnlineConfig { transport, ..Default::default() })
			})
			.build()
			.await
			.unwrap();
		ext.execute_with(|| Runtime::on_runtime_upgrade(UpgradeCheckSelect::PreAndPost));
	}
}