Add Westend & Rococo primitives (#808)

* Move chain primitives to a sub-folder. * Update workspace members. * Extract core parts of polkadot. * cargo fmt --all * Remove TODO. * cargo fmt --all * Fix crate names. * Add to the latest API. * cargo fmt --all * Add nested lock files to ignore (generated during cargo fmt) * Fix compilation. * cargo fmt --all * Fix ignore pattern. * Address review comments.
2026-05-30 21:01:02 +00:00 · 2021-03-10 15:54:18 +01:00
parent 47aa6634a2
commit 84cd93f936
29 changed files with 706 additions and 387 deletions
@@ -0,0 +1,96 @@
+// 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/>.
+
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use bp_message_lane::MessageNonce;
+use bp_runtime::Chain;
+use frame_support::RuntimeDebug;
+use sp_core::Hasher as HasherT;
+use sp_runtime::{
+	generic,
+	traits::{BlakeTwo256, IdentifyAccount, Verify},
+	MultiSignature, OpaqueExtrinsic as UncheckedExtrinsic,
+};
+
+// Re-export's to avoid extra substrate dependencies in chain-specific crates.
+pub use frame_support::Parameter;
+pub use sp_runtime::traits::Convert;
+
+// TODO [#78] may need to be updated after https://github.com/paritytech/parity-bridges-common/issues/78
+/// Maximal number of messages in single delivery transaction.
+pub const MAX_MESSAGES_IN_DELIVERY_TRANSACTION: MessageNonce = 128;
+
+/// Maximal number of unrewarded relayer entries at inbound lane.
+pub const MAX_UNREWARDED_RELAYER_ENTRIES_AT_INBOUND_LANE: MessageNonce = 128;
+
+// TODO [#438] should be selected keeping in mind:
+// finality delay on both chains + reward payout cost + messages throughput.
+/// Maximal number of unconfirmed messages at inbound lane.
+pub const MAX_UNCONFIRMED_MESSAGES_AT_INBOUND_LANE: MessageNonce = 8192;
+
+/// Block number type used in Polkadot-like chains.
+pub type BlockNumber = u32;
+
+/// Hash type used in Polkadot-like chains.
+pub type Hash = <BlakeTwo256 as HasherT>::Out;
+
+/// The type of an object that can produce hashes on Polkadot-like chains.
+pub type Hasher = BlakeTwo256;
+
+/// The header type used by Polkadot-like chains.
+pub type Header = generic::Header<BlockNumber, Hasher>;
+
+/// Signature type used by Polkadot-like chains.
+pub type Signature = MultiSignature;
+
+/// Public key of account on Polkadot-like chains.
+pub type AccountPublic = <Signature as Verify>::Signer;
+
+/// Id of account on Polkadot-like chains.
+pub type AccountId = <AccountPublic as IdentifyAccount>::AccountId;
+
+/// Index of a transaction on the Polkadot-like chains.
+pub type Nonce = u32;
+
+/// Block type of Polkadot-like chains.
+pub type Block = generic::Block<Header, UncheckedExtrinsic>;
+
+/// Polkadot-like block signed with a Justification.
+pub type SignedBlock = generic::SignedBlock<Block>;
+
+/// The balance of an account on Polkadot-like chain.
+pub type Balance = u128;
+
+/// Polkadot-like chain.
+#[derive(RuntimeDebug)]
+pub struct PolkadotLike;
+
+impl Chain for PolkadotLike {
+	type BlockNumber = BlockNumber;
+	type Hash = Hash;
+	type Hasher = Hasher;
+	type Header = Header;
+}
+
+/// Convert a 256-bit hash into an AccountId.
+pub struct AccountIdConverter;
+
+impl Convert<sp_core::H256, AccountId> for AccountIdConverter {
+	fn convert(hash: sp_core::H256) -> AccountId {
+		hash.to_fixed_bytes().into()
+	}
+}