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Follow-up on #1068 (#1567)

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* BestParaHead small changes

Signed-off-by: Serban Iorga <serban@parity.io>

* Renamings

Signed-off-by: Serban Iorga <serban@parity.io>

* Use ParaInfo in parachains loop

Signed-off-by: Serban Iorga <serban@parity.io>

* Define StorageMapKeyProvider

Signed-off-by: Serban Iorga <serban@parity.io>

* CR fixes

Signed-off-by: Serban Iorga <serban@parity.io>
This commit is contained in:
Serban Iorga
2022-09-05 13:13:31 +03:00
committed by Bastian Köcher
parent 1c94fbeafc
commit ad38cdb873
6 changed files with 190 additions and 113 deletions
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bridges/primitives/parachains/src/lib.rs
+19 -12
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@@ -22,7 +22,7 @@ use bp_polkadot_core::{
parachains::{ParaHash, ParaHead, ParaId},
BlockNumber as RelayBlockNumber,
};
use bp_runtime::StorageDoubleMapKeyProvider;
use bp_runtime::{StorageDoubleMapKeyProvider, StorageMapKeyProvider};
use codec::{Decode, Encode};
use frame_support::{Blake2_128Concat, RuntimeDebug, Twox64Concat};
use scale_info::TypeInfo;
@@ -44,6 +44,15 @@ pub struct BestParaHeadHash {
pub head_hash: ParaHash,
}
/// Best known parachain head as it is stored in the runtime storage.
#[derive(Decode, Encode, PartialEq, RuntimeDebug, TypeInfo)]
pub struct ParaInfo {
/// Best known parachain head hash.
pub best_head_hash: BestParaHeadHash,
/// Current ring buffer position for this parachain.
pub next_imported_hash_position: u32,
}
/// Returns runtime storage key of given parachain head at the source chain.
///
/// The head is stored by the `paras` pallet in the `Heads` map.
@@ -54,18 +63,16 @@ pub fn parachain_head_storage_key_at_source(
bp_runtime::storage_map_final_key::<Twox64Concat>(paras_pallet_name, "Heads", &para_id.encode())
}
/// Returns runtime storage key of best known parachain head at the target chain.
/// Can be use to access the runtime storage key of the parachains info at the target chain.
///
/// The head is stored by the `pallet-bridge-parachains` pallet in the `BestParaHeads` map.
pub fn best_parachain_head_hash_storage_key_at_target(
bridge_parachains_pallet_name: &str,
para_id: ParaId,
) -> StorageKey {
bp_runtime::storage_map_final_key::<Blake2_128Concat>(
bridge_parachains_pallet_name,
"BestParaHeads",
&para_id.encode(),
)
/// The info is stored by the `pallet-bridge-parachains` pallet in the `ParasInfo` map.
pub struct ParasInfoKeyProvider;
impl StorageMapKeyProvider for ParasInfoKeyProvider {
const MAP_NAME: &'static str = "ParasInfo";
type Hasher = Blake2_128Concat;
type Key = ParaId;
type Value = ParaInfo;
}
/// Can be use to access the runtime storage key of the parachain head at the target chain.