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Refactor Beefy MMR and remove parachain specific implementations (#10664)

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* refactor beefy mmr

* use plain vector of bytes for leaf extra

* update comment

* update comments

* remove unused vars

* Use sp_std::vec::Vec

Co-authored-by: Adrian Catangiu <adrian@parity.io>

* make extra data generic

* fix tests

* refactor beefy-mmr

* Update frame/beefy-mmr/src/lib.rs

* minor fix

* fmt

* Update frame/beefy-mmr/src/lib.rs

Co-authored-by: Adrian Catangiu <adrian@parity.io>
This commit is contained in:
David Salami
2022-04-01 09:50:11 +01:00
committed by GitHub
parent c2d3d488b8
commit 2d3ee74805
4 changed files with 52 additions and 65 deletions
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substrate/primitives/beefy/src/mmr.rs
+18 -3
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@@ -26,12 +26,26 @@
//! but we imagine they will be useful for other chains that either want to bridge with Polkadot
//! or are completely standalone, but heavily inspired by Polkadot.
use crate::Vec;
use codec::{Decode, Encode, MaxEncodedLen};
use scale_info::TypeInfo;
/// A provider for extra data that gets added to the Mmr leaf
pub trait BeefyDataProvider<ExtraData> {
/// Return a vector of bytes, ideally should be a merkle root hash
fn extra_data() -> ExtraData;
}
/// A default implementation for runtimes.
impl BeefyDataProvider<Vec<u8>> for () {
fn extra_data() -> Vec<u8> {
Vec::new()
}
}
/// A standard leaf that gets added every block to the MMR constructed by Substrate's `pallet_mmr`.
#[derive(Debug, PartialEq, Eq, Clone, Encode, Decode)]
pub struct MmrLeaf<BlockNumber, Hash, MerkleRoot> {
pub struct MmrLeaf<BlockNumber, Hash, MerkleRoot, ExtraData> {
/// Version of the leaf format.
///
/// Can be used to enable future format migrations and compatibility.
@@ -41,8 +55,9 @@ pub struct MmrLeaf<BlockNumber, Hash, MerkleRoot> {
pub parent_number_and_hash: (BlockNumber, Hash),
/// A merkle root of the next BEEFY authority set.
pub beefy_next_authority_set: BeefyNextAuthoritySet<MerkleRoot>,
/// A merkle root of all registered parachain heads.
pub parachain_heads: MerkleRoot,
/// Arbitrary extra leaf data to be used by downstream pallets to include custom data in the
/// [`MmrLeaf`]
pub leaf_extra: ExtraData,
}
/// A MMR leaf versioning scheme.