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Define HeaderIdProvider trait

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Define HeaderIdProvider trait

Signed-off-by: Serban Iorga <serban@parity.io>
This commit is contained in:
Serban Iorga
2022-07-14 17:49:18 +03:00
committed by Bastian Köcher
parent 2b03f4e9e9
commit dc38e3d079
7 changed files with 47 additions and 26 deletions
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bridges/primitives/runtime/src/lib.rs
+23 -1
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@@ -26,7 +26,7 @@ use frame_system::RawOrigin;
use scale_info::TypeInfo;
use sp_core::{hash::H256, storage::StorageKey};
use sp_io::hashing::blake2_256;
use sp_runtime::traits::BadOrigin;
use sp_runtime::traits::{BadOrigin, Header as HeaderT};
use sp_std::{convert::TryFrom, fmt::Debug, vec, vec::Vec};
pub use chain::{
@@ -34,6 +34,7 @@ pub use chain::{
HasherOf, HeaderOf, IndexOf, SignatureOf, TransactionEraOf,
};
pub use frame_support::storage::storage_prefix as storage_value_final_key;
use num_traits::{CheckedSub, One};
pub use storage_proof::{
Error as StorageProofError, ProofSize as StorageProofSize, StorageProofChecker,
};
@@ -83,6 +84,27 @@ pub const ROOT_ACCOUNT_DERIVATION_PREFIX: &[u8] = b"pallet-bridge/account-deriva
#[derive(RuntimeDebug, Default, Clone, Copy, Eq, Hash, PartialEq)]
pub struct HeaderId<Hash, Number>(pub Number, pub Hash);
/// Generic header id provider.
pub trait HeaderIdProvider<Header: HeaderT> {
// Get the header id.
fn id(&self) -> HeaderId<Header::Hash, Header::Number>;
// Get the header id for the parent block.
fn parent_id(&self) -> Option<HeaderId<Header::Hash, Header::Number>>;
}
impl<Header: HeaderT> HeaderIdProvider<Header> for Header {
fn id(&self) -> HeaderId<Header::Hash, Header::Number> {
HeaderId(*self.number(), self.hash())
}
fn parent_id(&self) -> Option<HeaderId<Header::Hash, Header::Number>> {
self.number()
.checked_sub(&One::one())
.map(|parent_number| HeaderId(parent_number, *self.parent_hash()))
}
}
/// Unique identifier of the chain.
///
/// In addition to its main function (identifying the chain), this type may also be used to