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expose the last relay chain block number as an API from parachain-system #1761

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merged 3 commits into from
Oct 3, 2023
Merged

expose the last relay chain block number as an API from parachain-system #1761

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63ed441
expose the last relay chain block number as an API from parachain-system
rphmeier Sep 29, 2023
8c97b0c
fmt
rphmeier Sep 29, 2023
e949277
remove getter
rphmeier Oct 2, 2023
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23 changes: 16 additions & 7 deletions cumulus/pallets/parachain-system/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -245,10 +245,10 @@ pub mod pallet {
<UpgradeRestrictionSignal<T>>::kill();
let relay_upgrade_go_ahead = <UpgradeGoAhead<T>>::take();

assert!(
<ValidationData<T>>::exists(),
"set_validation_data inherent needs to be present in every block!"
);
let vfp = <ValidationData<T>>::get()
.expect("set_validation_data inherent needs to be present in every block!");

LastRelayChainBlockNumber::<T>::put(vfp.relay_parent_number);

let host_config = match Self::host_configuration() {
Some(ok) => ok,
Expand Down Expand Up @@ -380,8 +380,7 @@ pub mod pallet {
let ancestor = Ancestor::new_unchecked(used_bandwidth, consumed_go_ahead_signal);

let watermark = HrmpWatermark::<T>::get();
let watermark_update =
HrmpWatermarkUpdate::new(watermark, LastRelayChainBlockNumber::<T>::get());
let watermark_update = HrmpWatermarkUpdate::new(watermark, vfp.relay_parent_number);

aggregated_segment
.append(&ancestor, watermark_update, &total_bandwidth_out)
Expand Down Expand Up @@ -460,6 +459,9 @@ pub mod pallet {
4 + hrmp_max_message_num_per_candidate as u64,
);

// Weight for updating the last relay chain block number in `on_finalize`.
weight += T::DbWeight::get().reads_writes(1, 1);

// Weight for adjusting the unincluded segment in `on_finalize`.
weight += T::DbWeight::get().reads_writes(6, 3);

Expand Down Expand Up @@ -515,7 +517,6 @@ pub mod pallet {
vfp.relay_parent_number,
LastRelayChainBlockNumber::<T>::get(),
);
LastRelayChainBlockNumber::<T>::put(vfp.relay_parent_number);

let relay_state_proof = RelayChainStateProof::new(
T::SelfParaId::get(),
Expand Down Expand Up @@ -756,6 +757,8 @@ pub mod pallet {
pub(super) type DidSetValidationCode<T: Config> = StorageValue<_, bool, ValueQuery>;

/// The relay chain block number associated with the last parachain block.
///
/// This is updated in `on_finalize`.
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#[pallet::storage]
pub(super) type LastRelayChainBlockNumber<T: Config> =
StorageValue<_, RelayChainBlockNumber, ValueQuery>;
Expand Down Expand Up @@ -1501,6 +1504,12 @@ impl<T: Config> Pallet<T> {
Self::deposit_event(Event::UpwardMessageSent { message_hash: Some(hash) });
Ok((0, hash))
}

/// Get the relay chain block number which was used as an anchor for the last block in this
/// chain.
pub fn last_relay_block_number(&self) -> RelayChainBlockNumber {
LastRelayChainBlockNumber::<T>::get()
}
}

impl<T: Config> UpwardMessageSender for Pallet<T> {
Expand Down
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