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Introduce BlockWeightsForAsyncBacking and MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING to bridges primitives #2966

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Jan 18, 2024
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Introduce BlockWeightsForAsyncBacking and MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING to bridges primitives #2966

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Introduce `BlockWeightsForAsyncBacking` and `MAXIMUM_BLOCK_WEIGHT_FOR…
bkontur Jan 17, 2024
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bkontur Jan 17, 2024
ccea2e0
Update bridges/primitives/chain-bridge-hub-cumulus/src/lib.rs
bkontur Jan 17, 2024
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27 changes: 27 additions & 0 deletions bridges/primitives/chain-bridge-hub-cumulus/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,14 @@ const MAXIMUM_BLOCK_WEIGHT: Weight = Weight::from_parts(constants::WEIGHT_REF_TI
.saturating_div(2)
.set_proof_size(polkadot_primitives::MAX_POV_SIZE as u64);

/// We allow for 2 seconds of compute with a 6 second average block.
///
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/// This is a copy-paste of system parachain runtimes switched to async backing (https://github.com/paritytech/polkadot-sdk/pull/2949).
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const MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING: Weight = Weight::from_parts(
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This makes no sense? Either the runtime is running using async backing or not. This means you should update BlockWeights directly.

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Runtime's BlockWeights are updated directly in that #2949.

Here we try to keep bridges primitives in sync.
Bridges repo is partially migrated to the polkadot-sdk, the relayer part is missing, and we use these primitives for relayer code also (I will double-check if it is really needed now), that's the reason we have these "duplicite" copies. From time to time, we sync/backport bridges repo with polkadot-sdk.

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Hmm okay.

constants::WEIGHT_REF_TIME_PER_SECOND.saturating_mul(2),
polkadot_primitives::MAX_POV_SIZE as u64,
);

/// All cumulus bridge hubs assume that about 5 percent of the block weight is consumed by
/// `on_initialize` handlers. This is used to limit the maximal weight of a single extrinsic.
///
Expand Down Expand Up @@ -91,6 +99,25 @@ parameter_types! {
})
.avg_block_initialization(AVERAGE_ON_INITIALIZE_RATIO)
.build_or_panic();

pub BlockWeightsForAsyncBacking: limits::BlockWeights = limits::BlockWeights::builder()
.base_block(BlockExecutionWeight::get())
.for_class(DispatchClass::all(), |weights| {
weights.base_extrinsic = ExtrinsicBaseWeight::get();
})
.for_class(DispatchClass::Normal, |weights| {
weights.max_total = Some(NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING);
})
.for_class(DispatchClass::Operational, |weights| {
weights.max_total = Some(MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING);
// Operational transactions have an extra reserved space, so that they
// are included even if block reached `MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING`.
weights.reserved = Some(
MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING - NORMAL_DISPATCH_RATIO * MAXIMUM_BLOCK_WEIGHT_FOR_ASYNC_BACKING,
);
})
.avg_block_initialization(AVERAGE_ON_INITIALIZE_RATIO)
.build_or_panic();
}

/// Public key of the chain account that may be used to verify signatures.
Expand Down
2 changes: 1 addition & 1 deletion bridges/primitives/chain-bridge-hub-rococo/src/lib.rs
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Expand Up @@ -47,7 +47,7 @@ impl Chain for BridgeHubRococo {
}

fn max_extrinsic_weight() -> Weight {
BlockWeights::get()
BlockWeightsForAsyncBacking::get()
.get(DispatchClass::Normal)
.max_extrinsic
.unwrap_or(Weight::MAX)
Expand Down
2 changes: 1 addition & 1 deletion bridges/primitives/chain-bridge-hub-westend/src/lib.rs
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Expand Up @@ -47,7 +47,7 @@ impl Chain for BridgeHubWestend {
}

fn max_extrinsic_weight() -> Weight {
BlockWeights::get()
BlockWeightsForAsyncBacking::get()
.get(DispatchClass::Normal)
.max_extrinsic
.unwrap_or(Weight::MAX)
Expand Down
2 changes: 1 addition & 1 deletion cumulus/parachains/runtimes/bridge-hubs/bridge-hub-rococo/src/bridge_to_westend_config.rs
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Expand Up @@ -302,7 +302,7 @@ mod tests {
>(AssertCompleteBridgeConstants {
this_chain_constants: AssertChainConstants {
block_length: bp_bridge_hub_rococo::BlockLength::get(),
block_weights: bp_bridge_hub_rococo::BlockWeights::get(),
block_weights: bp_bridge_hub_rococo::BlockWeightsForAsyncBacking::get(),
},
messages_pallet_constants: AssertBridgeMessagesPalletConstants {
max_unrewarded_relayers_in_bridged_confirmation_tx:
Expand Down
2 changes: 1 addition & 1 deletion cumulus/parachains/runtimes/bridge-hubs/bridge-hub-westend/src/bridge_to_rococo_config.rs
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Expand Up @@ -337,7 +337,7 @@ mod tests {
>(AssertCompleteBridgeConstants {
this_chain_constants: AssertChainConstants {
block_length: bp_bridge_hub_westend::BlockLength::get(),
block_weights: bp_bridge_hub_westend::BlockWeights::get(),
block_weights: bp_bridge_hub_westend::BlockWeightsForAsyncBacking::get(),
},
messages_pallet_constants: AssertBridgeMessagesPalletConstants {
max_unrewarded_relayers_in_bridged_confirmation_tx:
Expand Down
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