Implement Standalone Hyperbridge Proof Verification with EVM Log Emission Using Inherent #574
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seunlanlege
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Oct 28, 2025
| DigestItem::PreRuntime(consensus_engine_id, value) | ||
| if *consensus_engine_id == AURA_ENGINE_ID => | ||
| { | ||
| if let Ok(slot) = Slot::decode(&mut &value[..]) { |
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lets use the timestamp digest
Wizdave97
reviewed
Nov 4, 2025
| let topic_0_hash = keccak_256(b"StateMachineUpdated(bytes32,bytes)"); | ||
| let topic_0: H256 = H256::from(topic_0_hash); | ||
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| let topic_1_hash = keccak_256(b"hyperbridge_state_machine"); |
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Why do we need this second topic?
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i was thinking to tag it specifically as a hyperbridge state machine event, but yeah, seems redundant
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This PR introduces a dedicated system for verifying Hyperbridge parachain proofs submitted via inherents and subsequently emitting an EVM-compatible log through pallet-revive.
The primary goal is to provide a standalone mechanism for verifying Hyperbridge consensus updates directly within the runtime while maintaining compatibility with the relayers and indexer that expects EVM log events (specifically StateMachineUpdated). Existing ISMP mechanisms were deemed unsuitable as we needed this inherent and inherent handler to reside upstream (in Polkadot SDK) without depending on ISMP pallets.
Implementation Details:
hyperbridge-ismp-parachain:InherentHandlertrait that resides inpallet-revivefor processing system log message so as to emit EVM log events.hyperbridge-ismp-parachain-inherent:HyperbridgeVerifierApiruntime API trait to allow querying the runtime for theHyperbridgeParaIdandcurrent_relay_chain_state.HyperbridgeConsensusProofdata under theINHERENT_IDENTIFIER(b"hypbridg").companion
introduce inherent handler in pallet revive paritytech/polkadot-sdk#10140