feat: add block metering RPC endpoints #216
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Add base_meterBlockByHash and base_meterBlockByNumber RPC methods that re-execute a block and return timing metrics for EVM execution and state root calculation. - Add MeterBlockResponse and MeterBlockTransactions types - Rename meter module to bundle, add new block module for block metering - Include per-transaction timing and gas usage data
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🟡 Heimdall Review Status
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BrianBland
reviewed
Dec 3, 2025
Add unit tests for meter_block function and RPC tests for meterBlockByHash and meterBlockByNumber endpoints using TestHarness to build real blocks via the engine API. Also rename meter.rs to bundle.rs to match implementation structure.
Signer recovery can be parallelized, so it should be measured separately from EVM execution time. This adds signer_recovery_time_us to MeterBlockResponse and moves signer recovery before the execution loop.
Add notes about: - Pruned parent state will return an error - Older blocks may have slower state root calculation due to uncached trie nodes
Remove strict equality check for signer recovery time on empty blocks since timing overhead can result in non-zero values.
Instead of requiring the caller to pass a state provider and parent header separately, meter_block now accepts a provider that implements both StateProviderFactory and HeaderProvider. This allows the function to fetch the parent header and state internally, resulting in a cleaner API.
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Add base_meterBlockByHash and base_meterBlockByNumber RPC methods that re-execute a block and return timing metrics for EVM execution and state root calculation.