fix(metering): pass parent_beacon_block_root for EIP-4788 compliance #482
+103
−10
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The `base_meterBundle` RPC was failing on Cancun-activated chains with "EIP-4788 parent beacon block root missing" because pending flashblock headers may omit the parent_beacon_block_root field. This adds explicit parameter passing from the flashblock base payload (CL-provided) to the meter_bundle function, falling back to the header value if available.
danyalprout
approved these changes
Jan 15, 2026
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Summary
base_meterBundleRPC failing with "EIP-4788 parent beacon block root missing"parent_beacon_block_rootparameter tometer_bundle()functionContext
Pending flashblock headers may omit the
parent_beacon_block_rootfield, but EIP-4788 requires this value for block execution. The fix prefers the CL-provided value from the flashblock base payload when available.Test plan
meter_bundle_requires_parent_beacon_block_rootverifies behavior with and without the rootCherry-pick of #481 for the v0.3.0 release.