execution,cl: add TargetGasLimit to PayloadAttributesV4#21297
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Pull request overview
Adds support for the Amsterdam/Gloas PayloadAttributesV4.targetGasLimit field (per execution-apis/pull/796) and wires it through Erigon’s Engine API + block builder so a CL-provided gas target can override the EL’s static --miner.gaslimit when building blocks.
Changes:
- Plumbs
TargetGasLimitfrom Engine API payload attributes intobuilder.Parametersand uses it during header construction. - Extends SSZ + JSON-RPC payload attributes schemas to carry
targetGasLimit, and updates test/mock CL paths to populate it. - Adds an Engine API test ensuring CL
targetGasLimitoverrides the EL configured gas limit for block building.
Reviewed changes
Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.
Show a summary per file
| File | Description |
|---|---|
| execution/execmodule/chainreader/chain_reader.go | Passes TargetGasLimit into builder.Parameters for assembling blocks. |
| execution/engineapi/testing_api.go | Propagates TargetGasLimit into builder params in the testing API path. |
| execution/engineapi/sszrest_test.go | Extends SSZ REST forkchoice test to include TargetGasLimit. |
| execution/engineapi/engineapitester/mock_cl.go | Mock CL now supplies TargetGasLimit for Amsterdam builds. |
| execution/engineapi/engine_types/ssz.go | SSZ encode/decode updated to include TargetGasLimit for Gloas attrs. |
| execution/engineapi/engine_types/jsonrpc.go | Adds targetGasLimit field to JSON-RPC PayloadAttributes. |
| execution/engineapi/engine_server.go | For FCU builds, passes TargetGasLimit into builder params; TODO’d validation for requirement. |
| execution/engineapi/engine_api_builder_test.go | New test proving CL targetGasLimit overrides EL --miner.gaslimit. |
| execution/builder/parameters.go | Adds TargetGasLimit to builder parameters struct. |
| execution/builder/create_block.go | Uses CL TargetGasLimit (when present) as the gas target instead of static config. |
| cl/phase1/stages/forkchoice.go | CL event emission now includes TargetGasLimit for Gloas+. |
| cl/beacon/handler/block_production.go | CL block production path sets TargetGasLimit for Gloas+. |
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for ethereum/execution-apis#796 in
glamsterdam-devnet-4