Add Engine API method stubs for the Amsterdam fork (Gloas on CL side):
- engine_newPayloadV5 for Amsterdam payloads
- engine_getPayloadV6 for Amsterdam payloads
- engine_newPayloadWithWitnessV5 for witness generation
- engine_executeStatelessPayloadV5 for stateless execution
- Update engine_forkchoiceUpdatedV3 to accept Amsterdam payloads
- Add PayloadV4 constant for ExecutionPayloadV4
This is a minimal implementation with method stubs only - no blockAccessList
(EIP-7928) integration yet.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Addresses https://github.com/ethereum/go-ethereum/issues/32630
This pull request enables the stateless engine APIs for Osaka and the
following BPOs. Apart from that, a few more descriptions have been added
in the engine APIs, making it easier to follow the spec change.
Correct the error message in the ExecuteStatelessPayloadV4 function to
reference newPayloadV4 and the Prague fork, instead of incorrectly
referencing newPayloadV3 and Cancun.
This improves clarity during debugging and aligns the error message with
the actual function and fork being validated. No logic is changed.
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Co-authored-by: rjl493456442 <garyrong0905@gmail.com>
