proposal: opt-in witness retrieval via flag on existing engine methods#799
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frisitano wants to merge 1 commit into
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proposal: opt-in witness retrieval via flag on existing engine methods#799frisitano wants to merge 1 commit into
frisitano wants to merge 1 commit into
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Adds src/engine/witness-retrieval.md describing an Engine API extension that allows the consensus layer to opt in to receiving the execution witness alongside the existing payload validation and payload production flows. Design summary: - engine_newPayloadV6: extends V5 with an optional `requestWitness` param and an optional `executionWitness` field on PayloadStatusV2. - engine_forkchoiceUpdatedV5: accepts PayloadAttributesV5, which adds a `requestWitness` field so the EL can configure witness collection before execution begins. - engine_getPayloadV7: response gains an optional `executionWitness`, populated when the originating FCU set `requestWitness = true`. - ExecutionWitnessV1: DATA representing SSZ-encoded witness bytes, following the on-wire convention of BlobV1. Container schema defined externally in a consensus-specs companion document. Offered as an alternative to the *WithWitness method approach (issue ethereum#741, PR ethereum#773). Rationale doc compares this against *WithWitness and notes composition with the SSZ-REST transport (PR ethereum#764).
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Adds src/engine/witness-retrieval.md describing an Engine API extension that allows the consensus layer to opt in to receiving the execution witness alongside the existing payload validation and payload production flows.
Design summary:
requestWitnessparam and an optionalexecutionWitnessfield on PayloadStatusV2.requestWitnessfield so the EL can configure witness collection before execution begins.executionWitness, populated when the originating FCU setrequestWitness = true.Offered as an alternative to the *WithWitness method approach (issue #741, PR #773). Rationale doc compares this against *WithWitness and notes composition with the SSZ-REST transport (PR #764).