beacon/engine: omit null witness field from payload envelope (#30597)

## Description Omit null `witness` field from payload envelope. ## Motivation Currently, JSON encoded payload types always include `"witness": null`, which, I believe, is not intentional.
ethereum · Oct 15, 2024 · 4c4219e · 4c4219e
1 parent 30ce173
commit 4c4219e
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diff --git a/beacon/engine/gen_epe.go b/beacon/engine/gen_epe.go
diff --git a/beacon/engine/types.go b/beacon/engine/types.go
@@ -109,7 +109,7 @@ type ExecutionPayloadEnvelope struct {
 	BlobsBundle      *BlobsBundleV1  `json:"blobsBundle"`
 	Requests         [][]byte        `json:"executionRequests"`
 	Override         bool            `json:"shouldOverrideBuilder"`
-	Witness          *hexutil.Bytes  `json:"witness"`
+	Witness          *hexutil.Bytes  `json:"witness,omitempty"`
 }
 
 type BlobsBundleV1 struct {