Fix test

Author: terencechain

tests/core/pyspec/eth2spec/test/helpers/blob.py

@@ -150,13 +150,17 @@ def get_block_with_blob(spec, state, rng: Random | None = None, blob_count=1):
         )
         kzg_root = blob_kzg_commitments.hash_tree_root()
         block.body.signed_execution_payload_header.message.blob_kzg_commitments_root = kzg_root
-        block.body.signed_execution_payload_header.signature = (
-            spec.get_execution_payload_header_signature(
-                state,
-                block.body.signed_execution_payload_header.message,
-                privkeys[block.body.signed_execution_payload_header.message.builder_index],
+        # For self-builds, use point at infinity signature as per spec
+        if block.body.signed_execution_payload_header.message.builder_index == block.proposer_index:
+            block.body.signed_execution_payload_header.signature = spec.G2_POINT_AT_INFINITY
+        else:
+            block.body.signed_execution_payload_header.signature = (
+                spec.get_execution_payload_header_signature(
+                    state,
+                    block.body.signed_execution_payload_header.message,
+                    privkeys[block.body.signed_execution_payload_header.message.builder_index],
+                )
             )
-        )
     else:
         block.body.execution_payload.transactions = [opaque_tx]
         block.body.execution_payload.block_hash = compute_el_block_hash(

tests/core/pyspec/eth2spec/test/helpers/execution_payload.py

@@ -297,8 +297,15 @@ def build_empty_signed_execution_payload_header(spec, state):
     if not is_post_gloas(spec):
         return
     message = build_empty_post_gloas_execution_payload_header(spec, state)
-    privkey = privkeys[message.builder_index]
-    signature = spec.get_execution_payload_header_signature(state, message, privkey)
+    proposer_index = spec.get_beacon_proposer_index(state)
+
+    # For self-builds, use point at infinity signature as per spec
+    if message.builder_index == proposer_index:
+        signature = spec.G2_POINT_AT_INFINITY
+    else:
+        privkey = privkeys[message.builder_index]
+        signature = spec.get_execution_payload_header_signature(state, message, privkey)
+
     return spec.SignedExecutionPayloadHeader(
         message=message,
         signature=signature,