Add executable gossip validation functions for phase0

pysetup/spec_builders/phase0.py

@@ -5,6 +5,17 @@
 class Phase0SpecBuilder(BaseSpecBuilder):
     fork: str = PHASE0
 
+    @classmethod
+    def classes(cls) -> str:
+        return """
+class GossipIgnore(Exception):
+    pass
+
+
+class GossipReject(Exception):
+    pass
+"""
+
     @classmethod
     def imports(cls, preset_name: str) -> str:
         return """from lru import LRU

tests/core/pyspec/eth_consensus_specs/test/helpers/gossip.py

@@ -0,0 +1,37 @@
+from eth_utils import encode_hex
+
+
+def get_seen(spec):
+    """Create an empty Seen object for gossip validation."""
+    return spec.Seen(
+        proposer_slots=set(),
+        aggregator_epochs=set(),
+        aggregate_data_roots={},
+        voluntary_exit_indices=set(),
+        proposer_slashing_indices=set(),
+        attester_slashing_indices=set(),
+        attestation_validator_epochs=set(),
+    )
+
+
+def get_filename(obj):
+    """Get a filename for an SSZ object based on its type."""
+    class_name = obj.__class__.__name__
+
+    # Map class names to filename prefixes
+    if "BeaconBlock" in class_name:
+        prefix = "block"
+    elif class_name == "Attestation":
+        prefix = "attestation"
+    elif "AggregateAndProof" in class_name:
+        prefix = "aggregate"
+    elif class_name == "ProposerSlashing":
+        prefix = "proposer_slashing"
+    elif class_name == "AttesterSlashing":
+        prefix = "attester_slashing"
+    elif "VoluntaryExit" in class_name:
+        prefix = "voluntary_exit"
+    else:
+        raise Exception(f"unsupported type: {class_name}")
+
+    return f"{prefix}_{encode_hex(obj.hash_tree_root())}"