fix linter

Author: tcoratger

packages/testing/src/consensus_testing/test_fixtures/fork_choice.py

@@ -312,7 +312,7 @@ def _build_block_from_spec(
             A complete signed block ready for processing.
         """
         # Determine proposer index
-        proposer_index = spec.proposer_index or ValidatorIndex(
+        proposer_index = spec.proposer_index or Uint64(
             int(spec.slot) % store.states[store.head].validators.count
         )
 

src/lean_spec/subspecs/containers/state/state.py

@@ -520,7 +520,7 @@ def state_transition(self, block: Block, valid_signatures: bool = True) -> "Stat
     def build_block(
         self,
         slot: Slot,
-        proposer_index: ValidatorIndex,
+        proposer_index: Uint64,
         parent_root: Bytes32,
         attestations: list[Attestation] | None = None,
     ) -> tuple[Block, "State"]: