Apply suggestions from code review: Add ValidatorIndex

Co-Authored-By: ChihChengLiang <[email protected]>

Author: hwwhww

eth/beacon/types/exits.py

@@ -29,7 +29,7 @@ class Exit(rlp.Serializable):
 
     def __init__(self,
                  slot: SlotNumber,
-                 validator_index: int,
+                 validator_index: ValidatorIndex,
                  signature: BLSSignatureIntegers=EMPTY_SIGNATURE) -> None:
         super().__init__(
             slot,

eth/beacon/types/shard_committees.py

@@ -31,7 +31,7 @@ class ShardCommittee(rlp.Serializable):
 
     def __init__(self,
                  shard: ShardNumber,
-                 committee: Sequence[int],
+                 committee: Sequence[ValidatorIndex],
                  total_validator_count: int)-> None:
 
         super().__init__(

eth/beacon/types/shard_reassignment_records.py

@@ -24,7 +24,7 @@ class ShardReassignmentRecord(rlp.Serializable):
     ]
 
     def __init__(self,
-                 validator_index: int,
+                 validator_index: ValidatorIndex,
                  shard: ShardNumber,
                  slot: SlotNumber)-> None:
         super().__init__(

eth/beacon/types/states.py

@@ -99,7 +99,7 @@ def __init__(
             latest_randao_mixes: Sequence[Hash32]=(),
             latest_vdf_outputs: Sequence[Hash32]=(),
             shard_committees_at_slots: Sequence[Sequence[ShardCommittee]]=(),
-            persistent_committees: Sequence[Sequence[int]]=(),
+            persistent_committees: Sequence[Sequence[ValidatorIndex]]=(),
             persistent_committee_reassignments: Sequence[ShardReassignmentRecord]=(),
             latest_crosslinks: Sequence[CrosslinkRecord]=(),
             latest_block_roots: Sequence[Hash32]=(),

eth/beacon/types/validator_registry_delta_block.py

@@ -31,7 +31,7 @@ class ValidatorRegistryDeltaBlock(rlp.Serializable):
 
     def __init__(self,
                  latest_registry_delta_root: Hash32,
-                 validator_index: int,
+                 validator_index: ValidatorIndex,
                  pubkey: BLSPubkey,
                  flag: int) -> None:
         super().__init__(