Make block_without_signature_root as property of Beacon Block

Author: Bhargavasomu

eth/beacon/state_machines/validation.py

@@ -28,7 +28,7 @@ def validate_proposer_signature(state: BeaconState,
                                 block: BaseBeaconBlock,
                                 beacon_chain_shard_number: int,
                                 epoch_length: int) -> None:
-    block_without_signature_root = BaseBeaconBlock.get_block_without_signature_root(block)
+    block_without_signature_root = block.block_without_signature_root
 
     # TODO: Replace this root with tree hash root
     proposal_root = ProposalSignedData(

eth/beacon/types/blocks.py

@@ -114,10 +114,8 @@ def root(self) -> Hash32:
     def num_attestations(self) -> int:
         return len(self.body.attestations)
 
-    @classmethod
-    def get_block_without_signature_root(
-            cls,
-            block: 'BaseBeaconBlock') -> Hash32:
-        return block.copy(
+    @property
+    def block_without_signature_root(self) -> Hash32:
+        return self.copy(
             signature=EMPTY_SIGNATURE
         ).root

tests/beacon/state_machines/test_validation.py

@@ -64,7 +64,7 @@ def test_validate_proposer_signature(
     )
 
     default_block = BaseBeaconBlock(**sample_beacon_block_params)
-    empty_signature_block_root = BaseBeaconBlock.get_block_without_signature_root(default_block)
+    empty_signature_block_root = default_block.block_without_signature_root
 
     proposal_root = ProposalSignedData(
         state.slot,