Merge pull request #2014 from ethereum/vbuterin-patch-1

Remove AttestationCustodyBitWrapper

specs/phase1/beacon-chain.md

@@ -35,7 +35,6 @@
   - [`ShardState`](#shardstate)
   - [`ShardTransition`](#shardtransition)
   - [`CompactCommittee`](#compactcommittee)
-  - [`AttestationCustodyBitWrapper`](#attestationcustodybitwrapper)
 - [Helper functions](#helper-functions)
   - [Misc](#misc-1)
     - [`compute_previous_slot`](#compute_previous_slot)
@@ -408,15 +407,6 @@ class CompactCommittee(Container):
     compact_validators: List[uint64, MAX_VALIDATORS_PER_COMMITTEE]
 ```
 
-### `AttestationCustodyBitWrapper`
-
-```python
-class AttestationCustodyBitWrapper(Container):
-    attestation_data_root: Root
-    block_index: uint64
-    bit: boolean
-```
-
 ## Helper functions
 
 ### Misc

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

@@ -193,19 +193,6 @@ def sign_indexed_attestation(spec, state, indexed_attestation):
     indexed_attestation.signature = sign_aggregate_attestation(spec, state, data, participants)
 
 
-def get_attestation_custody_signature(spec, state, attestation_data, block_index, bit, privkey):
-    domain = spec.get_domain(state, spec.DOMAIN_BEACON_ATTESTER, attestation_data.target.epoch)
-    signing_root = spec.compute_signing_root(
-        spec.AttestationCustodyBitWrapper(
-            attestation_data_root=attestation_data.hash_tree_root(),
-            block_index=block_index,
-            bit=bit,
-        ),
-        domain,
-    )
-    return bls.Sign(privkey, signing_root)
-
-
 def sign_attestation(spec, state, attestation):
     participants = spec.get_attesting_indices(
         state,