Merge pull request #965 from ethereum/JustinDrake-patch-18

Disallow transfers

specs/core/0_beacon-chain.md

@@ -253,7 +253,7 @@ These configurations are updated for releases, but may be out of sync during `de
 | `MAX_ATTESTATIONS` | `2**7` (= 128) |
 | `MAX_DEPOSITS` | `2**4` (= 16) |
 | `MAX_VOLUNTARY_EXITS` | `2**4` (= 16) |
-| `MAX_TRANSFERS` | `2**4` (= 16) |
+| `MAX_TRANSFERS` | `0` |
 
 ### Signature domains
 

test_libs/pyspec/tests/test_sanity.py

@@ -380,7 +380,10 @@ def test_voluntary_exit(state):
     return pre_state, [initiate_exit_block, exit_block], post_state
 
 
-def test_transfer(state):
+def test_transfer(state, config):
+    # overwrite default 0 to test
+    spec.MAX_TRANSFERS = 1
+
     pre_state = deepcopy(state)
     current_epoch = get_current_epoch(pre_state)
     sender_index = get_active_validator_indices(pre_state, current_epoch)[-1]