Sync ethereum/consensus-specs#162

Author: hwwhww

eth/beacon/state_machines/configs.py

@@ -12,8 +12,10 @@
     (
         ('SHARD_COUNT', int),  # shards
         ('DEPOSIT_SIZE', int),  # ETH
+        ('MIN_TOPUP_SIZE', int),  # ETH
         ('MIN_ONLINE_DEPOSIT_SIZE', int),  # ETH
         ('DEPOSIT_CONTRACT_ADDRESS', Address),
+        ('DEPOSITS_FOR_CHAIN_START', int),  # deposits
         ('TARGET_COMMITTEE_SIZE', int),  # validators
         ('SLOT_DURATION', int),  # seconds
         ('CYCLE_LENGTH', int),  # slots

eth/beacon/state_machines/forks/serenity/configs.py

@@ -7,8 +7,10 @@
 SERENITY_CONFIG = BeaconConfig(
     SHARD_COUNT=2**10,  # = 1,024 shards
     DEPOSIT_SIZE=2**5,  # = 32 ETH
+    MIN_TOPUP_SIZE=1,  # 1 ETH
     MIN_ONLINE_DEPOSIT_SIZE=2**4,  # = 16 ETH
     DEPOSIT_CONTRACT_ADDRESS=ZERO_ADDRESS,  # TODO: TBD
+    DEPOSITS_FOR_CHAIN_START=2**14,  # = 16,384 deposits
     TARGET_COMMITTEE_SIZE=2**8,  # = 256 validators
     SLOT_DURATION=6,  # seconds
     CYCLE_LENGTH=2**6,  # = 64 slots

tests/beacon/conftest.py

@@ -231,6 +231,11 @@ def deposit_size():
     return SERENITY_CONFIG.DEPOSIT_SIZE
 
 
+@pytest.fixture
+def min_topup_size():
+    return SERENITY_CONFIG.MIN_TOPUP_SIZE
+
+
 @pytest.fixture
 def min_online_deposit_size():
     return SERENITY_CONFIG.MIN_ONLINE_DEPOSIT_SIZE
@@ -241,6 +246,11 @@ def deposit_contract_address():
     return SERENITY_CONFIG.DEPOSIT_CONTRACT_ADDRESS
 
 
+@pytest.fixture
+def deposits_for_chain_start():
+    return SERENITY_CONFIG.DEPOSITS_FOR_CHAIN_START
+
+
 @pytest.fixture
 def target_committee_size():
     return SERENITY_CONFIG.TARGET_COMMITTEE_SIZE