async def _keep_ticking(self) -> None:
"""
Ticker should tick three times in one slot:
SLOT_START: at the beginning of the slot
SLOT_ONE_THIRD: at 1/3 of the slot
SLOT_TWO_THIRD: at 2/3 of the slot
"""
# Use `sent_tick_types_at_slot` set to record
# the tick types that haven been sent at current slot.
sent_tick_types_at_slot: Set[TickType] = set()
while self.is_operational:
elapsed_time = Second(int(time.time()) - self.genesis_time)
# Skip genesis slot
if elapsed_time < self.seconds_per_slot:
continue
elapsed_slots = elapsed_time // self.seconds_per_slot
slot = Slot(elapsed_slots + self.genesis_slot)
tick_type = self._get_tick_type(elapsed_time)
# New slot
if slot > self.latest_slot:
self.latest_slot = slot
await self._broadcast_slot_tick_event(slot, elapsed_time,
tick_type)
# Clear set
sent_tick_types_at_slot = set()
sent_tick_types_at_slot.add(TickType.SLOT_START)
elif not tick_type.is_start and tick_type not in sent_tick_types_at_slot:
await self._broadcast_slot_tick_event(slot, elapsed_time,
tick_type)
sent_tick_types_at_slot.add(tick_type)
await asyncio.sleep(self.seconds_per_slot // self.check_frequency)
async def _keep_ticking(self) -> None:
"""
Ticker should tick twice in one slot:
one for a new slot, one for the second half of an already ticked slot,
e.g., if `seconds_per_slot` is `6`, for slot `49` it should tick once
for the first 3 seconds and once for the last 3 seconds.
"""
# `has_sent_second_half_slot_tick` is used to prevent another tick
# for the second half of a ticked slot.
has_sent_second_half_slot_tick = False
while self.is_operational:
elapsed_time = Second(int(time.time()) - self.genesis_time)
if elapsed_time >= self.seconds_per_slot:
slot = Slot(elapsed_time // self.seconds_per_slot +
self.genesis_slot)
is_second_tick = ((elapsed_time % self.seconds_per_slot) >=
(self.seconds_per_slot / 2))
# Case 1: new slot
if slot > self.latest_slot:
self.logger.debug(
bold_green("Tick this_slot=%s elapsed=%s"),
slot,
elapsed_time,
)
self.latest_slot = slot
await self.event_bus.broadcast(
SlotTickEvent(
slot=slot,
elapsed_time=elapsed_time,
is_second_tick=is_second_tick,
),
BroadcastConfig(internal=True),
)
has_sent_second_half_slot_tick = is_second_tick
# Case 2: second half of an already ticked slot and it hasn't tick yet
elif is_second_tick and not has_sent_second_half_slot_tick:
self.logger.debug(
bold_green("Tick this_slot=%s (second-tick)"), slot)
await self.event_bus.broadcast(
SlotTickEvent(
slot=slot,
elapsed_time=elapsed_time,
is_second_tick=is_second_tick,
),
BroadcastConfig(internal=True),
)
has_sent_second_half_slot_tick = True
await asyncio.sleep(self.seconds_per_slot //
DEFAULT_CHECK_FREQUENCY)
def _decoder(
# NOTE: mypy incorrectly thinks `Field` is a generic type
data: Dict[str, EncodedConfigTypes],
fields: Collection[Field], # type: ignore
) -> Iterable[Tuple[str, ConfigTypes]]:
# NOTE: this code is unwieldly but it satisfies `mypy`
for field in fields:
if field.type is Gwei:
yield field.name, Gwei(cast(int, data[field.name]))
elif field.type is Slot:
yield field.name, Slot(cast(int, data[field.name]))
elif field.type is Epoch:
yield field.name, Epoch(cast(int, data[field.name]))
elif field.type is Second:
yield field.name, Second(cast(int, data[field.name]))
elif field.type is bytes:
yield field.name, decode_hex(cast(str, data[field.name]))
else:
yield field.name, int(data[field.name])
async def _keep_ticking(self) -> None:
while self.is_operational:
elapsed_time = Second(int(time.time()) - self.genesis_time)
if elapsed_time >= self.seconds_per_slot:
slot = Slot(elapsed_time // self.seconds_per_slot +
self.genesis_slot)
if slot > self.latest_slot:
self.logger.debug(
bold_green(
f"New slot: {slot}\tElapsed time: {elapsed_time}"))
self.latest_slot = slot
self.event_bus.broadcast(
NewSlotEvent(
slot=slot,
elapsed_time=elapsed_time,
),
BroadcastConfig(internal=True),
)
await asyncio.sleep(self.seconds_per_slot //
DEFAULT_CHECK_FREQUENCY)
HYSTERESIS_DOWNWARD_MULTIPLIER=1,
HYSTERESIS_UPWARD_MULTIPLIER=5,
# Genesis
MIN_GENESIS_ACTIVE_VALIDATOR_COUNT=2**14,
MIN_GENESIS_TIME=1578009600, # (= Jan 3, 2020)
# Gwei values
MIN_DEPOSIT_AMOUNT=Gwei(2**0 * GWEI_PER_ETH), # (= 1,000,000,000) Gwei
MAX_EFFECTIVE_BALANCE=Gwei(2**5 * GWEI_PER_ETH), # (= 32,000,000,00) Gwei
EJECTION_BALANCE=Gwei(2**4 * GWEI_PER_ETH), # (= 16,000,000,000) Gwei
EFFECTIVE_BALANCE_INCREMENT=Gwei(2**0 *
GWEI_PER_ETH), # (= 1,000,000,000) Gwei
# Initial values
GENESIS_FORK_VERSION=Version(b"\x00" * 4),
BLS_WITHDRAWAL_PREFIX=b"\x00",
# Time parameters
GENESIS_DELAY=Second(172800),
SECONDS_PER_SLOT=Second(12), # seconds
MIN_ATTESTATION_INCLUSION_DELAY=2**0, # (= 1) slots
SLOTS_PER_EPOCH=2**5, # (= 32) slots
MIN_SEED_LOOKAHEAD=2**0, # (= 1) epochs
MAX_SEED_LOOKAHEAD=2**2, # (= 4) epochs
SLOTS_PER_HISTORICAL_ROOT=2**13, # (= 8,192) slots
MIN_VALIDATOR_WITHDRAWABILITY_DELAY=2**8, # (= 256) epochs
SHARD_COMMITTEE_PERIOD=2**8, # (= 256) epochs
MIN_EPOCHS_TO_INACTIVITY_PENALTY=2**2,
# State list lengths
EPOCHS_PER_ETH1_VOTING_PERIOD=32,
EPOCHS_PER_HISTORICAL_VECTOR=2**16,
EPOCHS_PER_SLASHINGS_VECTOR=2**13,
HISTORICAL_ROOTS_LIMIT=2**24,
VALIDATOR_REGISTRY_LIMIT=2**40,
SHUFFLE_ROUND_COUNT=90,
# Genesis
MIN_GENESIS_ACTIVE_VALIDATOR_COUNT=2**16,
MIN_GENESIS_TIME=1578009600, # (= Jan 3, 2020)
# Gwei values
MIN_DEPOSIT_AMOUNT=Gwei(2**0 * GWEI_PER_ETH), # (= 1,000,000,000) Gwei
MAX_EFFECTIVE_BALANCE=Gwei(2**5 * GWEI_PER_ETH), # (= 32,000,000,00) Gwei
EJECTION_BALANCE=Gwei(2**4 * GWEI_PER_ETH), # (= 16,000,000,000) Gwei
EFFECTIVE_BALANCE_INCREMENT=Gwei(2**0 *
GWEI_PER_ETH), # (= 1,000,000,000) Gwei
# Initial values
GENESIS_SLOT=Slot(0),
GENESIS_EPOCH=Epoch(0),
BLS_WITHDRAWAL_PREFIX=0,
# Time parameters
SECONDS_PER_SLOT=Second(12), # seconds
MIN_ATTESTATION_INCLUSION_DELAY=2**0, # (= 1) slots
SLOTS_PER_EPOCH=2**5, # (= 32) slots
MIN_SEED_LOOKAHEAD=2**0, # (= 1) epochs
MAX_SEED_LOOKAHEAD=2**2, # (= 4) epochs
SLOTS_PER_ETH1_VOTING_PERIOD=2**10, # (= 16) epochs
SLOTS_PER_HISTORICAL_ROOT=2**13, # (= 8,192) slots
MIN_VALIDATOR_WITHDRAWABILITY_DELAY=2**8, # (= 256) epochs
PERSISTENT_COMMITTEE_PERIOD=2**11, # (= 2,048) epochs
MIN_EPOCHS_TO_INACTIVITY_PENALTY=2**2,
# State list lengths
EPOCHS_PER_HISTORICAL_VECTOR=2**16,
EPOCHS_PER_SLASHINGS_VECTOR=2**13,
HISTORICAL_ROOTS_LIMIT=2**24,
VALIDATOR_REGISTRY_LIMIT=2**40,
# Reward and penalty quotients
DEPOSIT_CONTRACT_ADDRESS=ZERO_ADDRESS, # TBD
DEPOSIT_CONTRACT_TREE_DEPTH=2**5, # (= 32)
# Gwei values
MIN_DEPOSIT_AMOUNT=Gwei(2**0 * GWEI_PER_ETH), # (= 1,000,000,000) Gwei
MAX_DEPOSIT_AMOUNT=Gwei(2**5 * GWEI_PER_ETH), # (= 32,000,000,00) Gwei
FORK_CHOICE_BALANCE_INCREMENT=Gwei(2**0 *
GWEI_PER_ETH), # (= 1,000,000,000) Gwei
EJECTION_BALANCE=Gwei(2**4 * GWEI_PER_ETH), # (= 16,000,000,000) Gwei
# Initial values
GENESIS_FORK_VERSION=0,
GENESIS_SLOT=GENESIS_SLOT,
GENESIS_EPOCH=slot_to_epoch(GENESIS_SLOT, SLOTS_PER_EPOCH),
GENESIS_START_SHARD=Shard(0),
BLS_WITHDRAWAL_PREFIX_BYTE=b'\x00',
# Time parameters
SECONDS_PER_SLOT=Second(6), # seconds
MIN_ATTESTATION_INCLUSION_DELAY=2**2, # (= 4) slots
SLOTS_PER_EPOCH=SLOTS_PER_EPOCH, # (= 64) slots
MIN_SEED_LOOKAHEAD=2**0, # (= 1) epochs
ACTIVATION_EXIT_DELAY=2**2, # (= 4) epochs
EPOCHS_PER_ETH1_VOTING_PERIOD=2**4, # (= 16) epochs
MIN_VALIDATOR_WITHDRAWABILITY_DELAY=2**8, # (= 256) epochs
PERSISTENT_COMMITTEE_PERIOD=2**11, # (= 2,048) epochs
# State list lengths
SLOTS_PER_HISTORICAL_ROOT=2**13, # (= 8,192) slots
LATEST_ACTIVE_INDEX_ROOTS_LENGTH=2**13, # (= 8,192) epochs
LATEST_RANDAO_MIXES_LENGTH=2**13, # (= 8,192) epochs
LATEST_SLASHED_EXIT_LENGTH=2**13, # (= 8,192) epochs
# Reward and penalty quotients
BASE_REWARD_QUOTIENT=2**10, # (= 1,024)
WHISTLEBLOWER_REWARD_QUOTIENT=2**9, # (= 512)
MAX_CASPER_VOTES=2**10, # (= 1,024) votes LATEST_BLOCK_ROOTS_LENGTH=2**13, # (= 8,192) block roots LATEST_RANDAO_MIXES_LENGTH=2**13, # (= 8,192) randao mixes LATEST_PENALIZED_EXIT_LENGTH=2**13, # (= 8,192) randao mixes # Deposit contract DEPOSIT_CONTRACT_ADDRESS=ZERO_ADDRESS, # TBD DEPOSIT_CONTRACT_TREE_DEPTH=2**5, # (= 32) MIN_DEPOSIT=Ether(2**0), # (= 1) ETH MAX_DEPOSIT=Ether(2**5), # (= 32) ETH # Initial values GENESIS_FORK_VERSION=0, GENESIS_SLOT=SlotNumber(0), GENESIS_START_SHARD=ShardNumber(0), BLS_WITHDRAWAL_PREFIX_BYTE=b'\x00', # Time parameters SLOT_DURATION=Second(6), # seconds MIN_ATTESTATION_INCLUSION_DELAY=2**2, # (= 4) slots EPOCH_LENGTH=2**6, # (= 64) slots SEED_LOOKAHEAD=2**6, # (= 64) slots ENTRY_EXIT_DELAY=2**8, # (= 256) slots ETH1_DATA_VOTING_PERIOD=2**10, # (= 1,024) slots MIN_VALIDATOR_WITHDRAWAL_TIME=2**14, # (= 16,384) slots # Reward and penalty quotients BASE_REWARD_QUOTIENT=2**10, # (= 1,024) WHISTLEBLOWER_REWARD_QUOTIENT=2**9, # (= 512) INCLUDER_REWARD_QUOTIENT=2**3, # (= 8) INACTIVITY_PENALTY_QUOTIENT=2**24, # (= 16,777,216) # Max operations per block MAX_PROPOSER_SLASHINGS=2**4, # (= 16) MAX_CASPER_SLASHINGS=2**4, # (= 16) MAX_ATTESTATIONS=2**7, # (= 128)
HYSTERESIS_DOWNWARD_MULTIPLIER=1,
HYSTERESIS_UPWARD_MULTIPLIER=5,
# Genesis
MIN_GENESIS_ACTIVE_VALIDATOR_COUNT=64,
MIN_GENESIS_TIME=1578009600, # (= Jan 3, 2020)
# Gwei values
MIN_DEPOSIT_AMOUNT=Gwei(2**0 * GWEI_PER_ETH), # (= 1,000,000,000) Gwei
MAX_EFFECTIVE_BALANCE=Gwei(2**5 * GWEI_PER_ETH), # (= 32,000,000,00) Gwei
EJECTION_BALANCE=Gwei(2**4 * GWEI_PER_ETH), # (= 16,000,000,000) Gwei
EFFECTIVE_BALANCE_INCREMENT=Gwei(2**0 *
GWEI_PER_ETH), # (= 1,000,000,000) Gwei
# Initial values
GENESIS_FORK_VERSION=Version(b"\x00" * 4),
BLS_WITHDRAWAL_PREFIX=b"\x00",
# Time parameters
GENESIS_DELAY=Second(300),
SECONDS_PER_SLOT=Second(6), # seconds
MIN_ATTESTATION_INCLUSION_DELAY=2**0, # (= 1) slots
SLOTS_PER_EPOCH=8,
MIN_SEED_LOOKAHEAD=2**0, # (= 1) epochs
MAX_SEED_LOOKAHEAD=2**2, # (= 4) epochs
SLOTS_PER_HISTORICAL_ROOT=64,
MIN_VALIDATOR_WITHDRAWABILITY_DELAY=256,
SHARD_COMMITTEE_PERIOD=2**6, # (= 64) epochs
MIN_EPOCHS_TO_INACTIVITY_PENALTY=4,
# State list lengths
EPOCHS_PER_ETH1_VOTING_PERIOD=2**32,
EPOCHS_PER_HISTORICAL_VECTOR=64,
EPOCHS_PER_SLASHINGS_VECTOR=64,
HISTORICAL_ROOTS_LIMIT=2**24,
VALIDATOR_REGISTRY_LIMIT=2**40,