eth2.0-specs/test_libs/pyspec/eth2spec/phase0/state_transition.py

115 lines
3.0 KiB
Python
Raw Normal View History

2019-03-18 20:14:26 +00:00
from . import spec
from typing import (
2019-03-18 20:14:26 +00:00
Any,
Callable,
List
2019-03-18 20:14:26 +00:00
)
from .spec import (
BeaconState,
BeaconBlock,
)
def expected_deposit_count(state: BeaconState) -> int:
return min(
spec.MAX_DEPOSITS,
state.latest_eth1_data.deposit_count - state.deposit_index
)
def process_operation_type(state: BeaconState,
operations: List[Any],
max_operations: int,
tx_fn: Callable[[BeaconState, Any], None]) -> None:
assert len(operations) <= max_operations
for operation in operations:
tx_fn(state, operation)
2019-03-18 20:14:26 +00:00
def process_operations(state: BeaconState, block: BeaconBlock) -> None:
process_operation_type(
2019-03-18 20:14:26 +00:00
state,
block.body.proposer_slashings,
spec.MAX_PROPOSER_SLASHINGS,
spec.process_proposer_slashing,
)
process_operation_type(
2019-03-18 20:14:26 +00:00
state,
block.body.attester_slashings,
spec.MAX_ATTESTER_SLASHINGS,
spec.process_attester_slashing,
)
process_operation_type(
2019-03-18 20:14:26 +00:00
state,
block.body.attestations,
spec.MAX_ATTESTATIONS,
spec.process_attestation,
)
assert len(block.body.deposits) == expected_deposit_count(state)
process_operation_type(
2019-03-18 20:14:26 +00:00
state,
block.body.deposits,
spec.MAX_DEPOSITS,
spec.process_deposit,
)
process_operation_type(
2019-03-18 20:14:26 +00:00
state,
block.body.voluntary_exits,
spec.MAX_VOLUNTARY_EXITS,
spec.process_voluntary_exit,
)
2019-03-18 20:14:26 +00:00
assert len(block.body.transfers) == len(set(block.body.transfers))
process_operation_type(
2019-03-18 20:14:26 +00:00
state,
block.body.transfers,
spec.MAX_TRANSFERS,
spec.process_transfer,
)
def process_block(state: BeaconState,
block: BeaconBlock,
verify_state_root: bool=False) -> None:
spec.process_block_header(state, block)
spec.process_randao(state, block)
spec.process_eth1_data(state, block)
process_operations(state, block)
2019-03-18 20:14:26 +00:00
if verify_state_root:
spec.verify_block_state_root(state, block)
def process_epoch_transition(state: BeaconState) -> None:
spec.update_justification_and_finalization(state)
spec.process_crosslinks(state)
spec.maybe_reset_eth1_period(state)
spec.apply_rewards(state)
spec.process_balance_driven_status_transitions(state)
spec.update_registry(state)
2019-03-18 20:14:26 +00:00
spec.process_slashings(state)
spec.finish_epoch_update(state)
def state_transition_to(state: BeaconState, up_to: int) -> BeaconState:
while state.slot < up_to:
2019-03-18 20:14:26 +00:00
spec.cache_state(state)
if (state.slot + 1) % spec.SLOTS_PER_EPOCH == 0:
process_epoch_transition(state)
spec.advance_slot(state)
def state_transition(state: BeaconState,
block: BeaconBlock,
verify_state_root: bool=False) -> BeaconState:
state_transition_to(state, block.slot)
process_block(state, block, verify_state_root)