eth2.0-specs/test_libs/pyspec/eth2spec/test/helpers/block.py

63 lines
2.0 KiB
Python

from eth2spec.phase0 import spec
from eth2spec.phase0.spec import get_beacon_proposer_index, slot_to_epoch, get_domain, BeaconBlock
from copy import deepcopy
from eth2spec.test.helpers.keys import privkeys
from eth2spec.test.helpers.state import next_slot
from eth2spec.utils.bls import bls_sign
from eth2spec.utils.minimal_ssz import signing_root, hash_tree_root
def make_block_signature(state, block):
assert block.slot == state.slot or block.slot == state.slot + 1
if block.slot == state.slot:
proposer_index = get_beacon_proposer_index(state)
else:
# use stub state to get proposer index of next slot
stub_state = deepcopy(state)
next_slot(stub_state)
proposer_index = get_beacon_proposer_index(stub_state)
privkey = privkeys[proposer_index]
block.body.randao_reveal = bls_sign(
privkey=privkey,
message_hash=hash_tree_root(slot_to_epoch(block.slot)),
domain=get_domain(
state,
message_epoch=slot_to_epoch(block.slot),
domain_type=spec.DOMAIN_RANDAO,
)
)
block.signature = bls_sign(
message_hash=signing_root(block),
privkey=privkey,
domain=get_domain(
state,
spec.DOMAIN_BEACON_PROPOSER,
slot_to_epoch(block.slot)))
return block
def build_empty_block(state, slot=None, signed=False):
if slot is None:
slot = state.slot
empty_block = BeaconBlock()
empty_block.slot = slot
empty_block.body.eth1_data.deposit_count = state.deposit_index
previous_block_header = deepcopy(state.latest_block_header)
if previous_block_header.state_root == spec.ZERO_HASH:
previous_block_header.state_root = state.hash_tree_root()
empty_block.previous_block_root = signing_root(previous_block_header)
if signed:
make_block_signature(state, empty_block)
return empty_block
def build_empty_block_for_next_slot(state, signed=False):
return build_empty_block(state, state.slot + 1, signed=signed)