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