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eth2.0-specs
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check crosslinks validity root against previous

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Danny Ryan 2019-04-14 08:24:54 +10:00
parent 9489ae5dcd
commit eafcab7e58
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2 changed files with 7 additions and 2 deletions
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4
specs/core/0_beacon-chain.md
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@ -1920,8 +1920,8 @@ def get_crosslink_deltas(state: BeaconState) -> Tuple[List[Gwei], List[Gwei]]:
# do not count as success if winning_root did not or cannot form a chain
attempted_crosslink = Crosslink(epoch=slot_to_epoch(slot), crosslink_data_root=winning_root, previous_crosslink_root=previous_crosslink_root)
current_crosslink_root = hash_tree_root(state.current_crosslinks[shard])
if not current_crosslink_root in {previous_crosslink_root, hash_tree_root(attempted_crosslink) }:
actual_crosslink_root = hash_tree_root(state.previous_crosslinks[shard])
if not actual_crosslink_root in {previous_crosslink_root, hash_tree_root(attempted_crosslink)}:
participants = []
participating_balance = get_total_balance(state, participants)

5
tests/phase0/epoch_processing/test_process_crosslinks.py
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@ -81,10 +81,15 @@ def test_single_crosslink_update_from_previous_epoch(state):
assert len(state.previous_epoch_attestations) == 1
pre_state, post_state = run_process_crosslinks(state)
crosslink_deltas = get_crosslink_deltas(state)
shard = attestation.data.shard
assert post_state.previous_crosslinks[shard] != post_state.current_crosslinks[shard]
assert pre_state.current_crosslinks[shard] != post_state.current_crosslinks[shard]
# ensure rewarded
slot = attestation.data.slot
assert crosslink_deltas[0][slot % spec.SLOTS_PER_EPOCH] > 0
assert crosslink_deltas[1][slot % spec.SLOTS_PER_EPOCH] == 0
return pre_state, post_state