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Dandelion phases now have IDs so it can be known more easily if an epoch elapsed

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This commit is contained in:
Kevin F 2022-03-20 13:00:04 -05:00
parent 8b2b6a613e
commit fd9e6f5ede
1 changed files with 7 additions and 6 deletions
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13
src/gossip/dandelion/phase.py
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@ -9,18 +9,19 @@ class DandelionPhase:
self.epoch = int(time()) self.epoch = int(time())
self.epoch_interval = epoch_interval_secs self.epoch_interval = epoch_interval_secs
self._is_stem = True self._is_stem = True
self.phase_id = b''
def _update_stem_phase(self, cur_time): def _update_stem_phase(self, cur_time):
self.epoch = cur_time self.epoch = cur_time
# Hash the seed with the time stamp to produce 1 pseudorandom byte # Hash the seed with the time stamp to produce 8 pseudorandom bytes
# We produce an len(8) byte string for year 2038 problem # Produce an len(8) byte string for time as well for year 2038 problem
choice = shake_128( self.phase_id = shake_128(
self.seed + self.seed +
int.to_bytes(cur_time, 8, 'big')).digest(1) int.to_bytes(cur_time, 8, 'big')).digest(8)
# If the byte is even # Use first byte of phase id as random source for stem phase picking
if int.from_bytes(choice, 'big') % 2: if int.from_bytes(self.phase_id[0], 'big') % 2:
self._is_stem = True self._is_stem = True
else: else:
self._is_stem = False self._is_stem = False