mirror of
https://github.com/logos-co/nomos-specs.git
synced 2025-02-02 10:34:50 +00:00
86 lines
3.3 KiB
Python
86 lines
3.3 KiB
Python
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from typing import Set
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from carnot import Carnot, Block, TimeoutQc, Vote, Event, Send, Quorum
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from beacon import *
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from overlay import EntropyOverlay
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@dataclass
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class BeaconizedBlock(Block):
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beacon: RandomBeacon
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class BeaconizedCarnot(Carnot):
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def __init__(self, sk: PrivateKey, overlay: EntropyOverlay, entropy: bytes = b""):
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self.sk = sk
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self.pk = bytes(self.sk.get_g1())
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self.random_beacon = RandomBeaconHandler(
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RandomBeacon(
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version=0,
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context=-1,
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entropy=RecoveryMode.generate_beacon(entropy, -1),
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proof=self.pk
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)
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)
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overlay.set_entropy(self.random_beacon.last_beacon.entropy)
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super().__init__(self.pk, overlay=overlay)
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def approve_block(self, block: BeaconizedBlock, votes: Set[Vote]) -> Event:
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assert block.id() in self.safe_blocks
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assert len(votes) == self.overlay.super_majority_threshold(self.id)
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assert all(self.overlay.is_member_of_child_committee(self.id, vote.voter) for vote in votes)
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assert all(vote.block == block.id() for vote in votes)
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assert self.highest_voted_view < block.view
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if self.overlay.is_member_of_root_committee(self.id):
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qc = self.build_qc(block.view, block, None)
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else:
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qc = None
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vote: Vote = Vote(
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block=block.id(),
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voter=self.id,
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view=block.view,
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qc=qc
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)
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self.highest_voted_view = max(self.highest_voted_view, block.view)
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# root members send votes to next leader, we update our beacon first
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if self.overlay.is_member_of_root_committee(self.id):
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self.random_beacon.verify_happy(block.beacon)
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self.overlay.set_entropy(self.random_beacon.last_beacon.entropy)
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return Send(to=self.overlay.leader(), payload=vote)
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# otherwise we send to the parent committee and update the beacon second
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return_event = Send(to=self.overlay.parent_committee(self.id), payload=vote)
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self.random_beacon.verify_happy(block.beacon)
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self.overlay.set_entropy(self.random_beacon.last_beacon.entropy)
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return return_event
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def receive_timeout_qc(self, timeout_qc: TimeoutQc):
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super().receive_timeout_qc(timeout_qc)
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if timeout_qc.view < self.current_view:
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return
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entropy = RecoveryMode.generate_beacon(self.random_beacon.last_beacon.entropy, timeout_qc.view)
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new_beacon = RandomBeacon(
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version=0,
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context=self.current_view,
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entropy=entropy,
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proof=b""
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)
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self.random_beacon.verify_unhappy(new_beacon)
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self.overlay.set_entropy(self.random_beacon.last_beacon.entropy)
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def propose_block(self, view: View, quorum: Quorum) -> Event:
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beacon = RandomBeacon(
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version=0,
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context=self.current_view,
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entropy=NormalMode.generate_beacon(self.sk, self.current_view),
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proof=self.pk
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)
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event: Event = super().propose_block(view, quorum)
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block = event.payload
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block = BeaconizedBlock(view=block.view, qc=block.qc, _id=block._id, beacon=beacon)
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event.payload = block
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return event
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