Update 0_beacon-chain.md
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@ -1041,9 +1041,12 @@ def verify_merkle_branch(leaf: Bytes32, proof: List[Bytes32], depth: int, index:
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```python
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def get_crosslink_committee_for_attestation(state: BeaconState,
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attestation_data: AttestationData) -> List[ValidatorIndex]:
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# Find the committee in the list with the desired shard
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"""
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Return the crosslink committee corresponding to ``attestation_data``.
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"""
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crosslink_committees = get_crosslink_committees_at_slot(state, attestation_data.slot)
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# Find the committee in the list with the desired shard
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assert attestation_data.shard in [shard for _, shard in crosslink_committees]
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crosslink_committee = [committee for committee, shard in crosslink_committees if shard == attestation_data.shard][0]
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