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31 lines
1.0 KiB
Python
31 lines
1.0 KiB
Python
from eth2spec.test.helpers.keys import privkeys
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from eth2spec.utils import bls
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def sign_shard_attestation(spec, beacon_state, shard_state, block, participants):
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signatures = []
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message_hash = spec.ShardAttestationData(
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slot=block.slot,
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parent_root=block.parent_root,
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).hash_tree_root()
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block_epoch = spec.compute_epoch_of_shard_slot(block.slot)
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for validator_index in participants:
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privkey = privkeys[validator_index]
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signatures.append(
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get_attestation_signature(
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spec,
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beacon_state,
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shard_state,
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message_hash,
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block_epoch,
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privkey,
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)
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)
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return bls.Aggregate(signatures)
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def get_attestation_signature(spec, beacon_state, shard_state, message_hash, block_epoch, privkey):
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domain = spec.get_domain(beacon_state, spec.DOMAIN_SHARD_ATTESTER, block_epoch)
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message = spec.compute_signing_root(message_hash, domain)
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return bls.Sign(privkey, message)
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