51 lines
1.4 KiB
Python
51 lines
1.4 KiB
Python
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from py_ecc import bls
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import eth2spec.phase1.spec as spec
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from eth2spec.phase0.spec import (
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# constants
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ZERO_HASH,
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CUSTODY_PERIOD_TO_RANDAO_PADDING,
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# SSZ
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RandaoKeyReveal,
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# functions
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get_active_validator_indices,
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get_current_epoch,
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get_domain,
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hash_tree_root,
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)
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def get_valid_randao_key_reveal(state, epoch=None):
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current_epoch = get_current_epoch(state)
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revealed_index = get_active_validator_indices(state, current_epoch)[-1]
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masker_index = get_active_validator_indices(state, current_epoch)[0]
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if epoch is None:
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epoch = current_epoch + CUSTODY_PERIOD_TO_RANDAO_PADDING
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reveal = bls.sign(
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message_hash=hash_tree_root(epoch),
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privkey=pubkey_to_privkey[state.validator_registry[revealed_index].pubkey],
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domain=get_domain(
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state=state,
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domain_type=spec.DOMAIN_RANDAO,
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message_epoch=epoch,
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),
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)
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mask = bls.sign(
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message_hash=hash_tree_root(epoch),
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privkey=pubkey_to_privkey[state.validator_registry[masker_index].pubkey],
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domain=get_domain(
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state=state,
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domain_type=spec.DOMAIN_RANDAO,
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message_epoch=epoch,
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),
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)
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return RandaoKeyReveal(
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revealed_index=revealed_index,
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epoch=epoch,
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reveal=reveal,
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masker_index=masker_index,
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mask=mask,
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)
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