54 lines
1.7 KiB
Python
54 lines
1.7 KiB
Python
from eth2spec.test.helpers.keys import pubkeys, privkeys
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from eth2spec.test.helpers.state import get_balance
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from eth2spec.utils.bls import bls_sign
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from eth2spec.utils.ssz.ssz_impl import signing_root
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def get_valid_transfer(spec, state, slot=None, sender_index=None,
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recipient_index=None, amount=None, fee=None, signed=False):
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if slot is None:
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slot = state.slot
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current_epoch = spec.get_current_epoch(state)
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if sender_index is None:
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sender_index = spec.get_active_validator_indices(state, current_epoch)[-1]
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if recipient_index is None:
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recipient_index = spec.get_active_validator_indices(state, current_epoch)[0]
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transfer_pubkey = pubkeys[-1]
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transfer_privkey = privkeys[-1]
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if fee is None:
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fee = get_balance(state, sender_index) // 32
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if amount is None:
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amount = get_balance(state, sender_index) - fee
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transfer = spec.Transfer(
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sender=sender_index,
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recipient=recipient_index,
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amount=amount,
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fee=fee,
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slot=slot,
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pubkey=transfer_pubkey,
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)
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if signed:
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sign_transfer(spec, state, transfer, transfer_privkey)
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# ensure withdrawal_credentials reproducible
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state.validators[transfer.sender].withdrawal_credentials = (
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spec.BLS_WITHDRAWAL_PREFIX + spec.hash(transfer.pubkey)[1:]
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)
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return transfer
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def sign_transfer(spec, state, transfer, privkey):
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transfer.signature = bls_sign(
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message_hash=signing_root(transfer),
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privkey=privkey,
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domain=spec.get_domain(
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state=state,
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domain_type=spec.DOMAIN_TRANSFER,
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message_epoch=spec.get_current_epoch(state),
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)
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)
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return transfer
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