mirror of
https://gitlab.com/pulsechaincom/staking-deposit-cli.git
synced 2025-01-10 13:01:22 +00:00
63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
import json
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from eth_typing import (
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BLSPubkey,
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BLSSignature,
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)
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from typing import Any, Dict
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from py_ecc.bls import G2ProofOfPossession as bls
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from eth2deposit.utils.ssz import (
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compute_deposit_domain,
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compute_signing_root,
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DepositData,
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DepositMessage,
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)
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from eth2deposit.utils.constants import (
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MAX_DEPOSIT_AMOUNT,
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MIN_DEPOSIT_AMOUNT,
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)
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def verify_deposit_data_json(filefolder: str) -> bool:
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"""
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Validate every deposit found in the deposit-data JSON file folder.
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"""
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with open(filefolder, 'r') as f:
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deposit_json = json.load(f)
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return all([validate_deposit(deposit) for deposit in deposit_json])
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return False
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def validate_deposit(deposit_data_dict: Dict[str, Any]) -> bool:
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'''
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Checks whether a deposit is valid based on the eth2 rules.
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https://github.com/ethereum/eth2.0-specs/blob/dev/specs/phase0/beacon-chain.md#deposits
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'''
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pubkey = BLSPubkey(bytes.fromhex(deposit_data_dict['pubkey']))
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withdrawal_credentials = bytes.fromhex(deposit_data_dict['withdrawal_credentials'])
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amount = deposit_data_dict['amount']
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signature = BLSSignature(bytes.fromhex(deposit_data_dict['signature']))
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deposit_message_root = bytes.fromhex(deposit_data_dict['deposit_data_root'])
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fork_version = bytes.fromhex(deposit_data_dict['fork_version'])
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# Verify deposit amount
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if not MIN_DEPOSIT_AMOUNT < amount <= MAX_DEPOSIT_AMOUNT:
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return False
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# Verify deposit signature && pubkey
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deposit_message = DepositMessage(pubkey=pubkey, withdrawal_credentials=withdrawal_credentials, amount=amount)
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domain = compute_deposit_domain(fork_version)
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signing_root = compute_signing_root(deposit_message, domain)
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if not bls.Verify(pubkey, signing_root, signature):
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return False
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# Verify Deposit Root
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signed_deposit = DepositData(
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pubkey=pubkey,
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withdrawal_credentials=withdrawal_credentials,
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amount=amount,
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signature=signature,
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)
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return signed_deposit.hash_tree_root == deposit_message_root
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