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Introduce nucypher.crypto.api.recover_address_eip_191() to get address from signatures

pull/1029/head
David Núñez 2019-06-12 16:25:19 +02:00
parent ecc656a205
commit bfc50ecb45
1 changed files with 9 additions and 2 deletions
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11
nucypher/crypto/api.py
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@ -106,14 +106,21 @@ def ecdsa_sign(message: bytes,
return signature_der_bytes
def verify_eip_191(address: str, message: bytes, signature: bytes) -> bool:
def recover_address_eip_191(message: bytes, signature: bytes) -> str:
"""
EIP-191 Compatible signature verification for usage with w3.eth.sign.
Recover checksum address from EIP-191 signature
"""
signable_message = encode_defunct(primitive=message)
recovery = Account.recover_message(signable_message=signable_message, signature=signature)
recovered_address = to_checksum_address(recovery)
return recovered_address
def verify_eip_191(address: str, message: bytes, signature: bytes) -> bool:
"""
EIP-191 Compatible signature verification for usage with w3.eth.sign.
"""
recovered_address = recover_address_eip_191(message=message, signature=signature)
signature_is_valid = recovered_address == to_checksum_address(address)
return signature_is_valid