def test_signature_verification(message_encodings):
account = Account.create()
structured_msg = encode_structured_data(**message_encodings)
signed = Account.sign_message(structured_msg, account.key)
new_addr = Account.recover_message(structured_msg,
signature=signed.signature)
assert new_addr == account.address
def test_signature_variables(message_encodings):
# Check that the signature of typed message is the same as that
# mentioned in the EIP. The link is as follows
# https://github.com/ethereum/EIPs/blob/master/assets/eip-712/Example.js
structured_msg = encode_structured_data(**message_encodings)
privateKey = keccak(text="cow")
acc = Account.from_key(privateKey)
assert HexBytes(
acc.address) == HexBytes("0xcd2a3d9f938e13cd947ec05abc7fe734df8dd826")
sig = Account.sign_message(structured_msg, privateKey)
assert sig.v == 27
assert hex(
sig.r
) == "0x58635e9afd7a2a5338cf2af3d711b50235a1955c43f8bca1657c9d0834fcdb5a"
assert hex(
sig.s
) == "0x44a7c0169616cfdfc16815714c9bc1c94139e17a0761a17530cf3dd1746bc10b"