def test_transacting_power_sign_transaction(testerchain):
eth_address = testerchain.unassigned_accounts[2]
power = TransactingPower(password=INSECURE_DEVELOPMENT_PASSWORD,
signer=Web3Signer(testerchain.client),
account=eth_address)
transaction_dict = {
'nonce': testerchain.client.w3.eth.getTransactionCount(eth_address),
'gasPrice': testerchain.client.w3.eth.gasPrice,
'gas': 100000,
'from': eth_address,
'to': testerchain.unassigned_accounts[1],
'value': 1,
'data': b''
}
# Sign
power.activate()
signed_transaction = power.sign_transaction(
transaction_dict=transaction_dict)
# Demonstrate that the transaction is valid RLP encoded.
from eth_account._utils.legacy_transactions import Transaction
restored_transaction = Transaction.from_bytes(
serialized_bytes=signed_transaction)
restored_dict = restored_transaction.as_dict()
assert to_checksum_address(restored_dict['to']) == transaction_dict['to']
# Try signing with missing transaction fields
del transaction_dict['gas']
del transaction_dict['nonce']
with pytest.raises(TypeError):
power.sign_transaction(transaction_dict=transaction_dict)
def test_transacting_power_sign_agent_transaction(testerchain, agency,
test_registry):
token_agent = NucypherTokenAgent(registry=test_registry)
contract_function = token_agent.contract.functions.approve(
testerchain.etherbase_account, 100)
payload = {
'chainId':
int(testerchain.client.chain_id),
'nonce':
testerchain.client.w3.eth.getTransactionCount(
testerchain.etherbase_account),
'from':
testerchain.etherbase_account,
'gasPrice':
testerchain.client.gas_price
}
unsigned_transaction = contract_function.buildTransaction(payload)
# Sign with Transacting Power
transacting_power = TransactingPower(
password=INSECURE_DEVELOPMENT_PASSWORD,
signer=Web3Signer(testerchain.client),
account=testerchain.etherbase_account)
signed_raw_transaction = transacting_power.sign_transaction(
unsigned_transaction)
# Demonstrate that the transaction is valid RLP encoded.
restored_transaction = Transaction.from_bytes(
serialized_bytes=signed_raw_transaction)
restored_dict = restored_transaction.as_dict()
assert to_checksum_address(
restored_dict['to']) == unsigned_transaction['to']
def recover_transaction(self, serialized_transaction):
"""
Get the address of the account that signed this transaction.
:param serialized_transaction: the complete signed transaction
:type serialized_transaction: hex str, bytes or int
:returns: address of signer, hex-encoded & checksummed
:rtype: str
.. doctest:: python
>>> raw_transaction = '0xf86a8086d55698372431831e848094f0109fc8df283027b6285cc889f5aa624eac1f55843b9aca008025a009ebb6ca057a0535d6186462bc0b465b561c94a295bdb0621fc19208ab149a9ca0440ffd775ce91a833ab410777204d5341a6f9fa91216a6f3ee2c051fea6a0428' # noqa: E501
>>> Account.recover_transaction(raw_transaction)
'0x2c7536E3605D9C16a7a3D7b1898e529396a65c23'
"""
txn_bytes = HexBytes(serialized_transaction)
if len(txn_bytes) > 0 and txn_bytes[0] <= 0x7f:
# We are dealing with a typed transaction.
typed_transaction = TypedTransaction.from_bytes(txn_bytes)
msg_hash = typed_transaction.hash()
vrs = typed_transaction.vrs()
return self._recover_hash(msg_hash, vrs=vrs)
txn = Transaction.from_bytes(txn_bytes)
msg_hash = hash_of_signed_transaction(txn)
return self._recover_hash(msg_hash, vrs=vrs_from(txn))
def test_keystore_sign_transaction(good_signer, mock_account):
transaction_dict = assoc(TRANSACTION_DICT,
'from',
value=mock_account.address)
signed_transaction = good_signer.sign_transaction(
transaction_dict=transaction_dict)
assert isinstance(signed_transaction, HexBytes)
# assert valid transaction
transaction = Transaction.from_bytes(signed_transaction)
assert to_checksum_address(transaction.to) == transaction_dict['to']
def test_character_transacting_power_signing(testerchain, agency,
test_registry):
# Pretend to be a character.
eth_address = testerchain.etherbase_account
signer = Character(is_me=True,
eth_provider_uri=MOCK_ETH_PROVIDER_URI,
registry=test_registry,
checksum_address=eth_address)
# Manually consume the power up
transacting_power = TransactingPower(
password=INSECURE_DEVELOPMENT_PASSWORD,
signer=Web3Signer(testerchain.client),
account=eth_address)
signer._crypto_power.consume_power_up(transacting_power)
# Retrieve the power up
power = signer._crypto_power.power_ups(TransactingPower)
assert power == transacting_power
# Sign Message
data_to_sign = b'Premium Select Luxury Pencil Holder'
signature = power.sign_message(message=data_to_sign)
is_verified = verify_eip_191(address=eth_address,
message=data_to_sign,
signature=signature)
assert is_verified is True
# Sign Transaction
transaction_dict = {
'nonce': testerchain.client.w3.eth.getTransactionCount(eth_address),
'gasPrice': testerchain.client.w3.eth.gasPrice,
'gas': 100000,
'from': eth_address,
'to': testerchain.unassigned_accounts[1],
'value': 1,
'data': b''
}
signed_transaction = power.sign_transaction(
transaction_dict=transaction_dict)
# Demonstrate that the transaction is valid RLP encoded.
restored_transaction = Transaction.from_bytes(
serialized_bytes=signed_transaction)
restored_dict = restored_transaction.as_dict()
assert to_checksum_address(restored_dict['to']) == transaction_dict['to']
def test_trezor_sign_transaction(mock_trezor, mock_account):
trezor_signer = TrezorSigner()
transaction_dict = assoc(TRANSACTION_DICT,
key='from',
value=mock_account.address)
signed_transaction = trezor_signer.sign_transaction(
transaction_dict=transaction_dict)
assert isinstance(signed_transaction, HexBytes)
# assert valid deserializable transaction
transaction = Transaction.from_bytes(signed_transaction)
# Confirm the integrity of the sender and recipient address
failure_message = 'WARNING: transaction "to" field was mutated'
sender_checksum_address = to_checksum_address(transaction.to)
assert sender_checksum_address != mock_account.address, failure_message
assert sender_checksum_address == TRANSACTION_DICT['to'], failure_message
assert sender_checksum_address == transaction_dict['to'] # positive
assert sender_checksum_address != mock_account.address # negative
def sign_transaction(self,
transaction_dict: dict,
rlp_encoded: bool = True
) -> Union[HexBytes, Transaction]:
"""
Sign a transaction with a trezor hardware wallet.
This non-mutative method handles transaction validation, field formatting, signing,
and outgoing serialization. Accepts a standard transaction dictionary as input,
and produces an RLP encoded raw signed transaction by default.
Internally the standard transaction dictionary is reformatted for trezor API consumption
via calls `trezorlib.client.ethereum.sign_tx`.
WARNING: This function returns a raw signed transaction which can be
broadcast by anyone with a connection to the ethereum network.
***Treat pre-signed raw transactions produced by this function like money.***
"""
# Eager enforcement of EIP-155
# https://github.com/ethereum/EIPs/blob/master/EIPS/eip-155.md
#
# Leave the chain ID in tact for the trezor signing request so that an EIP-155 transaction signature will be applied
# https://github.com/trezor/trezor-core/pull/311
if 'chainId' not in transaction_dict:
raise self.SignerError('Invalid EIP-155 transaction - "chain_id" field is missing in trezor signing request.')
# Consume the sender inside the transaction request's 'from field.
try:
sender_address = transaction_dict['from']
except KeyError:
raise self.SignerError("'from' field is missing from trezor signing request.")
transaction_dict = dissoc(transaction_dict, 'from')
# Format contract data field for both trezor and eth_account's Transaction
formatters = {'data': lambda data: Web3.toBytes(HexBytes(data))}
transaction_dict = dict(apply_formatters_to_dict(formatters, transaction_dict))
# Format transaction fields for Trezor, Lookup HD path
trezor_transaction = self._format_transaction(transaction_dict=transaction_dict)
# Note that the derivation path on the trezor must correlate with the chain id
# in the transaction. Since Trezor firmware version 2.3.1 mismatched chain_id
# and derivation path will fail to sign with 'forbidden key path'.
# https://github.com/trezor/trezor-firmware/issues/1050#issuecomment-640718622
hd_path = self.__get_address_path(checksum_address=sender_address) # from cache
# Trezor signing request
_v, _r, _s = self.__sign_transaction(n=hd_path, trezor_transaction=trezor_transaction)
# Create RLP serializable Transaction instance with eth_account
# chainId is not longer needed since it can later be derived from v
transaction_dict = dissoc(transaction_dict, 'chainId')
# 'to' may be blank if this transaction is contract creation
formatters = {'to': to_canonical_address}
transaction_dict = dict(apply_formatters_to_dict(formatters, transaction_dict))
signed_transaction = Transaction(v=to_int(_v), # type: int
r=to_int(_r), # bytes -> int
s=to_int(_s), # bytes -> int
**transaction_dict)
# Optionally encode as RLP for broadcasting
if rlp_encoded:
signed_transaction = HexBytes(rlp.encode(signed_transaction))
return signed_transaction