def get_transfer_transaction( # pylint: disable=arguments-differ
self,
sender_address: Address,
destination_address: Address,
amount: int,
tx_fee: int,
tx_nonce: str,
**kwargs,
) -> Optional[Any]:
"""
Submit a transfer transaction to the ledger.
:param sender_address: the sender address of the payer.
:param destination_address: the destination address of the payee.
:param amount: the amount of wealth to be transferred.
:param tx_fee: the transaction fee.
:param tx_nonce: verifies the authenticity of the tx
:return: the transfer transaction
"""
tx = TokenTxFactory.transfer(
FetchaiAddress(sender_address),
FetchaiAddress(destination_address),
amount,
tx_fee,
[], # we don't add signer here as we would need the public key for this
)
self._api.set_validity_period(tx)
return tx
def test_handle_tx_signing_fetchai(self):
"""Test tx signing for fetchai."""
tx = TokenTxFactory.transfer(
FetchaiAddress("v3sZs7gKKz9xmoTo9yzRkfHkjYuX42MzXaq4eVjGHxrX9qu3U"),
FetchaiAddress("2bzQNV4TTjMAiKZe85EyLUttoFpHHuksRzUUBYB1brt98pMXKK"),
1,
1,
[],
)
signing_dialogues = SigningDialogues("agent1")
signing_msg = SigningMessage(
performative=SigningMessage.Performative.SIGN_TRANSACTION,
dialogue_reference=signing_dialogues.new_self_initiated_dialogue_reference(),
skill_callback_ids=(str(PublicId("author", "a_skill", "0.1.0")),),
skill_callback_info={},
terms=Terms(
ledger_id=FETCHAI,
sender_address="pk1",
counterparty_address="pk2",
amount_by_currency_id={"FET": -1},
is_sender_payable_tx_fee=True,
quantities_by_good_id={"good_id": 10},
nonce="transaction nonce",
),
raw_transaction=RawTransaction(FETCHAI, tx),
)
signing_msg.counterparty = "decision_maker"
self.decision_maker.message_in_queue.put_nowait(signing_msg)
signing_msg_response = self.decision_maker.message_out_queue.get(timeout=2)
assert (
signing_msg_response.performative
== SigningMessage.Performative.SIGNED_TRANSACTION
)
assert signing_msg_response.skill_callback_ids == signing_msg.skill_callback_ids
assert type(signing_msg_response.signed_transaction.body) == FetchaiTransaction
def is_transaction_valid(
self,
tx_digest: str,
seller: Address,
client: Address,
tx_nonce: str,
amount: int,
) -> bool:
"""
Check whether a transaction is valid or not (non-blocking).
:param seller: the address of the seller.
:param client: the address of the client.
:param tx_nonce: the transaction nonce.
:param amount: the amount we expect to get from the transaction.
:param tx_digest: the transaction digest.
:return: True if the random_message is equals to tx['input']
"""
is_valid = False
tx_contents = self._try_get_transaction(tx_digest)
if tx_contents is not None:
seller_address = FetchaiAddress(seller)
is_valid = (str(tx_contents.from_address) == client
and amount == tx_contents.transfers[seller_address]
and self.is_transaction_settled(tx_digest=tx_digest))
return is_valid
def __init__(self, private_key_path: Optional[str] = None):
"""
Instantiate a fetchai crypto object.
:param private_key_path: the private key path of the agent
"""
super().__init__(private_key_path=private_key_path)
self._address = str(FetchaiAddress(Identity.from_hex(self.public_key)))
def _try_get_balance(self, address: Address) -> Optional[int]:
"""Try get the balance."""
try:
balance = self._api.tokens.balance(FetchaiAddress(address))
except Exception as e: # pragma: no cover
logger.debug("Unable to retrieve balance: {}".format(str(e)))
balance = None
return balance
def get_address_from_public_key(cls, public_key: str) -> Address:
"""
Get the address from the public key.
:param public_key: the public key
:return: str
"""
identity = Identity.from_hex(public_key)
address = str(FetchaiAddress(identity))
return address
def _try_transfer_tokens(self, crypto: Crypto,
destination_address: Address, amount: int,
tx_fee: int) -> Optional[str]:
"""Try transfer tokens."""
try:
tx_digest = self._api.tokens.transfer(
crypto.entity, FetchaiAddress(destination_address), amount,
tx_fee)
# self._api.sync(tx_digest)
except Exception as e: # pragma: no cover
logger.debug("Error when attempting transfering tokens: {}".format(
str(e)))
tx_digest = None
return tx_digest
def _try_get_balance(self, address: Address) -> Optional[int]:
"""Try get the balance."""
return self._api.tokens.balance(FetchaiAddress(address))