from decimal import Decimal
from typing import Union
from .operation import Operation
from .utils import check_amount, check_ed25519_public_key
from ..keypair import Keypair
from ..asset import Asset
from ..utils import parse_ed25519_account_id_from_muxed_account_xdr_object
from ..xdr import Xdr
[docs]class Payment(Operation):
"""The :class:`Payment` object, which represents a Payment operation on
Stellar's network.
Sends an amount in a specific asset to a destination account.
Threshold: Medium
:param destination: The destination account ID.
:param asset: The asset to send.
:param amount: The amount to send.
:param source: The source account for the payment. Defaults to the
transaction's source account.
"""
def __init__(
self,
destination: str,
asset: Asset,
amount: Union[str, Decimal],
source: str = None,
) -> None:
super().__init__(source)
check_amount(amount)
check_ed25519_public_key(destination)
self.destination: str = destination
self.asset: Asset = asset
self.amount: Union[str, Decimal] = amount
@classmethod
def type_code(cls) -> int:
return Xdr.const.PAYMENT
def _to_operation_body(self) -> Xdr.nullclass:
asset = self.asset.to_xdr_object()
destination = Keypair.from_public_key(self.destination).xdr_muxed_account()
amount = Operation.to_xdr_amount(self.amount)
payment_op = Xdr.types.PaymentOp(destination, asset, amount)
body = Xdr.nullclass()
body.type = Xdr.const.PAYMENT
body.paymentOp = payment_op
return body
[docs] @classmethod
def from_xdr_object(cls, operation_xdr_object: Xdr.types.Operation) -> "Payment":
"""Creates a :class:`Payment` object from an XDR Operation
object.
"""
source = Operation.get_source_from_xdr_obj(operation_xdr_object)
destination = parse_ed25519_account_id_from_muxed_account_xdr_object(
operation_xdr_object.body.paymentOp.destination
)
asset = Asset.from_xdr_object(operation_xdr_object.body.paymentOp.asset)
amount = Operation.from_xdr_amount(operation_xdr_object.body.paymentOp.amount)
return cls(source=source, destination=destination, asset=asset, amount=amount)