from decimal import Decimal
from typing import Optional, Union
from .. import xdr as stellar_xdr
from ..asset import Asset
from ..muxed_account import MuxedAccount
from ..utils import raise_if_not_valid_amount
from .operation import Operation
__all__ = ["Clawback"]
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class Clawback(Operation):
"""The :class:`Clawback` object, which represents a Clawback operation on
Stellar's network.
Claws back an amount of an asset from an account.
Threshold: Medium
See `Clawback <https://developers.stellar.org/docs/start/list-of-operations/#clawback>`_ for more information.
:param asset: The asset being clawed back.
:param from_: The public key of the account to claw back from.
:param amount: The amount of the asset to claw back.
:param source: The source account for the operation. Defaults to the
transaction's source account.
"""
_XDR_OPERATION_TYPE: stellar_xdr.OperationType = stellar_xdr.OperationType.CLAWBACK
def __init__(
self,
asset: Asset,
from_: Union[MuxedAccount, str],
amount: Union[str, Decimal],
source: Optional[Union[MuxedAccount, str]] = None,
) -> None:
super().__init__(source)
if isinstance(from_, str):
from_ = MuxedAccount.from_account(from_)
self.from_: MuxedAccount = from_
self.asset: Asset = asset
self.amount: str = str(amount)
raise_if_not_valid_amount(self.amount, "amount")
def _to_operation_body(self) -> stellar_xdr.OperationBody:
asset = self.asset.to_xdr_object()
from_ = self.from_.to_xdr_object()
amount = Operation.to_xdr_amount(self.amount)
clawback_op = stellar_xdr.ClawbackOp(asset, from_, stellar_xdr.Int64(amount))
body = stellar_xdr.OperationBody(
type=self._XDR_OPERATION_TYPE, clawback_op=clawback_op
)
return body
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@classmethod
def from_xdr_object(cls, xdr_object: stellar_xdr.Operation) -> "Clawback":
"""Creates a :class:`Clawback` object from an XDR Operation
object.
"""
source = Operation.get_source_from_xdr_obj(xdr_object)
assert xdr_object.body.clawback_op is not None
asset = Asset.from_xdr_object(xdr_object.body.clawback_op.asset)
from_ = MuxedAccount.from_xdr_object(xdr_object.body.clawback_op.from_)
amount = Operation.from_xdr_amount(xdr_object.body.clawback_op.amount.int64)
op = cls(source=source, from_=from_, asset=asset, amount=amount)
return op
def __str__(self):
return f"<Clawback [asset={self.asset}, from_={self.from_}, amount={self.amount}, source={self.source}]>"