from decimal import Decimal
from typing import List, Union
from .operation import Operation
from .utils import check_amount, parse_mux_account_from_account
from ..asset import Asset
from ..muxed_account import MuxedAccount
from ..xdr import Xdr
[docs]class PathPaymentStrictReceive(Operation):
"""The :class:`PathPaymentStrictReceive` object, which represents a PathPaymentStrictReceive
operation on Stellar's network.
Sends an amount in a specific asset to a destination account through a path
of offers. This allows the asset sent (e.g. 450 XLM) to be different from
the asset received (e.g. 6 BTC).
Threshold: Medium
:param destination: The destination account to send to.
:param send_asset: The asset to pay with.
:param send_max: The maximum amount of send_asset to send.
:param dest_asset: The asset the destination will receive.
:param dest_amount: The amount the destination receives.
:param path: A list of Asset objects to use as the path.
:param source: The source account for the payment. Defaults to the
transaction's source account.
"""
def __init__(
self,
destination: Union[MuxedAccount, str],
send_asset: Asset,
send_max: Union[str, Decimal],
dest_asset: Asset,
dest_amount: Union[str, Decimal],
path: List[Asset],
source: Union[MuxedAccount, str] = None,
) -> None:
super().__init__(source)
check_amount(send_max)
check_amount(dest_amount)
self.destination: MuxedAccount = parse_mux_account_from_account(destination)
self.send_asset: Asset = send_asset
self.send_max: Union[str, Decimal] = send_max
self.dest_asset: Asset = dest_asset
self.dest_amount: Union[str, Decimal] = dest_amount
self.path: List[Asset] = path # a list of paths/assets
@classmethod
def type_code(cls) -> int:
return Xdr.const.PATH_PAYMENT_STRICT_RECEIVE
def _to_operation_body(self) -> Xdr.nullclass:
destination = self.destination.to_xdr_object()
send_asset = self.send_asset.to_xdr_object()
dest_asset = self.dest_asset.to_xdr_object()
path = [asset.to_xdr_object() for asset in self.path]
path_payment_strict_receive_op = Xdr.types.PathPaymentStrictReceiveOp(
send_asset,
Operation.to_xdr_amount(self.send_max),
destination,
dest_asset,
Operation.to_xdr_amount(self.dest_amount),
path,
)
body = Xdr.nullclass()
body.type = Xdr.const.PATH_PAYMENT_STRICT_RECEIVE
body.pathPaymentStrictReceiveOp = path_payment_strict_receive_op
return body
[docs] @classmethod
def from_xdr_object(
cls, operation_xdr_object: Xdr.types.Operation
) -> "PathPaymentStrictReceive":
"""Creates a :class:`PathPaymentStrictReceive` object from an XDR Operation
object.
"""
source = Operation.get_source_from_xdr_obj(operation_xdr_object)
destination = MuxedAccount.from_xdr_object(
operation_xdr_object.body.pathPaymentStrictReceiveOp.destination
)
send_asset = Asset.from_xdr_object(
operation_xdr_object.body.pathPaymentStrictReceiveOp.sendAsset
)
dest_asset = Asset.from_xdr_object(
operation_xdr_object.body.pathPaymentStrictReceiveOp.destAsset
)
send_max = Operation.from_xdr_amount(
operation_xdr_object.body.pathPaymentStrictReceiveOp.sendMax
)
dest_amount = Operation.from_xdr_amount(
operation_xdr_object.body.pathPaymentStrictReceiveOp.destAmount
)
path = []
if operation_xdr_object.body.pathPaymentStrictReceiveOp.path:
for x in operation_xdr_object.body.pathPaymentStrictReceiveOp.path:
path.append(Asset.from_xdr_object(x))
return cls(
source=source,
destination=destination,
send_asset=send_asset,
send_max=send_max,
dest_asset=dest_asset,
dest_amount=dest_amount,
path=path,
)