import warnings
from typing import Union
from ..asset import Asset
from ..call_builder.base_call_builder import BaseCallBuilder
from ..client.base_async_client import BaseAsyncClient
from ..client.base_sync_client import BaseSyncClient
[文档]class PathsCallBuilder(BaseCallBuilder):
""" Creates a new :class:`PathsCallBuilder` pointed to server defined by horizon_url.
Do not create this object directly, use :func:`stellar_sdk.server.Server.paths`.
The Stellar Network allows payments to be made across assets through path payments. A path payment specifies a
series of assets to route a payment through, from source asset (the asset debited from the payer) to destination
asset (the asset credited to the payee).
See `Find Payment Paths <https://www.stellar.org/developers/horizon/reference/endpoints/path-finding.html>`_
:param horizon_url: Horizon server URL.
:param client: The client instance used to send request.
:param source_account: The sender's account ID. Any returned path must use a source that the sender can hold.
:param destination_account: The destination account ID that any returned path should use.
:param destination_asset: The destination asset.
:param destination_amount: The amount, denominated in the destination asset, that any returned path should be able to satisfy.
"""
def __init__(
self,
horizon_url: str,
client: Union[BaseAsyncClient, BaseSyncClient],
source_account: str,
destination_account: str,
destination_asset: Asset,
destination_amount: str,
) -> None:
warnings.warn(
"Will be removed in version v3.0.0, "
"use stellar_sdk.call_builder.StrictReceivePathsCallBuilder",
DeprecationWarning,
)
super().__init__(horizon_url, client)
self.endpoint: str = "paths"
params = {
"destination_account": destination_account,
"source_account": source_account,
"destination_amount": destination_amount,
"destination_asset_type": destination_asset.type,
"destination_asset_code": None
if destination_asset.is_native()
else destination_asset.code,
"destination_asset_issuer": destination_asset.issuer,
}
self._add_query_params(params)