stellar_sdk.call_builder.trades_aggregation_call_builder 源代码

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
from ..exceptions import ValueError

[文档]class TradeAggregationsCallBuilder(BaseCallBuilder): """ Creates a new :class:`TradeAggregationsCallBuilder` pointed to server defined by horizon_url. Do not create this object directly, use :func:`stellar_sdk.server.Server.trade_aggregations`. Trade Aggregations facilitate efficient gathering of historical trade data. See `Trade Aggregations <>`_ :param horizon_url: Horizon server URL. :param client: The client instance used to send request. :param base: base asset :param counter: counter asset :param resolution: segment duration as millis since epoch. *Supported values are 1 minute (60000), 5 minutes (300000), 15 minutes (900000), 1 hour (3600000), 1 day (86400000) and 1 week (604800000).* :param start_time: lower time boundary represented as millis since epoch :param end_time: upper time boundary represented as millis since epoch :param offset: segments can be offset using this parameter. Expressed in milliseconds. *Can only be used if the resolution is greater than 1 hour. Value must be in whole hours, less than the provided resolution, and less than 24 hours.* """ def __init__( self, horizon_url: str, client: Union[BaseAsyncClient, BaseSyncClient], base: Asset, counter: Asset, resolution: int, start_time: int = None, end_time: int = None, offset: int = None, ) -> None: super().__init__(horizon_url, client) self.endpoint: str = "trade_aggregations" if not self.__is_valid_resolution(resolution): raise ValueError(f"Invalid resolution: {resolution}") if offset and not self.__is_valid_offset(offset, resolution): raise ValueError(f"Invalid offset: {offset}") params = { "base_asset_type": base.type, "base_asset_code": None if base.is_native() else base.code, "base_asset_issuer": base.issuer, "counter_asset_type": counter.type, "counter_asset_code": None if counter.is_native() else counter.code, "counter_asset_issuer": counter.issuer, "start_time": start_time, "end_time": end_time, "resolution": resolution, "offset": offset, } self._add_query_params(params) def __is_valid_offset(self, offset: int, resolution: int) -> bool: """ :param offset: Time offset in milliseconds :param resolution: Trade data resolution in milliseconds :return: `True` if the offset is allowed """ hour = 3600000 invalid = offset > resolution or offset >= 24 * hour or offset % hour != 0 return not invalid def __is_valid_resolution(self, resolution: int) -> bool: """ :param resolution: Trade data resolution in milliseconds :return: `True` if the resolution is allowed """ allowed_resolutions = (60000, 300000, 900000, 3600000, 86400000, 604800000) if resolution in allowed_resolutions: return True return False