stellar_sdk.price 源代码

from .xdr import Xdr
from .utils import best_rational_approximation

__all__ = ["Price"]

[文档]class Price: """Create a new price. Price in Stellar is represented as a fraction. :param n: numerator :param d: denominator """ def __init__(self, n: int, d: int) -> None: self.n: int = n self.d: int = d
[文档] @classmethod def from_raw_price(cls, price: str) -> "Price": """Create a :class:`Price` from the given str price. :param price: the str price. (ex. `'0.125'`) :return: A new :class:`Price` object from the given str price. :raises: :exc:`NoApproximationError <stellar_sdk.exceptions.NoApproximationError>`: if the approximation could not not be found. """ best_r = best_rational_approximation(price) n = best_r["n"] d = best_r["d"] return cls(n, d)
[文档] def to_xdr_object(self) -> Xdr.types.Price: """Returns the xdr object for this price object. :return: XDR Price object """ return Xdr.types.Price(n=self.n, d=self.d)
[文档] @classmethod def from_xdr_object(cls, price_xdr_object: Xdr.types.Price) -> "Price": """Create a :class:`Price` from an XDR Asset object. :param price_xdr_object: The XDR Price object. :return: A new :class:`Price` object from the given XDR Price object. """ n = price_xdr_object.n d = price_xdr_object.d return cls(n, d)
def __eq__(self, other: object) -> bool: if not isinstance(other, self.__class__): return NotImplemented # pragma: no cover return self.n == other.n and self.d == other.d def __str__(self): return f"<Price [n={self.n}, d={self.d}]>"