Source code for stellar_sdk.price

from decimal import Decimal
from typing import Union

from . import xdr as stellar_xdr
from .utils import best_rational_approximation

__all__ = ["Price"]

[docs]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
[docs] @classmethod def from_raw_price(cls, price: Union[str, Decimal]) -> "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(str(price)) n = best_r["n"] d = best_r["d"] return cls(n, d)
[docs] def to_xdr_object(self) -> stellar_xdr.Price: """Returns the xdr object for this price object. :return: XDR Price object """ return stellar_xdr.Price( n=stellar_xdr.Int32(self.n), d=stellar_xdr.Int32(self.d) )
[docs] @classmethod def from_xdr_object(cls, xdr_object: stellar_xdr.Price) -> "Price": """Create a :class:`Price` from an XDR Asset object. :param xdr_object: The XDR Price object. :return: A new :class:`Price` object from the given XDR Price object. """ n = xdr_object.n.int32 d = xdr_object.d.int32 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}]>"