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Elixir SDK for the Stellar network.
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lib/tx_build/price.ex
defmodule Stellar.TxBuild.Price do
@moduledoc """
`Price` struct definition.
"""
import Stellar.TxBuild.Utils, only: [number_to_fraction: 1]
alias StellarBase.XDR.{Int32, Price}
@behaviour Stellar.TxBuild.XDR
@type price :: non_neg_integer() | float()
@type t :: %__MODULE__{
price: price(),
numerator: non_neg_integer(),
denominator: non_neg_integer()
}
defstruct [:price, :numerator, :denominator]
@impl true
def new(price, opts \\ [])
def new(price, _opts) when is_number(price) and price > 0 do
{numerator, denominator} = number_to_fraction(price)
%__MODULE__{price: price, numerator: numerator, denominator: denominator}
end
def new(_amount, _opts), do: {:error, :invalid_price}
@impl true
def to_xdr(%__MODULE__{numerator: numerator, denominator: denominator}) do
denominator = Int32.new(denominator)
numerator
|> Int32.new()
|> Price.new(denominator)
end
end