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ex_money

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Money functions for operations on and localization of a money data type with support for ISO 4217 currencies and ISO 24165 digial tokens (crypto currencies).

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ex_money lib money protocol gringotts.ex
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lib/money/protocol/gringotts.ex 

if Cldr.Config.ensure_compiled?(Gringotts.Money) &&

     !Money.exclude_protocol_implementation(Gringotts.Money) do

  defimpl Gringotts.Money, for: Money do

    def currency(%Money{currency: currency}) do

      Atom.to_string(currency)

    end



    def value(%Money{amount: amount}) do

      amount

    end



    def to_integer(%Money{} = money) do

      {_currency, integer, exponent, _remainder} = Money.to_integer_exp(money)

      {currency(money), integer, exponent}

    end



    def to_string(%Money{} = money) do

      rounded_string =

        money

        |> Money.round()

        |> Map.get(:amount)

        |> Module.concat(Money.default_backend!(), Number).to_string!



      {currency(money), rounded_string}

    end

  end

end