Rate.h

#pragma once
 
#include <xrpl/protocol/Asset.h>
#include <xrpl/protocol/STAmount.h>
 
#include <boost/operators.hpp>
 
#include <cstdint>
#include <ostream>
 
namespace xrpl {

struct Rate : private boost::totally_ordered<Rate>
{
    std::uint32_t value;
 
    Rate() = delete;
 
    explicit Rate(std::uint32_t rate) : value(rate)
    {
    }
};
 
inline bool
operator==(Rate const& lhs, Rate const& rhs) noexcept
{
    return lhs.value == rhs.value;
}
 
inline bool
operator<(Rate const& lhs, Rate const& rhs) noexcept
{
    return lhs.value < rhs.value;
}
 
inline std::ostream&
operator<<(std::ostream& os, Rate const& rate)
{
    os << rate.value;
    return os;
}
 
STAmount
multiply(STAmount const& amount, Rate const& rate);
 
STAmount
multiplyRound(STAmount const& amount, Rate const& rate, bool roundUp);
 
STAmount
multiplyRound(STAmount const& amount, Rate const& rate, Asset const& asset, bool roundUp);
 
STAmount
divide(STAmount const& amount, Rate const& rate);
 
STAmount
divideRound(STAmount const& amount, Rate const& rate, bool roundUp);
 
STAmount
divideRound(STAmount const& amount, Rate const& rate, Asset const& asset, bool roundUp);
 
namespace nft {
Rate
transferFeeAsRate(std::uint16_t fee);
 
}  // namespace nft

extern Rate const kParityRate;
 
}  // namespace xrpl