mirror of
https://github.com/XRPLF/rippled.git
synced 2026-04-29 15:37:57 +00:00
2570c7df0e
Co-authored-by: Mayukha Vadari <mvadari@gmail.com> Co-authored-by: tequ <git@tequ.dev> Co-authored-by: Ed Hennis <ed@ripple.com> Co-authored-by: Shawn Xie <35279399+shawnxie999@users.noreply.github.com>
64 lines
1.9 KiB
C++
64 lines
1.9 KiB
C++
#pragma once
|
|
|
|
#include <xrpl/protocol/XRPAmount.h>
|
|
|
|
namespace xrpl {
|
|
|
|
// Deprecated constant for backwards compatibility with pre-XRPFees amendment.
|
|
// This was the reference fee units used in the old fee calculation.
|
|
inline constexpr std::uint32_t FEE_UNITS_DEPRECATED = 10;
|
|
|
|
/** Reflects the fee settings for a particular ledger.
|
|
|
|
The fees are always the same for any transactions applied
|
|
to a ledger. Changes to fees occur in between ledgers.
|
|
*/
|
|
struct Fees
|
|
{
|
|
/** @brief Cost of a reference transaction in drops. */
|
|
XRPAmount base{0};
|
|
|
|
/** @brief Minimum XRP an account must hold to exist on the ledger. */
|
|
XRPAmount reserve{0};
|
|
|
|
/** @brief Additional XRP reserve required per owned ledger object. */
|
|
XRPAmount increment{0};
|
|
|
|
explicit Fees() = default;
|
|
Fees(Fees const&) = default;
|
|
Fees&
|
|
operator=(Fees const&) = default;
|
|
|
|
Fees(XRPAmount base_, XRPAmount reserve_, XRPAmount increment_)
|
|
: base(base_), reserve(reserve_), increment(increment_)
|
|
{
|
|
}
|
|
|
|
/** Returns the account reserve given the owner count, in drops.
|
|
|
|
The reserve is calculated as the reserve base plus
|
|
the reserve increment times the number of increments.
|
|
*/
|
|
XRPAmount
|
|
accountReserve(
|
|
std::size_t ownerCount,
|
|
std::size_t sponsoredOwnerCount = 0,
|
|
std::size_t sponsoringOwnerCount = 0,
|
|
bool isAccountSponsored = false,
|
|
std::size_t sponsoringAccountCount = 0) const
|
|
{
|
|
auto const accountReserveUnits = (isAccountSponsored ? 0 : 1) + sponsoringAccountCount;
|
|
|
|
XRPL_ASSERT(
|
|
ownerCount >= sponsoredOwnerCount,
|
|
"xrpl::Fees::accountReserve : OwnerCount must be greater than or equal to "
|
|
"SponsoredOwnerCount");
|
|
|
|
auto const ownerReserveUnits = (ownerCount - sponsoredOwnerCount) + sponsoringOwnerCount;
|
|
|
|
return (reserve * accountReserveUnits) + (increment * ownerReserveUnits);
|
|
}
|
|
};
|
|
|
|
} // namespace xrpl
|