Rearrange sources (#4997)

include/xrpl/protocol/Fees.h

@@ -0,0 +1,57 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2023 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_PROTOCOL_FEES_H_INCLUDED
+#define RIPPLE_PROTOCOL_FEES_H_INCLUDED
+
+#include <ripple/basics/XRPAmount.h>
+
+namespace ripple {
+
+/** 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
+{
+    XRPAmount base{0};       // Reference tx cost (drops)
+    XRPAmount reserve{0};    // Reserve base (drops)
+    XRPAmount increment{0};  // Reserve increment (drops)
+
+    explicit Fees() = default;
+    Fees(Fees const&) = default;
+    Fees&
+    operator=(Fees const&) = default;
+
+    /** 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) const
+    {
+        return reserve + ownerCount * increment;
+    }
+};
+
+}  // namespace ripple
+
+#endif