src/amount.cpp

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Copyright (c) 2009-2014 The Bitcoin Core developers
   3 // Distributed under the MIT software license, see the accompanying
   4 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
   5
   6 #include "amount.h"
   7
   8 #include "tinyformat.h"
   9
  10 const std::string CURRENCY_UNIT = "BTC";
  11
  12 CFeeRate::CFeeRate(const CAmount& nFeePaid, size_t nSize)
  13 {
  14     if (nSize > 0)
  15         nSatoshisPerK = nFeePaid*1000/nSize;
  16     else
  17         nSatoshisPerK = 0;
  18 }
  19
  20 CAmount CFeeRate::GetFee(size_t nSize) const
  21 {
  22     CAmount nFee = nSatoshisPerK*nSize / 1000;
  23
  24     if (nFee == 0 && nSatoshisPerK > 0)
  25         nFee = nSatoshisPerK;
  26
  27     return nFee;
  28 }
  29
  30 std::string CFeeRate::ToString() const
  31 {
  32     return strprintf("%d.%08d %s/kB", nSatoshisPerK / COIN, nSatoshisPerK % COIN, CURRENCY_UNIT);
  33 }