Line data    Source code

       1             : // Copyright (c) 2009-2010 Satoshi Nakamoto
       2             : // Copyright (c) 2009-2021 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 <consensus/amount.h>
       7             : #include <policy/feerate.h>
       8             : #include <tinyformat.h>
       9             : 
      10             : #include <cmath>
      11             : 
      12      225822 : CFeeRate::CFeeRate(const CAmount& nFeePaid, uint32_t num_bytes)
      13      112911 : {
      14      112911 :     const int64_t nSize{num_bytes};
      15             : 
      16      112911 :     if (nSize > 0) {
      17      112908 :         nSatoshisPerK = nFeePaid * 1000 / nSize;
      18      112908 :     } else {
      19           3 :         nSatoshisPerK = 0;
      20             :     }
      21      225822 : }
      22             : 
      23     2975519 : CAmount CFeeRate::GetFee(uint32_t num_bytes) const
      24             : {
      25     2975519 :     const int64_t nSize{num_bytes};
      26             : 
      27             :     // Be explicit that we're converting from a double to int64_t (CAmount) here.
      28             :     // We've previously had issues with the silent double->int64_t conversion.
      29     2975519 :     CAmount nFee{static_cast<CAmount>(std::ceil(nSatoshisPerK * nSize / 1000.0))};
      30             : 
      31     2975519 :     if (nFee == 0 && nSize != 0) {
      32      104856 :         if (nSatoshisPerK > 0) nFee = CAmount(1);
      33      104856 :         if (nSatoshisPerK < 0) nFee = CAmount(-1);
      34      104856 :     }
      35             : 
      36     2975519 :     return nFee;
      37             : }
      38             : 
      39         561 : std::string CFeeRate::ToString(const FeeEstimateMode& fee_estimate_mode) const
      40             : {
      41         561 :     switch (fee_estimate_mode) {
      42         247 :     case FeeEstimateMode::DUFF_B: return strprintf("%d.%03d %s/B", nSatoshisPerK / 1000, nSatoshisPerK % 1000, CURRENCY_ATOM);
      43         314 :     default:                      return strprintf("%d.%08d %s/kB", nSatoshisPerK / COIN, nSatoshisPerK % COIN, CURRENCY_UNIT);
      44             :     }
      45         561 : }