1  // Copyright (c) 2022 The Bitcoin Core developers
  2  // Distributed under the MIT software license, see the accompanying
  3  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  4  
  5  #include <node/mempool_args.h>
  6  
  7  #include <kernel/mempool_limits.h>
  8  #include <kernel/mempool_options.h>
  9  
 10  #include <common/args.h>
 11  #include <common/messages.h>
 12  #include <consensus/amount.h>
 13  #include <kernel/chainparams.h>
 14  #include <logging.h>
 15  #include <policy/feerate.h>
 16  #include <policy/policy.h>
 17  #include <tinyformat.h>
 18  #include <txgraph.h>
 19  #include <util/moneystr.h>
 20  #include <util/translation.h>
 21  
 22  #include <chrono>
 23  #include <memory>
 24  
 25  using common::AmountErrMsg;
 26  using kernel::MemPoolLimits;
 27  using kernel::MemPoolOptions;
 28  
 29  //! Maximum mempool size on 32-bit systems.
 30  static constexpr int MAX_32BIT_MEMPOOL_MB{500};
 31  
 32  namespace {
 33  void ApplyArgsManOptions(const ArgsManager& argsman, MemPoolLimits& mempool_limits)
 34  {
 35      mempool_limits.cluster_count = argsman.GetIntArg("-limitclustercount", mempool_limits.cluster_count);
 36  
 37      if (auto vkb = argsman.GetIntArg("-limitclustersize")) mempool_limits.cluster_size_vbytes = *vkb * 1'000;
 38  
 39      mempool_limits.ancestor_count = argsman.GetIntArg("-limitancestorcount", mempool_limits.ancestor_count);
 40  
 41      mempool_limits.descendant_count = argsman.GetIntArg("-limitdescendantcount", mempool_limits.descendant_count);
 42  }
 43  }
 44  
 45  util::Result<void> ApplyArgsManOptions(const ArgsManager& argsman, const CChainParams& chainparams, MemPoolOptions& mempool_opts)
 46  {
 47      mempool_opts.check_ratio = argsman.GetIntArg("-checkmempool", mempool_opts.check_ratio);
 48  
 49      if (auto mb = argsman.GetIntArg("-maxmempool")) {
 50          constexpr bool is_32bit{sizeof(void*) == 4};
 51          if (is_32bit && *mb > MAX_32BIT_MEMPOOL_MB) {
 52              return util::Error{Untranslated(strprintf("-maxmempool is set to %i but can't be over %i MB on 32-bit systems", *mb, MAX_32BIT_MEMPOOL_MB))};
 53          }
 54          mempool_opts.max_size_bytes = *mb * 1'000'000;
 55      }
 56  
 57      if (auto hours = argsman.GetIntArg("-mempoolexpiry")) mempool_opts.expiry = std::chrono::hours{*hours};
 58  
 59      // incremental relay fee sets the minimum feerate increase necessary for replacement in the mempool
 60      // and the amount the mempool min fee increases above the feerate of txs evicted due to mempool limiting.
 61      if (const auto arg{argsman.GetArg("-incrementalrelayfee")}) {
 62          if (std::optional<CAmount> inc_relay_fee = ParseMoney(*arg)) {
 63              mempool_opts.incremental_relay_feerate = CFeeRate{inc_relay_fee.value()};
 64          } else {
 65              return util::Error{AmountErrMsg("incrementalrelayfee", *arg)};
 66          }
 67      }
 68  
 69      static_assert(DEFAULT_MIN_RELAY_TX_FEE == DEFAULT_INCREMENTAL_RELAY_FEE);
 70      if (const auto arg{argsman.GetArg("-minrelaytxfee")}) {
 71          if (std::optional<CAmount> min_relay_feerate = ParseMoney(*arg)) {
 72              // High fee check is done afterward in CWallet::Create()
 73              mempool_opts.min_relay_feerate = CFeeRate{min_relay_feerate.value()};
 74          } else {
 75              return util::Error{AmountErrMsg("minrelaytxfee", *arg)};
 76          }
 77      } else if (mempool_opts.incremental_relay_feerate > mempool_opts.min_relay_feerate) {
 78          // Allow only setting incremental fee to control both
 79          mempool_opts.min_relay_feerate = mempool_opts.incremental_relay_feerate;
 80          LogInfo("Increasing minrelaytxfee to %s to match incrementalrelayfee", mempool_opts.min_relay_feerate.ToString());
 81      }
 82  
 83      // Feerate used to define dust.  Shouldn't be changed lightly as old
 84      // implementations may inadvertently create non-standard transactions
 85      if (const auto arg{argsman.GetArg("-dustrelayfee")}) {
 86          if (std::optional<CAmount> parsed = ParseMoney(*arg)) {
 87              mempool_opts.dust_relay_feerate = CFeeRate{parsed.value()};
 88          } else {
 89              return util::Error{AmountErrMsg("dustrelayfee", *arg)};
 90          }
 91      }
 92  
 93      mempool_opts.permit_bare_multisig = argsman.GetBoolArg("-permitbaremultisig", DEFAULT_PERMIT_BAREMULTISIG);
 94  
 95      if (argsman.GetBoolArg("-datacarrier", DEFAULT_ACCEPT_DATACARRIER)) {
 96          mempool_opts.max_datacarrier_bytes = argsman.GetIntArg("-datacarriersize", MAX_OP_RETURN_RELAY);
 97      } else {
 98          mempool_opts.max_datacarrier_bytes = std::nullopt;
 99      }
100  
101      mempool_opts.require_standard = !argsman.GetBoolArg("-acceptnonstdtxn", DEFAULT_ACCEPT_NON_STD_TXN);
102      if (!chainparams.IsTestChain() && !mempool_opts.require_standard) {
103          return util::Error{Untranslated(strprintf("acceptnonstdtxn is not currently supported for %s chain", chainparams.GetChainTypeString()))};
104      }
105  
106      mempool_opts.persist_v1_dat = argsman.GetBoolArg("-persistmempoolv1", mempool_opts.persist_v1_dat);
107  
108      ApplyArgsManOptions(argsman, mempool_opts.limits);
109  
110      if (mempool_opts.limits.cluster_count > MAX_CLUSTER_COUNT_LIMIT) {
111          return util::Error{Untranslated(strprintf("limitclustercount must be less than or equal to %d", MAX_CLUSTER_COUNT_LIMIT))};
112      }
113  
114      return {};
115  }