text: //------------------------------------------------------------------------------
  /*
      This file is part of rippled: https://github.com/ripple/rippled
      Copyright (c) 2012, 2013 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.
  */
  //==============================================================================
  
  #include <BeastConfig.h>
  #include <ripple/app/tx/impl/SetRegularKey.h>
  #include <ripple/basics/Log.h>
  #include <ripple/protocol/TxFlags.h>
  #include <ripple/protocol/types.h>
  
  namespace ripple {
  
  std::uint64_t
  SetRegularKey::calculateBaseFee (
      PreclaimContext const& ctx)
  {
      auto const id = ctx.tx.getAccountID(sfAccount);
      auto const pk =
          RippleAddress::createAccountPublic(
              ctx.tx.getSigningPubKey());
  
      auto const sle = ctx.view.read(
          keylet::account(id));
      if ( sle
              && (! (sle->getFlags () & lsfPasswordSpent))
              && (calcAccountID(pk) == id))
      {
          // flag is armed and they signed with the right account
          return 0;
      }
  
      return Transactor::calculateBaseFee (ctx);
  }
  
  TER
  SetRegularKey::preflight (PreflightContext const& ctx)
  {
      auto const ret = preflight1 (ctx);
      if (!isTesSuccess (ret))
          return ret;
  
      std::uint32_t const uTxFlags = ctx.tx.getFlags ();
  
      if (uTxFlags & tfUniversalMask)
      {
          JLOG(ctx.j.trace) <<
              "Malformed transaction: Invalid flags set.";
  
          return temINVALID_FLAG;
      }
  
      return preflight2(ctx);
  }
  
  TER
  SetRegularKey::doApply ()
  {
      auto const sle = view().peek(
          keylet::account(account_));
  
      if (mFeeDue == zero)
          sle->setFlag (lsfPasswordSpent);
  
      if (ctx_.tx.isFieldPresent (sfRegularKey))
      {
          sle->setAccountID (sfRegularKey,
              ctx_.tx.getAccountID (sfRegularKey));
      }
      else
      {
          if (sle->isFlag (lsfDisableMaster) &&
              !view().peek (keylet::signers (account_)))
              // Account has disabled master key and no multi-signer signer list.
              return tecNO_ALTERNATIVE_KEY;
  
          sle->makeFieldAbsent (sfRegularKey);
      }
  
      return tesSUCCESS;
  }
  
  }
  