text: // Copyright (c) 2009-2010 Satoshi Nakamoto
  // Copyright (c) 2009-2014 The Bitcoin developers
  // Copyright (c) 2016-2017 The PIVX developers
  // Copyright (c) 2017 The BIG developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "wallet_ismine.h"
  
  #include "key.h"
  #include "keystore.h"
  #include "script/script.h"
  #include "script/standard.h"
  #include "util.h"
  
  #include <boost/foreach.hpp>
  
  using namespace std;
  
  typedef vector<unsigned char> valtype;
  
  unsigned int HaveKeys(const vector<valtype>& pubkeys, const CKeyStore& keystore)
  {
      unsigned int nResult = 0;
      BOOST_FOREACH (const valtype& pubkey, pubkeys) {
          CKeyID keyID = CPubKey(pubkey).GetID();
          if(keystore.HaveKey(keyID))
              ++nResult;
      }
      return nResult;
  }
  
  isminetype IsMine(const CKeyStore& keystore, const CTxDestination& dest)
  {
      CScript script = GetScriptForDestination(dest);
      return IsMine(keystore, script);
  }
  
  isminetype IsMine(const CKeyStore& keystore, const CScript& scriptPubKey)
  {
      if(keystore.HaveWatchOnly(scriptPubKey))
          return ISMINE_WATCH_ONLY;
      if(keystore.HaveMultiSig(scriptPubKey))
          return ISMINE_MULTISIG;
  
      vector<valtype> vSolutions;
      txnouttype whichType;
      if(!Solver(scriptPubKey, whichType, vSolutions)) {
          if(keystore.HaveWatchOnly(scriptPubKey))
              return ISMINE_WATCH_ONLY;
          if(keystore.HaveMultiSig(scriptPubKey))
              return ISMINE_MULTISIG;
  
          return ISMINE_NO;
      }
  
      CKeyID keyID;
      switch (whichType) {
      case TX_NONSTANDARD:
      case TX_NULL_DATA:
          break;
      case TX_ZEROCOINMINT:
      case TX_PUBKEY:
          keyID = CPubKey(vSolutions[0]).GetID();
          if(keystore.HaveKey(keyID))
              return ISMINE_SPENDABLE;
          break;
      case TX_PUBKEYHASH:
          keyID = CKeyID(uint160(vSolutions[0]));
          if(keystore.HaveKey(keyID))
              return ISMINE_SPENDABLE;
          break;
      case TX_SCRIPTHASH: {
          CScriptID scriptID = CScriptID(uint160(vSolutions[0]));
          CScript subscript;
          if(keystore.GetCScript(scriptID, subscript)) {
              isminetype ret = IsMine(keystore, subscript);
              if(ret != ISMINE_NO)
                  return ret;
          }
          break;
      }
      case TX_MULTISIG: {
          // Only consider transactions "mine" if we own ALL the
          // keys involved. multi-signature transactions that are
          // partially owned (somebody else has a key that can spend
          // them) enable spend-out-from-under-you attacks, especially
          // in shared-wallet situations.
          vector<valtype> keys(vSolutions.begin() + 1, vSolutions.begin() + vSolutions.size() - 1);
          if(HaveKeys(keys, keystore) == keys.size())
              return ISMINE_SPENDABLE;
          break;
      }
      }
  
      if(keystore.HaveWatchOnly(scriptPubKey))
          return ISMINE_WATCH_ONLY;
      if(keystore.HaveMultiSig(scriptPubKey))
          return ISMINE_MULTISIG;
  
      return ISMINE_NO;
  }
  