CMasternodePaymentDB::ReadResult CMasternodePaymentDB::Read(CMasternodePayments& objToLoad, bool fDryRun) { int64_t nStart = GetTimeMillis(); // open input file, and associate with CAutoFile FILE *file = fopen(pathDB.string().c_str(), "rb"); CAutoFile filein(file, SER_DISK, CLIENT_VERSION); if (filein.IsNull()) { error("%s : Failed to open file %s", __func__, pathDB.string()); return FileError; } // use file size to size memory buffer int fileSize = boost::filesystem::file_size(pathDB); int dataSize = fileSize - sizeof(uint256); // Don't try to resize to a negative number if file is small if (dataSize < 0) dataSize = 0; vector<unsigned char> vchData; vchData.resize(dataSize); uint256 hashIn; // read data and checksum from file try { filein.read((char *)&vchData[0], dataSize); filein >> hashIn; } catch (std::exception &e) { error("%s : Deserialize or I/O error - %s", __func__, e.what()); return HashReadError; } filein.fclose(); CDataStream ssObj(vchData, SER_DISK, CLIENT_VERSION); // verify stored checksum matches input data uint256 hashTmp = Hash(ssObj.begin(), ssObj.end()); if (hashIn != hashTmp) { error("%s : Checksum mismatch, data corrupted", __func__); return IncorrectHash; } unsigned char pchMsgTmp[4]; std::string strMagicMessageTmp; try { // de-serialize file header (masternode cache file specific magic message) and .. ssObj >> strMagicMessageTmp; // ... verify the message matches predefined one if (strMagicMessage != strMagicMessageTmp) { error("%s : Invalid masternode payement cache magic message", __func__); return IncorrectMagicMessage; } // de-serialize file header (network specific magic number) and .. ssObj >> FLATDATA(pchMsgTmp); // ... verify the network matches ours if (memcmp(pchMsgTmp, Params().MessageStart(), sizeof(pchMsgTmp))) { error("%s : Invalid network magic number", __func__); return IncorrectMagicNumber; } // de-serialize data into CMasternodePayments object ssObj >> objToLoad; } catch (std::exception &e) { objToLoad.Clear(); error("%s : Deserialize or I/O error - %s", __func__, e.what()); return IncorrectFormat; } LogPrintf("Loaded info from mnpayments.dat %dms\n", GetTimeMillis() - nStart); LogPrintf(" %s\n", objToLoad.ToString()); if(!fDryRun) { LogPrintf("Masternode payments manager - cleaning....\n"); objToLoad.CleanPaymentList(); LogPrintf("Masternode payments manager - result:\n"); LogPrintf(" %s\n", objToLoad.ToString()); } return Ok; }