text: // Copyright (c) 2014-2017 The aced Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "activemasternode.h"
  #include "masternode.h"
  #include "masternode-sync.h"
  #include "masternodeman.h"
  #include "netbase.h"
  #include "protocol.h"
  
  // Keep track of the active Masternode
  CActiveMasternode activeMasternode;
  
  void CActiveMasternode::ManageState(CConnman& connman)
  {
      LogPrint("masternode", "CActiveMasternode::ManageState -- Start\n");
      if(!fMasternodeMode) {
          LogPrint("masternode", "CActiveMasternode::ManageState -- Not a masternode, returning\n");
          return;
      }
  
      if(Params().NetworkIDString() != CBaseChainParams::REGTEST && !masternodeSync.IsBlockchainSynced()) {
          nState = ACTIVE_MASTERNODE_SYNC_IN_PROCESS;
          LogPrintf("CActiveMasternode::ManageState -- %s: %s\n", GetStateString(), GetStatus());
          return;
      }
  
      if(nState == ACTIVE_MASTERNODE_SYNC_IN_PROCESS) {
          nState = ACTIVE_MASTERNODE_INITIAL;
      }
  
      LogPrint("masternode", "CActiveMasternode::ManageState -- status = %s, type = %s, pinger enabled = %d\n", GetStatus(), GetTypeString(), fPingerEnabled);
  
      if(eType == MASTERNODE_UNKNOWN) {
          ManageStateInitial(connman);
      }
  
      if(eType == MASTERNODE_REMOTE) {
          ManageStateRemote();
      }
  
      SendMasternodePing(connman);
  }
  
  std::string CActiveMasternode::GetStateString() const
  {
      switch (nState) {
          case ACTIVE_MASTERNODE_INITIAL:         return "INITIAL";
          case ACTIVE_MASTERNODE_SYNC_IN_PROCESS: return "SYNC_IN_PROCESS";
          case ACTIVE_MASTERNODE_INPUT_TOO_NEW:   return "INPUT_TOO_NEW";
          case ACTIVE_MASTERNODE_NOT_CAPABLE:     return "NOT_CAPABLE";
          case ACTIVE_MASTERNODE_STARTED:         return "STARTED";
          default:                                return "UNKNOWN";
      }
  }
  
  std::string CActiveMasternode::GetStatus() const
  {
      switch (nState) {
          case ACTIVE_MASTERNODE_INITIAL:         return "Node just started, not yet activated";
          case ACTIVE_MASTERNODE_SYNC_IN_PROCESS: return "Sync in progress. Must wait until sync is complete to start Masternode";
          case ACTIVE_MASTERNODE_INPUT_TOO_NEW:   return strprintf("Masternode input must have at least %d confirmations", Params().GetConsensus().nMasternodeMinimumConfirmations);
          case ACTIVE_MASTERNODE_NOT_CAPABLE:     return "Not capable masternode: " + strNotCapableReason;
          case ACTIVE_MASTERNODE_STARTED:         return "Masternode successfully started";
          default:                                return "Unknown";
      }
  }
  
  std::string CActiveMasternode::GetTypeString() const
  {
      std::string strType;
      switch(eType) {
      case MASTERNODE_REMOTE:
          strType = "REMOTE";
          break;
      default:
          strType = "UNKNOWN";
          break;
      }
      return strType;
  }
  
  bool CActiveMasternode::SendMasternodePing(CConnman& connman)
  {
      if(!fPingerEnabled) {
          LogPrint("masternode", "CActiveMasternode::SendMasternodePing -- %s: masternode ping service is disabled, skipping...\n", GetStateString());
          return false;
      }
  
      if(!mnodeman.Has(outpoint)) {
          strNotCapableReason = "Masternode not in masternode list";
          nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
          LogPrintf("CActiveMasternode::SendMasternodePing -- %s: %s\n", GetStateString(), strNotCapableReason);
          return false;
      }
  
      CMasternodePing mnp(outpoint);
      mnp.nSentinelVersion = nSentinelVersion;
      mnp.fSentinelIsCurrent =
              (abs(GetAdjustedTime() - nSentinelPingTime) < MASTERNODE_SENTINEL_PING_MAX_SECONDS);
      if(!mnp.Sign(keyMasternode, pubKeyMasternode)) {
          LogPrintf("CActiveMasternode::SendMasternodePing -- ERROR: Couldn't sign Masternode Ping\n");
          return false;
      }
  
      // Update lastPing for our masternode in Masternode list
      if(mnodeman.IsMasternodePingedWithin(outpoint, MASTERNODE_MIN_MNP_SECONDS, mnp.sigTime)) {
          LogPrintf("CActiveMasternode::SendMasternodePing -- Too early to send Masternode Ping\n");
          return false;
      }
  
      mnodeman.SetMasternodeLastPing(outpoint, mnp);
  
      LogPrintf("CActiveMasternode::SendMasternodePing -- Relaying ping, collateral=%s\n", outpoint.ToStringShort());
      mnp.Relay(connman);
  
      return true;
  }
  
  bool CActiveMasternode::UpdateSentinelPing(int version)
  {
      nSentinelVersion = version;
      nSentinelPingTime = GetAdjustedTime();
  
      return true;
  }
  
  void CActiveMasternode::ManageStateInitial(CConnman& connman)
  {
      LogPrint("masternode", "CActiveMasternode::ManageStateInitial -- status = %s, type = %s, pinger enabled = %d\n", GetStatus(), GetTypeString(), fPingerEnabled);
  
      // Check that our local network configuration is correct
      if (!fListen) {
          // listen option is probably overwritten by smth else, no good
          nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
          strNotCapableReason = "Masternode must accept connections from outside. Make sure listen configuration option is not overwritten by some another parameter.";
          LogPrintf("CActiveMasternode::ManageStateInitial -- %s: %s\n", GetStateString(), strNotCapableReason);
          return;
      }
  
      // First try to find whatever local address is specified by externalip option
      bool fFoundLocal = GetLocal(service) && CMasternode::IsValidNetAddr(service);
      if(!fFoundLocal) {
          bool empty = true;
          // If we have some peers, let's try to find our local address from one of them
          connman.ForEachNodeContinueIf(CConnman::AllNodes, [&fFoundLocal, &empty, this](CNode* pnode) {
              empty = false;
              if (pnode->addr.IsIPv4())
                  fFoundLocal = GetLocal(service, &pnode->addr) && CMasternode::IsValidNetAddr(service);
              return !fFoundLocal;
          });
          // nothing and no live connections, can't do anything for now
          if (empty) {
              nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
              strNotCapableReason = "Can't detect valid external address. Will retry when there are some connections available.";
              LogPrintf("CActiveMasternode::ManageStateInitial -- %s: %s\n", GetStateString(), strNotCapableReason);
              return;
          }
      }
  
      if(!fFoundLocal) {
          nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
          strNotCapableReason = "Can't detect valid external address. Please consider using the externalip configuration option if problem persists. Make sure to use IPv4 address only.";
          LogPrintf("CActiveMasternode::ManageStateInitial -- %s: %s\n", GetStateString(), strNotCapableReason);
          return;
      }
  
      int mainnetDefaultPort = Params(CBaseChainParams::MAIN).GetDefaultPort();
      if(Params().NetworkIDString() == CBaseChainParams::MAIN) {
          if(service.GetPort() != mainnetDefaultPort) {
              nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
              strNotCapableReason = strprintf("Invalid port: %u - only %d is supported on mainnet.", service.GetPort(), mainnetDefaultPort);
              LogPrintf("CActiveMasternode::ManageStateInitial -- %s: %s\n", GetStateString(), strNotCapableReason);
              return;
          }
      } else if(service.GetPort() == mainnetDefaultPort) {
          nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
          strNotCapableReason = strprintf("Invalid port: %u - %d is only supported on mainnet.", service.GetPort(), mainnetDefaultPort);
          LogPrintf("CActiveMasternode::ManageStateInitial -- %s: %s\n", GetStateString(), strNotCapableReason);
          return;
      }
  
      // Check socket connectivity
      LogPrintf("CActiveMasternode::ManageStateInitial -- Checking inbound connection to '%s'\n", service.ToString());
      SOCKET hSocket;
      bool fConnected = ConnectSocket(service, hSocket, nConnectTimeout) && IsSelectableSocket(hSocket);
      CloseSocket(hSocket);
  
      if (!fConnected) {
          nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
          strNotCapableReason = "Could not connect to " + service.ToString();
          LogPrintf("CActiveMasternode::ManageStateInitial -- %s: %s\n", GetStateString(), strNotCapableReason);
          return;
      }
  
      // Default to REMOTE
      eType = MASTERNODE_REMOTE;
  
      LogPrint("masternode", "CActiveMasternode::ManageStateInitial -- End status = %s, type = %s, pinger enabled = %d\n", GetStatus(), GetTypeString(), fPingerEnabled);
  }
  
  void CActiveMasternode::ManageStateRemote()
  {
      LogPrint("masternode", "CActiveMasternode::ManageStateRemote -- Start status = %s, type = %s, pinger enabled = %d, pubKeyMasternode.GetID() = %s\n", 
               GetStatus(), GetTypeString(), fPingerEnabled, pubKeyMasternode.GetID().ToString());
  
      mnodeman.CheckMasternode(pubKeyMasternode, true);
      masternode_info_t infoMn;
      if(mnodeman.GetMasternodeInfo(pubKeyMasternode, infoMn)) {
          if(infoMn.nProtocolVersion != PROTOCOL_VERSION) {
              nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
              strNotCapableReason = "Invalid protocol version";
              LogPrintf("CActiveMasternode::ManageStateRemote -- %s: %s\n", GetStateString(), strNotCapableReason);
              return;
          }
          if(service != infoMn.addr) {
              nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
              strNotCapableReason = "Broadcasted IP doesn't match our external address. Make sure you issued a new broadcast if IP of this masternode changed recently.";
              LogPrintf("CActiveMasternode::ManageStateRemote -- %s: %s\n", GetStateString(), strNotCapableReason);
              return;
          }
          if(!CMasternode::IsValidStateForAutoStart(infoMn.nActiveState)) {
              nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
              strNotCapableReason = strprintf("Masternode in %s state", CMasternode::StateToString(infoMn.nActiveState));
              LogPrintf("CActiveMasternode::ManageStateRemote -- %s: %s\n", GetStateString(), strNotCapableReason);
              return;
          }
          if(nState != ACTIVE_MASTERNODE_STARTED) {
              LogPrintf("CActiveMasternode::ManageStateRemote -- STARTED!\n");
              outpoint = infoMn.outpoint;
              service = infoMn.addr;
              fPingerEnabled = true;
              nState = ACTIVE_MASTERNODE_STARTED;
          }
      }
      else {
          nState = ACTIVE_MASTERNODE_NOT_CAPABLE;
          strNotCapableReason = "Masternode not in masternode list";
          LogPrintf("CActiveMasternode::ManageStateRemote -- %s: %s\n", GetStateString(), strNotCapableReason);
      }
  }
  