text: // Copyright (c) 2017 The Testcoin Core developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #ifndef TESTCOIN_RPC_BLOCKCHAIN_H
  #define TESTCOIN_RPC_BLOCKCHAIN_H
  
  class CBlock;
  class CBlockIndex;
  class UniValue;
  
  /**
   * Get the difficulty of the net wrt to the given block index, or the chain tip if
   * not provided.
   *
   * @return A floating point number that is a multiple of the main net minimum
   * difficulty (4295032833 hashes).
   */
  double GetDifficulty(const CBlockIndex* blockindex = nullptr);
  
  /** Callback for when block tip changed. */
  void RPCNotifyBlockChange(bool ibd, const CBlockIndex *);
  
  /** Block description to JSON */
  UniValue blockToJSON(const CBlock& block, const CBlockIndex* blockindex, bool txDetails = false);
  
  /** Mempool information to JSON */
  UniValue mempoolInfoToJSON();
  
  /** Mempool to JSON */
  UniValue mempoolToJSON(bool fVerbose = false);
  
  /** Block header to JSON */
  UniValue blockheaderToJSON(const CBlockIndex* blockindex);
  
  #endif
  
  