text: // Copyright (c) 2012-2016, The CryptoNote developers, The Bytecoin developers
  //
  // This file is part of Bitcoinphantom.
  //
  // Bitcoinphantom is free software: you can redistribute it and/or modify
  // it under the terms of the GNU Lesser General Public License as published by
  // the Free Software Foundation, either version 3 of the License, or
  // (at your option) any later version.
  //
  // Bitcoinphantom is distributed in the hope that it will be useful,
  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  // GNU Lesser General Public License for more details.
  //
  // You should have received a copy of the GNU Lesser General Public License
  // along with Bitcoinphantom.  If not, see <http://www.gnu.org/licenses/>.
  
  #pragma once
  
  #include <vector>
  
  #include "CryptoNoteCore/Account.h"
  #include "CryptoNoteCore/CryptoNoteBasic.h"
  #include "CryptoNoteCore/CryptoNoteFormatUtils.h"
  #include "CryptoNoteCore/CryptoNoteTools.h"
  #include "crypto/crypto.h"
  
  #include "MultiTransactionTestBase.h"
  
  template<size_t a_ring_size>
  class test_check_ring_signature : private multi_tx_test_base<a_ring_size>
  {
    static_assert(0 < a_ring_size, "ring_size must be greater than 0");
  
  public:
    static const size_t loop_count = a_ring_size < 100 ? 100 : 10;
    static const size_t ring_size = a_ring_size;
  
    typedef multi_tx_test_base<a_ring_size> base_class;
  
    bool init()
    {
      using namespace CryptoNote;
  
      if (!base_class::init())
        return false;
  
      m_alice.generate();
  
      std::vector<TransactionDestinationEntry> destinations;
      destinations.push_back(TransactionDestinationEntry(this->m_source_amount, m_alice.getAccountKeys().address));
  
      if (!constructTransaction(this->m_miners[this->real_source_idx].getAccountKeys(), this->m_sources, destinations, std::vector<uint8_t>(), m_tx, 0, this->m_logger))
        return false;
  
      getObjectHash(*static_cast<TransactionPrefix*>(&m_tx), m_tx_prefix_hash);
  
      return true;
    }
  
    bool test()
    {
      const CryptoNote::KeyInput& txin = boost::get<CryptoNote::KeyInput>(m_tx.inputs[0]);
      return Crypto::check_ring_signature(m_tx_prefix_hash, txin.keyImage, this->m_public_key_ptrs, ring_size, m_tx.signatures[0].data());
    }
  
  private:
    CryptoNote::AccountBase m_alice;
    CryptoNote::Transaction m_tx;
    Crypto::Hash m_tx_prefix_hash;
  };
  