text: // Copyright (c) 2018 X-CASH Project, Derived from 2014-2018, The Monero Project
  // 
  // All rights reserved.
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  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  // 
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    conditions and the following disclaimer.
  // 
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  // 
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  // 
  // Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
  
  #pragma once 
  #include "chaingen.h"
  
  const size_t invalid_index_value = std::numeric_limits<size_t>::max();
  const uint64_t FIRST_BLOCK_REWARD = 17592186044415;
  
  
  template<class concrete_test>
  class gen_double_spend_base : public test_chain_unit_base
  {
  public:
    static const uint64_t send_amount = FIRST_BLOCK_REWARD - TESTS_DEFAULT_FEE;
  
    gen_double_spend_base();
  
    bool check_tx_verification_context(const cryptonote::tx_verification_context& tvc, bool tx_added, size_t event_idx, const cryptonote::transaction& tx);
    bool check_block_verification_context(const cryptonote::block_verification_context& bvc, size_t event_idx, const cryptonote::block& block);
  
    bool mark_last_valid_block(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
    bool mark_invalid_tx(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
    bool mark_invalid_block(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
    bool check_double_spend(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
  
  private:
    cryptonote::block m_last_valid_block;
    size_t m_invalid_tx_index;
    size_t m_invalid_block_index;
  };
  
  
  template<bool txs_keeped_by_block>
  struct gen_double_spend_in_tx : public gen_double_spend_base< gen_double_spend_in_tx<txs_keeped_by_block> >
  {
    static const uint64_t send_amount = FIRST_BLOCK_REWARD - TESTS_DEFAULT_FEE;
    static const bool has_invalid_tx = true;
    static const size_t expected_pool_txs_count = 0;
    static const uint64_t expected_bob_balance = send_amount;
    static const uint64_t expected_alice_balance = 0;
  
    bool generate(std::vector<test_event_entry>& events) const;
  };
  
  
  template<bool txs_keeped_by_block>
  struct gen_double_spend_in_the_same_block : public gen_double_spend_base< gen_double_spend_in_the_same_block<txs_keeped_by_block> >
  {
    static const uint64_t send_amount = FIRST_BLOCK_REWARD - TESTS_DEFAULT_FEE;
    static const bool has_invalid_tx = !txs_keeped_by_block;
    static const size_t expected_pool_txs_count = has_invalid_tx ? 1 : 2;
    static const uint64_t expected_bob_balance = send_amount;
    static const uint64_t expected_alice_balance = 0;
  
    bool generate(std::vector<test_event_entry>& events) const;
  };
  
  
  template<bool txs_keeped_by_block>
  struct gen_double_spend_in_different_blocks : public gen_double_spend_base< gen_double_spend_in_different_blocks<txs_keeped_by_block> >
  {
    static const uint64_t send_amount = FIRST_BLOCK_REWARD - TESTS_DEFAULT_FEE;
    static const bool has_invalid_tx = !txs_keeped_by_block;
    static const size_t expected_pool_txs_count = has_invalid_tx ? 0 : 1;
    static const uint64_t expected_bob_balance = 0;
    static const uint64_t expected_alice_balance = send_amount - TESTS_DEFAULT_FEE;
  
    bool generate(std::vector<test_event_entry>& events) const;
  };
  
  
  template<bool txs_keeped_by_block>
  struct gen_double_spend_in_alt_chain_in_the_same_block : public gen_double_spend_base< gen_double_spend_in_alt_chain_in_the_same_block<txs_keeped_by_block> >
  {
    static const uint64_t send_amount = FIRST_BLOCK_REWARD - TESTS_DEFAULT_FEE;
    static const bool has_invalid_tx = !txs_keeped_by_block;
    static const size_t expected_pool_txs_count = has_invalid_tx ? 1 : 2;
    static const uint64_t expected_bob_balance = send_amount;
    static const uint64_t expected_alice_balance = 0;
  
    bool generate(std::vector<test_event_entry>& events) const;
  };
  
  
  template<bool txs_keeped_by_block>
  struct gen_double_spend_in_alt_chain_in_different_blocks : public gen_double_spend_base< gen_double_spend_in_alt_chain_in_different_blocks<txs_keeped_by_block> >
  {
    static const uint64_t send_amount = FIRST_BLOCK_REWARD - TESTS_DEFAULT_FEE;
    static const bool has_invalid_tx = !txs_keeped_by_block;
    static const size_t expected_pool_txs_count = has_invalid_tx ? 1 : 2;
    static const uint64_t expected_bob_balance = send_amount;
    static const uint64_t expected_alice_balance = 0;
  
    bool generate(std::vector<test_event_entry>& events) const;
  };
  
  
  class gen_double_spend_in_different_chains : public test_chain_unit_base
  {
  public:
    static const uint64_t send_amount = FIRST_BLOCK_REWARD - TESTS_DEFAULT_FEE;
    static const size_t expected_blockchain_height = 4 + 2 * CRYPTONOTE_MINED_MONEY_UNLOCK_WINDOW;
  
    gen_double_spend_in_different_chains();
  
    bool generate(std::vector<test_event_entry>& events) const;
  
    bool check_double_spend(cryptonote::core& c, size_t ev_index, const std::vector<test_event_entry>& events);
  };
  
  
  #define INIT_DOUBLE_SPEND_TEST()                                           \
    uint64_t ts_start = 1338224400;                                          \
    GENERATE_ACCOUNT(miner_account);                                         \
    MAKE_GENESIS_BLOCK(events, blk_0, miner_account, ts_start);              \
    MAKE_ACCOUNT(events, bob_account);                                       \
    MAKE_ACCOUNT(events, alice_account);                                     \
    REWIND_BLOCKS(events, blk_0r, blk_0, miner_account);                     \
    MAKE_TX(events, tx_0, miner_account, bob_account, send_amount, blk_0);   \
    MAKE_NEXT_BLOCK_TX1(events, blk_1, blk_0r, miner_account, tx_0);         \
    REWIND_BLOCKS(events, blk_1r, blk_1, miner_account);
  
  
  #include "double_spend.inl"
  