text: // Copyright (c) 2016-2020 The ZCash developers
  // Copyright (c) 2020 The PIVX developers
  // Copyright (c) 2021 The Real E Coin developers
  // Distributed under the MIT software license, see the accompanying
  // file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  #include "test/test_real_e_coin.h"
  
  #include "sapling/address.hpp"
  #include "sapling/note.hpp"
  #include "sapling/util.h"
  
  #include "amount.h"
  #include "random.h"
  #include <librustzcash.h>
  
  #include <array>
  #include <boost/test/unit_test.hpp>
  
  BOOST_FIXTURE_TEST_SUITE(sapling_note_tests, BasicTestingSetup)
  
  // Test data from https://github.com/zcash-hackworks/zcash-test-vectors/blob/master/sapling_key_components.py
  BOOST_AUTO_TEST_CASE(testVectors) {
      using namespace libzcash;
      uint64_t v = 0;
      uint64_t note_pos = 0;
      std::array<uint8_t, 11> diversifier{0xf1, 0x9d, 0x9b, 0x79, 0x7e, 0x39, 0xf3, 0x37, 0x44, 0x58, 0x39};
      std::vector<uint8_t> v_sk{
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00};
      std::vector<uint8_t> v_pk_d{
          0xdb, 0x4c, 0xd2, 0xb0, 0xaa, 0xc4, 0xf7, 0xeb, 0x8c, 0xa1, 0x31, 0xf1, 0x65, 0x67,
          0xc4, 0x45, 0xa9, 0x55, 0x51, 0x26, 0xd3, 0xc2, 0x9f, 0x14, 0xe3, 0xd7, 0x76, 0xe8,
          0x41, 0xae, 0x74, 0x15};
      std::vector<uint8_t> v_r{
          0x39, 0x17, 0x6d, 0xac, 0x39, 0xac, 0xe4, 0x98, 0x0e, 0xcc, 0x8d, 0x77, 0x8e, 0x89,
          0x86, 0x02, 0x55, 0xec, 0x36, 0x15, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
          0x00, 0x00, 0x00, 0x00};
      std::vector<uint8_t> v_cm{
          0xcb, 0x3c, 0xf9, 0x15, 0x32, 0x70, 0xd5, 0x7e, 0xb9, 0x14, 0xc6, 0xc2, 0xbc, 0xc0,
          0x18, 0x50, 0xc9, 0xfe, 0xd4, 0x4f, 0xce, 0x08, 0x06, 0x27, 0x8f, 0x08, 0x3e, 0xf2,
          0xdd, 0x07, 0x64, 0x39};
      std::vector<uint8_t> v_nf{
          0x44, 0xfa, 0xd6, 0x56, 0x4f, 0xfd, 0xec, 0x9f, 0xa1, 0x9c, 0x43, 0xa2, 0x8f, 0x86,
          0x1d, 0x5e, 0xbf, 0x60, 0x23, 0x46, 0x00, 0x7d, 0xe7, 0x62, 0x67, 0xd9, 0x75, 0x27,
          0x47, 0xab, 0x40, 0x63};
      uint256 sk(v_sk);
      uint256 pk_d(v_pk_d);
      uint256 r(v_r);
      uint256 cm(v_cm);
      uint256 nf(v_nf);
  
      // Test commitment
      SaplingNote note = SaplingNote(diversifier, pk_d, v, r);
      BOOST_CHECK(note.cm().get() == cm);
  
      // Test nullifier
      SaplingSpendingKey spendingKey(sk);
      BOOST_CHECK(note.nullifier(spendingKey.full_viewing_key(), note_pos) == nf);
  }
  
  BOOST_AUTO_TEST_CASE(random) {
      using namespace libzcash;
      CAmount MAX_MONEY_OUT = 21000000 * COIN;
      // Test creating random notes using the same spending key
      auto address = SaplingSpendingKey::random().default_address();
      SaplingNote note1(address, GetRand(MAX_MONEY_OUT));
      SaplingNote note2(address, GetRand(MAX_MONEY_OUT));
  
      BOOST_CHECK(note1.d == note2.d);
      BOOST_CHECK(note1.pk_d == note2.pk_d);
      BOOST_CHECK(note1.value() != note2.value());
      BOOST_CHECK(note1.r != note2.r);
  
      // Test diversifier and pk_d are not the same for different spending keys
      SaplingNote note3(SaplingSpendingKey::random().default_address(), GetRand(MAX_MONEY_OUT));
      BOOST_CHECK(note1.d != note3.d);
      BOOST_CHECK(note1.pk_d != note3.pk_d);
  }
  
  BOOST_AUTO_TEST_SUITE_END()
  