forked from townforge/townforge
a745d7e476
to protect against the first large monero miner to merge mine being able to easily 51% the chain
83 lines
3.2 KiB
C++
83 lines
3.2 KiB
C++
// Copyright (c) 2019, Crypto City
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "gtest/gtest.h"
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#include "string_tools.h"
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#include "crypto/crypto.h"
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#include "ringct/rctOps.h"
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#include "cryptonote_basic/cryptonote_basic.h"
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#include "cryptonote_basic/stake.h"
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#define ASSERT_EX(x) do { bool ex = false; try { x; } catch(...) { ex = true; } ASSERT_TRUE(ex); } while(0)
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TEST(stake, div256_64)
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{
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crypto::hash hash, exp_hash;
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ASSERT_EX(cryptonote::div256_64(crypto::null_hash, 0, hash));
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ASSERT_EX(cryptonote::div256_64(rct::rct2hash(rct::G), 0, hash));
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cryptonote::div256_64(crypto::null_hash, 1, hash);
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ASSERT_EQ(hash, crypto::null_hash);
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hash = crypto::null_hash;
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hash.data[0] = 128;
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cryptonote::div256_64(hash, 17, hash);
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ASSERT_EQ(hash.data[0], 7);
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hash.data[0] = 0;
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ASSERT_EQ(hash, crypto::null_hash);
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hash = crypto::null_hash;
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hash.data[0] = 128;
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cryptonote::div256_64(hash, 128, hash);
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ASSERT_EQ(hash.data[0], 1);
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hash.data[0] = 0;
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ASSERT_EQ(hash, crypto::null_hash);
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hash = crypto::null_hash;
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hash.data[0] = 128;
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cryptonote::div256_64(hash, 129, hash);
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ASSERT_EQ(hash, crypto::null_hash);
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hash = crypto::null_hash;
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hash.data[0] = 0x76;
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hash.data[1] = 0x12;
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hash.data[2] = 0x7e;
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hash.data[3] = 0x0d;
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hash.data[4] = 0xca;
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cryptonote::div256_64(hash, 0xca0d7e1276, hash);
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exp_hash = crypto::null_hash;
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exp_hash.data[0] = 1;
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ASSERT_EQ(hash, exp_hash);
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ASSERT_TRUE(epee::string_tools::hex_to_pod("efcdabefcdab99887766554433221100badcfef0debc9a785634121032547698", hash));
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cryptonote::div256_64(hash, 0xe598da876a073aa8, hash);
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ASSERT_TRUE(epee::string_tools::hex_to_pod("0527af809a390ebb19d35977714152075a84464479b0fea90000000000000000", exp_hash));
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ASSERT_EQ(hash, exp_hash);
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}
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