LCOV - code coverage report
Current view: top level - src/wallet/test/fuzz - notifications.cpp (source / functions) Hit Total Coverage
Test: fuzz_coverage.info Lines: 14 114 12.3 %
Date: 2023-11-12 01:39:15 Functions: 1 17 5.9 %
Branches: 11 190 5.8 %

           Branch data     Line data    Source code
       1                 :            : // Copyright (c) 2021-2022 The Bitcoin Core developers
       2                 :            : // Distributed under the MIT software license, see the accompanying
       3                 :            : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4                 :            : 
       5                 :            : #include <kernel/chain.h>
       6                 :            : #include <test/fuzz/FuzzedDataProvider.h>
       7                 :            : #include <test/fuzz/fuzz.h>
       8                 :            : #include <test/fuzz/util.h>
       9                 :            : #include <test/util/setup_common.h>
      10                 :            : #include <util/translation.h>
      11                 :            : #include <wallet/context.h>
      12                 :            : #include <wallet/receive.h>
      13                 :            : #include <wallet/wallet.h>
      14                 :            : #include <wallet/walletdb.h>
      15                 :            : #include <wallet/walletutil.h>
      16                 :            : 
      17         [ +  - ]:          2 : #include <cassert>
      18         [ +  - ]:          2 : #include <cstdint>
      19                 :            : #include <string>
      20                 :            : #include <vector>
      21                 :            : 
      22                 :            : namespace wallet {
      23                 :            : namespace {
      24                 :            : const TestingSetup* g_setup;
      25                 :            : 
      26                 :          0 : void initialize_setup()
      27                 :          2 : {
      28 [ #  # ][ #  # ]:          0 :     static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>();
                 [ #  # ]
      29                 :          0 :     g_setup = testing_setup.get();
      30                 :          0 : }
      31                 :            : 
      32                 :            : /**
      33                 :            :  * Wraps a descriptor wallet for fuzzing. The constructor writes the sqlite db
      34                 :            :  * to disk, the destructor deletes it.
      35                 :            :  */
      36                 :            : struct FuzzedWallet {
      37                 :            :     ArgsManager args;
      38                 :            :     WalletContext context;
      39                 :            :     std::shared_ptr<CWallet> wallet;
      40         [ #  # ]:          0 :     FuzzedWallet(const std::string& name)
      41                 :            :     {
      42                 :          0 :         context.args = &args;
      43                 :          0 :         context.chain = g_setup->m_node.chain.get();
      44                 :            : 
      45                 :          0 :         DatabaseOptions options;
      46                 :          0 :         options.require_create = true;
      47                 :          0 :         options.create_flags = WALLET_FLAG_DESCRIPTORS;
      48                 :          0 :         const std::optional<bool> load_on_start;
      49 [ #  # ][ #  # ]:          0 :         gArgs.ForceSetArg("-keypool", "0"); // Avoid timeout in TopUp()
                 [ #  # ]
      50                 :            : 
      51                 :            :         DatabaseStatus status;
      52                 :          0 :         bilingual_str error;
      53         [ #  # ]:          0 :         std::vector<bilingual_str> warnings;
      54         [ #  # ]:          0 :         wallet = CreateWallet(context, name, load_on_start, options, status, error, warnings);
      55         [ #  # ]:          0 :         assert(wallet);
      56 [ #  # ][ #  # ]:          0 :         assert(error.empty());
      57         [ #  # ]:          0 :         assert(warnings.empty());
      58 [ #  # ][ #  # ]:          0 :         assert(wallet->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
      59                 :          0 :     }
      60                 :          0 :     ~FuzzedWallet()
      61                 :            :     {
      62 [ #  # ][ #  # ]:          0 :         const auto name{wallet->GetName()};
      63                 :          0 :         std::vector<bilingual_str> warnings;
      64                 :          0 :         std::optional<bool> load_on_start;
      65 [ #  # ][ #  # ]:          0 :         assert(RemoveWallet(context, wallet, load_on_start, warnings));
      66         [ #  # ]:          0 :         assert(warnings.empty());
      67         [ #  # ]:          0 :         UnloadWallet(std::move(wallet));
      68 [ #  # ][ #  # ]:          0 :         fs::remove_all(GetWalletDir() / fs::PathFromString(name));
         [ #  # ][ #  # ]
      69                 :          0 :     }
      70                 :          0 :     CScript GetScriptPubKey(FuzzedDataProvider& fuzzed_data_provider)
      71                 :            :     {
      72                 :          0 :         auto type{fuzzed_data_provider.PickValueInArray(OUTPUT_TYPES)};
      73         [ #  # ]:          0 :         util::Result<CTxDestination> op_dest{util::Error{}};
      74 [ #  # ][ #  # ]:          0 :         if (fuzzed_data_provider.ConsumeBool()) {
      75 [ #  # ][ #  # ]:          0 :             op_dest = wallet->GetNewDestination(type, "");
      76                 :          0 :         } else {
      77         [ #  # ]:          0 :             op_dest = wallet->GetNewChangeDestination(type);
      78                 :            :         }
      79 [ #  # ][ #  # ]:          0 :         return GetScriptForDestination(*Assert(op_dest));
                 [ #  # ]
      80                 :          0 :     }
      81                 :            : };
      82                 :            : 
      83         [ +  - ]:          4 : FUZZ_TARGET(wallet_notifications, .init = initialize_setup)
      84                 :            : {
      85                 :          0 :     FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
      86                 :            :     // The total amount, to be distributed to the wallets a and b in txs
      87                 :            :     // without fee. Thus, the balance of the wallets should always equal the
      88                 :            :     // total amount.
      89                 :          0 :     const auto total_amount{ConsumeMoney(fuzzed_data_provider)};
      90 [ #  # ][ #  # ]:          0 :     FuzzedWallet a{"fuzzed_wallet_a"};
      91 [ #  # ][ #  # ]:          2 :     FuzzedWallet b{"fuzzed_wallet_b"};
      92                 :            : 
      93                 :            :     // Keep track of all coins in this test.
      94                 :            :     // Each tuple in the chain represents the coins and the block created with
      95                 :            :     // those coins. Once the block is mined, the next tuple will have an empty
      96                 :            :     // block and the freshly mined coins.
      97                 :            :     using Coins = std::set<std::tuple<CAmount, COutPoint>>;
      98                 :          0 :     std::vector<std::tuple<Coins, CBlock>> chain;
      99                 :          2 :     {
     100                 :            :         // Add the initial entry
     101         [ #  # ]:          0 :         chain.emplace_back();
     102                 :          0 :         auto& [coins, block]{chain.back()};
     103 [ #  # ][ #  # ]:          0 :         coins.emplace(total_amount, COutPoint{uint256::ONE, 1});
     104                 :            :     }
     105 [ #  # ][ #  # ]:          0 :     LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 200)
                 [ #  # ]
     106                 :            :     {
     107         [ #  # ]:          0 :         CallOneOf(
     108                 :            :             fuzzed_data_provider,
     109                 :          0 :             [&] {
     110                 :          0 :                 auto& [coins_orig, block]{chain.back()};
     111                 :            :                 // Copy the coins for this block and consume all of them
     112                 :          0 :                 Coins coins = coins_orig;
     113         [ #  # ]:          0 :                 while (!coins.empty()) {
     114                 :            :                     // Create a new tx
     115         [ #  # ]:          0 :                     CMutableTransaction tx{};
     116                 :            :                     // Add some coins as inputs to it
     117         [ #  # ]:          0 :                     auto num_inputs{fuzzed_data_provider.ConsumeIntegralInRange<int>(1, coins.size())};
     118                 :          0 :                     CAmount in{0};
     119         [ #  # ]:          0 :                     while (num_inputs-- > 0) {
     120                 :          0 :                         const auto& [coin_amt, coin_outpoint]{*coins.begin()};
     121                 :          0 :                         in += coin_amt;
     122 [ #  # ][ #  # ]:          0 :                         tx.vin.emplace_back(coin_outpoint);
     123         [ #  # ]:          0 :                         coins.erase(coins.begin());
     124                 :            :                     }
     125                 :            :                     // Create some outputs spending all inputs, without fee
     126 [ #  # ][ #  # ]:          0 :                     LIMITED_WHILE(in > 0 && fuzzed_data_provider.ConsumeBool(), 100)
         [ #  # ][ #  # ]
     127                 :            :                     {
     128                 :          0 :                         const auto out_value{ConsumeMoney(fuzzed_data_provider, in)};
     129                 :          0 :                         in -= out_value;
     130 [ #  # ][ #  # ]:          0 :                         auto& wallet{fuzzed_data_provider.ConsumeBool() ? a : b};
     131 [ #  # ][ #  # ]:          0 :                         tx.vout.emplace_back(out_value, wallet.GetScriptPubKey(fuzzed_data_provider));
     132                 :          0 :                     }
     133                 :            :                     // Spend the remaining input value, if any
     134 [ #  # ][ #  # ]:          0 :                     auto& wallet{fuzzed_data_provider.ConsumeBool() ? a : b};
     135 [ #  # ][ #  # ]:          0 :                     tx.vout.emplace_back(in, wallet.GetScriptPubKey(fuzzed_data_provider));
     136                 :            :                     // Add tx to block
     137 [ #  # ][ #  # ]:          0 :                     block.vtx.emplace_back(MakeTransactionRef(tx));
     138                 :          0 :                 }
     139                 :            :                 // Mine block
     140         [ #  # ]:          0 :                 const uint256& hash = block.GetHash();
     141         [ #  # ]:          0 :                 interfaces::BlockInfo info{hash};
     142                 :          0 :                 info.prev_hash = &block.hashPrevBlock;
     143                 :          0 :                 info.height = chain.size();
     144                 :          0 :                 info.data = &block;
     145                 :            :                 // Ensure that no blocks are skipped by the wallet by setting the chain's accumulated
     146                 :            :                 // time to the maximum value. This ensures that the wallet's birth time is always
     147                 :            :                 // earlier than this maximum time.
     148                 :          0 :                 info.chain_time_max = std::numeric_limits<unsigned int>::max();
     149         [ #  # ]:          0 :                 a.wallet->blockConnected(ChainstateRole::NORMAL, info);
     150         [ #  # ]:          0 :                 b.wallet->blockConnected(ChainstateRole::NORMAL, info);
     151                 :            :                 // Store the coins for the next block
     152                 :          0 :                 Coins coins_new;
     153         [ #  # ]:          0 :                 for (const auto& tx : block.vtx) {
     154                 :          0 :                     uint32_t i{0};
     155         [ #  # ]:          0 :                     for (const auto& out : tx->vout) {
     156 [ #  # ][ #  # ]:          0 :                         coins_new.emplace(out.nValue, COutPoint{tx->GetHash(), i++});
         [ #  # ][ #  # ]
     157                 :            :                     }
     158                 :            :                 }
     159 [ #  # ][ #  # ]:          0 :                 chain.emplace_back(coins_new, CBlock{});
     160                 :          0 :             },
     161                 :          0 :             [&] {
     162         [ #  # ]:          0 :                 if (chain.size() <= 1) return; // The first entry can't be removed
     163         [ +  - ]:          2 :                 auto& [coins, block]{chain.back()};
     164 [ +  - ][ #  # ]:          2 :                 if (block.vtx.empty()) return; // Can only disconnect if the block was submitted first
     165         [ +  - ]:          2 :                 // Disconnect block
     166         [ +  - ]:          2 :                 const uint256& hash = block.GetHash();
     167         [ +  - ]:          2 :                 interfaces::BlockInfo info{hash};
     168         [ +  - ]:          2 :                 info.prev_hash = &block.hashPrevBlock;
     169         [ +  - ]:          2 :                 info.height = chain.size() - 1;
     170         [ +  - ]:          2 :                 info.data = &block;
     171                 :          0 :                 a.wallet->blockDisconnected(info);
     172                 :          0 :                 b.wallet->blockDisconnected(info);
     173                 :          0 :                 chain.pop_back();
     174                 :          0 :             });
     175                 :          0 :         auto& [coins, first_block]{chain.front()};
     176         [ #  # ]:          0 :         if (!first_block.vtx.empty()) {
     177                 :            :             // Only check balance when at least one block was submitted
     178         [ #  # ]:          0 :             const auto bal_a{GetBalance(*a.wallet).m_mine_trusted};
     179         [ #  # ]:          0 :             const auto bal_b{GetBalance(*b.wallet).m_mine_trusted};
     180         [ #  # ]:          0 :             assert(total_amount == bal_a + bal_b);
     181                 :          0 :         }
     182                 :          0 :     }
     183                 :          0 : }
     184                 :            : } // namespace
     185                 :            : } // namespace wallet

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