1  // Copyright (c) 2024-present 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  #ifndef BITCOIN_TEST_FUZZ_UTIL_WALLET_H
 6  #define BITCOIN_TEST_FUZZ_UTIL_WALLET_H
 7  
 8  #include <test/fuzz/FuzzedDataProvider.h>
 9  #include <test/fuzz/fuzz.h>
10  #include <test/fuzz/util.h>
11  #include <policy/policy.h>
12  #include <wallet/coincontrol.h>
13  #include <wallet/fees.h>
14  #include <wallet/spend.h>
15  #include <wallet/test/util.h>
16  #include <wallet/wallet.h>
17  
18  namespace wallet {
19  
20  /**
21   * Wraps a descriptor wallet for fuzzing.
22   */
23  struct FuzzedWallet {
24      std::shared_ptr<CWallet> wallet;
25      FuzzedWallet(interfaces::Chain& chain, const std::string& name, const std::string& seed_insecure)
26      {
27          wallet = std::make_shared<CWallet>(&chain, name, CreateMockableWalletDatabase());
28          {
29              LOCK(wallet->cs_wallet);
30              wallet->SetWalletFlag(WALLET_FLAG_DESCRIPTORS);
31              auto height{*Assert(chain.getHeight())};
32              wallet->SetLastBlockProcessed(height, chain.getBlockHash(height));
33          }
34          wallet->m_keypool_size = 1; // Avoid timeout in TopUp()
35          assert(wallet->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
36          ImportDescriptors(seed_insecure);
37      }
38      void ImportDescriptors(const std::string& seed_insecure)
39      {
40          const std::vector<std::string> DESCS{
41              "pkh(%s/%s/*)",
42              "sh(wpkh(%s/%s/*))",
43              "tr(%s/%s/*)",
44              "wpkh(%s/%s/*)",
45          };
46  
47          for (const std::string& desc_fmt : DESCS) {
48              for (bool internal : {true, false}) {
49                  const auto descriptor{strprintf(tfm::RuntimeFormat{desc_fmt}, "[5aa9973a/66h/4h/2h]" + seed_insecure, int{internal})};
50  
51                  FlatSigningProvider keys;
52                  std::string error;
53                  auto parsed_desc = std::move(Parse(descriptor, keys, error, /*require_checksum=*/false).at(0));
54                  assert(parsed_desc);
55                  assert(error.empty());
56                  assert(parsed_desc->IsRange());
57                  assert(parsed_desc->IsSingleType());
58                  assert(!keys.keys.empty());
59                  WalletDescriptor w_desc{std::move(parsed_desc), /*creation_time=*/0, /*range_start=*/0, /*range_end=*/1, /*next_index=*/0};
60                  assert(!wallet->GetDescriptorScriptPubKeyMan(w_desc));
61                  LOCK(wallet->cs_wallet);
62                  auto& spk_manager = Assert(wallet->AddWalletDescriptor(w_desc, keys, /*label=*/"", internal))->get();
63                  wallet->AddActiveScriptPubKeyMan(spk_manager.GetID(), *Assert(w_desc.descriptor->GetOutputType()), internal);
64              }
65          }
66      }
67      CTxDestination GetDestination(FuzzedDataProvider& fuzzed_data_provider)
68      {
69          auto type{fuzzed_data_provider.PickValueInArray(OUTPUT_TYPES)};
70          if (fuzzed_data_provider.ConsumeBool()) {
71              return *Assert(wallet->GetNewDestination(type, ""));
72          } else {
73              return *Assert(wallet->GetNewChangeDestination(type));
74          }
75      }
76      CScript GetScriptPubKey(FuzzedDataProvider& fuzzed_data_provider) { return GetScriptForDestination(GetDestination(fuzzed_data_provider)); }
77  };
78  }
79  
80  #endif // BITCOIN_TEST_FUZZ_UTIL_WALLET_H