1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
// Copyright (c) 2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <test/util/setup_common.h>
#include <util/translation.h>
#include <wallet/context.h>
#include <wallet/receive.h>
#include <wallet/wallet.h>
#include <wallet/walletdb.h>
#include <wallet/walletutil.h>
#include <cassert>
#include <cstdint>
#include <string>
#include <vector>
namespace wallet {
namespace {
const TestingSetup* g_setup;
void initialize_setup()
{
static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>();
g_setup = testing_setup.get();
}
/**
* Wraps a descriptor wallet for fuzzing. The constructor writes the sqlite db
* to disk, the destructor deletes it.
*/
struct FuzzedWallet {
ArgsManager args;
WalletContext context;
std::shared_ptr<CWallet> wallet;
FuzzedWallet(const std::string& name)
{
context.args = &args;
context.chain = g_setup->m_node.chain.get();
DatabaseOptions options;
options.require_create = true;
options.create_flags = WALLET_FLAG_DESCRIPTORS;
const std::optional<bool> load_on_start;
gArgs.ForceSetArg("-keypool", "0"); // Avoid timeout in TopUp()
DatabaseStatus status;
bilingual_str error;
std::vector<bilingual_str> warnings;
wallet = CreateWallet(context, name, load_on_start, options, status, error, warnings);
assert(wallet);
assert(error.empty());
assert(warnings.empty());
assert(wallet->IsWalletFlagSet(WALLET_FLAG_DESCRIPTORS));
}
~FuzzedWallet()
{
const auto name{wallet->GetName()};
std::vector<bilingual_str> warnings;
std::optional<bool> load_on_start;
assert(RemoveWallet(context, wallet, load_on_start, warnings));
assert(warnings.empty());
UnloadWallet(std::move(wallet));
fs::remove_all(GetWalletDir() / name);
}
CScript GetScriptPubKey(FuzzedDataProvider& fuzzed_data_provider)
{
auto type{fuzzed_data_provider.PickValueInArray(OUTPUT_TYPES)};
CTxDestination dest;
bilingual_str error;
if (fuzzed_data_provider.ConsumeBool()) {
assert(wallet->GetNewDestination(type, "", dest, error));
} else {
assert(wallet->GetNewChangeDestination(type, dest, error));
}
assert(error.empty());
return GetScriptForDestination(dest);
}
};
FUZZ_TARGET_INIT(wallet_notifications, initialize_setup)
{
FuzzedDataProvider fuzzed_data_provider{buffer.data(), buffer.size()};
// The total amount, to be distributed to the wallets a and b in txs
// without fee. Thus, the balance of the wallets should always equal the
// total amount.
const auto total_amount{ConsumeMoney(fuzzed_data_provider)};
FuzzedWallet a{"fuzzed_wallet_a"};
FuzzedWallet b{"fuzzed_wallet_b"};
// Keep track of all coins in this test.
// Each tuple in the chain represents the coins and the block created with
// those coins. Once the block is mined, the next tuple will have an empty
// block and the freshly mined coins.
using Coins = std::set<std::tuple<CAmount, COutPoint>>;
std::vector<std::tuple<Coins, CBlock>> chain;
{
// Add the initial entry
chain.emplace_back();
auto& [coins, block]{chain.back()};
coins.emplace(total_amount, COutPoint{uint256::ONE, 1});
}
LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 200)
{
CallOneOf(
fuzzed_data_provider,
[&] {
auto& [coins_orig, block]{chain.back()};
// Copy the coins for this block and consume all of them
Coins coins = coins_orig;
while (!coins.empty()) {
// Create a new tx
CMutableTransaction tx{};
// Add some coins as inputs to it
auto num_inputs{fuzzed_data_provider.ConsumeIntegralInRange<int>(1, coins.size())};
CAmount in{0};
while (num_inputs-- > 0) {
const auto& [coin_amt, coin_outpoint]{*coins.begin()};
in += coin_amt;
tx.vin.emplace_back(coin_outpoint);
coins.erase(coins.begin());
}
// Create some outputs spending all inputs, without fee
LIMITED_WHILE(in > 0 && fuzzed_data_provider.ConsumeBool(), 100)
{
const auto out_value{ConsumeMoney(fuzzed_data_provider, in)};
in -= out_value;
auto& wallet{fuzzed_data_provider.ConsumeBool() ? a : b};
tx.vout.emplace_back(out_value, wallet.GetScriptPubKey(fuzzed_data_provider));
}
// Spend the remaining input value, if any
auto& wallet{fuzzed_data_provider.ConsumeBool() ? a : b};
tx.vout.emplace_back(in, wallet.GetScriptPubKey(fuzzed_data_provider));
// Add tx to block
block.vtx.emplace_back(MakeTransactionRef(tx));
}
// Mine block
a.wallet->blockConnected(block, chain.size());
b.wallet->blockConnected(block, chain.size());
// Store the coins for the next block
Coins coins_new;
for (const auto& tx : block.vtx) {
uint32_t i{0};
for (const auto& out : tx->vout) {
coins_new.emplace(out.nValue, COutPoint{tx->GetHash(), i++});
}
}
chain.emplace_back(coins_new, CBlock{});
},
[&] {
if (chain.size() <= 1) return; // The first entry can't be removed
auto& [coins, block]{chain.back()};
if (block.vtx.empty()) return; // Can only disconnect if the block was submitted first
// Disconnect block
a.wallet->blockDisconnected(block, chain.size() - 1);
b.wallet->blockDisconnected(block, chain.size() - 1);
chain.pop_back();
});
auto& [coins, first_block]{chain.front()};
if (!first_block.vtx.empty()) {
// Only check balance when at least one block was submitted
const auto bal_a{GetBalance(*a.wallet).m_mine_trusted};
const auto bal_b{GetBalance(*b.wallet).m_mine_trusted};
assert(total_amount == bal_a + bal_b);
}
}
}
} // namespace
} // namespace wallet
|
