/root/bitcoin/src/test/fuzz/util.cpp

Source
// Copyright (c) 2021-present 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 <consensus/amount.h>
#include <pubkey.h>
#include <test/fuzz/util.h>
#include <test/util/script.h>
#include <util/check.h>
#include <util/overflow.h>
#include <util/rbf.h>
#include <util/time.h>

#include <memory>

std::vector<uint8_t> ConstructPubKeyBytes(FuzzedDataProvider& fuzzed_data_provider, std::span<const uint8_t> byte_data, const bool compressed) noexcept
{
    uint8_t pk_type;
    if (compressed) {
        pk_type = fuzzed_data_provider.PickValueInArray({0x02, 0x03});
    } else {
        pk_type = fuzzed_data_provider.PickValueInArray({0x04, 0x06, 0x07});
    }
    std::vector<uint8_t> pk_data{byte_data.begin(), byte_data.begin() + (compressed ? CPubKey::COMPRESSED_SIZE : CPubKey::SIZE)};
    pk_data[0] = pk_type;
    return pk_data;
}

CAmount ConsumeMoney(FuzzedDataProvider& fuzzed_data_provider, const std::optional<CAmount>& max) noexcept
{
    return fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(0, max.value_or(MAX_MONEY));
}

NodeSeconds ConsumeTime(FuzzedDataProvider& fuzzed_data_provider, const std::optional<int64_t>& min, const std::optional<int64_t>& max) noexcept
{
    // Avoid t=0 (1970-01-01T00:00:00Z) since SetMockTime(0) disables mocktime.
    static const int64_t time_min{ParseISO8601DateTime("2000-01-01T00:00:01Z").value()};
    static const int64_t time_max{ParseISO8601DateTime("2100-12-31T23:59:59Z").value()};
    return NodeSeconds{ConsumeDuration<std::chrono::seconds>(fuzzed_data_provider, min.value_or(time_min) * 1s, max.value_or(time_max) * 1s)};
}

CMutableTransaction ConsumeTransaction(FuzzedDataProvider& fuzzed_data_provider, const std::optional<std::vector<Txid>>& prevout_txids, const int max_num_in, const int max_num_out) noexcept
{
    CMutableTransaction tx_mut;
    const auto p2wsh_op_true = fuzzed_data_provider.ConsumeBool();
    tx_mut.version = fuzzed_data_provider.ConsumeBool() ?
                          CTransaction::CURRENT_VERSION :
                          fuzzed_data_provider.ConsumeIntegral<uint32_t>();
    tx_mut.nLockTime = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
    const auto num_in = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, max_num_in);
    const auto num_out = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, max_num_out);
    for (int i = 0; i < num_in; ++i) {
        const auto& txid_prev = prevout_txids ?
                                    PickValue(fuzzed_data_provider, *prevout_txids) :
                                    Txid::FromUint256(ConsumeUInt256(fuzzed_data_provider));
        const auto index_out = fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(0, max_num_out);
        const auto sequence = ConsumeSequence(fuzzed_data_provider);
        const auto script_sig = p2wsh_op_true ? CScript{} : ConsumeScript(fuzzed_data_provider);
        CScriptWitness script_wit;
        if (p2wsh_op_true) {
            script_wit.stack = std::vector<std::vector<uint8_t>>{WITNESS_STACK_ELEM_OP_TRUE};
        } else {
            script_wit = ConsumeScriptWitness(fuzzed_data_provider);
        }
        CTxIn in;
        in.prevout = COutPoint{txid_prev, index_out};
        in.nSequence = sequence;
        in.scriptSig = script_sig;
        in.scriptWitness = script_wit;

        tx_mut.vin.push_back(in);
    }
    for (int i = 0; i < num_out; ++i) {
        const auto amount = fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(-10, 50 * COIN + 10);
        const auto script_pk = p2wsh_op_true ?
                                   P2WSH_OP_TRUE :
                                   ConsumeScript(fuzzed_data_provider, /*maybe_p2wsh=*/true);
        tx_mut.vout.emplace_back(amount, script_pk);
    }
    return tx_mut;
}

CScriptWitness ConsumeScriptWitness(FuzzedDataProvider& fuzzed_data_provider, const size_t max_stack_elem_size) noexcept
{
    CScriptWitness ret;
    const auto n_elements = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, max_stack_elem_size);
    for (size_t i = 0; i < n_elements; ++i) {
        ret.stack.push_back(ConsumeRandomLengthByteVector(fuzzed_data_provider));
    }
    return ret;
}

CScript ConsumeScript(FuzzedDataProvider& fuzzed_data_provider, const bool maybe_p2wsh) noexcept
{
    CScript r_script{};
    {
        // Keep a buffer of bytes to allow the fuzz engine to produce smaller
        // inputs to generate CScripts with repeated data.
        static constexpr unsigned MAX_BUFFER_SZ{128};
        std::vector<uint8_t> buffer(MAX_BUFFER_SZ, uint8_t{'a'});
        while (fuzzed_data_provider.ConsumeBool()) {
            CallOneOf(
                fuzzed_data_provider,
                [&] {
                    // Insert byte vector directly to allow malformed or unparsable scripts
                    r_script.insert(r_script.end(), buffer.begin(), buffer.begin() + fuzzed_data_provider.ConsumeIntegralInRange(0U, MAX_BUFFER_SZ));
                },
                [&] {
                    // Push a byte vector from the buffer
                    r_script << std::vector<uint8_t>{buffer.begin(), buffer.begin() + fuzzed_data_provider.ConsumeIntegralInRange(0U, MAX_BUFFER_SZ)};
                },
                [&] {
                    // Push multisig
                    // There is a special case for this to aid the fuzz engine
                    // navigate the highly structured multisig format.
                    r_script << fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(0, 22);
                    int num_data{fuzzed_data_provider.ConsumeIntegralInRange(1, 22)};
                    while (num_data--) {
                        auto pubkey_bytes{ConstructPubKeyBytes(fuzzed_data_provider, buffer, fuzzed_data_provider.ConsumeBool())};
                        if (fuzzed_data_provider.ConsumeBool()) {
                            pubkey_bytes.back() = num_data; // Make each pubkey different
                        }
                        r_script << pubkey_bytes;
                    }
                    r_script << fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(0, 22);
                },
                [&] {
                    // Mutate the buffer
                    const auto vec{ConsumeRandomLengthByteVector(fuzzed_data_provider, /*max_length=*/MAX_BUFFER_SZ)};
                    std::copy(vec.begin(), vec.end(), buffer.begin());
                },
                [&] {
                    // Push an integral
                    r_script << fuzzed_data_provider.ConsumeIntegral<int64_t>();
                },
                [&] {
                    // Push an opcode
                    r_script << ConsumeOpcodeType(fuzzed_data_provider);
                },
                [&] {
                    // Push a scriptnum
                    r_script << ConsumeScriptNum(fuzzed_data_provider);
                });
        }
    }
    if (maybe_p2wsh && fuzzed_data_provider.ConsumeBool()) {
        uint256 script_hash;
        CSHA256().Write(r_script.data(), r_script.size()).Finalize(script_hash.begin());
        r_script.clear();
        r_script << OP_0 << ToByteVector(script_hash);
    }
    return r_script;
}

uint32_t ConsumeSequence(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
    return fuzzed_data_provider.ConsumeBool() ?
               fuzzed_data_provider.PickValueInArray({
                   CTxIn::SEQUENCE_FINAL,
                   CTxIn::MAX_SEQUENCE_NONFINAL,
                   MAX_BIP125_RBF_SEQUENCE,
               }) :
               fuzzed_data_provider.ConsumeIntegral<uint32_t>();
}

std::map<COutPoint, Coin> ConsumeCoins(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
    std::map<COutPoint, Coin> coins;
    LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
        const std::optional<COutPoint> outpoint{ConsumeDeserializable<COutPoint>(fuzzed_data_provider)};
        if (!outpoint) {
            break;
        }
        const std::optional<Coin> coin{ConsumeDeserializable<Coin>(fuzzed_data_provider)};
        if (!coin) {
            break;
        }
        coins[*outpoint] = *coin;
    }

    return coins;
}

CTxDestination ConsumeTxDestination(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
    CTxDestination tx_destination;
    const size_t call_size{CallOneOf(
        fuzzed_data_provider,
        [&] {
            tx_destination = CNoDestination{};
        },
        [&] {
            bool compressed = fuzzed_data_provider.ConsumeBool();
            CPubKey pk{ConstructPubKeyBytes(
                    fuzzed_data_provider,
                    ConsumeFixedLengthByteVector(fuzzed_data_provider, (compressed ? CPubKey::COMPRESSED_SIZE : CPubKey::SIZE)),
                    compressed
            )};
            tx_destination = PubKeyDestination{pk};
        },
        [&] {
            tx_destination = PKHash{ConsumeUInt160(fuzzed_data_provider)};
        },
        [&] {
            tx_destination = ScriptHash{ConsumeUInt160(fuzzed_data_provider)};
        },
        [&] {
            tx_destination = WitnessV0ScriptHash{ConsumeUInt256(fuzzed_data_provider)};
        },
        [&] {
            tx_destination = WitnessV0KeyHash{ConsumeUInt160(fuzzed_data_provider)};
        },
        [&] {
            tx_destination = WitnessV1Taproot{XOnlyPubKey{ConsumeUInt256(fuzzed_data_provider)}};
        },
        [&] {
            tx_destination = PayToAnchor{};
        },
        [&] {
            std::vector<unsigned char> program{ConsumeRandomLengthByteVector(fuzzed_data_provider, /*max_length=*/40)};
            if (program.size() < 2) {
                program = {0, 0};
            }
            tx_destination = WitnessUnknown{fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(2, 16), program};
        })};
    Assert(call_size == std::variant_size_v<CTxDestination>);
    return tx_destination;
}

CKey ConsumePrivateKey(FuzzedDataProvider& fuzzed_data_provider, std::optional<bool> compressed) noexcept
{
    auto key_data = fuzzed_data_provider.ConsumeBytes<uint8_t>(32);
    key_data.resize(32);
    CKey key;
    bool compressed_value = compressed ? *compressed : fuzzed_data_provider.ConsumeBool();
    key.Set(key_data.begin(), key_data.end(), compressed_value);
    return key;
}

UniValue ConsumeUniValue(FuzzedDataProvider& fuzzed_data_provider) noexcept
{
    UniValue value{UniValue::VOBJ};
    value.pushKV("bool", fuzzed_data_provider.ConsumeBool());
    value.pushKV("number", fuzzed_data_provider.ConsumeIntegralInRange<int>(-1'000'000, 1'000'000));
    value.pushKV("string", "ipc fuzz");

    return value;
}

bool ContainsSpentInput(const CTransaction& tx, const CCoinsViewCache& inputs) noexcept
{
    for (const CTxIn& tx_in : tx.vin) {
        const Coin& coin = inputs.AccessCoin(tx_in.prevout);
        if (coin.IsSpent()) {
            return true;
        }
    }
    return false;
}

FILE* FuzzedFileProvider::open()
{
    SetFuzzedErrNo(m_fuzzed_data_provider);
    if (m_fuzzed_data_provider.ConsumeBool()) {
        return nullptr;
    }
    std::string mode;
    CallOneOf(
        m_fuzzed_data_provider,
        [&] {
            mode = "r";
        },
        [&] {
            mode = "r+";
        },
        [&] {
            mode = "w";
        },
        [&] {
            mode = "w+";
        },
        [&] {
            mode = "a";
        },
        [&] {
            mode = "a+";
        });
#if defined _GNU_SOURCE && (defined(__linux__) || defined(__FreeBSD__))
    const cookie_io_functions_t io_hooks = {
        FuzzedFileProvider::read,
        FuzzedFileProvider::write,
        FuzzedFileProvider::seek,
        FuzzedFileProvider::close,
    };
    return fopencookie(this, mode.c_str(), io_hooks);
#else
    (void)mode;
    return nullptr;
#endif
}

ssize_t FuzzedFileProvider::read(void* cookie, char* buf, size_t size)
{
    FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
    SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
    if (buf == nullptr || size == 0 || fuzzed_file->m_fuzzed_data_provider.ConsumeBool()) {
        return fuzzed_file->m_fuzzed_data_provider.ConsumeBool() ? 0 : -1;
    }
    const std::vector<uint8_t> random_bytes = fuzzed_file->m_fuzzed_data_provider.ConsumeBytes<uint8_t>(size);
    if (random_bytes.empty()) {
        return 0;
    }
    std::memcpy(buf, random_bytes.data(), random_bytes.size());
    if (AdditionOverflow(fuzzed_file->m_offset, (int64_t)random_bytes.size())) {
        return fuzzed_file->m_fuzzed_data_provider.ConsumeBool() ? 0 : -1;
    }
    fuzzed_file->m_offset += random_bytes.size();
    return random_bytes.size();
}

ssize_t FuzzedFileProvider::write(void* cookie, const char* buf, size_t size)
{
    FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
    SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
    const ssize_t n = fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<ssize_t>(0, size);
    if (AdditionOverflow(fuzzed_file->m_offset, (int64_t)n)) {
        return 0;
    }
    fuzzed_file->m_offset += n;
    return n;
}

int FuzzedFileProvider::seek(void* cookie, int64_t* offset, int whence)
{
    assert(whence == SEEK_SET || whence == SEEK_CUR || whence == SEEK_END);
    FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
    SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
    int64_t new_offset = 0;
    if (whence == SEEK_SET) {
        new_offset = *offset;
    } else if (whence == SEEK_CUR) {
        if (AdditionOverflow(fuzzed_file->m_offset, *offset)) {
            return -1;
        }
        new_offset = fuzzed_file->m_offset + *offset;
    } else if (whence == SEEK_END) {
        const int64_t n = fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(0, 4096);
        if (AdditionOverflow(n, *offset)) {
            return -1;
        }
        new_offset = n + *offset;
    }
    if (new_offset < 0) {
        return -1;
    }
    fuzzed_file->m_offset = new_offset;
    *offset = new_offset;
    return fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int>(-1, 0);
}

int FuzzedFileProvider::close(void* cookie)
{
    FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
    SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
    return fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int>(-1, 0);
}

Coverage Report

Created: 2026-07-01 15:07

Line	Count	Source
1		// Copyright (c) 2021-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		#include <consensus/amount.h>
6		#include <pubkey.h>
7		#include <test/fuzz/util.h>
8		#include <test/util/script.h>
9		#include <util/check.h>
10		#include <util/overflow.h>
11		#include <util/rbf.h>
12		#include <util/time.h>
13
14		#include <memory>
15
16		std::vector<uint8_t> ConstructPubKeyBytes(FuzzedDataProvider& fuzzed_data_provider, std::span<const uint8_t> byte_data, const bool compressed) noexcept
17	3.32k	{
18	3.32k	uint8_t pk_type;
19	3.32k	if (compressed) { Branch (19:9): [True: 1.74k, False: 1.57k]
20	1.74k	pk_type = fuzzed_data_provider.PickValueInArray({0x02, 0x03});
21	1.74k	} else {
22	1.57k	pk_type = fuzzed_data_provider.PickValueInArray({0x04, 0x06, 0x07});
23	1.57k	}
24	3.32k	std::vector<uint8_t> pk_data{byte_data.begin(), byte_data.begin() + (compressed ? CPubKey::COMPRESSED_SIZE : CPubKey::SIZE)}; Branch (24:74): [True: 1.74k, False: 1.57k]
25	3.32k	pk_data[0] = pk_type;
26	3.32k	return pk_data;
27	3.32k	}
28
29		CAmount ConsumeMoney(FuzzedDataProvider& fuzzed_data_provider, const std::optional<CAmount>& max) noexcept
30	0	{
31	0	return fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(0, max.value_or(MAX_MONEY));
32	0	}
33
34		NodeSeconds ConsumeTime(FuzzedDataProvider& fuzzed_data_provider, const std::optional<int64_t>& min, const std::optional<int64_t>& max) noexcept
35	0	{
36		// Avoid t=0 (1970-01-01T00:00:00Z) since SetMockTime(0) disables mocktime.
37	0	static const int64_t time_min{ParseISO8601DateTime("2000-01-01T00:00:01Z").value()};
38	0	static const int64_t time_max{ParseISO8601DateTime("2100-12-31T23:59:59Z").value()};
39	0	return NodeSeconds{ConsumeDuration<std::chrono::seconds>(fuzzed_data_provider, min.value_or(time_min) * 1s, max.value_or(time_max) * 1s)};
40	0	}
41
42		CMutableTransaction ConsumeTransaction(FuzzedDataProvider& fuzzed_data_provider, const std::optional<std::vector<Txid>>& prevout_txids, const int max_num_in, const int max_num_out) noexcept
43	910	{
44	910	CMutableTransaction tx_mut;
45	910	const auto p2wsh_op_true = fuzzed_data_provider.ConsumeBool();
46	910	tx_mut.version = fuzzed_data_provider.ConsumeBool() ? Branch (46:22): [True: 735, False: 175]
47	735	CTransaction::CURRENT_VERSION :
48	910	fuzzed_data_provider.ConsumeIntegral<uint32_t>();
49	910	tx_mut.nLockTime = fuzzed_data_provider.ConsumeIntegral<uint32_t>();
50	910	const auto num_in = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, max_num_in);
51	910	const auto num_out = fuzzed_data_provider.ConsumeIntegralInRange<int>(0, max_num_out);
52	2.95k	for (int i = 0; i < num_in; ++i) { Branch (52:21): [True: 2.04k, False: 910]
53	2.04k	const auto& txid_prev = prevout_txids ? Branch (53:33): [True: 0, False: 2.04k]
54	0	PickValue(fuzzed_data_provider, *prevout_txids) :
55	2.04k	Txid::FromUint256(ConsumeUInt256(fuzzed_data_provider));
56	2.04k	const auto index_out = fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(0, max_num_out);
57	2.04k	const auto sequence = ConsumeSequence(fuzzed_data_provider);
58	2.04k	const auto script_sig = p2wsh_op_true ? CScript{} : ConsumeScript(fuzzed_data_provider); Branch (58:33): [True: 876, False: 1.17k]
59	2.04k	CScriptWitness script_wit;
60	2.04k	if (p2wsh_op_true) { Branch (60:13): [True: 876, False: 1.17k]
61	876	script_wit.stack = std::vector<std::vector<uint8_t>>{WITNESS_STACK_ELEM_OP_TRUE};
62	1.17k	} else {
63	1.17k	script_wit = ConsumeScriptWitness(fuzzed_data_provider);
64	1.17k	}
65	2.04k	CTxIn in;
66	2.04k	in.prevout = COutPoint{txid_prev, index_out};
67	2.04k	in.nSequence = sequence;
68	2.04k	in.scriptSig = script_sig;
69	2.04k	in.scriptWitness = script_wit;
70
71	2.04k	tx_mut.vin.push_back(in);
72	2.04k	}
73	4.24k	for (int i = 0; i < num_out; ++i) { Branch (73:21): [True: 3.33k, False: 910]
74	3.33k	const auto amount = fuzzed_data_provider.ConsumeIntegralInRange<CAmount>(-10, 50 * COIN + 10);
75	3.33k	const auto script_pk = p2wsh_op_true ? Branch (75:32): [True: 1.39k, False: 1.94k]
76	1.39k	P2WSH_OP_TRUE :
77	3.33k	ConsumeScript(fuzzed_data_provider, /maybe_p2wsh=/true);
78	3.33k	tx_mut.vout.emplace_back(amount, script_pk);
79	3.33k	}
80	910	return tx_mut;
81	910	}
82
83		CScriptWitness ConsumeScriptWitness(FuzzedDataProvider& fuzzed_data_provider, const size_t max_stack_elem_size) noexcept
84	1.17k	{
85	1.17k	CScriptWitness ret;
86	1.17k	const auto n_elements = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, max_stack_elem_size);
87	3.78k	for (size_t i = 0; i < n_elements; ++i) { Branch (87:24): [True: 2.61k, False: 1.17k]
88	2.61k	ret.stack.push_back(ConsumeRandomLengthByteVector(fuzzed_data_provider));
89	2.61k	}
90	1.17k	return ret;
91	1.17k	}
92
93		CScript ConsumeScript(FuzzedDataProvider& fuzzed_data_provider, const bool maybe_p2wsh) noexcept
94	6.05k	{
95	6.05k	CScript r_script{};
96	6.05k	{
97		// Keep a buffer of bytes to allow the fuzz engine to produce smaller
98		// inputs to generate CScripts with repeated data.
99	6.05k	static constexpr unsigned MAX_BUFFER_SZ{128};
100	6.05k	std::vector<uint8_t> buffer(MAX_BUFFER_SZ, uint8_t{'a'});
101	16.1k	while (fuzzed_data_provider.ConsumeBool()) { Branch (101:16): [True: 10.1k, False: 6.05k]
102	10.1k	CallOneOf(
103	10.1k	fuzzed_data_provider,
104	10.1k	[&] {
105		// Insert byte vector directly to allow malformed or unparsable scripts
106	3.74k	r_script.insert(r_script.end(), buffer.begin(), buffer.begin() + fuzzed_data_provider.ConsumeIntegralInRange(0U, MAX_BUFFER_SZ));
107	3.74k	},
108	10.1k	[&] {
109		// Push a byte vector from the buffer
110	3.29k	r_script << std::vector<uint8_t>{buffer.begin(), buffer.begin() + fuzzed_data_provider.ConsumeIntegralInRange(0U, MAX_BUFFER_SZ)};
111	3.29k	},
112	10.1k	[&] {
113		// Push multisig
114		// There is a special case for this to aid the fuzz engine
115		// navigate the highly structured multisig format.
116	720	r_script << fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(0, 22);
117	720	int num_data{fuzzed_data_provider.ConsumeIntegralInRange(1, 22)};
118	4.04k	while (num_data--) { Branch (118:28): [True: 3.32k, False: 720]
119	3.32k	auto pubkey_bytes{ConstructPubKeyBytes(fuzzed_data_provider, buffer, fuzzed_data_provider.ConsumeBool())};
120	3.32k	if (fuzzed_data_provider.ConsumeBool()) { Branch (120:29): [True: 1.59k, False: 1.72k]
121	1.59k	pubkey_bytes.back() = num_data; // Make each pubkey different
122	1.59k	}
123	3.32k	r_script << pubkey_bytes;
124	3.32k	}
125	720	r_script << fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(0, 22);
126	720	},
127	10.1k	[&] {
128		// Mutate the buffer
129	536	const auto vec{ConsumeRandomLengthByteVector(fuzzed_data_provider, /max_length=/MAX_BUFFER_SZ)};
130	536	std::copy(vec.begin(), vec.end(), buffer.begin());
131	536	},
132	10.1k	[&] {
133		// Push an integral
134	350	r_script << fuzzed_data_provider.ConsumeIntegral<int64_t>();
135	350	},
136	10.1k	[&] {
137		// Push an opcode
138	1.07k	r_script << ConsumeOpcodeType(fuzzed_data_provider);
139	1.07k	},
140	10.1k	[&] {
141		// Push a scriptnum
142	424	r_script << ConsumeScriptNum(fuzzed_data_provider);
143	424	});
144	10.1k	}
145	6.05k	}
146	6.05k	if (maybe_p2wsh && fuzzed_data_provider.ConsumeBool()) { Branch (146:9): [True: 1.94k, False: 4.11k] Branch (146:24): [True: 167, False: 1.77k]
147	167	uint256 script_hash;
148	167	CSHA256().Write(r_script.data(), r_script.size()).Finalize(script_hash.begin());
149	167	r_script.clear();
150	167	r_script << OP_0 << ToByteVector(script_hash);
151	167	}
152	6.05k	return r_script;
153	6.05k	}
154
155		uint32_t ConsumeSequence(FuzzedDataProvider& fuzzed_data_provider) noexcept
156	2.04k	{
157	2.04k	return fuzzed_data_provider.ConsumeBool() ? Branch (157:12): [True: 471, False: 1.57k]
158	471	fuzzed_data_provider.PickValueInArray({
159	471	CTxIn::SEQUENCE_FINAL,
160	471	CTxIn::MAX_SEQUENCE_NONFINAL,
161	471	MAX_BIP125_RBF_SEQUENCE,
162	471	}) :
163	2.04k	fuzzed_data_provider.ConsumeIntegral<uint32_t>();
164	2.04k	}
165
166		std::map<COutPoint, Coin> ConsumeCoins(FuzzedDataProvider& fuzzed_data_provider) noexcept
167	0	{
168	0	std::map<COutPoint, Coin> coins;
169	0	LIMITED_WHILE(fuzzed_data_provider.ConsumeBool(), 10000) {
170	0	const std::optional<COutPoint> outpoint{ConsumeDeserializable<COutPoint>(fuzzed_data_provider)};
171	0	if (!outpoint) { Branch (171:13): [True: 0, False: 0]
172	0	break;
173	0	}
174	0	const std::optional<Coin> coin{ConsumeDeserializable<Coin>(fuzzed_data_provider)};
175	0	if (!coin) { Branch (175:13): [True: 0, False: 0]
176	0	break;
177	0	}
178	0	coins[outpoint] = coin;
179	0	}
180
181	0	return coins;
182	0	}
183
184		CTxDestination ConsumeTxDestination(FuzzedDataProvider& fuzzed_data_provider) noexcept
185	0	{
186	0	CTxDestination tx_destination;
187	0	const size_t call_size{CallOneOf(
188	0	fuzzed_data_provider,
189	0	[&] {
190	0	tx_destination = CNoDestination{};
191	0	},
192	0	[&] {
193	0	bool compressed = fuzzed_data_provider.ConsumeBool();
194	0	CPubKey pk{ConstructPubKeyBytes(
195	0	fuzzed_data_provider,
196	0	ConsumeFixedLengthByteVector(fuzzed_data_provider, (compressed ? CPubKey::COMPRESSED_SIZE : CPubKey::SIZE)), Branch (196:73): [True: 0, False: 0]
197	0	compressed
198	0	)};
199	0	tx_destination = PubKeyDestination{pk};
200	0	},
201	0	[&] {
202	0	tx_destination = PKHash{ConsumeUInt160(fuzzed_data_provider)};
203	0	},
204	0	[&] {
205	0	tx_destination = ScriptHash{ConsumeUInt160(fuzzed_data_provider)};
206	0	},
207	0	[&] {
208	0	tx_destination = WitnessV0ScriptHash{ConsumeUInt256(fuzzed_data_provider)};
209	0	},
210	0	[&] {
211	0	tx_destination = WitnessV0KeyHash{ConsumeUInt160(fuzzed_data_provider)};
212	0	},
213	0	[&] {
214	0	tx_destination = WitnessV1Taproot{XOnlyPubKey{ConsumeUInt256(fuzzed_data_provider)}};
215	0	},
216	0	[&] {
217	0	tx_destination = PayToAnchor{};
218	0	},
219	0	[&] {
220	0	std::vector<unsigned char> program{ConsumeRandomLengthByteVector(fuzzed_data_provider, /max_length=/40)};
221	0	if (program.size() < 2) { Branch (221:17): [True: 0, False: 0]
222	0	program = {0, 0};
223	0	}
224	0	tx_destination = WitnessUnknown{fuzzed_data_provider.ConsumeIntegralInRange<unsigned int>(2, 16), program};
225	0	})};
226	0	Assert(call_size == std::variant_size_v<CTxDestination>);
227	0	return tx_destination;
228	0	}
229
230		CKey ConsumePrivateKey(FuzzedDataProvider& fuzzed_data_provider, std::optional<bool> compressed) noexcept
231	0	{
232	0	auto key_data = fuzzed_data_provider.ConsumeBytes<uint8_t>(32);
233	0	key_data.resize(32);
234	0	CKey key;
235	0	bool compressed_value = compressed ? *compressed : fuzzed_data_provider.ConsumeBool(); Branch (235:29): [True: 0, False: 0]
236	0	key.Set(key_data.begin(), key_data.end(), compressed_value);
237	0	return key;
238	0	}
239
240		UniValue ConsumeUniValue(FuzzedDataProvider& fuzzed_data_provider) noexcept
241	2.16k	{
242	2.16k	UniValue value{UniValue::VOBJ};
243	2.16k	value.pushKV("bool", fuzzed_data_provider.ConsumeBool());
244	2.16k	value.pushKV("number", fuzzed_data_provider.ConsumeIntegralInRange<int>(-1'000'000, 1'000'000));
245	2.16k	value.pushKV("string", "ipc fuzz");
246
247	2.16k	return value;
248	2.16k	}
249
250		bool ContainsSpentInput(const CTransaction& tx, const CCoinsViewCache& inputs) noexcept
251	0	{
252	0	for (const CTxIn& tx_in : tx.vin) { Branch (252:29): [True: 0, False: 0]
253	0	const Coin& coin = inputs.AccessCoin(tx_in.prevout);
254	0	if (coin.IsSpent()) { Branch (254:13): [True: 0, False: 0]
255	0	return true;
256	0	}
257	0	}
258	0	return false;
259	0	}
260
261		FILE* FuzzedFileProvider::open()
262	0	{
263	0	SetFuzzedErrNo(m_fuzzed_data_provider);
264	0	if (m_fuzzed_data_provider.ConsumeBool()) { Branch (264:9): [True: 0, False: 0]
265	0	return nullptr;
266	0	}
267	0	std::string mode;
268	0	CallOneOf(
269	0	m_fuzzed_data_provider,
270	0	[&] {
271	0	mode = "r";
272	0	},
273	0	[&] {
274	0	mode = "r+";
275	0	},
276	0	[&] {
277	0	mode = "w";
278	0	},
279	0	[&] {
280	0	mode = "w+";
281	0	},
282	0	[&] {
283	0	mode = "a";
284	0	},
285	0	[&] {
286	0	mode = "a+";
287	0	});
288	0	#if defined _GNU_SOURCE && (defined(__linux__) \|\| defined(__FreeBSD__))
289	0	const cookie_io_functions_t io_hooks = {
290	0	FuzzedFileProvider::read,
291	0	FuzzedFileProvider::write,
292	0	FuzzedFileProvider::seek,
293	0	FuzzedFileProvider::close,
294	0	};
295	0	return fopencookie(this, mode.c_str(), io_hooks);
296		#else
297		(void)mode;
298		return nullptr;
299		#endif
300	0	}
301
302		ssize_t FuzzedFileProvider::read(void* cookie, char* buf, size_t size)
303	0	{
304	0	FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
305	0	SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
306	0	if (buf == nullptr \|\| size == 0 \|\| fuzzed_file->m_fuzzed_data_provider.ConsumeBool()) { Branch (306:9): [True: 0, False: 0] Branch (306:27): [True: 0, False: 0] Branch (306:40): [True: 0, False: 0]
307	0	return fuzzed_file->m_fuzzed_data_provider.ConsumeBool() ? 0 : -1; Branch (307:16): [True: 0, False: 0]
308	0	}
309	0	const std::vector<uint8_t> random_bytes = fuzzed_file->m_fuzzed_data_provider.ConsumeBytes<uint8_t>(size);
310	0	if (random_bytes.empty()) { Branch (310:9): [True: 0, False: 0]
311	0	return 0;
312	0	}
313	0	std::memcpy(buf, random_bytes.data(), random_bytes.size());
314	0	if (AdditionOverflow(fuzzed_file->m_offset, (int64_t)random_bytes.size())) { Branch (314:9): [True: 0, False: 0]
315	0	return fuzzed_file->m_fuzzed_data_provider.ConsumeBool() ? 0 : -1; Branch (315:16): [True: 0, False: 0]
316	0	}
317	0	fuzzed_file->m_offset += random_bytes.size();
318	0	return random_bytes.size();
319	0	}
320
321		ssize_t FuzzedFileProvider::write(void* cookie, const char* buf, size_t size)
322	0	{
323	0	FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
324	0	SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
325	0	const ssize_t n = fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<ssize_t>(0, size);
326	0	if (AdditionOverflow(fuzzed_file->m_offset, (int64_t)n)) { Branch (326:9): [True: 0, False: 0]
327	0	return 0;
328	0	}
329	0	fuzzed_file->m_offset += n;
330	0	return n;
331	0	}
332
333		int FuzzedFileProvider::seek(void* cookie, int64_t* offset, int whence)
334	0	{
335	0	assert(whence == SEEK_SET \|\| whence == SEEK_CUR \|\| whence == SEEK_END); Branch (335:5): [True: 0, False: 0] Branch (335:5): [True: 0, False: 0] Branch (335:5): [True: 0, False: 0] Branch (335:5): [True: 0, False: 0]
336	0	FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
337	0	SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
338	0	int64_t new_offset = 0;
339	0	if (whence == SEEK_SET) { Branch (339:9): [True: 0, False: 0]
340	0	new_offset = *offset;
341	0	} else if (whence == SEEK_CUR) { Branch (341:16): [True: 0, False: 0]
342	0	if (AdditionOverflow(fuzzed_file->m_offset, *offset)) { Branch (342:13): [True: 0, False: 0]
343	0	return -1;
344	0	}
345	0	new_offset = fuzzed_file->m_offset + *offset;
346	0	} else if (whence == SEEK_END) { Branch (346:16): [True: 0, False: 0]
347	0	const int64_t n = fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int64_t>(0, 4096);
348	0	if (AdditionOverflow(n, *offset)) { Branch (348:13): [True: 0, False: 0]
349	0	return -1;
350	0	}
351	0	new_offset = n + *offset;
352	0	}
353	0	if (new_offset < 0) { Branch (353:9): [True: 0, False: 0]
354	0	return -1;
355	0	}
356	0	fuzzed_file->m_offset = new_offset;
357	0	*offset = new_offset;
358	0	return fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int>(-1, 0);
359	0	}
360
361		int FuzzedFileProvider::close(void* cookie)
362	0	{
363	0	FuzzedFileProvider* fuzzed_file = (FuzzedFileProvider*)cookie;
364	0	SetFuzzedErrNo(fuzzed_file->m_fuzzed_data_provider);
365	0	return fuzzed_file->m_fuzzed_data_provider.ConsumeIntegralInRange<int>(-1, 0);
366	0	}