15428987191

Committed 03 Jun 2025 10:17PM UTC coverage: 81.096% (+0.006%) from 81.09%

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Merge pull request #1699 from evoskuil/master

Update header.version processing, style, refactor.

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79.04

/src/chain/header.cpp

/**
 * Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
 *
 * This file is part of libbitcoin.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
#include <bitcoin/system/chain/header.hpp>

#include <chrono>
#include <utility>
#include <bitcoin/system/chain/chain_state.hpp>
#include <bitcoin/system/chain/compact.hpp>
#include <bitcoin/system/data/data.hpp>
#include <bitcoin/system/define.hpp>
#include <bitcoin/system/hash/hash.hpp>
#include <bitcoin/system/error/error.hpp>
#include <bitcoin/system/stream/stream.hpp>

namespace libbitcoin {
namespace system {
namespace chain {

// Use system clock because we require accurate time of day.
using wall_clock = std::chrono::system_clock;

// Constructors.
// ----------------------------------------------------------------------------

header::header() NOEXCEPT
  : header(0, {}, {}, 0, 0, 0, false)
{
}

header::header(uint32_t version, hash_digest&& previous_block_hash,
    hash_digest&& merkle_root, uint32_t timestamp, uint32_t bits,
    uint32_t nonce) NOEXCEPT
  : header(version, std::move(previous_block_hash), std::move(merkle_root),
      timestamp, bits, nonce, true)
{
}

header::header(uint32_t version, const hash_digest& previous_block_hash,
    const hash_digest& merkle_root, uint32_t timestamp, uint32_t bits,
    uint32_t nonce) NOEXCEPT
  : header(version, previous_block_hash, merkle_root, timestamp, bits, nonce,
      true)
{
}

header::header(stream::in::fast&& stream) NOEXCEPT
  : header(read::bytes::fast(stream))
{
}

header::header(stream::in::fast& stream) NOEXCEPT
  : header(read::bytes::fast(stream))
{
}

header::header(std::istream&& stream) NOEXCEPT
  : header(read::bytes::istream(stream))
{
}

header::header(std::istream& stream) NOEXCEPT
  : header(read::bytes::istream(stream))
{
}

header::header(reader&& source) NOEXCEPT
  : header(source)
{
}

header::header(reader& source) NOEXCEPT
{
    assign_data(source);
}

// protected
header::header(uint32_t version, hash_digest&& previous_block_hash,
    hash_digest&& merkle_root, uint32_t timestamp, uint32_t bits,
    uint32_t nonce, bool valid) NOEXCEPT
  : version_(version),
    previous_block_hash_(std::move(previous_block_hash)),
    merkle_root_(std::move(merkle_root)),
    timestamp_(timestamp),
    bits_(bits),
    nonce_(nonce),
    valid_(valid)
{
}

// protected
header::header(uint32_t version, const hash_digest& previous_block_hash,
    const hash_digest& merkle_root, uint32_t timestamp, uint32_t bits,
    uint32_t nonce, bool valid) NOEXCEPT
  : version_(version),
    previous_block_hash_(previous_block_hash),
    merkle_root_(merkle_root),
    timestamp_(timestamp),
    bits_(bits),
    nonce_(nonce),
    valid_(valid)
{
}

// Operators.
// ----------------------------------------------------------------------------

bool header::operator==(const header& other) const NOEXCEPT
{
    return (version_ == other.version_)
        && (previous_block_hash_ == other.previous_block_hash_)
        && (merkle_root_ == other.merkle_root_)
        && (timestamp_ == other.timestamp_)
        && (bits_ == other.bits_)
        && (nonce_ == other.nonce_);
}

bool header::operator!=(const header& other) const NOEXCEPT
{
    return !(*this == other);
}

// Deserialization.
// ----------------------------------------------------------------------------

// private
void header::assign_data(reader& source) NOEXCEPT
{
    // Hashes are copied directly into to header-allocated space.
    // Integrals are stack-allocated and copied to header-allocated space.
    version_ = source.read_4_bytes_little_endian();
    source.read_bytes(previous_block_hash_.data(), hash_size);
    source.read_bytes(merkle_root_.data(), hash_size);
    timestamp_ = source.read_4_bytes_little_endian();
    bits_ = source.read_4_bytes_little_endian();
    nonce_ = source.read_4_bytes_little_endian();
    valid_ = source;
}

// Serialization.
// ----------------------------------------------------------------------------

data_chunk header::to_data() const NOEXCEPT
{
    data_chunk data(serialized_size());
    stream::out::fast ostream(data);
    write::bytes::fast out(ostream);
    to_data(out);
    return data;
}

void header::to_data(std::ostream& stream) const NOEXCEPT
{
    write::bytes::ostream out(stream);
    to_data(out);
}

void header::to_data(writer& sink) const NOEXCEPT
{
    sink.write_4_bytes_little_endian(version_);
    sink.write_bytes(previous_block_hash_);
    sink.write_bytes(merkle_root_);
    sink.write_4_bytes_little_endian(timestamp_);
    sink.write_4_bytes_little_endian(bits_);
    sink.write_4_bytes_little_endian(nonce_);
}

// Properties.
// ----------------------------------------------------------------------------

bool header::is_valid() const NOEXCEPT
{
    return valid_;
}

uint32_t header::version() const NOEXCEPT
{
    return version_;
}

const hash_digest& header::previous_block_hash() const NOEXCEPT
{
    return previous_block_hash_;
}

const hash_digest& header::merkle_root() const NOEXCEPT
{
    return merkle_root_;
}

uint32_t header::timestamp() const NOEXCEPT
{
    return timestamp_;
}

uint32_t header::bits() const NOEXCEPT
{
    return bits_;
}

uint32_t header::nonce() const NOEXCEPT
{
    return nonce_;
}

void header::set_hash(const hash_digest& hash) const NOEXCEPT
{
    hash_ = hash;
}

// computed
hash_digest header::hash() const NOEXCEPT
{
    if (hash_)
        return *hash_;

    BC_PUSH_WARNING(LOCAL_VARIABLE_NOT_INITIALIZED)
    hash_digest digest;
    BC_POP_WARNING()

    stream::out::fast stream{ digest };
    hash::sha256x2::fast sink{ stream };
    to_data(sink);
    sink.flush();
    return digest;
}

const hash_digest& header::get_hash() const NOEXCEPT
{
    if (!hash_)
        set_hash(hash());

    return *hash_;
}

// static
uint256_t header::proof(uint32_t bits) NOEXCEPT
{
    auto target = compact::expand(bits);

    //*************************************************************************
    // CONSENSUS: bits may be overflowed, which is guarded here.
    // A target of zero is disallowed so is useful as a sentinel value.
    //*************************************************************************
    if (is_zero(target))
        return target;

    //*************************************************************************
    // CONSENSUS: If target is (2^256)-1, division would fail, however compact
    // compression is lossy, and therefore unable to produce negative one.
    //*************************************************************************

    // We need to compute 2**256 / (target + 1), but we can't represent 2**256
    // as it's too large for uint256. However as 2**256 is at least as large as
    // target + 1, it is equal to ((2**256 - target - 1) / (target + 1)) + 1, or
    // (~target / (target + 1)) + 1.
    return ++(~target / (target + one));
}

// computed
uint256_t header::proof() const NOEXCEPT
{
    // Returns zero if bits_ mantissa is less than one or bits_ is overflowed.
    return proof(bits_);
}

// Check.
// ----------------------------------------------------------------------------

bool header::is_invalid_proof_of_work(uint32_t proof_of_work_limit,
    bool scrypt) const NOEXCEPT
{
    static const auto limit = compact::expand(proof_of_work_limit);
    const auto target = compact::expand(bits_);

    //*************************************************************************
    // CONSENSUS: bits_ may be overflowed, which is guarded here.
    // A target of zero is disallowed so is useful as a sentinel value.
    //*************************************************************************
    if (is_zero(target))
        return true;

    // Ensure claimed work is at or above minimum (less is more).
    if (target > limit)
        return true;

    // Conditionally use scrypt proof of work (e.g. Litecoin).
    return to_uintx(scrypt ? scrypt_hash(to_data()) : hash()) > target;
}

// ****************************************************************************
// CONSENSUS: 32 bit unsigned unix time overflows in 2106.
// ****************************************************************************
bool header::is_futuristic_timestamp(
    uint32_t timestamp_limit_seconds) const NOEXCEPT
{
    using namespace std::chrono;
    static const auto two_hours = seconds(timestamp_limit_seconds);
    const auto time = wall_clock::from_time_t(timestamp_);
    const auto future = wall_clock::now() + two_hours;
    return time > future;
}

// Validation.
// ----------------------------------------------------------------------------

code header::check(uint32_t timestamp_limit_seconds,
    uint32_t proof_of_work_limit, bool scrypt) const NOEXCEPT
{
    if (is_invalid_proof_of_work(proof_of_work_limit, scrypt))
        return error::invalid_proof_of_work;
    if (is_futuristic_timestamp(timestamp_limit_seconds))
        return error::futuristic_timestamp;

    return error::block_success;
}

// minimum_block_version
// median_time_past
// work_required

// Checkpoints and previous_block_hash are chain validation (not here).
// bits_ below is the consensus direct comparison of the header.bits value.
// All other work comparisons performed on expanded/normalized bits values.
code header::accept(const context& ctx) const NOEXCEPT
{
    if (ctx.is_insufficient_version(version_))
        return error::insufficient_block_version;
    if (ctx.is_anachronistic_timestamp(timestamp_))
        return error::anachronistic_timestamp;
    if (ctx.is_invalid_work(bits_))
        return error::incorrect_proof_of_work;

    return error::block_success;
}

// JSON value convertors.
// ----------------------------------------------------------------------------

namespace json = boost::json;

// boost/json will soon have NOEXCEPT: github.com/boostorg/json/pull/636
BC_PUSH_WARNING(NO_THROW_IN_NOEXCEPT)

header tag_invoke(json::value_to_tag<header>,
    const json::value& value) NOEXCEPT
{
    hash_digest previous, merkle_root;
    if (!decode_hash(previous, value.at("previous").get_string().c_str()) ||
        !decode_hash(merkle_root, value.at("merkle_root").get_string().c_str()))
        return {};

    return
    {
        value.at("version").to_number<uint32_t>(),
        previous,
        merkle_root,
        value.at("timestamp").to_number<uint32_t>(),
        value.at("bits").to_number<uint32_t>(),
        value.at("nonce").to_number<uint32_t>()
    };
}

void tag_invoke(json::value_from_tag, json::value& value,
    const header& tx) NOEXCEPT
{
    value =
    {
        { "version", tx.version() },
        { "previous", encode_hash(tx.previous_block_hash()) },
        { "merkle_root", encode_hash(tx.merkle_root()) },
        { "timestamp", tx.timestamp() },
        { "bits", tx.bits() },
        { "nonce", tx.nonce() }
    };
}

BC_POP_WARNING()

header::cptr tag_invoke(json::value_to_tag<header::cptr>,
    const json::value& value) NOEXCEPT
{
    return to_shared(tag_invoke(json::value_to_tag<header>{}, value));
}

// Shared pointer overload is required for navigation.
BC_PUSH_WARNING(SMART_PTR_NOT_NEEDED)
BC_PUSH_WARNING(NO_VALUE_OR_CONST_REF_SHARED_PTR)

void tag_invoke(json::value_from_tag tag, json::value& value,
    const header::cptr& tx) NOEXCEPT
{
    tag_invoke(tag, value, *tx);
}

BC_POP_WARNING()
BC_POP_WARNING()

} // namespace chain
} // namespace system
} // namespace libbitcoin

1	/**
2	* Copyright (c) 2011-2025 libbitcoin developers (see AUTHORS)
3	*
4	* This file is part of libbitcoin.
5	*
6	* This program is free software: you can redistribute it and/or modify
7	* it under the terms of the GNU Affero General Public License as published by
8	* the Free Software Foundation, either version 3 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU Affero General Public License for more details.
15	*
16	* You should have received a copy of the GNU Affero General Public License
17	* along with this program. If not, see <http://www.gnu.org/licenses/>.
18	*/
19	#include <bitcoin/system/chain/header.hpp>
20
21	#include <chrono>
22	#include <utility>
23	#include <bitcoin/system/chain/chain_state.hpp>
24	#include <bitcoin/system/chain/compact.hpp>
25	#include <bitcoin/system/data/data.hpp>
26	#include <bitcoin/system/define.hpp>
27	#include <bitcoin/system/hash/hash.hpp>
28	#include <bitcoin/system/error/error.hpp>
29	#include <bitcoin/system/stream/stream.hpp>
30
31	namespace libbitcoin {
32	namespace system {
33	namespace chain {
34
35	// Use system clock because we require accurate time of day.
36	using wall_clock = std::chrono::system_clock;
37
38	// Constructors.
39	// ----------------------------------------------------------------------------
40
41	header::header() NOEXCEPT	99✔
42	: header(0, {}, {}, 0, 0, 0, false)	99✔
43	{
44	}	99✔
45
46	header::header(uint32_t version, hash_digest&& previous_block_hash,	8✔
47	hash_digest&& merkle_root, uint32_t timestamp, uint32_t bits,
48	uint32_t nonce) NOEXCEPT
49	: header(version, std::move(previous_block_hash), std::move(merkle_root),
50	timestamp, bits, nonce, true)
51	{
52	}	8✔
53
54	header::header(uint32_t version, const hash_digest& previous_block_hash,	10✔
55	const hash_digest& merkle_root, uint32_t timestamp, uint32_t bits,
56	uint32_t nonce) NOEXCEPT
57	: header(version, previous_block_hash, merkle_root, timestamp, bits, nonce,
58	true)
59	{
60	}	8✔
61
62	header::header(stream::in::fast&& stream) NOEXCEPT	1✔
63	: header(read::bytes::fast(stream))	1✔
64	{
65	}	1✔
66
67	header::header(stream::in::fast& stream) NOEXCEPT	1✔
68	: header(read::bytes::fast(stream))	1✔
69	{
70	}	1✔
71
72	header::header(std::istream&& stream) NOEXCEPT	×
73	: header(read::bytes::istream(stream))	×
74	{
75	}	×
76
77	header::header(std::istream& stream) NOEXCEPT	3✔
78	: header(read::bytes::istream(stream))	3✔
79	{
80	}	3✔
81
82	header::header(reader&& source) NOEXCEPT	5✔
83	: header(source)	5✔
84	{
85	}	×
86
87	header::header(reader& source) NOEXCEPT	113✔
88	{
89	assign_data(source);	113✔
90	}	113✔
91
92	// protected
93	header::header(uint32_t version, hash_digest&& previous_block_hash,	107✔
94	hash_digest&& merkle_root, uint32_t timestamp, uint32_t bits,
95	uint32_t nonce, bool valid) NOEXCEPT	107✔
96	: version_(version),	107✔
97	previous_block_hash_(std::move(previous_block_hash)),	107✔
98	merkle_root_(std::move(merkle_root)),	107✔
99	timestamp_(timestamp),	107✔
100	bits_(bits),	107✔
101	nonce_(nonce),	107✔
102	valid_(valid)	107✔
103	{
104	}	×
105
106	// protected
107	header::header(uint32_t version, const hash_digest& previous_block_hash,	10✔
108	const hash_digest& merkle_root, uint32_t timestamp, uint32_t bits,
109	uint32_t nonce, bool valid) NOEXCEPT	8✔
110	: version_(version),	10✔
111	previous_block_hash_(previous_block_hash),	10✔
112	merkle_root_(merkle_root),	10✔
113	timestamp_(timestamp),	10✔
114	bits_(bits),	10✔
115	nonce_(nonce),	10✔
116	valid_(valid)	2✔
117	{
118	}	×
119
120	// Operators.
121	// ----------------------------------------------------------------------------
122
123	bool header::operator==(const header& other) const NOEXCEPT	38✔
124	{
125	return (version_ == other.version_)	38✔
126	&& (previous_block_hash_ == other.previous_block_hash_)	31✔
127	&& (merkle_root_ == other.merkle_root_)	31✔
128	&& (timestamp_ == other.timestamp_)	31✔
129	&& (bits_ == other.bits_)
130	&& (nonce_ == other.nonce_);	69✔
131	}
132
133	bool header::operator!=(const header& other) const NOEXCEPT	2✔
134	{
135	return !(*this == other);	2✔
136	}
137
138	// Deserialization.
139	// ----------------------------------------------------------------------------
140
141	// private
142	void header::assign_data(reader& source) NOEXCEPT	113✔
143	{
144	// Hashes are copied directly into to header-allocated space.
145	// Integrals are stack-allocated and copied to header-allocated space.
146	version_ = source.read_4_bytes_little_endian();	113✔
147	source.read_bytes(previous_block_hash_.data(), hash_size);	113✔
148	source.read_bytes(merkle_root_.data(), hash_size);	113✔
149	timestamp_ = source.read_4_bytes_little_endian();	113✔
150	bits_ = source.read_4_bytes_little_endian();	113✔
151	nonce_ = source.read_4_bytes_little_endian();	113✔
152	valid_ = source;	113✔
153	}	113✔
154
155	// Serialization.
156	// ----------------------------------------------------------------------------
157
158	data_chunk header::to_data() const NOEXCEPT	9✔
159	{
160	data_chunk data(serialized_size());	9✔
161	stream::out::fast ostream(data);	9✔
162	write::bytes::fast out(ostream);	9✔
163	to_data(out);	9✔
164	return data;	18✔
165	}	9✔
166
167	void header::to_data(std::ostream& stream) const NOEXCEPT	1✔
168	{
169	write::bytes::ostream out(stream);	1✔
170	to_data(out);	1✔
171	}	1✔
172
173	void header::to_data(writer& sink) const NOEXCEPT	86✔
174	{
175	sink.write_4_bytes_little_endian(version_);	86✔
176	sink.write_bytes(previous_block_hash_);	86✔
177	sink.write_bytes(merkle_root_);	86✔
178	sink.write_4_bytes_little_endian(timestamp_);	86✔
179	sink.write_4_bytes_little_endian(bits_);	86✔
180	sink.write_4_bytes_little_endian(nonce_);	86✔
181	}	86✔
182
183	// Properties.
184	// ----------------------------------------------------------------------------
185
186	bool header::is_valid() const NOEXCEPT	11✔
187	{
188	return valid_;	11✔
189	}
190
191	uint32_t header::version() const NOEXCEPT	6✔
192	{
193	return version_;	4✔
194	}
195
196	const hash_digest& header::previous_block_hash() const NOEXCEPT	6✔
197	{
198	return previous_block_hash_;	6✔
199	}
200
201	const hash_digest& header::merkle_root() const NOEXCEPT	20✔
202	{
203	return merkle_root_;	20✔
204	}
205
206	uint32_t header::timestamp() const NOEXCEPT	6✔
207	{
208	return timestamp_;	4✔
209	}
210
211	uint32_t header::bits() const NOEXCEPT	6✔
212	{
213	return bits_;	4✔
214	}
215
216	uint32_t header::nonce() const NOEXCEPT	6✔
217	{
218	return nonce_;	4✔
219	}
220
221	void header::set_hash(const hash_digest& hash) const NOEXCEPT	×
222	{
223	hash_ = hash;	×
224	}	×
225
226	// computed
227	hash_digest header::hash() const NOEXCEPT	42✔
228	{
229	if (hash_)	42✔
230	return *hash_;	×
231
232	BC_PUSH_WARNING(LOCAL_VARIABLE_NOT_INITIALIZED)
233	hash_digest digest;	42✔
234	BC_POP_WARNING()
235
236	stream::out::fast stream{ digest };	42✔
237	hash::sha256x2::fast sink{ stream };	42✔
238	to_data(sink);	42✔
239	sink.flush();	42✔
240	return digest;	42✔
241	}	42✔
242
243	const hash_digest& header::get_hash() const NOEXCEPT	×
244	{
245	if (!hash_)	×
246	set_hash(hash());	×
247
248	return *hash_;	×
249	}
250
251	// static
252	uint256_t header::proof(uint32_t bits) NOEXCEPT	1✔
253	{
254	auto target = compact::expand(bits);	1✔
255
256	//*************************************************************************
257	// CONSENSUS: bits may be overflowed, which is guarded here.
258	// A target of zero is disallowed so is useful as a sentinel value.
259	//*************************************************************************
260	if (is_zero(target))	1✔
261	return target;	×
262
263	//*************************************************************************
264	// CONSENSUS: If target is (2^256)-1, division would fail, however compact
265	// compression is lossy, and therefore unable to produce negative one.
266	//*************************************************************************
267
268	// We need to compute 2256 / (target + 1), but we can't represent 2256
269	// as it's too large for uint256. However as 2**256 is at least as large as
270	// target + 1, it is equal to ((2**256 - target - 1) / (target + 1)) + 1, or
271	// (~target / (target + 1)) + 1.
272	return ++(~target / (target + one));	2✔
273	}
274
275	// computed
276	uint256_t header::proof() const NOEXCEPT	1✔
277	{
278	// Returns zero if bits_ mantissa is less than one or bits_ is overflowed.
279	return proof(bits_);	1✔
280	}
281
282	// Check.
283	// ----------------------------------------------------------------------------
284
285	bool header::is_invalid_proof_of_work(uint32_t proof_of_work_limit,	5✔
286	bool scrypt) const NOEXCEPT
287	{
288	static const auto limit = compact::expand(proof_of_work_limit);	5✔
289	const auto target = compact::expand(bits_);	5✔
290
291	//*************************************************************************
292	// CONSENSUS: bits_ may be overflowed, which is guarded here.
293	// A target of zero is disallowed so is useful as a sentinel value.
294	//*************************************************************************
295	if (is_zero(target))	5✔
296	return true;
297
298	// Ensure claimed work is at or above minimum (less is more).
299	if (target > limit)	4✔
300	return true;
301
302	// Conditionally use scrypt proof of work (e.g. Litecoin).
303	return to_uintx(scrypt ? scrypt_hash(to_data()) : hash()) > target;	10✔
304	}
305
306	// ****************************************************************************
307	// CONSENSUS: 32 bit unsigned unix time overflows in 2106.
308	// ****************************************************************************
309	bool header::is_futuristic_timestamp(	2✔
310	uint32_t timestamp_limit_seconds) const NOEXCEPT
311	{
312	using namespace std::chrono;	2✔
313	static const auto two_hours = seconds(timestamp_limit_seconds);	2✔
314	const auto time = wall_clock::from_time_t(timestamp_);	2✔
315	const auto future = wall_clock::now() + two_hours;	2✔
316	return time > future;	2✔
317	}
318
319	// Validation.
320	// ----------------------------------------------------------------------------
321
322	code header::check(uint32_t timestamp_limit_seconds,	×
323	uint32_t proof_of_work_limit, bool scrypt) const NOEXCEPT
324	{
325	if (is_invalid_proof_of_work(proof_of_work_limit, scrypt))	×
326	return error::invalid_proof_of_work;	×
NEW 327	if (is_futuristic_timestamp(timestamp_limit_seconds))	×
328	return error::futuristic_timestamp;	×
329
330	return error::block_success;	×
331	}
332
333	// minimum_block_version
334	// median_time_past
335	// work_required
336
337	// Checkpoints and previous_block_hash are chain validation (not here).
338	// bits_ below is the consensus direct comparison of the header.bits value.
339	// All other work comparisons performed on expanded/normalized bits values.
340	code header::accept(const context& ctx) const NOEXCEPT	×
341	{
NEW 342	if (ctx.is_insufficient_version(version_))	×
NEW 343	return error::insufficient_block_version;	×
NEW 344	if (ctx.is_anachronistic_timestamp(timestamp_))	×
NEW 345	return error::anachronistic_timestamp;	×
NEW 346	if (ctx.is_invalid_work(bits_))	×
UNCOV 347	return error::incorrect_proof_of_work;	×
348
349	return error::block_success;	×
350	}
351
352	// JSON value convertors.
353	// ----------------------------------------------------------------------------
354
355	namespace json = boost::json;
356
357	// boost/json will soon have NOEXCEPT: github.com/boostorg/json/pull/636
358	BC_PUSH_WARNING(NO_THROW_IN_NOEXCEPT)
359
360	header tag_invoke(json::value_to_tag<header>,	2✔
361	const json::value& value) NOEXCEPT
362	{
363	hash_digest previous, merkle_root;	2✔
364	if (!decode_hash(previous, value.at("previous").get_string().c_str()) \|\|	4✔
365	!decode_hash(merkle_root, value.at("merkle_root").get_string().c_str()))	2✔
366	return {};	×
367
368	return	2✔
369	{
370	value.at("version").to_number<uint32_t>(),	2✔
371	previous,
372	merkle_root,
373	value.at("timestamp").to_number<uint32_t>(),	2✔
374	value.at("bits").to_number<uint32_t>(),	2✔
375	value.at("nonce").to_number<uint32_t>()	4✔
376	};	8✔
377	}
378
379	void tag_invoke(json::value_from_tag, json::value& value,	4✔
380	const header& tx) NOEXCEPT
381	{
382	value =	16✔
383	{
384	{ "version", tx.version() },
385	{ "previous", encode_hash(tx.previous_block_hash()) },	4✔
386	{ "merkle_root", encode_hash(tx.merkle_root()) },	8✔
387	{ "timestamp", tx.timestamp() },
388	{ "bits", tx.bits() },
389	{ "nonce", tx.nonce() }
390	};	4✔
391	}	4✔
392
393	BC_POP_WARNING()
394
395	header::cptr tag_invoke(json::value_to_tag<header::cptr>,	×
396	const json::value& value) NOEXCEPT
397	{
398	return to_shared(tag_invoke(json::value_to_tag<header>{}, value));	×
399	}
400
401	// Shared pointer overload is required for navigation.
402	BC_PUSH_WARNING(SMART_PTR_NOT_NEEDED)
403	BC_PUSH_WARNING(NO_VALUE_OR_CONST_REF_SHARED_PTR)
404
405	void tag_invoke(json::value_from_tag tag, json::value& value,	×
406	const header::cptr& tx) NOEXCEPT
407	{
408	tag_invoke(tag, value, *tx);	×
409	}	×
410
411	BC_POP_WARNING()
412	BC_POP_WARNING()
413
414	} // namespace chain
415	} // namespace system
416	} // namespace libbitcoin

libbitcoin / libbitcoin-system / 15428987191

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