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1 : : // Copyright (c) 2009-2010 Satoshi Nakamoto
2 : : // Copyright (c) 2009-2022 The Bitcoin Core developers
3 : : // Distributed under the MIT software license, see the accompanying
4 : : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 : :
6 : : #ifndef BITCOIN_PROTOCOL_H
7 : : #define BITCOIN_PROTOCOL_H
8 : :
9 : : #include <kernel/messagestartchars.h> // IWYU pragma: export
10 : : #include <netaddress.h>
11 : : #include <primitives/transaction.h>
12 : : #include <serialize.h>
13 : : #include <streams.h>
14 : : #include <uint256.h>
15 : : #include <util/time.h>
16 : :
17 : : #include <array>
18 : : #include <cstdint>
19 : : #include <limits>
20 : : #include <string>
21 : :
22 : : /** Message header.
23 : : * (4) message start.
24 : : * (12) command.
25 : : * (4) size.
26 : : * (4) checksum.
27 : : */
28 : : class CMessageHeader
29 : : {
30 : : public:
31 : : static constexpr size_t COMMAND_SIZE = 12;
32 : : static constexpr size_t MESSAGE_SIZE_SIZE = 4;
33 : : static constexpr size_t CHECKSUM_SIZE = 4;
34 : : static constexpr size_t MESSAGE_SIZE_OFFSET = std::tuple_size_v<MessageStartChars> + COMMAND_SIZE;
35 : : static constexpr size_t CHECKSUM_OFFSET = MESSAGE_SIZE_OFFSET + MESSAGE_SIZE_SIZE;
36 : : static constexpr size_t HEADER_SIZE = std::tuple_size_v<MessageStartChars> + COMMAND_SIZE + MESSAGE_SIZE_SIZE + CHECKSUM_SIZE;
37 : :
38 : 0 : explicit CMessageHeader() = default;
39 : :
40 : : /** Construct a P2P message header from message-start characters, a command and the size of the message.
41 : : * @note Passing in a `pszCommand` longer than COMMAND_SIZE will result in a run-time assertion error.
42 : : */
43 : : CMessageHeader(const MessageStartChars& pchMessageStartIn, const char* pszCommand, unsigned int nMessageSizeIn);
44 : :
45 : : std::string GetCommand() const;
46 : : bool IsCommandValid() const;
47 : :
48 : 0 : SERIALIZE_METHODS(CMessageHeader, obj) { READWRITE(obj.pchMessageStart, obj.pchCommand, obj.nMessageSize, obj.pchChecksum); }
49 : :
50 : 0 : MessageStartChars pchMessageStart{};
51 : 0 : char pchCommand[COMMAND_SIZE]{};
52 : 0 : uint32_t nMessageSize{std::numeric_limits<uint32_t>::max()};
53 : 0 : uint8_t pchChecksum[CHECKSUM_SIZE]{};
54 : : };
55 : :
56 : : /**
57 : : * Bitcoin protocol message types. When adding new message types, don't forget
58 : : * to update allNetMessageTypes in protocol.cpp.
59 : : */
60 : : namespace NetMsgType {
61 : :
62 : : /**
63 : : * The version message provides information about the transmitting node to the
64 : : * receiving node at the beginning of a connection.
65 : : */
66 : : extern const char* VERSION;
67 : : /**
68 : : * The verack message acknowledges a previously-received version message,
69 : : * informing the connecting node that it can begin to send other messages.
70 : : */
71 : : extern const char* VERACK;
72 : : /**
73 : : * The addr (IP address) message relays connection information for peers on the
74 : : * network.
75 : : */
76 : : extern const char* ADDR;
77 : : /**
78 : : * The addrv2 message relays connection information for peers on the network just
79 : : * like the addr message, but is extended to allow gossiping of longer node
80 : : * addresses (see BIP155).
81 : : */
82 : : extern const char *ADDRV2;
83 : : /**
84 : : * The sendaddrv2 message signals support for receiving ADDRV2 messages (BIP155).
85 : : * It also implies that its sender can encode as ADDRV2 and would send ADDRV2
86 : : * instead of ADDR to a peer that has signaled ADDRV2 support by sending SENDADDRV2.
87 : : */
88 : : extern const char *SENDADDRV2;
89 : : /**
90 : : * The inv message (inventory message) transmits one or more inventories of
91 : : * objects known to the transmitting peer.
92 : : */
93 : : extern const char* INV;
94 : : /**
95 : : * The getdata message requests one or more data objects from another node.
96 : : */
97 : : extern const char* GETDATA;
98 : : /**
99 : : * The merkleblock message is a reply to a getdata message which requested a
100 : : * block using the inventory type MSG_MERKLEBLOCK.
101 : : * @since protocol version 70001 as described by BIP37.
102 : : */
103 : : extern const char* MERKLEBLOCK;
104 : : /**
105 : : * The getblocks message requests an inv message that provides block header
106 : : * hashes starting from a particular point in the block chain.
107 : : */
108 : : extern const char* GETBLOCKS;
109 : : /**
110 : : * The getheaders message requests a headers message that provides block
111 : : * headers starting from a particular point in the block chain.
112 : : * @since protocol version 31800.
113 : : */
114 : : extern const char* GETHEADERS;
115 : : /**
116 : : * The tx message transmits a single transaction.
117 : : */
118 : : extern const char* TX;
119 : : /**
120 : : * The headers message sends one or more block headers to a node which
121 : : * previously requested certain headers with a getheaders message.
122 : : * @since protocol version 31800.
123 : : */
124 : : extern const char* HEADERS;
125 : : /**
126 : : * The block message transmits a single serialized block.
127 : : */
128 : : extern const char* BLOCK;
129 : : /**
130 : : * The getaddr message requests an addr message from the receiving node,
131 : : * preferably one with lots of IP addresses of other receiving nodes.
132 : : */
133 : : extern const char* GETADDR;
134 : : /**
135 : : * The mempool message requests the TXIDs of transactions that the receiving
136 : : * node has verified as valid but which have not yet appeared in a block.
137 : : * @since protocol version 60002 as described by BIP35.
138 : : * Only available with service bit NODE_BLOOM, see also BIP111.
139 : : */
140 : : extern const char* MEMPOOL;
141 : : /**
142 : : * The ping message is sent periodically to help confirm that the receiving
143 : : * peer is still connected.
144 : : */
145 : : extern const char* PING;
146 : : /**
147 : : * The pong message replies to a ping message, proving to the pinging node that
148 : : * the ponging node is still alive.
149 : : * @since protocol version 60001 as described by BIP31.
150 : : */
151 : : extern const char* PONG;
152 : : /**
153 : : * The notfound message is a reply to a getdata message which requested an
154 : : * object the receiving node does not have available for relay.
155 : : * @since protocol version 70001.
156 : : */
157 : : extern const char* NOTFOUND;
158 : : /**
159 : : * The filterload message tells the receiving peer to filter all relayed
160 : : * transactions and requested merkle blocks through the provided filter.
161 : : * @since protocol version 70001 as described by BIP37.
162 : : * Only available with service bit NODE_BLOOM since protocol version
163 : : * 70011 as described by BIP111.
164 : : */
165 : : extern const char* FILTERLOAD;
166 : : /**
167 : : * The filteradd message tells the receiving peer to add a single element to a
168 : : * previously-set bloom filter, such as a new public key.
169 : : * @since protocol version 70001 as described by BIP37.
170 : : * Only available with service bit NODE_BLOOM since protocol version
171 : : * 70011 as described by BIP111.
172 : : */
173 : : extern const char* FILTERADD;
174 : : /**
175 : : * The filterclear message tells the receiving peer to remove a previously-set
176 : : * bloom filter.
177 : : * @since protocol version 70001 as described by BIP37.
178 : : * Only available with service bit NODE_BLOOM since protocol version
179 : : * 70011 as described by BIP111.
180 : : */
181 : : extern const char* FILTERCLEAR;
182 : : /**
183 : : * Indicates that a node prefers to receive new block announcements via a
184 : : * "headers" message rather than an "inv".
185 : : * @since protocol version 70012 as described by BIP130.
186 : : */
187 : : extern const char* SENDHEADERS;
188 : : /**
189 : : * The feefilter message tells the receiving peer not to inv us any txs
190 : : * which do not meet the specified min fee rate.
191 : : * @since protocol version 70013 as described by BIP133
192 : : */
193 : : extern const char* FEEFILTER;
194 : : /**
195 : : * Contains a 1-byte bool and 8-byte LE version number.
196 : : * Indicates that a node is willing to provide blocks via "cmpctblock" messages.
197 : : * May indicate that a node prefers to receive new block announcements via a
198 : : * "cmpctblock" message rather than an "inv", depending on message contents.
199 : : * @since protocol version 70014 as described by BIP 152
200 : : */
201 : : extern const char* SENDCMPCT;
202 : : /**
203 : : * Contains a CBlockHeaderAndShortTxIDs object - providing a header and
204 : : * list of "short txids".
205 : : * @since protocol version 70014 as described by BIP 152
206 : : */
207 : : extern const char* CMPCTBLOCK;
208 : : /**
209 : : * Contains a BlockTransactionsRequest
210 : : * Peer should respond with "blocktxn" message.
211 : : * @since protocol version 70014 as described by BIP 152
212 : : */
213 : : extern const char* GETBLOCKTXN;
214 : : /**
215 : : * Contains a BlockTransactions.
216 : : * Sent in response to a "getblocktxn" message.
217 : : * @since protocol version 70014 as described by BIP 152
218 : : */
219 : : extern const char* BLOCKTXN;
220 : : /**
221 : : * getcfilters requests compact filters for a range of blocks.
222 : : * Only available with service bit NODE_COMPACT_FILTERS as described by
223 : : * BIP 157 & 158.
224 : : */
225 : : extern const char* GETCFILTERS;
226 : : /**
227 : : * cfilter is a response to a getcfilters request containing a single compact
228 : : * filter.
229 : : */
230 : : extern const char* CFILTER;
231 : : /**
232 : : * getcfheaders requests a compact filter header and the filter hashes for a
233 : : * range of blocks, which can then be used to reconstruct the filter headers
234 : : * for those blocks.
235 : : * Only available with service bit NODE_COMPACT_FILTERS as described by
236 : : * BIP 157 & 158.
237 : : */
238 : : extern const char* GETCFHEADERS;
239 : : /**
240 : : * cfheaders is a response to a getcfheaders request containing a filter header
241 : : * and a vector of filter hashes for each subsequent block in the requested range.
242 : : */
243 : : extern const char* CFHEADERS;
244 : : /**
245 : : * getcfcheckpt requests evenly spaced compact filter headers, enabling
246 : : * parallelized download and validation of the headers between them.
247 : : * Only available with service bit NODE_COMPACT_FILTERS as described by
248 : : * BIP 157 & 158.
249 : : */
250 : : extern const char* GETCFCHECKPT;
251 : : /**
252 : : * cfcheckpt is a response to a getcfcheckpt request containing a vector of
253 : : * evenly spaced filter headers for blocks on the requested chain.
254 : : */
255 : : extern const char* CFCHECKPT;
256 : : /**
257 : : * Indicates that a node prefers to relay transactions via wtxid, rather than
258 : : * txid.
259 : : * @since protocol version 70016 as described by BIP 339.
260 : : */
261 : : extern const char* WTXIDRELAY;
262 : : /**
263 : : * Contains a 4-byte version number and an 8-byte salt.
264 : : * The salt is used to compute short txids needed for efficient
265 : : * txreconciliation, as described by BIP 330.
266 : : */
267 : : extern const char* SENDTXRCNCL;
268 : : }; // namespace NetMsgType
269 : :
270 : : /* Get a vector of all valid message types (see above) */
271 : : const std::vector<std::string>& getAllNetMessageTypes();
272 : :
273 : : /** nServices flags */
274 : : enum ServiceFlags : uint64_t {
275 : : // NOTE: When adding here, be sure to update serviceFlagToStr too
276 : : // Nothing
277 : : NODE_NONE = 0,
278 : : // NODE_NETWORK means that the node is capable of serving the complete block chain. It is currently
279 : : // set by all Bitcoin Core non pruned nodes, and is unset by SPV clients or other light clients.
280 : : NODE_NETWORK = (1 << 0),
281 : : // NODE_BLOOM means the node is capable and willing to handle bloom-filtered connections.
282 : : NODE_BLOOM = (1 << 2),
283 : : // NODE_WITNESS indicates that a node can be asked for blocks and transactions including
284 : : // witness data.
285 : : NODE_WITNESS = (1 << 3),
286 : : // NODE_COMPACT_FILTERS means the node will service basic block filter requests.
287 : : // See BIP157 and BIP158 for details on how this is implemented.
288 : : NODE_COMPACT_FILTERS = (1 << 6),
289 : : // NODE_NETWORK_LIMITED means the same as NODE_NETWORK with the limitation of only
290 : : // serving the last 288 (2 day) blocks
291 : : // See BIP159 for details on how this is implemented.
292 : : NODE_NETWORK_LIMITED = (1 << 10),
293 : :
294 : : // NODE_P2P_V2 means the node supports BIP324 transport
295 : : NODE_P2P_V2 = (1 << 11),
296 : :
297 : : // Bits 24-31 are reserved for temporary experiments. Just pick a bit that
298 : : // isn't getting used, or one not being used much, and notify the
299 : : // bitcoin-development mailing list. Remember that service bits are just
300 : : // unauthenticated advertisements, so your code must be robust against
301 : : // collisions and other cases where nodes may be advertising a service they
302 : : // do not actually support. Other service bits should be allocated via the
303 : : // BIP process.
304 : : };
305 : :
306 : : /**
307 : : * Convert service flags (a bitmask of NODE_*) to human readable strings.
308 : : * It supports unknown service flags which will be returned as "UNKNOWN[...]".
309 : : * @param[in] flags multiple NODE_* bitwise-OR-ed together
310 : : */
311 : : std::vector<std::string> serviceFlagsToStr(uint64_t flags);
312 : :
313 : : /**
314 : : * Gets the set of service flags which are "desirable" for a given peer.
315 : : *
316 : : * These are the flags which are required for a peer to support for them
317 : : * to be "interesting" to us, ie for us to wish to use one of our few
318 : : * outbound connection slots for or for us to wish to prioritize keeping
319 : : * their connection around.
320 : : *
321 : : * Relevant service flags may be peer- and state-specific in that the
322 : : * version of the peer may determine which flags are required (eg in the
323 : : * case of NODE_NETWORK_LIMITED where we seek out NODE_NETWORK peers
324 : : * unless they set NODE_NETWORK_LIMITED and we are out of IBD, in which
325 : : * case NODE_NETWORK_LIMITED suffices).
326 : : *
327 : : * Thus, generally, avoid calling with peerServices == NODE_NONE, unless
328 : : * state-specific flags must absolutely be avoided. When called with
329 : : * peerServices == NODE_NONE, the returned desirable service flags are
330 : : * guaranteed to not change dependent on state - ie they are suitable for
331 : : * use when describing peers which we know to be desirable, but for which
332 : : * we do not have a confirmed set of service flags.
333 : : *
334 : : * If the NODE_NONE return value is changed, contrib/seeds/makeseeds.py
335 : : * should be updated appropriately to filter for the same nodes.
336 : : */
337 : : ServiceFlags GetDesirableServiceFlags(ServiceFlags services);
338 : :
339 : : /** Set the current IBD status in order to figure out the desirable service flags */
340 : : void SetServiceFlagsIBDCache(bool status);
341 : :
342 : : /**
343 : : * A shortcut for (services & GetDesirableServiceFlags(services))
344 : : * == GetDesirableServiceFlags(services), ie determines whether the given
345 : : * set of service flags are sufficient for a peer to be "relevant".
346 : : */
347 : 0 : static inline bool HasAllDesirableServiceFlags(ServiceFlags services)
348 : : {
349 : 0 : return !(GetDesirableServiceFlags(services) & (~services));
350 : : }
351 : :
352 : : /**
353 : : * Checks if a peer with the given service flags may be capable of having a
354 : : * robust address-storage DB.
355 : : */
356 : 0 : static inline bool MayHaveUsefulAddressDB(ServiceFlags services)
357 : : {
358 [ # # ]: 0 : return (services & NODE_NETWORK) || (services & NODE_NETWORK_LIMITED);
359 : : }
360 : :
361 : : /** A CService with information about it as peer */
362 : 0 : class CAddress : public CService
363 : : {
364 : : static constexpr std::chrono::seconds TIME_INIT{100000000};
365 : :
366 : : /** Historically, CAddress disk serialization stored the CLIENT_VERSION, optionally OR'ed with
367 : : * the ADDRV2_FORMAT flag to indicate V2 serialization. The first field has since been
368 : : * disentangled from client versioning, and now instead:
369 : : * - The low bits (masked by DISK_VERSION_IGNORE_MASK) store the fixed value DISK_VERSION_INIT,
370 : : * (in case any code exists that treats it as a client version) but are ignored on
371 : : * deserialization.
372 : : * - The high bits (masked by ~DISK_VERSION_IGNORE_MASK) store actual serialization information.
373 : : * Only 0 or DISK_VERSION_ADDRV2 (equal to the historical ADDRV2_FORMAT) are valid now, and
374 : : * any other value triggers a deserialization failure. Other values can be added later if
375 : : * needed.
376 : : *
377 : : * For disk deserialization, ADDRV2_FORMAT in the stream version signals that ADDRV2
378 : : * deserialization is permitted, but the actual format is determined by the high bits in the
379 : : * stored version field. For network serialization, the stream version having ADDRV2_FORMAT or
380 : : * not determines the actual format used (as it has no embedded version number).
381 : : */
382 : : static constexpr uint32_t DISK_VERSION_INIT{220000};
383 : : static constexpr uint32_t DISK_VERSION_IGNORE_MASK{0b00000000'00000111'11111111'11111111};
384 : : /** The version number written in disk serialized addresses to indicate V2 serializations.
385 : : * It must be exactly 1<<29, as that is the value that historical versions used for this
386 : : * (they used their internal ADDRV2_FORMAT flag here). */
387 : : static constexpr uint32_t DISK_VERSION_ADDRV2{1 << 29};
388 : : static_assert((DISK_VERSION_INIT & ~DISK_VERSION_IGNORE_MASK) == 0, "DISK_VERSION_INIT must be covered by DISK_VERSION_IGNORE_MASK");
389 : : static_assert((DISK_VERSION_ADDRV2 & DISK_VERSION_IGNORE_MASK) == 0, "DISK_VERSION_ADDRV2 must not be covered by DISK_VERSION_IGNORE_MASK");
390 : :
391 : : public:
392 : 0 : CAddress() : CService{} {};
393 : 0 : CAddress(CService ipIn, ServiceFlags nServicesIn) : CService{ipIn}, nServices{nServicesIn} {};
394 : 0 : CAddress(CService ipIn, ServiceFlags nServicesIn, NodeSeconds time) : CService{ipIn}, nTime{time}, nServices{nServicesIn} {};
395 : :
396 : : enum class Format {
397 : : Disk,
398 : : Network,
399 : : };
400 : : struct SerParams : CNetAddr::SerParams {
401 : : const Format fmt;
402 : 0 : SER_PARAMS_OPFUNC
403 : : };
404 : : static constexpr SerParams V1_NETWORK{{CNetAddr::Encoding::V1}, Format::Network};
405 : : static constexpr SerParams V2_NETWORK{{CNetAddr::Encoding::V2}, Format::Network};
406 : : static constexpr SerParams V1_DISK{{CNetAddr::Encoding::V1}, Format::Disk};
407 : : static constexpr SerParams V2_DISK{{CNetAddr::Encoding::V2}, Format::Disk};
408 : :
409 : 0 : SERIALIZE_METHODS_PARAMS(CAddress, obj, SerParams, params)
410 : : {
411 : : bool use_v2;
412 [ # # ][ # # ]: 0 : if (params.fmt == Format::Disk) {
[ # # ][ # # ]
[ # # ][ # # ]
413 : : // In the disk serialization format, the encoding (v1 or v2) is determined by a flag version
414 : : // that's part of the serialization itself. ADDRV2_FORMAT in the stream version only determines
415 : : // whether V2 is chosen/permitted at all.
416 : 0 : uint32_t stored_format_version = DISK_VERSION_INIT;
417 [ # # ][ # # ]: 0 : if (params.enc == Encoding::V2) stored_format_version |= DISK_VERSION_ADDRV2;
[ # # ][ # # ]
[ # # ][ # # ]
418 : 0 : READWRITE(stored_format_version);
419 : 0 : stored_format_version &= ~DISK_VERSION_IGNORE_MASK; // ignore low bits
420 [ # # ][ # # ]: 0 : if (stored_format_version == 0) {
[ # # ][ # # ]
[ # # ][ # # ]
421 : 0 : use_v2 = false;
422 [ # # ][ # # ]: 0 : } else if (stored_format_version == DISK_VERSION_ADDRV2 && params.enc == Encoding::V2) {
[ # # ][ # # ]
[ # # ][ # # ]
423 : : // Only support v2 deserialization if V2 is set.
424 : 0 : use_v2 = true;
425 : 0 : } else {
426 [ # # ][ # # ]: 0 : throw std::ios_base::failure("Unsupported CAddress disk format version");
[ # # ][ # # ]
[ # # ][ # # ]
427 : : }
428 : 0 : } else {
429 [ # # ][ # # ]: 0 : assert(params.fmt == Format::Network);
[ # # ][ # # ]
[ # # ][ # # ]
430 : : // In the network serialization format, the encoding (v1 or v2) is determined directly by
431 : : // the value of enc in the stream params, as no explicitly encoded version
432 : : // exists in the stream.
433 : 0 : use_v2 = params.enc == Encoding::V2;
434 : : }
435 : :
436 : 0 : READWRITE(Using<LossyChronoFormatter<uint32_t>>(obj.nTime));
437 : : // nServices is serialized as CompactSize in V2; as uint64_t in V1.
438 [ # # ][ # # ]: 0 : if (use_v2) {
[ # # ][ # # ]
[ # # ][ # # ]
439 : : uint64_t services_tmp;
440 : 0 : SER_WRITE(obj, services_tmp = obj.nServices);
441 : 0 : READWRITE(Using<CompactSizeFormatter<false>>(services_tmp));
442 : 0 : SER_READ(obj, obj.nServices = static_cast<ServiceFlags>(services_tmp));
443 : 0 : } else {
444 : 0 : READWRITE(Using<CustomUintFormatter<8>>(obj.nServices));
445 : : }
446 : : // Invoke V1/V2 serializer for CService parent object.
447 [ # # ][ # # ]: 0 : const auto ser_params{use_v2 ? CNetAddr::V2 : CNetAddr::V1};
[ # # ][ # # ]
[ # # ][ # # ]
448 : 0 : READWRITE(ser_params(AsBase<CService>(obj)));
449 : 0 : }
450 : :
451 : : //! Always included in serialization. The behavior is unspecified if the value is not representable as uint32_t.
452 [ # # ][ # # ]: 0 : NodeSeconds nTime{TIME_INIT};
453 : : //! Serialized as uint64_t in V1, and as CompactSize in V2.
454 : 0 : ServiceFlags nServices{NODE_NONE};
455 : :
456 : 0 : friend bool operator==(const CAddress& a, const CAddress& b)
457 : : {
458 [ # # ]: 0 : return a.nTime == b.nTime &&
459 [ # # ]: 0 : a.nServices == b.nServices &&
460 : 0 : static_cast<const CService&>(a) == static_cast<const CService&>(b);
461 : : }
462 : : };
463 : :
464 : : /** getdata message type flags */
465 : : const uint32_t MSG_WITNESS_FLAG = 1 << 30;
466 : : const uint32_t MSG_TYPE_MASK = 0xffffffff >> 2;
467 : :
468 : : /** getdata / inv message types.
469 : : * These numbers are defined by the protocol. When adding a new value, be sure
470 : : * to mention it in the respective BIP.
471 : : */
472 : : enum GetDataMsg : uint32_t {
473 : : UNDEFINED = 0,
474 : : MSG_TX = 1,
475 : : MSG_BLOCK = 2,
476 : : MSG_WTX = 5, //!< Defined in BIP 339
477 : : // The following can only occur in getdata. Invs always use TX/WTX or BLOCK.
478 : : MSG_FILTERED_BLOCK = 3, //!< Defined in BIP37
479 : : MSG_CMPCT_BLOCK = 4, //!< Defined in BIP152
480 : : MSG_WITNESS_BLOCK = MSG_BLOCK | MSG_WITNESS_FLAG, //!< Defined in BIP144
481 : : MSG_WITNESS_TX = MSG_TX | MSG_WITNESS_FLAG, //!< Defined in BIP144
482 : : // MSG_FILTERED_WITNESS_BLOCK is defined in BIP144 as reserved for future
483 : : // use and remains unused.
484 : : // MSG_FILTERED_WITNESS_BLOCK = MSG_FILTERED_BLOCK | MSG_WITNESS_FLAG,
485 : : };
486 : :
487 : : /** inv message data */
488 : : class CInv
489 : : {
490 : : public:
491 : : CInv();
492 : : CInv(uint32_t typeIn, const uint256& hashIn);
493 : :
494 : 0 : SERIALIZE_METHODS(CInv, obj) { READWRITE(obj.type, obj.hash); }
495 : :
496 : : friend bool operator<(const CInv& a, const CInv& b);
497 : :
498 : : std::string GetCommand() const;
499 : : std::string ToString() const;
500 : :
501 : : // Single-message helper methods
502 : 0 : bool IsMsgTx() const { return type == MSG_TX; }
503 : 0 : bool IsMsgBlk() const { return type == MSG_BLOCK; }
504 : 0 : bool IsMsgWtx() const { return type == MSG_WTX; }
505 : 0 : bool IsMsgFilteredBlk() const { return type == MSG_FILTERED_BLOCK; }
506 : 0 : bool IsMsgCmpctBlk() const { return type == MSG_CMPCT_BLOCK; }
507 : 0 : bool IsMsgWitnessBlk() const { return type == MSG_WITNESS_BLOCK; }
508 : :
509 : : // Combined-message helper methods
510 : 0 : bool IsGenTxMsg() const
511 : : {
512 [ # # ][ # # ]: 0 : return type == MSG_TX || type == MSG_WTX || type == MSG_WITNESS_TX;
513 : : }
514 : 0 : bool IsGenBlkMsg() const
515 : : {
516 [ # # ][ # # ]: 0 : return type == MSG_BLOCK || type == MSG_FILTERED_BLOCK || type == MSG_CMPCT_BLOCK || type == MSG_WITNESS_BLOCK;
[ # # ]
517 : : }
518 : :
519 : : uint32_t type;
520 : : uint256 hash;
521 : : };
522 : :
523 : : /** Convert a TX/WITNESS_TX/WTX CInv to a GenTxid. */
524 : : GenTxid ToGenTxid(const CInv& inv);
525 : :
526 : : #endif // BITCOIN_PROTOCOL_H
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