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Stable release v32.1bitcoin/bitcoin · f0de87f04062 ↗3,020 source files · 47.5 MB stored on the server440 file guides

Release published 2026-10-28 · Snapshot fetched 2026-11-01. Latest stable release at fetch time; development branches and Git history are excluded. Only the selected code window and visible folders load here.

bitcoin / bitcoinstable

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▤ arith_uint256.hGuide

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bitcoin / src / pubkey.h

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12,699 bytes · SHA-256 530f3bbe4ef5dc35… · View upstream ↗

251     *  will always fail. */
252    bool IsFullyValid() const;
253
254    /** Test whether this is the 0 key (the result of default construction). This implies
255     *  !IsFullyValid(). */
256    bool IsNull() const { return m_keydata.IsNull(); }
257
258    /** Construct an x-only pubkey from exactly 32 bytes. */
259    constexpr explicit XOnlyPubKey(std::span<const unsigned char> bytes) : m_keydata{bytes} {}
260
261    /** Construct an x-only pubkey from a normal pubkey. */
262    explicit XOnlyPubKey(const CPubKey& pubkey) : XOnlyPubKey(std::span{pubkey}.subspan(1, 32)) {}
263
264    /** Verify a Schnorr signature against this public key.
265     *
266     * sigbytes must be exactly 64 bytes.
267     */
268    bool VerifySchnorr(const uint256& msg, std::span<const unsigned char> sigbytes) const;
269
270    /** Compute the Taproot tweak as specified in BIP341, with *this as internal
271     * key:
272     *  - if merkle_root == nullptr: H_TapTweak(xonly_pubkey)
273     *  - otherwise:                 H_TapTweak(xonly_pubkey || *merkle_root)
274     *
275     * Note that the behavior of this function with merkle_root != nullptr is
276     * consensus critical.
277     */
278    uint256 ComputeTapTweakHash(const uint256* merkle_root) const;
279
280    /** Verify that this is a Taproot tweaked output point, against a specified internal key,
281     *  Merkle root, and parity. */
282    bool CheckTapTweak(const XOnlyPubKey& internal, const uint256& merkle_root, bool parity) const;
283
284    /** Construct a Taproot tweaked output point with this point as internal key. */
285    std::optional<std::pair<XOnlyPubKey, bool>> CreateTapTweak(const uint256* merkle_root) const;
286
287    /** Returns a list of CKeyIDs for the CPubKeys that could have been used to create this XOnlyPubKey.
288     * As the CKeyID is the Hash160(full pubkey), the produced CKeyIDs are for the versions of this
289     * XOnlyPubKey with 0x02 and 0x03 prefixes.
290     * This is needed for key lookups since keys are indexed by CKeyID.
291     */
292    std::vector<CKeyID> GetKeyIDs() const;
293    /** Returns this XOnlyPubKey with 0x02 and 0x03 prefixes */
294    std::vector<CPubKey> GetCPubKeys() const;
295
296    CPubKey GetEvenCorrespondingCPubKey() const;
297
298    const unsigned char& operator[](int pos) const { return *(m_keydata.begin() + pos); }
299    static constexpr size_t size() { return decltype(m_keydata)::size(); }
300    const unsigned char* data() const { return m_keydata.begin(); }
301    const unsigned char* begin() const { return m_keydata.begin(); }
302    const unsigned char* end() const { return m_keydata.end(); }
303    unsigned char* data() { return m_keydata.begin(); }
304    unsigned char* begin() { return m_keydata.begin(); }
305    unsigned char* end() { return m_keydata.end(); }
306    bool operator==(const XOnlyPubKey& other) const { return m_keydata == other.m_keydata; }
307    bool operator<(const XOnlyPubKey& other) const { return m_keydata < other.m_keydata; }
308
309    //! Implement serialization without length prefixes since it is a fixed length
310    SERIALIZE_METHODS(XOnlyPubKey, obj) { READWRITE(obj.m_keydata); }
311};
312
313/** An ElligatorSwift-encoded public key. */
314struct EllSwiftPubKey
315{
316private:
317    static constexpr size_t SIZE = 64;
318    std::array<std::byte, SIZE> m_pubkey;
319
320public:
321    /** Default constructor creates all-zero pubkey (which is valid). */
322    EllSwiftPubKey() noexcept = default;
323
324    /** Construct a new ellswift public key from a given serialization. */
325    EllSwiftPubKey(std::span<const std::byte> ellswift) noexcept;
326
327    /** Decode to normal compressed CPubKey (for debugging purposes). */
328    CPubKey Decode() const;
329
330    // Read-only access for serialization.
331    const std::byte* data() const { return m_pubkey.data(); }
332    static constexpr size_t size() { return SIZE; }
333    auto begin() const { return m_pubkey.cbegin(); }
334    auto end() const { return m_pubkey.cend(); }
335
336    bool friend operator==(const EllSwiftPubKey& a, const EllSwiftPubKey& b)
337    {
338        return a.m_pubkey == b.m_pubkey;
339    }
340};
341
342struct CExtPubKey {
343    unsigned char version[4];
344    unsigned char nDepth;
345    KeyFingerprint fingerprint;
346    unsigned int nChild;
347    ChainCode chaincode;
348    CPubKey pubkey;
349
350    friend bool operator==(const CExtPubKey &a, const CExtPubKey &b)
351    {
352        return a.nDepth == b.nDepth &&
353            a.fingerprint == b.fingerprint &&
354            a.nChild == b.nChild &&
355            a.chaincode == b.chaincode &&
356            a.pubkey == b.pubkey;
357    }
358
359    friend bool operator<(const CExtPubKey &a, const CExtPubKey &b)
360    {
361        if (a.pubkey < b.pubkey) {
362            return true;
363        } else if (a.pubkey > b.pubkey) {
364            return false;
365        }
366        return a.chaincode < b.chaincode;
367    }
368
369    KeyFingerprint id_key_fingerprint() const
370    {
371        return pubkey.GetID().fingerprint();
372    }
373
374    void Encode(unsigned char code[BIP32_EXTKEY_SIZE]) const;
375    void Decode(const unsigned char code[BIP32_EXTKEY_SIZE]);
376    void EncodeWithVersion(unsigned char code[BIP32_EXTKEY_WITH_VERSION_SIZE]) const;
377    void DecodeWithVersion(const unsigned char code[BIP32_EXTKEY_WITH_VERSION_SIZE]);
378    [[nodiscard]] bool Derive(CExtPubKey& out, unsigned int nChild, uint256* bip32_tweak_out = nullptr) const;
379};
380
381#endif // BITCOIN_PUBKEY_H
382

A READING COMPANION

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This file is included in the stable source snapshot. A file-specific guide has not been published yet.

440 guided files · 2,580 pending. Guides cover key sections, not every line.

cmake/bitcoin-build-config.h.in src/consensus/amount.h src/consensus/consensus.h src/primitives/block.h src/primitives/transaction.h src/crypto/sha256.h src/util/moneystr.h src/clientversion.h src/uint256.h src/script/script.h src/policy/policy.h CMakeLists.txt README.md COPYING src/consensus/tx_check.cpp src/consensus/tx_verify.cpp src/consensus/merkle.cpp src/pow.cpp src/validation.cpp src/script/interpreter.cpp src/script/solver.cpp src/script/sign.cpp src/key_io.cpp src/net.cpp src/net_processing.cpp src/netaddress.cpp src/protocol.h src/wallet/wallet.cpp src/wallet/spend.cpp

← Previous 250 linesCode page 2

src/wallet/receive.cpp

src/wallet/coinselection.cpp

src/consensus/validation.h

src/primitives/transaction.cpp

src/script/descriptor.cpp

src/bitcoin-cli.cpp

src/rpc/blockchain.cpp

src/rpc/rawtransaction.cpp

src/init.cpp

src/crypto/sha256.cpp

src/consensus/merkle.h

src/consensus/tx_check.h

src/consensus/tx_verify.h

src/policy/feerate.h

src/policy/feerate.cpp

src/primitives/transaction_identifier.h

src/chainparamsbase.h

src/chainparamsbase.cpp

src/util/moneystr.cpp

src/crypto/ripemd160.h

src/crypto/sha1.h

src/crypto/sha512.h

src/crypto/hmac_sha256.h

src/crypto/hmac_sha512.h

src/crypto/hmac_sha256.cpp

src/crypto/hmac_sha512.cpp

src/crypto/hkdf_sha256_32.h

src/crypto/hkdf_sha256_32.cpp

src/support/cleanse.h

src/support/cleanse.cpp

src/crypto/siphash.cpp

src/crypto/muhash.h

src/crypto/chacha20.h

src/crypto/poly1305.h

src/crypto/chacha20poly1305.h

src/crypto/chacha20poly1305.cpp

src/util/chaintype.cpp

src/util/obfuscation.h

src/util/byte_units.h

src/util/overflow.h

src/blockencodings.cpp

src/net_permissions.cpp

src/policy/packages.cpp

src/policy/rbf.cpp

src/policy/truc_policy.cpp

src/policy/ephemeral_policy.cpp

src/policy/settings.cpp

src/policy/policy.cpp

src/node/transaction.cpp

src/node/coin.cpp

src/rpc/client.cpp

src/rpc/external_signer.cpp

src/rpc/request.cpp

src/rpc/server_util.cpp

src/rpc/fees.cpp

src/rpc/output_script.cpp

src/rpc/rawtransaction_util.cpp

src/rpc/rawtransaction_util.h

src/rpc/register.h

src/rpc/request.h

src/rpc/server_util.h

src/rpc/protocol.h

src/rpc/server.h

src/rpc/signmessage.cpp

src/rpc/txoutproof.cpp

src/rpc/util.cpp

src/rpc/util.h

src/wallet/rpc/addresses.cpp

src/wallet/rpc/backup.cpp

src/wallet/rpc/coins.cpp

src/wallet/rpc/encrypt.cpp

src/wallet/rpc/signmessage.cpp

src/wallet/rpc/util.cpp

src/wallet/rpc/util.h

src/wallet/coincontrol.cpp

src/wallet/coincontrol.h

src/wallet/context.cpp

src/wallet/context.h

src/wallet/crypter.cpp

src/wallet/crypter.h

src/wallet/db.cpp

src/wallet/export.cpp

src/wallet/external_signer_scriptpubkeyman.cpp

src/wallet/rpc/spend.cpp

src/wallet/rpc/transactions.cpp

src/wallet/rpc/wallet.cpp

src/wallet/feebumper.cpp

src/wallet/feebumper.h

src/index/base.h

src/index/base.cpp

src/index/txindex.h

src/index/txindex.cpp

src/index/txindex_key.h

src/index/txospenderindex.h

src/index/txospenderindex.cpp

src/index/blockfilterindex.h

src/index/blockfilterindex.cpp

src/index/coinstatsindex.h

src/index/coinstatsindex.cpp

src/index/db_key.h

src/index/disktxpos.h

src/kernel/chain.cpp

src/kernel/chain.h

src/kernel/checks.cpp

src/kernel/checks.h

src/kernel/context.cpp

src/kernel/context.h

src/kernel/cs_main.cpp

src/kernel/cs_main.h

src/kernel/disconnected_transactions.cpp

src/kernel/disconnected_transactions.h

src/kernel/mempool_removal_reason.cpp

src/kernel/mempool_removal_reason.h

src/kernel/coinstats.cpp

src/kernel/coinstats.h

src/kernel/chainparams.cpp

src/kernel/chainparams.h

src/wallet/sqlite.cpp

src/wallet/sqlite.h

src/wallet/transaction.cpp

src/wallet/transaction.h

src/wallet/dump.cpp

src/wallet/dump.h

src/wallet/init.cpp

src/wallet/walletutil.cpp

src/wallet/walletutil.h

src/wallet/wallettool.cpp

src/wallet/wallettool.h

src/wallet/export.h

src/wallet/migrate.cpp

src/wallet/migrate.h

src/wallet/db.h

src/wallet/walletdb.cpp

src/wallet/interfaces.cpp

src/wallet/scriptpubkeyman.cpp

src/wallet/scriptpubkeyman.h

src/kernel/bitcoinkernel.cpp

src/kernel/bitcoinkernel.h

src/kernel/bitcoinkernel_wrapper.h

src/node/chainstate.cpp

src/node/chainstate.h

src/node/blockstorage.cpp

src/node/blockstorage.h

src/node/mempool_persist.cpp

src/node/mempool_persist.h

src/node/utxo_snapshot.cpp

src/node/utxo_snapshot.h

src/node/kernel_notifications.cpp

src/node/kernel_notifications.h

src/node/blockmanager_args.cpp

src/kernel/blockmanager_opts.h

src/util/expected.cpp

src/policy/settings.h

src/util/types.h

src/kernel/messagestartchars.h

src/kernel/warning.h

src/util/exception.h

src/common/license_info.h

src/node/coins_view_args.h

src/node/database_args.h

src/util/batchpriority.h

src/util/ui_change_type.h

src/node/coins_view_args.cpp

src/node/peerman_args.h

src/util/serfloat.h

src/node/blockmanager_args.h

src/node/database_args.cpp

src/util/overloaded.h

src/interfaces/types.h

src/node/chainstatemanager_args.h

src/node/minisketchwrapper.h

src/util/macros.h

src/util/syserror.h

src/common/run_command.h

src/util/bytevectorhash.cpp

src/node/mempool_persist_args.cpp

src/util/exec.h

src/util/rbf.h

src/crypto/hex_base.h

src/node/mempool_persist_args.h

src/interfaces/echo.h

src/util/any.h

src/util/batchpriority.cpp

src/util/threadnames.h

src/node/coin.h

src/node/mempool_args.h

src/util/asmap.h

src/util/bytevectorhash.h

src/node/context.cpp

src/util/insert.h

src/util/readwritefile.h

src/node/peerman_args.cpp

src/node/interface_ui.cpp

src/interfaces/handler.h

src/node/mining_args.h

src/util/hasher.cpp

src/common/init.h

src/kernel/mempool_limits.h

src/common/system.h

src/crypto/sha3.h

src/util/threadinterrupt.cpp

src/node/protocol_version.h

src/util/exception.cpp

src/common/messages.h

src/node/connection_types.cpp

src/util/bip32.h

src/common/license_info.cpp

src/util/stdmutex.h

src/common/run_command.cpp

src/util/check.cpp

src/util/golombrice.h

src/node/types.h

src/node/timeoffsets.h

src/util/readwritefile.cpp

src/util/fastrange.h

src/util/signalinterrupt.h

src/util/task_runner.h

src/util/syserror.cpp

src/common/interfaces.cpp

src/common/types.h

src/util/threadinterrupt.h

src/kernel/chainstatemanager_opts.h

src/node/psbt.h

src/policy/ephemeral_policy.h

src/util/trace.h

src/common/url.cpp

src/kernel/mempool_options.h

src/util/serfloat.cpp

src/kernel/notifications_interface.h

src/node/timeoffsets.cpp

src/node/warnings.cpp

src/util/hash_type.h

src/crypto/hex_base.cpp

src/node/eviction.h

src/util/tokenbucket.h

src/crypto/aes.h

src/common/pcp.h

src/util/feefrac.cpp

src/node/transaction.h

src/util/threadnames.cpp

src/common/signmessage.h

src/util/exec.cpp

src/util/signalinterrupt.cpp

src/clientversion.cpp

src/common/signmessage.cpp

src/compat/assumptions.h

src/compat/byteswap.h

src/deploymentinfo.cpp

src/deploymentinfo.h

src/deploymentstatus.cpp

src/deploymentstatus.h

src/dummywallet.cpp

src/external_signer.h

src/init/bitcoin-gui.cpp

src/init/bitcoin-node.cpp

src/init/bitcoin-qt.cpp

src/init/bitcoin-wallet.cpp

src/init/bitcoind.cpp

src/init/common.h

src/interfaces/init.h

src/interfaces/ipc.h

src/key_io.h

src/logging/categories.h

src/logging/timer.h

src/mapport.h

src/musig.h

src/net_permissions.h

src/netgroup.h

src/netmessagemaker.h

src/node/chainstatemanager_args.cpp

src/node/connection_types.h

src/node/context.h

src/node/interface_ui.h

src/node/mempool_args.cpp

src/node/mining_args.cpp

src/node/minisketchwrapper.cpp

src/node/txreconciliation.h

src/policy/fees/estimator_args.cpp

src/policy/fees/estimator_args.h

src/policy/fees/estimator_man.cpp

src/policy/fees/estimator_man.h

src/policy/packages.h

src/policy/rbf.h

src/policy/truc_policy.h

src/pow.h

src/primitives/block.cpp

src/randomenv.h

src/rest.h

src/script/keyorigin.h

src/script/parsing.cpp

src/script/parsing.h

src/script/script_error.h

src/script/sigcache.cpp

src/script/sigcache.h

src/script/solver.h

src/script/verify_flags.h

src/semaphore_grant.h

src/signet.h

src/span.h

src/support/allocators/secure.h

src/support/allocators/zeroafterfree.h

src/util/tokenpipe.cpp

src/util/translation.h

src/util/vector.h

src/versionbits.h

src/versionbits_impl.h

src/wallet/external_signer_scriptpubkeyman.h

src/wallet/fees.h

src/wallet/load.h

src/wallet/receive.h

src/wallet/rpc/wallet.h

src/wallet/types.h

src/walletinitinterface.h

src/zmq/zmqabstractnotifier.cpp

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