XOnlyPubKey Class Reference

#include <pubkey.h>

Inheritance diagram for XOnlyPubKey:

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Public Member Functions
	XOnlyPubKey ()=default
	Construct an empty x-only pubkey. More...
	XOnlyPubKey (const XOnlyPubKey &)=default
XOnlyPubKey &	operator= (const XOnlyPubKey &)=default
bool	IsFullyValid () const
	Determine if this pubkey is fully valid. More...
bool	IsNull () const
	Test whether this is the 0 key (the result of default construction). More...
	XOnlyPubKey (Span< const unsigned char > bytes)
	Construct an x-only pubkey from exactly 32 bytes. More...
	XOnlyPubKey (const CPubKey &pubkey)
	Construct an x-only pubkey from a normal pubkey. More...
bool	VerifySchnorr (const uint256 &msg, Span< const unsigned char > sigbytes) const
	Verify a Schnorr signature against this public key. More...
uint256	ComputeTapTweakHash (const uint256 *merkle_root) const
	Compute the Taproot tweak as specified in BIP341, with *this as internal key: More...
bool	CheckTapTweak (const XOnlyPubKey &internal, const uint256 &merkle_root, bool parity) const
	Verify that this is a Taproot tweaked output point, against a specified internal key, Merkle root, and parity. More...
std::optional< std::pair< XOnlyPubKey, bool > >	CreateTapTweak (const uint256 *merkle_root) const
	Construct a Taproot tweaked output point with this point as internal key. More...
std::vector< CKeyID >	GetKeyIDs () const
	Returns a list of CKeyIDs for the CPubKeys that could have been used to create this XOnlyPubKey. More...
const unsigned char &	operator[] (int pos) const
const unsigned char *	data () const
const unsigned char *	begin () const
const unsigned char *	end () const
unsigned char *	begin ()
unsigned char *	end ()
bool	operator== (const XOnlyPubKey &other) const
bool	operator!= (const XOnlyPubKey &other) const
bool	operator< (const XOnlyPubKey &other) const

Static Public Member Functions
static constexpr size_t	size ()

Private Attributes
uint256	m_keydata

Detailed Description

Definition at line 224 of file pubkey.h.

Constructor & Destructor Documentation

XOnlyPubKey() [1/4]

XOnlyPubKey::XOnlyPubKey ( )

default

Construct an empty x-only pubkey.

XOnlyPubKey() [2/4]

XOnlyPubKey::XOnlyPubKey ( const XOnlyPubKey &  )

default

XOnlyPubKey() [3/4]

XOnlyPubKey::XOnlyPubKey ( Span< const unsigned char >  bytes )

explicit

Construct an x-only pubkey from exactly 32 bytes.

Definition at line 177 of file pubkey.cpp.

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XOnlyPubKey() [4/4]

XOnlyPubKey::XOnlyPubKey ( const CPubKey &  pubkey )

inlineexplicit

Construct an x-only pubkey from a normal pubkey.

Definition at line 249 of file pubkey.h.

Member Function Documentation

begin() [1/2]

unsigned char* XOnlyPubKey::begin ( )

inline

Definition at line 284 of file pubkey.h.

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begin() [2/2]

const unsigned char* XOnlyPubKey::begin ( ) const

inline

Definition at line 282 of file pubkey.h.

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CheckTapTweak()

bool XOnlyPubKey::CheckTapTweak	(	const XOnlyPubKey &	internal,
		const uint256 &	merkle_root,
		bool	parity
	)		const

Verify that this is a Taproot tweaked output point, against a specified internal key, Merkle root, and parity.

Definition at line 227 of file pubkey.cpp.

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ComputeTapTweakHash()

uint256 XOnlyPubKey::ComputeTapTweakHash

(

const uint256 *

merkle_root

)

const

Compute the Taproot tweak as specified in BIP341, with *this as internal key:

• if merkle_root == nullptr: H_TapTweak(xonly_pubkey)
• otherwise: H_TapTweak(xonly_pubkey || *merkle_root)

Note that the behavior of this function with merkle_root != nullptr is consensus critical.

Definition at line 216 of file pubkey.cpp.

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CreateTapTweak()

std::optional< std::pair< XOnlyPubKey, bool > > XOnlyPubKey::CreateTapTweak

(

const uint256 *

merkle_root

)

const

Construct a Taproot tweaked output point with this point as internal key.

Definition at line 235 of file pubkey.cpp.

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data()

const unsigned char* XOnlyPubKey::data ( ) const

inline

Definition at line 280 of file pubkey.h.

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end() [1/2]

unsigned char* XOnlyPubKey::end ( )

inline

Definition at line 285 of file pubkey.h.

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end() [2/2]

const unsigned char* XOnlyPubKey::end ( ) const

inline

Definition at line 283 of file pubkey.h.

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GetKeyIDs()

std::vector< CKeyID > XOnlyPubKey::GetKeyIDs

(

)

const

Returns a list of CKeyIDs for the CPubKeys that could have been used to create this XOnlyPubKey.

This is needed for key lookups since keys are indexed by CKeyID.

Definition at line 183 of file pubkey.cpp.

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IsFullyValid()

bool XOnlyPubKey::IsFullyValid

(

)

const

Determine if this pubkey is fully valid.

This is true for approximately 50% of all possible 32-byte arrays. If false, VerifySchnorr, CheckTapTweak and CreateTapTweak will always fail.

Definition at line 200 of file pubkey.cpp.

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IsNull()

bool XOnlyPubKey::IsNull ( ) const

inline

Test whether this is the 0 key (the result of default construction).

This implies !IsFullyValid().

Definition at line 243 of file pubkey.h.

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operator!=()

bool XOnlyPubKey::operator!= ( const XOnlyPubKey &  other ) const

inline

Definition at line 287 of file pubkey.h.

operator<()

bool XOnlyPubKey::operator< ( const XOnlyPubKey &  other ) const

inline

Definition at line 288 of file pubkey.h.

operator=()

XOnlyPubKey& XOnlyPubKey::operator= ( const XOnlyPubKey &  )

default

operator==()

bool XOnlyPubKey::operator== ( const XOnlyPubKey &  other ) const

inline

Definition at line 286 of file pubkey.h.

operator[]()

const unsigned char& XOnlyPubKey::operator[] ( int  pos ) const

inline

Definition at line 279 of file pubkey.h.

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size()

static constexpr size_t XOnlyPubKey::size ( )

inlinestaticconstexpr

Definition at line 281 of file pubkey.h.

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VerifySchnorr()

bool XOnlyPubKey::VerifySchnorr	(	const uint256 &	msg,
		Span< const unsigned char >	sigbytes
	)		const

Verify a Schnorr signature against this public key.

sigbytes must be exactly 64 bytes.

Definition at line 206 of file pubkey.cpp.

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Member Data Documentation

m_keydata

uint256 XOnlyPubKey::m_keydata

private

Definition at line 227 of file pubkey.h.

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The documentation for this class was generated from the following files:

• src/pubkey.h
• src/pubkey.cpp