musig.cpp File Reference

#include <musig.h>
#include <key.h>
#include <random.h>
#include <support/allocators/secure.h>
#include <secp256k1_musig.h>

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Classes
class	MuSig2SecNonceImpl

Functions
static bool	GetMuSig2KeyAggCache (const std::vector< CPubKey > &pubkeys, secp256k1_musig_keyagg_cache &keyagg_cache)
static std::optional< CPubKey >	GetCPubKeyFromMuSig2KeyAggCache (secp256k1_musig_keyagg_cache &keyagg_cache)
std::optional< CPubKey >	MuSig2AggregatePubkeys (const std::vector< CPubKey > &pubkeys, secp256k1_musig_keyagg_cache &keyagg_cache, const std::optional< CPubKey > &expected_aggregate)
	Compute the full aggregate pubkey from the given participant pubkeys in their current order. More...
std::optional< CPubKey >	MuSig2AggregatePubkeys (const std::vector< CPubKey > &pubkeys)
CExtPubKey	CreateMuSig2SyntheticXpub (const CPubKey &pubkey)
	Construct the BIP 328 synthetic xpub for a pubkey. More...
uint256	MuSig2SessionID (const CPubKey &script_pubkey, const CPubKey &part_pubkey, const uint256 &sighash, const std::vector< uint8_t > &pubnonce)
	Computes an arbitrary unique session ID to identify ongoing signing sessions. More...
std::vector< uint8_t >	CreateMuSig2Nonce (MuSig2SecNonce &secnonce, const uint256 &sighash, const CKey &our_seckey, const CPubKey &aggregate_pubkey, const std::vector< CPubKey > &pubkeys)
std::optional< uint256 >	CreateMuSig2PartialSig (const uint256 &sighash, const CKey &our_seckey, const CPubKey &aggregate_pubkey, const std::vector< CPubKey > &pubkeys, const std::map< CPubKey, std::vector< uint8_t > > &pubnonces, MuSig2SecNonce &secnonce, const std::vector< std::pair< uint256, bool > > &tweaks)
std::optional< std::vector< uint8_t > >	CreateMuSig2AggregateSig (const std::vector< CPubKey > &part_pubkeys, const CPubKey &aggregate_pubkey, const std::vector< std::pair< uint256, bool > > &tweaks, const uint256 &sighash, const std::map< CPubKey, std::vector< uint8_t > > &pubnonces, const std::map< CPubKey, uint256 > &partial_sigs)

Variables
const ChainCode	MUSIG_CHAINCODE {"868087ca02a6f974c4598924c36b57762d32cb45717167e300622c7167e38965"_hex_u8}

Function Documentation

CreateMuSig2AggregateSig()

std::optional< std::vector< uint8_t > > CreateMuSig2AggregateSig	(	const std::vector< CPubKey > &	part_pubkeys,
		const CPubKey &	aggregate_pubkey,
		const std::vector< std::pair< uint256, bool > > &	tweaks,
		const uint256 &	sighash,
		const std::map< CPubKey, std::vector< uint8_t > > &	pubnonces,
		const std::map< CPubKey, uint256 > &	partial_sigs
	)

Definition at line 254 of file musig.cpp.

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CreateMuSig2Nonce()

std::vector< uint8_t > CreateMuSig2Nonce	(	MuSig2SecNonce &	secnonce,
		const uint256 &	sighash,
		const CKey &	our_seckey,
		const CPubKey &	aggregate_pubkey,
		const std::vector< CPubKey > &	pubkeys
	)

Definition at line 132 of file musig.cpp.

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CreateMuSig2PartialSig()

std::optional< uint256 > CreateMuSig2PartialSig	(	const uint256 &	sighash,
		const CKey &	our_seckey,
		const CPubKey &	aggregate_pubkey,
		const std::vector< CPubKey > &	pubkeys,
		const std::map< CPubKey, std::vector< uint8_t > > &	pubnonces,
		MuSig2SecNonce &	secnonce,
		const std::vector< std::pair< uint256, bool > > &	tweaks
	)

Definition at line 165 of file musig.cpp.

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CreateMuSig2SyntheticXpub()

CExtPubKey CreateMuSig2SyntheticXpub

(

const CPubKey &

pubkey

)

Construct the BIP 328 synthetic xpub for a pubkey.

Definition at line 74 of file musig.cpp.

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GetCPubKeyFromMuSig2KeyAggCache()

static std::optional< CPubKey > GetCPubKeyFromMuSig2KeyAggCache ( secp256k1_musig_keyagg_cache &  keyagg_cache )

static

Definition at line 42 of file musig.cpp.

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GetMuSig2KeyAggCache()

static bool GetMuSig2KeyAggCache ( const std::vector< CPubKey > &  pubkeys, secp256k1_musig_keyagg_cache &  keyagg_cache  )

static

Definition at line 16 of file musig.cpp.

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MuSig2AggregatePubkeys() [1/2]

std::optional< CPubKey > MuSig2AggregatePubkeys

(

const std::vector< CPubKey > &

pubkeys

)

Definition at line 68 of file musig.cpp.

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MuSig2AggregatePubkeys() [2/2]

std::optional< CPubKey > MuSig2AggregatePubkeys	(	const std::vector< CPubKey > &	pubkeys,
		secp256k1_musig_keyagg_cache &	keyagg_cache,
		const std::optional< CPubKey > &	expected_aggregate
	)

Compute the full aggregate pubkey from the given participant pubkeys in their current order.

Outputs the secp256k1_musig_keyagg_cache and validates that the computed aggregate pubkey matches an expected aggregate pubkey. This is necessary for most MuSig2 operations.

Definition at line 57 of file musig.cpp.

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MuSig2SessionID()

uint256 MuSig2SessionID	(	const CPubKey &	script_pubkey,
		const CPubKey &	part_pubkey,
		const uint256 &	sighash,
		const std::vector< uint8_t > &	pubnonce
	)

Computes an arbitrary unique session ID to identify ongoing signing sessions.

It is the SHA256 of the aggregate xonly key, the participant pubkey, the sighash, and the pubnonce

Definition at line 125 of file musig.cpp.

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Variable Documentation

MUSIG_CHAINCODE

const ChainCode MUSIG_CHAINCODE {"868087ca02a6f974c4598924c36b57762d32cb45717167e300622c7167e38965"_hex_u8}

Definition at line 14 of file musig.cpp.