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)
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
constexpr uint256	MUSIG_CHAINCODE

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 257 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 135 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 168 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 77 of file musig.cpp.

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GetCPubKeyFromMuSig2KeyAggCache()

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

static

Definition at line 45 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 19 of file musig.cpp.

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MuSig2AggregatePubkeys() [1/2]

std::optional< CPubKey > MuSig2AggregatePubkeys

(

const std::vector< CPubKey > &

pubkeys

)

Definition at line 71 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 60 of file musig.cpp.

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MuSig2SessionID()

uint256 MuSig2SessionID	(	const CPubKey &	script_pubkey,
		const CPubKey &	part_pubkey,
		const uint256 &	sighash
	)

Definition at line 128 of file musig.cpp.

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Variable Documentation

MUSIG_CHAINCODE

constexpr uint256 MUSIG_CHAINCODE

constexpr

Initial value:

{
    
    []() consteval { return uint256{"868087ca02a6f974c4598924c36b57762d32cb45717167e300622c7167e38965"_hex_u8}; }(),
}

Definition at line 14 of file musig.cpp.