secp256k1_schnorrsig.h

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#ifndef SECP256K1_SCHNORRSIG_H
#define SECP256K1_SCHNORRSIG_H
 
#include "secp256k1.h"
#include "secp256k1_extrakeys.h"
 
#ifdef __cplusplus
extern "C" {
#endif


typedef int (*secp256k1_nonce_function_hardened)(
    unsigned char *nonce32,
    const unsigned char *msg,
    size_t msglen,
    const unsigned char *key32,
    const unsigned char *xonly_pk32,
    const unsigned char *algo,
    size_t algolen,
    void *data
);

SECP256K1_API const secp256k1_nonce_function_hardened secp256k1_nonce_function_bip340;

typedef struct secp256k1_schnorrsig_extraparams {
    unsigned char magic[4];
    secp256k1_nonce_function_hardened noncefp;
    void *ndata;
} secp256k1_schnorrsig_extraparams;
 
#define SECP256K1_SCHNORRSIG_EXTRAPARAMS_MAGIC { 0xda, 0x6f, 0xb3, 0x8c }
#define SECP256K1_SCHNORRSIG_EXTRAPARAMS_INIT {\
    SECP256K1_SCHNORRSIG_EXTRAPARAMS_MAGIC,\
    NULL,\
    NULL\
}

SECP256K1_API int secp256k1_schnorrsig_sign32(
    const secp256k1_context *ctx,
    unsigned char *sig64,
    const unsigned char *msg32,
    const secp256k1_keypair *keypair,
    const unsigned char *aux_rand32
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);

SECP256K1_API int secp256k1_schnorrsig_sign_custom(
    const secp256k1_context *ctx,
    unsigned char *sig64,
    const unsigned char *msg,
    size_t msglen,
    const secp256k1_keypair *keypair,
    secp256k1_schnorrsig_extraparams *extraparams
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(5);

SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_schnorrsig_verify(
    const secp256k1_context *ctx,
    const unsigned char *sig64,
    const unsigned char *msg,
    size_t msglen,
    const secp256k1_xonly_pubkey *pubkey
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(5);
 
#ifdef __cplusplus
}
#endif
 
#endif /* SECP256K1_SCHNORRSIG_H */