text: #ifndef crypto_sign_ed25519_H
  #define crypto_sign_ed25519_H
  
  #include <stddef.h>
  #include "crypto_hash_sha512.h"
  #include "export.h"
  
  #ifdef __cplusplus
  # ifdef __GNUC__
  #  pragma GCC diagnostic ignored "-Wlong-long"
  # endif
  extern "C" {
  #endif
  
  typedef struct crypto_sign_ed25519ph_state {
      crypto_hash_sha512_state hs;
  } crypto_sign_ed25519ph_state;
  
  SODIUM_EXPORT
  size_t crypto_sign_ed25519ph_statebytes(void);
  
  #define crypto_sign_ed25519_BYTES 64U
  SODIUM_EXPORT
  size_t crypto_sign_ed25519_bytes(void);
  
  #define crypto_sign_ed25519_SEEDBYTES 32U
  SODIUM_EXPORT
  size_t crypto_sign_ed25519_seedbytes(void);
  
  #define crypto_sign_ed25519_PUBLICKEYBYTES 32U
  SODIUM_EXPORT
  size_t crypto_sign_ed25519_publickeybytes(void);
  
  #define crypto_sign_ed25519_SECRETKEYBYTES (32U + 32U)
  SODIUM_EXPORT
  size_t crypto_sign_ed25519_secretkeybytes(void);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519(unsigned char *sm, unsigned long long *smlen_p,
                          const unsigned char *m, unsigned long long mlen,
                          const unsigned char *sk);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_open(unsigned char *m, unsigned long long *mlen_p,
                               const unsigned char *sm, unsigned long long smlen,
                               const unsigned char *pk)
              __attribute__ ((warn_unused_result));
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_detached(unsigned char *sig,
                                   unsigned long long *siglen_p,
                                   const unsigned char *m,
                                   unsigned long long mlen,
                                   const unsigned char *sk);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_verify_detached(const unsigned char *sig,
                                          const unsigned char *m,
                                          unsigned long long mlen,
                                          const unsigned char *pk)
              __attribute__ ((warn_unused_result));
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_keypair(unsigned char *pk, unsigned char *sk);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_seed_keypair(unsigned char *pk, unsigned char *sk,
                                       const unsigned char *seed);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_pk_to_curve25519(unsigned char *curve25519_pk,
                                           const unsigned char *ed25519_pk)
              __attribute__ ((warn_unused_result));
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_sk_to_curve25519(unsigned char *curve25519_sk,
                                           const unsigned char *ed25519_sk);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_sk_to_seed(unsigned char *seed,
                                     const unsigned char *sk);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519_sk_to_pk(unsigned char *pk, const unsigned char *sk);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519ph_init(crypto_sign_ed25519ph_state *state);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519ph_update(crypto_sign_ed25519ph_state *state,
                                   const unsigned char *m,
                                   unsigned long long mlen);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519ph_final_create(crypto_sign_ed25519ph_state *state,
                                         unsigned char *sig,
                                         unsigned long long *siglen_p,
                                         const unsigned char *sk);
  
  SODIUM_EXPORT
  int crypto_sign_ed25519ph_final_verify(crypto_sign_ed25519ph_state *state,
                                         unsigned char *sig,
                                         const unsigned char *pk)
              __attribute__ ((warn_unused_result));
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif
  