int ed25519_amd64_51_30k_seckey(unsigned char *sk);
int ed25519_amd64_51_30k_seckey_expand(unsigned char *sk,const unsigned char *seed);
int ed25519_amd64_51_30k_pubkey(unsigned char *pk,const unsigned char *sk);
int ed25519_amd64_51_30k_keygen(unsigned char *pk,unsigned char *sk);