ParagonIE_Sodium_Compat::crypto_sign_seed_keypair( string $seed ): string

3120    public static function crypto_sign_seed_keypair(3121        #[\SensitiveParameter]3122        $seed3123    ) {3124        ParagonIE_Sodium_Core_Util::declareScalarType($seed, 'string', 1);3125 3126        if (self::useNewSodiumAPI()) {3127            return sodium_crypto_sign_seed_keypair($seed);3128        }3129        if (self::use_fallback('crypto_sign_keypair')) {3130            return (string) call_user_func('\\Sodium\\crypto_sign_seed_keypair', $seed);3131        }3132        $publicKey = '';3133        $secretKey = '';3134        if (PHP_INT_SIZE === 4) {3135            ParagonIE_Sodium_Core32_Ed25519::seed_keypair($publicKey, $secretKey, $seed);3136        } else {3137            ParagonIE_Sodium_Core_Ed25519::seed_keypair($publicKey, $secretKey, $seed);3138        }3139        return $secretKey . $publicKey;3140    }