code: public static byte [] scalseMult_base(byte [] n) {
              if (!(n.length==scalarLength))
                  return null;
  
              byte [] q = new byte [scalarLength];
  
              crypto_scalarmult_base(q, n);
  
              return q;
          }
docs: /*
  @description
  Multiplies an integer n by a standard group element and
  returns the resulting group element.