twong329/app/services/user/UserCoinService.php

<?php
namespace app\services\user;

class UserCoinService {
    /**
     *
     * @param $fromId
     * @param $toAddr
     * @param $symbol
     * @param $has
     * @param $amount
     */
    public static function transferTo($fromId, $toAddr, $symbol, $has, $amount) {

    }
}