<?php

namespace services;

class SignatureService {

    const ERRCODE_SIGN = 2001;

    public static function web3ServiceCheck()
    {
        $cbUuid = getReqVal('_cb_uuid', '');
        $row = SqlHelper::ormSelectOne(
            myself()->_getMarketMysql(),
            't_callback',
            array(
                'cb_uuid' => $cbUuid
            )
        );
        if (!$row) {
            myself()-_rspErr(self::ERRCODE_SIGN);
            die();
        }
        $sign = self::normalMd5Sign($_REQUEST, $row['secret_key'], array('_sign'));
        if ($sign != $row['signature']) {
            myself()-_rspErr(self::ERRCODE_SIGN);
            die();
        }
    }

    public static function normalMd5Sign($params, $secretKey, $excludeKeys){
        ksort($params);
        $paramsStr = '';
        foreach($params as $key => $val){
            if (!in_array($key, $excludeKeys)) {
                $paramsStr = $paramsStr . $key . '=' . $val . $connStr;
            }
        }
        return md5($paramsStr . $$secretKey);
    }

}