请求参数XML:
<WalletV2><mch_appid>xxxxxxxxx</mch_appid><mchid>xxxxxxxxx</mchid><nonce_str>3PG2J4ILTKCH16CQ2502SI8ZNMTM67VS</nonce_str><partner_trade_no>100000982014120919616</partner_trade_no><openid>oF5hh5S_gKvlYPoD7ArrBjkPHVNo</openid><check_name>NO_CHECK</check_name><amount>1</amount><desc>withdraw</desc><sign>8133870E1DED1A938397FC991B6CEFB7</sign></WalletV2>
返回结果:
<return_code><![CDATA[SUCCESS]]></return_code>
<return_msg><![CDATA[SIGN_ERROR]]></return_msg>
<mch_appid><![CDATA[xxxxxxxx]]></mch_appid>
<mchid><![CDATA[xxxxxxxx]]></mchid>
<result_code><![CDATA[FAIL]]></result_code>
<err_code><![CDATA[SIGN_ERROR]]></err_code>
<err_code_des><![CDATA[签名错误]]></err_code_des>
</xml>