错误码
<h2>5. 错误码</h2>
<table>
<thead>
<tr>
<th>RetCode</th>
<th>描述</th>
</tr>
</thead>
<tbody>
<tr>
<td>0</td>
<td>成功</td>
</tr>
<tr>
<td>9999</td>
<td>业务异常，具体错误详见RetMsg字段</td>
</tr>
<tr>
<td>0100</td>
<td>通道异常</td>
</tr>
<tr>
<td>0010</td>
<td>系统错误</td>
</tr>
<tr>
<td>0013</td>
<td>签名错误</td>
</tr>
<tr>
<td>0014</td>
<td>参数错误</td>
</tr>
<tr>
<td>0015</td>
<td>商户不存在</td>
</tr>
</tbody>
</table>