查询用户的材料数量
<h3>应用场景</h3>
<p>> 查询材料对应的数量</p>
<hr />
<h3>接口定义</h3>
<h4>接口URL</h4>
<p>请求方法：<code>POST</code></p>
<p>URI: <code>/chain/query/getBalanceOf</code></p>
<hr />
<h3>请求参数</h3>
<table>
<thead>
<tr>
<th>参数</th>
<th>是否必填</th>
<th>类型</th>
<th>说明</th>
<th>示例值</th>
</tr>
</thead>
<tbody>
<tr>
<td>reqNo</td>
<td>是</td>
<td>String</td>
<td>请求号，保证唯一，便于排查问题</td>
<td>"1"</td>
</tr>
<tr>
<td>nftId</td>
<td>是</td>
<td>String</td>
<td>材料的唯一标识，保证已被铸造，为"123"数字字符串 或者 "0x"开头的16进制字符串）</td>
<td>"123", "0x1A"</td>
</tr>
<tr>
<td>owner</td>
<td>是</td>
<td>String</td>
<td>材料拥有者的链账户地址</td>
<td>"6f08411eb28234871c5e84d1997becd06e0bc5f6d803da8de04ccf3635ba0d7a"</td>
</tr>
</tbody>
</table>
<h3>请求参数示例</h3>
<pre><code class="language-json">{
&quot;reqNo&quot;: &quot;1&quot;,
&quot;nftId&quot;: &quot;1&quot;,
&quot;owner&quot; : &quot;0x379c2f38f40f617fc766b527cc8afc2ec42c5e0c&quot;
}</code></pre>
<hr />
<h3>响应参数</h3>
<table>
<thead>
<tr>
<th>参数</th>
<th>说明</th>
</tr>
</thead>
<tbody>
<tr>
<td>code</td>
<td>响应码</td>
</tr>
<tr>
<td>message</td>
<td>成功</td>
</tr>
<tr>
<td>data</td>
<td></td>
</tr>
<tr>
<td>&ensp;&ensp;balance</td>
<td>NFT藏品数量</td>
</tr>
</tbody>
</table>
<h3>响应参数示例</h3>
<pre><code class="language-json">{
&quot;code&quot;: &quot;EC000000&quot;,
&quot;message&quot;: &quot;成功&quot;,
&quot;data&quot;: {
&quot;balance&quot;: &quot;1999&quot;
}
}</code></pre>