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                <h4>In this demo, it helps you to understand how to create a cluase and provide a comment to user.</h4>
<!--Part 1: create buy me a cofffe config  -->
<h4>Buy me a coffee</h4>
<fieldset style="width:40%">
  <legend>Buy me a coffee - config</legend>
  <label for="address">Your address:</label>
  <input type="text" id="address" name="address" value="0x70aE85A2fF6030366F512DbcD60Be3828139b498"><br><br>
  <label for="amount">Amount:</label>
  <input type="number" id="amount" name="amount" value="100">VET / cup<br><br>
  <label for="message">Message:</label>
 <textarea id="message" name="message">Thanks for supporting my apllication 😊</textarea><br><br>
  <input type="submit" value="Save config" onclick="saveConfig()"></input>
<!--Part2: a button which embed in article/application ...etcs -->
<div id="supportDiv" style="display:none">
  <label>Buy me a coffee</label>
  <input type="radio" checked name="cups" id="one" value="1">1 Cup</input>
  <input type="radio"  name="cups" id="two" value="2">2 Cups</input>
  <input type="radio"  name="cups"id="three" value="3">3 Cups</input>
<input onclick="signTx()" type="submit" value="Buy"></input>
<pre id="result"></pre>




                const vendor = new Connex.Vendor("test");
var configDetails = ""

function saveConfig() {
  configDetails = {
    to: document.getElementById("address").value,
    value: parseInt(document.getElementById("amount").value), 
    data: "0x",
    message: document.getElementById("message").value

  alert("Config saved,Please click BUY to continue");

function signTx() {
  var cups = 1;
  const cupsRadio = document.getElementsByName("cups");
  for (var i = 0; i < cupsRadio.length; i++) {
    if (cupsRadio[i].checked) {
      cups = cupsRadio[i].value;
    .sign("tx", [
        value: configDetails.value * 1e18 * cups,
        // Click cluase to view comment
        comment: "support " + configDetails.value*cups +" VET"
    // .accepted(() => alert("accepted"))
    .then((r) => document.getElementById("result").innerText=JSON.stringify(r,null,4))
    .catch((e) => console.log("error:" + e.message));