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index.html
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<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>Payment request</title>
<script type="text/javascript" charset="utf-8" src="vendor/jquery-3.4.1.min.js"></script>
<script type="text/javascript" src="vendor/jquery-ui.min.js"></script>
<script type="text/javascript" src="vendor/qrcode.js"></script>
<link rel="stylesheet" type="text/css"
href="vendor/jquery-ui-themes-1.12.1/themes/ui-lightness/jquery-ui.css">
<style type="text/css">
body {
font-family: Arial;
}
.tab {
overflow: hidden;
border: 1px solid #ccc;
background-color: #f1f1f1;
}
.tab button {
background-color: inherit;
float: left;
border: none;
outline: none;
cursor: pointer;
padding: 14px 16px;
transition: 0.3s;
}
.tab button:hover {
background-color: #ddd;
}
.tab button.active {
background-color: #ccc;
}
.tabcontent {
display: none;
padding: 6px 12px;
border: 1px solid #ccc;
border-top: none;
}
.column {
float: left;
width: 50%;
}
.row{
padding: 26px 26px;
border: 1px solid #ccc;
}
.row:after {
content: "";
display: table;
clear: both;
}
.paybutton{
width:100%;
background-color:#ccc;
border-radius: 5px;
padding:10px;
}
#progressbar {
position: relative;
background: #555;
}
.progress-label {
position: absolute;
top: 8px;
color: #fff;
font-weight: bold;
text-shadow: 1px 1px 0 #000;
}
</style>
</head>
<body>
<div style="width:20em; margin:auto; font-family:arial, serif;">
<div class="error" id="error"></div>
<div id="container">
<div id="progressbar">
<div class="progress-label" style="left: 5%;" id="progress-text"></div>
<div class="progress-label" style="right: 5%;" id="progress-timer"></div>
</div>
<div class="row">
<div id="reason" style="float:left; width:50%"></div>
<div id="amount" style="float:right; width:50%"></div>
</div>
<!-- Tab links -->
<div class="tab">
<button id="onchain_button" class="tablinks" onclick="openTab('onchain')">On-chain</button>
<button id="lightning_button" class="tablinks" onclick="openTab('lightning')">Lightning</button>
</div>
<!-- Tab content -->
<div id="lightning" class="tabcontent">
<div id="qr1" align="center"></div>
<div class="error" id="lnerror" style="height:15em; text-align:justify;"></div>
<div>
<button class="paybutton">
<a style="color:#000; text-decoration:none;" id="paylink1" target="_blank">Open in Wallet</a>
</button>
</div>
<div>
<button id="copy1" class="paybutton" onclick="doCopy(this.value)" value="">
Copy Lightning Request
</button>
</div>
</div>
<div id="onchain" class="tabcontent">
<div id="qr2" align="center"></div>
<div class="error" id="onchainerror" style="height:15em; text-align:justify;"></div>
<div>
<button class="paybutton">
<a style="color:#000; text-decoration:none;" id="paylink2" target="_blank">Open in Wallet</a>
</button>
</div>
<div>
<button id="copy2" class="paybutton" onclick="doCopy(this.value)" value="">
Copy Bitcoin URI
</button>
</div>
</div>
<p id="powered" style="font-size:80%;"></p>
</div>
</div>
<script type="text/javascript">
function doCopy(text){
navigator.clipboard.writeText(text);
alert("Copied to Clipboard: " + text);
}
function openTab(tabName){
$(".tabcontent").hide();
$(".tablinks").removeClass("active");
$("#"+tabName).show();
$("#"+tabName+"_button").addClass("active");
}
function paymentExpired(){
$(".tabcontent").hide();
$(".tablinks").removeClass("active");
$("#progress-text").html("This invoice has expired");
$(".ui-widget-header").css("background", "#f33");
}
function paymentReceived(){
$(".tabcontent").hide();
$(".tablinks").removeClass("active");
$("#progress-text").html("Payment received.");
$(".ui-widget-header").css("background", "#0a0");
payment_received = true;
$("#progress-timer").text("");
$("#progressbar").progressbar({
value: 100,
max: 100
});
}
function paymentUnknown(){
$("#progress-text").html('Error: Unknown invoice');
$("#progressbar").progressbar({
value: 100,
max:100
});
$(".ui-widget-header").css("background", "#f33");
}
/* AI generated code: This function was written by ChatGPT. Copyright is dubious!!! */
function formatTime(timeInSeconds) {
var hours = Math.floor(timeInSeconds / 3600);
var minutes = Math.floor((timeInSeconds - (hours * 3600)) / 60);
var seconds = timeInSeconds - (hours * 3600) - (minutes * 60);
if (hours < 10) {
hours = "0" + hours;
}
if (minutes < 10) {
minutes = "0" + minutes;
}
if (seconds < 10) {
seconds = "0" + seconds;
}
return hours + ":" + minutes + ":" + seconds;
}
/* end of AI generated code */
function getUrlParameter(sParam)
{
var sPageURL = window.location.search.substring(1);
var sURLVariables = sPageURL.split('&');
for (var i = 0; i < sURLVariables.length; i++)
{
var sParameterName = sURLVariables[i].split('=');
if (sParameterName[0] == sParam)
{
return sParameterName[1];
}
}
}
var id = getUrlParameter('id');
var payment_received = false;
if (id) {
var jqxhr = $.getJSON("/api/get_invoice?" + id, function() {
console.log("getJSON:success");
})
.done(function(data) {
var typeNumber = 0;
var errorCorrectionLevel = 'L';
var URI;
var request;
$("<p />").text("Powered by Electrum").appendTo($("p#powered"));
if(!data) {
paymentUnknown();
return;
}
if (data.is_lightning){
if (data.can_receive){
request = data.lightning_invoice;
URI = 'lightning:' + request;
var qr1 = qrcode(typeNumber, errorCorrectionLevel);
qr1.addData(request.toUpperCase());
qr1.make();
$("#payreq1").text(request);
$("#qr1").html(qr1.createImgTag(3));
$("#copy1").val(request);
$("#paylink1").attr("href", URI);
$("#lnerror").hide();
} else {
$("#lnerror").text("Error: The server does not have enough inbound capacity to receive this amount with lightning. Try reloading this page later, or pay onchain.");
$(".tabcontent").hide();
}
}
if (data.address){
URI = data.URI;
if (data.bip70_url) URI += '&r=' + data.bip70_url;
request = URI;
var qr2 = qrcode(typeNumber, errorCorrectionLevel);
qr2.addData(URI);
qr2.make();
$("#payreq2").text(request);
$("#qr2").html(qr2.createImgTag(6));
$("#copy2").val(URI);
$("#paylink2").attr("href", URI);
$("#onchainerror").hide();
} else {
$("#onchainerror").text("This request cannot be paid on-chain.");
$(".tabcontent").hide();
}
$("#reason").text(data.message || "no description");
$("#amount").text(data.amount_BTC + " BTC");
$(function () {
var current;
var max = 100;
var initial = data.timestamp;
var duration = data.expiration - data.timestamp;
$("#progressbar").progressbar({
value: 100,
max:max
});
$("#progress-text").text("Awaiting payment...");
if(data.expiration){
function update() {
var seconds = (Math.floor(Date.now()/1000) - initial);
var current = 100 * (seconds)/duration;
var remaining = duration - seconds
if(!payment_received){
$("#progressbar").progressbar({
value: current,
max:max
});
if (current < max) {
$("#progress-timer").text(formatTime(remaining));
}
}
};
update();
var interval = setInterval(update, 1000);
}
});
if(data.is_lightning) {
openTab('lightning');
} else {
openTab('onchain');
}
var wss_address = (document.URL.startsWith("https") ? "wss" : "ws") + "://" + window.location.host +"/api/get_status?" + id;
console.log("Opening WSS: " + wss_address)
var ws = new WebSocket(wss_address);
var received_msg;
ws.onmessage = function (evt) {
received_msg = evt.data;
if(received_msg == 'paid') {
paymentReceived();
}
if(received_msg == 'expired') {
paymentExpired();
}
}
ws.onerror = function () {
console.log("error ws.onerror");
$("#error").text("error with websocket. try reloading this page");
};
ws.onclose = function () {
console.log("error ws.onclose");
if(received_msg == 'waiting')
$("#error").text("error with websocket: socket was closed. try reloading this page");
};
})
.fail(function() {
console.log("error fail while fetching invoice json");
$("#error").text("error while fetching invoice json. try reloading this page");
});
};
// See http://stackoverflow.com/questions/29186154/chrome-clicking-mailto-links-closes-websocket-connection
$(document).on('click', 'a[href^="bitcoin:"]', function (e) {
e.preventDefault();
var btcWindow = window.open($(e.currentTarget).attr('href'));
btcWindow.close();
return false;
});
</script>
</body>
</html>