connect to walletconnect with Dapp - frontend

I created my own lottery smart contract and also created front ends Dapp in html and javascript. I before used metamask for connecting. and also I used infura for connecting without metamask. but now I want to connect the project to trust wallet in phone with walletconnect. But I cannot find true code for connecting dapp to trust wallet with walletconnect. Please someone help me to connect html front end to the trust wallet with Qr-code. If you need to see my project I can send all code of my project for you.
I used before this code for wallet connect:
<div class="container">
<div class="row">
<div class="col-md-12">
<h5>Web3modal example for vanille JavaScript and HTML</h5>
<p>No wallet connected. Connect wallet to show accounts and their ETH balances.</p>
<div class="alert alert-danger" id="alert-error-https" style="display: none">
You can run this example only over HTTPS connection.
</div>
<div id="prepare">
<button class="btn btn-primary" id="btn-connect">
Connect wallet
</button>
</div>
<div id="connected" style="display: none">
<button class="btn btn-primary" id="btn-disconnect">
Disconnect wallet
</button>
<hr>
<div id="network">
<p>
<strong>Connected blockchain:</strong> <span id="network-name"></span>
</p>
<p>
<strong>Selected account:</strong> <span id="selected-account"></span>
</p>
</div>
<hr>
<h4>All account balances</h4>
<table class="table table-listing">
<thead>
<th>Address</th>
<th>ETH balance</th>
</thead>
<tbody id="accounts">
</tbody>
</table>
<p>Please try to switch between different accounts in your wallet if your wallet supports this functionality.</p>
</div>
<br>
<div class="well">
<p class="text-muted">See also the TypeScript and React example application</p>
</div>
</div>
</div>
</div>
<!-- We use simple <template> templating for the example -->
<div id="templates" style="display: none">
<template id="template-balance">
<tr>
<th class="address"></th>
<td class="balance"></td>
</tr>
</template>
</div>
<script type="text/javascript" src="https://unpkg.com/web3#1.2.11/dist/web3.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/web3modal#1.9.0/dist/index.js"></script>
<script type="text/javascript" src="https://unpkg.com/evm-chains#0.2.0/dist/umd/index.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/#walletconnect/web3-provider#1.2.1/dist/umd/index.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/fortmatic#2.0.6/dist/fortmatic.js"></script>
<!-- This is our example code -->
<script type="text/javascript" src="./example.js"></script>
and also this code for normal connect :
if (typeof window.ethereum !== 'undefined')
{
console.log('MetaMask is installed!');
web333 = new Web3(web3.currentProvider);
const accountsH = ethereum.request({ method: 'eth_requestAccounts' });
const accountH = accountsH[0];
const showAccountH = document.querySelector('.showAccount');
const accounts = ethereum.request({ method: 'eth_requestAccounts' });
const account = accounts[0];
const showAccount = document.querySelector('.showAccount');
}else{
console.log('MetaMask not installed!');
alert("Please install Metamsk wallet first, then try again");
web333 = new Web3(new Web3.providers.HttpProvider("https://ropsten.infura.io/v3/3c68/* my infura ID */5811f301753"));
}
var addressH = "0x35C00a/*MY CONTRACT ADDRESS */8D639145";
var abiH =[/*my contract ABI*/];
contractH = new web333.eth.Contract(abiH, addressH);
I want to connect trust wallet and metamask and can connect to the other wallet. I want the global type of code for all wallets.

<div class="container">
<div class="row">
<div class="col-md-12">
<h5>Web3modal example for vanille JavaScript and HTML</h5>
<p>No wallet connected. Connect wallet to show accounts and their ETH balances.</p>
<div class="alert alert-danger" id="alert-error-https" style="display: none">
You can run this example only over HTTPS connection.
</div>
<div id="prepare">
<button class="btn btn-primary" id="btn-connect">
Connect wallet
</button>
</div>
<div id="connected" style="display: none">
<button class="btn btn-primary" id="btn-disconnect">
Disconnect wallet
</button>
<hr>
<div id="network">
<p>
<strong>Connected blockchain:</strong> <span id="network-name"></span>
</p>
<p>
<strong>Selected account:</strong> <span id="selected-account"></span>
</p>
</div>
<hr>
<h4>All account balances</h4>
<table class="table table-listing">
<thead>
<th>Address</th>
<th>ETH balance</th>
</thead>
<tbody id="accounts">
</tbody>
</table>
<p>Please try to switch between different accounts in your wallet if your wallet supports this functionality.</p>
</div>
<br>
<div class="well">
<p class="text-muted">See also the TypeScript and React example application</p>
</div>
</div>
</div>
</div>
<!-- We use simple <template> templating for the example -->
<div id="templates" style="display: none">
<template id="template-balance">
<tr>
<th class="address"></th>
<td class="balance"></td>
</tr>
</template>
</div>
<script type="text/javascript" src="https://unpkg.com/web3#1.2.11/dist/web3.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/web3modal#1.9.0/dist/index.js"></script>
<script type="text/javascript" src="https://unpkg.com/evm-chains#0.2.0/dist/umd/index.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/#walletconnect/web3-provider#1.2.1/dist/umd/index.min.js"></script>
<script type="text/javascript" src="https://unpkg.com/fortmatic#2.0.6/dist/fortmatic.js"></script>
<!-- This is our example code -->
<script type="text/javascript" src="./example.js"></script>

Related

SyntaxError: missing ) after argument list can't seem to find possible solution

What is the issue, Where did I go wrong? This is the code for index.ejs i made minor changes to my previous old_index.ejs. i have been struggling with this issue and the backend does have await function for calling aleph-js (aleph.im) so i don't think it's any issue about async.
**strong text**<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js"
integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN"
crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js"
integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q"
crossorigin="anonymous"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"
integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl"
crossorigin="anonymous"></script>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css"
integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-3 rooms-sidebar">
<div class="card no-outline">
<div class="card-body">
<small>Logged in as</small><br>
<b>
hook this up later<br>
</b>
</div>
</div>
<hr>
<hr>
<div class="card no-outline mb-2 room-card">
<div class="card-body">
<span class='name'>
Chat
</span><br>
<span class='member-count'>
<small>
99 Members
</small>
</span>
</div>
</div>
</div>
<div class="col-9">
<div class="chat-room">
<nav class="navbar navbar-light">
<span class="navbar-brand" href="#">
<b>
Chat
</b>
</span>
<small>
99 Members
</small>
</nav>
<div id="messages">
<% posts.forEach((post)=> { %>
<% var parsed_item=JSON.parse(post.item_content) %>
<div class="message mb-2">
<div class="content-container">
<div class="content">
<%= parsed_item.content.body %>
</div>
<div class="author">
<%= parsed_item.address %>
</div>
</div>
</div>
<% }) %>
</div>
<div class="chat-box">
<form action="/messages" method="post" id='message-form'>
<div class="input-group">
<input type='text' name="message" id="message" cols="30" rows="10" class="form-control">
<div class="input-group-append"></div>
<input type="submit" value="Post Message" class="btn btn-primary">
</div>
</form>
</div>
</div>
</div>
</div>
</div>
<%= posts %>
<script type='text/javascript'>
$(document).ready(() => {
const socket = new WebSocket('wss://api2.aleph.im/api/ws0/messages?msgType=POST&contentType=chat')
socket.onmessage = (e) => {
let message = JSON.parse(e.data)
console.log(message)
let content = message.content.content.body;
$('#messages-list').prepend(`<li>${content}</li>`)
}
$('#message-form').submit((e) => {
e.preventDefault();
$.post('/messages', $('#message-form').serialize())
$('#message-form textarea').val('')
})
})
</script>
</body>
</html>
<%= 'me' if message.user == current_user %>
Refer The Image

how can i send data without reloading form node js and ejs

there. I am creating a blog website and I want to post some comments on that post. but the form is reloading am not getting data to store MongoDB. I search on the internet so I got ajax but ajax is not working and this is new for me. help me out with this problem. I am using node js and ejs templating and MongoDB.
node js code
app.post("/do-comment", async (req,res) =>{
const comment = new Comment({name:req.body.name,comment:req.body.comment});
await comment.save();
await Blog.findOneAndUpdate({_id:req.body._id}, {$push: {comment}});
res.send("Comment was added successfully");
})
HTML code
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Blogs</title>
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
</script>
<!-- CSS only -->
<link href="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<!-- JavaScript Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap#5.0.2/dist/js/bootstrap.bundle.min.js" integrity="sha384-MrcW6ZMFYlzcLA8Nl+NtUVF0sA7MsXsP1UyJoMp4YLEuNSfAP+JcXn/tWtIaxVXM" crossorigin="anonymous"></script>
</head>
<body>
<nav class="navbar navbar-expand-lg navbar-light bg-primary">
<div class="container-fluid">
<a class="navbar-brand" href="#">Blogs</a>
<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarTogglerDemo02" aria-controls="navbarTogglerDemo02" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarTogglerDemo02">
<ul class="navbar-nav me-auto mb-2 mb-lg-0">
<li class="nav-item">
<a class="nav-link active" aria-current="page" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link" href="/compose">compose</a>
</li>
<li class="nav-item">
<a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Disabled</a>
</li>
</ul>
<form class="d-flex">
<input class="form-control me-2" type="search" placeholder="Search" aria-label="Search">
<button class="btn btn-outline-success" type="submit">Search</button>
</form>
</div>
</div>
</nav>
<div class="container">
<div class="col">
<img src="data:image/<%=post.image.contentType%>;base64,
<%=post.image.data.toString('base64')%>" alt="photo"width="1000px" height="500px" alt="photu">
<h1><%= post.title %></h1>
<p><%= post.content %></p>
</div>
<div class=''>
// form is here for comment
<form method="POST" onsubmit="return doComment(this);" class="theme-form-one">
<input type="hidden" name="_id" value="<%=post._id %>">
<div class="row">
<div class="col-md-6 col-12"><input type="text" name="name" placeholder="Name"></div>
<div class="col-12"><textarea name="comment" placeholder="Comments"></textarea></div>
</div>
<button class="theme-button-one">POST COMMENT</button>
</form>
</div>
//// catching comments here
<div class="">
<div class="container-fluid">
<% data.forEach(function(cData){ %>
<h1><%= cData.name %></h1>
<p><%= cData.comment %></p>
<% }) %>
</div>
</div>
</div>
//js code here
<script>
function doComment(form){
$.ajax({
url:"/post/do-comment",
method:"POST",
data:{name:form.name.value,comment:form.comment.value,
_id:form._id.value},
success: function(response){
alert(response);
}
});
return false;
}
</script>
</body>
</html>

How does routing affect form validation

I'm working on my first project in node and I'm trying to validate the a form using jQuery validation http://jqueryvalidation.org
I have it working on jsfiddle http://jsfiddle.net/o16u2fLq/ , but in my project my form is submitting without the validations. I think it has to do with how I'm routing the form, but I'm not sure what the problem is.
Here are my routes:
var express = require('express');
var router = express.Router();
var Greeting = require('../models/greetings');
router.get('/', function(req, res) {
Greeting.getGreetings(req).then(function (greetings) {
res.render('index', { greetings: greetings });
res.redirect('/');
});
});
router.post('/greeting', function(req, res){
console.log(req.body);
Greeting.createGreeting(req, res);
res.redirect('/');
Greeting.getGreetings(req).then(function (greetings) {
res.render('index', { greetings: greetings });
});
});
module.exports = router;
I've tried playing around with the routes, but nothing was working. How am I able to validate the form before posting the submission?
Edit:
html as requested
<!DOCTYPE html>
<html>
<head>
<link href="./bower_components/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet">
<link rel="stylesheet" href="./bower_components/jquery-ui/themes/smoothness/jquery-ui.css">
<link rel="stylesheet" href="./css/custom.css">
</head>
<body>
<div class="container-fluid" style="padding-top:20px">
<form action="/greeting" method="Post" enctype="application/x-www-form-urlencoded" class="form-horizontal col-lg-4" id="welcome">
<div class="form-group">
<label for="guest" class="col-lg-3 control-label">Guest Name: </label>
<div class="col-lg-9">
<input type="text" class="form-control" id="guest" name="guest">
</div>
</div>
<div class="form-group">
<label for="message" class="col-lg-3 control-label">Message: </label>
<div class="col-lg-9">
<textarea class="form-control" id="message" name="message" rows="3"></textarea>
</div>
</div>
<div class="form-group">
<label for="datepicker" class="col-lg-3 control-label">Date: </label>
<div class="col-lg-9">
<input type="text" class="form-control" name="display_date" id="datepicker">
</div>
</div>
<div class="form-group">
<div class="col-lg-offset-3 col-lg-9">
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</div>
</form>
<div class="col-lg-offset-2 col-lg-5">
<table class="table">
<thead>
<th>
Guest
</th>
<th>
Message
</th>
</thead>
<tbody>
<% for(var i=0; i < greetings.length; i++) { %>
<tr>
<td><%= greetings[i].guest %></td>
<td><%= greetings[i].message %></td>
</tr>
<% } %>
</tbody>
</table>
</div>
</div>
</body>
<script src="https://code.jquery.com/jquery-2.1.4.js"></script>
<script src="./bower_components/jquery-ui/jquery-ui.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>
<script src="https://cdn.jsdelivr.net/jquery.validation/1.14.0/jquery.validate.js"></script>
<script src="./scripts/custom.js"></script>
<script>
$(function() {
$( "#datepicker" ).datepicker();
});
</script>
</html>
in my openion
create a validator.js file
add all validations
in app.js file first you point to the valdator, after go to router folder

how can I show car's details When click on their names

I am making a website with node.js and I am new ,I want to learn a method if there is.I list cars using ul and when I click on a car name i want to show car's details. How can I do it.
html
<template name="vehicles">
<section id="vehicles" class="container">
<div class="row">
<div class="col-md-12">
<h2 class="title wow fadeInDown" data-wow-offset="200">Vehicle Models - <span class="subtitle">Our rental fleet at a glance</span></h2>
</div>
<!-- Vehicle nav start -->
<div class="col-md-3 vehicle-nav-row wow fadeInUp" data-wow-offset="100">
<div id="vehicle-nav-container">
<ul class="vehicle-nav">
{{#each showcarnames}}
<li class="active">{{aracmarka}}<span class="active"> </span></li>
{{/each}}
</ul>
</div>
<div class="vehicle-nav-control">
<a class="vehicle-nav-scroll" data-direction="up" href="#"><i class="fa fa-chevron-up"></i></a>
<a class="vehicle-nav-scroll" data-direction="down" href="#"><i class="fa fa-chevron-down"></i></a>
</div>
</div>
<!-- Vehicle nav end -->
<!-- Vehicle 1 data start -->
<div class="vehicle-data" id="vehicle-1">
<div class="col-md-6 wow fadeIn" data-wow-offset="100">
<div class="vehicle-img">
<img class="img-responsive" src="img/vehicle1.jpg" alt="Vehicle">
</div>
</div>
<div class="col-md-3 wow fadeInUp" data-wow-offset="200">
<div class="vehicle-price">$ 37.40 <span class="info">rent per day</span></div>
<table class="table vehicle-features">
<tr>
<td>Marka</td>
<td>{{carmark}}</td>
</tr>
<tr>
<td>Model</td>
<td>{{carmodel}}</td>
</tr>
</table>
<span class="glyphicon glyphicon-calendar"></span> Reserve now
</div>
</div>
js
Template.vehicles.helpers({
showcarnames: function() {
return cars.find();
}
});
I would approach this problem using Session. You could target the data using a click event:
Template.vehicles.events({
'click .vehicle-nav li': function(){
Session.set('selected-vehicle', this._id); // or however you id the docs in your app.
}
});
then create an event helper that gets the selected doc and returns it to the template.
Template.vehicles.helpers({
getSelectedVehicle: function() {
var selectedId = Session.get('selected-vehicle');
return cars.findOne(selectedId);
},
});
Session is a great and simple tool to manage user state, like what vehicle they have selected.
Finally, you would then need to get the values in your template somewhere
<!-- html-->
{{#if getSelectedVehicle}}
{{#with getSelectedVehicle}}
<!-- mark up, when using with you can access doc atts directly. -->
{{/with}}
{{else}}
<!-- tell the user to make a selection -->
{{/if}}
using with in this context can lead to more readable markup. But there are other ways to achieve the same result.
To recap, at a high level, You are targeting the users interactions with the UI, to set a global variable as a way to simplify managing state. Be sure to check out Session in the meteor docs, its very simple and powerful. (the above code is not tested, but hopefully conveys the idea)

No data send with socket.io

I have to send data using socket.io.when a user enter his login and a password,he will be redirect to index.ejs and the username will be send to the server.
route.js (I mentioned only the part of the script not the hole script to show that when the login and password are correct a user get an index page and the userobject send to the index):
var index = function(req, res, next) {
if(!req.isAuthenticated()) {
res.redirect('/signin');
} else {
var user = req.user;
if(user !== undefined) {
user = user.toJSON();
}
res.render('index', {title: 'Home', user: user});
}
};
app.js:
io.sockets.on('connection', function (socket) {
socket.on("new_user",function(user1){
console.log("a new user is connected",user1);
var current_date=new Date();
var date=current_date.toString();
ex.user_connect(user1,date);
});
});
index.ejs:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width ,initial-scale=1.0" />
<title><%= title %></title>
<link rel="stylesheet" href="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="style/style.css"/>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="js/bootstrap.js"></script>
</head>
<body>
<nav class="navbar navbar-inverse">
<div class="container-fluid">
<div class="navbar-header">
<a class="navbar-brand" href="/">HomePage</a>
</div>
<div>
<ul class="nav navbar-nav navbar-right">
<li><%= user.username%></li>
<li><span class="glyphicon glyphicon-log-out"></span> Sign out</li>
</ul>
</div>
</div>
</nav>
<div class="container">
<div class="jumbotron">
<div class="row">
<div class="col-sm-6">
<div class="container">
<h2>Led1</h2>
<!-- Trigger the modal with a button -->
<button type="button" class="btn btn-default btn-lg" id="led1" align="center">check it</button>
<!-- Modal -->
<div class="modal fade" id="model_led1" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header" style="padding:35px 50px;">
<button type="button" class="close" data-dismiss="modal" id="close">×</button>
<h4><span class="glyphicon glyphicon-lock"></span> Settings</h4>
</div>
<div class="modal-body" style="padding:40px 50px;">
<form role="form">
<img src="style/images/led.png" id="led" class="img-responsive"/>
<button type="button" class="btn btn-success btn-block" id="led1_activ"><span class="glyphicon glyphicon-off"></span> Activate</button>
<button type="button" class="btn btn-success btn-block" id="led1_desactiv"><span class="glyphicon glyphicon-off"></span> Desactivate</button>
</form>
</div>
<div class="modal-footer">
<button type="submit" class="btn btn-danger btn-default pull-left" data-dismiss="modal" id="cancel_button"><span class="glyphicon glyphicon-remove"></span> Cancel</button>
</div>
</div>
</div>
</div>
</div>
</div>
<script src="/socket.io/socket.io.js"></script>
<script>
var socket = io.connect('http://localhost:3000');
var user1 = user.username;
socket.emit('new_user',user1);
</script>
NB:I got the username on the navbar but I don't get it on the server console.
Ejs render all template variables in server and then return plain html to the client , so
Inside your script , do you have variable global user initialized? :
var user1 = user.username // var user = {username:"foo":} ,something like that before.
If you trying to get user from template variable you could try:
var user1= "<%= user.username%>";
This will render <%= user.username%> inside script tag before send to the client ( browser)

Resources