Logging into website
Hey guys! Today we will learn how to log in using a Obyte wallet, and also make paid access to the article. To do this, we need project that i have prepared for you Tutorial-2-source. Install it.
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git clone https://github.com/xJeneKx/Tutorial-2-source
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cd Tutorial-2-source
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npm install
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If you run project you will see a blog with articles. After opening any article you will see a request to log in. Let’s create an authorization. First we need a pairing code, you could see it on startup
Copy it and change our code a bit
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pairingCode = 'Aly99HdWoCFaxJiIHs1ldREAN/[email protected]/bb#' + code;
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eventBus.on('paired', (from_address, pairing_secret) => {
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console.error('paired', from_address, pairing_secret);
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});
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Run and see the link. Сlick on it and bot will be added. Now let’s look at the console.
Add the link
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b = '<br>Please login using this pairing code: <a href="obyte:' + pairingCode + '">' + pairingCode + '</a>';
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And QR
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let dataURL = await QRCode.toDataURL("obyte:" + pairingCode);
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b = '<br>Please login using this pairing code: <a href="obyte:' + pairingCode + '">' + pairingCode + '</a><br><img src="' + dataURL + '">';
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Save our device address, we will need it later.
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eventBus.on('paired', (from_address, pairing_secret) => {
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let device = require('ocore/device');
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assocCodeToDeviceAddress[pairing_secret] = from_address;
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device.sendMessageToDevice(from_address, 'text', 'ok');
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});
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Now we need to tell the browser that we are logged in
To implement this, we add function in start.js
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async function amILogged(ctx) {
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let url = ctx.request.url;
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let match = url.match(/code=([0-9]+)/);
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if (match && assocCodeToDeviceAddress[match[1]]) {
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ctx.cookies.set('ac', match[1]);
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ctx.body = 'true';
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} else {
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ctx.body = 'false';
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}
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}
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And also one more routing
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app.use(mount('/amilogged', amILogged));
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In article.html we will add a request to check
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var step = '<%= step %>';
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var code = '<%= code %>';
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if (step === 'login') {
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setInterval(() => {
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fetch('/amilogged?code=' + code)
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.then((response) => {
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return response.text();
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}).then(result => {
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if (result === 'true') {
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location.reload(true);
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}
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})
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.catch(alert);
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}, 5000);
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}
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What’s going on here? The user scans the QR code, adds our bot. Bot associates code with his device_address. In the browser, we knock and ask: did we logged in? and adding cookies.
Now we need to create an address and associate it with the user and the article.
Add a variable
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let assocCodeAndNumberToAddress = {};
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Add the address and display it
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step = 'paid';
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let address = await getAssocAddress(assocCode, 1);
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let dataURL = await QRCode.toDataURL("obyte:" + address + '?amount=100');
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b = '<br>Please pay for the article. <br>Address: ' + address + '<br>Amount: 100<br><img src="' + dataURL + '"><br>' +
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'<a href="obyte:' + address + '?amount=100">Pay</a>';
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And finally the function getAssocAddress
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function getAssocAddress(assocCode, number) {
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return new Promise(resolve => {
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let name = assocCode + '_' + number;
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if (assocCodeAndNumberToAddress[name]) {
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return resolve(assocCodeAndNumberToAddress[name]);
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} else {
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headlessWallet.issueNextMainAddress(address => {
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assocCodeAndNumberToAddress[name] = address;
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return resolve(address);
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});
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}
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});
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}
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This time we will not wait for the stabilization of the unit and immediately open access.
Add a variable
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let assocCodeToPaid = {};
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Add a check that the user has paid for
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async function amIPaid(ctx) {
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let code = ctx.cookies.get('ac');
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ctx.body = (code && itPaid(code)) ? 'true' : 'false';
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}
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​
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function itPaid(code) {
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return !!assocCodeToPaid[code];
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}
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Add a routing
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app.use(mount('/amipaid', amIPaid));
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And payment processing
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eventBus.on('new_my_transactions', (arrUnits) => {
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const device = require('ocore/device.js');
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db.query("SELECT address, amount, asset FROM outputs WHERE unit IN (?)", [arrUnits], rows => {
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rows.forEach(row => {
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if (row.amount === 100 && row.asset === null) {
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for (let key in assocCodeAndNumberToAddress) {
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if (assocCodeAndNumberToAddress[key] === row.address) {
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let assocCode = key.split('_')[0];
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assocCodeToPaid[assocCode] = true;
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device.sendMessageToDevice(assocCodeToDeviceAddress[assocCode], 'text', 'I received your payment');
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return;
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}
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}
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}
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})
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});
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});
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That’s all, make a working second article - will be your homework:) You should get this:
https://www.youtube.com/watch?v=vvB6A1wBecQ​
Last modified 25d ago
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