├── .gitignore
├── README.md
├── build.sh
├── composer.json
├── composer.lock
├── css
    ├── complete.css
    └── payment.css
├── img
    └── loader.gif
├── release.sh
├── templates
    ├── completed.php
    └── payment.php
└── woocommerce-gateway-lightning.php


/.gitignore:
--------------------------------------------------------------------------------
1 | vendor
2 | .vimrc
3 | woocommerce-gateway-lightning.zip
4 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # WooCommerce Gateway Plugin for Lightning
 2 | 
 3 | Gateway plugin to accept Lightning payments at [WooCommerce](https://woocommerce.com) stores,
 4 | based on [Lightning Charge](https://github.com/ElementsProject/lightning-charge).
 5 | 
 6 | ## Installation
 7 | 
 8 | Requires PHP >= 5.6 and the `php-curl` and `php-gd` extensions.
 9 | 
10 | 1. Setup [Lightning Charge](https://github.com/ElementsProject/lightning-charge).
11 | 
12 | 2. [Download woocommerce-gateway-lightning.zip](https://github.com/ElementsProject/woocommerce-gateway-lightning/releases/download/v0.2.7/woocommerce-gateway-lightning.zip)
13 | 
14 | 3. Install and enable the plugin on your WordPress installation.
15 | 
16 | 4. Under the WordPress administration panel, go to `WooCommerce -> Settings -> Checkout -> Lightning` to configure your Lightning Charge server URL and API token.
17 | 
18 | That's it! The "Bitcoin Lightning" payment option should now be available in your checkout page.
19 | 
20 | ## Screenshots
21 | 
22 | <img src="https://i.imgur.com/Q67y5l2.png" width="45%"></img>
23 | <img src="https://i.imgur.com/958Bm64.png" width="45%"></img>
24 | <img src="https://i.imgur.com/QbWiks1.png" width="45%"></img>
25 | <a href="https://i.imgur.com/UBCdmLR.png"><img src="https://i.imgur.com/JgwuFSl.png" width="45%"></img></a>
26 | 
27 | ## License
28 | 
29 | MIT
30 | 


--------------------------------------------------------------------------------
/build.sh:
--------------------------------------------------------------------------------
1 | #!/bin/sh
2 | composer install --no-dev
3 | zip -r woocommerce-gateway-lightning.zip composer.json woocommerce-gateway-lightning.php vendor templates css img README.md --exclude='vendor/bacon/bacon-qr-code/tests/*'
4 | 
5 | 


--------------------------------------------------------------------------------
/composer.json:
--------------------------------------------------------------------------------
 1 | {
 2 |     "name": "elementsproject/woocommerce-gateway-lightning",
 3 |     "description": "WooCommerce Gateway Plugin for Lightning Charge",
 4 |     "version": "0.2.7",
 5 |     "license": "MIT",
 6 |     "minimum-stability": "dev",
 7 |     "require": {
 8 |         "bacon/bacon-qr-code": "^1.0",
 9 |         "elementsproject/lightning-charge-client-php": "^0.1.3"
10 |     }
11 | }
12 | 


--------------------------------------------------------------------------------
/composer.lock:
--------------------------------------------------------------------------------
  1 | {
  2 |     "_readme": [
  3 |         "This file locks the dependencies of your project to a known state",
  4 |         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
  5 |         "This file is @generated automatically"
  6 |     ],
  7 |     "hash": "b6a2854067c61917fde3f4ad286638f4",
  8 |     "content-hash": "f6ec27bba43744175813baa5f5b325da",
  9 |     "packages": [
 10 |         {
 11 |             "name": "bacon/bacon-qr-code",
 12 |             "version": "1.0.3",
 13 |             "source": {
 14 |                 "type": "git",
 15 |                 "url": "https://github.com/Bacon/BaconQrCode.git",
 16 |                 "reference": "5a91b62b9d37cee635bbf8d553f4546057250bee"
 17 |             },
 18 |             "dist": {
 19 |                 "type": "zip",
 20 |                 "url": "https://api.github.com/repos/Bacon/BaconQrCode/zipball/5a91b62b9d37cee635bbf8d553f4546057250bee",
 21 |                 "reference": "5a91b62b9d37cee635bbf8d553f4546057250bee",
 22 |                 "shasum": ""
 23 |             },
 24 |             "require": {
 25 |                 "ext-iconv": "*",
 26 |                 "php": "^5.4|^7.0"
 27 |             },
 28 |             "require-dev": {
 29 |                 "phpunit/phpunit": "^4.8"
 30 |             },
 31 |             "suggest": {
 32 |                 "ext-gd": "to generate QR code images"
 33 |             },
 34 |             "type": "library",
 35 |             "autoload": {
 36 |                 "psr-0": {
 37 |                     "BaconQrCode": "src/"
 38 |                 }
 39 |             },
 40 |             "notification-url": "https://packagist.org/downloads/",
 41 |             "license": [
 42 |                 "BSD-2-Clause"
 43 |             ],
 44 |             "authors": [
 45 |                 {
 46 |                     "name": "Ben Scholzen 'DASPRiD'",
 47 |                     "email": "mail@dasprids.de",
 48 |                     "homepage": "http://www.dasprids.de",
 49 |                     "role": "Developer"
 50 |                 }
 51 |             ],
 52 |             "description": "BaconQrCode is a QR code generator for PHP.",
 53 |             "homepage": "https://github.com/Bacon/BaconQrCode",
 54 |             "time": "2017-10-17 09:59:25"
 55 |         },
 56 |         {
 57 |             "name": "elementsproject/lightning-charge-client-php",
 58 |             "version": "0.1.3",
 59 |             "source": {
 60 |                 "type": "git",
 61 |                 "url": "https://github.com/ElementsProject/lightning-charge-client-php.git",
 62 |                 "reference": "1ee22161e90318296770135519cbdd624dcb796a"
 63 |             },
 64 |             "dist": {
 65 |                 "type": "zip",
 66 |                 "url": "https://api.github.com/repos/ElementsProject/lightning-charge-client-php/zipball/1ee22161e90318296770135519cbdd624dcb796a",
 67 |                 "reference": "1ee22161e90318296770135519cbdd624dcb796a",
 68 |                 "shasum": ""
 69 |             },
 70 |             "require": {
 71 |                 "tcdent/php-restclient": "^0.1"
 72 |             },
 73 |             "require-dev": {
 74 |                 "clue/phar-composer": "^1.0",
 75 |                 "phpunit/phpunit": "^6.4"
 76 |             },
 77 |             "type": "library",
 78 |             "autoload": {
 79 |                 "files": [
 80 |                     "client.php"
 81 |                 ]
 82 |             },
 83 |             "notification-url": "https://packagist.org/downloads/",
 84 |             "license": [
 85 |                 "MIT"
 86 |             ],
 87 |             "description": "PHP client for the Lightning Charge REST API",
 88 |             "time": "2017-12-29 19:18:18"
 89 |         },
 90 |         {
 91 |             "name": "tcdent/php-restclient",
 92 |             "version": "0.1.7",
 93 |             "source": {
 94 |                 "type": "git",
 95 |                 "url": "https://github.com/tcdent/php-restclient.git",
 96 |                 "reference": "4522e8518eaef770d715977fcb45f187f8ad7499"
 97 |             },
 98 |             "dist": {
 99 |                 "type": "zip",
100 |                 "url": "https://api.github.com/repos/tcdent/php-restclient/zipball/4522e8518eaef770d715977fcb45f187f8ad7499",
101 |                 "reference": "4522e8518eaef770d715977fcb45f187f8ad7499",
102 |                 "shasum": ""
103 |             },
104 |             "require": {
105 |                 "ext-curl": "*",
106 |                 "ext-json": "*",
107 |                 "php": ">=5.4.0"
108 |             },
109 |             "require-dev": {
110 |                 "php": ">=5.5.7",
111 |                 "phpunit/phpunit": ">=4.5"
112 |             },
113 |             "type": "library",
114 |             "autoload": {
115 |                 "files": [
116 |                     "restclient.php"
117 |                 ]
118 |             },
119 |             "notification-url": "https://packagist.org/downloads/",
120 |             "license": [
121 |                 "MIT"
122 |             ],
123 |             "authors": [
124 |                 {
125 |                     "name": "Travis Dent",
126 |                     "email": "tcdent@gmail.com",
127 |                     "role": "Developer"
128 |                 }
129 |             ],
130 |             "description": "A generic REST API client for PHP",
131 |             "homepage": "http://github.com/tcdent/php-restclient",
132 |             "keywords": [
133 |                 "api",
134 |                 "client",
135 |                 "curl",
136 |                 "json",
137 |                 "rest",
138 |                 "xml"
139 |             ],
140 |             "time": "2017-09-07 20:44:36"
141 |         }
142 |     ],
143 |     "packages-dev": [],
144 |     "aliases": [],
145 |     "minimum-stability": "dev",
146 |     "stability-flags": [],
147 |     "prefer-stable": false,
148 |     "prefer-lowest": false,
149 |     "platform": [],
150 |     "platform-dev": []
151 | }
152 | 


--------------------------------------------------------------------------------
/css/complete.css:
--------------------------------------------------------------------------------
1 | .woocommerce-order .order_details .payreq {
2 |   word-wrap: break-word;
3 | }
4 | 


--------------------------------------------------------------------------------
/css/payment.css:
--------------------------------------------------------------------------------
 1 | /* Hide WooCommerce default title payment details */
 2 | header.entry-header, .order_details {
 3 |   display: none;
 4 | }
 5 | 
 6 | .woocommerce-breadcrumb {
 7 |   margin-bottom: 0;
 8 | }
 9 | 
10 | .ln-pay { margin-bottom: 2em; }
11 | 
12 | .ln-pay h2 { margin-bottom: 0; }
13 | 
14 | .ln-pay h4 {
15 |   color: #999;
16 |   clear: none;
17 | }
18 | 
19 | .ln-pay .qr {
20 |   display: block;
21 |   float: right;
22 |   width: 200px;
23 |   margin-top: -10px;
24 | }
25 | 
26 | .ln-pay .payreq {
27 |   word-wrap: break-word;
28 |   margin-right: 220px;
29 | }
30 | 
31 | .ln-pay code {
32 |   display: block;
33 |   margin: 1em 0;
34 |   padding: 0.75em;
35 | }
36 | 
37 | .ln-pay p {
38 |   margin: 1em 0;
39 | }
40 | 
41 | .ln-pay .loader {
42 |   display: inline;
43 | }
44 | 
45 | @media (max-width: 550px) {
46 |   .ln-pay { text-align: center; }
47 |   .ln-pay .qr { float: none; margin: 0 auto; }
48 |   .ln-pay .payreq { margin-right: 0; }
49 | }
50 | 


--------------------------------------------------------------------------------
/img/loader.gif:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ElementsProject/woocommerce-gateway-lightning/068d5e7cd9415715bc2878f7c2cd0e41f681ff02/img/loader.gif


--------------------------------------------------------------------------------
/release.sh:
--------------------------------------------------------------------------------
 1 | #!/bin/bash
 2 | 
 3 | set -eo pipefail
 4 | set -x
 5 | 
 6 | [ -z "$1" ] && { echo >&2 version required; exit 1; }
 7 | 
 8 | sed -i 's!"version": ".*"!"version": "'"$1"'"!' composer.json
 9 | sed -ri "s!Version:( *).*!Version:\\1$1!" woocommerce-gateway-lightning.php
10 | sed -ri s!download/v[^/]+/woocommerce-gateway-lightning.zip!download/v$1/woocommerce-gateway-lightning.zip! README.md
11 | 
12 | composer update
13 | 
14 | ./build.sh
15 | 
16 | read -p "Release v$1 ready, press Enter to publish"
17 | 
18 | git add README.md composer.json composer.lock woocommerce-gateway-lightning.php
19 | git commit -m v$1 && git tag v$1
20 | git push && git push --tags
21 | 
22 | echo Attach zip file: https://github.com/ElementsProject/woocommerce-gateway-lightning/releases/edit/v$1
23 | 


--------------------------------------------------------------------------------
/templates/completed.php:
--------------------------------------------------------------------------------
 1 | <link rel="stylesheet" href="<?php echo plugins_url('css/completed.css', dirname(__FILE__))?>" type="text/css">
 2 | 
 3 | <h2>Payment completed successfully</h2>
 4 | <ul class="order_details">
 5 |   <li>
 6 |     Payment completed at: <strong><?php echo date('r', $invoice->paid_at) ?></strong>
 7 |   </li>
 8 |   <li>
 9 |     Lightning rhash: <strong><?php echo $invoice->rhash ?></strong>
10 |   </li>
11 |   <li>
12 |     Invoice amount: <strong><?php echo self::format_msat($invoice->msatoshi) ?></strong>
13 |   </li>
14 |   <li>
15 |     Payment request: <strong class="payreq"><?php echo $invoice->payreq ?></strong>
16 |   </li>
17 | </ul>
18 | 


--------------------------------------------------------------------------------
/templates/payment.php:
--------------------------------------------------------------------------------
 1 | <link rel="stylesheet" href="<?php echo plugins_url('css/payment.css', dirname(__FILE__))?>" type="text/css">
 2 | <noscript><style>.yesscript{display:none}</style></noscript>
 3 | 
 4 | <?php $expiry_datestr = date('r', $invoice->expires_at); ?>
 5 | 
 6 | <div class="ln-pay">
 7 |   <h1>Pay with Lightning</h1>
 8 |   <h3>
 9 |     <?php if ($order->get_currency() !== 'BTC'): ?> <?php echo $order->get_total() ?> <?php echo $order->get_currency() ?> = <?php endif ?>
10 |     <?php echo self::format_msat($invoice->msatoshi) ?>
11 |   </h3>
12 |   <img class="qr" src="<?php echo $qr_uri ?>">
13 |   <code class="payreq"><?php echo $invoice->payreq ?></code>
14 |   <p>
15 |     <noscript>Your browser has JavaScript turned off. Please refresh the page manually after making the payment.</noscript>
16 |     <span class="yesscript"><img src="<?php echo plugins_url( '../img/loader.gif', __FILE__ ) ?>" class="loader" alt="loading"> Awaiting payment.</span>
17 |     The invoice expires <span id="expiry-timer" title="<?php echo $expiry_datestr ?>"><?php echo $expiry_datestr ?></span>.
18 |   </p>
19 |   <a class="checkout-button button alt btn btn-default" href="lightning:<?php echo $invoice->payreq ?>">Pay with Lightning</a>
20 | </div>
21 | 
22 | <script>
23 | (function($, ajax_url, invoice_id, redir_url, expires_at){
24 |   $(function poll() {
25 |     $.post(ajax_url, { action: 'ln_wait_invoice', invoice_id: invoice_id })
26 |       .success((code, state, res) => {
27 |         if (res.responseJSON === true) return document.location = redir_url
28 | 
29 |         setTimeout(poll, 10000);
30 |         throw new Error('succesful response, but not the expected one')
31 |       })
32 |       .fail(res => {
33 |         // 402 Payment Required: timeout reached without payment, invoice is still payable
34 |         if (res.status === 402) return poll()
35 |         // 410 Gone: invoice expired and can not longer be paid
36 |         if (res.status === 410) return location.reload()
37 | 
38 |         // for unknown errors, wait for a little while, then try again
39 |         setTimeout(poll, 10000);
40 |         throw new Error('unexpected status code '+res.status)
41 |       })
42 |   })
43 | 
44 |   ;(function updateExpiry() {
45 |     var left = expires_at - (+new Date()/1000|0)
46 |     if (left <= 0) return location.reload()
47 |     $('#expiry-timer').text('in '+formatDur(left))
48 |     setTimeout(updateExpiry, 1000)
49 |   })()
50 | 
51 |   function formatDur(x) {
52 |     var h=x/3600|0, m=x%3600/60|0, s=x%60
53 |     return ''+(h>0?h+':':'')+(m<10&&h>0?'0':'')+m+':'+(s<10?'0':'')+s
54 |   }
55 | })(jQuery, <?php echo json_encode(admin_url( 'admin-ajax.php' )) ?>, <?php echo json_encode($invoice->id) ?>,
56 |            <?php echo json_encode($order->get_checkout_order_received_url()) ?>, <?php echo $invoice->expires_at ?>)
57 | 
58 | </script>
59 | 
60 | 


--------------------------------------------------------------------------------
/woocommerce-gateway-lightning.php:
--------------------------------------------------------------------------------
  1 | <?php
  2 | /*
  3 |     Plugin Name: WooCommerce Lightning Gateway
  4 |     Plugin URI:  https://github.com/ElementsProject/woocommerce-gateway-lightning
  5 |     Description: Enable your WooCommerce store to accept Bitcoin Lightning payments.
  6 |     Author:      Blockstream
  7 |     Author URI:  https://blockstream.com
  8 | 
  9 |     Version:           0.2.7
 10 |     GitHub Plugin URI: https://github.com/ElementsProject/woocommerce-gateway-lightning
 11 | */
 12 | 
 13 | if ( ! defined( 'ABSPATH' ) ) {
 14 |   exit;
 15 | }
 16 | 
 17 | register_activation_hook( __FILE__, function(){
 18 |   if (!extension_loaded('gd') || !extension_loaded('curl')) {
 19 |     die('The php-curl and php-gd extensions are required. Please contact your hosting provider for additional help.');
 20 |   }
 21 | });
 22 | 
 23 | require_once 'vendor/autoload.php';
 24 | 
 25 | define('LIGHTNING_HOOK_KEY', hash_hmac('sha256', 'lightning-hook-token', AUTH_KEY));
 26 | define('LIGHTNING_LONGPOLL_TIMEOUT', min(120, max(5, ini_get('max_execution_time') * 0.8)));
 27 | 
 28 | if (!function_exists('init_wc_lightning')) {
 29 | 
 30 |   function init_wc_lightning() {
 31 |     if (!class_exists('WC_Payment_Gateway')) return;
 32 | 
 33 |     class WC_Gateway_Lightning extends WC_Payment_Gateway {
 34 | 
 35 |       public function __construct() {
 36 |         $this->id                 = 'lightning';
 37 |         $this->order_button_text  = __('Proceed to Lightning Payment', 'woocommerce');
 38 |         $this->method_title       = __('Lightning', 'woocommerce');
 39 |         $this->method_description = __('Lightning Network Payment');
 40 |         //$this->icon               = plugin_dir_url(__FILE__).'assets/img/icon.png';
 41 |         $this->supports           = array();
 42 | 
 43 |         // Load the settings.
 44 |         $this->init_form_fields();
 45 |         $this->init_settings();
 46 | 
 47 |         // Define user set variables.
 48 |         $this->title       = $this->get_option('title');
 49 |         $this->description = $this->get_option('description');
 50 | 
 51 |         // Lightning Charge REST client
 52 |         $this->charge = new LightningChargeClient($this->get_option('charge_url', 'http://localhost:9112'), $this->get_option('charge_token'));
 53 | 
 54 |         add_action('woocommerce_payment_gateways', array($this, 'register_gateway'));
 55 |         add_action('woocommerce_update_options_payment_gateways_lightning', array($this, 'process_admin_options'));
 56 |         add_action('woocommerce_api_wc_gateway_lightning', array($this, 'webhook_callback'));
 57 |         add_action('woocommerce_receipt_lightning', array($this, 'show_payment_info'));
 58 |         add_action('woocommerce_thankyou_lightning', array($this, 'show_payment_info'));
 59 |         add_action('wp_ajax_ln_wait_invoice', array($this, 'wait_invoice'));
 60 |         add_action('wp_ajax_nopriv_ln_wait_invoice', array($this, 'wait_invoice'));
 61 |       }
 62 | 
 63 |       /**
 64 |        * Initialise Gateway Settings Form Fields.
 65 |        */
 66 |       public function init_form_fields() {
 67 |         $this->form_fields = array(
 68 |           'enabled' => array(
 69 |             'title'       => __( 'Enable/Disable', 'woocommerce-gateway-lightning' ),
 70 |             'label'       => __( 'Enable Lightning payments', 'woocommerce-gateway-lightning' ),
 71 |             'type'        => 'checkbox',
 72 |             'description' => '',
 73 |             'default'     => 'no',
 74 |           ),
 75 |           'title' => array(
 76 |             'title'       => __('Title', 'lightning'),
 77 |             'type'        => 'text',
 78 |             'description' => __('Controls the name of this payment method as displayed to the customer during checkout.', 'lightning'),
 79 |             'default'     => __('Bitcoin Lightning', 'lightning'),
 80 |             'desc_tip'    => true,
 81 |            ),
 82 |           'charge_url' => array (
 83 |             'title'       => __('Lightning Charge server', 'lightning'),
 84 |             'type'        => 'text',
 85 |             'description' => __('URL of the Lightning Charge REST server to connect to.', 'lightning'),
 86 |             'default'     => __('http://localhost:9112', 'lightning'),
 87 |             'desc_tip'    => true,
 88 |           ),
 89 |           'charge_token' => array (
 90 |             'title'       => __('Lightning Charge API token', 'lightning'),
 91 |             'type'        => 'text',
 92 |             'description' => __('API access token configured in the Lightning Charge server.', 'lightning'),
 93 |             'desc_tip'    => true,
 94 |           ),
 95 |           'description' => array(
 96 |             'title'       => __('Customer Message', 'lightning'),
 97 |             'type'        => 'textarea',
 98 |             'description' => __('Message to explain how the customer will be paying for the purchase.', 'lightning'),
 99 |             'default'     => 'You will pay using the Lightning Network.',
100 |             'desc_tip'    => true,
101 |           ),
102 |           'invoice_expiry' => array(
103 |             'title'       => __('Invoice Expiry', 'lightning'),
104 |             'type'        => 'text',
105 |             'description' => __('Time til an invoice expires. Examples: 2w (2 weeks), 1m (1 month), 3h (3 hours), 3600s (3600 seconds). Defaults to 2h.', 'lightning'),
106 |             'default'     => '2h',
107 |             'desc_tip'    => true,
108 |           ),
109 |         );
110 |       }
111 | 
112 |       /**
113 |        * Process the payment and return the result.
114 |        * @param  int $order_id
115 |        * @return array
116 |        */
117 |       public function process_payment( $order_id ) {
118 |         $order = wc_get_order($order_id);
119 |         $invoice = $order->get_meta('_lightning_invoice');
120 | 
121 |         if (!$invoice) {
122 |           $invoice = $this->charge->invoice([
123 |             'currency'    => $order->get_currency(),
124 |             'amount'      => $order->get_total(),
125 |             'description' => self::make_desc($order),
126 |             'expiry'      => $this->get_option('invoice_expiry', '2h'),
127 |             'metadata'    => [ 'source' => 'woocommerce-gateway', 'order_id' => $order->get_id(), 'url' => get_home_url() ],
128 |             'webhook'     => self::get_webhook_url($order->get_id())
129 |           ]);
130 |           $this->update_invoice($order, $invoice);
131 | 
132 |           $order->add_order_note(sprintf(__('Lightning Charge invoice created, id=%s, rhash=%s.', 'lightning'), $invoice->id, $invoice->rhash));
133 |         }
134 | 
135 |         return array(
136 |           'result'   => 'success',
137 |           'redirect' => $order->get_checkout_payment_url(true)
138 |         );
139 |       }
140 | 
141 |       /**
142 |        * Process webhook callbacks.
143 |        */
144 |       public function webhook_callback() {
145 |         if (!self::verify_token($_GET['order'], $_GET['token'])) wp_die('invalid token');
146 | 
147 |         $order = wc_get_order($_GET['order']);
148 |         $invoice = json_decode(file_get_contents("php://input"));
149 | 
150 |         if (!$invoice) {
151 |           status_header(400);
152 |           wp_die('cannot decode request body invoice');
153 |         }
154 | 
155 |         $order->add_order_note(__('Lightning webhook notification received.', 'lightning'));
156 |         $this->update_invoice($order, $invoice);
157 |       }
158 | 
159 |       /**
160 |        * JSON endpoint for long polling payment updates.
161 |        */
162 |       public function wait_invoice() {
163 |         $paid_inv = $this->charge->wait($_POST['invoice_id'], LIGHTNING_LONGPOLL_TIMEOUT);
164 | 
165 |         if ($paid_inv) {
166 |           $order = wc_get_order($paid_inv->metadata->order_id);
167 |           $this->update_invoice($order, $paid_inv);
168 |           wp_send_json(true);
169 |         } else {
170 |           status_header($paid_inv === false ? 410 : 402);
171 |           wp_send_json(false);
172 |         }
173 |       }
174 | 
175 |       /**
176 |        * Hooks into the checkout page to display Lightning-related payment info.
177 |        */
178 |       public function show_payment_info($order_id) {
179 |         global $wp;
180 | 
181 |         $order = wc_get_order($order_id);
182 | 
183 |         if (!empty($wp->query_vars['order-received']) && $order->needs_payment()) {
184 |           // thankyou page requested, but order is still unpaid
185 |           wp_redirect($order->get_checkout_payment_url(true));
186 |           exit;
187 |         }
188 | 
189 |         $invoice = $order->get_meta('_lightning_invoice');
190 |         if ($invoice->status == 'unpaid') {
191 |           $invoice = $this->charge->fetch($invoice->id);
192 |           $this->update_invoice($order, $invoice);
193 |         }
194 | 
195 |         if ($order->has_status('cancelled')) {
196 |           // invoice expired, reload page to display expiry message
197 |           wp_redirect($order->get_checkout_payment_url(true));
198 |           exit;
199 |         }
200 | 
201 |         if ($order->needs_payment()) {
202 |           $qr_uri = self::get_qr_uri($invoice);
203 |           require __DIR__.'/templates/payment.php';
204 |         } elseif ($order->has_status(array('processing', 'completed'))) {
205 |           require __DIR__.'/templates/completed.php';
206 |         }
207 |       }
208 | 
209 |       /**
210 |        * Register as a WooCommerce gateway.
211 |        */
212 |       public function register_gateway($methods) {
213 |         $methods[] = $this;
214 |         return $methods;
215 |       }
216 | 
217 |       protected function update_invoice($order, $invoice) {
218 |         $order->update_meta_data('_lightning_invoice', $invoice);
219 |         $order->update_meta_data('lightning_id', $invoice->id);
220 |         $order->update_meta_data('lightning_rhash', $invoice->rhash);
221 |         $order->update_meta_data('lightning_msatoshi', $invoice->msatoshi);
222 |         if ($invoice->status === 'paid') $order->update_meta_data('lightning_msatoshi_received', $invoice->msatoshi_received);
223 |         $order->save_meta_data();
224 | 
225 |         if ($invoice->status == 'paid' && $order->needs_payment()) {
226 |           $order->payment_complete($invoice->id);
227 |         } else if ($invoice->status == 'expired' && $order->has_status(array('pending', 'on-hold'))) {
228 |           $order->update_status('cancelled', 'Lightning invoice expired');
229 |         }
230 |       }
231 | 
232 |       protected static function make_token($order_id) {
233 |         return hash_hmac('sha256', $order_id, LIGHTNING_HOOK_KEY);
234 |       }
235 | 
236 |       protected static function verify_token($order_id, $token) {
237 |         return self::make_token($order_id) === $token;
238 |       }
239 | 
240 |       protected static function get_webhook_url($order_id) {
241 |         return add_query_arg(array('order' => $order_id, 'token' => self::make_token($order_id)),
242 |           WC()->api_request_url('WC_Gateway_Lightning'));
243 |       }
244 | 
245 |       protected static function get_qr_uri($invoice) {
246 |         $renderer = new \BaconQrCode\Renderer\Image\Png;
247 |         $renderer->setWidth(180);
248 |         $renderer->setHeight(180);
249 |         $renderer->setMargin(0);
250 |         $writer = new \BaconQrCode\Writer($renderer);
251 |         $image = $writer->writeString(strtoupper('lightning:' . $invoice->payreq));
252 |         return 'data:image/png;base64,' . base64_encode($image);
253 |       }
254 | 
255 |       protected static function make_desc($order) {
256 |         $total = $order->get_total() . ' ' .$order->get_currency();
257 |         $desc = get_bloginfo('name') . ': ' . $total . ' for ';
258 |         $products = $order->get_items();
259 |         for ($n=0; strlen($desc) < 100 && count($products); $n++) {
260 |           $product = array_shift($products);
261 |           if (count($products)) $desc .= $product['name'] . ' x ' . $product['qty'] . ', ';
262 |           else $desc = ($n ? substr($desc, 0, -2) . ' and ' : $desc) . $product['name'].' x '.$product['qty'];
263 |         }
264 |         if (count($products)) $desc = substr($desc, 0, -2) . ' and ' . count($products) . ' more items';
265 |         return $desc;
266 |       }
267 | 
268 |       protected static function format_msat($msat) {
269 |         return rtrim(rtrim(number_format($msat/100000000, 8), '0'), '.') . ' mBTC';
270 |       }
271 |     }
272 | 
273 |     new WC_Gateway_Lightning();
274 |   }
275 | 
276 |   add_action('plugins_loaded', 'init_wc_lightning');
277 | }
278 | 


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