https://coinspondent.de/wp-content/plugins/bitcoin-lightning-publisher/public/js/bln-publisher-public.js?ver=1

1document.addEventListener('DOMContentLoaded', function (event) {
2    (function () {
3        var checkPaidInterval = null;
4        var wp_rest_base_url = LN_Paywall.rest_base;
5        var LN_Paywall_Spinner =
6            '<svg class="LNP_spinner" viewBox="0 0 50 50"><circle class="LNP_path" cx="25" cy="25" r="20" fill="none" stroke-width="5"></circle></svg>';
7        var LN_Paywall_Copy =
8            '<svg xmlns="http://www.w3.org/2000/svg" class="LNP_copy" fill="none" viewBox="0 0 24 24" stroke-width="1.5" stroke="currentColor"><path class="LNP_path" stroke-linecap="round" stroke-linejoin="round" d="M15.75 17.25v3.375c0 .621-.504 1.125-1.125 1.125h-9.75a1.125 1.125 0 01-1.125-1.125V7.875c0-.621.504-1.125 1.125-1.125H6.75a9.06 9.06 0 011.5.124m7.5 10.376h3.375c.621 0 1.125-.504 1.125-1.125V11.25c0-4.46-3.243-8.161-7.5-8.876a9.06 9.06 0 00-1.5-.124H9.375c-.621 0-1.125.504-1.125 1.125v3.5m7.5 10.375H9.375a1.125 1.125 0 01-1.125-1.125v-9.25m12 6.625v-1.875a3.375 3.375 0 00-3.375-3.375h-1.5a1.125 1.125 0 01-1.125-1.125v-1.5a3.375 3.375 0 00-3.375-3.375H9.75" /></svg>';
9
10        function pay(invoice, options) {
11            if (!window.webln) {
12                showQRCode(invoice, options);
13                return startWatchingForPayment(invoice);
14            }
15            return window.webln
16                .enable()
17                .then(function () {
18                    window.webln
19                        .sendPayment(invoice.payment_request)
20                        .then((response) => {
21                            window.LNP_CURRENT_PREIMAGE =
22                                response.preimage || response.payment_preimage;
23                        })
24                        .catch(function (e) {
25                            console.error(e);
26                            showQRCode(invoice, options);
27                        });
28                    return startWatchingForPayment(invoice);
29                })
30                .catch(function (err) {
31                    console.error(err);
32                    showQRCode(invoice, options);
33                    return startWatchingForPayment(invoice);
34                });
35        }
36
37        function startWatchingForPayment(invoice) {
38            stopWatchingForPayment();
39            return new Promise(function (resolve, reject) {
40                checkPaidInterval = setInterval(
41                    checkPaymentStatus(invoice, resolve),
42                    2500
43                );
44            });
45        }
46
47        function stopWatchingForPayment() {
48            window.LNP_CURRENT_PREIMAGE = null;
49            if (checkPaidInterval) {
50                clearTimeout(checkPaidInterval);
51                checkPaidInterval = null;
52            }
53        }
54
55        function checkPaymentStatus(invoice, callback) {
56            if (!invoice || !invoice.token) {
57                console.log('Ligthning invoice missing');
58                return;
59            }
60            return function () {
61                let body = {
62                    token: invoice.token,
63                    preimage: window.LNP_CURRENT_PREIMAGE,
64                    t: Date.now(),
65                };
66                fetch(wp_rest_base_url + '/paywall/verify', {
67                    method: 'POST',
68                    credentials: 'same-origin',
69                    cache: 'no-cache',
70                    body: JSON.stringify(body),
71                    headers: {
72                        'Content-Type': 'application/json',
73                    },
74                }).then(function (response) {
75                    if (response.ok) {
76                        response.json().then(function (content) {
77                            stopWatchingForPayment();
78                            callback(content, invoice);
79                        });
80                    }
81                });
82            };
83        }
84
85        function showQRCode(invoice, options) {
86            var button = options.target.querySelector('button.wp-lnp-btn');
87            button.outerHTML = `<div class="wp-lnp-qrcode">
88            <a href="lightning:${
89                invoice.payment_request
90            }">

90<img src="https://quickchart.io/chart?cht=qr&chs=200x200&chl=${
91              invoice.payment_request
92            }"></a>
93            <br />
94            <a href="lightning:${
95                invoice.payment_request
96            }">${invoice.payment_request.substr(
97                0,
98                36
99            )}...</a><span onClick="navigator.clipboard.writeText('${
100                invoice.payment_request
101            }');" class="wp-lnp-copy">${LN_Paywall_Copy}</span>
102            </div>`;
103        }
104
105        function requestPayment(params, options) {
106            return fetch(wp_rest_base_url + '/paywall/pay', {
107                method: 'POST',
108                credentials: 'same-origin',
109                cache: 'no-cache',
110                body: JSON.stringify(params),
111                headers: {
112                    'Content-Type': 'application/json',
113                },
114            })
115                .then(function (resp) {
116                    return resp.json();
117                })
118                .then(function (invoice) {
119                    if (!invoice || !invoice.payment_request) {
120                        console.error(
121                            'Failed to generate lightning invoice',
122                            invoice
123                        );
124                        throw new Error(
125                            'Failed to generate lightning invoice ' +
126                                JSON.stringify(invoice)
127                        );
128                    }
129                    return pay(invoice, options);
130                });
131        }
132
133        function initPostPaywalls() {
134            var buttons = [].slice.call(
135                document.querySelectorAll('.wp-lnp-btn')
136            );
137            if (buttons.length === 0) {
138                return;
139            }
140            buttons.forEach(function (button) {
141                button.addEventListener('click', function (e) {
142                    e.preventDefault();
143                    this.setAttribute('disabled', '');
144
145                    this.innerHTML = LN_Paywall_Spinner;
146                    var wrapper = this.closest('.wp-lnp-wrapper');
147
148                    requestPayment(
149                        { post_id: parseInt(window.LN_Paywall.post_id) },
150                        { target: wrapper }
151                    )
152                        .then(function (content, invoice) {
153                            wrapper.outerHTML = content;
154                        })
155                        .catch(function (e) {
156                            console.log(e);
157                            alert('sorry, something went wrong.');
158                        });
159                });
160            });
161        }
162
163        initPostPaywalls();
164    })();
165});