paivana

HTTP paywall reverse proxy
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paywall.en.must (49461B)


      1 <!DOCTYPE html>
      2 <html lang="en">
      3   <head>
      4     <title>Payment Required</title>
      5     <meta http-equiv="content-type" content="text/html;CHARSET=utf-8" />
      6     <meta charset="UTF-8" />
      7     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
      8     <meta name="taler-support" content="uri" />
      9     <script>
     10       const QR_WIDTH = 300;
     11       const QR_HEIGHT = 300;
     12       const I18N_PAYMENT_CONFIRMED_LOADING = 'Payment confirmed! Loading page...';
     13       const I18N_PAYMENT_CONFIRMED_PROBLEM = 'Payment confirmed, but something went wrong when we tried to obtain the access token. This is a bug, please contact the operator if the issue persists.';
     14       const I18N_PAYMENT_CONFIRMED_ERROR = 'Could not reach the server!';
     15       const I18N_PAYMENT_CONFIRMED_NO_ORDER = 'Unexpected 200 OK response without an order_id. Trying again.';
     16       const I18N_PAYMENT_NETWORK_PROBLEM = 'Network error! Retrying...';
     17       const MERCHANT_BACKEND = '{{ merchant_backend }}';
     18       const MERCHANT_TEMPLATE_ID = '{{ template_id }}';
     19       const MAX_PICKUP_DELAY = {{ max_pickup_delay }}; // in seconds
     20       const TEMPLATE_SUMMARY = '{{ summary }}';
     21       const TEMPLATE_CHOICES = '{{{ choices }}}';
     22       const POLL_WAIT_MS = 30000;
     23     </script>
     24     <script>
     25       const encTable = "0123456789ABCDEFGHJKMNPQRSTVWXYZ";
     26       function encodeCrock(data) {
     27         const dataBytes = new Uint8Array(data);
     28         let sb = "";
     29         const size = data.byteLength;
     30         let bitBuf = 0;
     31         let numBits = 0;
     32         let pos = 0;
     33         while (pos < size || numBits > 0) {
     34           if (pos < size && numBits < 5) {
     35             const d = dataBytes[pos++];
     36             bitBuf = (bitBuf << 8) | d;
     37             numBits += 8;
     38           }
     39           if (numBits < 5) {
     40             bitBuf = bitBuf << (5 - numBits);
     41             numBits = 5;
     42           }
     43           const v = (bitBuf >>> (numBits - 5)) & 31;
     44           sb += encTable[v];
     45           numBits -= 5;
     46         }
     47         return sb;
     48       }
     49       function timestampRoundedToBuffer(sec) {
     50         const b = new ArrayBuffer(8);
     51         const v = new DataView(b);
     52         const numVal = BigInt(sec) * 1000n * 1000n;
     53         // The buffer we sign over represents the timestamp in microseconds.
     54         if (typeof v.setBigUint64 !== "undefined") {
     55           v.setBigUint64(0, numVal);
     56         } else {
     57           const s = bigint(sec).multiply(1000 * 1000);
     58           const arr = s.toArray(2 ** 8).value;
     59           let offset = 8 - arr.length;
     60           for (let i = 0; i < arr.length; i++) {
     61             v.setUint8(offset++, arr[i]);
     62           }
     63         }
     64         return new Uint8Array(b);
     65       }
     66       function waitMs(ms) {
     67         return new Promise((resolve) => setTimeout(resolve, ms));
     68       }
     69       async function sha256b64(data) {
     70         const buf = await crypto.subtle.digest("SHA-256", data);
     71         return new Uint8Array(buf)
     72           .toBase64({ alphabet: "base64url" })
     73           .replace(/=+$/, "");
     74       }
     75       async function makePaivanaId(curTime, nonceBuf, website) {
     76         const websiteBuf = new TextEncoder().encode(`${website}\0`);
     77         const curTimeBuf = timestampRoundedToBuffer(curTime);
     78 
     79         const length = nonceBuf.length + websiteBuf.length + curTimeBuf.length;
     80         const buf = new Uint8Array(length);
     81         buf.set(nonceBuf, 0);
     82         buf.set(websiteBuf, nonceBuf.length);
     83         buf.set(curTimeBuf, nonceBuf.length + websiteBuf.length);
     84         const hash = await sha256b64(buf);
     85         return `${curTime}-${hash}`;
     86       }
     87       async function confirmPayment(order_id, linkEl, errorEl) {
     88         linkEl.textContent = I18N_PAYMENT_CONFIRMED_LOADING;
     89         linkEl.href = '#';
     90         try {
     91           const res = await fetch(`${origin}/.well-known/paivana`, {
     92             method:  'POST',
     93             headers: { 'Content-Type': 'application/json' },
     94             redirect: "manual",
     95             body:    JSON.stringify({ order_id, nonce, cur_time: { t_s: expTime }, website }),
     96           });
     97           if (res.status >= 400) {
     98             linkEl.textContent = I18N_PAYMENT_CONFIRMED_PROBLEM;
     99             errorEl.textContent = JSON.stringify(await res.json());
    100           }
    101           const dest = res.redirected ? res.url : website;
    102           await waitMs(400);
    103           location.href = dest;
    104         } catch (e) {
    105           console.warn('[paivana] Error trying to confirm payment:', e);
    106           errorEl.textContent = I18N_PAYMENT_CONFIRMED_ERROR;
    107         }
    108       }
    109 
    110       function toggleDescription(el) {
    111         for (const a of el.getElementsByClassName("arrow")) {
    112           a.classList.toggle("upside-down")
    113         }
    114         for (const a of el.getElementsByClassName("price-list")) {
    115           a.classList.toggle("hidden")
    116         }
    117       }
    118 
    119     </script>
    120     <script>
    121       async function main() {
    122         const website = atob(window.location.hash.substring(1));
    123         const origin = window.location.origin;
    124 
    125         // cap at 100 years, we don't deal well with 'forever' otherwise
    126         const usePickupDelay = Math.min(MAX_PICKUP_DELAY, 60*60*24*356*100);
    127 
    128         // Strip trailing slash so we can append /templateId cleanly.
    129         const merchantBase  = MERCHANT_BACKEND.replace(/\/$/, '');
    130         const merchantUrl   = new URL(merchantBase);
    131         const merchantProto = merchantUrl.protocol;
    132         const suffix        = merchantProto === 'http:' ? '+http' : '';
    133         const merchantHost  = merchantUrl.host;
    134         const merchantPath  = merchantUrl.path;
    135 
    136         const expTime  = Math.floor(Date.now() / 1000) + usePickupDelay;
    137         const nonceBuf = new Uint8Array(16);
    138         crypto.getRandomValues(nonceBuf);
    139         const nonce = encodeCrock(nonceBuf.buffer);
    140 
    141         const paivanaId = await makePaivanaId(expTime, nonceBuf, website);
    142 
    143         // finally we can compute the talerURI and polling URL
    144         const TALER_URI = [
    145           `taler${suffix}://pay-template/`,
    146           merchantHost,
    147           merchantPath,
    148           `/`,
    149           MERCHANT_TEMPLATE_ID,
    150           `?session_id=${encodeURIComponent(paivanaId)}`,
    151           `&fulfillment_url=${encodeURIComponent(website)}`
    152         ].join('');
    153 
    154         const PAIVANA_POLL_URL = [
    155           merchantBase,
    156           "/sessions/",
    157           encodeURIComponent(paivanaId),
    158           "?fulfillment_url=",
    159           encodeURIComponent(website),
    160           "&timeout_ms=",
    161           POLL_WAIT_MS
    162         ].join("");
    163 
    164 
    165         // grab all the html element we need
    166         const talerLink = document.getElementById('taler-link');
    167         const errorMessageLabel = document.getElementById('error-message');
    168         const qrDiv = document.getElementById('qrcode');
    169 
    170         // show the taler URI as a link
    171         // because we want the user to be able to use the webex
    172         talerLink.href        = TALER_URI;
    173 
    174         // show the qr code
    175         new QRCode(qrDiv, {
    176           text:         TALER_URI,
    177           width:        QR_WIDTH,
    178           height:       QR_HEIGHT,
    179           correctLevel: QRCode.CorrectLevel.M
    180         });
    181 
    182         // From here we just poll. Whe the request from polling
    183         // returns that the order has been paid we show to the 
    184         // proxy that we hold the nonce and it should return
    185         // us a valid cookie.
    186         while (true) {
    187           const start = performance.now();
    188           try {
    189             const res = await fetch(PAIVANA_POLL_URL, { cache: 'no-store' });
    190             if (res.status === 200) {
    191               let info = null;
    192               try   { info = await res.json() } catch (_) {}
    193               console.log("[paivana] Got reponse from backend", res, info);
    194               if (info.order_id) {
    195                 await confirmPayment(info.order_id, talerLink, errorMessageLabel);
    196               } else {
    197                 talerLink.textContent = I18N_PAYMENT_CONFIRMED_NO_ORDER;
    198                 await waitMs(3000);
    199                 location.href = website;
    200               }
    201               return;
    202             }
    203           } catch (e) {
    204             console.warn('[paivana] poll error:', e);
    205             talerLink.href = '#';
    206             talerLink.textContent = I18N_PAYMENT_NETWORK_PROBLEM;
    207           }
    208           const remMs = Math.round(POLL_WAIT_MS - (performance.now() - start));
    209           if (remMs > 0) await waitMs(remMs);
    210         }
    211         return;
    212       };
    213     </script>
    214     <style>
    215       *,
    216       *::before,
    217       *::after {
    218         box-sizing: border-box;
    219         margin: 0;
    220         padding: 0;
    221       }
    222 
    223       :root {
    224         --bg: rgb(226, 232, 240);
    225         --surface: white;
    226         --border: rgba(255, 255, 255, 0.07);
    227         --border-md: rgba(255, 255, 255, 0.13);
    228         --text: black;
    229         --muted: #7a7d8a;
    230         --primary: #0042b3;
    231         --primary-container: #d3deff;
    232         --on-primary-container: #00134a;
    233         --on-primary: #ffffff;
    234         --primary-dim: #7a7d8a;
    235         --radius-lg: 18px;
    236         --radius-md: 10px;
    237         --radius-sm: 7px;
    238       }
    239 
    240       body {
    241         font-family: sans-serif;
    242         background: var(--bg);
    243         color: var(--text);
    244         min-height: 100vh;
    245         display: flex;
    246         align-items: center;
    247         flex-direction: column;
    248       }
    249 
    250       .card {
    251         position: relative;
    252         z-index: 1;
    253         background: var(--surface);
    254         border: 1px solid var(--border-md);
    255         border-radius: var(--radius-lg);
    256         padding: 1rem;
    257         display: flex;
    258         flex-direction: column;
    259         align-items: center;
    260         gap: 1rem;
    261         box-shadow:
    262           0 0 0 1px rgba(0, 0, 0, 0.4),
    263           0 32px 80px rgba(0, 0, 0, 0.5);
    264       }
    265       .card-container {
    266         padding: 10px;
    267         width: 100%;
    268         max-width: 400px;
    269         margin: auto;
    270         margin-top: 0px;
    271       }
    272 
    273       /* compact header row */
    274       .header {
    275         display: flex;
    276         align-items: center;
    277         gap: 10px;
    278         width: 100%;
    279       }
    280       .lock-icon {
    281         width: 28px;
    282         height: 28px;
    283         flex-shrink: 0;
    284         opacity: 0.9;
    285       }
    286       .header-text h1 {
    287         font-size: 15px;
    288         font-weight: 500;
    289         color: var(--text);
    290         line-height: 1.2;
    291       }
    292       .header-text p {
    293         font-size: 12px;
    294         color: var(--muted);
    295         margin-top: 2px;
    296       }
    297 
    298       /* QR section */
    299       .qr-wrap {
    300         display: flex;
    301         flex-direction: column;
    302         align-items: center;
    303         gap: 10px;
    304       }
    305       .qr-frame {
    306         display: flex;
    307         align-items: center;
    308         justify-content: center;
    309       }
    310       .qr-frame svg {
    311         display: block;
    312       }
    313       .qr-taler-logo {
    314         position: absolute;
    315         top: 50%;
    316         left: 50%;
    317         transform: translate(-50%, -50%);
    318         align-content: center;
    319         display: flex;
    320         background-color: transparent;
    321       }
    322       .qr-taler-frame {
    323         max-width: 400px;
    324         margin: auto;
    325         padding: 10px;
    326         border-radius: 20px;
    327         background: conic-gradient(
    328             from var(--angle),
    329             #0042b3 0deg,
    330             #f1f1f4 20deg,
    331             #f1f1f4 150deg,
    332             #f1f1f4 160deg,
    333             #0042b3 180deg,
    334             #f1f1f4 200deg,
    335             #f1f1f4 330deg,
    336             #f1f1f4 340deg,
    337             #0042b3
    338           )
    339           padding-box;
    340         animation: 10s linear 0s infinite normal none running rotate;
    341         position: relative;
    342       }
    343       .qr-label {
    344         font-size: 11px;
    345         color: var(--muted);
    346         letter-spacing: 0.06em;
    347       }
    348       .qr-legend {
    349         text-align: center;
    350       }
    351 
    352       /* amount badge */
    353       .amount-badge {
    354         background: rgba(200, 241, 53, 0.08);
    355         border: 1px solid rgba(200, 241, 53, 0.2);
    356         border-radius: 99px;
    357         padding: 5px 14px;
    358         font-size: 13px;
    359         font-weight: 500;
    360         color: var(--primary);
    361         letter-spacing: 0.04em;
    362       }
    363       .merchant-host {
    364         font-size: small;
    365         color: gray;
    366       }
    367       .template-summary {
    368         text-align: center;
    369       }
    370       .pay-choices {
    371         cursor: pointer;
    372       }
    373       .upside-down {
    374         rotate: 180deg;
    375       }
    376       .hidden {
    377         display: none;
    378       }
    379 
    380       /* steps */
    381       .steps {
    382         width: 100%;
    383         display: flex;
    384         flex-direction: column;
    385         gap: 8px;
    386       }
    387       .step {
    388         display: flex;
    389         align-items: flex-start;
    390         gap: 11px;
    391         color: var(--on-primary-container);
    392         background: var(--primary-container);
    393         border: 1px solid var(--border);
    394         border-radius: var(--radius-md);
    395         padding: 11px 13px;
    396         transition: border-color 0.2s;
    397       }
    398       a.step {
    399         border: 1px solid var(--primary);
    400       }
    401       .step:hover {
    402         border-color: var(--border-md);
    403       }
    404       .step-num {
    405         width: 20px;
    406         height: 20px;
    407         border-radius: 50%;
    408         background: var(--primary-container);
    409         border: 1px solid var(--primary);
    410         color: var(--primary);
    411         font-size: 11px;
    412         font-weight: 500;
    413         display: flex;
    414         align-items: center;
    415         justify-content: center;
    416         flex-shrink: 0;
    417         margin-top: 1px;
    418       }
    419       .step-body {
    420       }
    421       .step-title {
    422         font-size: 18px;
    423         font-weight: 500;
    424         color: var(--text);
    425         margin-bottom: 2px;
    426         display: flex;
    427         justify-content: space-between;
    428       }
    429       .step-desc {
    430         font-size: 12px;
    431         color: var(--muted);
    432         line-height: 1.55;
    433       }
    434 
    435       /* cta button */
    436       .cta {
    437         padding-top: 13px;
    438         padding-bottom: 13px;
    439         padding-left: 26px;
    440         padding-right: 26px;
    441         border-radius: var(--radius-md);
    442         background: var(--primary);
    443         color: var(--on-primary);
    444         border: none;
    445         font-size: 20px;
    446         font-weight: 500;
    447         cursor: pointer;
    448         letter-spacing: 0.01em;
    449       }
    450       .cta:hover {
    451         background: var(--primary-dim);
    452       }
    453       .cta:active {
    454         transform: scale(0.98);
    455       }
    456       .button-cta {
    457         display: flex;
    458         margin: auto;
    459       }
    460 
    461       /* footer note */
    462       .footer-note {
    463         font-size: 11px;
    464         color: var(--muted);
    465         text-align: center;
    466         line-height: 1.6;
    467       }
    468       .footer-note a {
    469         color: var(--muted);
    470         text-decoration: underline;
    471         text-underline-offset: 2px;
    472       }
    473       .header {
    474         width: 100%;
    475         padding: 8px;
    476         margin-bottom: 10px;
    477         display: flex;
    478         background-color: white;
    479         border: 1px black solid;
    480       }
    481       .footer {
    482         position: fixed;
    483         bottom: 0;
    484         width: 100%;
    485         padding: 8px;
    486         display: flex;
    487         justify-content: center;
    488         background-color: white;
    489         border: 1px black solid;
    490         z-index: 2;
    491         flex-direction: column;
    492       }
    493       .footer p {
    494         text-wrap-mode: wrap;
    495       }
    496       body {
    497         margin-bottom: 60px;
    498       }
    499       svg.lock-icon {
    500         fill: var(--primary-container);
    501         stroke: var(--primary);
    502       }
    503       @property --angle {
    504         syntax: "<angle>";
    505         initial-value: 0deg;
    506         inherits: false;
    507       }
    508 
    509       @keyframes rotate {
    510         to {
    511           --angle: 360deg;
    512         }
    513       }
    514     </style>
    515     <!-- download from https://cdnjs.cloudflare.com/ajax/libs/qrcodejs/1.0.0/qrcode.min.js -->
    516     <script integrity="sha512-CNgIRecGo7nphbeZ04Sc13ka07paqdeTu0WR1IM4kNcpmBAUSHSQX0FslNhTDadL4O5SAGapGt4FodqL8My0mA==">
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this.moduleCount},make:function(){this.makeImpl(!1,this.getBestMaskPattern())},makeImpl:function(a,c){this.moduleCount=4*this.typeNumber+17,this.modules=new Array(this.moduleCount);for(var d=0;d<this.moduleCount;d++){this.modules[d]=new Array(this.moduleCount);for(var e=0;e<this.moduleCount;e++)this.modules[d][e]=null}this.setupPositionProbePattern(0,0),this.setupPositionProbePattern(this.moduleCount-7,0),this.setupPositionProbePattern(0,this.moduleCount-7),this.setupPositionAdjustPattern(),this.setupTimingPattern(),this.setupTypeInfo(a,c),this.typeNumber>=7&&this.setupTypeNumber(a),null==this.dataCache&&(this.dataCache=b.createData(this.typeNumber,this.errorCorrectLevel,this.dataList)),this.mapData(this.dataCache,c)},setupPositionProbePattern:function(a,b){for(var c=-1;7>=c;c++)if(!(-1>=a+c||this.moduleCount<=a+c))for(var 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g=-2;2>=g;g++)for(var h=-2;2>=h;h++)this.modules[d+g][e+h]=-2==g||2==g||-2==h||2==h||0==g&&0==h?!0:!1}},setupTypeNumber:function(a){for(var b=f.getBCHTypeNumber(this.typeNumber),c=0;18>c;c++){var d=!a&&1==(1&b>>c);this.modules[Math.floor(c/3)][c%3+this.moduleCount-8-3]=d}for(var c=0;18>c;c++){var d=!a&&1==(1&b>>c);this.modules[c%3+this.moduleCount-8-3][Math.floor(c/3)]=d}},setupTypeInfo:function(a,b){for(var c=this.errorCorrectLevel<<3|b,d=f.getBCHTypeInfo(c),e=0;15>e;e++){var g=!a&&1==(1&d>>e);6>e?this.modules[e][8]=g:8>e?this.modules[e+1][8]=g:this.modules[this.moduleCount-15+e][8]=g}for(var e=0;15>e;e++){var g=!a&&1==(1&d>>e);8>e?this.modules[8][this.moduleCount-e-1]=g:9>e?this.modules[8][15-e-1+1]=g:this.modules[8][15-e-1]=g}this.modules[this.moduleCount-8][8]=!a},mapData:function(a,b){for(var c=-1,d=this.moduleCount-1,e=7,g=0,h=this.moduleCount-1;h>0;h-=2)for(6==h&&h--;;){for(var i=0;2>i;i++)if(null==this.modules[d][h-i]){var j=!1;g<a.length&&(j=1==(1&a[g]>>>e));var k=f.getMask(b,d,h-i);k&&(j=!j),this.modules[d][h-i]=j,e--,-1==e&&(g++,e=7)}if(d+=c,0>d||this.moduleCount<=d){d-=c,c=-c;break}}}},b.PAD0=236,b.PAD1=17,b.createData=function(a,c,d){for(var e=j.getRSBlocks(a,c),g=new k,h=0;h<d.length;h++){var i=d[h];g.put(i.mode,4),g.put(i.getLength(),f.getLengthInBits(i.mode,a)),i.write(g)}for(var l=0,h=0;h<e.length;h++)l+=e[h].dataCount;if(g.getLengthInBits()>8*l)throw new Error("code length overflow. ("+g.getLengthInBits()+">"+8*l+")");for(g.getLengthInBits()+4<=8*l&&g.put(0,4);0!=g.getLengthInBits()%8;)g.putBit(!1);for(;;){if(g.getLengthInBits()>=8*l)break;if(g.put(b.PAD0,8),g.getLengthInBits()>=8*l)break;g.put(b.PAD1,8)}return b.createBytes(g,e)},b.createBytes=function(a,b){for(var c=0,d=0,e=0,g=new Array(b.length),h=new Array(b.length),j=0;j<b.length;j++){var k=b[j].dataCount,l=b[j].totalCount-k;d=Math.max(d,k),e=Math.max(e,l),g[j]=new Array(k);for(var m=0;m<g[j].length;m++)g[j][m]=255&a.buffer[m+c];c+=k;var n=f.getErrorCorrectPolynomial(l),o=new i(g[j],n.getLength()-1),p=o.mod(n);h[j]=new Array(n.getLength()-1);for(var m=0;m<h[j].length;m++){var q=m+p.getLength()-h[j].length;h[j][m]=q>=0?p.get(q):0}}for(var r=0,m=0;m<b.length;m++)r+=b[m].totalCount;for(var s=new Array(r),t=0,m=0;d>m;m++)for(var j=0;j<b.length;j++)m<g[j].length&&(s[t++]=g[j][m]);for(var m=0;e>m;m++)for(var j=0;j<b.length;j++)m<h[j].length&&(s[t++]=h[j][m]);return s};for(var c={MODE_NUMBER:1,MODE_ALPHA_NUM:2,MODE_8BIT_BYTE:4,MODE_KANJI:8},d={L:1,M:0,Q:3,H:2},e={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PATTERN111:7},f={PATTERN_POSITION_TABLE:[[],[6,18],[6,22],[6,26],[6,30],[6,34],[6,22,38],[6,24,42],[6,26,46],[6,28,50],[6,30,54],[6,32,58],[6,34,62],[6,26,46,66],[6,26,48,70],[6,26,50,74],[6,30,54,78],[6,30,56,82],[6,30,58,86],[6,34,62,90],[6,28,50,72,94],[6,26,50,74,98],[6,30,54,78,102],[6,28,54,80,106],[6,32,58,84,110],[6,30,58,86,114],[6,34,62,90,118],[6,26,50,74,98,122],[6,30,54,78,102,126],[6,26,52,78,104,130],[6,30,56,82,108,134],[6,34,60,86,112,138],[6,30,58,86,114,142],[6,34,62,90,118,146],[6,30,54,78,102,126,150],[6,24,50,76,102,128,154],[6,28,54,80,106,132,158],[6,32,58,84,110,136,162],[6,26,54,82,110,138,166],[6,30,58,86,114,142,170]],G15:1335,G18:7973,G15_MASK:21522,getBCHTypeInfo:function(a){for(var b=a<<10;f.getBCHDigit(b)-f.getBCHDigit(f.G15)>=0;)b^=f.G15<<f.getBCHDigit(b)-f.getBCHDigit(f.G15);return(a<<10|b)^f.G15_MASK},getBCHTypeNumber:function(a){for(var b=a<<12;f.getBCHDigit(b)-f.getBCHDigit(f.G18)>=0;)b^=f.G18<<f.getBCHDigit(b)-f.getBCHDigit(f.G18);return a<<12|b},getBCHDigit:function(a){for(var b=0;0!=a;)b++,a>>>=1;return b},getPatternPosition:function(a){return f.PATTERN_POSITION_TABLE[a-1]},getMask:function(a,b,c){switch(a){case e.PATTERN000:return 0==(b+c)%2;case e.PATTERN001:return 0==b%2;case e.PATTERN010:return 0==c%3;case e.PATTERN011:return 0==(b+c)%3;case e.PATTERN100:return 0==(Math.floor(b/2)+Math.floor(c/3))%2;case e.PATTERN101:return 0==b*c%2+b*c%3;case e.PATTERN110:return 0==(b*c%2+b*c%3)%2;case e.PATTERN111:return 0==(b*c%3+(b+c)%2)%2;default:throw new Error("bad maskPattern:"+a)}},getErrorCorrectPolynomial:function(a){for(var b=new i([1],0),c=0;a>c;c++)b=b.multiply(new i([1,g.gexp(c)],0));return b},getLengthInBits:function(a,b){if(b>=1&&10>b)switch(a){case c.MODE_NUMBER:return 10;case c.MODE_ALPHA_NUM:return 9;case c.MODE_8BIT_BYTE:return 8;case c.MODE_KANJI:return 8;default:throw new Error("mode:"+a)}else if(27>b)switch(a){case c.MODE_NUMBER:return 12;case c.MODE_ALPHA_NUM:return 11;case c.MODE_8BIT_BYTE:return 16;case c.MODE_KANJI:return 10;default:throw new Error("mode:"+a)}else{if(!(41>b))throw new Error("type:"+b);switch(a){case c.MODE_NUMBER:return 14;case c.MODE_ALPHA_NUM:return 13;case c.MODE_8BIT_BYTE:return 16;case c.MODE_KANJI:return 12;default:throw new Error("mode:"+a)}}},getLostPoint:function(a){for(var b=a.getModuleCount(),c=0,d=0;b>d;d++)for(var e=0;b>e;e++){for(var f=0,g=a.isDark(d,e),h=-1;1>=h;h++)if(!(0>d+h||d+h>=b))for(var i=-1;1>=i;i++)0>e+i||e+i>=b||(0!=h||0!=i)&&g==a.isDark(d+h,e+i)&&f++;f>5&&(c+=3+f-5)}for(var d=0;b-1>d;d++)for(var e=0;b-1>e;e++){var j=0;a.isDark(d,e)&&j++,a.isDark(d+1,e)&&j++,a.isDark(d,e+1)&&j++,a.isDark(d+1,e+1)&&j++,(0==j||4==j)&&(c+=3)}for(var d=0;b>d;d++)for(var e=0;b-6>e;e++)a.isDark(d,e)&&!a.isDark(d,e+1)&&a.isDark(d,e+2)&&a.isDark(d,e+3)&&a.isDark(d,e+4)&&!a.isDark(d,e+5)&&a.isDark(d,e+6)&&(c+=40);for(var e=0;b>e;e++)for(var d=0;b-6>d;d++)a.isDark(d,e)&&!a.isDark(d+1,e)&&a.isDark(d+2,e)&&a.isDark(d+3,e)&&a.isDark(d+4,e)&&!a.isDark(d+5,e)&&a.isDark(d+6,e)&&(c+=40);for(var k=0,e=0;b>e;e++)for(var d=0;b>d;d++)a.isDark(d,e)&&k++;var l=Math.abs(100*k/b/b-50)/5;return c+=10*l}},g={glog:function(a){if(1>a)throw new Error("glog("+a+")");return g.LOG_TABLE[a]},gexp:function(a){for(;0>a;)a+=255;for(;a>=256;)a-=255;return g.EXP_TABLE[a]},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)},h=0;8>h;h++)g.EXP_TABLE[h]=1<<h;for(var h=8;256>h;h++)g.EXP_TABLE[h]=g.EXP_TABLE[h-4]^g.EXP_TABLE[h-5]^g.EXP_TABLE[h-6]^g.EXP_TABLE[h-8];for(var h=0;255>h;h++)g.LOG_TABLE[g.EXP_TABLE[h]]=h;i.prototype={get:function(a){return this.num[a]},getLength:function(){return this.num.length},multiply:function(a){for(var b=new Array(this.getLength()+a.getLength()-1),c=0;c<this.getLength();c++)for(var d=0;d<a.getLength();d++)b[c+d]^=g.gexp(g.glog(this.get(c))+g.glog(a.get(d)));return new i(b,0)},mod:function(a){if(this.getLength()-a.getLength()<0)return this;for(var b=g.glog(this.get(0))-g.glog(a.get(0)),c=new Array(this.getLength()),d=0;d<this.getLength();d++)c[d]=this.get(d);for(var d=0;d<a.getLength();d++)c[d]^=g.gexp(g.glog(a.get(d))+b);return new i(c,0).mod(a)}},j.RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]],j.getRSBlocks=function(a,b){var c=j.getRsBlockTable(a,b);if(void 0==c)throw new Error("bad rs block @ typeNumber:"+a+"/errorCorrectLevel:"+b);for(var d=c.length/3,e=[],f=0;d>f;f++)for(var g=c[3*f+0],h=c[3*f+1],i=c[3*f+2],k=0;g>k;k++)e.push(new j(h,i));return e},j.getRsBlockTable=function(a,b){switch(b){case d.L:return j.RS_BLOCK_TABLE[4*(a-1)+0];case d.M:return j.RS_BLOCK_TABLE[4*(a-1)+1];case d.Q:return j.RS_BLOCK_TABLE[4*(a-1)+2];case d.H:return j.RS_BLOCK_TABLE[4*(a-1)+3];default:return void 0}},k.prototype={get:function(a){var b=Math.floor(a/8);return 1==(1&this.buffer[b]>>>7-a%8)},put:function(a,b){for(var c=0;b>c;c++)this.putBit(1==(1&a>>>b-c-1))},getLengthInBits:function(){return this.length},putBit:function(a){var b=Math.floor(this.length/8);this.buffer.length<=b&&this.buffer.push(0),a&&(this.buffer[b]|=128>>>this.length%8),this.length++}};var l=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]],o=function(){var a=function(a,b){this._el=a,this._htOption=b};return a.prototype.draw=function(a){function g(a,b){var c=document.createElementNS("http://www.w3.org/2000/svg",a);for(var d in b)b.hasOwnProperty(d)&&c.setAttribute(d,b[d]);return c}var b=this._htOption,c=this._el,d=a.getModuleCount();Math.floor(b.width/d),Math.floor(b.height/d),this.clear();var h=g("svg",{viewBox:"0 0 "+String(d)+" "+String(d),width:"100%",height:"100%",fill:b.colorLight});h.setAttributeNS("http://www.w3.org/2000/xmlns/","xmlns:xlink","http://www.w3.org/1999/xlink"),c.appendChild(h),h.appendChild(g("rect",{fill:b.colorDark,width:"1",height:"1",id:"template"}));for(var i=0;d>i;i++)for(var j=0;d>j;j++)if(a.isDark(i,j)){var k=g("use",{x:String(i),y:String(j)});k.setAttributeNS("http://www.w3.org/1999/xlink","href","#template"),h.appendChild(k)}},a.prototype.clear=function(){for(;this._el.hasChildNodes();)this._el.removeChild(this._el.lastChild)},a}(),p="svg"===document.documentElement.tagName.toLowerCase(),q=p?o:m()?function(){function a(){this._elImage.src=this._elCanvas.toDataURL("image/png"),this._elImage.style.display="block",this._elCanvas.style.display="none"}function d(a,b){var c=this;if(c._fFail=b,c._fSuccess=a,null===c._bSupportDataURI){var d=document.createElement("img"),e=function(){c._bSupportDataURI=!1,c._fFail&&_fFail.call(c)},f=function(){c._bSupportDataURI=!0,c._fSuccess&&c._fSuccess.call(c)};return d.onabort=e,d.onerror=e,d.onload=f,d.src="data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg==",void 0}c._bSupportDataURI===!0&&c._fSuccess?c._fSuccess.call(c):c._bSupportDataURI===!1&&c._fFail&&c._fFail.call(c)}if(this._android&&this._android<=2.1){var b=1/window.devicePixelRatio,c=CanvasRenderingContext2D.prototype.drawImage;CanvasRenderingContext2D.prototype.drawImage=function(a,d,e,f,g,h,i,j){if("nodeName"in a&&/img/i.test(a.nodeName))for(var l=arguments.length-1;l>=1;l--)arguments[l]=arguments[l]*b;else"undefined"==typeof j&&(arguments[1]*=b,arguments[2]*=b,arguments[3]*=b,arguments[4]*=b);c.apply(this,arguments)}}var e=function(a,b){this._bIsPainted=!1,this._android=n(),this._htOption=b,this._elCanvas=document.createElement("canvas"),this._elCanvas.width=b.width,this._elCanvas.height=b.height,a.appendChild(this._elCanvas),this._el=a,this._oContext=this._elCanvas.getContext("2d"),this._bIsPainted=!1,this._elImage=document.createElement("img"),this._elImage.style.display="none",this._el.appendChild(this._elImage),this._bSupportDataURI=null};return e.prototype.draw=function(a){var b=this._elImage,c=this._oContext,d=this._htOption,e=a.getModuleCount(),f=d.width/e,g=d.height/e,h=Math.round(f),i=Math.round(g);b.style.display="none",this.clear();for(var j=0;e>j;j++)for(var k=0;e>k;k++){var l=a.isDark(j,k),m=k*f,n=j*g;c.strokeStyle=l?d.colorDark:d.colorLight,c.lineWidth=1,c.fillStyle=l?d.colorDark:d.colorLight,c.fillRect(m,n,f,g),c.strokeRect(Math.floor(m)+.5,Math.floor(n)+.5,h,i),c.strokeRect(Math.ceil(m)-.5,Math.ceil(n)-.5,h,i)}this._bIsPainted=!0},e.prototype.makeImage=function(){this._bIsPainted&&d.call(this,a)},e.prototype.isPainted=function(){return this._bIsPainted},e.prototype.clear=function(){this._oContext.clearRect(0,0,this._elCanvas.width,this._elCanvas.height),this._bIsPainted=!1},e.prototype.round=function(a){return a?Math.floor(1e3*a)/1e3:a},e}():function(){var a=function(a,b){this._el=a,this._htOption=b};return a.prototype.draw=function(a){for(var b=this._htOption,c=this._el,d=a.getModuleCount(),e=Math.floor(b.width/d),f=Math.floor(b.height/d),g=['<table style="border:0;border-collapse:collapse;">'],h=0;d>h;h++){g.push("<tr>");for(var i=0;d>i;i++)g.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;width:'+e+"px;height:"+f+"px;background-color:"+(a.isDark(h,i)?b.colorDark:b.colorLight)+';"></td>');g.push("</tr>")}g.push("</table>"),c.innerHTML=g.join("");var j=c.childNodes[0],k=(b.width-j.offsetWidth)/2,l=(b.height-j.offsetHeight)/2;k>0&&l>0&&(j.style.margin=l+"px "+k+"px")},a.prototype.clear=function(){this._el.innerHTML=""},a}();QRCode=function(a,b){if(this._htOption={width:256,height:256,typeNumber:4,colorDark:"#000000",colorLight:"#ffffff",correctLevel:d.H},"string"==typeof b&&(b={text:b}),b)for(var c in b)this._htOption[c]=b[c];"string"==typeof a&&(a=document.getElementById(a)),this._android=n(),this._el=a,this._oQRCode=null,this._oDrawing=new q(this._el,this._htOption),this._htOption.text&&this.makeCode(this._htOption.text)},QRCode.prototype.makeCode=function(a){this._oQRCode=new b(r(a,this._htOption.correctLevel),this._htOption.correctLevel),this._oQRCode.addData(a),this._oQRCode.make(),this._el.title=a,this._oDrawing.draw(this._oQRCode),this.makeImage()},QRCode.prototype.makeImage=function(){"function"==typeof this._oDrawing.makeImage&&(!this._android||this._android>=3)&&this._oDrawing.makeImage()},QRCode.prototype.clear=function(){this._oDrawing.clear()},QRCode.CorrectLevel=d}();
    518   </script>
    519   </head>
    520   <body>
    521     <div class="header">
    522       <svg
    523         class="lock-icon"
    524         viewBox="0 0 28 28"
    525         fill="none"
    526         xmlns="http://www.w3.org/2000/svg"
    527       >
    528         <rect x="5" y="12" width="18" height="13" rx="3" stroke-width="1" />
    529         <path
    530           d="M9.5 12V9a4.5 4.5 0 0 1 9 0v3"
    531           stroke-width="1.5"
    532           stroke-linecap="round"
    533           fill="none"
    534         />
    535         <circle cx="14" cy="18" r="2" />
    536         <line
    537           x1="14"
    538           y1="20"
    539           x2="14"
    540           y2="22"
    541           stroke-width="1.5"
    542           stroke-linecap="round"
    543         />
    544       </svg>
    545       <div class="header-text">
    546         <h1>Paivana paywall</h1>
    547         <p>The resource requires a payment to access.</p>
    548       </div>
    549     </div>
    550 
    551     <div class="card-container">
    552       <div class="card">
    553         <!-- QR code + amount -->
    554         <div class="qr-wrap">
    555           {{#summary}}
    556           <p class="template-summary">{{ summary }}</p>
    557           {{/summary}}
    558           <p class="merchant-host">{{ merchant_backend }}</p>
    559 
    560           <div class="qr-taler-frame">
    561             <div style="padding: 10px; border-radius: 20px; background-color: white">
    562               <div class="qr-frame" id="qrcode" style="margin: 5px" >
    563                 </div>
    564             </div>
    565             <div class="qr-taler-logo">
    566               <!-- Taler Logo -->
    567               <div style="width: 100px; height: 50px" >
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    569               </div>
    570             </div>
    571           </div>
    572 
    573           <p class="qr-legend">Scan the QR with a GNU Taler wallet</p>
    574         </div>
    575 
    576         <!-- instructions -->
    577         <div class="steps">
    578           <a href="https://www.taler.net/wallet" target="_blank" class="step">
    579             <div class="step-num">1</div>
    580             <div class="step-body">
    581               <p class="step-title">Install</p>
    582               <p class="step-desc">
    583                 If you don't have one yet you can follow the instruction on
    584                 www.taler.net.
    585               </p>
    586             </div>
    587           </a>
    588           {{#has_choices}}
    589           <div class="step pay-choices" onclick="toggleDescription(this)">
    590             <div class="step-num">2</div>
    591             <div class="step-body ">
    592               <p class="step-title">
    593               <span>Pay {{default_choice.amount}} or see options</span>
    594               <svg name="toggle-arrow" data-accordion-icon="" class="arrow" aria-hidden="true" xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" viewBox="0 0 24 24"><path stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="m5 15 7-7 7 7"></path></svg> 
    595               </p>
    596               <p class="step-desc">
    597                 Your wallet will display the details of the transaction.
    598                 <ul class="price-list hidden">
    599                   {{#choices}}
    600                   {{#description}}
    601                   <li>{{amount}}: {{description}}</li>
    602                   {{/description}}
    603                   {{^description}}
    604                   <li>{{amount}}</li>
    605                   {{/description}}
    606                   {{/choices}}
    607                 </ul>
    608               </p>
    609             </div>
    610           </div>
    611           {{/has_choices}}
    612           {{^has_choices}}
    613           <div class="step">
    614             <div class="step-num">2</div>
    615             <div class="step-body">
    616               <p class="step-title">Pay {{default_choice.amount}}</p>
    617               <p class="step-desc">
    618                 Your wallet will display the details of the transaction.
    619               </p>
    620             </div>
    621           </div>
    622           {{/has_choices}}
    623           <div class="step">
    624             <div class="step-num">3</div>
    625             <div class="step-body">
    626               <p class="step-title">Access</p>
    627               <p class="step-desc">
    628                 You will be automatically redirected when confirmed.
    629               </p>
    630             </div>
    631           </div>
    632         </div>
    633 
    634         <p class="footer-note">
    635           Access is granted automatically once the transaction confirms.<br />
    636           Need help? <a href="https://www.taler.net/en/">Contact support</a>
    637         </p>
    638       </div>
    639     </div>
    640 
    641     <div class="footer">
    642       <p id="error-message"> </p>
    643       <div class="button-cta">
    644         <a target="_blank" id="taler-link" href="" class="cta">Pay now</a>
    645       </div>
    646     </div>
    647 
    648     <script>
    649       main();
    650     </script>
    651   </body>
    652 </html>