diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..45b2cea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+localhost-key.pem
+localhost.pem
\ No newline at end of file
diff --git a/README.md b/README.md
index 3c22b69..0a175a6 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
 # Chasse au trésor Lycée Pange
 
 **Auteur :** Antoine WAEHREN
+
+## Crédits
+
+Ce projet utilise le module QR Scanner de NIMIQ : https://github.com/nimiq/qr-scanner
\ No newline at end of file
diff --git a/index.php b/index.php
index 5eef8d2..fec54f1 100644
--- a/index.php
+++ b/index.php
@@ -1,13 +1,5 @@
 <?php
     require_once "require/base.php";
-
-    $art_nb = 3;
-
-    $database = new Database();
-    $stmt = $database->pdo_article->prepare("SELECT * FROM article WHERE id <= :id");
-    $stmt->bindValue(":id", $art_nb);
-    $stmt->execute();
-    $articles = $stmt->fetchAll();
 ?>
 
 <!DOCTYPE html>
@@ -17,6 +9,7 @@
             require_once $rq_path . "head.php";
         ?>
         <title><?= $tr["tab_title"]["home"]?></title>
+        <script type="module" src="<?= $rq_path ?>js/qrscan.js"></script>
     </head>
     <body>
         <header>
@@ -30,23 +23,18 @@
                 <p><?= $tr["home"]["subtitle"]?></p>
                 <p><?= $tr["home"]["message"]?></p>
             </header>
-            <nav>
+            <article>
+                <button>Scanner un QR code</button>
+                <p></p>
                 <video></video>
-                <script src="<?= $rq_path ?>js/qr-scanner/qr-scanner.umd.min.js"></script>
-                <script>
-                    const qrScanner = new QrScanner(
-                        document.querySelector("video"),
-                        result => console.log('decoded qr code:', result),
-                        {
-                            onDecodeError: error => {
-                            },
-                            highlightScanRegion: true,
-                            highlightCodeOutline: true,
-                        },
-                    );
-                    qrScanner.start();
-                </script>
-            </nav>
+                <p>Caméra sélectionnée :</p>
+                <select>
+                    <option value="rear" selected>Caméra arrière</option>
+                    <option value="front">Caméra avant</option>
+                </select> <!-- Emplacement du message d'erreur JS concernant la caméra. !-->
+                <p>Scanner depuis un fichier</p>
+                <input type="file" id="file-selector">
+            </article>
         </main>
         <footer>
             <?php
diff --git a/require/js/qr-scanner/qr-scanner-worker.min.js b/require/js/qr-scanner/qr-scanner-worker.min.js
index 21b8b12..9706332 100644
--- a/require/js/qr-scanner/qr-scanner-worker.min.js
+++ b/require/js/qr-scanner/qr-scanner-worker.min.js
@@ -1,4 +1,8 @@
-export const createWorker = () => new Worker(URL.createObjectURL(new Blob([`class x{constructor(a,b){this.width=b;this.height=a.length/b;this.data=a}static createEmpty(a,b){return new x(new Uint8ClampedArray(a*b),a)}get(a,b){return 0>a||a>=this.width||0>b||b>=this.height?!1:!!this.data[b*this.width+a]}set(a,b,c){this.data[b*this.width+a]=c?1:0}setRegion(a,b,c,d,e){for(let f=b;f<b+d;f++)for(let g=a;g<a+c;g++)this.set(g,f,!!e)}}
+export const createWorker = () =>
+  new Worker(
+    URL.createObjectURL(
+      new Blob([
+        `class x{constructor(a,b){this.width=b;this.height=a.length/b;this.data=a}static createEmpty(a,b){return new x(new Uint8ClampedArray(a*b),a)}get(a,b){return 0>a||a>=this.width||0>b||b>=this.height?!1:!!this.data[b*this.width+a]}set(a,b,c){this.data[b*this.width+a]=c?1:0}setRegion(a,b,c,d,e){for(let f=b;f<b+d;f++)for(let g=a;g<a+c;g++)this.set(g,f,!!e)}}
 class A{constructor(a,b,c){this.width=a;a*=b;if(c&&c.length!==a)throw Error("Wrong buffer size");this.data=c||new Uint8ClampedArray(a)}get(a,b){return this.data[b*this.width+a]}set(a,b,c){this.data[b*this.width+a]=c}}
 class ba{constructor(a){this.bitOffset=this.byteOffset=0;this.bytes=a}readBits(a){if(1>a||32<a||a>this.available())throw Error("Cannot read "+a.toString()+" bits");var b=0;if(0<this.bitOffset){b=8-this.bitOffset;var c=a<b?a:b;b-=c;b=(this.bytes[this.byteOffset]&255>>8-c<<b)>>b;a-=c;this.bitOffset+=c;8===this.bitOffset&&(this.bitOffset=0,this.byteOffset++)}if(0<a){for(;8<=a;)b=b<<8|this.bytes[this.byteOffset]&255,this.byteOffset++,a-=8;0<a&&(c=8-a,b=b<<a|(this.bytes[this.byteOffset]&255>>c<<c)>>c,
 this.bitOffset+=a)}return b}available(){return 8*(this.bytes.length-this.byteOffset)-this.bitOffset}}var B,C=B||(B={});C.Numeric="numeric";C.Alphanumeric="alphanumeric";C.Byte="byte";C.Kanji="kanji";C.ECI="eci";C.StructuredAppend="structuredappend";var D,E=D||(D={});E[E.Terminator=0]="Terminator";E[E.Numeric=1]="Numeric";E[E.Alphanumeric=2]="Alphanumeric";E[E.Byte=4]="Byte";E[E.Kanji=8]="Kanji";E[E.ECI=7]="ECI";E[E.StructuredAppend=3]="StructuredAppend";let F="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:".split("");
@@ -95,4 +99,8 @@ u.set(r,q,v)}h?(q=new Uint8ClampedArray(a.buffer,m,k),m+=k,q=new x(q,b)):q=x.cre
 y:z))||"attemptBoth"!==e.inversionAttempts&&"invertFirst"!==e.inversionAttempts||(f=V(d?z:y));return f}X.default=X;let Y="dontInvert",Z={red:77,green:150,blue:29,useIntegerApproximation:!0};
 self.onmessage=a=>{let b=a.data.id,c=a.data.data;switch(a.data.type){case "decode":(a=X(c.data,c.width,c.height,{inversionAttempts:Y,greyScaleWeights:Z}))?self.postMessage({id:b,type:"qrResult",data:a.data,cornerPoints:[a.location.topLeftCorner,a.location.topRightCorner,a.location.bottomRightCorner,a.location.bottomLeftCorner]}):self.postMessage({id:b,type:"qrResult",data:null});break;case "grayscaleWeights":Z.red=c.red;Z.green=c.green;Z.blue=c.blue;Z.useIntegerApproximation=c.useIntegerApproximation;
 break;case "inversionMode":switch(c){case "original":Y="dontInvert";break;case "invert":Y="onlyInvert";break;case "both":Y="attemptBoth";break;default:throw Error("Invalid inversion mode");}break;case "close":self.close()}}
-`]), { type: "application/javascript" }))//# sourceMappingURL=qr-scanner-worker.min.js.map
+`,
+      ]),
+      { type: "application/javascript" }
+    )
+  ); //# sourceMappingURL=qr-scanner-worker.min.js.map
diff --git a/require/js/qr-scanner/qr-scanner-worker.min.js.map b/require/js/qr-scanner/qr-scanner-worker.min.js.map
new file mode 100644
index 0000000..618e36e
--- /dev/null
+++ b/require/js/qr-scanner/qr-scanner-worker.min.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"qr-scanner-worker.min.js","sources":["node_modules/jsqr-es6/src/BitMatrix.ts","node_modules/jsqr-es6/src/binarizer/index.ts","node_modules/jsqr-es6/src/decoder/decodeData/BitStream.ts","node_modules/jsqr-es6/src/decoder/decodeData/index.ts","node_modules/jsqr-es6/src/decoder/reedsolomon/GenericGFPoly.ts","node_modules/jsqr-es6/src/decoder/reedsolomon/GenericGF.ts","node_modules/jsqr-es6/src/decoder/reedsolomon/index.ts","node_modules/jsqr-es6/src/decoder/version.ts","node_modules/jsqr-es6/src/decoder/decoder.ts","node_modules/jsqr-es6/src/extractor/index.ts","node_modules/jsqr-es6/src/locator/index.ts","node_modules/jsqr-es6/src/index.ts","src/worker.ts"],"sourcesContent":["export class BitMatrix {\n  public static createEmpty(width: number, height: number) {\n    return new BitMatrix(new Uint8ClampedArray(width * height), width);\n  }\n\n  public width: number;\n  public height: number;\n  private data: Uint8ClampedArray;\n\n  constructor(data: Uint8ClampedArray, width: number) {\n    this.width = width;\n    this.height = data.length / width;\n    this.data = data;\n  }\n\n  public get(x: number, y: number): boolean {\n    if (x < 0 || x >= this.width || y < 0 || y >= this.height) {\n      return false;\n    }\n    return !!this.data[y * this.width + x];\n  }\n\n  public set(x: number, y: number, v: boolean) {\n    this.data[y * this.width + x] = v ? 1 : 0;\n  }\n\n  public setRegion(left: number, top: number, width: number, height: number, v: boolean) {\n    for (let y = top; y < top + height; y++) {\n      for (let x = left; x < left + width; x++) {\n        this.set(x, y, !!v);\n      }\n    }\n  }\n}\n","import {BitMatrix} from \"../BitMatrix\";\nimport {GreyscaleWeights} from \"../index\";\n\nconst REGION_SIZE = 8;\nconst MIN_DYNAMIC_RANGE = 24;\n\nfunction numBetween(value: number, min: number, max: number): number {\n  return value < min ? min : value > max ? max : value;\n}\n\n// Like BitMatrix but accepts arbitry Uint8 values\nclass Matrix {\n  private data: Uint8ClampedArray;\n  private width: number;\n  constructor(width: number, height: number, buffer?: Uint8ClampedArray) {\n    this.width = width;\n    const bufferSize = width * height;\n    if (buffer && buffer.length !== bufferSize) {\n      throw new Error(\"Wrong buffer size\");\n    }\n    this.data = buffer || new Uint8ClampedArray(bufferSize);\n  }\n  public get(x: number, y: number) {\n    return this.data[y * this.width + x];\n  }\n  public set(x: number, y: number, value: number) {\n    this.data[y * this.width + x] = value;\n  }\n}\n\nexport function binarize(data: Uint8ClampedArray, width: number, height: number, returnInverted: boolean,\n                         greyscaleWeights: GreyscaleWeights, canOverwriteImage: boolean) {\n  const pixelCount = width * height;\n  if (data.length !== pixelCount * 4) {\n    throw new Error(\"Malformed data passed to binarizer.\");\n  }\n  // assign the greyscale and binary image within the rgba buffer as the rgba image will not be needed after conversion\n  let bufferOffset = 0;\n  // Convert image to greyscale\n  let greyscaleBuffer: Uint8ClampedArray;\n  if (canOverwriteImage) {\n    greyscaleBuffer = new Uint8ClampedArray(data.buffer, bufferOffset, pixelCount);\n    bufferOffset += pixelCount;\n  }\n  const greyscalePixels = new Matrix(width, height, greyscaleBuffer);\n  if (greyscaleWeights.useIntegerApproximation) {\n    for (let y = 0; y < height; y++) {\n      for (let x = 0; x < width; x++) {\n        const pixelPosition = (y * width + x) * 4;\n        const r = data[pixelPosition];\n        const g = data[pixelPosition + 1];\n        const b = data[pixelPosition + 2];\n        greyscalePixels.set(x, y,\n          // tslint:disable-next-line no-bitwise\n          (greyscaleWeights.red * r + greyscaleWeights.green * g + greyscaleWeights.blue * b + 128) >> 8);\n      }\n    }\n  } else {\n    for (let y = 0; y < height; y++) {\n      for (let x = 0; x < width; x++) {\n        const pixelPosition = (y * width + x) * 4;\n        const r = data[pixelPosition];\n        const g = data[pixelPosition + 1];\n        const b = data[pixelPosition + 2];\n        greyscalePixels.set(x, y,\n          greyscaleWeights.red * r + greyscaleWeights.green * g + greyscaleWeights.blue * b);\n      }\n    }\n  }\n  const horizontalRegionCount = Math.ceil(width / REGION_SIZE);\n  const verticalRegionCount = Math.ceil(height / REGION_SIZE);\n  const blackPointsCount = horizontalRegionCount * verticalRegionCount;\n\n  let blackPointsBuffer: Uint8ClampedArray;\n  if (canOverwriteImage) {\n    blackPointsBuffer = new Uint8ClampedArray(data.buffer, bufferOffset, blackPointsCount);\n    bufferOffset += blackPointsCount;\n  }\n  const blackPoints = new Matrix(horizontalRegionCount, verticalRegionCount, blackPointsBuffer);\n  for (let verticalRegion = 0; verticalRegion < verticalRegionCount; verticalRegion++) {\n    for (let hortizontalRegion = 0; hortizontalRegion < horizontalRegionCount; hortizontalRegion++) {\n      let min = Infinity;\n      let max = 0;\n      for (let y = 0; y < REGION_SIZE; y++) {\n        for (let x = 0; x < REGION_SIZE; x++) {\n          const pixelLumosity =\n            greyscalePixels.get(hortizontalRegion * REGION_SIZE + x, verticalRegion * REGION_SIZE + y);\n          min = Math.min(min, pixelLumosity);\n          max = Math.max(max, pixelLumosity);\n        }\n      }\n      // We could also compute the real average of all pixels but following the assumption that the qr code consists\n      // of bright and dark pixels and essentially not much in between, by (min + max)/2 we make the cut really between\n      // those two classes. If using the average over all pixel in a block of mostly bright pixels and few dark pixels,\n      // the avg would tend to the bright side and darker bright pixels could be interpreted as dark.\n      let average = (min + max) / 2;\n      // Small bias towards black by moving the threshold up. We do this, as in the finder patterns white holes tend\n      // to appear which makes them undetectable.\n      const blackBias = 1.11;\n      average = Math.min(255, average * blackBias);\n      if (max - min <= MIN_DYNAMIC_RANGE) {\n        // If variation within the block is low, assume this is a block with only light or only\n        // dark pixels. In that case we do not want to use the average, as it would divide this\n        // low contrast area into black and white pixels, essentially creating data out of noise.\n        //\n        // Default the blackpoint for these blocks to be half the min - effectively white them out\n        average = min / 2;\n\n        if (verticalRegion > 0 && hortizontalRegion > 0) {\n          // Correct the \"white background\" assumption for blocks that have neighbors by comparing\n          // the pixels in this block to the previously calculated black points. This is based on\n          // the fact that dark barcode symbology is always surrounded by some amount of light\n          // background for which reasonable black point estimates were made. The bp estimated at\n          // the boundaries is used for the interior.\n\n          // The (min < bp) is arbitrary but works better than other heuristics that were tried.\n          const averageNeighborBlackPoint = (\n            blackPoints.get(hortizontalRegion, verticalRegion - 1) +\n            (2 * blackPoints.get(hortizontalRegion - 1, verticalRegion)) +\n            blackPoints.get(hortizontalRegion - 1, verticalRegion - 1)\n          ) / 4;\n          if (min < averageNeighborBlackPoint) {\n            average = averageNeighborBlackPoint; // no need to apply black bias as already applied to neighbors\n          }\n        }\n      }\n      blackPoints.set(hortizontalRegion, verticalRegion, average);\n    }\n  }\n\n  let binarized: BitMatrix;\n  if (canOverwriteImage) {\n    const binarizedBuffer = new Uint8ClampedArray(data.buffer, bufferOffset, pixelCount);\n    bufferOffset += pixelCount;\n    binarized = new BitMatrix(binarizedBuffer, width);\n  } else {\n    binarized = BitMatrix.createEmpty(width, height);\n  }\n\n  let inverted: BitMatrix = null;\n  if (returnInverted) {\n    if (canOverwriteImage) {\n      const invertedBuffer = new Uint8ClampedArray(data.buffer, bufferOffset, pixelCount);\n      inverted = new BitMatrix(invertedBuffer, width);\n    } else {\n      inverted = BitMatrix.createEmpty(width, height);\n    }\n  }\n\n  for (let verticalRegion = 0; verticalRegion < verticalRegionCount; verticalRegion++) {\n    for (let hortizontalRegion = 0; hortizontalRegion < horizontalRegionCount; hortizontalRegion++) {\n      const left = numBetween(hortizontalRegion, 2, horizontalRegionCount - 3);\n      const top = numBetween(verticalRegion, 2, verticalRegionCount - 3);\n      let sum = 0;\n      for (let xRegion = -2; xRegion <= 2; xRegion++) {\n        for (let yRegion = -2; yRegion <= 2; yRegion++) {\n          sum += blackPoints.get(left + xRegion, top + yRegion);\n        }\n      }\n      const threshold = sum / 25;\n      for (let xRegion = 0; xRegion < REGION_SIZE; xRegion++) {\n        for (let yRegion = 0; yRegion < REGION_SIZE; yRegion++) {\n          const x = hortizontalRegion * REGION_SIZE + xRegion;\n          const y = verticalRegion * REGION_SIZE + yRegion;\n          const lum = greyscalePixels.get(x, y);\n          binarized.set(x, y, lum <= threshold);\n          if (returnInverted) {\n            inverted.set(x, y, !(lum <= threshold));\n          }\n        }\n      }\n    }\n  }\n  if (returnInverted) {\n    return { binarized, inverted };\n  }\n  return { binarized };\n}\n","// tslint:disable:no-bitwise\n\nexport class BitStream {\n  private bytes: Uint8ClampedArray;\n  private byteOffset: number = 0;\n  private bitOffset: number = 0;\n\n  constructor(bytes: Uint8ClampedArray) {\n    this.bytes = bytes;\n  }\n\n  public readBits(numBits: number): number {\n    if (numBits < 1 || numBits > 32 || numBits > this.available()) {\n      throw new Error(\"Cannot read \" + numBits.toString() + \" bits\");\n    }\n\n    let result = 0;\n    // First, read remainder from current byte\n    if (this.bitOffset > 0) {\n      const bitsLeft = 8 - this.bitOffset;\n      const toRead = numBits < bitsLeft ? numBits : bitsLeft;\n      const bitsToNotRead = bitsLeft - toRead;\n      const mask = (0xFF >> (8 - toRead)) << bitsToNotRead;\n      result = (this.bytes[this.byteOffset] & mask) >> bitsToNotRead;\n      numBits -= toRead;\n      this.bitOffset += toRead;\n      if (this.bitOffset === 8) {\n        this.bitOffset = 0;\n        this.byteOffset++;\n      }\n    }\n\n    // Next read whole bytes\n    if (numBits > 0) {\n      while (numBits >= 8) {\n        result = (result << 8) | (this.bytes[this.byteOffset] & 0xFF);\n        this.byteOffset++;\n        numBits -= 8;\n      }\n\n      // Finally read a partial byte\n      if (numBits > 0) {\n        const bitsToNotRead = 8 - numBits;\n        const mask = (0xFF >> bitsToNotRead) << bitsToNotRead;\n        result = (result << numBits) | ((this.bytes[this.byteOffset] & mask) >> bitsToNotRead);\n        this.bitOffset += numBits;\n      }\n    }\n    return result;\n  }\n\n  public available(): number {\n    return 8 * (this.bytes.length - this.byteOffset) - this.bitOffset;\n  }\n}\n","// tslint:disable:no-bitwise\nimport { BitStream } from \"./BitStream\";\n\nexport interface Chunk {\n  type: Mode;\n  text: string;\n}\n\nexport interface ByteChunk {\n  type: Mode.Byte | Mode.Kanji;\n  bytes: number[];\n}\n\nexport interface ECIChunk {\n  type: Mode.ECI;\n  assignmentNumber: number;\n}\n\nexport interface StructuredAppend {\n  type: Mode.StructuredAppend;\n  currentSequence: number;\n  totalSequence: number;\n  parity: number;\n}\n\nexport type Chunks = Array<Chunk | ByteChunk | ECIChunk | StructuredAppend>;\n\nexport interface DecodedQR {\n  text: string;\n  bytes: number[];\n  chunks: Chunks;\n  version: number;\n}\n\nexport enum Mode {\n  Numeric = \"numeric\",\n  Alphanumeric = \"alphanumeric\",\n  Byte = \"byte\",\n  Kanji = \"kanji\",\n  ECI = \"eci\",\n  StructuredAppend = \"structuredappend\",\n}\n\nenum ModeByte {\n  Terminator = 0x0,\n  Numeric = 0x1,\n  Alphanumeric = 0x2,\n  Byte = 0x4,\n  Kanji = 0x8,\n  ECI = 0x7,\n  StructuredAppend = 0x3,\n  // FNC1FirstPosition = 0x5,\n  // FNC1SecondPosition = 0x9,\n}\n\nfunction decodeNumeric(stream: BitStream, size: number) {\n  const bytes: number[] = [];\n  let text = \"\";\n\n  const characterCountSize = [10, 12, 14][size];\n  let length = stream.readBits(characterCountSize);\n  // Read digits in groups of 3\n  while (length >= 3) {\n    const num = stream.readBits(10);\n    if (num >= 1000) {\n      throw new Error(\"Invalid numeric value above 999\");\n    }\n\n    const a = Math.floor(num / 100);\n    const b = Math.floor(num / 10) % 10;\n    const c = num % 10;\n\n    bytes.push(48 + a, 48 + b, 48 + c);\n    text += a.toString() + b.toString() + c.toString();\n    length -= 3;\n  }\n\n  // If the number of digits aren't a multiple of 3, the remaining digits are special cased.\n  if (length === 2) {\n    const num = stream.readBits(7);\n    if (num >= 100) {\n      throw new Error(\"Invalid numeric value above 99\");\n    }\n\n    const a = Math.floor(num / 10);\n    const b = num % 10;\n\n    bytes.push(48 + a, 48 + b);\n    text += a.toString() + b.toString();\n  } else if (length === 1) {\n    const num = stream.readBits(4);\n    if (num >= 10) {\n      throw new Error(\"Invalid numeric value above 9\");\n    }\n\n    bytes.push(48 + num);\n    text += num.toString();\n  }\n\n  return { bytes, text };\n}\n\nconst AlphanumericCharacterCodes = [\n  \"0\", \"1\", \"2\", \"3\", \"4\", \"5\", \"6\", \"7\", \"8\",\n  \"9\", \"A\", \"B\", \"C\", \"D\", \"E\", \"F\", \"G\", \"H\",\n  \"I\", \"J\", \"K\", \"L\", \"M\", \"N\", \"O\", \"P\", \"Q\",\n  \"R\", \"S\", \"T\", \"U\", \"V\", \"W\", \"X\", \"Y\", \"Z\",\n  \" \", \"$\", \"%\", \"*\", \"+\", \"-\", \".\", \"/\", \":\",\n];\n\nfunction decodeAlphanumeric(stream: BitStream, size: number) {\n  const bytes: number[] = [];\n  let text = \"\";\n\n  const characterCountSize = [9, 11, 13][size];\n  let length = stream.readBits(characterCountSize);\n  while (length >= 2) {\n    const v = stream.readBits(11);\n\n    const a = Math.floor(v / 45);\n    const b = v % 45;\n\n    bytes.push(AlphanumericCharacterCodes[a].charCodeAt(0), AlphanumericCharacterCodes[b].charCodeAt(0));\n    text += AlphanumericCharacterCodes[a] + AlphanumericCharacterCodes[b];\n    length -= 2;\n  }\n\n  if (length === 1) {\n    const a = stream.readBits(6);\n    bytes.push(AlphanumericCharacterCodes[a].charCodeAt(0));\n    text += AlphanumericCharacterCodes[a];\n  }\n\n  return { bytes, text };\n}\n\nfunction decodeByte(stream: BitStream, size: number) {\n  const bytes: number[] = [];\n  let text = \"\";\n\n  const characterCountSize = [8, 16, 16][size];\n  const length = stream.readBits(characterCountSize);\n  for (let i = 0; i < length; i++) {\n    const b = stream.readBits(8);\n    bytes.push(b);\n  }\n  try {\n    text += decodeURIComponent(bytes.map(b => `%${(\"0\" + b.toString(16)).substr(-2)}`).join(\"\"));\n  } catch {\n    // failed to decode\n  }\n\n  return { bytes, text };\n}\n\nfunction decodeKanji(stream: BitStream, size: number) {\n  const bytes: number[] = [];\n\n  const characterCountSize = [8, 10, 12][size];\n  const length = stream.readBits(characterCountSize);\n  for (let i = 0; i < length; i++) {\n    const k = stream.readBits(13);\n\n    let c = (Math.floor(k / 0xC0) << 8) | (k % 0xC0);\n    if (c < 0x1F00) {\n      c += 0x8140;\n    } else {\n      c += 0xC140;\n    }\n\n    bytes.push(c >> 8, c & 0xFF);\n  }\n\n  const text = new TextDecoder(\"shift-jis\").decode(Uint8Array.from(bytes));\n  return { bytes, text };\n}\n\nexport function decode(data: Uint8ClampedArray, version: number): DecodedQR {\n  const stream = new BitStream(data);\n\n  // There are 3 'sizes' based on the version. 1-9 is small (0), 10-26 is medium (1) and 27-40 is large (2).\n  const size = version <= 9 ? 0 : version <= 26 ? 1 : 2;\n\n  const result: DecodedQR = {\n    text: \"\",\n    bytes: [],\n    chunks: [],\n    version,\n  };\n\n  while (stream.available() >= 4) {\n    const mode = stream.readBits(4);\n    if (mode === ModeByte.Terminator) {\n      return result;\n    } else if (mode === ModeByte.ECI) {\n      if (stream.readBits(1) === 0) {\n        result.chunks.push({\n          type: Mode.ECI,\n          assignmentNumber: stream.readBits(7),\n        });\n      } else if (stream.readBits(1) === 0) {\n        result.chunks.push({\n          type: Mode.ECI,\n          assignmentNumber: stream.readBits(14),\n        });\n      } else if (stream.readBits(1) === 0) {\n        result.chunks.push({\n          type: Mode.ECI,\n          assignmentNumber: stream.readBits(21),\n        });\n      } else {\n        // ECI data seems corrupted\n        result.chunks.push({\n          type: Mode.ECI,\n          assignmentNumber: -1,\n        });\n      }\n    } else if (mode === ModeByte.Numeric) {\n      const numericResult = decodeNumeric(stream, size);\n      result.text += numericResult.text;\n      result.bytes.push(...numericResult.bytes);\n      result.chunks.push({\n        type: Mode.Numeric,\n        text: numericResult.text,\n      });\n    } else if (mode === ModeByte.Alphanumeric) {\n      const alphanumericResult = decodeAlphanumeric(stream, size);\n      result.text += alphanumericResult.text;\n      result.bytes.push(...alphanumericResult.bytes);\n      result.chunks.push({\n        type: Mode.Alphanumeric,\n        text: alphanumericResult.text,\n      });\n    } else if (mode === ModeByte.Byte) {\n      const byteResult = decodeByte(stream, size);\n      result.text += byteResult.text;\n      result.bytes.push(...byteResult.bytes);\n      result.chunks.push({\n        type: Mode.Byte,\n        bytes: byteResult.bytes,\n        text: byteResult.text,\n      });\n    } else if (mode === ModeByte.Kanji) {\n      const kanjiResult = decodeKanji(stream, size);\n      result.text += kanjiResult.text;\n      result.bytes.push(...kanjiResult.bytes);\n      result.chunks.push({\n        type: Mode.Kanji,\n        bytes: kanjiResult.bytes,\n        text: kanjiResult.text,\n      });\n    } else if (mode === ModeByte.StructuredAppend) {\n      result.chunks.push({\n        type: Mode.StructuredAppend,\n        currentSequence: stream.readBits(4),\n        totalSequence: stream.readBits(4),\n        parity: stream.readBits(8),\n      });\n    }\n  }\n\n  // If there is no data left, or the remaining bits are all 0, then that counts as a termination marker\n  if (stream.available() === 0 || stream.readBits(stream.available()) === 0) {\n    return result;\n  }\n}\n","import GenericGF, { addOrSubtractGF } from \"./GenericGF\";\n\nexport default class GenericGFPoly {\n  private field: GenericGF;\n  private coefficients: Uint8ClampedArray;\n\n  constructor(field: GenericGF, coefficients: Uint8ClampedArray) {\n    if (coefficients.length === 0) {\n      throw new Error(\"No coefficients.\");\n    }\n    this.field = field;\n    const coefficientsLength = coefficients.length;\n    if (coefficientsLength > 1 && coefficients[0] === 0) {\n      // Leading term must be non-zero for anything except the constant polynomial \"0\"\n      let firstNonZero = 1;\n      while (firstNonZero < coefficientsLength && coefficients[firstNonZero] === 0) {\n        firstNonZero++;\n      }\n      if (firstNonZero === coefficientsLength) {\n        this.coefficients = field.zero.coefficients;\n      } else {\n        this.coefficients = new Uint8ClampedArray(coefficientsLength - firstNonZero);\n        for (let i = 0; i < this.coefficients.length; i++) {\n          this.coefficients[i] = coefficients[firstNonZero + i];\n        }\n      }\n    } else {\n      this.coefficients = coefficients;\n    }\n  }\n\n  public degree() {\n    return this.coefficients.length - 1;\n  }\n\n  public isZero() {\n    return this.coefficients[0] === 0;\n  }\n\n  public getCoefficient(degree: number) {\n    return this.coefficients[this.coefficients.length - 1 - degree];\n  }\n\n  public addOrSubtract(other: GenericGFPoly) {\n    if (this.isZero()) {\n      return other;\n    }\n    if (other.isZero()) {\n      return this;\n    }\n\n    let smallerCoefficients = this.coefficients;\n    let largerCoefficients = other.coefficients;\n    if (smallerCoefficients.length > largerCoefficients.length) {\n      [smallerCoefficients, largerCoefficients] = [largerCoefficients, smallerCoefficients];\n    }\n    const sumDiff = new Uint8ClampedArray(largerCoefficients.length);\n    const lengthDiff = largerCoefficients.length - smallerCoefficients.length;\n    for (let i = 0; i < lengthDiff; i++) {\n      sumDiff[i] = largerCoefficients[i];\n    }\n\n    for (let i = lengthDiff; i < largerCoefficients.length; i++) {\n      sumDiff[i] = addOrSubtractGF(smallerCoefficients[i - lengthDiff], largerCoefficients[i]);\n    }\n\n    return new GenericGFPoly(this.field, sumDiff);\n  }\n\n  public multiply(scalar: number) {\n    if (scalar === 0) {\n      return this.field.zero;\n    }\n    if (scalar === 1) {\n      return this;\n    }\n    const size = this.coefficients.length;\n    const product = new Uint8ClampedArray(size);\n    for (let i = 0; i < size; i++) {\n      product[i] = this.field.multiply(this.coefficients[i], scalar);\n    }\n\n    return new GenericGFPoly(this.field, product);\n  }\n\n  public multiplyPoly(other: GenericGFPoly): GenericGFPoly {\n    if (this.isZero() || other.isZero()) {\n      return this.field.zero;\n    }\n    const aCoefficients = this.coefficients;\n    const aLength = aCoefficients.length;\n    const bCoefficients = other.coefficients;\n    const bLength = bCoefficients.length;\n    const product = new Uint8ClampedArray(aLength + bLength - 1);\n    for (let i = 0; i < aLength; i++) {\n      const aCoeff = aCoefficients[i];\n      for (let j = 0; j < bLength; j++) {\n        product[i + j] = addOrSubtractGF(product[i + j],\n          this.field.multiply(aCoeff, bCoefficients[j]));\n      }\n    }\n    return new GenericGFPoly(this.field, product);\n  }\n\n  public multiplyByMonomial(degree: number, coefficient: number) {\n    if (degree < 0) {\n      throw new Error(\"Invalid degree less than 0\");\n    }\n    if (coefficient === 0) {\n      return this.field.zero;\n    }\n    const size = this.coefficients.length;\n    const product = new Uint8ClampedArray(size + degree);\n    for (let i = 0; i < size; i++) {\n      product[i] = this.field.multiply(this.coefficients[i], coefficient);\n    }\n    return new GenericGFPoly(this.field, product);\n  }\n\n  public evaluateAt(a: number) {\n    let result = 0;\n    if (a === 0) {\n      // Just return the x^0 coefficient\n      return this.getCoefficient(0);\n    }\n    const size = this.coefficients.length;\n    if (a === 1) {\n      // Just the sum of the coefficients\n      this.coefficients.forEach((coefficient) => {\n        result = addOrSubtractGF(result, coefficient);\n      });\n      return result;\n    }\n    result = this.coefficients[0];\n    for (let i = 1; i < size; i++) {\n      result = addOrSubtractGF(this.field.multiply(a, result), this.coefficients[i]);\n    }\n    return result;\n  }\n}\n","import GenericGFPoly from \"./GenericGFPoly\";\n\nexport function addOrSubtractGF(a: number, b: number) {\n  return a ^ b; // tslint:disable-line:no-bitwise\n}\n\nexport default class GenericGF {\n  public primitive: number;\n  public size: number;\n  public generatorBase: number;\n  public zero: GenericGFPoly;\n  public one: GenericGFPoly;\n\n  private expTable: number[];\n  private logTable: number[];\n\n  constructor(primitive: number, size: number, genBase: number) {\n    this.primitive = primitive;\n    this.size = size;\n    this.generatorBase = genBase;\n    this.expTable = new Array(this.size);\n    this.logTable = new Array(this.size);\n\n    let x = 1;\n    for (let i = 0; i < this.size; i++) {\n      this.expTable[i] = x;\n      x = x * 2;\n      if (x >= this.size) {\n        x = (x ^ this.primitive) & (this.size - 1); // tslint:disable-line:no-bitwise\n      }\n    }\n\n    for (let i = 0; i < this.size - 1; i++) {\n      this.logTable[this.expTable[i]] = i;\n    }\n    this.zero = new GenericGFPoly(this, Uint8ClampedArray.from([0]));\n    this.one = new GenericGFPoly(this, Uint8ClampedArray.from([1]));\n  }\n\n  public multiply(a: number, b: number) {\n    if (a === 0 || b === 0) {\n      return 0;\n    }\n    return this.expTable[(this.logTable[a] + this.logTable[b]) % (this.size - 1)];\n  }\n\n  public inverse(a: number) {\n    if (a === 0) {\n      throw new Error(\"Can't invert 0\");\n    }\n    return this.expTable[this.size - this.logTable[a] - 1];\n  }\n\n  public buildMonomial(degree: number, coefficient: number): GenericGFPoly {\n    if (degree < 0) {\n      throw new Error(\"Invalid monomial degree less than 0\");\n    }\n    if (coefficient === 0) {\n      return this.zero;\n    }\n    const coefficients = new Uint8ClampedArray(degree + 1);\n    coefficients[0] = coefficient;\n    return new GenericGFPoly(this, coefficients);\n  }\n\n  public log(a: number) {\n    if (a === 0) {\n      throw new Error(\"Can't take log(0)\");\n    }\n    return this.logTable[a];\n  }\n\n  public exp(a: number) {\n    return this.expTable[a];\n  }\n}\n","import GenericGF, { addOrSubtractGF } from \"./GenericGF\";\nimport GenericGFPoly from \"./GenericGFPoly\";\n\nfunction runEuclideanAlgorithm(field: GenericGF, a: GenericGFPoly, b: GenericGFPoly, R: number): GenericGFPoly[] {\n  // Assume a's degree is >= b's\n  if (a.degree() < b.degree()) {\n    [a, b] = [b, a];\n  }\n\n  let rLast = a;\n  let r = b;\n  let tLast = field.zero;\n  let t = field.one;\n\n  // Run Euclidean algorithm until r's degree is less than R/2\n  while (r.degree() >= R / 2) {\n    const rLastLast = rLast;\n    const tLastLast = tLast;\n    rLast = r;\n    tLast = t;\n\n    // Divide rLastLast by rLast, with quotient in q and remainder in r\n    if (rLast.isZero()) {\n      // Euclidean algorithm already terminated?\n      return null;\n    }\n    r = rLastLast;\n    let q = field.zero;\n    const denominatorLeadingTerm = rLast.getCoefficient(rLast.degree());\n    const dltInverse = field.inverse(denominatorLeadingTerm);\n    while (r.degree() >= rLast.degree() && !r.isZero()) {\n      const degreeDiff = r.degree() - rLast.degree();\n      const scale = field.multiply(r.getCoefficient(r.degree()), dltInverse);\n      q = q.addOrSubtract(field.buildMonomial(degreeDiff, scale));\n      r = r.addOrSubtract(rLast.multiplyByMonomial(degreeDiff, scale));\n    }\n\n    t = q.multiplyPoly(tLast).addOrSubtract(tLastLast);\n\n    if (r.degree() >= rLast.degree()) {\n      return null;\n    }\n  }\n\n  const sigmaTildeAtZero = t.getCoefficient(0);\n  if (sigmaTildeAtZero === 0) {\n    return null;\n  }\n\n  const inverse = field.inverse(sigmaTildeAtZero);\n  return [t.multiply(inverse), r.multiply(inverse)];\n}\n\nfunction findErrorLocations(field: GenericGF, errorLocator: GenericGFPoly): number[] {\n  // This is a direct application of Chien's search\n  const numErrors = errorLocator.degree();\n  if (numErrors === 1) {\n    return [errorLocator.getCoefficient(1)];\n  }\n  const result: number[] = new Array(numErrors);\n  let errorCount = 0;\n  for (let i = 1; i < field.size && errorCount < numErrors; i++) {\n    if (errorLocator.evaluateAt(i) === 0) {\n      result[errorCount] = field.inverse(i);\n      errorCount++;\n    }\n  }\n  if (errorCount !== numErrors) {\n    return null;\n  }\n  return result;\n}\n\nfunction findErrorMagnitudes(field: GenericGF, errorEvaluator: GenericGFPoly, errorLocations: number[]): number[] {\n  // This is directly applying Forney's Formula\n  const s = errorLocations.length;\n  const result: number[] = new Array(s);\n  for (let i = 0; i < s; i++) {\n    const xiInverse = field.inverse(errorLocations[i]);\n    let denominator = 1;\n    for (let j = 0; j < s; j++) {\n      if (i !== j) {\n        denominator = field.multiply(denominator, addOrSubtractGF(1, field.multiply(errorLocations[j], xiInverse)));\n      }\n    }\n    result[i] = field.multiply(errorEvaluator.evaluateAt(xiInverse), field.inverse(denominator));\n    if (field.generatorBase !== 0) {\n      result[i] = field.multiply(result[i], xiInverse);\n    }\n  }\n  return result;\n}\n\nexport function decode(bytes: number[], twoS: number) {\n  const outputBytes = new Uint8ClampedArray(bytes.length);\n  outputBytes.set(bytes);\n\n  const field = new GenericGF(0x011D, 256, 0); // x^8 + x^4 + x^3 + x^2 + 1\n  const poly = new GenericGFPoly(field, outputBytes);\n\n  const syndromeCoefficients = new Uint8ClampedArray(twoS);\n  let error = false;\n  for (let s = 0; s < twoS; s++) {\n    const evaluation = poly.evaluateAt(field.exp(s + field.generatorBase));\n    syndromeCoefficients[syndromeCoefficients.length - 1 - s] = evaluation;\n    if (evaluation !== 0) {\n      error = true;\n    }\n  }\n  if (!error) {\n    return outputBytes;\n  }\n\n  const syndrome = new GenericGFPoly(field, syndromeCoefficients);\n\n  const sigmaOmega = runEuclideanAlgorithm(field, field.buildMonomial(twoS, 1), syndrome, twoS);\n  if (sigmaOmega === null) {\n    return null;\n  }\n\n  const errorLocations = findErrorLocations(field, sigmaOmega[0]);\n  if (errorLocations == null) {\n    return null;\n  }\n\n  const errorMagnitudes = findErrorMagnitudes(field, sigmaOmega[1], errorLocations);\n  for (let i = 0; i < errorLocations.length; i++) {\n    const position = outputBytes.length - 1 - field.log(errorLocations[i]);\n    if (position < 0) {\n      return null;\n    }\n    outputBytes[position] = addOrSubtractGF(outputBytes[position], errorMagnitudes[i]);\n  }\n\n  return outputBytes;\n}\n","export interface Version {\n  infoBits: number;\n  versionNumber: number;\n  alignmentPatternCenters: number[];\n  errorCorrectionLevels: Array<{\n    ecCodewordsPerBlock: number;\n    ecBlocks: Array<{\n      numBlocks: number;\n      dataCodewordsPerBlock: number;\n    }>\n  }>;\n}\n\nexport const VERSIONS: Version[] = [\n  {\n    infoBits: null,\n    versionNumber: 1,\n    alignmentPatternCenters: [],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 7,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 19 }],\n      },\n      {\n        ecCodewordsPerBlock: 10,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 16 }],\n      },\n      {\n        ecCodewordsPerBlock: 13,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 13 }],\n      },\n      {\n        ecCodewordsPerBlock: 17,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 9 }],\n      },\n    ],\n  },\n  {\n    infoBits: null,\n    versionNumber: 2,\n    alignmentPatternCenters: [6, 18],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 10,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 34 }],\n      },\n      {\n        ecCodewordsPerBlock: 16,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 28 }],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 22 }],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 16 }],\n      },\n    ],\n  },\n  {\n    infoBits: null,\n    versionNumber: 3,\n    alignmentPatternCenters: [6, 22],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 15,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 55 }],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 44 }],\n      },\n      {\n        ecCodewordsPerBlock: 18,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 17 }],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 13 }],\n      },\n    ],\n  },\n  {\n    infoBits: null,\n    versionNumber: 4,\n    alignmentPatternCenters: [6, 26],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 20,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 80 }],\n      },\n      {\n        ecCodewordsPerBlock: 18,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 32 }],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 24 }],\n      },\n      {\n        ecCodewordsPerBlock: 16,\n        ecBlocks: [{ numBlocks: 4, dataCodewordsPerBlock: 9 }],\n      },\n    ],\n  },\n  {\n    infoBits: null,\n    versionNumber: 5,\n    alignmentPatternCenters: [6, 30],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [{ numBlocks: 1, dataCodewordsPerBlock: 108 }],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 43 }],\n      },\n      {\n        ecCodewordsPerBlock: 18,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 15 },\n          { numBlocks: 2, dataCodewordsPerBlock: 16 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 11 },\n          { numBlocks: 2, dataCodewordsPerBlock: 12 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: null,\n    versionNumber: 6,\n    alignmentPatternCenters: [6, 34],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 18,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 68 }],\n      },\n      {\n        ecCodewordsPerBlock: 16,\n        ecBlocks: [{ numBlocks: 4, dataCodewordsPerBlock: 27 }],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [{ numBlocks: 4, dataCodewordsPerBlock: 19 }],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [{ numBlocks: 4, dataCodewordsPerBlock: 15 }],\n      },\n    ],\n  },\n  {\n    infoBits: 0x07C94,\n    versionNumber: 7,\n    alignmentPatternCenters: [6, 22, 38],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 20,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 78 }],\n      },\n      {\n        ecCodewordsPerBlock: 18,\n        ecBlocks: [{ numBlocks: 4, dataCodewordsPerBlock: 31 }],\n      },\n      {\n        ecCodewordsPerBlock: 18,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 14 },\n          { numBlocks: 4, dataCodewordsPerBlock: 15 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 13 },\n          { numBlocks: 1, dataCodewordsPerBlock: 14 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x085BC,\n    versionNumber: 8,\n    alignmentPatternCenters: [6, 24, 42],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 97 }],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 38 },\n          { numBlocks: 2, dataCodewordsPerBlock: 39 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 18 },\n          { numBlocks: 2, dataCodewordsPerBlock: 19 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 14 },\n          { numBlocks: 2, dataCodewordsPerBlock: 15 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x09A99,\n    versionNumber: 9,\n    alignmentPatternCenters: [6, 26, 46],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [{ numBlocks: 2, dataCodewordsPerBlock: 116 }],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 36 },\n          { numBlocks: 2, dataCodewordsPerBlock: 37 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 20,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 16 },\n          { numBlocks: 4, dataCodewordsPerBlock: 17 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 12 },\n          { numBlocks: 4, dataCodewordsPerBlock: 13 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x0A4D3,\n    versionNumber: 10,\n    alignmentPatternCenters: [6, 28, 50],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 18,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 68 },\n          { numBlocks: 2, dataCodewordsPerBlock: 69 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 43 },\n          { numBlocks: 1, dataCodewordsPerBlock: 44 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 6, dataCodewordsPerBlock: 19 },\n          { numBlocks: 2, dataCodewordsPerBlock: 20 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 6, dataCodewordsPerBlock: 15 },\n          { numBlocks: 2, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x0BBF6,\n    versionNumber: 11,\n    alignmentPatternCenters: [6, 30, 54],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 20,\n        ecBlocks: [{ numBlocks: 4, dataCodewordsPerBlock: 81 }],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 1, dataCodewordsPerBlock: 50 },\n          { numBlocks: 4, dataCodewordsPerBlock: 51 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 22 },\n          { numBlocks: 4, dataCodewordsPerBlock: 23 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 12 },\n          { numBlocks: 8, dataCodewordsPerBlock: 13 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x0C762,\n    versionNumber: 12,\n    alignmentPatternCenters: [6, 32, 58],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 92 },\n          { numBlocks: 2, dataCodewordsPerBlock: 93 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 6, dataCodewordsPerBlock: 36 },\n          { numBlocks: 2, dataCodewordsPerBlock: 37 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 20 },\n          { numBlocks: 6, dataCodewordsPerBlock: 21 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 7, dataCodewordsPerBlock: 14 },\n          { numBlocks: 4, dataCodewordsPerBlock: 15 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x0D847,\n    versionNumber: 13,\n    alignmentPatternCenters: [6, 34, 62],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [{ numBlocks: 4, dataCodewordsPerBlock: 107 }],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 8, dataCodewordsPerBlock: 37 },\n          { numBlocks: 1, dataCodewordsPerBlock: 38 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 8, dataCodewordsPerBlock: 20 },\n          { numBlocks: 4, dataCodewordsPerBlock: 21 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 12, dataCodewordsPerBlock: 11 },\n          { numBlocks: 4, dataCodewordsPerBlock: 12 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x0E60D,\n    versionNumber: 14,\n    alignmentPatternCenters: [6, 26, 46, 66],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 115 },\n          { numBlocks: 1, dataCodewordsPerBlock: 116 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 40 },\n          { numBlocks: 5, dataCodewordsPerBlock: 41 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 20,\n        ecBlocks: [\n          { numBlocks: 11, dataCodewordsPerBlock: 16 },\n          { numBlocks: 5, dataCodewordsPerBlock: 17 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 11, dataCodewordsPerBlock: 12 },\n          { numBlocks: 5, dataCodewordsPerBlock: 13 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x0F928,\n    versionNumber: 15,\n    alignmentPatternCenters: [6, 26, 48, 70],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 22,\n        ecBlocks: [\n          { numBlocks: 5, dataCodewordsPerBlock: 87 },\n          { numBlocks: 1, dataCodewordsPerBlock: 88 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 5, dataCodewordsPerBlock: 41 },\n          { numBlocks: 5, dataCodewordsPerBlock: 42 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 5, dataCodewordsPerBlock: 24 },\n          { numBlocks: 7, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 11, dataCodewordsPerBlock: 12 },\n          { numBlocks: 7, dataCodewordsPerBlock: 13 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x10B78,\n    versionNumber: 16,\n    alignmentPatternCenters: [6, 26, 50, 74],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 5, dataCodewordsPerBlock: 98 },\n          { numBlocks: 1, dataCodewordsPerBlock: 99 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 7, dataCodewordsPerBlock: 45 },\n          { numBlocks: 3, dataCodewordsPerBlock: 46 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [\n          { numBlocks: 15, dataCodewordsPerBlock: 19 },\n          { numBlocks: 2, dataCodewordsPerBlock: 20 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 15 },\n          { numBlocks: 13, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x1145D,\n    versionNumber: 17,\n    alignmentPatternCenters: [6, 30, 54, 78],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 1, dataCodewordsPerBlock: 107 },\n          { numBlocks: 5, dataCodewordsPerBlock: 108 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 10, dataCodewordsPerBlock: 46 },\n          { numBlocks: 1, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 1, dataCodewordsPerBlock: 22 },\n          { numBlocks: 15, dataCodewordsPerBlock: 23 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 14 },\n          { numBlocks: 17, dataCodewordsPerBlock: 15 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x12A17,\n    versionNumber: 18,\n    alignmentPatternCenters: [6, 30, 56, 82],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 5, dataCodewordsPerBlock: 120 },\n          { numBlocks: 1, dataCodewordsPerBlock: 121 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 9, dataCodewordsPerBlock: 43 },\n          { numBlocks: 4, dataCodewordsPerBlock: 44 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 17, dataCodewordsPerBlock: 22 },\n          { numBlocks: 1, dataCodewordsPerBlock: 23 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 14 },\n          { numBlocks: 19, dataCodewordsPerBlock: 15 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x13532,\n    versionNumber: 19,\n    alignmentPatternCenters: [6, 30, 58, 86],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 113 },\n          { numBlocks: 4, dataCodewordsPerBlock: 114 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 44 },\n          { numBlocks: 11, dataCodewordsPerBlock: 45 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 17, dataCodewordsPerBlock: 21 },\n          { numBlocks: 4, dataCodewordsPerBlock: 22 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 9, dataCodewordsPerBlock: 13 },\n          { numBlocks: 16, dataCodewordsPerBlock: 14 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x149A6,\n    versionNumber: 20,\n    alignmentPatternCenters: [6, 34, 62, 90],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 107 },\n          { numBlocks: 5, dataCodewordsPerBlock: 108 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 41 },\n          { numBlocks: 13, dataCodewordsPerBlock: 42 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 15, dataCodewordsPerBlock: 24 },\n          { numBlocks: 5, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 15, dataCodewordsPerBlock: 15 },\n          { numBlocks: 10, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x15683,\n    versionNumber: 21,\n    alignmentPatternCenters: [6, 28, 50, 72, 94],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 116 },\n          { numBlocks: 4, dataCodewordsPerBlock: 117 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [{ numBlocks: 17, dataCodewordsPerBlock: 42 }],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 17, dataCodewordsPerBlock: 22 },\n          { numBlocks: 6, dataCodewordsPerBlock: 23 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 19, dataCodewordsPerBlock: 16 },\n          { numBlocks: 6, dataCodewordsPerBlock: 17 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x168C9,\n    versionNumber: 22,\n    alignmentPatternCenters: [6, 26, 50, 74, 98],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 111 },\n          { numBlocks: 7, dataCodewordsPerBlock: 112 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [{ numBlocks: 17, dataCodewordsPerBlock: 46 }],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 7, dataCodewordsPerBlock: 24 },\n          { numBlocks: 16, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 24,\n        ecBlocks: [{ numBlocks: 34, dataCodewordsPerBlock: 13 }],\n      },\n    ],\n  },\n  {\n    infoBits: 0x177EC,\n    versionNumber: 23,\n    alignmentPatternCenters: [6, 30, 54, 74, 102],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 121 },\n          { numBlocks: 5, dataCodewordsPerBlock: 122 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 47 },\n          { numBlocks: 14, dataCodewordsPerBlock: 48 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 11, dataCodewordsPerBlock: 24 },\n          { numBlocks: 14, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 16, dataCodewordsPerBlock: 15 },\n          { numBlocks: 14, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x18EC4,\n    versionNumber: 24,\n    alignmentPatternCenters: [6, 28, 54, 80, 106],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 6, dataCodewordsPerBlock: 117 },\n          { numBlocks: 4, dataCodewordsPerBlock: 118 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 6, dataCodewordsPerBlock: 45 },\n          { numBlocks: 14, dataCodewordsPerBlock: 46 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 11, dataCodewordsPerBlock: 24 },\n          { numBlocks: 16, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 30, dataCodewordsPerBlock: 16 },\n          { numBlocks: 2, dataCodewordsPerBlock: 17 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x191E1,\n    versionNumber: 25,\n    alignmentPatternCenters: [6, 32, 58, 84, 110],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 26,\n        ecBlocks: [\n          { numBlocks: 8, dataCodewordsPerBlock: 106 },\n          { numBlocks: 4, dataCodewordsPerBlock: 107 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 8, dataCodewordsPerBlock: 47 },\n          { numBlocks: 13, dataCodewordsPerBlock: 48 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 7, dataCodewordsPerBlock: 24 },\n          { numBlocks: 22, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 22, dataCodewordsPerBlock: 15 },\n          { numBlocks: 13, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x1AFAB,\n    versionNumber: 26,\n    alignmentPatternCenters: [6, 30, 58, 86, 114],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 10, dataCodewordsPerBlock: 114 },\n          { numBlocks: 2, dataCodewordsPerBlock: 115 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 19, dataCodewordsPerBlock: 46 },\n          { numBlocks: 4, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 28, dataCodewordsPerBlock: 22 },\n          { numBlocks: 6, dataCodewordsPerBlock: 23 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 33, dataCodewordsPerBlock: 16 },\n          { numBlocks: 4, dataCodewordsPerBlock: 17 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x1B08E,\n    versionNumber: 27,\n    alignmentPatternCenters: [6, 34, 62, 90, 118],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 8, dataCodewordsPerBlock: 122 },\n          { numBlocks: 4, dataCodewordsPerBlock: 123 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 22, dataCodewordsPerBlock: 45 },\n          { numBlocks: 3, dataCodewordsPerBlock: 46 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 8, dataCodewordsPerBlock: 23 },\n          { numBlocks: 26, dataCodewordsPerBlock: 24 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 12, dataCodewordsPerBlock: 15 },\n          { numBlocks: 28, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x1CC1A,\n    versionNumber: 28,\n    alignmentPatternCenters: [6, 26, 50, 74, 98, 122],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 117 },\n          { numBlocks: 10, dataCodewordsPerBlock: 118 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 3, dataCodewordsPerBlock: 45 },\n          { numBlocks: 23, dataCodewordsPerBlock: 46 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 24 },\n          { numBlocks: 31, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 11, dataCodewordsPerBlock: 15 },\n          { numBlocks: 31, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x1D33F,\n    versionNumber: 29,\n    alignmentPatternCenters: [6, 30, 54, 78, 102, 126],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 7, dataCodewordsPerBlock: 116 },\n          { numBlocks: 7, dataCodewordsPerBlock: 117 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 21, dataCodewordsPerBlock: 45 },\n          { numBlocks: 7, dataCodewordsPerBlock: 46 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 1, dataCodewordsPerBlock: 23 },\n          { numBlocks: 37, dataCodewordsPerBlock: 24 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 19, dataCodewordsPerBlock: 15 },\n          { numBlocks: 26, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x1ED75,\n    versionNumber: 30,\n    alignmentPatternCenters: [6, 26, 52, 78, 104, 130],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 5, dataCodewordsPerBlock: 115 },\n          { numBlocks: 10, dataCodewordsPerBlock: 116 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 19, dataCodewordsPerBlock: 47 },\n          { numBlocks: 10, dataCodewordsPerBlock: 48 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 15, dataCodewordsPerBlock: 24 },\n          { numBlocks: 25, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 23, dataCodewordsPerBlock: 15 },\n          { numBlocks: 25, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x1F250,\n    versionNumber: 31,\n    alignmentPatternCenters: [6, 30, 56, 82, 108, 134],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 13, dataCodewordsPerBlock: 115 },\n          { numBlocks: 3, dataCodewordsPerBlock: 116 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 46 },\n          { numBlocks: 29, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 42, dataCodewordsPerBlock: 24 },\n          { numBlocks: 1, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 23, dataCodewordsPerBlock: 15 },\n          { numBlocks: 28, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x209D5,\n    versionNumber: 32,\n    alignmentPatternCenters: [6, 34, 60, 86, 112, 138],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [{ numBlocks: 17, dataCodewordsPerBlock: 115 }],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 10, dataCodewordsPerBlock: 46 },\n          { numBlocks: 23, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 10, dataCodewordsPerBlock: 24 },\n          { numBlocks: 35, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 19, dataCodewordsPerBlock: 15 },\n          { numBlocks: 35, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x216F0,\n    versionNumber: 33,\n    alignmentPatternCenters: [6, 30, 58, 86, 114, 142],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 17, dataCodewordsPerBlock: 115 },\n          { numBlocks: 1, dataCodewordsPerBlock: 116 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 14, dataCodewordsPerBlock: 46 },\n          { numBlocks: 21, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 29, dataCodewordsPerBlock: 24 },\n          { numBlocks: 19, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 11, dataCodewordsPerBlock: 15 },\n          { numBlocks: 46, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x228BA,\n    versionNumber: 34,\n    alignmentPatternCenters: [6, 34, 62, 90, 118, 146],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 13, dataCodewordsPerBlock: 115 },\n          { numBlocks: 6, dataCodewordsPerBlock: 116 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 14, dataCodewordsPerBlock: 46 },\n          { numBlocks: 23, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 44, dataCodewordsPerBlock: 24 },\n          { numBlocks: 7, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 59, dataCodewordsPerBlock: 16 },\n          { numBlocks: 1, dataCodewordsPerBlock: 17 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x2379F,\n    versionNumber: 35,\n    alignmentPatternCenters: [6, 30, 54, 78, 102, 126, 150],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 12, dataCodewordsPerBlock: 121 },\n          { numBlocks: 7, dataCodewordsPerBlock: 122 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 12, dataCodewordsPerBlock: 47 },\n          { numBlocks: 26, dataCodewordsPerBlock: 48 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 39, dataCodewordsPerBlock: 24 },\n          { numBlocks: 14, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 22, dataCodewordsPerBlock: 15 },\n          { numBlocks: 41, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x24B0B,\n    versionNumber: 36,\n    alignmentPatternCenters: [ 6, 24, 50, 76, 102, 128, 154 ],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 6, dataCodewordsPerBlock: 121 },\n          { numBlocks: 14, dataCodewordsPerBlock: 122 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 6, dataCodewordsPerBlock: 47 },\n          { numBlocks: 34, dataCodewordsPerBlock: 48 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 46, dataCodewordsPerBlock: 24 },\n          { numBlocks: 10, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 2, dataCodewordsPerBlock: 15 },\n          { numBlocks: 64, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x2542E,\n    versionNumber: 37,\n    alignmentPatternCenters: [ 6, 28, 54, 80, 106, 132, 158 ],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 17, dataCodewordsPerBlock: 122 },\n          { numBlocks: 4, dataCodewordsPerBlock: 123 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 29, dataCodewordsPerBlock: 46 },\n          { numBlocks: 14, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 49, dataCodewordsPerBlock: 24 },\n          { numBlocks: 10, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 24, dataCodewordsPerBlock: 15 },\n          { numBlocks: 46, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x26A64,\n    versionNumber: 38,\n    alignmentPatternCenters: [ 6, 32, 58, 84, 110, 136, 162 ],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 4, dataCodewordsPerBlock: 122 },\n          { numBlocks: 18, dataCodewordsPerBlock: 123 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 13, dataCodewordsPerBlock: 46 },\n          { numBlocks: 32, dataCodewordsPerBlock: 47 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 48, dataCodewordsPerBlock: 24 },\n          { numBlocks: 14, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 42, dataCodewordsPerBlock: 15 },\n          { numBlocks: 32, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x27541,\n    versionNumber: 39,\n    alignmentPatternCenters: [ 6, 26, 54, 82, 110, 138, 166 ],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 20, dataCodewordsPerBlock: 117 },\n          { numBlocks: 4, dataCodewordsPerBlock: 118 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 40, dataCodewordsPerBlock: 47 },\n          { numBlocks: 7, dataCodewordsPerBlock: 48 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 43, dataCodewordsPerBlock: 24 },\n          { numBlocks: 22, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 10, dataCodewordsPerBlock: 15 },\n          { numBlocks: 67, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n  {\n    infoBits: 0x28C69,\n    versionNumber: 40,\n    alignmentPatternCenters: [ 6, 30, 58, 86, 114, 142, 170 ],\n    errorCorrectionLevels: [\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 19, dataCodewordsPerBlock: 118 },\n          { numBlocks: 6, dataCodewordsPerBlock: 119 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 28,\n        ecBlocks: [\n          { numBlocks: 18, dataCodewordsPerBlock: 47 },\n          { numBlocks: 31, dataCodewordsPerBlock: 48 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 34, dataCodewordsPerBlock: 24 },\n          { numBlocks: 34, dataCodewordsPerBlock: 25 },\n        ],\n      },\n      {\n        ecCodewordsPerBlock: 30,\n        ecBlocks: [\n          { numBlocks: 20, dataCodewordsPerBlock: 15 },\n          { numBlocks: 61, dataCodewordsPerBlock: 16 },\n        ],\n      },\n    ],\n  },\n];\n","import { BitMatrix } from \"../BitMatrix\";\nimport { Point } from \"../Point\";\nimport { decode as decodeData, DecodedQR } from \"./decodeData\";\nimport { decode as rsDecode } from \"./reedsolomon\";\nimport { Version, VERSIONS } from \"./version\";\n\n// tslint:disable:no-bitwise\nfunction numBitsDiffering(x: number, y: number) {\n  let z = x ^ y;\n  let bitCount = 0;\n  while (z) {\n    bitCount++;\n    z &= z - 1;\n  }\n  return bitCount;\n}\n\nfunction pushBit(bit: any, byte: number) {\n  return (byte << 1) | bit;\n}\n// tslint:enable:no-bitwise\n\nconst FORMAT_INFO_TABLE = [\n  { bits: 0x5412, formatInfo: { errorCorrectionLevel: 1, dataMask: 0 } },\n  { bits: 0x5125, formatInfo: { errorCorrectionLevel: 1, dataMask: 1 } },\n  { bits: 0x5E7C, formatInfo: { errorCorrectionLevel: 1, dataMask: 2 } },\n  { bits: 0x5B4B, formatInfo: { errorCorrectionLevel: 1, dataMask: 3 } },\n  { bits: 0x45F9, formatInfo: { errorCorrectionLevel: 1, dataMask: 4 } },\n  { bits: 0x40CE, formatInfo: { errorCorrectionLevel: 1, dataMask: 5 } },\n  { bits: 0x4F97, formatInfo: { errorCorrectionLevel: 1, dataMask: 6 } },\n  { bits: 0x4AA0, formatInfo: { errorCorrectionLevel: 1, dataMask: 7 } },\n  { bits: 0x77C4, formatInfo: { errorCorrectionLevel: 0, dataMask: 0 } },\n  { bits: 0x72F3, formatInfo: { errorCorrectionLevel: 0, dataMask: 1 } },\n  { bits: 0x7DAA, formatInfo: { errorCorrectionLevel: 0, dataMask: 2 } },\n  { bits: 0x789D, formatInfo: { errorCorrectionLevel: 0, dataMask: 3 } },\n  { bits: 0x662F, formatInfo: { errorCorrectionLevel: 0, dataMask: 4 } },\n  { bits: 0x6318, formatInfo: { errorCorrectionLevel: 0, dataMask: 5 } },\n  { bits: 0x6C41, formatInfo: { errorCorrectionLevel: 0, dataMask: 6 } },\n  { bits: 0x6976, formatInfo: { errorCorrectionLevel: 0, dataMask: 7 } },\n  { bits: 0x1689, formatInfo: { errorCorrectionLevel: 3, dataMask: 0 } },\n  { bits: 0x13BE, formatInfo: { errorCorrectionLevel: 3, dataMask: 1 } },\n  { bits: 0x1CE7, formatInfo: { errorCorrectionLevel: 3, dataMask: 2 } },\n  { bits: 0x19D0, formatInfo: { errorCorrectionLevel: 3, dataMask: 3 } },\n  { bits: 0x0762, formatInfo: { errorCorrectionLevel: 3, dataMask: 4 } },\n  { bits: 0x0255, formatInfo: { errorCorrectionLevel: 3, dataMask: 5 } },\n  { bits: 0x0D0C, formatInfo: { errorCorrectionLevel: 3, dataMask: 6 } },\n  { bits: 0x083B, formatInfo: { errorCorrectionLevel: 3, dataMask: 7 } },\n  { bits: 0x355F, formatInfo: { errorCorrectionLevel: 2, dataMask: 0 } },\n  { bits: 0x3068, formatInfo: { errorCorrectionLevel: 2, dataMask: 1 } },\n  { bits: 0x3F31, formatInfo: { errorCorrectionLevel: 2, dataMask: 2 } },\n  { bits: 0x3A06, formatInfo: { errorCorrectionLevel: 2, dataMask: 3 } },\n  { bits: 0x24B4, formatInfo: { errorCorrectionLevel: 2, dataMask: 4 } },\n  { bits: 0x2183, formatInfo: { errorCorrectionLevel: 2, dataMask: 5 } },\n  { bits: 0x2EDA, formatInfo: { errorCorrectionLevel: 2, dataMask: 6 } },\n  { bits: 0x2BED, formatInfo: { errorCorrectionLevel: 2, dataMask: 7 } },\n];\n\nconst DATA_MASKS = [\n  (p: Point) => ((p.y + p.x) % 2) === 0,\n  (p: Point) => (p.y % 2) === 0,\n  (p: Point) => p.x % 3 === 0,\n  (p: Point) => (p.y + p.x) % 3 === 0,\n  (p: Point) => (Math.floor(p.y / 2) + Math.floor(p.x / 3)) % 2 === 0,\n  (p: Point) => ((p.x * p.y) % 2) + ((p.x * p.y) % 3) === 0,\n  (p: Point) => ((((p.y * p.x) % 2) + (p.y * p.x) % 3) % 2) === 0,\n  (p: Point) => ((((p.y + p.x) % 2) + (p.y * p.x) % 3) % 2) === 0,\n];\n\ninterface FormatInformation {\n  errorCorrectionLevel: number;\n  dataMask: number;\n}\n\nfunction buildFunctionPatternMask(version: Version): BitMatrix {\n  const dimension = 17 + 4 * version.versionNumber;\n  const matrix = BitMatrix.createEmpty(dimension, dimension);\n\n  matrix.setRegion(0, 0, 9, 9, true); // Top left finder pattern + separator + format\n  matrix.setRegion(dimension - 8, 0, 8, 9, true); // Top right finder pattern + separator + format\n  matrix.setRegion(0, dimension - 8, 9, 8, true); // Bottom left finder pattern + separator + format\n\n  // Alignment patterns\n  for (const x of version.alignmentPatternCenters) {\n    for (const y of version.alignmentPatternCenters) {\n      if (!(x === 6 && y === 6 || x === 6 && y === dimension - 7 || x === dimension - 7 && y === 6)) {\n        matrix.setRegion(x - 2, y - 2, 5, 5, true);\n      }\n    }\n  }\n\n  matrix.setRegion(6, 9, 1, dimension - 17, true); // Vertical timing pattern\n  matrix.setRegion(9, 6, dimension - 17, 1, true); // Horizontal timing pattern\n\n  if (version.versionNumber > 6) {\n    matrix.setRegion(dimension - 11, 0, 3, 6, true); // Version info, top right\n    matrix.setRegion(0, dimension - 11, 6, 3, true); // Version info, bottom left\n  }\n\n  return matrix;\n}\n\nfunction readCodewords(matrix: BitMatrix, version: Version, formatInfo: FormatInformation) {\n  const dataMask = DATA_MASKS[formatInfo.dataMask];\n  const dimension = matrix.height;\n\n  const functionPatternMask = buildFunctionPatternMask(version);\n\n  const codewords: number[] = [];\n  let currentByte = 0;\n  let bitsRead = 0;\n\n  // Read columns in pairs, from right to left\n  let readingUp = true;\n  for (let columnIndex = dimension - 1; columnIndex > 0; columnIndex -= 2) {\n    if (columnIndex === 6) { // Skip whole column with vertical alignment pattern;\n      columnIndex--;\n    }\n    for (let i = 0; i < dimension; i++) {\n      const y = readingUp ? dimension - 1 - i : i;\n      for (let columnOffset = 0; columnOffset < 2; columnOffset++) {\n        const x = columnIndex - columnOffset;\n        if (!functionPatternMask.get(x, y)) {\n          bitsRead++;\n          let bit = matrix.get(x, y);\n          if (dataMask({y, x})) {\n            bit = !bit;\n          }\n          currentByte = pushBit(bit, currentByte);\n          if (bitsRead === 8) { // Whole bytes\n            codewords.push(currentByte);\n            bitsRead = 0;\n            currentByte = 0;\n          }\n        }\n      }\n    }\n    readingUp = !readingUp;\n  }\n  return codewords;\n}\n\nfunction readVersion(matrix: BitMatrix): Version {\n  const dimension = matrix.height;\n\n  const provisionalVersion = Math.floor((dimension - 17) / 4);\n  if (provisionalVersion <= 6) { // 6 and under dont have version info in the QR code\n    return VERSIONS[provisionalVersion - 1];\n  }\n\n  let topRightVersionBits = 0;\n  for (let y = 5; y >= 0; y--) {\n    for (let x = dimension - 9; x >= dimension - 11; x--) {\n      topRightVersionBits = pushBit(matrix.get(x, y), topRightVersionBits);\n    }\n  }\n\n  let bottomLeftVersionBits = 0;\n  for (let x = 5; x >= 0; x--) {\n    for (let y = dimension - 9; y >= dimension - 11; y--) {\n      bottomLeftVersionBits = pushBit(matrix.get(x, y), bottomLeftVersionBits);\n    }\n  }\n\n  let bestDifference = Infinity;\n  let bestVersion: Version;\n  for (const version of VERSIONS) {\n    if (version.infoBits === topRightVersionBits || version.infoBits === bottomLeftVersionBits) {\n      return version;\n    }\n\n    let difference = numBitsDiffering(topRightVersionBits, version.infoBits);\n    if (difference < bestDifference) {\n      bestVersion = version;\n      bestDifference = difference;\n    }\n\n    difference = numBitsDiffering(bottomLeftVersionBits, version.infoBits);\n    if (difference < bestDifference) {\n      bestVersion = version;\n      bestDifference = difference;\n    }\n  }\n  // We can tolerate up to 3 bits of error since no two version info codewords will\n  // differ in less than 8 bits.\n  if (bestDifference <= 3) {\n    return bestVersion;\n  }\n}\n\nfunction readFormatInformation(matrix: BitMatrix) {\n  let topLeftFormatInfoBits = 0;\n  for (let x = 0; x <= 8; x++) {\n    if (x !== 6) { // Skip timing pattern bit\n      topLeftFormatInfoBits = pushBit(matrix.get(x, 8), topLeftFormatInfoBits);\n    }\n  }\n  for (let y = 7; y >= 0; y--) {\n    if (y !== 6) { // Skip timing pattern bit\n      topLeftFormatInfoBits = pushBit(matrix.get(8, y), topLeftFormatInfoBits);\n    }\n  }\n\n  const dimension = matrix.height;\n  let topRightBottomRightFormatInfoBits = 0;\n  for (let y = dimension - 1; y >= dimension - 7; y--) { // bottom left\n    topRightBottomRightFormatInfoBits = pushBit(matrix.get(8, y), topRightBottomRightFormatInfoBits);\n  }\n  for (let x = dimension - 8; x < dimension; x++) { // top right\n    topRightBottomRightFormatInfoBits = pushBit(matrix.get(x, 8), topRightBottomRightFormatInfoBits);\n  }\n\n  let bestDifference = Infinity;\n  let bestFormatInfo = null;\n  for (const {bits, formatInfo} of FORMAT_INFO_TABLE) {\n    if (bits === topLeftFormatInfoBits || bits === topRightBottomRightFormatInfoBits) {\n      return formatInfo;\n    }\n    let difference = numBitsDiffering(topLeftFormatInfoBits, bits);\n    if (difference < bestDifference) {\n      bestFormatInfo = formatInfo;\n      bestDifference = difference;\n    }\n    if (topLeftFormatInfoBits !== topRightBottomRightFormatInfoBits) { // also try the other option\n      difference = numBitsDiffering(topRightBottomRightFormatInfoBits, bits);\n      if (difference < bestDifference) {\n        bestFormatInfo = formatInfo;\n        bestDifference = difference;\n      }\n    }\n  }\n  // Hamming distance of the 32 masked codes is 7, by construction, so <= 3 bits differing means we found a match\n  if (bestDifference <= 3) {\n    return bestFormatInfo;\n  }\n  return null;\n}\n\nfunction getDataBlocks(codewords: number[], version: Version, ecLevel: number) {\n  const ecInfo = version.errorCorrectionLevels[ecLevel];\n  const dataBlocks: Array<{\n    numDataCodewords: number;\n    codewords: number[];\n  }> = [];\n\n  let totalCodewords = 0;\n  ecInfo.ecBlocks.forEach(block => {\n    for (let i = 0; i < block.numBlocks; i++) {\n      dataBlocks.push({ numDataCodewords: block.dataCodewordsPerBlock, codewords: [] });\n      totalCodewords += block.dataCodewordsPerBlock + ecInfo.ecCodewordsPerBlock;\n    }\n  });\n\n  // In some cases the QR code will be malformed enough that we pull off more or less than we should.\n  // If we pull off less there's nothing we can do.\n  // If we pull off more we can safely truncate\n  if (codewords.length < totalCodewords) {\n    return null;\n  }\n  codewords = codewords.slice(0, totalCodewords);\n\n  const shortBlockSize = ecInfo.ecBlocks[0].dataCodewordsPerBlock;\n  // Pull codewords to fill the blocks up to the minimum size\n  for (let i = 0; i < shortBlockSize; i++) {\n    for (const dataBlock of dataBlocks) {\n      dataBlock.codewords.push(codewords.shift());\n    }\n  }\n\n  // If there are any large blocks, pull codewords to fill the last element of those\n  if (ecInfo.ecBlocks.length > 1) {\n    const smallBlockCount = ecInfo.ecBlocks[0].numBlocks;\n    const largeBlockCount = ecInfo.ecBlocks[1].numBlocks;\n    for (let i = 0; i < largeBlockCount; i++) {\n      dataBlocks[smallBlockCount + i].codewords.push(codewords.shift());\n    }\n  }\n\n  // Add the rest of the codewords to the blocks. These are the error correction codewords.\n  while (codewords.length > 0) {\n    for (const dataBlock of dataBlocks) {\n      dataBlock.codewords.push(codewords.shift());\n    }\n  }\n\n  return dataBlocks;\n}\n\nfunction decodeMatrix(matrix: BitMatrix) {\n  const version = readVersion(matrix);\n  if (!version) {\n    return null;\n  }\n\n  const formatInfo = readFormatInformation(matrix);\n  if (!formatInfo) {\n    return null;\n  }\n\n  const codewords = readCodewords(matrix, version, formatInfo);\n  const dataBlocks = getDataBlocks(codewords, version, formatInfo.errorCorrectionLevel);\n  if (!dataBlocks) {\n    return null;\n  }\n\n  // Count total number of data bytes\n  const totalBytes = dataBlocks.reduce((a, b) => a + b.numDataCodewords, 0);\n  const resultBytes = new Uint8ClampedArray(totalBytes);\n\n  let resultIndex = 0;\n  for (const dataBlock of dataBlocks) {\n    const correctedBytes = rsDecode(dataBlock.codewords, dataBlock.codewords.length - dataBlock.numDataCodewords);\n    if (!correctedBytes) {\n      return null;\n    }\n    for (let i = 0; i < dataBlock.numDataCodewords; i++) {\n      resultBytes[resultIndex++] = correctedBytes[i];\n    }\n  }\n\n  try {\n    return decodeData(resultBytes, version.versionNumber);\n  } catch {\n    return null;\n  }\n}\n\nexport function decode(matrix: BitMatrix): DecodedQR {\n  if (matrix == null) {\n    return null;\n  }\n  const result = decodeMatrix(matrix);\n  if (result) {\n    return result;\n  }\n  // Decoding didn't work, try mirroring the QR across the topLeft -> bottomRight line.\n  for (let x = 0; x < matrix.width; x++) {\n    for (let y = x + 1; y < matrix.height; y++) {\n      if (matrix.get(x, y) !== matrix.get(y, x)) {\n        matrix.set(x, y, !matrix.get(x, y));\n        matrix.set(y, x, !matrix.get(y, x));\n      }\n    }\n  }\n  return decodeMatrix(matrix);\n}\n","import {BitMatrix} from \"../BitMatrix\";\nimport {Point, QRLocation} from \"../locator\";\n\ninterface PerspectiveTransform {\n  a11: number;\n  a21: number;\n  a31: number;\n  a12: number;\n  a22: number;\n  a32: number;\n  a13: number;\n  a23: number;\n  a33: number;\n}\n\nfunction squareToQuadrilateral(p1: Point, p2: Point, p3: Point, p4: Point): PerspectiveTransform {\n  const dx3 = p1.x - p2.x + p3.x - p4.x;\n  const dy3 = p1.y - p2.y + p3.y - p4.y;\n  if (dx3 === 0 && dy3 === 0) { // Affine\n    return {\n      a11: p2.x - p1.x,\n      a12: p2.y - p1.y,\n      a13: 0,\n      a21: p3.x - p2.x,\n      a22: p3.y - p2.y,\n      a23: 0,\n      a31: p1.x,\n      a32: p1.y,\n      a33: 1,\n    };\n  } else {\n    const dx1 = p2.x - p3.x;\n    const dx2 = p4.x - p3.x;\n    const dy1 = p2.y - p3.y;\n    const dy2 = p4.y - p3.y;\n    const denominator = dx1 * dy2 - dx2 * dy1;\n    const a13 = (dx3 * dy2 - dx2 * dy3) / denominator;\n    const a23 = (dx1 * dy3 - dx3 * dy1) / denominator;\n    return {\n      a11: p2.x - p1.x + a13 * p2.x,\n      a12: p2.y - p1.y + a13 * p2.y,\n      a13,\n      a21: p4.x - p1.x + a23 * p4.x,\n      a22: p4.y - p1.y + a23 * p4.y,\n      a23,\n      a31: p1.x,\n      a32: p1.y,\n      a33: 1,\n    };\n  }\n}\n\nfunction quadrilateralToSquare(p1: Point, p2: Point, p3: Point, p4: Point): PerspectiveTransform {\n  // Here, the adjoint serves as the inverse:\n  const sToQ = squareToQuadrilateral(p1, p2, p3, p4);\n  return {\n    a11: sToQ.a22 * sToQ.a33 - sToQ.a23 * sToQ.a32,\n    a12: sToQ.a13 * sToQ.a32 - sToQ.a12 * sToQ.a33,\n    a13: sToQ.a12 * sToQ.a23 - sToQ.a13 * sToQ.a22,\n    a21: sToQ.a23 * sToQ.a31 - sToQ.a21 * sToQ.a33,\n    a22: sToQ.a11 * sToQ.a33 - sToQ.a13 * sToQ.a31,\n    a23: sToQ.a13 * sToQ.a21 - sToQ.a11 * sToQ.a23,\n    a31: sToQ.a21 * sToQ.a32 - sToQ.a22 * sToQ.a31,\n    a32: sToQ.a12 * sToQ.a31 - sToQ.a11 * sToQ.a32,\n    a33: sToQ.a11 * sToQ.a22 - sToQ.a12 * sToQ.a21,\n  };\n}\n\nfunction times(a: PerspectiveTransform, b: PerspectiveTransform): PerspectiveTransform {\n  return {\n    a11: a.a11 * b.a11 + a.a21 * b.a12 + a.a31 * b.a13,\n    a12: a.a12 * b.a11 + a.a22 * b.a12 + a.a32 * b.a13,\n    a13: a.a13 * b.a11 + a.a23 * b.a12 + a.a33 * b.a13,\n    a21: a.a11 * b.a21 + a.a21 * b.a22 + a.a31 * b.a23,\n    a22: a.a12 * b.a21 + a.a22 * b.a22 + a.a32 * b.a23,\n    a23: a.a13 * b.a21 + a.a23 * b.a22 + a.a33 * b.a23,\n    a31: a.a11 * b.a31 + a.a21 * b.a32 + a.a31 * b.a33,\n    a32: a.a12 * b.a31 + a.a22 * b.a32 + a.a32 * b.a33,\n    a33: a.a13 * b.a31 + a.a23 * b.a32 + a.a33 * b.a33,\n  };\n}\n\nexport function extract(image: BitMatrix, location: QRLocation) {\n  const qToS = quadrilateralToSquare(\n    {x: 3.5, y: 3.5},\n    {x: location.dimension - 3.5, y: 3.5},\n    {x: location.dimension - 6.5, y: location.dimension - 6.5},\n    {x: 3.5, y: location.dimension - 3.5},\n  );\n  const sToQ = squareToQuadrilateral(location.topLeft, location.topRight, location.alignmentPattern, location.bottomLeft);\n  const transform = times(sToQ, qToS);\n\n  const matrix = BitMatrix.createEmpty(location.dimension, location.dimension);\n  const mappingFunction = (x: number, y: number) => {\n    const denominator = transform.a13 * x + transform.a23 * y + transform.a33;\n    return {\n      x: (transform.a11 * x + transform.a21 * y + transform.a31) / denominator,\n      y: (transform.a12 * x + transform.a22 * y + transform.a32) / denominator,\n    };\n  };\n\n  for (let y = 0; y < location.dimension; y++) {\n    for (let x = 0; x < location.dimension; x++) {\n      const xValue = x + 0.5;\n      const yValue = y + 0.5;\n      const sourcePixel = mappingFunction(xValue, yValue);\n      matrix.set(x, y, image.get(Math.floor(sourcePixel.x), Math.floor(sourcePixel.y)));\n    }\n  }\n\n  return {\n    matrix,\n    mappingFunction,\n  };\n}\n","import { BitMatrix } from \"../BitMatrix\";\n\nconst MAX_FINDERPATTERNS_TO_SEARCH = 5;\nconst MIN_QUAD_RATIO = 0.5;\nconst MAX_QUAD_RATIO = 1.5;\n\nexport interface Point {\n  x: number;\n  y: number;\n}\n\nexport interface QRLocation {\n  topRight: Point;\n  bottomLeft: Point;\n  topLeft: Point;\n  alignmentPattern: Point;\n  dimension: number;\n}\n\nconst distance = (a: Point, b: Point) => Math.sqrt((b.x - a.x) ** 2 + (b.y - a.y) ** 2);\n\nfunction sum(values: number[]) {\n  return values.reduce((a, b) => a + b);\n}\n\n// Takes three finder patterns and organizes them into topLeft, topRight, etc\nfunction reorderFinderPatterns(pattern1: Point, pattern2: Point, pattern3: Point) {\n  // Find distances between pattern centers\n  const oneTwoDistance = distance(pattern1, pattern2);\n  const twoThreeDistance = distance(pattern2, pattern3);\n  const oneThreeDistance = distance(pattern1, pattern3);\n\n  let bottomLeft: Point;\n  let topLeft: Point;\n  let topRight: Point;\n\n  // Assume one closest to other two is B; A and C will just be guesses at first\n  if (twoThreeDistance >= oneTwoDistance && twoThreeDistance >= oneThreeDistance) {\n    [bottomLeft, topLeft, topRight] = [pattern2, pattern1, pattern3];\n  } else if (oneThreeDistance >= twoThreeDistance && oneThreeDistance >= oneTwoDistance) {\n    [bottomLeft, topLeft, topRight] = [pattern1, pattern2, pattern3];\n  } else {\n    [bottomLeft, topLeft, topRight] = [pattern1, pattern3, pattern2];\n  }\n\n  // Use cross product to figure out whether bottomLeft (A) and topRight (C) are correct or flipped in relation to topLeft (B)\n  // This asks whether BC x BA has a positive z component, which is the arrangement we want. If it's negative, then\n  // we've got it flipped around and should swap topRight and bottomLeft.\n  if (((topRight.x - topLeft.x) * (bottomLeft.y - topLeft.y)) - ((topRight.y - topLeft.y) * (bottomLeft.x - topLeft.x)) < 0) {\n    [bottomLeft, topRight] = [topRight, bottomLeft];\n  }\n\n  return { bottomLeft, topLeft, topRight };\n}\n\n// Computes the dimension (number of modules on a side) of the QR Code based on the position of the finder patterns\nfunction computeDimension(topLeft: Point, topRight: Point, bottomLeft: Point, matrix: BitMatrix) {\n  const moduleSize = (\n    sum(countBlackWhiteRun(topLeft, bottomLeft, matrix, 5)) / 7 + // Divide by 7 since the ratio is 1:1:3:1:1\n    sum(countBlackWhiteRun(topLeft, topRight, matrix, 5)) / 7 +\n    sum(countBlackWhiteRun(bottomLeft, topLeft, matrix, 5)) / 7 +\n    sum(countBlackWhiteRun(topRight, topLeft, matrix, 5)) / 7\n  ) / 4;\n\n  if (moduleSize < 1) {\n    throw new Error(\"Invalid module size\");\n  }\n\n  const topDimension = Math.round(distance(topLeft, topRight) / moduleSize);\n  const sideDimension = Math.round(distance(topLeft, bottomLeft) / moduleSize);\n  let dimension = Math.floor((topDimension + sideDimension) / 2) + 7;\n  switch (dimension % 4) {\n    case 0:\n      dimension++;\n      break;\n    case 2:\n      dimension--;\n      break;\n  }\n  return { dimension, moduleSize };\n}\n\n// Takes an origin point and an end point and counts the sizes of the black white run from the origin towards the end point.\n// Returns an array of elements, representing the pixel size of the black white run.\n// Uses a variant of http://en.wikipedia.org/wiki/Bresenham's_line_algorithm\nfunction countBlackWhiteRunTowardsPoint(origin: Point, end: Point, matrix: BitMatrix, length: number) {\n  const switchPoints: Point[] = [{x: Math.floor(origin.x), y: Math.floor(origin.y)}];\n  const steep = Math.abs(end.y - origin.y) > Math.abs(end.x - origin.x);\n\n  let fromX: number;\n  let fromY: number;\n  let toX: number;\n  let toY: number;\n  if (steep) {\n    fromX = Math.floor(origin.y);\n    fromY = Math.floor(origin.x);\n    toX = Math.floor(end.y);\n    toY = Math.floor(end.x);\n  } else {\n    fromX = Math.floor(origin.x);\n    fromY = Math.floor(origin.y);\n    toX = Math.floor(end.x);\n    toY = Math.floor(end.y);\n  }\n\n  const dx = Math.abs(toX - fromX);\n  const dy = Math.abs(toY - fromY);\n  let error = Math.floor(-dx / 2);\n  const xStep = fromX < toX ? 1 : -1;\n  const yStep = fromY < toY ? 1 : -1;\n\n  let currentPixel = true;\n  // Loop up until x == toX, but not beyond\n  for (let x = fromX, y = fromY; x !== toX + xStep; x += xStep) {\n    // Does current pixel mean we have moved white to black or vice versa?\n    // Scanning black in state 0,2 and white in state 1, so if we find the wrong\n    // color, advance to next state or end if we are in state 2 already\n    const realX = steep ? y : x;\n    const realY = steep ? x : y;\n    if (matrix.get(realX, realY) !== currentPixel) {\n      currentPixel = !currentPixel;\n      switchPoints.push({x: realX, y: realY});\n      if (switchPoints.length === length + 1) {\n        break;\n      }\n    }\n    error += dy;\n    if (error > 0) {\n      if (y === toY) {\n        break;\n      }\n      y += yStep;\n      error -= dx;\n    }\n  }\n  const distances: number[] = [];\n  for (let i = 0; i < length; i++) {\n    if (switchPoints[i] && switchPoints[i + 1]) {\n      distances.push(distance(switchPoints[i], switchPoints[i + 1]));\n    } else {\n      distances.push(0);\n    }\n  }\n  return distances;\n}\n\n// Takes an origin point and an end point and counts the sizes of the black white run in the origin point\n// along the line that intersects with the end point. Returns an array of elements, representing the pixel sizes\n// of the black white run. Takes a length which represents the number of switches from black to white to look for.\nfunction countBlackWhiteRun(origin: Point, end: Point, matrix: BitMatrix, length: number) {\n  const rise = end.y - origin.y;\n  const run = end.x - origin.x;\n\n  const towardsEnd = countBlackWhiteRunTowardsPoint(origin, end, matrix, Math.ceil(length / 2));\n  const awayFromEnd = countBlackWhiteRunTowardsPoint(origin, {x: origin.x - run, y: origin.y - rise}, matrix, Math.ceil(length / 2));\n\n  const middleValue = towardsEnd.shift() + awayFromEnd.shift() - 1; // Substract one so we don't double count a pixel\n  return awayFromEnd.concat(middleValue).concat(...towardsEnd);\n}\n\n// Takes in a black white run and an array of expected ratios. Returns the average size of the run as well as the \"error\" -\n// that is the amount the run diverges from the expected ratio\nfunction scoreBlackWhiteRun(sequence: number[], ratios: number[]) {\n  const averageSize = sum(sequence) / sum(ratios);\n  let error = 0;\n  ratios.forEach((ratio, i) => {\n    error += (sequence[i] - ratio * averageSize) ** 2;\n  });\n\n  return { averageSize, error };\n}\n\n// Takes an X,Y point and an array of sizes and scores the point against those ratios.\n// For example for a finder pattern takes the ratio list of 1:1:3:1:1 and checks horizontal, vertical and diagonal ratios\n// against that.\nfunction scorePattern(point: Point, ratios: number[], matrix: BitMatrix) {\n  try {\n    const horizontalRun = countBlackWhiteRun(point, {x: -1, y: point.y}, matrix, ratios.length);\n    const verticalRun = countBlackWhiteRun(point, {x: point.x, y: -1}, matrix, ratios.length);\n\n    const topLeftPoint = {\n      x: Math.max(0, point.x - point.y) - 1,\n      y: Math.max(0, point.y - point.x) - 1,\n    };\n    const topLeftBottomRightRun = countBlackWhiteRun(point, topLeftPoint, matrix, ratios.length);\n\n    const bottomLeftPoint = {\n      x: Math.min(matrix.width, point.x + point.y) + 1,\n      y: Math.min(matrix.height, point.y + point.x) + 1,\n    };\n    const bottomLeftTopRightRun = countBlackWhiteRun(point, bottomLeftPoint, matrix, ratios.length);\n\n    const horzError = scoreBlackWhiteRun(horizontalRun, ratios);\n    const vertError = scoreBlackWhiteRun(verticalRun, ratios);\n    const diagDownError = scoreBlackWhiteRun(topLeftBottomRightRun, ratios);\n    const diagUpError = scoreBlackWhiteRun(bottomLeftTopRightRun, ratios);\n\n    const ratioError = Math.sqrt(horzError.error * horzError.error +\n      vertError.error * vertError.error +\n      diagDownError.error * diagDownError.error +\n      diagUpError.error * diagUpError.error);\n\n    const avgSize = (horzError.averageSize + vertError.averageSize + diagDownError.averageSize + diagUpError.averageSize) / 4;\n\n    const sizeError = ((horzError.averageSize - avgSize) ** 2 +\n      (vertError.averageSize - avgSize) ** 2 +\n      (diagDownError.averageSize - avgSize) ** 2 +\n      (diagUpError.averageSize - avgSize) ** 2) / avgSize;\n    return ratioError + sizeError;\n  } catch {\n    return Infinity;\n  }\n}\n\nfunction recenterLocation(matrix: BitMatrix, p: Point): Point {\n  let leftX = Math.round(p.x);\n  while (matrix.get(leftX, Math.round(p.y))) {\n    leftX--;\n  }\n  let rightX = Math.round(p.x);\n  while (matrix.get(rightX, Math.round(p.y))) {\n    rightX++;\n  }\n  const x = (leftX + rightX) / 2;\n\n  let topY = Math.round(p.y);\n  while (matrix.get(Math.round(x), topY)) {\n    topY--;\n  }\n  let bottomY = Math.round(p.y);\n  while (matrix.get(Math.round(x), bottomY)) {\n    bottomY++;\n  }\n  const y = (topY + bottomY) / 2;\n\n  return { x, y };\n}\n\ninterface Quad {\n  top: {\n    startX: number;\n    endX: number;\n    y: number;\n  };\n  bottom: {\n    startX: number;\n    endX: number;\n    y: number;\n  };\n}\n\nexport function locate(matrix: BitMatrix): QRLocation[] {\n  const finderPatternQuads: Quad[] = [];\n  let activeFinderPatternQuads: Quad[] = [];\n  const alignmentPatternQuads: Quad[] = [];\n  let activeAlignmentPatternQuads: Quad[] = [];\n\n  for (let y = 0; y <= matrix.height; y++) {\n    let length = 0;\n    let lastBit = false;\n    let scans = [0, 0, 0, 0, 0];\n\n    for (let x = -1; x <= matrix.width; x++) {\n      const v = matrix.get(x, y);\n      if (v === lastBit) {\n        length++;\n      } else {\n        scans = [scans[1], scans[2], scans[3], scans[4], length];\n        length = 1;\n        lastBit = v;\n\n        // Do the last 5 color changes ~ match the expected ratio for a finder pattern? 1:1:3:1:1 of b:w:b:w:b\n        const averageFinderPatternBlocksize = sum(scans) / 7;\n        const validFinderPattern =\n          Math.abs(scans[0] - averageFinderPatternBlocksize) < averageFinderPatternBlocksize &&\n          Math.abs(scans[1] - averageFinderPatternBlocksize) < averageFinderPatternBlocksize &&\n          Math.abs(scans[2] - 3 * averageFinderPatternBlocksize) < 3 * averageFinderPatternBlocksize &&\n          Math.abs(scans[3] - averageFinderPatternBlocksize) < averageFinderPatternBlocksize &&\n          Math.abs(scans[4] - averageFinderPatternBlocksize) < averageFinderPatternBlocksize &&\n          !v; // And make sure the current pixel is white since finder patterns are bordered in white\n\n        // Do the last 3 color changes ~ match the expected ratio for an alignment pattern? 1:1:1 of w:b:w\n        const averageAlignmentPatternBlocksize = sum(scans.slice(-3)) / 3;\n        const validAlignmentPattern =\n          Math.abs(scans[2] - averageAlignmentPatternBlocksize) < averageAlignmentPatternBlocksize &&\n          Math.abs(scans[3] - averageAlignmentPatternBlocksize) < averageAlignmentPatternBlocksize &&\n          Math.abs(scans[4] - averageAlignmentPatternBlocksize) < averageAlignmentPatternBlocksize &&\n          v; // Is the current pixel black since alignment patterns are bordered in black\n\n        if (validFinderPattern) {\n          // Compute the start and end x values of the large center black square\n          const endX = x - scans[3] - scans[4];\n          const startX = endX - scans[2];\n\n          const line = { startX, endX, y };\n          // Is there a quad directly above the current spot? If so, extend it with the new line. Otherwise, create a new quad with\n          // that line as the starting point.\n          const matchingQuads = activeFinderPatternQuads.filter(q =>\n            (startX >= q.bottom.startX && startX <= q.bottom.endX) ||\n            (endX >= q.bottom.startX && startX <= q.bottom.endX) ||\n            (startX <= q.bottom.startX && endX >= q.bottom.endX && (\n              (scans[2] / (q.bottom.endX - q.bottom.startX)) < MAX_QUAD_RATIO &&\n              (scans[2] / (q.bottom.endX - q.bottom.startX)) > MIN_QUAD_RATIO\n            )),\n          );\n          if (matchingQuads.length > 0) {\n            matchingQuads[0].bottom = line;\n          } else {\n            activeFinderPatternQuads.push({ top: line, bottom: line });\n          }\n        }\n        if (validAlignmentPattern) {\n          // Compute the start and end x values of the center black square\n          const endX = x - scans[4];\n          const startX = endX - scans[3];\n\n          const line = { startX, y, endX };\n          // Is there a quad directly above the current spot? If so, extend it with the new line. Otherwise, create a new quad with\n          // that line as the starting point.\n          const matchingQuads = activeAlignmentPatternQuads.filter(q =>\n            (startX >= q.bottom.startX && startX <= q.bottom.endX) ||\n            (endX >= q.bottom.startX && startX <= q.bottom.endX) ||\n            (startX <= q.bottom.startX && endX >= q.bottom.endX && (\n              (scans[2] / (q.bottom.endX - q.bottom.startX)) < MAX_QUAD_RATIO &&\n              (scans[2] / (q.bottom.endX - q.bottom.startX)) > MIN_QUAD_RATIO\n            )),\n          );\n          if (matchingQuads.length > 0) {\n            matchingQuads[0].bottom = line;\n          } else {\n            activeAlignmentPatternQuads.push({ top: line, bottom: line });\n          }\n        }\n      }\n    }\n    finderPatternQuads.push(...activeFinderPatternQuads.filter(q => q.bottom.y !== y && q.bottom.y - q.top.y >= 2));\n    activeFinderPatternQuads = activeFinderPatternQuads.filter(q => q.bottom.y === y);\n\n    alignmentPatternQuads.push(...activeAlignmentPatternQuads.filter(q => q.bottom.y !== y));\n    activeAlignmentPatternQuads = activeAlignmentPatternQuads.filter(q => q.bottom.y === y);\n\n  }\n\n  finderPatternQuads.push(...activeFinderPatternQuads.filter(q => q.bottom.y - q.top.y >= 2));\n  alignmentPatternQuads.push(...activeAlignmentPatternQuads);\n\n  // Refactored from cozmo/jsQR to (hopefully) circumvent an issue in Safari 13+ on both Mac and iOS (also including\n  // iOS Chrome and other Safari iOS derivatives). Safari was very occasionally and apparently not deterministically\n  // throwing a \"RangeError: Array size is not a small enough positive integer.\" exception seemingly within the second\n  // .map of the original code (here the second for-loop). This second .map contained a nested .map call over the same\n  // array instance which was the chained result from previous calls to .map, .filter and .sort which potentially caused\n  // this bug in Safari?\n  // Also see https://github.com/cozmo/jsQR/issues/157 and https://bugs.webkit.org/show_bug.cgi?id=211619#c3\n  const scoredFinderPatternPositions: Array<Point & { size: number, score: number }> = [];\n  for (const quad of finderPatternQuads) {\n    if (quad.bottom.y - quad.top.y < 2) {\n      // All quads must be at least 2px tall since the center square is larger than a block\n      continue;\n    }\n\n    // calculate quad center\n    const x = (quad.top.startX + quad.top.endX + quad.bottom.startX + quad.bottom.endX) / 4;\n    const y = (quad.top.y + quad.bottom.y + 1) / 2;\n    if (!matrix.get(Math.round(x), Math.round(y))) {\n      continue;\n    }\n\n    const lengths = [quad.top.endX - quad.top.startX, quad.bottom.endX - quad.bottom.startX, quad.bottom.y - quad.top.y + 1];\n    const size = sum(lengths) / lengths.length;\n    // Initial scoring of finder pattern quads by looking at their ratios, not taking into account position\n    const score = scorePattern({x: Math.round(x), y: Math.round(y)}, [1, 1, 3, 1, 1], matrix);\n    scoredFinderPatternPositions.push({ score, x, y, size });\n  }\n  if (scoredFinderPatternPositions.length < 3) {\n    // A QR code has 3 finder patterns, therefore we need at least 3 candidates.\n    return null;\n  }\n  scoredFinderPatternPositions.sort((a, b) => a.score - b.score);\n\n  // Now take the top finder pattern options and try to find 2 other options with a similar size.\n  const finderPatternGroups: Array<{ points: [Point, Point, Point], score: number }> = [];\n  for (let i = 0; i < Math.min(scoredFinderPatternPositions.length, MAX_FINDERPATTERNS_TO_SEARCH); ++i) {\n    const point = scoredFinderPatternPositions[i];\n    const otherPoints: typeof scoredFinderPatternPositions = [];\n\n    for (const otherPoint of scoredFinderPatternPositions) {\n      if (otherPoint === point) {\n        continue;\n      }\n      otherPoints.push({\n        ...otherPoint,\n        score: otherPoint.score + ((otherPoint.size - point.size) ** 2) / point.size, // score similarity of sizes\n      });\n    }\n    otherPoints.sort((a, b) => a.score - b.score);\n\n    finderPatternGroups.push({\n      points: [point, otherPoints[0], otherPoints[1]], // note that otherPoints.length >= 2 as scoredFinderPatternPositions.length >= 3\n      score: point.score + otherPoints[0].score + otherPoints[1].score, // total combined score of the three points in the group\n    });\n  }\n  finderPatternGroups.sort((a, b) => a.score - b.score);\n  const bestFinderPatternGroup = finderPatternGroups[0];\n\n  const { topRight, topLeft, bottomLeft } = reorderFinderPatterns(...bestFinderPatternGroup.points);\n  const alignment = findAlignmentPattern(matrix, alignmentPatternQuads, topRight, topLeft, bottomLeft);\n  const result: QRLocation[] = [];\n  if (alignment) {\n    result.push({\n      alignmentPattern: { x: alignment.alignmentPattern.x, y: alignment.alignmentPattern.y },\n      bottomLeft: {x: bottomLeft.x, y: bottomLeft.y },\n      dimension: alignment.dimension,\n      topLeft: {x: topLeft.x, y: topLeft.y },\n      topRight: {x: topRight.x, y: topRight.y },\n    });\n  }\n\n  // We normally use the center of the quads as the location of the tracking points, which is optimal for most cases and will account\n  // for a skew in the image. However, In some cases, a slight skew might not be real and instead be caused by image compression\n  // errors and/or low resolution. For those cases, we'd be better off centering the point exactly in the middle of the black area. We\n  // compute and return the location data for the naively centered points as it is little additional work and allows for multiple\n  // attempts at decoding harder images.\n  const midTopRight = recenterLocation(matrix, topRight);\n  const midTopLeft = recenterLocation(matrix, topLeft);\n  const midBottomLeft = recenterLocation(matrix, bottomLeft);\n  const centeredAlignment = findAlignmentPattern(matrix, alignmentPatternQuads, midTopRight, midTopLeft, midBottomLeft);\n  if (centeredAlignment) {\n    result.push({\n      alignmentPattern: { x: centeredAlignment.alignmentPattern.x, y: centeredAlignment.alignmentPattern.y },\n      bottomLeft: { x: midBottomLeft.x, y: midBottomLeft. y },\n      topLeft: { x: midTopLeft.x, y: midTopLeft. y },\n      topRight: { x: midTopRight.x, y: midTopRight. y },\n      dimension: centeredAlignment.dimension,\n    });\n  }\n\n  if (result.length === 0) {\n    return null;\n  }\n\n  return result;\n}\n\nfunction findAlignmentPattern(matrix: BitMatrix, alignmentPatternQuads: Quad[], topRight: Point, topLeft: Point, bottomLeft: Point) {\n  // Now that we've found the three finder patterns we can determine the blockSize and the size of the QR code.\n  // We'll use these to help find the alignment pattern but also later when we do the extraction.\n  let dimension: number;\n  let moduleSize: number;\n  try {\n    ({ dimension, moduleSize } = computeDimension(topLeft, topRight, bottomLeft, matrix));\n  } catch (e) {\n    return null;\n  }\n\n  // Now find the alignment pattern\n  const bottomRightFinderPattern = { // Best guess at where a bottomRight finder pattern would be\n    x: topRight.x - topLeft.x + bottomLeft.x,\n    y: topRight.y - topLeft.y + bottomLeft.y,\n  };\n  const modulesBetweenFinderPatterns = ((distance(topLeft, bottomLeft) + distance(topLeft, topRight)) / 2 / moduleSize);\n  const correctionToTopLeft = 1 - (3 / modulesBetweenFinderPatterns);\n  const expectedAlignmentPattern = {\n    x: topLeft.x + correctionToTopLeft * (bottomRightFinderPattern.x - topLeft.x),\n    y: topLeft.y + correctionToTopLeft * (bottomRightFinderPattern.y - topLeft.y),\n  };\n\n  const alignmentPatterns = alignmentPatternQuads\n    .map(q => {\n      const x = (q.top.startX + q.top.endX + q.bottom.startX + q.bottom.endX) / 4;\n      const y = (q.top.y + q.bottom.y + 1) / 2;\n      if (!matrix.get(Math.floor(x), Math.floor(y))) {\n        return;\n      }\n\n      const sizeScore = scorePattern({x: Math.floor(x), y: Math.floor(y)}, [1, 1, 1], matrix);\n      const score = sizeScore + distance({x, y}, expectedAlignmentPattern);\n      return { x, y, score };\n    })\n    .filter(v => !!v)\n    .sort((a, b) => a.score - b.score);\n\n  // If there are less than 15 modules between finder patterns it's a version 1 QR code and as such has no alignmemnt pattern\n  // so we can only use our best guess.\n  const alignmentPattern = modulesBetweenFinderPatterns >= 15 && alignmentPatterns.length ? alignmentPatterns[0] : expectedAlignmentPattern;\n\n  return { alignmentPattern, dimension };\n}\n","import {binarize} from \"./binarizer\";\nimport {BitMatrix} from \"./BitMatrix\";\nimport {Chunks} from \"./decoder/decodeData\";\nimport {decode} from \"./decoder/decoder\";\nimport { Version } from \"./decoder/version\";\nimport {extract} from \"./extractor\";\nimport {locate, Point} from \"./locator\";\n\nexport interface QRCode {\n  binaryData: number[];\n  data: string;\n  chunks: Chunks;\n  version: number;\n  location: {\n    topRightCorner: Point;\n    topLeftCorner: Point;\n    bottomRightCorner: Point;\n    bottomLeftCorner: Point;\n\n    topRightFinderPattern: Point;\n    topLeftFinderPattern: Point;\n    bottomLeftFinderPattern: Point;\n\n    bottomRightAlignmentPattern?: Point;\n  };\n  matrix: BitMatrix;\n}\n\nfunction scan(matrix: BitMatrix): QRCode | null {\n  const locations = locate(matrix);\n  if (!locations) {\n    return null;\n  }\n\n  for (const location of locations) {\n    const extracted = extract(matrix, location);\n    const decoded = decode(extracted.matrix);\n    if (decoded) {\n      return {\n        binaryData: decoded.bytes,\n        data: decoded.text,\n        chunks: decoded.chunks,\n        version: decoded.version,\n        location: {\n          topRightCorner: extracted.mappingFunction(location.dimension, 0),\n          topLeftCorner: extracted.mappingFunction(0, 0),\n          bottomRightCorner: extracted.mappingFunction(location.dimension, location.dimension),\n          bottomLeftCorner: extracted.mappingFunction(0, location.dimension),\n\n          topRightFinderPattern: location.topRight,\n          topLeftFinderPattern: location.topLeft,\n          bottomLeftFinderPattern: location.bottomLeft,\n\n          bottomRightAlignmentPattern: location.alignmentPattern,\n        },\n        matrix: extracted.matrix,\n      };\n    }\n  }\n  return null;\n}\n\nexport interface Options {\n  inversionAttempts?: \"dontInvert\" | \"onlyInvert\" | \"attemptBoth\" | \"invertFirst\";\n  greyScaleWeights?: GreyscaleWeights;\n  canOverwriteImage?: boolean;\n}\n\nexport interface GreyscaleWeights {\n  red: number;\n  green: number;\n  blue: number;\n  useIntegerApproximation?: boolean;\n}\n\nconst defaultOptions: Options = {\n  inversionAttempts: \"attemptBoth\",\n  greyScaleWeights: {\n    red: 0.2126,\n    green: 0.7152,\n    blue: 0.0722,\n    useIntegerApproximation: false,\n  },\n  canOverwriteImage: true,\n};\n\nfunction mergeObject(target: any, src: any) {\n  Object.keys(src).forEach(opt => { // Sad implementation of Object.assign since we target es5 not es6\n    target[opt] = src[opt];\n  });\n}\n\nfunction jsQR(data: Uint8ClampedArray, width: number, height: number, providedOptions: Options = {}): QRCode | null {\n  const options = Object.create(null);\n  mergeObject(options, defaultOptions);\n  mergeObject(options, providedOptions);\n\n  const tryInvertedFirst = options.inversionAttempts === \"onlyInvert\" || options.inversionAttempts === \"invertFirst\";\n  const shouldInvert = options.inversionAttempts === \"attemptBoth\" || tryInvertedFirst;\n  const {binarized, inverted} = binarize(data, width, height, shouldInvert, options.greyScaleWeights,\n      options.canOverwriteImage);\n  let result = scan(tryInvertedFirst ? inverted : binarized);\n  if (!result && (options.inversionAttempts === \"attemptBoth\" || options.inversionAttempts === \"invertFirst\")) {\n    result = scan(tryInvertedFirst ? binarized : inverted);\n  }\n  return result;\n}\n\n(jsQR as any).default = jsQR;\nexport default jsQR;\n","// @ts-ignore jsqr-es6 does not provide types currently\nimport jsQR from '../node_modules/jsqr-es6/dist/jsQR.js';\n\ntype GrayscaleWeights = {\n    red: number,\n    green: number,\n    blue: number,\n    useIntegerApproximation: boolean,\n};\n\nlet inversionAttempts: 'dontInvert' | 'onlyInvert' | 'attemptBoth' = 'dontInvert';\nlet grayscaleWeights: GrayscaleWeights = {\n    // weights for quick luma integer approximation (https://en.wikipedia.org/wiki/YUV#Full_swing_for_BT.601)\n    red: 77,\n    green: 150,\n    blue: 29,\n    useIntegerApproximation: true,\n};\n\nself.onmessage = event => {\n    const id = event['data']['id'];\n    const type = event['data']['type'];\n    const data = event['data']['data'];\n\n    switch (type) {\n        case 'decode':\n            decode(data, id);\n            break;\n        case 'grayscaleWeights':\n            setGrayscaleWeights(data);\n            break;\n        case 'inversionMode':\n            setInversionMode(data);\n            break;\n        case 'close':\n            // close after earlier messages in the event loop finished processing\n            self.close();\n            break;\n    }\n};\n\nfunction decode(data: { data: Uint8ClampedArray, width: number, height: number }, requestId: number): void {\n    const rgbaData = data['data'];\n    const width = data['width'];\n    const height = data['height'];\n    const result = jsQR(rgbaData, width, height, {\n        inversionAttempts: inversionAttempts,\n        greyScaleWeights: grayscaleWeights,\n    });\n    if (!result) {\n        (self as unknown as Worker).postMessage({\n            id: requestId,\n            type: 'qrResult',\n            data: null,\n        });\n        return;\n    }\n\n    (self as unknown as Worker).postMessage({\n        id: requestId,\n        type: 'qrResult',\n        data: result.data,\n        // equivalent to cornerPoints of native BarcodeDetector\n        cornerPoints: [\n            result.location.topLeftCorner,\n            result.location.topRightCorner,\n            result.location.bottomRightCorner,\n            result.location.bottomLeftCorner,\n        ],\n    });\n}\n\nfunction setGrayscaleWeights(data: GrayscaleWeights) {\n    // update grayscaleWeights in a closure compiler compatible fashion\n    grayscaleWeights.red = data['red'];\n    grayscaleWeights.green = data['green'];\n    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\ No newline at end of file
diff --git a/require/js/qr-scanner/qr-scanner.min.js b/require/js/qr-scanner/qr-scanner.min.js
index 8ee4377..63eb0a4 100644
--- a/require/js/qr-scanner/qr-scanner.min.js
+++ b/require/js/qr-scanner/qr-scanner.min.js
@@ -1,103 +1,650 @@
 class e {
-    constructor(a, b, c, d, f) {
-        this._legacyCanvasSize = e.DEFAULT_CANVAS_SIZE; this._preferredCamera = "environment"; this._maxScansPerSecond = 25; this._lastScanTimestamp = -1; this._destroyed = this._flashOn = this._paused = this._active = !1; this.$video = a; this.$canvas = document.createElement("canvas"); c && "object" === typeof c ? this._onDecode = b : (c || d || f ? console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future") : console.warn("Note that the type of the scan result passed to onDecode will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."),
-            this._legacyOnDecode = b); b = "object" === typeof c ? c : {}; this._onDecodeError = b.onDecodeError || ("function" === typeof c ? c : this._onDecodeError); this._calculateScanRegion = b.calculateScanRegion || ("function" === typeof d ? d : this._calculateScanRegion); this._preferredCamera = b.preferredCamera || f || this._preferredCamera; this._legacyCanvasSize = "number" === typeof c ? c : "number" === typeof d ? d : this._legacyCanvasSize; this._maxScansPerSecond = b.maxScansPerSecond || this._maxScansPerSecond; this._onPlay = this._onPlay.bind(this); this._onLoadedMetaData =
-                this._onLoadedMetaData.bind(this); this._onVisibilityChange = this._onVisibilityChange.bind(this); this._updateOverlay = this._updateOverlay.bind(this); a.disablePictureInPicture = !0; a.playsInline = !0; a.muted = !0; let h = !1; a.hidden && (a.hidden = !1, h = !0); document.body.contains(a) || (document.body.appendChild(a), h = !0); c = a.parentElement; if (b.highlightScanRegion || b.highlightCodeOutline) {
-                    d = !!b.overlay; this.$overlay = b.overlay || document.createElement("div"); f = this.$overlay.style; f.position = "absolute"; f.display = "none";
-                    f.pointerEvents = "none"; this.$overlay.classList.add("scan-region-highlight"); if (!d && b.highlightScanRegion) {
-                        this.$overlay.innerHTML = '<svg class="scan-region-highlight-svg" viewBox="0 0 238 238" preserveAspectRatio="none" style="position:absolute;width:100%;height:100%;left:0;top:0;fill:none;stroke:#e9b213;stroke-width:4;stroke-linecap:round;stroke-linejoin:round"><path d="M31 2H10a8 8 0 0 0-8 8v21M207 2h21a8 8 0 0 1 8 8v21m0 176v21a8 8 0 0 1-8 8h-21m-176 0H10a8 8 0 0 1-8-8v-21"/></svg>'; try {
-                            this.$overlay.firstElementChild.animate({
-                                transform: ["scale(.98)",
-                                    "scale(1.01)"]
-                            }, { duration: 400, iterations: Infinity, direction: "alternate", easing: "ease-in-out" })
-                        } catch (m) { } c.insertBefore(this.$overlay, this.$video.nextSibling)
-                    } b.highlightCodeOutline && (this.$overlay.insertAdjacentHTML("beforeend", '<svg class="code-outline-highlight" preserveAspectRatio="none" style="display:none;width:100%;height:100%;fill:none;stroke:#e9b213;stroke-width:5;stroke-dasharray:25;stroke-linecap:round;stroke-linejoin:round"><polygon/></svg>'), this.$codeOutlineHighlight = this.$overlay.lastElementChild)
-                } this._scanRegion =
-                    this._calculateScanRegion(a); requestAnimationFrame(() => {
-                        let m = window.getComputedStyle(a); "none" === m.display && (a.style.setProperty("display", "block", "important"), h = !0); "visible" !== m.visibility && (a.style.setProperty("visibility", "visible", "important"), h = !0); h && (console.warn("QrScanner has overwritten the video hiding style to avoid Safari stopping the playback."), a.style.opacity = "0", a.style.width = "0", a.style.height = "0", this.$overlay && this.$overlay.parentElement && this.$overlay.parentElement.removeChild(this.$overlay),
-                            delete this.$overlay, delete this.$codeOutlineHighlight); this.$overlay && this._updateOverlay()
-                    }); a.addEventListener("play", this._onPlay); a.addEventListener("loadedmetadata", this._onLoadedMetaData); document.addEventListener("visibilitychange", this._onVisibilityChange); window.addEventListener("resize", this._updateOverlay); this._qrEnginePromise = e.createQrEngine()
-    } static set WORKER_PATH(a) { console.warn("Setting QrScanner.WORKER_PATH is not required and not supported anymore. Have a look at the README for new setup instructions.") } static async hasCamera() { try { return !!(await e.listCameras(!1)).length } catch (a) { return !1 } } static async listCameras(a =
-        !1) { if (!navigator.mediaDevices) return []; let b = async () => (await navigator.mediaDevices.enumerateDevices()).filter(d => "videoinput" === d.kind), c; try { a && (await b()).every(d => !d.label) && (c = await navigator.mediaDevices.getUserMedia({ audio: !1, video: !0 })) } catch (d) { } try { return (await b()).map((d, f) => ({ id: d.deviceId, label: d.label || (0 === f ? "Default Camera" : `Camera ${f + 1}`) })) } finally { c && (console.warn("Call listCameras after successfully starting a QR scanner to avoid creating a temporary video stream"), e._stopVideoStream(c)) } } async hasFlash() {
-            let a;
-            try { if (this.$video.srcObject) { if (!(this.$video.srcObject instanceof MediaStream)) return !1; a = this.$video.srcObject } else a = (await this._getCameraStream()).stream; return "torch" in a.getVideoTracks()[0].getSettings() } catch (b) { return !1 } finally { a && a !== this.$video.srcObject && (console.warn("Call hasFlash after successfully starting the scanner to avoid creating a temporary video stream"), e._stopVideoStream(a)) }
-        } isFlashOn() { return this._flashOn } async toggleFlash() { this._flashOn ? await this.turnFlashOff() : await this.turnFlashOn() } async turnFlashOn() {
-            if (!this._flashOn &&
-                !this._destroyed && (this._flashOn = !0, this._active && !this._paused)) try { if (!await this.hasFlash()) throw "No flash available"; await this.$video.srcObject.getVideoTracks()[0].applyConstraints({ advanced: [{ torch: !0 }] }) } catch (a) { throw this._flashOn = !1, a; }
-        } async turnFlashOff() { this._flashOn && (this._flashOn = !1, await this._restartVideoStream()) } destroy() {
-            this.$video.removeEventListener("loadedmetadata", this._onLoadedMetaData); this.$video.removeEventListener("play", this._onPlay); document.removeEventListener("visibilitychange",
-                this._onVisibilityChange); window.removeEventListener("resize", this._updateOverlay); this._destroyed = !0; this._flashOn = !1; this.stop(); e._postWorkerMessage(this._qrEnginePromise, "close")
-        } async start() {
-            if (this._destroyed) throw Error("The QR scanner can not be started as it had been destroyed."); if (!this._active || this._paused) if ("https:" !== window.location.protocol && console.warn("The camera stream is only accessible if the page is transferred via https."), this._active = !0, !document.hidden) if (this._paused =
-                !1, this.$video.srcObject) await this.$video.play(); else try { let { stream: a, facingMode: b } = await this._getCameraStream(); !this._active || this._paused ? e._stopVideoStream(a) : (this._setVideoMirror(b), this.$video.srcObject = a, await this.$video.play(), this._flashOn && (this._flashOn = !1, this.turnFlashOn().catch(() => { }))) } catch (a) { if (!this._paused) throw this._active = !1, a; }
-        } stop() { this.pause(); this._active = !1 } async pause(a = !1) {
-            this._paused = !0; if (!this._active) return !0; this.$video.pause(); this.$overlay && (this.$overlay.style.display =
-                "none"); let b = () => { this.$video.srcObject instanceof MediaStream && (e._stopVideoStream(this.$video.srcObject), this.$video.srcObject = null) }; if (a) return b(), !0; await new Promise(c => setTimeout(c, 300)); if (!this._paused) return !1; b(); return !0
-        } async setCamera(a) { a !== this._preferredCamera && (this._preferredCamera = a, await this._restartVideoStream()) } static async scanImage(a, b, c, d, f = !1, h = !1) {
-            let m, n = !1; b && ("scanRegion" in b || "qrEngine" in b || "canvas" in b || "disallowCanvasResizing" in b || "alsoTryWithoutScanRegion" in
-                b || "returnDetailedScanResult" in b) ? (m = b.scanRegion, c = b.qrEngine, d = b.canvas, f = b.disallowCanvasResizing || !1, h = b.alsoTryWithoutScanRegion || !1, n = !0) : b || c || d || f || h ? console.warn("You're using a deprecated api for scanImage which will be removed in the future.") : console.warn("Note that the return type of scanImage will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."); b = !!c; try {
-                    let p, k;[c, p] = await Promise.all([c || e.createQrEngine(), e._loadImage(a)]);
-                    [d, k] = e._drawToCanvas(p, m, d, f); let q; if (c instanceof Worker) {
-                        let g = c; b || e._postWorkerMessageSync(g, "inversionMode", "both"); q = await new Promise((l, v) => {
-                            let w, u, r, y = -1; u = t => { t.data.id === y && (g.removeEventListener("message", u), g.removeEventListener("error", r), clearTimeout(w), null !== t.data.data ? l({ data: t.data.data, cornerPoints: e._convertPoints(t.data.cornerPoints, m) }) : v(e.NO_QR_CODE_FOUND)) }; r = t => {
-                                g.removeEventListener("message", u); g.removeEventListener("error", r); clearTimeout(w); v("Scanner error: " + (t ?
-                                    t.message || t : "Unknown Error"))
-                            }; g.addEventListener("message", u); g.addEventListener("error", r); w = setTimeout(() => r("timeout"), 1E4); let x = k.getImageData(0, 0, d.width, d.height); y = e._postWorkerMessageSync(g, "decode", x, [x.data.buffer])
-                        })
-                    } else q = await Promise.race([new Promise((g, l) => window.setTimeout(() => l("Scanner error: timeout"), 1E4)), (async () => {
-                        try { var [g] = await c.detect(d); if (!g) throw e.NO_QR_CODE_FOUND; return { data: g.rawValue, cornerPoints: e._convertPoints(g.cornerPoints, m) } } catch (l) {
-                            g = l.message || l;
-                            if (/not implemented|service unavailable/.test(g)) return e._disableBarcodeDetector = !0, e.scanImage(a, { scanRegion: m, canvas: d, disallowCanvasResizing: f, alsoTryWithoutScanRegion: h }); throw `Scanner error: ${g}`;
-                        }
-                    })()]); return n ? q : q.data
-                } catch (p) { if (!m || !h) throw p; let k = await e.scanImage(a, { qrEngine: c, canvas: d, disallowCanvasResizing: f }); return n ? k : k.data } finally { b || e._postWorkerMessage(c, "close") }
-        } setGrayscaleWeights(a, b, c, d = !0) {
-            e._postWorkerMessage(this._qrEnginePromise, "grayscaleWeights", {
-                red: a, green: b,
-                blue: c, useIntegerApproximation: d
-            })
-        } setInversionMode(a) { e._postWorkerMessage(this._qrEnginePromise, "inversionMode", a) } static async createQrEngine(a) {
-            a && console.warn("Specifying a worker path is not required and not supported anymore."); a = () => import("./qr-scanner-worker.min.js").then(c => c.createWorker()); if (!(!e._disableBarcodeDetector && "BarcodeDetector" in window && BarcodeDetector.getSupportedFormats && (await BarcodeDetector.getSupportedFormats()).includes("qr_code"))) return a(); let b = navigator.userAgentData;
-            return b && b.brands.some(({ brand: c }) => /Chromium/i.test(c)) && /mac ?OS/i.test(b.platform) && await b.getHighEntropyValues(["architecture", "platformVersion"]).then(({ architecture: c, platformVersion: d }) => /arm/i.test(c || "arm") && 13 <= parseInt(d || "13")).catch(() => !0) ? a() : new BarcodeDetector({ formats: ["qr_code"] })
-        } _onPlay() { this._scanRegion = this._calculateScanRegion(this.$video); this._updateOverlay(); this.$overlay && (this.$overlay.style.display = ""); this._scanFrame() } _onLoadedMetaData() {
-            this._scanRegion = this._calculateScanRegion(this.$video);
-            this._updateOverlay()
-        } _onVisibilityChange() { document.hidden ? this.pause() : this._active && this.start() } _calculateScanRegion(a) { let b = Math.round(2 / 3 * Math.min(a.videoWidth, a.videoHeight)); return { x: Math.round((a.videoWidth - b) / 2), y: Math.round((a.videoHeight - b) / 2), width: b, height: b, downScaledWidth: this._legacyCanvasSize, downScaledHeight: this._legacyCanvasSize } } _updateOverlay() {
-            requestAnimationFrame(() => {
-                if (this.$overlay) {
-                    var a = this.$video, b = a.videoWidth, c = a.videoHeight, d = a.offsetWidth, f = a.offsetHeight, h = a.offsetLeft,
-                    m = a.offsetTop, n = window.getComputedStyle(a), p = n.objectFit, k = b / c, q = d / f; switch (p) { case "none": var g = b; var l = c; break; case "fill": g = d; l = f; break; default: ("cover" === p ? k > q : k < q) ? (l = f, g = l * k) : (g = d, l = g / k), "scale-down" === p && (g = Math.min(g, b), l = Math.min(l, c)) }var [v, w] = n.objectPosition.split(" ").map((r, y) => { const x = parseFloat(r); return r.endsWith("%") ? (y ? f - l : d - g) * x / 100 : x }); n = this._scanRegion.width || b; q = this._scanRegion.height || c; p = this._scanRegion.x || 0; var u = this._scanRegion.y || 0; k = this.$overlay.style; k.width =
-                        `${n / b * g}px`; k.height = `${q / c * l}px`; k.top = `${m + w + u / c * l}px`; c = /scaleX\(-1\)/.test(a.style.transform); k.left = `${h + (c ? d - v - g : v) + (c ? b - p - n : p) / b * g}px`; k.transform = a.style.transform
-                }
-            })
-        } static _convertPoints(a, b) { if (!b) return a; let c = b.x || 0, d = b.y || 0, f = b.width && b.downScaledWidth ? b.width / b.downScaledWidth : 1; b = b.height && b.downScaledHeight ? b.height / b.downScaledHeight : 1; for (let h of a) h.x = h.x * f + c, h.y = h.y * b + d; return a } _scanFrame() {
-            !this._active || this.$video.paused || this.$video.ended || ("requestVideoFrameCallback" in
-                this.$video ? this.$video.requestVideoFrameCallback.bind(this.$video) : requestAnimationFrame)(async () => {
-                    if (!(1 >= this.$video.readyState)) {
-                        var a = Date.now() - this._lastScanTimestamp, b = 1E3 / this._maxScansPerSecond; a < b && await new Promise(d => setTimeout(d, b - a)); this._lastScanTimestamp = Date.now(); try { var c = await e.scanImage(this.$video, { scanRegion: this._scanRegion, qrEngine: this._qrEnginePromise, canvas: this.$canvas }) } catch (d) { if (!this._active) return; this._onDecodeError(d) } !e._disableBarcodeDetector || await this._qrEnginePromise instanceof
-                            Worker || (this._qrEnginePromise = e.createQrEngine()); c ? (this._onDecode ? this._onDecode(c) : this._legacyOnDecode && this._legacyOnDecode(c.data), this.$codeOutlineHighlight && (clearTimeout(this._codeOutlineHighlightRemovalTimeout), this._codeOutlineHighlightRemovalTimeout = void 0, this.$codeOutlineHighlight.setAttribute("viewBox", `${this._scanRegion.x || 0} ` + `${this._scanRegion.y || 0} ` + `${this._scanRegion.width || this.$video.videoWidth} ` + `${this._scanRegion.height || this.$video.videoHeight}`), this.$codeOutlineHighlight.firstElementChild.setAttribute("points",
-                                c.cornerPoints.map(({ x: d, y: f }) => `${d},${f}`).join(" ")), this.$codeOutlineHighlight.style.display = "")) : this.$codeOutlineHighlight && !this._codeOutlineHighlightRemovalTimeout && (this._codeOutlineHighlightRemovalTimeout = setTimeout(() => this.$codeOutlineHighlight.style.display = "none", 100))
-                    } this._scanFrame()
-                })
-        } _onDecodeError(a) { a !== e.NO_QR_CODE_FOUND && console.log(a) } async _getCameraStream() {
-            if (!navigator.mediaDevices) throw "Camera not found."; let a = /^(environment|user)$/.test(this._preferredCamera) ? "facingMode" :
-                "deviceId", b = [{ width: { min: 1024 } }, { width: { min: 768 } }, {}], c = b.map(d => Object.assign({}, d, { [a]: { exact: this._preferredCamera } })); for (let d of [...c, ...b]) try { let f = await navigator.mediaDevices.getUserMedia({ video: d, audio: !1 }), h = this._getFacingMode(f) || (d.facingMode ? this._preferredCamera : "environment" === this._preferredCamera ? "user" : "environment"); return { stream: f, facingMode: h } } catch (f) { } throw "Camera not found.";
-        } async _restartVideoStream() { let a = this._paused; await this.pause(!0) && !a && this._active && await this.start() } static _stopVideoStream(a) {
-            for (let b of a.getTracks()) b.stop(),
-                a.removeTrack(b)
-        } _setVideoMirror(a) { this.$video.style.transform = "scaleX(" + ("user" === a ? -1 : 1) + ")" } _getFacingMode(a) { return (a = a.getVideoTracks()[0]) ? /rear|back|environment/i.test(a.label) ? "environment" : /front|user|face/i.test(a.label) ? "user" : null : null } static _drawToCanvas(a, b, c, d = !1) {
-            c = c || document.createElement("canvas"); let f = b && b.x ? b.x : 0, h = b && b.y ? b.y : 0, m = b && b.width ? b.width : a.videoWidth || a.width, n = b && b.height ? b.height : a.videoHeight || a.height; d || (d = b && b.downScaledWidth ? b.downScaledWidth : m, b = b && b.downScaledHeight ?
-                b.downScaledHeight : n, c.width !== d && (c.width = d), c.height !== b && (c.height = b)); b = c.getContext("2d", { alpha: !1 }); b.imageSmoothingEnabled = !1; b.drawImage(a, f, h, m, n, 0, 0, c.width, c.height); return [c, b]
-        } static async _loadImage(a) {
-            if (a instanceof Image) return await e._awaitImageLoad(a), a; if (a instanceof HTMLVideoElement || a instanceof HTMLCanvasElement || a instanceof SVGImageElement || "OffscreenCanvas" in window && a instanceof OffscreenCanvas || "ImageBitmap" in window && a instanceof ImageBitmap) return a; if (a instanceof
-                File || a instanceof Blob || a instanceof URL || "string" === typeof a) { let b = new Image; b.src = a instanceof File || a instanceof Blob ? URL.createObjectURL(a) : a.toString(); try { return await e._awaitImageLoad(b), b } finally { (a instanceof File || a instanceof Blob) && URL.revokeObjectURL(b.src) } } else throw "Unsupported image type.";
-        } static async _awaitImageLoad(a) {
-            a.complete && 0 !== a.naturalWidth || await new Promise((b, c) => {
-                let d = f => {
-                    a.removeEventListener("load", d); a.removeEventListener("error", d); f instanceof ErrorEvent ?
-                        c("Image load error") : b()
-                }; a.addEventListener("load", d); a.addEventListener("error", d)
-            })
-        } static async _postWorkerMessage(a, b, c, d) { return e._postWorkerMessageSync(await a, b, c, d) } static _postWorkerMessageSync(a, b, c, d) { if (!(a instanceof Worker)) return -1; let f = e._workerMessageId++; a.postMessage({ id: f, type: b, data: c }, d); return f }
-} e.DEFAULT_CANVAS_SIZE = 400; e.NO_QR_CODE_FOUND = "No QR code found"; e._disableBarcodeDetector = !1; e._workerMessageId = 0; export default e
+  constructor(a, b, c, d, f) {
+    this._legacyCanvasSize = e.DEFAULT_CANVAS_SIZE;
+    this._preferredCamera = "environment";
+    this._maxScansPerSecond = 25;
+    this._lastScanTimestamp = -1;
+    this._destroyed = this._flashOn = this._paused = this._active = !1;
+    this.$video = a;
+    this.$canvas = document.createElement("canvas");
+    c && "object" === typeof c
+      ? (this._onDecode = b)
+      : (c || d || f
+          ? console.warn(
+              "You're using a deprecated version of the QrScanner constructor which will be removed in the future"
+            )
+          : console.warn(
+              "Note that the type of the scan result passed to onDecode will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."
+            ),
+        (this._legacyOnDecode = b));
+    b = "object" === typeof c ? c : {};
+    this._onDecodeError =
+      b.onDecodeError || ("function" === typeof c ? c : this._onDecodeError);
+    this._calculateScanRegion =
+      b.calculateScanRegion ||
+      ("function" === typeof d ? d : this._calculateScanRegion);
+    this._preferredCamera = b.preferredCamera || f || this._preferredCamera;
+    this._legacyCanvasSize =
+      "number" === typeof c
+        ? c
+        : "number" === typeof d
+        ? d
+        : this._legacyCanvasSize;
+    this._maxScansPerSecond = b.maxScansPerSecond || this._maxScansPerSecond;
+    this._onPlay = this._onPlay.bind(this);
+    this._onLoadedMetaData = this._onLoadedMetaData.bind(this);
+    this._onVisibilityChange = this._onVisibilityChange.bind(this);
+    this._updateOverlay = this._updateOverlay.bind(this);
+    a.disablePictureInPicture = !0;
+    a.playsInline = !0;
+    a.muted = !0;
+    let h = !1;
+    a.hidden && ((a.hidden = !1), (h = !0));
+    document.body.contains(a) || (document.body.appendChild(a), (h = !0));
+    c = a.parentElement;
+    if (b.highlightScanRegion || b.highlightCodeOutline) {
+      d = !!b.overlay;
+      this.$overlay = b.overlay || document.createElement("div");
+      f = this.$overlay.style;
+      f.position = "absolute";
+      f.display = "none";
+      f.pointerEvents = "none";
+      this.$overlay.classList.add("scan-region-highlight");
+      if (!d && b.highlightScanRegion) {
+        this.$overlay.innerHTML =
+          '<svg class="scan-region-highlight-svg" viewBox="0 0 238 238" preserveAspectRatio="none" style="position:absolute;width:100%;height:100%;left:0;top:0;fill:none;stroke:#e9b213;stroke-width:4;stroke-linecap:round;stroke-linejoin:round"><path d="M31 2H10a8 8 0 0 0-8 8v21M207 2h21a8 8 0 0 1 8 8v21m0 176v21a8 8 0 0 1-8 8h-21m-176 0H10a8 8 0 0 1-8-8v-21"/></svg>';
+        try {
+          this.$overlay.firstElementChild.animate(
+            {
+              transform: ["scale(.98)", "scale(1.01)"],
+            },
+            {
+              duration: 400,
+              iterations: Infinity,
+              direction: "alternate",
+              easing: "ease-in-out",
+            }
+          );
+        } catch (m) {}
+        c.insertBefore(this.$overlay, this.$video.nextSibling);
+      }
+      b.highlightCodeOutline &&
+        (this.$overlay.insertAdjacentHTML(
+          "beforeend",
+          '<svg class="code-outline-highlight" preserveAspectRatio="none" style="display:none;width:100%;height:100%;fill:none;stroke:#e9b213;stroke-width:5;stroke-dasharray:25;stroke-linecap:round;stroke-linejoin:round"><polygon/></svg>'
+        ),
+        (this.$codeOutlineHighlight = this.$overlay.lastElementChild));
+    }
+    this._scanRegion = this._calculateScanRegion(a);
+    requestAnimationFrame(() => {
+      let m = window.getComputedStyle(a);
+      "none" === m.display &&
+        (a.style.setProperty("display", "block", "important"), (h = !0));
+      "visible" !== m.visibility &&
+        (a.style.setProperty("visibility", "visible", "important"), (h = !0));
+      h &&
+        (console.warn(
+          "QrScanner has overwritten the video hiding style to avoid Safari stopping the playback."
+        ),
+        (a.style.opacity = "0"),
+        (a.style.width = "0"),
+        (a.style.height = "0"),
+        this.$overlay &&
+          this.$overlay.parentElement &&
+          this.$overlay.parentElement.removeChild(this.$overlay),
+        delete this.$overlay,
+        delete this.$codeOutlineHighlight);
+      this.$overlay && this._updateOverlay();
+    });
+    a.addEventListener("play", this._onPlay);
+    a.addEventListener("loadedmetadata", this._onLoadedMetaData);
+    document.addEventListener("visibilitychange", this._onVisibilityChange);
+    window.addEventListener("resize", this._updateOverlay);
+    this._qrEnginePromise = e.createQrEngine();
+  }
+  static set WORKER_PATH(a) {
+    console.warn(
+      "Setting QrScanner.WORKER_PATH is not required and not supported anymore. Have a look at the README for new setup instructions."
+    );
+  }
+  static async hasCamera() {
+    try {
+      return !!(await e.listCameras(!1)).length;
+    } catch (a) {
+      return !1;
+    }
+  }
+  static async listCameras(a = !1) {
+    if (!navigator.mediaDevices) return [];
+    let b = async () =>
+        (await navigator.mediaDevices.enumerateDevices()).filter(
+          (d) => "videoinput" === d.kind
+        ),
+      c;
+    try {
+      a &&
+        (await b()).every((d) => !d.label) &&
+        (c = await navigator.mediaDevices.getUserMedia({
+          audio: !1,
+          video: !0,
+        }));
+    } catch (d) {}
+    try {
+      return (await b()).map((d, f) => ({
+        id: d.deviceId,
+        label: d.label || (0 === f ? "Default Camera" : `Camera ${f + 1}`),
+      }));
+    } finally {
+      c &&
+        (console.warn(
+          "Call listCameras after successfully starting a QR scanner to avoid creating a temporary video stream"
+        ),
+        e._stopVideoStream(c));
+    }
+  }
+  async hasFlash() {
+    let a;
+    try {
+      if (this.$video.srcObject) {
+        if (!(this.$video.srcObject instanceof MediaStream)) return !1;
+        a = this.$video.srcObject;
+      } else a = (await this._getCameraStream()).stream;
+      return "torch" in a.getVideoTracks()[0].getSettings();
+    } catch (b) {
+      return !1;
+    } finally {
+      a &&
+        a !== this.$video.srcObject &&
+        (console.warn(
+          "Call hasFlash after successfully starting the scanner to avoid creating a temporary video stream"
+        ),
+        e._stopVideoStream(a));
+    }
+  }
+  isFlashOn() {
+    return this._flashOn;
+  }
+  async toggleFlash() {
+    this._flashOn ? await this.turnFlashOff() : await this.turnFlashOn();
+  }
+  async turnFlashOn() {
+    if (
+      !this._flashOn &&
+      !this._destroyed &&
+      ((this._flashOn = !0), this._active && !this._paused)
+    )
+      try {
+        if (!(await this.hasFlash())) throw "No flash available";
+        await this.$video.srcObject
+          .getVideoTracks()[0]
+          .applyConstraints({ advanced: [{ torch: !0 }] });
+      } catch (a) {
+        throw ((this._flashOn = !1), a);
+      }
+  }
+  async turnFlashOff() {
+    this._flashOn && ((this._flashOn = !1), await this._restartVideoStream());
+  }
+  destroy() {
+    this.$video.removeEventListener("loadedmetadata", this._onLoadedMetaData);
+    this.$video.removeEventListener("play", this._onPlay);
+    document.removeEventListener("visibilitychange", this._onVisibilityChange);
+    window.removeEventListener("resize", this._updateOverlay);
+    this._destroyed = !0;
+    this._flashOn = !1;
+    this.stop();
+    e._postWorkerMessage(this._qrEnginePromise, "close");
+  }
+  async start() {
+    if (this._destroyed)
+      throw Error(
+        "The QR scanner can not be started as it had been destroyed."
+      );
+    if (!this._active || this._paused)
+      if (
+        ("https:" !== window.location.protocol &&
+          console.warn(
+            "The camera stream is only accessible if the page is transferred via https."
+          ),
+        (this._active = !0),
+        !document.hidden)
+      )
+        if (((this._paused = !1), this.$video.srcObject))
+          await this.$video.play();
+        else
+          try {
+            let { stream: a, facingMode: b } = await this._getCameraStream();
+            !this._active || this._paused
+              ? e._stopVideoStream(a)
+              : (this._setVideoMirror(b),
+                (this.$video.srcObject = a),
+                await this.$video.play(),
+                this._flashOn &&
+                  ((this._flashOn = !1), this.turnFlashOn().catch(() => {})));
+          } catch (a) {
+            if (!this._paused) throw ((this._active = !1), a);
+          }
+  }
+  stop() {
+    this.pause();
+    this._active = !1;
+  }
+  async pause(a = !1) {
+    this._paused = !0;
+    if (!this._active) return !0;
+    this.$video.pause();
+    this.$overlay && (this.$overlay.style.display = "none");
+    let b = () => {
+      this.$video.srcObject instanceof MediaStream &&
+        (e._stopVideoStream(this.$video.srcObject),
+        (this.$video.srcObject = null));
+    };
+    if (a) return b(), !0;
+    await new Promise((c) => setTimeout(c, 300));
+    if (!this._paused) return !1;
+    b();
+    return !0;
+  }
+  async setCamera(a) {
+    a !== this._preferredCamera &&
+      ((this._preferredCamera = a), await this._restartVideoStream());
+  }
+  static async scanImage(a, b, c, d, f = !1, h = !1) {
+    let m,
+      n = !1;
+    b &&
+    ("scanRegion" in b ||
+      "qrEngine" in b ||
+      "canvas" in b ||
+      "disallowCanvasResizing" in b ||
+      "alsoTryWithoutScanRegion" in b ||
+      "returnDetailedScanResult" in b)
+      ? ((m = b.scanRegion),
+        (c = b.qrEngine),
+        (d = b.canvas),
+        (f = b.disallowCanvasResizing || !1),
+        (h = b.alsoTryWithoutScanRegion || !1),
+        (n = !0))
+      : b || c || d || f || h
+      ? console.warn(
+          "You're using a deprecated api for scanImage which will be removed in the future."
+        )
+      : console.warn(
+          "Note that the return type of scanImage will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."
+        );
+    b = !!c;
+    try {
+      let p, k;
+      [c, p] = await Promise.all([c || e.createQrEngine(), e._loadImage(a)]);
+      [d, k] = e._drawToCanvas(p, m, d, f);
+      let q;
+      if (c instanceof Worker) {
+        let g = c;
+        b || e._postWorkerMessageSync(g, "inversionMode", "both");
+        q = await new Promise((l, v) => {
+          let w,
+            u,
+            r,
+            y = -1;
+          u = (t) => {
+            t.data.id === y &&
+              (g.removeEventListener("message", u),
+              g.removeEventListener("error", r),
+              clearTimeout(w),
+              null !== t.data.data
+                ? l({
+                    data: t.data.data,
+                    cornerPoints: e._convertPoints(t.data.cornerPoints, m),
+                  })
+                : v(e.NO_QR_CODE_FOUND));
+          };
+          r = (t) => {
+            g.removeEventListener("message", u);
+            g.removeEventListener("error", r);
+            clearTimeout(w);
+            v("Scanner error: " + (t ? t.message || t : "Unknown Error"));
+          };
+          g.addEventListener("message", u);
+          g.addEventListener("error", r);
+          w = setTimeout(() => r("timeout"), 1e4);
+          let x = k.getImageData(0, 0, d.width, d.height);
+          y = e._postWorkerMessageSync(g, "decode", x, [x.data.buffer]);
+        });
+      } else
+        q = await Promise.race([
+          new Promise((g, l) =>
+            window.setTimeout(() => l("Scanner error: timeout"), 1e4)
+          ),
+          (async () => {
+            try {
+              var [g] = await c.detect(d);
+              if (!g) throw e.NO_QR_CODE_FOUND;
+              return {
+                data: g.rawValue,
+                cornerPoints: e._convertPoints(g.cornerPoints, m),
+              };
+            } catch (l) {
+              g = l.message || l;
+              if (/not implemented|service unavailable/.test(g))
+                return (
+                  (e._disableBarcodeDetector = !0),
+                  e.scanImage(a, {
+                    scanRegion: m,
+                    canvas: d,
+                    disallowCanvasResizing: f,
+                    alsoTryWithoutScanRegion: h,
+                  })
+                );
+              throw `Scanner error: ${g}`;
+            }
+          })(),
+        ]);
+      return n ? q : q.data;
+    } catch (p) {
+      if (!m || !h) throw p;
+      let k = await e.scanImage(a, {
+        qrEngine: c,
+        canvas: d,
+        disallowCanvasResizing: f,
+      });
+      return n ? k : k.data;
+    } finally {
+      b || e._postWorkerMessage(c, "close");
+    }
+  }
+  setGrayscaleWeights(a, b, c, d = !0) {
+    e._postWorkerMessage(this._qrEnginePromise, "grayscaleWeights", {
+      red: a,
+      green: b,
+      blue: c,
+      useIntegerApproximation: d,
+    });
+  }
+  setInversionMode(a) {
+    e._postWorkerMessage(this._qrEnginePromise, "inversionMode", a);
+  }
+  static async createQrEngine(a) {
+    a &&
+      console.warn(
+        "Specifying a worker path is not required and not supported anymore."
+      );
+    a = () =>
+      import("./qr-scanner-worker.min.js").then((c) => c.createWorker());
+    if (
+      !(
+        !e._disableBarcodeDetector &&
+        "BarcodeDetector" in window &&
+        BarcodeDetector.getSupportedFormats &&
+        (await BarcodeDetector.getSupportedFormats()).includes("qr_code")
+      )
+    )
+      return a();
+    let b = navigator.userAgentData;
+    return b &&
+      b.brands.some(({ brand: c }) => /Chromium/i.test(c)) &&
+      /mac ?OS/i.test(b.platform) &&
+      (await b
+        .getHighEntropyValues(["architecture", "platformVersion"])
+        .then(
+          ({ architecture: c, platformVersion: d }) =>
+            /arm/i.test(c || "arm") && 13 <= parseInt(d || "13")
+        )
+        .catch(() => !0))
+      ? a()
+      : new BarcodeDetector({ formats: ["qr_code"] });
+  }
+  _onPlay() {
+    this._scanRegion = this._calculateScanRegion(this.$video);
+    this._updateOverlay();
+    this.$overlay && (this.$overlay.style.display = "");
+    this._scanFrame();
+  }
+  _onLoadedMetaData() {
+    this._scanRegion = this._calculateScanRegion(this.$video);
+    this._updateOverlay();
+  }
+  _onVisibilityChange() {
+    document.hidden ? this.pause() : this._active && this.start();
+  }
+  _calculateScanRegion(a) {
+    let b = Math.round((2 / 3) * Math.min(a.videoWidth, a.videoHeight));
+    return {
+      x: Math.round((a.videoWidth - b) / 2),
+      y: Math.round((a.videoHeight - b) / 2),
+      width: b,
+      height: b,
+      downScaledWidth: this._legacyCanvasSize,
+      downScaledHeight: this._legacyCanvasSize,
+    };
+  }
+  _updateOverlay() {
+    requestAnimationFrame(() => {
+      if (this.$overlay) {
+        var a = this.$video,
+          b = a.videoWidth,
+          c = a.videoHeight,
+          d = a.offsetWidth,
+          f = a.offsetHeight,
+          h = a.offsetLeft,
+          m = a.offsetTop,
+          n = window.getComputedStyle(a),
+          p = n.objectFit,
+          k = b / c,
+          q = d / f;
+        switch (p) {
+          case "none":
+            var g = b;
+            var l = c;
+            break;
+          case "fill":
+            g = d;
+            l = f;
+            break;
+          default:
+            ("cover" === p ? k > q : k < q)
+              ? ((l = f), (g = l * k))
+              : ((g = d), (l = g / k)),
+              "scale-down" === p &&
+                ((g = Math.min(g, b)), (l = Math.min(l, c)));
+        }
+        var [v, w] = n.objectPosition.split(" ").map((r, y) => {
+          const x = parseFloat(r);
+          return r.endsWith("%") ? ((y ? f - l : d - g) * x) / 100 : x;
+        });
+        n = this._scanRegion.width || b;
+        q = this._scanRegion.height || c;
+        p = this._scanRegion.x || 0;
+        var u = this._scanRegion.y || 0;
+        k = this.$overlay.style;
+        k.width = `${(n / b) * g}px`;
+        k.height = `${(q / c) * l}px`;
+        k.top = `${m + w + (u / c) * l}px`;
+        c = /scaleX\(-1\)/.test(a.style.transform);
+        k.left = `${h + (c ? d - v - g : v) + ((c ? b - p - n : p) / b) * g}px`;
+        k.transform = a.style.transform;
+      }
+    });
+  }
+  static _convertPoints(a, b) {
+    if (!b) return a;
+    let c = b.x || 0,
+      d = b.y || 0,
+      f = b.width && b.downScaledWidth ? b.width / b.downScaledWidth : 1;
+    b = b.height && b.downScaledHeight ? b.height / b.downScaledHeight : 1;
+    for (let h of a) (h.x = h.x * f + c), (h.y = h.y * b + d);
+    return a;
+  }
+  _scanFrame() {
+    !this._active ||
+      this.$video.paused ||
+      this.$video.ended ||
+      ("requestVideoFrameCallback" in this.$video
+        ? this.$video.requestVideoFrameCallback.bind(this.$video)
+        : requestAnimationFrame)(async () => {
+        if (!(1 >= this.$video.readyState)) {
+          var a = Date.now() - this._lastScanTimestamp,
+            b = 1e3 / this._maxScansPerSecond;
+          a < b && (await new Promise((d) => setTimeout(d, b - a)));
+          this._lastScanTimestamp = Date.now();
+          try {
+            var c = await e.scanImage(this.$video, {
+              scanRegion: this._scanRegion,
+              qrEngine: this._qrEnginePromise,
+              canvas: this.$canvas,
+            });
+          } catch (d) {
+            if (!this._active) return;
+            this._onDecodeError(d);
+          }
+          !e._disableBarcodeDetector ||
+            (await this._qrEnginePromise) instanceof Worker ||
+            (this._qrEnginePromise = e.createQrEngine());
+          c
+            ? (this._onDecode
+                ? this._onDecode(c)
+                : this._legacyOnDecode && this._legacyOnDecode(c.data),
+              this.$codeOutlineHighlight &&
+                (clearTimeout(this._codeOutlineHighlightRemovalTimeout),
+                (this._codeOutlineHighlightRemovalTimeout = void 0),
+                this.$codeOutlineHighlight.setAttribute(
+                  "viewBox",
+                  `${this._scanRegion.x || 0} ` +
+                    `${this._scanRegion.y || 0} ` +
+                    `${this._scanRegion.width || this.$video.videoWidth} ` +
+                    `${this._scanRegion.height || this.$video.videoHeight}`
+                ),
+                this.$codeOutlineHighlight.firstElementChild.setAttribute(
+                  "points",
+                  c.cornerPoints.map(({ x: d, y: f }) => `${d},${f}`).join(" ")
+                ),
+                (this.$codeOutlineHighlight.style.display = "")))
+            : this.$codeOutlineHighlight &&
+              !this._codeOutlineHighlightRemovalTimeout &&
+              (this._codeOutlineHighlightRemovalTimeout = setTimeout(
+                () => (this.$codeOutlineHighlight.style.display = "none"),
+                100
+              ));
+        }
+        this._scanFrame();
+      });
+  }
+  _onDecodeError(a) {
+    a !== e.NO_QR_CODE_FOUND && console.log(a);
+  }
+  async _getCameraStream() {
+    if (!navigator.mediaDevices) throw "Camera not found.";
+    let a = /^(environment|user)$/.test(this._preferredCamera)
+        ? "facingMode"
+        : "deviceId",
+      b = [{ width: { min: 1024 } }, { width: { min: 768 } }, {}],
+      c = b.map((d) =>
+        Object.assign({}, d, { [a]: { exact: this._preferredCamera } })
+      );
+    for (let d of [...c, ...b])
+      try {
+        let f = await navigator.mediaDevices.getUserMedia({
+            video: d,
+            audio: !1,
+          }),
+          h =
+            this._getFacingMode(f) ||
+            (d.facingMode
+              ? this._preferredCamera
+              : "environment" === this._preferredCamera
+              ? "user"
+              : "environment");
+        return { stream: f, facingMode: h };
+      } catch (f) {}
+    throw "Camera not found.";
+  }
+  async _restartVideoStream() {
+    let a = this._paused;
+    (await this.pause(!0)) && !a && this._active && (await this.start());
+  }
+  static _stopVideoStream(a) {
+    for (let b of a.getTracks()) b.stop(), a.removeTrack(b);
+  }
+  _setVideoMirror(a) {
+    this.$video.style.transform = "scaleX(" + ("user" === a ? -1 : 1) + ")";
+  }
+  _getFacingMode(a) {
+    return (a = a.getVideoTracks()[0])
+      ? /rear|back|environment/i.test(a.label)
+        ? "environment"
+        : /front|user|face/i.test(a.label)
+        ? "user"
+        : null
+      : null;
+  }
+  static _drawToCanvas(a, b, c, d = !1) {
+    c = c || document.createElement("canvas");
+    let f = b && b.x ? b.x : 0,
+      h = b && b.y ? b.y : 0,
+      m = b && b.width ? b.width : a.videoWidth || a.width,
+      n = b && b.height ? b.height : a.videoHeight || a.height;
+    d ||
+      ((d = b && b.downScaledWidth ? b.downScaledWidth : m),
+      (b = b && b.downScaledHeight ? b.downScaledHeight : n),
+      c.width !== d && (c.width = d),
+      c.height !== b && (c.height = b));
+    b = c.getContext("2d", { alpha: !1 });
+    b.imageSmoothingEnabled = !1;
+    b.drawImage(a, f, h, m, n, 0, 0, c.width, c.height);
+    return [c, b];
+  }
+  static async _loadImage(a) {
+    if (a instanceof Image) return await e._awaitImageLoad(a), a;
+    if (
+      a instanceof HTMLVideoElement ||
+      a instanceof HTMLCanvasElement ||
+      a instanceof SVGImageElement ||
+      ("OffscreenCanvas" in window && a instanceof OffscreenCanvas) ||
+      ("ImageBitmap" in window && a instanceof ImageBitmap)
+    )
+      return a;
+    if (
+      a instanceof File ||
+      a instanceof Blob ||
+      a instanceof URL ||
+      "string" === typeof a
+    ) {
+      let b = new Image();
+      b.src =
+        a instanceof File || a instanceof Blob
+          ? URL.createObjectURL(a)
+          : a.toString();
+      try {
+        return await e._awaitImageLoad(b), b;
+      } finally {
+        (a instanceof File || a instanceof Blob) && URL.revokeObjectURL(b.src);
+      }
+    } else throw "Unsupported image type.";
+  }
+  static async _awaitImageLoad(a) {
+    (a.complete && 0 !== a.naturalWidth) ||
+      (await new Promise((b, c) => {
+        let d = (f) => {
+          a.removeEventListener("load", d);
+          a.removeEventListener("error", d);
+          f instanceof ErrorEvent ? c("Image load error") : b();
+        };
+        a.addEventListener("load", d);
+        a.addEventListener("error", d);
+      }));
+  }
+  static async _postWorkerMessage(a, b, c, d) {
+    return e._postWorkerMessageSync(await a, b, c, d);
+  }
+  static _postWorkerMessageSync(a, b, c, d) {
+    if (!(a instanceof Worker)) return -1;
+    let f = e._workerMessageId++;
+    a.postMessage({ id: f, type: b, data: c }, d);
+    return f;
+  }
+}
+e.DEFAULT_CANVAS_SIZE = 400;
+e.NO_QR_CODE_FOUND = "No QR code found";
+e._disableBarcodeDetector = !1;
+e._workerMessageId = 0;
+export default e;
 //# sourceMappingURL=qr-scanner.min.js.map
diff --git a/require/js/qr-scanner/qr-scanner.umd.min.js b/require/js/qr-scanner/qr-scanner.umd.min.js
index 6465df1..e3b2997 100644
--- a/require/js/qr-scanner/qr-scanner.umd.min.js
+++ b/require/js/qr-scanner/qr-scanner.umd.min.js
@@ -1,101 +1,666 @@
-'use strict'; (function (e, a) { "object" === typeof exports && "undefined" !== typeof module ? module.exports = a() : "function" === typeof define && define.amd ? define(a) : (e = "undefined" !== typeof globalThis ? globalThis : e || self, e.QrScanner = a()) })(this, function () {
-    class e {
-        constructor(a, b, c, d, f) {
-            this._legacyCanvasSize = e.DEFAULT_CANVAS_SIZE; this._preferredCamera = "environment"; this._maxScansPerSecond = 25; this._lastScanTimestamp = -1; this._destroyed = this._flashOn = this._paused = this._active = !1; this.$video = a; this.$canvas = document.createElement("canvas");
-            c && "object" === typeof c ? this._onDecode = b : (c || d || f ? console.warn("You're using a deprecated version of the QrScanner constructor which will be removed in the future") : console.warn("Note that the type of the scan result passed to onDecode will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."), this._legacyOnDecode = b); b = "object" === typeof c ? c : {}; this._onDecodeError = b.onDecodeError || ("function" === typeof c ? c : this._onDecodeError); this._calculateScanRegion =
-                b.calculateScanRegion || ("function" === typeof d ? d : this._calculateScanRegion); this._preferredCamera = b.preferredCamera || f || this._preferredCamera; this._legacyCanvasSize = "number" === typeof c ? c : "number" === typeof d ? d : this._legacyCanvasSize; this._maxScansPerSecond = b.maxScansPerSecond || this._maxScansPerSecond; this._onPlay = this._onPlay.bind(this); this._onLoadedMetaData = this._onLoadedMetaData.bind(this); this._onVisibilityChange = this._onVisibilityChange.bind(this); this._updateOverlay = this._updateOverlay.bind(this);
-            a.disablePictureInPicture = !0; a.playsInline = !0; a.muted = !0; let h = !1; a.hidden && (a.hidden = !1, h = !0); document.body.contains(a) || (document.body.appendChild(a), h = !0); c = a.parentElement; if (b.highlightScanRegion || b.highlightCodeOutline) {
-                d = !!b.overlay; this.$overlay = b.overlay || document.createElement("div"); f = this.$overlay.style; f.position = "absolute"; f.display = "none"; f.pointerEvents = "none"; this.$overlay.classList.add("scan-region-highlight"); if (!d && b.highlightScanRegion) {
-                    this.$overlay.innerHTML = '<svg class="scan-region-highlight-svg" viewBox="0 0 238 238" preserveAspectRatio="none" style="position:absolute;width:100%;height:100%;left:0;top:0;fill:none;stroke:#e9b213;stroke-width:4;stroke-linecap:round;stroke-linejoin:round"><path d="M31 2H10a8 8 0 0 0-8 8v21M207 2h21a8 8 0 0 1 8 8v21m0 176v21a8 8 0 0 1-8 8h-21m-176 0H10a8 8 0 0 1-8-8v-21"/></svg>';
-                    try { this.$overlay.firstElementChild.animate({ transform: ["scale(.98)", "scale(1.01)"] }, { duration: 400, iterations: Infinity, direction: "alternate", easing: "ease-in-out" }) } catch (m) { } c.insertBefore(this.$overlay, this.$video.nextSibling)
-                } b.highlightCodeOutline && (this.$overlay.insertAdjacentHTML("beforeend", '<svg class="code-outline-highlight" preserveAspectRatio="none" style="display:none;width:100%;height:100%;fill:none;stroke:#e9b213;stroke-width:5;stroke-dasharray:25;stroke-linecap:round;stroke-linejoin:round"><polygon/></svg>'),
-                    this.$codeOutlineHighlight = this.$overlay.lastElementChild)
-            } this._scanRegion = this._calculateScanRegion(a); requestAnimationFrame(() => {
-                let m = window.getComputedStyle(a); "none" === m.display && (a.style.setProperty("display", "block", "important"), h = !0); "visible" !== m.visibility && (a.style.setProperty("visibility", "visible", "important"), h = !0); h && (console.warn("QrScanner has overwritten the video hiding style to avoid Safari stopping the playback."), a.style.opacity = "0", a.style.width = "0", a.style.height = "0", this.$overlay &&
-                    this.$overlay.parentElement && this.$overlay.parentElement.removeChild(this.$overlay), delete this.$overlay, delete this.$codeOutlineHighlight); this.$overlay && this._updateOverlay()
-            }); a.addEventListener("play", this._onPlay); a.addEventListener("loadedmetadata", this._onLoadedMetaData); document.addEventListener("visibilitychange", this._onVisibilityChange); window.addEventListener("resize", this._updateOverlay); this._qrEnginePromise = e.createQrEngine()
-        } static set WORKER_PATH(a) { console.warn("Setting QrScanner.WORKER_PATH is not required and not supported anymore. Have a look at the README for new setup instructions.") } static async hasCamera() { try { return !!(await e.listCameras(!1)).length } catch (a) { return !1 } } static async listCameras(a =
-            !1) { if (!navigator.mediaDevices) return []; let b = async () => (await navigator.mediaDevices.enumerateDevices()).filter(d => "videoinput" === d.kind), c; try { a && (await b()).every(d => !d.label) && (c = await navigator.mediaDevices.getUserMedia({ audio: !1, video: !0 })) } catch (d) { } try { return (await b()).map((d, f) => ({ id: d.deviceId, label: d.label || (0 === f ? "Default Camera" : `Camera ${f + 1}`) })) } finally { c && (console.warn("Call listCameras after successfully starting a QR scanner to avoid creating a temporary video stream"), e._stopVideoStream(c)) } } async hasFlash() {
-                let a;
-                try { if (this.$video.srcObject) { if (!(this.$video.srcObject instanceof MediaStream)) return !1; a = this.$video.srcObject } else a = (await this._getCameraStream()).stream; return "torch" in a.getVideoTracks()[0].getSettings() } catch (b) { return !1 } finally { a && a !== this.$video.srcObject && (console.warn("Call hasFlash after successfully starting the scanner to avoid creating a temporary video stream"), e._stopVideoStream(a)) }
-            } isFlashOn() { return this._flashOn } async toggleFlash() { this._flashOn ? await this.turnFlashOff() : await this.turnFlashOn() } async turnFlashOn() {
-                if (!this._flashOn &&
-                    !this._destroyed && (this._flashOn = !0, this._active && !this._paused)) try { if (!await this.hasFlash()) throw "No flash available"; await this.$video.srcObject.getVideoTracks()[0].applyConstraints({ advanced: [{ torch: !0 }] }) } catch (a) { throw this._flashOn = !1, a; }
-            } async turnFlashOff() { this._flashOn && (this._flashOn = !1, await this._restartVideoStream()) } destroy() {
-                this.$video.removeEventListener("loadedmetadata", this._onLoadedMetaData); this.$video.removeEventListener("play", this._onPlay); document.removeEventListener("visibilitychange",
-                    this._onVisibilityChange); window.removeEventListener("resize", this._updateOverlay); this._destroyed = !0; this._flashOn = !1; this.stop(); e._postWorkerMessage(this._qrEnginePromise, "close")
-            } async start() {
-                if (this._destroyed) throw Error("The QR scanner can not be started as it had been destroyed."); if (!this._active || this._paused) if ("https:" !== window.location.protocol && console.warn("The camera stream is only accessible if the page is transferred via https."), this._active = !0, !document.hidden) if (this._paused =
-                    !1, this.$video.srcObject) await this.$video.play(); else try { let { stream: a, facingMode: b } = await this._getCameraStream(); !this._active || this._paused ? e._stopVideoStream(a) : (this._setVideoMirror(b), this.$video.srcObject = a, await this.$video.play(), this._flashOn && (this._flashOn = !1, this.turnFlashOn().catch(() => { }))) } catch (a) { if (!this._paused) throw this._active = !1, a; }
-            } stop() { this.pause(); this._active = !1 } async pause(a = !1) {
-                this._paused = !0; if (!this._active) return !0; this.$video.pause(); this.$overlay && (this.$overlay.style.display =
-                    "none"); let b = () => { this.$video.srcObject instanceof MediaStream && (e._stopVideoStream(this.$video.srcObject), this.$video.srcObject = null) }; if (a) return b(), !0; await new Promise(c => setTimeout(c, 300)); if (!this._paused) return !1; b(); return !0
-            } async setCamera(a) { a !== this._preferredCamera && (this._preferredCamera = a, await this._restartVideoStream()) } static async scanImage(a, b, c, d, f = !1, h = !1) {
-                let m, n = !1; b && ("scanRegion" in b || "qrEngine" in b || "canvas" in b || "disallowCanvasResizing" in b || "alsoTryWithoutScanRegion" in
-                    b || "returnDetailedScanResult" in b) ? (m = b.scanRegion, c = b.qrEngine, d = b.canvas, f = b.disallowCanvasResizing || !1, h = b.alsoTryWithoutScanRegion || !1, n = !0) : b || c || d || f || h ? console.warn("You're using a deprecated api for scanImage which will be removed in the future.") : console.warn("Note that the return type of scanImage will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."); b = !!c; try {
-                        let p, k;[c, p] = await Promise.all([c || e.createQrEngine(), e._loadImage(a)]);
-                        [d, k] = e._drawToCanvas(p, m, d, f); let q; if (c instanceof Worker) {
-                            let g = c; b || e._postWorkerMessageSync(g, "inversionMode", "both"); q = await new Promise((l, v) => {
-                                let w, u, r, y = -1; u = t => { t.data.id === y && (g.removeEventListener("message", u), g.removeEventListener("error", r), clearTimeout(w), null !== t.data.data ? l({ data: t.data.data, cornerPoints: e._convertPoints(t.data.cornerPoints, m) }) : v(e.NO_QR_CODE_FOUND)) }; r = t => {
-                                    g.removeEventListener("message", u); g.removeEventListener("error", r); clearTimeout(w); v("Scanner error: " + (t ?
-                                        t.message || t : "Unknown Error"))
-                                }; g.addEventListener("message", u); g.addEventListener("error", r); w = setTimeout(() => r("timeout"), 1E4); let x = k.getImageData(0, 0, d.width, d.height); y = e._postWorkerMessageSync(g, "decode", x, [x.data.buffer])
-                            })
-                        } else q = await Promise.race([new Promise((g, l) => window.setTimeout(() => l("Scanner error: timeout"), 1E4)), (async () => {
-                            try { var [g] = await c.detect(d); if (!g) throw e.NO_QR_CODE_FOUND; return { data: g.rawValue, cornerPoints: e._convertPoints(g.cornerPoints, m) } } catch (l) {
-                                g = l.message || l;
-                                if (/not implemented|service unavailable/.test(g)) return e._disableBarcodeDetector = !0, e.scanImage(a, { scanRegion: m, canvas: d, disallowCanvasResizing: f, alsoTryWithoutScanRegion: h }); throw `Scanner error: ${g}`;
-                            }
-                        })()]); return n ? q : q.data
-                    } catch (p) { if (!m || !h) throw p; let k = await e.scanImage(a, { qrEngine: c, canvas: d, disallowCanvasResizing: f }); return n ? k : k.data } finally { b || e._postWorkerMessage(c, "close") }
-            } setGrayscaleWeights(a, b, c, d = !0) {
-                e._postWorkerMessage(this._qrEnginePromise, "grayscaleWeights", {
-                    red: a, green: b,
-                    blue: c, useIntegerApproximation: d
-                })
-            } setInversionMode(a) { e._postWorkerMessage(this._qrEnginePromise, "inversionMode", a) } static async createQrEngine(a) {
-                a && console.warn("Specifying a worker path is not required and not supported anymore."); a = () => import("./qr-scanner-worker.min.js").then(c => c.createWorker()); if (!(!e._disableBarcodeDetector && "BarcodeDetector" in window && BarcodeDetector.getSupportedFormats && (await BarcodeDetector.getSupportedFormats()).includes("qr_code"))) return a(); let b = navigator.userAgentData;
-                return b && b.brands.some(({ brand: c }) => /Chromium/i.test(c)) && /mac ?OS/i.test(b.platform) && await b.getHighEntropyValues(["architecture", "platformVersion"]).then(({ architecture: c, platformVersion: d }) => /arm/i.test(c || "arm") && 13 <= parseInt(d || "13")).catch(() => !0) ? a() : new BarcodeDetector({ formats: ["qr_code"] })
-            } _onPlay() { this._scanRegion = this._calculateScanRegion(this.$video); this._updateOverlay(); this.$overlay && (this.$overlay.style.display = ""); this._scanFrame() } _onLoadedMetaData() {
-                this._scanRegion = this._calculateScanRegion(this.$video);
-                this._updateOverlay()
-            } _onVisibilityChange() { document.hidden ? this.pause() : this._active && this.start() } _calculateScanRegion(a) { let b = Math.round(2 / 3 * Math.min(a.videoWidth, a.videoHeight)); return { x: Math.round((a.videoWidth - b) / 2), y: Math.round((a.videoHeight - b) / 2), width: b, height: b, downScaledWidth: this._legacyCanvasSize, downScaledHeight: this._legacyCanvasSize } } _updateOverlay() {
-                requestAnimationFrame(() => {
-                    if (this.$overlay) {
-                        var a = this.$video, b = a.videoWidth, c = a.videoHeight, d = a.offsetWidth, f = a.offsetHeight, h = a.offsetLeft,
-                        m = a.offsetTop, n = window.getComputedStyle(a), p = n.objectFit, k = b / c, q = d / f; switch (p) { case "none": var g = b; var l = c; break; case "fill": g = d; l = f; break; default: ("cover" === p ? k > q : k < q) ? (l = f, g = l * k) : (g = d, l = g / k), "scale-down" === p && (g = Math.min(g, b), l = Math.min(l, c)) }var [v, w] = n.objectPosition.split(" ").map((r, y) => { const x = parseFloat(r); return r.endsWith("%") ? (y ? f - l : d - g) * x / 100 : x }); n = this._scanRegion.width || b; q = this._scanRegion.height || c; p = this._scanRegion.x || 0; var u = this._scanRegion.y || 0; k = this.$overlay.style; k.width =
-                            `${n / b * g}px`; k.height = `${q / c * l}px`; k.top = `${m + w + u / c * l}px`; c = /scaleX\(-1\)/.test(a.style.transform); k.left = `${h + (c ? d - v - g : v) + (c ? b - p - n : p) / b * g}px`; k.transform = a.style.transform
-                    }
-                })
-            } static _convertPoints(a, b) { if (!b) return a; let c = b.x || 0, d = b.y || 0, f = b.width && b.downScaledWidth ? b.width / b.downScaledWidth : 1; b = b.height && b.downScaledHeight ? b.height / b.downScaledHeight : 1; for (let h of a) h.x = h.x * f + c, h.y = h.y * b + d; return a } _scanFrame() {
-                !this._active || this.$video.paused || this.$video.ended || ("requestVideoFrameCallback" in
-                    this.$video ? this.$video.requestVideoFrameCallback.bind(this.$video) : requestAnimationFrame)(async () => {
-                        if (!(1 >= this.$video.readyState)) {
-                            var a = Date.now() - this._lastScanTimestamp, b = 1E3 / this._maxScansPerSecond; a < b && await new Promise(d => setTimeout(d, b - a)); this._lastScanTimestamp = Date.now(); try { var c = await e.scanImage(this.$video, { scanRegion: this._scanRegion, qrEngine: this._qrEnginePromise, canvas: this.$canvas }) } catch (d) { if (!this._active) return; this._onDecodeError(d) } !e._disableBarcodeDetector || await this._qrEnginePromise instanceof
-                                Worker || (this._qrEnginePromise = e.createQrEngine()); c ? (this._onDecode ? this._onDecode(c) : this._legacyOnDecode && this._legacyOnDecode(c.data), this.$codeOutlineHighlight && (clearTimeout(this._codeOutlineHighlightRemovalTimeout), this._codeOutlineHighlightRemovalTimeout = void 0, this.$codeOutlineHighlight.setAttribute("viewBox", `${this._scanRegion.x || 0} ` + `${this._scanRegion.y || 0} ` + `${this._scanRegion.width || this.$video.videoWidth} ` + `${this._scanRegion.height || this.$video.videoHeight}`), this.$codeOutlineHighlight.firstElementChild.setAttribute("points",
-                                    c.cornerPoints.map(({ x: d, y: f }) => `${d},${f}`).join(" ")), this.$codeOutlineHighlight.style.display = "")) : this.$codeOutlineHighlight && !this._codeOutlineHighlightRemovalTimeout && (this._codeOutlineHighlightRemovalTimeout = setTimeout(() => this.$codeOutlineHighlight.style.display = "none", 100))
-                        } this._scanFrame()
+"use strict";
+(function (e, a) {
+  "object" === typeof exports && "undefined" !== typeof module
+    ? (module.exports = a())
+    : "function" === typeof define && define.amd
+    ? define(a)
+    : ((e = "undefined" !== typeof globalThis ? globalThis : e || self),
+      (e.QrScanner = a()));
+})(this, function () {
+  class e {
+    constructor(a, b, c, d, f) {
+      this._legacyCanvasSize = e.DEFAULT_CANVAS_SIZE;
+      this._preferredCamera = "environment";
+      this._maxScansPerSecond = 25;
+      this._lastScanTimestamp = -1;
+      this._destroyed = this._flashOn = this._paused = this._active = !1;
+      this.$video = a;
+      this.$canvas = document.createElement("canvas");
+      c && "object" === typeof c
+        ? (this._onDecode = b)
+        : (c || d || f
+            ? console.warn(
+                "You're using a deprecated version of the QrScanner constructor which will be removed in the future"
+              )
+            : console.warn(
+                "Note that the type of the scan result passed to onDecode will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."
+              ),
+          (this._legacyOnDecode = b));
+      b = "object" === typeof c ? c : {};
+      this._onDecodeError =
+        b.onDecodeError || ("function" === typeof c ? c : this._onDecodeError);
+      this._calculateScanRegion =
+        b.calculateScanRegion ||
+        ("function" === typeof d ? d : this._calculateScanRegion);
+      this._preferredCamera = b.preferredCamera || f || this._preferredCamera;
+      this._legacyCanvasSize =
+        "number" === typeof c
+          ? c
+          : "number" === typeof d
+          ? d
+          : this._legacyCanvasSize;
+      this._maxScansPerSecond = b.maxScansPerSecond || this._maxScansPerSecond;
+      this._onPlay = this._onPlay.bind(this);
+      this._onLoadedMetaData = this._onLoadedMetaData.bind(this);
+      this._onVisibilityChange = this._onVisibilityChange.bind(this);
+      this._updateOverlay = this._updateOverlay.bind(this);
+      a.disablePictureInPicture = !0;
+      a.playsInline = !0;
+      a.muted = !0;
+      let h = !1;
+      a.hidden && ((a.hidden = !1), (h = !0));
+      document.body.contains(a) || (document.body.appendChild(a), (h = !0));
+      c = a.parentElement;
+      if (b.highlightScanRegion || b.highlightCodeOutline) {
+        d = !!b.overlay;
+        this.$overlay = b.overlay || document.createElement("div");
+        f = this.$overlay.style;
+        f.position = "absolute";
+        f.display = "none";
+        f.pointerEvents = "none";
+        this.$overlay.classList.add("scan-region-highlight");
+        if (!d && b.highlightScanRegion) {
+          this.$overlay.innerHTML =
+            '<svg class="scan-region-highlight-svg" viewBox="0 0 238 238" preserveAspectRatio="none" style="position:absolute;width:100%;height:100%;left:0;top:0;fill:none;stroke:#e9b213;stroke-width:4;stroke-linecap:round;stroke-linejoin:round"><path d="M31 2H10a8 8 0 0 0-8 8v21M207 2h21a8 8 0 0 1 8 8v21m0 176v21a8 8 0 0 1-8 8h-21m-176 0H10a8 8 0 0 1-8-8v-21"/></svg>';
+          try {
+            this.$overlay.firstElementChild.animate(
+              { transform: ["scale(.98)", "scale(1.01)"] },
+              {
+                duration: 400,
+                iterations: Infinity,
+                direction: "alternate",
+                easing: "ease-in-out",
+              }
+            );
+          } catch (m) {}
+          c.insertBefore(this.$overlay, this.$video.nextSibling);
+        }
+        b.highlightCodeOutline &&
+          (this.$overlay.insertAdjacentHTML(
+            "beforeend",
+            '<svg class="code-outline-highlight" preserveAspectRatio="none" style="display:none;width:100%;height:100%;fill:none;stroke:#e9b213;stroke-width:5;stroke-dasharray:25;stroke-linecap:round;stroke-linejoin:round"><polygon/></svg>'
+          ),
+          (this.$codeOutlineHighlight = this.$overlay.lastElementChild));
+      }
+      this._scanRegion = this._calculateScanRegion(a);
+      requestAnimationFrame(() => {
+        let m = window.getComputedStyle(a);
+        "none" === m.display &&
+          (a.style.setProperty("display", "block", "important"), (h = !0));
+        "visible" !== m.visibility &&
+          (a.style.setProperty("visibility", "visible", "important"), (h = !0));
+        h &&
+          (console.warn(
+            "QrScanner has overwritten the video hiding style to avoid Safari stopping the playback."
+          ),
+          (a.style.opacity = "0"),
+          (a.style.width = "0"),
+          (a.style.height = "0"),
+          this.$overlay &&
+            this.$overlay.parentElement &&
+            this.$overlay.parentElement.removeChild(this.$overlay),
+          delete this.$overlay,
+          delete this.$codeOutlineHighlight);
+        this.$overlay && this._updateOverlay();
+      });
+      a.addEventListener("play", this._onPlay);
+      a.addEventListener("loadedmetadata", this._onLoadedMetaData);
+      document.addEventListener("visibilitychange", this._onVisibilityChange);
+      window.addEventListener("resize", this._updateOverlay);
+      this._qrEnginePromise = e.createQrEngine();
+    }
+    static set WORKER_PATH(a) {
+      console.warn(
+        "Setting QrScanner.WORKER_PATH is not required and not supported anymore. Have a look at the README for new setup instructions."
+      );
+    }
+    static async hasCamera() {
+      try {
+        return !!(await e.listCameras(!1)).length;
+      } catch (a) {
+        return !1;
+      }
+    }
+    static async listCameras(a = !1) {
+      if (!navigator.mediaDevices) return [];
+      let b = async () =>
+          (await navigator.mediaDevices.enumerateDevices()).filter(
+            (d) => "videoinput" === d.kind
+          ),
+        c;
+      try {
+        a &&
+          (await b()).every((d) => !d.label) &&
+          (c = await navigator.mediaDevices.getUserMedia({
+            audio: !1,
+            video: !0,
+          }));
+      } catch (d) {}
+      try {
+        return (await b()).map((d, f) => ({
+          id: d.deviceId,
+          label: d.label || (0 === f ? "Default Camera" : `Camera ${f + 1}`),
+        }));
+      } finally {
+        c &&
+          (console.warn(
+            "Call listCameras after successfully starting a QR scanner to avoid creating a temporary video stream"
+          ),
+          e._stopVideoStream(c));
+      }
+    }
+    async hasFlash() {
+      let a;
+      try {
+        if (this.$video.srcObject) {
+          if (!(this.$video.srcObject instanceof MediaStream)) return !1;
+          a = this.$video.srcObject;
+        } else a = (await this._getCameraStream()).stream;
+        return "torch" in a.getVideoTracks()[0].getSettings();
+      } catch (b) {
+        return !1;
+      } finally {
+        a &&
+          a !== this.$video.srcObject &&
+          (console.warn(
+            "Call hasFlash after successfully starting the scanner to avoid creating a temporary video stream"
+          ),
+          e._stopVideoStream(a));
+      }
+    }
+    isFlashOn() {
+      return this._flashOn;
+    }
+    async toggleFlash() {
+      this._flashOn ? await this.turnFlashOff() : await this.turnFlashOn();
+    }
+    async turnFlashOn() {
+      if (
+        !this._flashOn &&
+        !this._destroyed &&
+        ((this._flashOn = !0), this._active && !this._paused)
+      )
+        try {
+          if (!(await this.hasFlash())) throw "No flash available";
+          await this.$video.srcObject
+            .getVideoTracks()[0]
+            .applyConstraints({ advanced: [{ torch: !0 }] });
+        } catch (a) {
+          throw ((this._flashOn = !1), a);
+        }
+    }
+    async turnFlashOff() {
+      this._flashOn && ((this._flashOn = !1), await this._restartVideoStream());
+    }
+    destroy() {
+      this.$video.removeEventListener("loadedmetadata", this._onLoadedMetaData);
+      this.$video.removeEventListener("play", this._onPlay);
+      document.removeEventListener(
+        "visibilitychange",
+        this._onVisibilityChange
+      );
+      window.removeEventListener("resize", this._updateOverlay);
+      this._destroyed = !0;
+      this._flashOn = !1;
+      this.stop();
+      e._postWorkerMessage(this._qrEnginePromise, "close");
+    }
+    async start() {
+      if (this._destroyed)
+        throw Error(
+          "The QR scanner can not be started as it had been destroyed."
+        );
+      if (!this._active || this._paused)
+        if (
+          ("https:" !== window.location.protocol &&
+            console.warn(
+              "The camera stream is only accessible if the page is transferred via https."
+            ),
+          (this._active = !0),
+          !document.hidden)
+        )
+          if (((this._paused = !1), this.$video.srcObject))
+            await this.$video.play();
+          else
+            try {
+              let { stream: a, facingMode: b } = await this._getCameraStream();
+              !this._active || this._paused
+                ? e._stopVideoStream(a)
+                : (this._setVideoMirror(b),
+                  (this.$video.srcObject = a),
+                  await this.$video.play(),
+                  this._flashOn &&
+                    ((this._flashOn = !1), this.turnFlashOn().catch(() => {})));
+            } catch (a) {
+              if (!this._paused) throw ((this._active = !1), a);
+            }
+    }
+    stop() {
+      this.pause();
+      this._active = !1;
+    }
+    async pause(a = !1) {
+      this._paused = !0;
+      if (!this._active) return !0;
+      this.$video.pause();
+      this.$overlay && (this.$overlay.style.display = "none");
+      let b = () => {
+        this.$video.srcObject instanceof MediaStream &&
+          (e._stopVideoStream(this.$video.srcObject),
+          (this.$video.srcObject = null));
+      };
+      if (a) return b(), !0;
+      await new Promise((c) => setTimeout(c, 300));
+      if (!this._paused) return !1;
+      b();
+      return !0;
+    }
+    async setCamera(a) {
+      a !== this._preferredCamera &&
+        ((this._preferredCamera = a), await this._restartVideoStream());
+    }
+    static async scanImage(a, b, c, d, f = !1, h = !1) {
+      let m,
+        n = !1;
+      b &&
+      ("scanRegion" in b ||
+        "qrEngine" in b ||
+        "canvas" in b ||
+        "disallowCanvasResizing" in b ||
+        "alsoTryWithoutScanRegion" in b ||
+        "returnDetailedScanResult" in b)
+        ? ((m = b.scanRegion),
+          (c = b.qrEngine),
+          (d = b.canvas),
+          (f = b.disallowCanvasResizing || !1),
+          (h = b.alsoTryWithoutScanRegion || !1),
+          (n = !0))
+        : b || c || d || f || h
+        ? console.warn(
+            "You're using a deprecated api for scanImage which will be removed in the future."
+          )
+        : console.warn(
+            "Note that the return type of scanImage will change in the future. To already switch to the new api today, you can pass returnDetailedScanResult: true."
+          );
+      b = !!c;
+      try {
+        let p, k;
+        [c, p] = await Promise.all([c || e.createQrEngine(), e._loadImage(a)]);
+        [d, k] = e._drawToCanvas(p, m, d, f);
+        let q;
+        if (c instanceof Worker) {
+          let g = c;
+          b || e._postWorkerMessageSync(g, "inversionMode", "both");
+          q = await new Promise((l, v) => {
+            let w,
+              u,
+              r,
+              y = -1;
+            u = (t) => {
+              t.data.id === y &&
+                (g.removeEventListener("message", u),
+                g.removeEventListener("error", r),
+                clearTimeout(w),
+                null !== t.data.data
+                  ? l({
+                      data: t.data.data,
+                      cornerPoints: e._convertPoints(t.data.cornerPoints, m),
                     })
-            } _onDecodeError(a) { a !== e.NO_QR_CODE_FOUND && console.log(a) } async _getCameraStream() {
-                if (!navigator.mediaDevices) throw "Camera not found."; let a = /^(environment|user)$/.test(this._preferredCamera) ? "facingMode" :
-                    "deviceId", b = [{ width: { min: 1024 } }, { width: { min: 768 } }, {}], c = b.map(d => Object.assign({}, d, { [a]: { exact: this._preferredCamera } })); for (let d of [...c, ...b]) try { let f = await navigator.mediaDevices.getUserMedia({ video: d, audio: !1 }), h = this._getFacingMode(f) || (d.facingMode ? this._preferredCamera : "environment" === this._preferredCamera ? "user" : "environment"); return { stream: f, facingMode: h } } catch (f) { } throw "Camera not found.";
-            } async _restartVideoStream() { let a = this._paused; await this.pause(!0) && !a && this._active && await this.start() } static _stopVideoStream(a) {
-                for (let b of a.getTracks()) b.stop(),
-                    a.removeTrack(b)
-            } _setVideoMirror(a) { this.$video.style.transform = "scaleX(" + ("user" === a ? -1 : 1) + ")" } _getFacingMode(a) { return (a = a.getVideoTracks()[0]) ? /rear|back|environment/i.test(a.label) ? "environment" : /front|user|face/i.test(a.label) ? "user" : null : null } static _drawToCanvas(a, b, c, d = !1) {
-                c = c || document.createElement("canvas"); let f = b && b.x ? b.x : 0, h = b && b.y ? b.y : 0, m = b && b.width ? b.width : a.videoWidth || a.width, n = b && b.height ? b.height : a.videoHeight || a.height; d || (d = b && b.downScaledWidth ? b.downScaledWidth : m, b = b && b.downScaledHeight ?
-                    b.downScaledHeight : n, c.width !== d && (c.width = d), c.height !== b && (c.height = b)); b = c.getContext("2d", { alpha: !1 }); b.imageSmoothingEnabled = !1; b.drawImage(a, f, h, m, n, 0, 0, c.width, c.height); return [c, b]
-            } static async _loadImage(a) {
-                if (a instanceof Image) return await e._awaitImageLoad(a), a; if (a instanceof HTMLVideoElement || a instanceof HTMLCanvasElement || a instanceof SVGImageElement || "OffscreenCanvas" in window && a instanceof OffscreenCanvas || "ImageBitmap" in window && a instanceof ImageBitmap) return a; if (a instanceof
-                    File || a instanceof Blob || a instanceof URL || "string" === typeof a) { let b = new Image; b.src = a instanceof File || a instanceof Blob ? URL.createObjectURL(a) : a.toString(); try { return await e._awaitImageLoad(b), b } finally { (a instanceof File || a instanceof Blob) && URL.revokeObjectURL(b.src) } } else throw "Unsupported image type.";
-            } static async _awaitImageLoad(a) {
-                a.complete && 0 !== a.naturalWidth || await new Promise((b, c) => {
-                    let d = f => {
-                        a.removeEventListener("load", d); a.removeEventListener("error", d); f instanceof ErrorEvent ?
-                            c("Image load error") : b()
-                    }; a.addEventListener("load", d); a.addEventListener("error", d)
-                })
-            } static async _postWorkerMessage(a, b, c, d) { return e._postWorkerMessageSync(await a, b, c, d) } static _postWorkerMessageSync(a, b, c, d) { if (!(a instanceof Worker)) return -1; let f = e._workerMessageId++; a.postMessage({ id: f, type: b, data: c }, d); return f }
-    } e.DEFAULT_CANVAS_SIZE = 400; e.NO_QR_CODE_FOUND = "No QR code found"; e._disableBarcodeDetector = !1; e._workerMessageId = 0; return e
-})
+                  : v(e.NO_QR_CODE_FOUND));
+            };
+            r = (t) => {
+              g.removeEventListener("message", u);
+              g.removeEventListener("error", r);
+              clearTimeout(w);
+              v("Scanner error: " + (t ? t.message || t : "Unknown Error"));
+            };
+            g.addEventListener("message", u);
+            g.addEventListener("error", r);
+            w = setTimeout(() => r("timeout"), 1e4);
+            let x = k.getImageData(0, 0, d.width, d.height);
+            y = e._postWorkerMessageSync(g, "decode", x, [x.data.buffer]);
+          });
+        } else
+          q = await Promise.race([
+            new Promise((g, l) =>
+              window.setTimeout(() => l("Scanner error: timeout"), 1e4)
+            ),
+            (async () => {
+              try {
+                var [g] = await c.detect(d);
+                if (!g) throw e.NO_QR_CODE_FOUND;
+                return {
+                  data: g.rawValue,
+                  cornerPoints: e._convertPoints(g.cornerPoints, m),
+                };
+              } catch (l) {
+                g = l.message || l;
+                if (/not implemented|service unavailable/.test(g))
+                  return (
+                    (e._disableBarcodeDetector = !0),
+                    e.scanImage(a, {
+                      scanRegion: m,
+                      canvas: d,
+                      disallowCanvasResizing: f,
+                      alsoTryWithoutScanRegion: h,
+                    })
+                  );
+                throw `Scanner error: ${g}`;
+              }
+            })(),
+          ]);
+        return n ? q : q.data;
+      } catch (p) {
+        if (!m || !h) throw p;
+        let k = await e.scanImage(a, {
+          qrEngine: c,
+          canvas: d,
+          disallowCanvasResizing: f,
+        });
+        return n ? k : k.data;
+      } finally {
+        b || e._postWorkerMessage(c, "close");
+      }
+    }
+    setGrayscaleWeights(a, b, c, d = !0) {
+      e._postWorkerMessage(this._qrEnginePromise, "grayscaleWeights", {
+        red: a,
+        green: b,
+        blue: c,
+        useIntegerApproximation: d,
+      });
+    }
+    setInversionMode(a) {
+      e._postWorkerMessage(this._qrEnginePromise, "inversionMode", a);
+    }
+    static async createQrEngine(a) {
+      a &&
+        console.warn(
+          "Specifying a worker path is not required and not supported anymore."
+        );
+      a = () =>
+        import("./qr-scanner-worker.min.js").then((c) => c.createWorker());
+      if (
+        !(
+          !e._disableBarcodeDetector &&
+          "BarcodeDetector" in window &&
+          BarcodeDetector.getSupportedFormats &&
+          (await BarcodeDetector.getSupportedFormats()).includes("qr_code")
+        )
+      )
+        return a();
+      let b = navigator.userAgentData;
+      return b &&
+        b.brands.some(({ brand: c }) => /Chromium/i.test(c)) &&
+        /mac ?OS/i.test(b.platform) &&
+        (await b
+          .getHighEntropyValues(["architecture", "platformVersion"])
+          .then(
+            ({ architecture: c, platformVersion: d }) =>
+              /arm/i.test(c || "arm") && 13 <= parseInt(d || "13")
+          )
+          .catch(() => !0))
+        ? a()
+        : new BarcodeDetector({ formats: ["qr_code"] });
+    }
+    _onPlay() {
+      this._scanRegion = this._calculateScanRegion(this.$video);
+      this._updateOverlay();
+      this.$overlay && (this.$overlay.style.display = "");
+      this._scanFrame();
+    }
+    _onLoadedMetaData() {
+      this._scanRegion = this._calculateScanRegion(this.$video);
+      this._updateOverlay();
+    }
+    _onVisibilityChange() {
+      document.hidden ? this.pause() : this._active && this.start();
+    }
+    _calculateScanRegion(a) {
+      let b = Math.round((2 / 3) * Math.min(a.videoWidth, a.videoHeight));
+      return {
+        x: Math.round((a.videoWidth - b) / 2),
+        y: Math.round((a.videoHeight - b) / 2),
+        width: b,
+        height: b,
+        downScaledWidth: this._legacyCanvasSize,
+        downScaledHeight: this._legacyCanvasSize,
+      };
+    }
+    _updateOverlay() {
+      requestAnimationFrame(() => {
+        if (this.$overlay) {
+          var a = this.$video,
+            b = a.videoWidth,
+            c = a.videoHeight,
+            d = a.offsetWidth,
+            f = a.offsetHeight,
+            h = a.offsetLeft,
+            m = a.offsetTop,
+            n = window.getComputedStyle(a),
+            p = n.objectFit,
+            k = b / c,
+            q = d / f;
+          switch (p) {
+            case "none":
+              var g = b;
+              var l = c;
+              break;
+            case "fill":
+              g = d;
+              l = f;
+              break;
+            default:
+              ("cover" === p ? k > q : k < q)
+                ? ((l = f), (g = l * k))
+                : ((g = d), (l = g / k)),
+                "scale-down" === p &&
+                  ((g = Math.min(g, b)), (l = Math.min(l, c)));
+          }
+          var [v, w] = n.objectPosition.split(" ").map((r, y) => {
+            const x = parseFloat(r);
+            return r.endsWith("%") ? ((y ? f - l : d - g) * x) / 100 : x;
+          });
+          n = this._scanRegion.width || b;
+          q = this._scanRegion.height || c;
+          p = this._scanRegion.x || 0;
+          var u = this._scanRegion.y || 0;
+          k = this.$overlay.style;
+          k.width = `${(n / b) * g}px`;
+          k.height = `${(q / c) * l}px`;
+          k.top = `${m + w + (u / c) * l}px`;
+          c = /scaleX\(-1\)/.test(a.style.transform);
+          k.left = `${
+            h + (c ? d - v - g : v) + ((c ? b - p - n : p) / b) * g
+          }px`;
+          k.transform = a.style.transform;
+        }
+      });
+    }
+    static _convertPoints(a, b) {
+      if (!b) return a;
+      let c = b.x || 0,
+        d = b.y || 0,
+        f = b.width && b.downScaledWidth ? b.width / b.downScaledWidth : 1;
+      b = b.height && b.downScaledHeight ? b.height / b.downScaledHeight : 1;
+      for (let h of a) (h.x = h.x * f + c), (h.y = h.y * b + d);
+      return a;
+    }
+    _scanFrame() {
+      !this._active ||
+        this.$video.paused ||
+        this.$video.ended ||
+        ("requestVideoFrameCallback" in this.$video
+          ? this.$video.requestVideoFrameCallback.bind(this.$video)
+          : requestAnimationFrame)(async () => {
+          if (!(1 >= this.$video.readyState)) {
+            var a = Date.now() - this._lastScanTimestamp,
+              b = 1e3 / this._maxScansPerSecond;
+            a < b && (await new Promise((d) => setTimeout(d, b - a)));
+            this._lastScanTimestamp = Date.now();
+            try {
+              var c = await e.scanImage(this.$video, {
+                scanRegion: this._scanRegion,
+                qrEngine: this._qrEnginePromise,
+                canvas: this.$canvas,
+              });
+            } catch (d) {
+              if (!this._active) return;
+              this._onDecodeError(d);
+            }
+            !e._disableBarcodeDetector ||
+              (await this._qrEnginePromise) instanceof Worker ||
+              (this._qrEnginePromise = e.createQrEngine());
+            c
+              ? (this._onDecode
+                  ? this._onDecode(c)
+                  : this._legacyOnDecode && this._legacyOnDecode(c.data),
+                this.$codeOutlineHighlight &&
+                  (clearTimeout(this._codeOutlineHighlightRemovalTimeout),
+                  (this._codeOutlineHighlightRemovalTimeout = void 0),
+                  this.$codeOutlineHighlight.setAttribute(
+                    "viewBox",
+                    `${this._scanRegion.x || 0} ` +
+                      `${this._scanRegion.y || 0} ` +
+                      `${this._scanRegion.width || this.$video.videoWidth} ` +
+                      `${this._scanRegion.height || this.$video.videoHeight}`
+                  ),
+                  this.$codeOutlineHighlight.firstElementChild.setAttribute(
+                    "points",
+                    c.cornerPoints
+                      .map(({ x: d, y: f }) => `${d},${f}`)
+                      .join(" ")
+                  ),
+                  (this.$codeOutlineHighlight.style.display = "")))
+              : this.$codeOutlineHighlight &&
+                !this._codeOutlineHighlightRemovalTimeout &&
+                (this._codeOutlineHighlightRemovalTimeout = setTimeout(
+                  () => (this.$codeOutlineHighlight.style.display = "none"),
+                  100
+                ));
+          }
+          this._scanFrame();
+        });
+    }
+    _onDecodeError(a) {
+      a !== e.NO_QR_CODE_FOUND && console.log(a);
+    }
+    async _getCameraStream() {
+      if (!navigator.mediaDevices) throw "Camera not found.";
+      let a = /^(environment|user)$/.test(this._preferredCamera)
+          ? "facingMode"
+          : "deviceId",
+        b = [{ width: { min: 1024 } }, { width: { min: 768 } }, {}],
+        c = b.map((d) =>
+          Object.assign({}, d, { [a]: { exact: this._preferredCamera } })
+        );
+      for (let d of [...c, ...b])
+        try {
+          let f = await navigator.mediaDevices.getUserMedia({
+              video: d,
+              audio: !1,
+            }),
+            h =
+              this._getFacingMode(f) ||
+              (d.facingMode
+                ? this._preferredCamera
+                : "environment" === this._preferredCamera
+                ? "user"
+                : "environment");
+          return { stream: f, facingMode: h };
+        } catch (f) {}
+      throw "Camera not found.";
+    }
+    async _restartVideoStream() {
+      let a = this._paused;
+      (await this.pause(!0)) && !a && this._active && (await this.start());
+    }
+    static _stopVideoStream(a) {
+      for (let b of a.getTracks()) b.stop(), a.removeTrack(b);
+    }
+    _setVideoMirror(a) {
+      this.$video.style.transform = "scaleX(" + ("user" === a ? -1 : 1) + ")";
+    }
+    _getFacingMode(a) {
+      return (a = a.getVideoTracks()[0])
+        ? /rear|back|environment/i.test(a.label)
+          ? "environment"
+          : /front|user|face/i.test(a.label)
+          ? "user"
+          : null
+        : null;
+    }
+    static _drawToCanvas(a, b, c, d = !1) {
+      c = c || document.createElement("canvas");
+      let f = b && b.x ? b.x : 0,
+        h = b && b.y ? b.y : 0,
+        m = b && b.width ? b.width : a.videoWidth || a.width,
+        n = b && b.height ? b.height : a.videoHeight || a.height;
+      d ||
+        ((d = b && b.downScaledWidth ? b.downScaledWidth : m),
+        (b = b && b.downScaledHeight ? b.downScaledHeight : n),
+        c.width !== d && (c.width = d),
+        c.height !== b && (c.height = b));
+      b = c.getContext("2d", { alpha: !1 });
+      b.imageSmoothingEnabled = !1;
+      b.drawImage(a, f, h, m, n, 0, 0, c.width, c.height);
+      return [c, b];
+    }
+    static async _loadImage(a) {
+      if (a instanceof Image) return await e._awaitImageLoad(a), a;
+      if (
+        a instanceof HTMLVideoElement ||
+        a instanceof HTMLCanvasElement ||
+        a instanceof SVGImageElement ||
+        ("OffscreenCanvas" in window && a instanceof OffscreenCanvas) ||
+        ("ImageBitmap" in window && a instanceof ImageBitmap)
+      )
+        return a;
+      if (
+        a instanceof File ||
+        a instanceof Blob ||
+        a instanceof URL ||
+        "string" === typeof a
+      ) {
+        let b = new Image();
+        b.src =
+          a instanceof File || a instanceof Blob
+            ? URL.createObjectURL(a)
+            : a.toString();
+        try {
+          return await e._awaitImageLoad(b), b;
+        } finally {
+          (a instanceof File || a instanceof Blob) &&
+            URL.revokeObjectURL(b.src);
+        }
+      } else throw "Unsupported image type.";
+    }
+    static async _awaitImageLoad(a) {
+      (a.complete && 0 !== a.naturalWidth) ||
+        (await new Promise((b, c) => {
+          let d = (f) => {
+            a.removeEventListener("load", d);
+            a.removeEventListener("error", d);
+            f instanceof ErrorEvent ? c("Image load error") : b();
+          };
+          a.addEventListener("load", d);
+          a.addEventListener("error", d);
+        }));
+    }
+    static async _postWorkerMessage(a, b, c, d) {
+      return e._postWorkerMessageSync(await a, b, c, d);
+    }
+    static _postWorkerMessageSync(a, b, c, d) {
+      if (!(a instanceof Worker)) return -1;
+      let f = e._workerMessageId++;
+      a.postMessage({ id: f, type: b, data: c }, d);
+      return f;
+    }
+  }
+  e.DEFAULT_CANVAS_SIZE = 400;
+  e.NO_QR_CODE_FOUND = "No QR code found";
+  e._disableBarcodeDetector = !1;
+  e._workerMessageId = 0;
+  return e;
+});
 //# sourceMappingURL=qr-scanner.umd.min.js.map
diff --git a/require/js/qr-scanner/qr-scanner.umd.min.js.map b/require/js/qr-scanner/qr-scanner.umd.min.js.map
new file mode 100644
index 0000000..924569c
--- /dev/null
+++ b/require/js/qr-scanner/qr-scanner.umd.min.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"qr-scanner.umd.min.js","sources":["src/qr-scanner.ts"],"sourcesContent":["class QrScanner {\n    static readonly DEFAULT_CANVAS_SIZE = 400;\n    static readonly NO_QR_CODE_FOUND = 'No QR code found';\n    private static _disableBarcodeDetector = false;\n    private static _workerMessageId = 0;\n\n    /** @deprecated */\n    static set WORKER_PATH(workerPath: string) {\n        console.warn('Setting QrScanner.WORKER_PATH is not required and not supported anymore. '\n            + 'Have a look at the README for new setup instructions.');\n    }\n\n    static async hasCamera(): Promise<boolean> {\n        try {\n            return !!(await QrScanner.listCameras(false)).length;\n        } catch (e) {\n            return false;\n        }\n    }\n\n    static async listCameras(requestLabels = false): Promise<Array<QrScanner.Camera>> {\n        if (!navigator.mediaDevices) return [];\n\n        const enumerateCameras = async (): Promise<Array<MediaDeviceInfo>> =>\n            (await navigator.mediaDevices.enumerateDevices()).filter((device) => device.kind === 'videoinput');\n\n        // Note that enumerateDevices can always be called and does not prompt the user for permission.\n        // However, enumerateDevices only includes device labels if served via https and an active media stream exists\n        // or permission to access the camera was given. Therefore, if we're not getting labels but labels are requested\n        // ask for camera permission by opening a stream.\n        let openedStream: MediaStream | undefined;\n        try {\n            if (requestLabels && (await enumerateCameras()).every((camera) => !camera.label)) {\n                openedStream = await navigator.mediaDevices.getUserMedia({ audio: false, video: true });\n            }\n        } catch (e) {\n            // Fail gracefully, especially if the device has no camera or on mobile when the camera is already in use\n            // and some browsers disallow a second stream.\n        }\n\n        try {\n            return (await enumerateCameras()).map((camera, i) => ({\n                id: camera.deviceId,\n                label: camera.label || (i === 0 ? 'Default Camera' : `Camera ${i + 1}`),\n            }));\n        } finally {\n            // close the stream we just opened for getting camera access for listing the device labels\n            if (openedStream) {\n                console.warn('Call listCameras after successfully starting a QR scanner to avoid creating '\n                    + 'a temporary video stream');\n                QrScanner._stopVideoStream(openedStream);\n            }\n        }\n    }\n\n    readonly $video: HTMLVideoElement;\n    readonly $canvas: HTMLCanvasElement;\n    readonly $overlay?: HTMLDivElement;\n    private readonly $codeOutlineHighlight?: SVGSVGElement;\n    private readonly _onDecode?: (result: QrScanner.ScanResult) => void;\n    private readonly _legacyOnDecode?: (result: string) => void;\n    private readonly _legacyCanvasSize: number = QrScanner.DEFAULT_CANVAS_SIZE;\n    private _preferredCamera: QrScanner.FacingMode | QrScanner.DeviceId = 'environment';\n    private readonly _maxScansPerSecond: number = 25;\n    private _lastScanTimestamp: number = -1;\n    private _scanRegion: QrScanner.ScanRegion;\n    private _codeOutlineHighlightRemovalTimeout?: number;\n    private _qrEnginePromise: Promise<Worker | BarcodeDetector>\n    private _active: boolean = false;\n    private _paused: boolean = false;\n    private _flashOn: boolean = false;\n    private _destroyed: boolean = false;\n\n    constructor(\n        video: HTMLVideoElement,\n        onDecode: (result: QrScanner.ScanResult) => void,\n        options: {\n            onDecodeError?: (error: Error | string) => void,\n            calculateScanRegion?: (video: HTMLVideoElement) => QrScanner.ScanRegion,\n            preferredCamera?: QrScanner.FacingMode | QrScanner.DeviceId,\n            maxScansPerSecond?: number;\n            highlightScanRegion?: boolean,\n            highlightCodeOutline?: boolean,\n            overlay?: HTMLDivElement,\n            /** just a temporary flag until we switch entirely to the new api */\n            returnDetailedScanResult?: true,\n        },\n    );\n    /** @deprecated */\n    constructor(\n        video: HTMLVideoElement,\n        onDecode: (result: string) => void,\n        onDecodeError?: (error: Error | string) => void,\n        calculateScanRegion?: (video: HTMLVideoElement) => QrScanner.ScanRegion,\n        preferredCamera?: QrScanner.FacingMode | QrScanner.DeviceId,\n    );\n    /** @deprecated */\n    constructor(\n        video: HTMLVideoElement,\n        onDecode: (result: string) => void,\n        onDecodeError?: (error: Error | string) => void,\n        canvasSize?: number,\n        preferredCamera?: QrScanner.FacingMode | QrScanner.DeviceId,\n    );\n    /** @deprecated */\n    constructor(video: HTMLVideoElement, onDecode: (result: string) => void, canvasSize?: number);\n    constructor(\n        video: HTMLVideoElement,\n        onDecode: ((result: QrScanner.ScanResult) => void) | ((result: string) => void),\n        canvasSizeOrOnDecodeErrorOrOptions?: number | ((error: Error | string) => void) | {\n            onDecodeError?: (error: Error | string) => void,\n            calculateScanRegion?: (video: HTMLVideoElement) => QrScanner.ScanRegion,\n            preferredCamera?: QrScanner.FacingMode | QrScanner.DeviceId,\n            maxScansPerSecond?: number;\n            highlightScanRegion?: boolean,\n            highlightCodeOutline?: boolean,\n            overlay?: HTMLDivElement,\n            /** just a temporary flag until we switch entirely to the new api */\n            returnDetailedScanResult?: true,\n        },\n        canvasSizeOrCalculateScanRegion?: number | ((video: HTMLVideoElement) => QrScanner.ScanRegion),\n        preferredCamera?: QrScanner.FacingMode | QrScanner.DeviceId,\n    ) {\n        this.$video = video;\n        this.$canvas = document.createElement('canvas');\n\n        if (canvasSizeOrOnDecodeErrorOrOptions && typeof canvasSizeOrOnDecodeErrorOrOptions === 'object') {\n            // we got an options object using the new api\n            this._onDecode = onDecode as QrScanner['_onDecode'];\n        } else {\n            if (canvasSizeOrOnDecodeErrorOrOptions || canvasSizeOrCalculateScanRegion || preferredCamera) {\n                console.warn('You\\'re using a deprecated version of the QrScanner constructor which will be removed in '\n                    + 'the future');\n            } else {\n                // Only video and onDecode were specified and we can't distinguish between new or old api usage. For\n                // backwards compatibility we have to assume the old api for now. The options object is marked as non-\n                // optional in the parameter list above to make clear that ScanResult instead of string is only passed\n                // if an options object was provided. However, in the future once legacy support is removed, the options\n                // object should become optional.\n                console.warn('Note that the type of the scan result passed to onDecode will change in the future. '\n                    + 'To already switch to the new api today, you can pass returnDetailedScanResult: true.');\n            }\n            this._legacyOnDecode = onDecode as QrScanner['_legacyOnDecode'];\n        }\n\n        const options = typeof canvasSizeOrOnDecodeErrorOrOptions === 'object'\n            ? canvasSizeOrOnDecodeErrorOrOptions\n            : {};\n        this._onDecodeError = options.onDecodeError || (typeof canvasSizeOrOnDecodeErrorOrOptions === 'function'\n            ? canvasSizeOrOnDecodeErrorOrOptions\n            : this._onDecodeError);\n        this._calculateScanRegion = options.calculateScanRegion || (typeof canvasSizeOrCalculateScanRegion==='function'\n            ? canvasSizeOrCalculateScanRegion\n            : this._calculateScanRegion);\n        this._preferredCamera = options.preferredCamera || preferredCamera || this._preferredCamera;\n        this._legacyCanvasSize = typeof canvasSizeOrOnDecodeErrorOrOptions === 'number'\n            ? canvasSizeOrOnDecodeErrorOrOptions\n            : typeof canvasSizeOrCalculateScanRegion === 'number'\n                ? canvasSizeOrCalculateScanRegion\n                : this._legacyCanvasSize;\n        this._maxScansPerSecond = options.maxScansPerSecond || this._maxScansPerSecond;\n\n        this._onPlay = this._onPlay.bind(this);\n        this._onLoadedMetaData = this._onLoadedMetaData.bind(this);\n        this._onVisibilityChange = this._onVisibilityChange.bind(this);\n        this._updateOverlay = this._updateOverlay.bind(this);\n\n        // @ts-ignore\n        video.disablePictureInPicture = true;\n        // Allow inline playback on iPhone instead of requiring full screen playback,\n        // see https://webkit.org/blog/6784/new-video-policies-for-ios/\n        // @ts-ignore\n        video.playsInline = true;\n        // Allow play() on iPhone without requiring a user gesture. Should not really be needed as camera stream\n        // includes no audio, but just to be safe.\n        video.muted = true;\n\n        // Avoid Safari stopping the video stream on a hidden video.\n        // See https://github.com/cozmo/jsQR/issues/185\n        let shouldHideVideo = false;\n        if (video.hidden) {\n            video.hidden = false;\n            shouldHideVideo = true;\n        }\n        if (!document.body.contains(video)) {\n            document.body.appendChild(video);\n            shouldHideVideo = true;\n        }\n        const videoContainer = video.parentElement!;\n\n        if (options.highlightScanRegion || options.highlightCodeOutline) {\n            const gotExternalOverlay = !!options.overlay;\n            this.$overlay = options.overlay || document.createElement('div');\n            const overlayStyle = this.$overlay.style;\n            overlayStyle.position = 'absolute';\n            overlayStyle.display = 'none';\n            overlayStyle.pointerEvents = 'none';\n            this.$overlay.classList.add('scan-region-highlight');\n            if (!gotExternalOverlay && options.highlightScanRegion) {\n                // default style; can be overwritten via css, e.g. by changing the svg's stroke color, hiding the\n                // .scan-region-highlight-svg, setting a border, outline, background, etc.\n                this.$overlay.innerHTML = '<svg class=\"scan-region-highlight-svg\" viewBox=\"0 0 238 238\" '\n                    + 'preserveAspectRatio=\"none\" style=\"position:absolute;width:100%;height:100%;left:0;top:0;'\n                    + 'fill:none;stroke:#e9b213;stroke-width:4;stroke-linecap:round;stroke-linejoin:round\">'\n                    + '<path d=\"M31 2H10a8 8 0 0 0-8 8v21M207 2h21a8 8 0 0 1 8 8v21m0 176v21a8 8 0 0 1-8 8h-21m-176 '\n                    + '0H10a8 8 0 0 1-8-8v-21\"/></svg>';\n                try {\n                    this.$overlay.firstElementChild!.animate({ transform: ['scale(.98)', 'scale(1.01)'] }, {\n                        duration: 400,\n                        iterations: Infinity,\n                        direction: 'alternate',\n                        easing: 'ease-in-out',\n                    });\n                } catch (e) {}\n                videoContainer.insertBefore(this.$overlay, this.$video.nextSibling);\n            }\n            if (options.highlightCodeOutline) {\n                // default style; can be overwritten via css\n                this.$overlay.insertAdjacentHTML(\n                    'beforeend',\n                    '<svg class=\"code-outline-highlight\" preserveAspectRatio=\"none\" style=\"display:none;width:100%;'\n                        + 'height:100%;fill:none;stroke:#e9b213;stroke-width:5;stroke-dasharray:25;'\n                        + 'stroke-linecap:round;stroke-linejoin:round\"><polygon/></svg>',\n                );\n                this.$codeOutlineHighlight = this.$overlay.lastElementChild as SVGSVGElement;\n            }\n        }\n        this._scanRegion = this._calculateScanRegion(video);\n\n        requestAnimationFrame(() => {\n            // Checking in requestAnimationFrame which should avoid a potential additional re-flow for getComputedStyle.\n            const videoStyle = window.getComputedStyle(video);\n            if (videoStyle.display === 'none') {\n                video.style.setProperty('display', 'block', 'important');\n                shouldHideVideo = true;\n            }\n            if (videoStyle.visibility !== 'visible') {\n                video.style.setProperty('visibility', 'visible', 'important');\n                shouldHideVideo = true;\n            }\n            if (shouldHideVideo) {\n                // Hide the video in a way that doesn't cause Safari to stop the playback.\n                console.warn('QrScanner has overwritten the video hiding style to avoid Safari stopping the playback.');\n                video.style.opacity = '0';\n                video.style.width = '0';\n                video.style.height = '0';\n                if (this.$overlay && this.$overlay.parentElement) {\n                    this.$overlay.parentElement.removeChild(this.$overlay);\n                }\n                // @ts-ignore\n                delete this.$overlay!;\n                // @ts-ignore\n                delete this.$codeOutlineHighlight!;\n            }\n\n            if (this.$overlay) {\n                this._updateOverlay();\n            }\n        });\n\n        video.addEventListener('play', this._onPlay);\n        video.addEventListener('loadedmetadata', this._onLoadedMetaData);\n        document.addEventListener('visibilitychange', this._onVisibilityChange);\n        window.addEventListener('resize', this._updateOverlay);\n\n        this._qrEnginePromise = QrScanner.createQrEngine();\n    }\n\n    async hasFlash(): Promise<boolean> {\n        let stream: MediaStream | undefined;\n        try {\n            if (this.$video.srcObject) {\n                if (!(this.$video.srcObject instanceof MediaStream)) return false; // srcObject is not a camera stream\n                stream = this.$video.srcObject;\n            } else {\n                stream = (await this._getCameraStream()).stream;\n            }\n            return 'torch' in stream.getVideoTracks()[0].getSettings();\n        } catch (e) {\n            return false;\n        } finally {\n            // close the stream we just opened for detecting whether it supports flash\n            if (stream && stream !== this.$video.srcObject) {\n                console.warn('Call hasFlash after successfully starting the scanner to avoid creating '\n                    + 'a temporary video stream');\n                QrScanner._stopVideoStream(stream);\n            }\n        }\n    }\n\n    isFlashOn(): boolean {\n        return this._flashOn;\n    }\n\n    async toggleFlash(): Promise<void> {\n        if (this._flashOn) {\n            await this.turnFlashOff();\n        } else {\n            await this.turnFlashOn();\n        }\n    }\n\n    async turnFlashOn(): Promise<void> {\n        if (this._flashOn || this._destroyed) return;\n        this._flashOn = true;\n        if (!this._active || this._paused) return; // flash will be turned on later on .start()\n        try {\n            if (!await this.hasFlash()) throw 'No flash available';\n            // Note that the video track is guaranteed to exist and to be a MediaStream due to the check in hasFlash\n            await (this.$video.srcObject as MediaStream).getVideoTracks()[0].applyConstraints({\n                // @ts-ignore: constraint 'torch' is unknown to ts\n                advanced: [{ torch: true }],\n            });\n        } catch (e) {\n            this._flashOn = false;\n            throw e;\n        }\n    }\n\n    async turnFlashOff(): Promise<void> {\n        if (!this._flashOn) return;\n        // applyConstraints with torch: false does not work to turn the flashlight off, as a stream's torch stays\n        // continuously on, see https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints#torch. Therefore,\n        // we have to stop the stream to turn the flashlight off.\n        this._flashOn = false;\n        await this._restartVideoStream();\n    }\n\n    destroy(): void {\n        this.$video.removeEventListener('loadedmetadata', this._onLoadedMetaData);\n        this.$video.removeEventListener('play', this._onPlay);\n        document.removeEventListener('visibilitychange', this._onVisibilityChange);\n        window.removeEventListener('resize', this._updateOverlay);\n\n        this._destroyed = true;\n        this._flashOn = false;\n        this.stop(); // sets this._paused = true and this._active = false\n        QrScanner._postWorkerMessage(this._qrEnginePromise, 'close');\n    }\n\n    async start(): Promise<void> {\n        if (this._destroyed) throw new Error('The QR scanner can not be started as it had been destroyed.');\n        if (this._active && !this._paused) return;\n\n        if (window.location.protocol !== 'https:') {\n            // warn but try starting the camera anyways\n            console.warn('The camera stream is only accessible if the page is transferred via https.');\n        }\n\n        this._active = true;\n        if (document.hidden) return; // camera will be started as soon as tab is in foreground\n        this._paused = false;\n        if (this.$video.srcObject) {\n            // camera stream already/still set\n            await this.$video.play();\n            return;\n        }\n\n        try {\n            const { stream, facingMode } = await this._getCameraStream();\n            if (!this._active || this._paused) {\n                // was stopped in the meantime\n                QrScanner._stopVideoStream(stream);\n                return;\n            }\n            this._setVideoMirror(facingMode);\n            this.$video.srcObject = stream;\n            await this.$video.play();\n\n            // Restart the flash if it was previously on\n            if (this._flashOn) {\n                this._flashOn = false; // force turnFlashOn to restart the flash\n                this.turnFlashOn().catch(() => {});\n            }\n        } catch (e) {\n            if (this._paused) return;\n            this._active = false;\n            throw e;\n        }\n    }\n\n    stop(): void {\n        this.pause();\n        this._active = false;\n    }\n\n    async pause(stopStreamImmediately = false): Promise<boolean> {\n        this._paused = true;\n        if (!this._active) return true;\n        this.$video.pause();\n\n        if (this.$overlay) {\n            this.$overlay.style.display = 'none';\n        }\n\n        const stopStream = () => {\n            if (this.$video.srcObject instanceof MediaStream) {\n                // revoke srcObject only if it's a stream which was likely set by us\n                QrScanner._stopVideoStream(this.$video.srcObject);\n                this.$video.srcObject = null;\n            }\n        };\n\n        if (stopStreamImmediately) {\n            stopStream();\n            return true;\n        }\n\n        await new Promise((resolve) => setTimeout(resolve, 300));\n        if (!this._paused) return false;\n        stopStream();\n        return true;\n    }\n\n    async setCamera(facingModeOrDeviceId: QrScanner.FacingMode | QrScanner.DeviceId): Promise<void> {\n        if (facingModeOrDeviceId === this._preferredCamera) return;\n        this._preferredCamera = facingModeOrDeviceId;\n        // Restart the scanner with the new camera which will also update the video mirror and the scan region.\n        await this._restartVideoStream();\n    }\n\n    static async scanImage(\n        imageOrFileOrBlobOrUrl: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap\n            | SVGImageElement | File | Blob | URL | String,\n        options: {\n            scanRegion?: QrScanner.ScanRegion | null,\n            qrEngine?: Worker | BarcodeDetector | Promise<Worker | BarcodeDetector> | null,\n            canvas?: HTMLCanvasElement | null,\n            disallowCanvasResizing?: boolean,\n            alsoTryWithoutScanRegion?: boolean,\n            /** just a temporary flag until we switch entirely to the new api */\n            returnDetailedScanResult?: true,\n        },\n    ): Promise<QrScanner.ScanResult>;\n    /** @deprecated */\n    static async scanImage(\n        imageOrFileOrBlobOrUrl: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap\n            | SVGImageElement | File | Blob | URL | String,\n        scanRegion?: QrScanner.ScanRegion | null,\n        qrEngine?: Worker | BarcodeDetector | Promise<Worker | BarcodeDetector> | null,\n        canvas?: HTMLCanvasElement | null,\n        disallowCanvasResizing?: boolean,\n        alsoTryWithoutScanRegion?: boolean,\n    ): Promise<string>;\n    static async scanImage(\n        imageOrFileOrBlobOrUrl: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap\n            | SVGImageElement | File | Blob | URL | String,\n        scanRegionOrOptions?: QrScanner.ScanRegion | {\n            scanRegion?: QrScanner.ScanRegion | null,\n            qrEngine?: Worker | BarcodeDetector | Promise<Worker | BarcodeDetector> | null,\n            canvas?: HTMLCanvasElement | null,\n            disallowCanvasResizing?: boolean,\n            alsoTryWithoutScanRegion?: boolean,\n            /** just a temporary flag until we switch entirely to the new api */\n            returnDetailedScanResult?: true,\n        } | null,\n        qrEngine?: Worker | BarcodeDetector | Promise<Worker | BarcodeDetector> | null,\n        canvas?: HTMLCanvasElement | null,\n        disallowCanvasResizing: boolean = false,\n        alsoTryWithoutScanRegion: boolean = false,\n    ): Promise<string | QrScanner.ScanResult> {\n        let scanRegion: QrScanner.ScanRegion | null | undefined;\n        let returnDetailedScanResult = false;\n        if (scanRegionOrOptions && (\n            'scanRegion' in scanRegionOrOptions\n            || 'qrEngine' in scanRegionOrOptions\n            || 'canvas' in scanRegionOrOptions\n            || 'disallowCanvasResizing' in scanRegionOrOptions\n            || 'alsoTryWithoutScanRegion' in scanRegionOrOptions\n            || 'returnDetailedScanResult' in scanRegionOrOptions\n        )) {\n            // we got an options object using the new api\n            scanRegion = scanRegionOrOptions.scanRegion;\n            qrEngine = scanRegionOrOptions.qrEngine;\n            canvas = scanRegionOrOptions.canvas;\n            disallowCanvasResizing = scanRegionOrOptions.disallowCanvasResizing || false;\n            alsoTryWithoutScanRegion = scanRegionOrOptions.alsoTryWithoutScanRegion || false;\n            returnDetailedScanResult = true;\n        } else if (scanRegionOrOptions || qrEngine || canvas || disallowCanvasResizing || alsoTryWithoutScanRegion) {\n            console.warn('You\\'re using a deprecated api for scanImage which will be removed in the future.');\n        } else {\n            // Only imageOrFileOrBlobOrUrl was specified and we can't distinguish between new or old api usage. For\n            // backwards compatibility we have to assume the old api for now. The options object is marked as non-\n            // optional in the parameter list above to make clear that ScanResult instead of string is only returned if\n            // an options object was provided. However, in the future once legacy support is removed, the options object\n            // should become optional.\n            console.warn('Note that the return type of scanImage will change in the future. To already switch to the '\n                + 'new api today, you can pass returnDetailedScanResult: true.');\n        }\n\n        const gotExternalEngine = !!qrEngine;\n\n        try {\n            let image: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap\n                | SVGImageElement;\n            let canvasContext: CanvasRenderingContext2D;\n            [qrEngine, image] = await Promise.all([\n                qrEngine || QrScanner.createQrEngine(),\n                QrScanner._loadImage(imageOrFileOrBlobOrUrl),\n            ]);\n            [canvas, canvasContext] = QrScanner._drawToCanvas(image, scanRegion, canvas, disallowCanvasResizing);\n            let detailedScanResult: QrScanner.ScanResult;\n\n            if (qrEngine instanceof Worker) {\n                const qrEngineWorker = qrEngine; // for ts to know that it's still a worker later in the event listeners\n                if (!gotExternalEngine) {\n                    // Enable scanning of inverted color qr codes.\n                    QrScanner._postWorkerMessageSync(qrEngineWorker, 'inversionMode', 'both');\n                }\n                detailedScanResult = await new Promise((resolve, reject) => {\n                    let timeout: number;\n                    let onMessage: (event: MessageEvent) => void;\n                    let onError: (error: ErrorEvent | string) => void;\n                    let expectedResponseId = -1;\n                    onMessage = (event: MessageEvent) => {\n                        if (event.data.id !== expectedResponseId) {\n                            return;\n                        }\n                        qrEngineWorker.removeEventListener('message', onMessage);\n                        qrEngineWorker.removeEventListener('error', onError);\n                        clearTimeout(timeout);\n                        if (event.data.data !== null) {\n                            resolve({\n                                data: event.data.data,\n                                cornerPoints: QrScanner._convertPoints(event.data.cornerPoints, scanRegion),\n                            });\n                        } else {\n                            reject(QrScanner.NO_QR_CODE_FOUND);\n                        }\n                    };\n                    onError = (error: ErrorEvent | string) => {\n                        qrEngineWorker.removeEventListener('message', onMessage);\n                        qrEngineWorker.removeEventListener('error', onError);\n                        clearTimeout(timeout);\n                        const errorMessage = !error ? 'Unknown Error' : ((error as ErrorEvent).message || error);\n                        reject('Scanner error: ' + errorMessage);\n                    };\n                    qrEngineWorker.addEventListener('message', onMessage);\n                    qrEngineWorker.addEventListener('error', onError);\n                    timeout = setTimeout(() => onError('timeout'), 10000);\n                    const imageData = canvasContext.getImageData(0, 0, canvas!.width, canvas!.height);\n                    expectedResponseId = QrScanner._postWorkerMessageSync(\n                        qrEngineWorker,\n                        'decode',\n                        imageData,\n                        [imageData.data.buffer],\n                    );\n                });\n            } else {\n                detailedScanResult = await Promise.race([\n                    new Promise<QrScanner.ScanResult>((resolve, reject) => window.setTimeout(\n                        () => reject('Scanner error: timeout'),\n                        10000,\n                    )),\n                    (async (): Promise<QrScanner.ScanResult> => {\n                        try {\n                            const [scanResult] = await qrEngine.detect(canvas!);\n                            if (!scanResult) throw QrScanner.NO_QR_CODE_FOUND;\n                            return {\n                                data: scanResult.rawValue,\n                                cornerPoints: QrScanner._convertPoints(scanResult.cornerPoints, scanRegion),\n                            };\n                        } catch (e) {\n                            const errorMessage = (e as Error).message || e as string;\n                            if (/not implemented|service unavailable/.test(errorMessage)) {\n                                // Not implemented can apparently for some reason happen even though getSupportedFormats\n                                // in createQrScanner reported that it's supported, see issue #98.\n                                // Service unavailable can happen after some time when the BarcodeDetector crashed and\n                                // can theoretically be recovered from by creating a new BarcodeDetector. However, in\n                                // newer browsers this issue does not seem to be present anymore and therefore we do not\n                                // apply this optimization anymore but just set _disableBarcodeDetector in both cases.\n                                // Also note that if we got an external qrEngine that crashed, we should possibly notify\n                                // the caller about it, but we also don't do this here, as it's such an unlikely case.\n                                QrScanner._disableBarcodeDetector = true;\n                                // retry without passing the broken BarcodeScanner instance\n                                return QrScanner.scanImage(imageOrFileOrBlobOrUrl, {\n                                    scanRegion,\n                                    canvas,\n                                    disallowCanvasResizing,\n                                    alsoTryWithoutScanRegion,\n                                });\n                            }\n                            throw `Scanner error: ${errorMessage}`;\n                        }\n                    })(),\n                ]);\n            }\n            return returnDetailedScanResult ? detailedScanResult : detailedScanResult.data;\n        } catch (e) {\n            if (!scanRegion || !alsoTryWithoutScanRegion) throw e;\n            const detailedScanResult = await QrScanner.scanImage(\n                imageOrFileOrBlobOrUrl,\n                { qrEngine, canvas, disallowCanvasResizing },\n            );\n            return returnDetailedScanResult ? detailedScanResult : detailedScanResult.data;\n        } finally {\n            if (!gotExternalEngine) {\n                QrScanner._postWorkerMessage(qrEngine!, 'close');\n            }\n        }\n    }\n\n    setGrayscaleWeights(red: number, green: number, blue: number, useIntegerApproximation: boolean = true): void {\n        // Note that for the native BarcodeDecoder or if the worker was destroyed, this is a no-op. However, the native\n        // implementations work also well with colored qr codes.\n        QrScanner._postWorkerMessage(\n            this._qrEnginePromise,\n            'grayscaleWeights',\n            { red, green, blue, useIntegerApproximation }\n        );\n    }\n\n    setInversionMode(inversionMode: QrScanner.InversionMode): void {\n        // Note that for the native BarcodeDecoder or if the worker was destroyed, this is a no-op. However, the native\n        // implementations scan normal and inverted qr codes by default\n        QrScanner._postWorkerMessage(this._qrEnginePromise, 'inversionMode', inversionMode);\n    }\n\n    static async createQrEngine(): Promise<Worker | BarcodeDetector>;\n    /** @deprecated */\n    static async createQrEngine(workerPath: string): Promise<Worker | BarcodeDetector>;\n    static async createQrEngine(workerPath?: string): Promise<Worker | BarcodeDetector> {\n        if (workerPath) {\n            console.warn('Specifying a worker path is not required and not supported anymore.');\n        }\n\n        // @ts-ignore no types defined for import\n        const createWorker = () => (import('./qr-scanner-worker.min.js') as Promise<{ createWorker: () => Worker }>)\n            .then((module) => module.createWorker());\n\n        const useBarcodeDetector = !QrScanner._disableBarcodeDetector\n            && 'BarcodeDetector' in window\n            && BarcodeDetector.getSupportedFormats\n            && (await BarcodeDetector.getSupportedFormats()).includes('qr_code');\n\n        if (!useBarcodeDetector) return createWorker();\n\n        // On Macs with an M1/M2 processor and macOS Ventura (macOS version 13), the BarcodeDetector is broken in\n        // Chromium based browsers, regardless of the version. For that constellation, the BarcodeDetector does not\n        // error but does not detect QR codes. Macs without an M1/M2 or before Ventura are fine.\n        // See issue #209 and https://bugs.chromium.org/p/chromium/issues/detail?id=1382442\n        // TODO update this once the issue in macOS is fixed\n        const userAgentData = navigator.userAgentData;\n        const isChromiumOnMacWithArmVentura = userAgentData // all Chromium browsers support userAgentData\n            && userAgentData.brands.some(({ brand }) => /Chromium/i.test(brand))\n            && /mac ?OS/i.test(userAgentData.platform)\n            // Does it have an ARM chip (e.g. M1/M2) and Ventura? Check this last as getHighEntropyValues can\n            // theoretically trigger a browser prompt, although no browser currently does seem to show one.\n            // If browser or user refused to return the requested values, assume broken ARM Ventura, to be safe.\n            && await userAgentData.getHighEntropyValues(['architecture', 'platformVersion'])\n                .then(({ architecture, platformVersion }) =>\n                    /arm/i.test(architecture || 'arm') && parseInt(platformVersion || '13') >= /* Ventura */ 13)\n                .catch(() => true);\n        if (isChromiumOnMacWithArmVentura) return createWorker();\n\n        return new BarcodeDetector({ formats: ['qr_code'] });\n    }\n\n    private _onPlay(): void {\n        this._scanRegion = this._calculateScanRegion(this.$video);\n        this._updateOverlay();\n        if (this.$overlay) {\n            this.$overlay.style.display = '';\n        }\n        this._scanFrame();\n    }\n\n    private _onLoadedMetaData(): void {\n        this._scanRegion = this._calculateScanRegion(this.$video);\n        this._updateOverlay();\n    }\n\n    private _onVisibilityChange(): void {\n        if (document.hidden) {\n            this.pause();\n        } else if (this._active) {\n            this.start();\n        }\n    }\n\n    private _calculateScanRegion(video: HTMLVideoElement): QrScanner.ScanRegion {\n        // Default scan region calculation. Note that this can be overwritten in the constructor.\n        const smallestDimension = Math.min(video.videoWidth, video.videoHeight);\n        const scanRegionSize = Math.round(2 / 3 * smallestDimension);\n        return {\n            x: Math.round((video.videoWidth - scanRegionSize) / 2),\n            y: Math.round((video.videoHeight - scanRegionSize) / 2),\n            width: scanRegionSize,\n            height: scanRegionSize,\n            downScaledWidth: this._legacyCanvasSize,\n            downScaledHeight: this._legacyCanvasSize,\n        };\n    }\n\n    private _updateOverlay(): void {\n        requestAnimationFrame(() => {\n            // Running in requestAnimationFrame which should avoid a potential additional re-flow for getComputedStyle\n            // and offsetWidth, offsetHeight, offsetLeft, offsetTop.\n            if (!this.$overlay) return;\n            const video = this.$video;\n            const videoWidth = video.videoWidth;\n            const videoHeight = video.videoHeight;\n            const elementWidth = video.offsetWidth;\n            const elementHeight = video.offsetHeight;\n            const elementX = video.offsetLeft;\n            const elementY = video.offsetTop;\n\n            const videoStyle = window.getComputedStyle(video);\n            const videoObjectFit = videoStyle.objectFit;\n            const videoAspectRatio = videoWidth / videoHeight;\n            const elementAspectRatio = elementWidth / elementHeight;\n            let videoScaledWidth: number;\n            let videoScaledHeight: number;\n            switch (videoObjectFit) {\n                case 'none':\n                    videoScaledWidth = videoWidth;\n                    videoScaledHeight = videoHeight;\n                    break;\n                case 'fill':\n                    videoScaledWidth = elementWidth;\n                    videoScaledHeight = elementHeight;\n                    break;\n                default: // 'cover', 'contains', 'scale-down'\n                    if (videoObjectFit === 'cover'\n                        ? videoAspectRatio > elementAspectRatio\n                        : videoAspectRatio < elementAspectRatio) {\n                        // The scaled height is the element height\n                        // - for 'cover' if the video aspect ratio is wider than the element aspect ratio\n                        //   (scaled height matches element height and scaled width overflows element width)\n                        // - for 'contains'/'scale-down' if element aspect ratio is wider than the video aspect ratio\n                        //   (scaled height matched element height and element width overflows scaled width)\n                        videoScaledHeight = elementHeight;\n                        videoScaledWidth = videoScaledHeight * videoAspectRatio;\n                    } else {\n                        videoScaledWidth = elementWidth;\n                        videoScaledHeight = videoScaledWidth / videoAspectRatio;\n                    }\n                    if (videoObjectFit === 'scale-down') {\n                        // for 'scale-down' the dimensions are the minimum of 'contains' and 'none'\n                        videoScaledWidth = Math.min(videoScaledWidth, videoWidth);\n                        videoScaledHeight = Math.min(videoScaledHeight, videoHeight);\n                    }\n            }\n\n            // getComputedStyle is so nice to convert keywords (left, center, right, top, bottom) to percent and makes\n            // sure to set the default of 50% if only one or no component was provided, therefore we can be sure that\n            // both components are set. Additionally, it converts units other than px (e.g. rem) to px.\n            const [videoX, videoY] = videoStyle.objectPosition.split(' ').map((length, i) => {\n                const lengthValue = parseFloat(length);\n                return length.endsWith('%')\n                    ? (!i ? elementWidth - videoScaledWidth : elementHeight - videoScaledHeight) * lengthValue / 100\n                    : lengthValue;\n            });\n\n            const regionWidth = this._scanRegion.width || videoWidth;\n            const regionHeight = this._scanRegion.height || videoHeight;\n            const regionX = this._scanRegion.x || 0;\n            const regionY = this._scanRegion.y || 0;\n\n            const overlayStyle = this.$overlay.style;\n            overlayStyle.width = `${regionWidth / videoWidth * videoScaledWidth}px`;\n            overlayStyle.height = `${regionHeight / videoHeight * videoScaledHeight}px`;\n            overlayStyle.top = `${elementY + videoY + regionY / videoHeight * videoScaledHeight}px`;\n            const isVideoMirrored = /scaleX\\(-1\\)/.test(video.style.transform!);\n            overlayStyle.left = `${elementX\n                + (isVideoMirrored ? elementWidth - videoX - videoScaledWidth : videoX)\n                + (isVideoMirrored ? videoWidth - regionX - regionWidth : regionX) / videoWidth * videoScaledWidth}px`;\n            // apply same mirror as on video\n            overlayStyle.transform = video.style.transform;\n        });\n    }\n\n    private static _convertPoints(\n        points: QrScanner.Point[],\n        scanRegion?: QrScanner.ScanRegion | null,\n    ): QrScanner.Point[] {\n        if (!scanRegion) return points;\n        const offsetX = scanRegion.x || 0;\n        const offsetY = scanRegion.y || 0;\n        const scaleFactorX = scanRegion.width && scanRegion.downScaledWidth\n            ? scanRegion.width / scanRegion.downScaledWidth\n            : 1;\n        const scaleFactorY = scanRegion.height && scanRegion.downScaledHeight\n            ? scanRegion.height / scanRegion.downScaledHeight\n            : 1;\n        for (const point of points) {\n            point.x = point.x * scaleFactorX + offsetX;\n            point.y = point.y * scaleFactorY + offsetY;\n        }\n        return points;\n    }\n\n    private _scanFrame(): void {\n        if (!this._active || this.$video.paused || this.$video.ended) return;\n        // If requestVideoFrameCallback is available use that to avoid unnecessary scans on the same frame as the\n        // camera's framerate can be lower than the screen refresh rate and this._maxScansPerSecond, especially in dark\n        // settings where the exposure time is longer. Both, requestVideoFrameCallback and requestAnimationFrame are not\n        // being fired if the tab is in the background, which is what we want.\n        const requestFrame = 'requestVideoFrameCallback' in this.$video\n            // @ts-ignore\n            ? this.$video.requestVideoFrameCallback.bind(this.$video)\n            : requestAnimationFrame;\n        requestFrame(async () => {\n            if (this.$video.readyState <= 1) {\n                // Skip scans until the video is ready as drawImage() only works correctly on a video with readyState\n                // > 1, see https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/drawImage#Notes.\n                // This also avoids false positives for videos paused after a successful scan which remains visible on\n                // the canvas until the video is started again and ready.\n                this._scanFrame();\n                return;\n            }\n\n            const timeSinceLastScan = Date.now() - this._lastScanTimestamp;\n            const minimumTimeBetweenScans = 1000 / this._maxScansPerSecond;\n            if (timeSinceLastScan < minimumTimeBetweenScans) {\n                await new Promise((resolve) => setTimeout(resolve, minimumTimeBetweenScans - timeSinceLastScan));\n            }\n            // console.log('Scan rate:', Math.round(1000 / (Date.now() - this._lastScanTimestamp)));\n            this._lastScanTimestamp = Date.now();\n\n            let result: QrScanner.ScanResult | undefined;\n            try {\n                result = await QrScanner.scanImage(this.$video, {\n                    scanRegion: this._scanRegion,\n                    qrEngine: this._qrEnginePromise,\n                    canvas: this.$canvas,\n                });\n            } catch (error) {\n                if (!this._active) return;\n                this._onDecodeError(error as Error | string);\n            }\n\n            if (QrScanner._disableBarcodeDetector && !(await this._qrEnginePromise instanceof Worker)) {\n                // replace the disabled BarcodeDetector\n                this._qrEnginePromise = QrScanner.createQrEngine();\n            }\n\n            if (result) {\n                if (this._onDecode) {\n                    this._onDecode(result);\n                } else if (this._legacyOnDecode) {\n                    this._legacyOnDecode(result.data);\n                }\n\n                if (this.$codeOutlineHighlight) {\n                    clearTimeout(this._codeOutlineHighlightRemovalTimeout);\n                    this._codeOutlineHighlightRemovalTimeout = undefined;\n                    this.$codeOutlineHighlight.setAttribute(\n                        'viewBox',\n                        `${this._scanRegion.x || 0} `\n                            + `${this._scanRegion.y || 0} `\n                            + `${this._scanRegion.width || this.$video.videoWidth} `\n                            + `${this._scanRegion.height || this.$video.videoHeight}`,\n                    );\n                    const polygon = this.$codeOutlineHighlight.firstElementChild!;\n                    polygon.setAttribute('points', result.cornerPoints.map(({x, y}) => `${x},${y}`).join(' '));\n                    this.$codeOutlineHighlight.style.display = '';\n                }\n            } else if (this.$codeOutlineHighlight && !this._codeOutlineHighlightRemovalTimeout) {\n                // hide after timeout to make it flash less when on some frames the QR code is detected and on some not\n                this._codeOutlineHighlightRemovalTimeout = setTimeout(\n                    () => this.$codeOutlineHighlight!.style.display = 'none',\n                    100,\n                );\n            }\n\n            this._scanFrame();\n        });\n    }\n\n    private _onDecodeError(error: Error | string): void {\n        // default error handler; can be overwritten in the constructor\n        if (error === QrScanner.NO_QR_CODE_FOUND) return;\n        console.log(error);\n    }\n\n    private async _getCameraStream(): Promise<{ stream: MediaStream, facingMode: QrScanner.FacingMode }> {\n        if (!navigator.mediaDevices) throw 'Camera not found.';\n\n        const preferenceType = /^(environment|user)$/.test(this._preferredCamera)\n            ? 'facingMode'\n            : 'deviceId';\n        const constraintsWithoutCamera: Array<MediaTrackConstraints> = [{\n            width: { min: 1024 }\n        }, {\n            width: { min: 768 }\n        }, {}];\n        const constraintsWithCamera = constraintsWithoutCamera.map((constraint) => Object.assign({}, constraint, {\n            [preferenceType]: { exact: this._preferredCamera },\n        }));\n\n        for (const constraints of [...constraintsWithCamera, ...constraintsWithoutCamera]) {\n            try {\n                const stream = await navigator.mediaDevices.getUserMedia({ video: constraints, audio: false });\n                // Try to determine the facing mode from the stream, otherwise use a guess or 'environment' as\n                // default. Note that the guess is not always accurate as Safari returns cameras of different facing\n                // mode, even for exact facingMode constraints.\n                const facingMode = this._getFacingMode(stream)\n                    || (constraints.facingMode\n                        ? this._preferredCamera as QrScanner.FacingMode // a facing mode we were able to fulfill\n                        : (this._preferredCamera === 'environment'\n                            ? 'user' // switch as _preferredCamera was environment but we are not able to fulfill it\n                            : 'environment' // switch from unfulfilled user facingMode or default to environment\n                        )\n                    );\n                return { stream, facingMode };\n            } catch (e) {}\n        }\n\n        throw 'Camera not found.';\n    }\n\n    private async _restartVideoStream(): Promise<void> {\n        // Note that we always pause the stream and not only if !this._paused as even if this._paused === true, the\n        // stream might still be running, as it's by default only stopped after a delay of 300ms.\n        const wasPaused = this._paused;\n        const paused = await this.pause(true);\n        if (!paused || wasPaused || !this._active) return;\n        await this.start();\n    }\n\n    private static _stopVideoStream(stream : MediaStream): void {\n        for (const track of stream.getTracks()) {\n            track.stop(); //  note that this will also automatically turn the flashlight off\n            stream.removeTrack(track);\n        }\n    }\n\n    private _setVideoMirror(facingMode: QrScanner.FacingMode): void {\n        // in user facing mode mirror the video to make it easier for the user to position the QR code\n        const scaleFactor = facingMode === 'user'? -1 : 1;\n        this.$video.style.transform = 'scaleX(' + scaleFactor + ')';\n    }\n\n    private _getFacingMode(videoStream: MediaStream): QrScanner.FacingMode | null {\n        const videoTrack = videoStream.getVideoTracks()[0];\n        if (!videoTrack) return null; // unknown\n        // inspired by https://github.com/JodusNodus/react-qr-reader/blob/master/src/getDeviceId.js#L13\n        return /rear|back|environment/i.test(videoTrack.label)\n            ? 'environment'\n            : /front|user|face/i.test(videoTrack.label)\n                ? 'user'\n                : null; // unknown\n    }\n\n    private static _drawToCanvas(\n        image: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap\n            | SVGImageElement,\n        scanRegion?: QrScanner.ScanRegion | null,\n        canvas?: HTMLCanvasElement | null,\n        disallowCanvasResizing= false,\n    ): [HTMLCanvasElement, CanvasRenderingContext2D] {\n        canvas = canvas || document.createElement('canvas');\n        const scanRegionX = scanRegion && scanRegion.x ? scanRegion.x : 0;\n        const scanRegionY = scanRegion && scanRegion.y ? scanRegion.y : 0;\n        const scanRegionWidth = scanRegion && scanRegion.width\n            ? scanRegion.width\n            : (image as HTMLVideoElement).videoWidth || image.width as number;\n        const scanRegionHeight = scanRegion && scanRegion.height\n            ? scanRegion.height\n            : (image as HTMLVideoElement).videoHeight || image.height as number;\n\n        if (!disallowCanvasResizing) {\n            const canvasWidth = scanRegion && scanRegion.downScaledWidth\n                ? scanRegion.downScaledWidth\n                : scanRegionWidth;\n            const canvasHeight = scanRegion && scanRegion.downScaledHeight\n                ? scanRegion.downScaledHeight\n                : scanRegionHeight;\n            // Setting the canvas width or height clears the canvas, even if the values didn't change, therefore only\n            // set them if they actually changed.\n            if (canvas.width !== canvasWidth) {\n                canvas.width = canvasWidth;\n            }\n            if (canvas.height !== canvasHeight) {\n                canvas.height = canvasHeight;\n            }\n        }\n\n        const context = canvas.getContext('2d', { alpha: false })!;\n        context.imageSmoothingEnabled = false; // gives less blurry images\n        context.drawImage(\n            image,\n            scanRegionX, scanRegionY, scanRegionWidth, scanRegionHeight,\n            0, 0, canvas.width, canvas.height,\n        );\n        return [canvas, context];\n    }\n\n    private static async _loadImage(\n        imageOrFileOrBlobOrUrl: HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap\n            | SVGImageElement | File | Blob | URL | String,\n    ): Promise<HTMLImageElement | HTMLVideoElement | HTMLCanvasElement | OffscreenCanvas | ImageBitmap\n        | SVGImageElement > {\n        if (imageOrFileOrBlobOrUrl instanceof Image) {\n            await QrScanner._awaitImageLoad(imageOrFileOrBlobOrUrl);\n            return imageOrFileOrBlobOrUrl;\n        } else if (imageOrFileOrBlobOrUrl instanceof HTMLVideoElement\n            || imageOrFileOrBlobOrUrl instanceof HTMLCanvasElement\n            || imageOrFileOrBlobOrUrl instanceof SVGImageElement\n            || 'OffscreenCanvas' in window && imageOrFileOrBlobOrUrl instanceof OffscreenCanvas\n            || 'ImageBitmap' in window && imageOrFileOrBlobOrUrl instanceof ImageBitmap) {\n            return imageOrFileOrBlobOrUrl;\n        } else if (imageOrFileOrBlobOrUrl instanceof File || imageOrFileOrBlobOrUrl instanceof Blob\n            || imageOrFileOrBlobOrUrl instanceof URL || typeof imageOrFileOrBlobOrUrl === 'string') {\n            const image = new Image();\n            if (imageOrFileOrBlobOrUrl instanceof File || imageOrFileOrBlobOrUrl instanceof Blob) {\n                image.src = URL.createObjectURL(imageOrFileOrBlobOrUrl);\n            } else {\n                image.src = imageOrFileOrBlobOrUrl.toString();\n            }\n            try {\n                await QrScanner._awaitImageLoad(image);\n                return image;\n            } finally {\n                if (imageOrFileOrBlobOrUrl instanceof File || imageOrFileOrBlobOrUrl instanceof Blob) {\n                    URL.revokeObjectURL(image.src);\n                }\n            }\n        } else {\n            throw 'Unsupported image type.';\n        }\n    }\n\n    private static async _awaitImageLoad(image: HTMLImageElement): Promise<void> {\n        if (image.complete && image.naturalWidth !== 0) return; // already loaded\n        await new Promise<void>((resolve, reject) => {\n            const listener = (event: ErrorEvent | Event) => {\n                image.removeEventListener('load', listener);\n                image.removeEventListener('error', listener);\n                if (event instanceof ErrorEvent) {\n                    reject('Image load error');\n                } else {\n                    resolve();\n                }\n            };\n            image.addEventListener('load', listener);\n            image.addEventListener('error', listener);\n        });\n    }\n\n    private static async _postWorkerMessage(\n        qrEngineOrQrEnginePromise: Worker | BarcodeDetector | Promise<Worker | BarcodeDetector>,\n        type: string,\n        data?: any,\n        transfer?: Transferable[],\n    ): Promise<number> {\n        return QrScanner._postWorkerMessageSync(await qrEngineOrQrEnginePromise, type, data, transfer);\n    }\n\n    // sync version of _postWorkerMessage without performance overhead of async functions\n    private static _postWorkerMessageSync(\n        qrEngine: Worker | BarcodeDetector,\n        type: string,\n        data?: any,\n        transfer?: Transferable[],\n    ): number {\n        if (!(qrEngine instanceof Worker)) return -1;\n        const id = QrScanner._workerMessageId++;\n        qrEngine.postMessage({\n            id,\n            type,\n            data,\n        }, transfer);\n        return id;\n    }\n}\n\ndeclare namespace QrScanner {\n    export interface ScanRegion {\n        x?: number;\n        y?: number;\n        width?: number;\n        height?: number;\n        downScaledWidth?: number;\n        downScaledHeight?: number;\n    }\n\n    export type FacingMode = 'environment' | 'user';\n    export type DeviceId = string;\n\n    export interface Camera {\n        id: DeviceId;\n        label: string;\n    }\n\n    export type InversionMode = 'original' | 'invert' | 'both';\n\n    export interface Point {\n        x: number;\n        y: number;\n    }\n\n    export interface ScanResult {\n        data: string;\n        // In clockwise order, starting at top left, but this might not be guaranteed in the future.\n        cornerPoints: QrScanner.Point[];\n    }\n}\n\n// simplified from https://wicg.github.io/shape-detection-api/#barcode-detection-api\ndeclare class BarcodeDetector {\n    constructor(options?: { formats: string[] });\n    static getSupportedFormats(): Promise<string[]>;\n    detect(image: ImageBitmapSource): Promise<Array<{ rawValue: string, cornerPoints: QrScanner.Point[] }>>;\n}\n\n// simplified from https://github.com/lukewarlow/user-agent-data-types/blob/master/index.d.ts\ndeclare global {\n    interface Navigator {\n        readonly userAgentData?: {\n            readonly platform: string;\n          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\ No newline at end of file
diff --git a/require/js/qrscan.js b/require/js/qrscan.js
new file mode 100644
index 0000000..77ec3d3
--- /dev/null
+++ b/require/js/qrscan.js
@@ -0,0 +1,65 @@
+import QrScanner from "./qr-scanner/qr-scanner.min.js";
+
+const video = document.querySelector("video");
+const camList = document.querySelector("select");
+const fileSelector = document.querySelector("input[type='file']");
+
+function scanAction(result) {
+    console.log(result.data);
+}
+
+function checkCam(hasCamera) {
+    const errorP = document.querySelector("article p:first-of-type");
+    if (!hasCamera) {
+        errorP.innerHTML = "⚠️ Aucune caméra détectée !";
+    }
+    else {
+        errorP.text = "";
+    }
+}
+
+const scanner = new QrScanner(
+    video,
+    result => scanAction(result),
+    {
+        highlightScanRegion: true,
+        highlightCodeOutline: true,
+    }
+);
+
+window.scanner = scanner; // Débogage
+
+
+// Changement de caméra :
+camList.addEventListener("change", event => {
+    scanner.setCamera(event.target.value);
+});
+
+// Démarrage du scan :
+document.querySelector("button").addEventListener("click", () => {
+    scanner.start().then(() => {
+        QrScanner.listCameras(true).then(cameras => cameras.forEach(camera =>
+            {
+                const option = document.createElement("option");
+                option.value = camera.id;
+                option.text = camera.label;
+                camList.add(option);
+            }
+        ));
+    });
+    QrScanner.hasCamera().then(hasCamera => checkCam(hasCamera));
+});
+
+// // Arrêt du scan :
+// document.querySelector("nav button:nth-of-type(2)").addEventListener("click", () => {
+//     scanner.stop();
+// });
+
+// Scan de fichier :
+fileSelector.addEventListener("change", () => {
+    const file = fileSelector.files[0];
+    if (file) {
+        QrScanner.scanImage(file, {returnDetailedScanResult: true})
+                 .then(result => scanAction(result));
+    }
+});
\ No newline at end of file
diff --git a/require/locales/fr.php b/require/locales/fr.php
index 1bec511..c78b9bc 100644
--- a/require/locales/fr.php
+++ b/require/locales/fr.php
@@ -5,12 +5,12 @@
             "article" => "",
         ],
         "page_title" => [
-            "home" => "",
+            "home" => "Accueil",
             "article" => "",
         ],
         "home" => [
-            "subtitle" => "",
-            "message" => "",
+            "subtitle" => "Bienvenue !",
+            "message" => "Page dédiée au test de scan de QR code.",
             "art_but" => "Voir ",
         ],
         "nav" => [
diff --git a/style.css b/style.css
index 171d16b..49cac38 100644
--- a/style.css
+++ b/style.css
@@ -252,8 +252,9 @@ main p {
 
 main nav {
     width: 100%;
-    display: grid;
-    grid-template-columns: repeat(3, 1fr);
+    display: flex;
+    flex-direction: column;
+    /* grid-template-columns: repeat(3, 1fr); */
     gap: 15px;
 }
 
@@ -266,8 +267,10 @@ main article p {
 }
 
 main > article {
+    /* display: flex;
+    flex-direction: row; */
     display: flex;
-    flex-direction: row;
+    flex-direction: column;
     gap: 15px;
 }
 
@@ -299,6 +302,10 @@ section article {
     justify-content: center;
 }
 
+article p:first-of-type {
+    text-align: center;
+}
+
 footer {
     border-style: dashed;
     border-color: var(--bg-light);
@@ -312,6 +319,10 @@ footer > p {
     font-size: smaller;
 }
 
+video {
+    max-height: 200px;
+}
+
 .error {
     background: #cc0000 !important;
 }
