From c8d32f03273a3a550aa44e26807dfcf5f6afe610 Mon Sep 17 00:00:00 2001
From: Evan Hahn <69474926+EvanHahn-Signal@users.noreply.github.com>
Date: Wed, 5 Jan 2022 11:59:59 -0600
Subject: [PATCH] Switch to qrcode-generator library

---
 .storybook/preview-head.html                  |   3 +-
 ACKNOWLEDGMENTS.md                            |   4 +
 components/qrcode/qrcode.js                   | 609 ------------------
 package.json                                  |   1 +
 .../InstallScreenQrCodeNotScannedStep.scss    |   4 +-
 ts/components/QrCode.stories.tsx              |  17 +
 ts/components/QrCode.tsx                      |  61 ++
 .../InstallScreenQrCodeNotScannedStep.tsx     |  37 +-
 ts/hooks/useDevicePixelRatio.ts               |  27 +
 ts/scripts/copy-and-concat.ts                 |   3 +-
 ts/util/lint/exceptions.json                  |  48 +-
 ts/util/lint/license_comments.ts              |   3 +-
 ts/window.d.ts                                |  29 +-
 yarn.lock                                     |   5 +
 14 files changed, 155 insertions(+), 696 deletions(-)
 delete mode 100644 components/qrcode/qrcode.js
 create mode 100644 ts/components/QrCode.stories.tsx
 create mode 100644 ts/components/QrCode.tsx
 create mode 100644 ts/hooks/useDevicePixelRatio.ts

diff --git a/.storybook/preview-head.html b/.storybook/preview-head.html
index 7a79340e4bc3..9768dffa7d58 100644
--- a/.storybook/preview-head.html
+++ b/.storybook/preview-head.html
@@ -1,9 +1,8 @@
-<!-- Copyright 2019-2021 Signal Messenger, LLC -->
+<!-- Copyright 2019-2022 Signal Messenger, LLC -->
 <!-- SPDX-License-Identifier: AGPL-3.0-only -->
 
 <!-- prettier-ignore -->
 <link rel="stylesheet" href="../stylesheets/manifest.css" />
-<script src="../components/qrcode/qrcode.js"></script>
 <script>
   window.SignalWindow = window.SignalWindow || {};
   window.SignalWindow.log = {
diff --git a/ACKNOWLEDGMENTS.md b/ACKNOWLEDGMENTS.md
index 7521219bd4e8..ab977b836885 100644
--- a/ACKNOWLEDGMENTS.md
+++ b/ACKNOWLEDGMENTS.md
@@ -2600,6 +2600,10 @@ Signal Desktop makes use of the following open source projects.
 
     License: MIT
 
+## qrcode-generator
+
+    License: MIT
+
 ## quill
 
     Copyright (c) 2014, Jason Chen
diff --git a/components/qrcode/qrcode.js b/components/qrcode/qrcode.js
deleted file mode 100644
index c1217a383bbb..000000000000
--- a/components/qrcode/qrcode.js
+++ /dev/null
@@ -1,609 +0,0 @@
-/**
- * @fileoverview
- * - Using the 'QRCode for Javascript library'
- * - Fixed dataset of 'QRCode for Javascript library' for support full-spec.
- * - this library has no dependencies.
- * 
- * @author davidshimjs
- * @see <a href="http://www.d-project.com/" target="_blank">http://www.d-project.com/</a>
- * @see <a href="http://jeromeetienne.github.com/jquery-qrcode/" target="_blank">http://jeromeetienne.github.com/jquery-qrcode/</a>
- */
-var QRCode;
-
-(function () {
-	//---------------------------------------------------------------------
-	// QRCode for JavaScript
-	//
-	// Copyright (c) 2009 Kazuhiko Arase
-	//
-	// URL: http://www.d-project.com/
-	//
-	// Licensed under the MIT license:
-	//   http://www.opensource.org/licenses/mit-license.php
-	//
-	// The word "QR Code" is registered trademark of 
-	// DENSO WAVE INCORPORATED
-	//   http://www.denso-wave.com/qrcode/faqpatent-e.html
-	//
-	//---------------------------------------------------------------------
-	function QR8bitByte(data) {
-		this.mode = QRMode.MODE_8BIT_BYTE;
-		this.data = data;
-		this.parsedData = [];
-
-		// Added to support UTF-8 Characters
-		for (var i = 0, l = this.data.length; i < l; i++) {
-			var byteArray = [];
-			var code = this.data.charCodeAt(i);
-
-			if (code > 0x10000) {
-				byteArray[0] = 0xF0 | ((code & 0x1C0000) >>> 18);
-				byteArray[1] = 0x80 | ((code & 0x3F000) >>> 12);
-				byteArray[2] = 0x80 | ((code & 0xFC0) >>> 6);
-				byteArray[3] = 0x80 | (code & 0x3F);
-			} else if (code > 0x800) {
-				byteArray[0] = 0xE0 | ((code & 0xF000) >>> 12);
-				byteArray[1] = 0x80 | ((code & 0xFC0) >>> 6);
-				byteArray[2] = 0x80 | (code & 0x3F);
-			} else if (code > 0x80) {
-				byteArray[0] = 0xC0 | ((code & 0x7C0) >>> 6);
-				byteArray[1] = 0x80 | (code & 0x3F);
-			} else {
-				byteArray[0] = code;
-			}
-
-			this.parsedData.push(byteArray);
-		}
-
-		this.parsedData = Array.prototype.concat.apply([], this.parsedData);
-
-		if (this.parsedData.length != this.data.length) {
-			this.parsedData.unshift(191);
-			this.parsedData.unshift(187);
-			this.parsedData.unshift(239);
-		}
-	}
-
-	QR8bitByte.prototype = {
-		getLength: function (buffer) {
-			return this.parsedData.length;
-		},
-		write: function (buffer) {
-			for (var i = 0, l = this.parsedData.length; i < l; i++) {
-				buffer.put(this.parsedData[i], 8);
-			}
-		}
-	};
-
-	function QRCodeModel(typeNumber, errorCorrectLevel) {
-		this.typeNumber = typeNumber;
-		this.errorCorrectLevel = errorCorrectLevel;
-		this.modules = null;
-		this.moduleCount = 0;
-		this.dataCache = null;
-		this.dataList = [];
-	}
-
-	QRCodeModel.prototype={addData:function(data){var newData=new QR8bitByte(data);this.dataList.push(newData);this.dataCache=null;},isDark:function(row,col){if(row<0||this.moduleCount<=row||col<0||this.moduleCount<=col){throw new Error(row+","+col);}
-	return this.modules[row][col];},getModuleCount:function(){return this.moduleCount;},make:function(){this.makeImpl(false,this.getBestMaskPattern());},makeImpl:function(test,maskPattern){this.moduleCount=this.typeNumber*4+17;this.modules=new Array(this.moduleCount);for(var row=0;row<this.moduleCount;row++){this.modules[row]=new Array(this.moduleCount);for(var col=0;col<this.moduleCount;col++){this.modules[row][col]=null;}}
-	this.setupPositionProbePattern(0,0);this.setupPositionProbePattern(this.moduleCount-7,0);this.setupPositionProbePattern(0,this.moduleCount-7);this.setupPositionAdjustPattern();this.setupTimingPattern();this.setupTypeInfo(test,maskPattern);if(this.typeNumber>=7){this.setupTypeNumber(test);}
-	if(this.dataCache==null){this.dataCache=QRCodeModel.createData(this.typeNumber,this.errorCorrectLevel,this.dataList);}
-	this.mapData(this.dataCache,maskPattern);},setupPositionProbePattern:function(row,col){for(var r=-1;r<=7;r++){if(row+r<=-1||this.moduleCount<=row+r)continue;for(var c=-1;c<=7;c++){if(col+c<=-1||this.moduleCount<=col+c)continue;if((0<=r&&r<=6&&(c==0||c==6))||(0<=c&&c<=6&&(r==0||r==6))||(2<=r&&r<=4&&2<=c&&c<=4)){this.modules[row+r][col+c]=true;}else{this.modules[row+r][col+c]=false;}}}},getBestMaskPattern:function(){var minLostPoint=0;var pattern=0;for(var i=0;i<8;i++){this.makeImpl(true,i);var lostPoint=QRUtil.getLostPoint(this);if(i==0||minLostPoint>lostPoint){minLostPoint=lostPoint;pattern=i;}}
-	return pattern;},createMovieClip:function(target_mc,instance_name,depth){var qr_mc=target_mc.createEmptyMovieClip(instance_name,depth);var cs=1;this.make();for(var row=0;row<this.modules.length;row++){var y=row*cs;for(var col=0;col<this.modules[row].length;col++){var x=col*cs;var dark=this.modules[row][col];if(dark){qr_mc.beginFill(0,100);qr_mc.moveTo(x,y);qr_mc.lineTo(x+cs,y);qr_mc.lineTo(x+cs,y+cs);qr_mc.lineTo(x,y+cs);qr_mc.endFill();}}}
-	return qr_mc;},setupTimingPattern:function(){for(var r=8;r<this.moduleCount-8;r++){if(this.modules[r][6]!=null){continue;}
-	this.modules[r][6]=(r%2==0);}
-	for(var c=8;c<this.moduleCount-8;c++){if(this.modules[6][c]!=null){continue;}
-	this.modules[6][c]=(c%2==0);}},setupPositionAdjustPattern:function(){var pos=QRUtil.getPatternPosition(this.typeNumber);for(var i=0;i<pos.length;i++){for(var j=0;j<pos.length;j++){var row=pos[i];var col=pos[j];if(this.modules[row][col]!=null){continue;}
-	for(var r=-2;r<=2;r++){for(var c=-2;c<=2;c++){if(r==-2||r==2||c==-2||c==2||(r==0&&c==0)){this.modules[row+r][col+c]=true;}else{this.modules[row+r][col+c]=false;}}}}}},setupTypeNumber:function(test){var bits=QRUtil.getBCHTypeNumber(this.typeNumber);for(var i=0;i<18;i++){var mod=(!test&&((bits>>i)&1)==1);this.modules[Math.floor(i/3)][i%3+this.moduleCount-8-3]=mod;}
-	for(var i=0;i<18;i++){var mod=(!test&&((bits>>i)&1)==1);this.modules[i%3+this.moduleCount-8-3][Math.floor(i/3)]=mod;}},setupTypeInfo:function(test,maskPattern){var data=(this.errorCorrectLevel<<3)|maskPattern;var bits=QRUtil.getBCHTypeInfo(data);for(var i=0;i<15;i++){var mod=(!test&&((bits>>i)&1)==1);if(i<6){this.modules[i][8]=mod;}else if(i<8){this.modules[i+1][8]=mod;}else{this.modules[this.moduleCount-15+i][8]=mod;}}
-	for(var i=0;i<15;i++){var mod=(!test&&((bits>>i)&1)==1);if(i<8){this.modules[8][this.moduleCount-i-1]=mod;}else if(i<9){this.modules[8][15-i-1+1]=mod;}else{this.modules[8][15-i-1]=mod;}}
-	this.modules[this.moduleCount-8][8]=(!test);},mapData:function(data,maskPattern){var inc=-1;var row=this.moduleCount-1;var bitIndex=7;var byteIndex=0;for(var col=this.moduleCount-1;col>0;col-=2){if(col==6)col--;while(true){for(var c=0;c<2;c++){if(this.modules[row][col-c]==null){var dark=false;if(byteIndex<data.length){dark=(((data[byteIndex]>>>bitIndex)&1)==1);}
-	var mask=QRUtil.getMask(maskPattern,row,col-c);if(mask){dark=!dark;}
-	this.modules[row][col-c]=dark;bitIndex--;if(bitIndex==-1){byteIndex++;bitIndex=7;}}}
-	row+=inc;if(row<0||this.moduleCount<=row){row-=inc;inc=-inc;break;}}}}};QRCodeModel.PAD0=0xEC;QRCodeModel.PAD1=0x11;QRCodeModel.createData=function(typeNumber,errorCorrectLevel,dataList){var rsBlocks=QRRSBlock.getRSBlocks(typeNumber,errorCorrectLevel);var buffer=new QRBitBuffer();for(var i=0;i<dataList.length;i++){var data=dataList[i];buffer.put(data.mode,4);buffer.put(data.getLength(),QRUtil.getLengthInBits(data.mode,typeNumber));data.write(buffer);}
-	var totalDataCount=0;for(var i=0;i<rsBlocks.length;i++){totalDataCount+=rsBlocks[i].dataCount;}
-	if(buffer.getLengthInBits()>totalDataCount*8){throw new Error("code length overflow. ("
-	+buffer.getLengthInBits()
-	+">"
-	+totalDataCount*8
-	+")");}
-	if(buffer.getLengthInBits()+4<=totalDataCount*8){buffer.put(0,4);}
-	while(buffer.getLengthInBits()%8!=0){buffer.putBit(false);}
-	while(true){if(buffer.getLengthInBits()>=totalDataCount*8){break;}
-	buffer.put(QRCodeModel.PAD0,8);if(buffer.getLengthInBits()>=totalDataCount*8){break;}
-	buffer.put(QRCodeModel.PAD1,8);}
-	return QRCodeModel.createBytes(buffer,rsBlocks);};QRCodeModel.createBytes=function(buffer,rsBlocks){var offset=0;var maxDcCount=0;var maxEcCount=0;var dcdata=new Array(rsBlocks.length);var ecdata=new Array(rsBlocks.length);for(var r=0;r<rsBlocks.length;r++){var dcCount=rsBlocks[r].dataCount;var ecCount=rsBlocks[r].totalCount-dcCount;maxDcCount=Math.max(maxDcCount,dcCount);maxEcCount=Math.max(maxEcCount,ecCount);dcdata[r]=new Array(dcCount);for(var i=0;i<dcdata[r].length;i++){dcdata[r][i]=0xff&buffer.buffer[i+offset];}
-	offset+=dcCount;var rsPoly=QRUtil.getErrorCorrectPolynomial(ecCount);var rawPoly=new QRPolynomial(dcdata[r],rsPoly.getLength()-1);var modPoly=rawPoly.mod(rsPoly);ecdata[r]=new Array(rsPoly.getLength()-1);for(var i=0;i<ecdata[r].length;i++){var modIndex=i+modPoly.getLength()-ecdata[r].length;ecdata[r][i]=(modIndex>=0)?modPoly.get(modIndex):0;}}
-	var totalCodeCount=0;for(var i=0;i<rsBlocks.length;i++){totalCodeCount+=rsBlocks[i].totalCount;}
-	var data=new Array(totalCodeCount);var index=0;for(var i=0;i<maxDcCount;i++){for(var r=0;r<rsBlocks.length;r++){if(i<dcdata[r].length){data[index++]=dcdata[r][i];}}}
-	for(var i=0;i<maxEcCount;i++){for(var r=0;r<rsBlocks.length;r++){if(i<ecdata[r].length){data[index++]=ecdata[r][i];}}}
-	return data;};var QRMode={MODE_NUMBER:1<<0,MODE_ALPHA_NUM:1<<1,MODE_8BIT_BYTE:1<<2,MODE_KANJI:1<<3};var QRErrorCorrectLevel={L:1,M:0,Q:3,H:2};var QRMaskPattern={PATTERN000:0,PATTERN001:1,PATTERN010:2,PATTERN011:3,PATTERN100:4,PATTERN101:5,PATTERN110:6,PATTERN111:7};var QRUtil={PATTERN_POSITION_TABLE:[[],[6,18],[6,22],[6,26],[6,30],[6,34],[6,22,38],[6,24,42],[6,26,46],[6,28,50],[6,30,54],[6,32,58],[6,34,62],[6,26,46,66],[6,26,48,70],[6,26,50,74],[6,30,54,78],[6,30,56,82],[6,30,58,86],[6,34,62,90],[6,28,50,72,94],[6,26,50,74,98],[6,30,54,78,102],[6,28,54,80,106],[6,32,58,84,110],[6,30,58,86,114],[6,34,62,90,118],[6,26,50,74,98,122],[6,30,54,78,102,126],[6,26,52,78,104,130],[6,30,56,82,108,134],[6,34,60,86,112,138],[6,30,58,86,114,142],[6,34,62,90,118,146],[6,30,54,78,102,126,150],[6,24,50,76,102,128,154],[6,28,54,80,106,132,158],[6,32,58,84,110,136,162],[6,26,54,82,110,138,166],[6,30,58,86,114,142,170]],G15:(1<<10)|(1<<8)|(1<<5)|(1<<4)|(1<<2)|(1<<1)|(1<<0),G18:(1<<12)|(1<<11)|(1<<10)|(1<<9)|(1<<8)|(1<<5)|(1<<2)|(1<<0),G15_MASK:(1<<14)|(1<<12)|(1<<10)|(1<<4)|(1<<1),getBCHTypeInfo:function(data){var d=data<<10;while(QRUtil.getBCHDigit(d)-QRUtil.getBCHDigit(QRUtil.G15)>=0){d^=(QRUtil.G15<<(QRUtil.getBCHDigit(d)-QRUtil.getBCHDigit(QRUtil.G15)));}
-	return((data<<10)|d)^QRUtil.G15_MASK;},getBCHTypeNumber:function(data){var d=data<<12;while(QRUtil.getBCHDigit(d)-QRUtil.getBCHDigit(QRUtil.G18)>=0){d^=(QRUtil.G18<<(QRUtil.getBCHDigit(d)-QRUtil.getBCHDigit(QRUtil.G18)));}
-	return(data<<12)|d;},getBCHDigit:function(data){var digit=0;while(data!=0){digit++;data>>>=1;}
-	return digit;},getPatternPosition:function(typeNumber){return QRUtil.PATTERN_POSITION_TABLE[typeNumber-1];},getMask:function(maskPattern,i,j){switch(maskPattern){case QRMaskPattern.PATTERN000:return(i+j)%2==0;case QRMaskPattern.PATTERN001:return i%2==0;case QRMaskPattern.PATTERN010:return j%3==0;case QRMaskPattern.PATTERN011:return(i+j)%3==0;case QRMaskPattern.PATTERN100:return(Math.floor(i/2)+Math.floor(j/3))%2==0;case QRMaskPattern.PATTERN101:return(i*j)%2+(i*j)%3==0;case QRMaskPattern.PATTERN110:return((i*j)%2+(i*j)%3)%2==0;case QRMaskPattern.PATTERN111:return((i*j)%3+(i+j)%2)%2==0;default:throw new Error("bad maskPattern:"+maskPattern);}},getErrorCorrectPolynomial:function(errorCorrectLength){var a=new QRPolynomial([1],0);for(var i=0;i<errorCorrectLength;i++){a=a.multiply(new QRPolynomial([1,QRMath.gexp(i)],0));}
-	return a;},getLengthInBits:function(mode,type){if(1<=type&&type<10){switch(mode){case QRMode.MODE_NUMBER:return 10;case QRMode.MODE_ALPHA_NUM:return 9;case QRMode.MODE_8BIT_BYTE:return 8;case QRMode.MODE_KANJI:return 8;default:throw new Error("mode:"+mode);}}else if(type<27){switch(mode){case QRMode.MODE_NUMBER:return 12;case QRMode.MODE_ALPHA_NUM:return 11;case QRMode.MODE_8BIT_BYTE:return 16;case QRMode.MODE_KANJI:return 10;default:throw new Error("mode:"+mode);}}else if(type<41){switch(mode){case QRMode.MODE_NUMBER:return 14;case QRMode.MODE_ALPHA_NUM:return 13;case QRMode.MODE_8BIT_BYTE:return 16;case QRMode.MODE_KANJI:return 12;default:throw new Error("mode:"+mode);}}else{throw new Error("type:"+type);}},getLostPoint:function(qrCode){var moduleCount=qrCode.getModuleCount();var lostPoint=0;for(var row=0;row<moduleCount;row++){for(var col=0;col<moduleCount;col++){var sameCount=0;var dark=qrCode.isDark(row,col);for(var r=-1;r<=1;r++){if(row+r<0||moduleCount<=row+r){continue;}
-	for(var c=-1;c<=1;c++){if(col+c<0||moduleCount<=col+c){continue;}
-	if(r==0&&c==0){continue;}
-	if(dark==qrCode.isDark(row+r,col+c)){sameCount++;}}}
-	if(sameCount>5){lostPoint+=(3+sameCount-5);}}}
-	for(var row=0;row<moduleCount-1;row++){for(var col=0;col<moduleCount-1;col++){var count=0;if(qrCode.isDark(row,col))count++;if(qrCode.isDark(row+1,col))count++;if(qrCode.isDark(row,col+1))count++;if(qrCode.isDark(row+1,col+1))count++;if(count==0||count==4){lostPoint+=3;}}}
-	for(var row=0;row<moduleCount;row++){for(var col=0;col<moduleCount-6;col++){if(qrCode.isDark(row,col)&&!qrCode.isDark(row,col+1)&&qrCode.isDark(row,col+2)&&qrCode.isDark(row,col+3)&&qrCode.isDark(row,col+4)&&!qrCode.isDark(row,col+5)&&qrCode.isDark(row,col+6)){lostPoint+=40;}}}
-	for(var col=0;col<moduleCount;col++){for(var row=0;row<moduleCount-6;row++){if(qrCode.isDark(row,col)&&!qrCode.isDark(row+1,col)&&qrCode.isDark(row+2,col)&&qrCode.isDark(row+3,col)&&qrCode.isDark(row+4,col)&&!qrCode.isDark(row+5,col)&&qrCode.isDark(row+6,col)){lostPoint+=40;}}}
-	var darkCount=0;for(var col=0;col<moduleCount;col++){for(var row=0;row<moduleCount;row++){if(qrCode.isDark(row,col)){darkCount++;}}}
-	var ratio=Math.abs(100*darkCount/moduleCount/moduleCount-50)/5;lostPoint+=ratio*10;return lostPoint;}};var QRMath={glog:function(n){if(n<1){throw new Error("glog("+n+")");}
-	return QRMath.LOG_TABLE[n];},gexp:function(n){while(n<0){n+=255;}
-	while(n>=256){n-=255;}
-	return QRMath.EXP_TABLE[n];},EXP_TABLE:new Array(256),LOG_TABLE:new Array(256)};for(var i=0;i<8;i++){QRMath.EXP_TABLE[i]=1<<i;}
-	for(var i=8;i<256;i++){QRMath.EXP_TABLE[i]=QRMath.EXP_TABLE[i-4]^QRMath.EXP_TABLE[i-5]^QRMath.EXP_TABLE[i-6]^QRMath.EXP_TABLE[i-8];}
-	for(var i=0;i<255;i++){QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]]=i;}
-	function QRPolynomial(num,shift){if(num.length==undefined){throw new Error(num.length+"/"+shift);}
-	var offset=0;while(offset<num.length&&num[offset]==0){offset++;}
-	this.num=new Array(num.length-offset+shift);for(var i=0;i<num.length-offset;i++){this.num[i]=num[i+offset];}}
-	QRPolynomial.prototype={get:function(index){return this.num[index];},getLength:function(){return this.num.length;},multiply:function(e){var num=new Array(this.getLength()+e.getLength()-1);for(var i=0;i<this.getLength();i++){for(var j=0;j<e.getLength();j++){num[i+j]^=QRMath.gexp(QRMath.glog(this.get(i))+QRMath.glog(e.get(j)));}}
-	return new QRPolynomial(num,0);},mod:function(e){if(this.getLength()-e.getLength()<0){return this;}
-	var ratio=QRMath.glog(this.get(0))-QRMath.glog(e.get(0));var num=new Array(this.getLength());for(var i=0;i<this.getLength();i++){num[i]=this.get(i);}
-	for(var i=0;i<e.getLength();i++){num[i]^=QRMath.gexp(QRMath.glog(e.get(i))+ratio);}
-	return new QRPolynomial(num,0).mod(e);}};function QRRSBlock(totalCount,dataCount){this.totalCount=totalCount;this.dataCount=dataCount;}
-	QRRSBlock.RS_BLOCK_TABLE=[[1,26,19],[1,26,16],[1,26,13],[1,26,9],[1,44,34],[1,44,28],[1,44,22],[1,44,16],[1,70,55],[1,70,44],[2,35,17],[2,35,13],[1,100,80],[2,50,32],[2,50,24],[4,25,9],[1,134,108],[2,67,43],[2,33,15,2,34,16],[2,33,11,2,34,12],[2,86,68],[4,43,27],[4,43,19],[4,43,15],[2,98,78],[4,49,31],[2,32,14,4,33,15],[4,39,13,1,40,14],[2,121,97],[2,60,38,2,61,39],[4,40,18,2,41,19],[4,40,14,2,41,15],[2,146,116],[3,58,36,2,59,37],[4,36,16,4,37,17],[4,36,12,4,37,13],[2,86,68,2,87,69],[4,69,43,1,70,44],[6,43,19,2,44,20],[6,43,15,2,44,16],[4,101,81],[1,80,50,4,81,51],[4,50,22,4,51,23],[3,36,12,8,37,13],[2,116,92,2,117,93],[6,58,36,2,59,37],[4,46,20,6,47,21],[7,42,14,4,43,15],[4,133,107],[8,59,37,1,60,38],[8,44,20,4,45,21],[12,33,11,4,34,12],[3,145,115,1,146,116],[4,64,40,5,65,41],[11,36,16,5,37,17],[11,36,12,5,37,13],[5,109,87,1,110,88],[5,65,41,5,66,42],[5,54,24,7,55,25],[11,36,12],[5,122,98,1,123,99],[7,73,45,3,74,46],[15,43,19,2,44,20],[3,45,15,13,46,16],[1,135,107,5,136,108],[10,74,46,1,75,47],[1,50,22,15,51,23],[2,42,14,17,43,15],[5,150,120,1,151,121],[9,69,43,4,70,44],[17,50,22,1,51,23],[2,42,14,19,43,15],[3,141,113,4,142,114],[3,70,44,11,71,45],[17,47,21,4,48,22],[9,39,13,16,40,14],[3,135,107,5,136,108],[3,67,41,13,68,42],[15,54,24,5,55,25],[15,43,15,10,44,16],[4,144,116,4,145,117],[17,68,42],[17,50,22,6,51,23],[19,46,16,6,47,17],[2,139,111,7,140,112],[17,74,46],[7,54,24,16,55,25],[34,37,13],[4,151,121,5,152,122],[4,75,47,14,76,48],[11,54,24,14,55,25],[16,45,15,14,46,16],[6,147,117,4,148,118],[6,73,45,14,74,46],[11,54,24,16,55,25],[30,46,16,2,47,17],[8,132,106,4,133,107],[8,75,47,13,76,48],[7,54,24,22,55,25],[22,45,15,13,46,16],[10,142,114,2,143,115],[19,74,46,4,75,47],[28,50,22,6,51,23],[33,46,16,4,47,17],[8,152,122,4,153,123],[22,73,45,3,74,46],[8,53,23,26,54,24],[12,45,15,28,46,16],[3,147,117,10,148,118],[3,73,45,23,74,46],[4,54,24,31,55,25],[11,45,15,31,46,16],[7,146,116,7,147,117],[21,73,45,7,74,46],[1,53,23,37,54,24],[19,45,15,26,46,16],[5,145,115,10,146,116],[19,75,47,10,76,48],[15,54,24,25,55,25],[23,45,15,25,46,16],[13,145,115,3,146,116],[2,74,46,29,75,47],[42,54,24,1,55,25],[23,45,15,28,46,16],[17,145,115],[10,74,46,23,75,47],[10,54,24,35,55,25],[19,45,15,35,46,16],[17,145,115,1,146,116],[14,74,46,21,75,47],[29,54,24,19,55,25],[11,45,15,46,46,16],[13,145,115,6,146,116],[14,74,46,23,75,47],[44,54,24,7,55,25],[59,46,16,1,47,17],[12,151,121,7,152,122],[12,75,47,26,76,48],[39,54,24,14,55,25],[22,45,15,41,46,16],[6,151,121,14,152,122],[6,75,47,34,76,48],[46,54,24,10,55,25],[2,45,15,64,46,16],[17,152,122,4,153,123],[29,74,46,14,75,47],[49,54,24,10,55,25],[24,45,15,46,46,16],[4,152,122,18,153,123],[13,74,46,32,75,47],[48,54,24,14,55,25],[42,45,15,32,46,16],[20,147,117,4,148,118],[40,75,47,7,76,48],[43,54,24,22,55,25],[10,45,15,67,46,16],[19,148,118,6,149,119],[18,75,47,31,76,48],[34,54,24,34,55,25],[20,45,15,61,46,16]];QRRSBlock.getRSBlocks=function(typeNumber,errorCorrectLevel){var rsBlock=QRRSBlock.getRsBlockTable(typeNumber,errorCorrectLevel);if(rsBlock==undefined){throw new Error("bad rs block @ typeNumber:"+typeNumber+"/errorCorrectLevel:"+errorCorrectLevel);}
-	var length=rsBlock.length/3;var list=[];for(var i=0;i<length;i++){var count=rsBlock[i*3+0];var totalCount=rsBlock[i*3+1];var dataCount=rsBlock[i*3+2];for(var j=0;j<count;j++){list.push(new QRRSBlock(totalCount,dataCount));}}
-	return list;};QRRSBlock.getRsBlockTable=function(typeNumber,errorCorrectLevel){switch(errorCorrectLevel){case QRErrorCorrectLevel.L:return QRRSBlock.RS_BLOCK_TABLE[(typeNumber-1)*4+0];case QRErrorCorrectLevel.M:return QRRSBlock.RS_BLOCK_TABLE[(typeNumber-1)*4+1];case QRErrorCorrectLevel.Q:return QRRSBlock.RS_BLOCK_TABLE[(typeNumber-1)*4+2];case QRErrorCorrectLevel.H:return QRRSBlock.RS_BLOCK_TABLE[(typeNumber-1)*4+3];default:return undefined;}};function QRBitBuffer(){this.buffer=[];this.length=0;}
-	QRBitBuffer.prototype={get:function(index){var bufIndex=Math.floor(index/8);return((this.buffer[bufIndex]>>>(7-index%8))&1)==1;},put:function(num,length){for(var i=0;i<length;i++){this.putBit(((num>>>(length-i-1))&1)==1);}},getLengthInBits:function(){return this.length;},putBit:function(bit){var bufIndex=Math.floor(this.length/8);if(this.buffer.length<=bufIndex){this.buffer.push(0);}
-	if(bit){this.buffer[bufIndex]|=(0x80>>>(this.length%8));}
-	this.length++;}};var QRCodeLimitLength=[[17,14,11,7],[32,26,20,14],[53,42,32,24],[78,62,46,34],[106,84,60,44],[134,106,74,58],[154,122,86,64],[192,152,108,84],[230,180,130,98],[271,213,151,119],[321,251,177,137],[367,287,203,155],[425,331,241,177],[458,362,258,194],[520,412,292,220],[586,450,322,250],[644,504,364,280],[718,560,394,310],[792,624,442,338],[858,666,482,382],[929,711,509,403],[1003,779,565,439],[1091,857,611,461],[1171,911,661,511],[1273,997,715,535],[1367,1059,751,593],[1465,1125,805,625],[1528,1190,868,658],[1628,1264,908,698],[1732,1370,982,742],[1840,1452,1030,790],[1952,1538,1112,842],[2068,1628,1168,898],[2188,1722,1228,958],[2303,1809,1283,983],[2431,1911,1351,1051],[2563,1989,1423,1093],[2699,2099,1499,1139],[2809,2213,1579,1219],[2953,2331,1663,1273]];
-	
-	function _isSupportCanvas() {
-		return typeof CanvasRenderingContext2D != "undefined";
-	}
-	
-	// android 2.x doesn't support Data-URI spec
-	function _getAndroid() {
-		var android = false;
-		var sAgent = navigator.userAgent;
-		
-		if (/android/i.test(sAgent)) { // android
-			android = true;
-			aMat = sAgent.toString().match(/android ([0-9]\.[0-9])/i);
-			
-			if (aMat && aMat[1]) {
-				android = parseFloat(aMat[1]);
-			}
-		}
-		
-		return android;
-	}
-	
-	var svgDrawer = (function() {
-
-		var Drawing = function (el, htOption) {
-			this._el = el;
-			this._htOption = htOption;
-		};
-
-		Drawing.prototype.draw = function (oQRCode) {
-			var _htOption = this._htOption;
-			var _el = this._el;
-			var nCount = oQRCode.getModuleCount();
-			var nWidth = Math.floor(_htOption.width / nCount);
-			var nHeight = Math.floor(_htOption.height / nCount);
-
-			this.clear();
-
-			function makeSVG(tag, attrs) {
-				var el = document.createElementNS('http://www.w3.org/2000/svg', tag);
-				for (var k in attrs)
-					if (attrs.hasOwnProperty(k)) el.setAttribute(k, attrs[k]);
-				return el;
-			}
-
-			var svg = makeSVG("svg" , {'viewBox': '0 0 ' + String(nCount) + " " + String(nCount), 'width': '100%', 'height': '100%', 'fill': _htOption.colorLight});
-			svg.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns:xlink", "http://www.w3.org/1999/xlink");
-			_el.appendChild(svg);
-
-			svg.appendChild(makeSVG("rect", {"fill": _htOption.colorDark, "width": "1", "height": "1", "id": "template"}));
-
-			for (var row = 0; row < nCount; row++) {
-				for (var col = 0; col < nCount; col++) {
-					if (oQRCode.isDark(row, col)) {
-						var child = makeSVG("use", {"x": String(row), "y": String(col)});
-						child.setAttributeNS("http://www.w3.org/1999/xlink", "href", "#template")
-						svg.appendChild(child);
-					}
-				}
-			}
-		};
-		Drawing.prototype.clear = function () {
-			while (this._el.hasChildNodes())
-				this._el.removeChild(this._el.lastChild);
-		};
-		return Drawing;
-	})();
-
-	var useSVG = document.documentElement.tagName.toLowerCase() === "svg";
-
-	// Drawing in DOM by using Table tag
-	var Drawing = useSVG ? svgDrawer : !_isSupportCanvas() ? (function () {
-		var Drawing = function (el, htOption) {
-			this._el = el;
-			this._htOption = htOption;
-		};
-			
-		/**
-		 * Draw the QRCode
-		 * 
-		 * @param {QRCode} oQRCode
-		 */
-		Drawing.prototype.draw = function (oQRCode) {
-            var _htOption = this._htOption;
-            var _el = this._el;
-			var nCount = oQRCode.getModuleCount();
-			var nWidth = Math.floor(_htOption.width / nCount);
-			var nHeight = Math.floor(_htOption.height / nCount);
-			var aHTML = ['<table style="border:0;border-collapse:collapse;">'];
-			
-			for (var row = 0; row < nCount; row++) {
-				aHTML.push('<tr>');
-				
-				for (var col = 0; col < nCount; col++) {
-					aHTML.push('<td style="border:0;border-collapse:collapse;padding:0;margin:0;width:' + nWidth + 'px;height:' + nHeight + 'px;background-color:' + (oQRCode.isDark(row, col) ? _htOption.colorDark : _htOption.colorLight) + ';"></td>');
-				}
-				
-				aHTML.push('</tr>');
-			}
-			
-			aHTML.push('</table>');
-			_el.innerHTML = aHTML.join('');
-			
-			// Fix the margin values as real size.
-			var elTable = _el.childNodes[0];
-			var nLeftMarginTable = (_htOption.width - elTable.offsetWidth) / 2;
-			var nTopMarginTable = (_htOption.height - elTable.offsetHeight) / 2;
-			
-			if (nLeftMarginTable > 0 && nTopMarginTable > 0) {
-				elTable.style.margin = nTopMarginTable + "px " + nLeftMarginTable + "px";	
-			}
-		};
-		
-		/**
-		 * Clear the QRCode
-		 */
-		Drawing.prototype.clear = function () {
-			this._el.innerHTML = '';
-		};
-		
-		return Drawing;
-	})() : (function () { // Drawing in Canvas
-		function _onMakeImage() {
-			this._elImage.src = this._elCanvas.toDataURL("image/png");
-			this._elImage.style.display = "block";
-			this._elCanvas.style.display = "none";			
-		}
-		
-		// Android 2.1 bug workaround
-		// http://code.google.com/p/android/issues/detail?id=5141
-		if (this._android && this._android <= 2.1) {
-	    	var factor = 1 / window.devicePixelRatio;
-	        var drawImage = CanvasRenderingContext2D.prototype.drawImage; 
-	    	CanvasRenderingContext2D.prototype.drawImage = function (image, sx, sy, sw, sh, dx, dy, dw, dh) {
-	    		if (("nodeName" in image) && /img/i.test(image.nodeName)) {
-		        	for (var i = arguments.length - 1; i >= 1; i--) {
-		            	arguments[i] = arguments[i] * factor;
-		        	}
-	    		} else if (typeof dw == "undefined") {
-	    			arguments[1] *= factor;
-	    			arguments[2] *= factor;
-	    			arguments[3] *= factor;
-	    			arguments[4] *= factor;
-	    		}
-	    		
-	        	drawImage.apply(this, arguments); 
-	    	};
-		}
-		
-		/**
-		 * Check whether the user's browser supports Data URI or not
-		 * 
-		 * @private
-		 * @param {Function} fSuccess Occurs if it supports Data URI
-		 * @param {Function} fFail Occurs if it doesn't support Data URI
-		 */
-		function _safeSetDataURI(fSuccess, fFail) {
-            var self = this;
-            self._fFail = fFail;
-            self._fSuccess = fSuccess;
-
-            // Check it just once
-            if (self._bSupportDataURI === null) {
-                var el = document.createElement("img");
-                var fOnError = function() {
-                    self._bSupportDataURI = false;
-
-                    if (self._fFail) {
-                        _fFail.call(self);
-                    }
-                };
-                var fOnSuccess = function() {
-                    self._bSupportDataURI = true;
-
-                    if (self._fSuccess) {
-                        self._fSuccess.call(self);
-                    }
-                };
-
-                el.onabort = fOnError;
-                el.onerror = fOnError;
-                el.onload = fOnSuccess;
-                el.src = "data:image/gif;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO9TXL0Y4OHwAAAABJRU5ErkJggg=="; // the Image contains 1px data.
-                return;
-            } else if (self._bSupportDataURI === true && self._fSuccess) {
-                self._fSuccess.call(self);
-            } else if (self._bSupportDataURI === false && self._fFail) {
-                self._fFail.call(self);
-            }
-		};
-		
-		/**
-		 * Drawing QRCode by using canvas
-		 * 
-		 * @constructor
-		 * @param {HTMLElement} el
-		 * @param {Object} htOption QRCode Options 
-		 */
-		var Drawing = function (el, htOption) {
-    		this._bIsPainted = false;
-    		this._android = _getAndroid();
-		
-			this._htOption = htOption;
-			this._elCanvas = document.createElement("canvas");
-			this._elCanvas.width = htOption.width;
-			this._elCanvas.height = htOption.height;
-			el.appendChild(this._elCanvas);
-			this._el = el;
-			this._oContext = this._elCanvas.getContext("2d");
-			this._bIsPainted = false;
-			this._elImage = document.createElement("img");
-			this._elImage.alt = "Scan me!";
-			this._elImage.style.display = "none";
-			this._el.appendChild(this._elImage);
-			this._bSupportDataURI = null;
-		};
-			
-		/**
-		 * Draw the QRCode
-		 * 
-		 * @param {QRCode} oQRCode 
-		 */
-		Drawing.prototype.draw = function (oQRCode) {
-            var _elImage = this._elImage;
-            var _oContext = this._oContext;
-            var _htOption = this._htOption;
-            
-			var nCount = oQRCode.getModuleCount();
-			var nWidth = _htOption.width / nCount;
-			var nHeight = _htOption.height / nCount;
-			var nRoundedWidth = Math.round(nWidth);
-			var nRoundedHeight = Math.round(nHeight);
-
-			_elImage.style.display = "none";
-			this.clear();
-			
-			for (var row = 0; row < nCount; row++) {
-				for (var col = 0; col < nCount; col++) {
-					var bIsDark = oQRCode.isDark(row, col);
-					var nLeft = col * nWidth;
-					var nTop = row * nHeight;
-					_oContext.strokeStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight;
-					_oContext.lineWidth = 1;
-					_oContext.fillStyle = bIsDark ? _htOption.colorDark : _htOption.colorLight;					
-					_oContext.fillRect(nLeft, nTop, nWidth, nHeight);
-					
-					// 안티 앨리어싱 방지 처리
-					_oContext.strokeRect(
-						Math.floor(nLeft) + 0.5,
-						Math.floor(nTop) + 0.5,
-						nRoundedWidth,
-						nRoundedHeight
-					);
-					
-					_oContext.strokeRect(
-						Math.ceil(nLeft) - 0.5,
-						Math.ceil(nTop) - 0.5,
-						nRoundedWidth,
-						nRoundedHeight
-					);
-				}
-			}
-			
-			this._bIsPainted = true;
-		};
-			
-		/**
-		 * Make the image from Canvas if the browser supports Data URI.
-		 */
-		Drawing.prototype.makeImage = function () {
-			if (this._bIsPainted) {
-				_safeSetDataURI.call(this, _onMakeImage);
-			}
-		};
-			
-		/**
-		 * Return whether the QRCode is painted or not
-		 * 
-		 * @return {Boolean}
-		 */
-		Drawing.prototype.isPainted = function () {
-			return this._bIsPainted;
-		};
-		
-		/**
-		 * Clear the QRCode
-		 */
-		Drawing.prototype.clear = function () {
-			this._oContext.clearRect(0, 0, this._elCanvas.width, this._elCanvas.height);
-			this._bIsPainted = false;
-		};
-		
-		/**
-		 * @private
-		 * @param {Number} nNumber
-		 */
-		Drawing.prototype.round = function (nNumber) {
-			if (!nNumber) {
-				return nNumber;
-			}
-			
-			return Math.floor(nNumber * 1000) / 1000;
-		};
-		
-		return Drawing;
-	})();
-	
-	/**
-	 * Get the type by string length
-	 * 
-	 * @private
-	 * @param {String} sText
-	 * @param {Number} nCorrectLevel
-	 * @return {Number} type
-	 */
-	function _getTypeNumber(sText, nCorrectLevel) {			
-		var nType = 1;
-		var length = _getUTF8Length(sText);
-		
-		for (var i = 0, len = QRCodeLimitLength.length; i <= len; i++) {
-			var nLimit = 0;
-			
-			switch (nCorrectLevel) {
-				case QRErrorCorrectLevel.L :
-					nLimit = QRCodeLimitLength[i][0];
-					break;
-				case QRErrorCorrectLevel.M :
-					nLimit = QRCodeLimitLength[i][1];
-					break;
-				case QRErrorCorrectLevel.Q :
-					nLimit = QRCodeLimitLength[i][2];
-					break;
-				case QRErrorCorrectLevel.H :
-					nLimit = QRCodeLimitLength[i][3];
-					break;
-			}
-			
-			if (length <= nLimit) {
-				break;
-			} else {
-				nType++;
-			}
-		}
-		
-		if (nType > QRCodeLimitLength.length) {
-			throw new Error("Too long data");
-		}
-		
-		return nType;
-	}
-
-	function _getUTF8Length(sText) {
-		var replacedText = encodeURI(sText).toString().replace(/\%[0-9a-fA-F]{2}/g, 'a');
-		return replacedText.length + (replacedText.length != sText ? 3 : 0);
-	}
-	
-	/**
-	 * @class QRCode
-	 * @constructor
-	 * @example 
-	 * new QRCode(document.getElementById("test"), "http://jindo.dev.naver.com/collie");
-	 *
-	 * @example
-	 * var oQRCode = new QRCode("test", {
-	 *    text : "http://naver.com",
-	 *    width : 128,
-	 *    height : 128
-	 * });
-	 * 
-	 * oQRCode.clear(); // Clear the QRCode.
-	 * oQRCode.makeCode("http://map.naver.com"); // Re-create the QRCode.
-	 *
-	 * @param {HTMLElement|String} el target element or 'id' attribute of element.
-	 * @param {Object|String} vOption
-	 * @param {String} vOption.text QRCode link data
-	 * @param {Number} [vOption.width=256]
-	 * @param {Number} [vOption.height=256]
-	 * @param {String} [vOption.colorDark="#000000"]
-	 * @param {String} [vOption.colorLight="#ffffff"]
-	 * @param {QRCode.CorrectLevel} [vOption.correctLevel=QRCode.CorrectLevel.H] [L|M|Q|H] 
-	 */
-	QRCode = function (el, vOption) {
-		this._htOption = {
-			width : 256, 
-			height : 256,
-			typeNumber : 4,
-			colorDark : "#000000",
-			colorLight : "#ffffff",
-			correctLevel : QRErrorCorrectLevel.H
-		};
-		
-		if (typeof vOption === 'string') {
-			vOption	= {
-				text : vOption
-			};
-		}
-		
-		// Overwrites options
-		if (vOption) {
-			for (var i in vOption) {
-				this._htOption[i] = vOption[i];
-			}
-		}
-		
-		if (typeof el == "string") {
-			el = document.getElementById(el);
-		}
-		
-		this._android = _getAndroid();
-		this._el = el;
-		this._oQRCode = null;
-		this._oDrawing = new Drawing(this._el, this._htOption);
-		
-		if (this._htOption.text) {
-			this.makeCode(this._htOption.text);	
-		}
-	};
-	
-	/**
-	 * Make the QRCode
-	 * 
-	 * @param {String} sText link data
-	 */
-	QRCode.prototype.makeCode = function (sText) {
-		this._oQRCode = new QRCodeModel(_getTypeNumber(sText, this._htOption.correctLevel), this._htOption.correctLevel);
-		this._oQRCode.addData(sText);
-		this._oQRCode.make();
-		this._el.title = sText;
-		this._oDrawing.draw(this._oQRCode);			
-		this.makeImage();
-	};
-	
-	/**
-	 * Make the Image from Canvas element
-	 * - It occurs automatically
-	 * - Android below 3 doesn't support Data-URI spec.
-	 * 
-	 * @private
-	 */
-	QRCode.prototype.makeImage = function () {
-		if (typeof this._oDrawing.makeImage == "function" && (!this._android || this._android >= 3)) {
-			this._oDrawing.makeImage();
-		}
-	};
-	
-	/**
-	 * Clear the QRCode
-	 */
-	QRCode.prototype.clear = function () {
-		this._oDrawing.clear();
-	};
-	
-	/**
-	 * @name QRCode.CorrectLevel
-	 */
-	QRCode.CorrectLevel = QRErrorCorrectLevel;
-})();
diff --git a/package.json b/package.json
index aee88819ed7a..6c11246e888b 100644
--- a/package.json
+++ b/package.json
@@ -140,6 +140,7 @@
     "pino-multi-stream": "5.3.0",
     "protobufjs": "6.10.2",
     "proxy-agent": "5.0.0",
+    "qrcode-generator": "1.4.4",
     "quill": "1.3.7",
     "quill-delta": "4.0.1",
     "react": "16.8.3",
diff --git a/stylesheets/components/InstallScreenQrCodeNotScannedStep.scss b/stylesheets/components/InstallScreenQrCodeNotScannedStep.scss
index 2ef91b759f32..52d572012e0d 100644
--- a/stylesheets/components/InstallScreenQrCodeNotScannedStep.scss
+++ b/stylesheets/components/InstallScreenQrCodeNotScannedStep.scss
@@ -1,4 +1,4 @@
-// Copyright 2021 Signal Messenger, LLC
+// Copyright 2021-2022 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
 .module-InstallScreenQrCodeNotScannedStep {
@@ -58,8 +58,6 @@
     }
 
     &__code {
-      display: flex;
-      flex-direction: column;
       height: $size;
       width: $size;
       animation: 1s module-InstallScreenQrCodeNotScannedStep__slide-in;
diff --git a/ts/components/QrCode.stories.tsx b/ts/components/QrCode.stories.tsx
new file mode 100644
index 000000000000..118c02bb91ad
--- /dev/null
+++ b/ts/components/QrCode.stories.tsx
@@ -0,0 +1,17 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import { storiesOf } from '@storybook/react';
+
+import { QrCode } from './QrCode';
+
+const story = storiesOf('Components/QrCode', module);
+
+story.add('Default', () => (
+  <QrCode
+    aria-label="Scan this little code!"
+    data="sgnl://linkdevice?uuid=gCkj0T2xiSUaPRhMYiF24w&pub_key=7RshtQrb3UTMowITe79uW9dgw_CLTGWenj0OT80i0HpH"
+    size={256}
+  />
+));
diff --git a/ts/components/QrCode.tsx b/ts/components/QrCode.tsx
new file mode 100644
index 000000000000..06959210df6f
--- /dev/null
+++ b/ts/components/QrCode.tsx
@@ -0,0 +1,61 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import type { ReactElement } from 'react';
+import React, { useEffect, useMemo, useRef } from 'react';
+import qrcode from 'qrcode-generator';
+import { strictAssert } from '../util/assert';
+import { useDevicePixelRatio } from '../hooks/useDevicePixelRatio';
+
+const AUTODETECT_TYPE_NUMBER = 0;
+const ERROR_CORRECTION_LEVEL = 'H';
+
+type PropsType = Readonly<{
+  'aria-label': string;
+  className?: string;
+  data: string;
+  size: number;
+}>;
+
+export function QrCode(props: PropsType): ReactElement {
+  // I don't think it's possible to destructure this.
+  // eslint-disable-next-line react/destructuring-assignment
+  const ariaLabel = props['aria-label'];
+  const { className, data, size } = props;
+
+  const qrCode = useMemo(() => {
+    const result = qrcode(AUTODETECT_TYPE_NUMBER, ERROR_CORRECTION_LEVEL);
+    result.addData(data);
+    result.make();
+    return result;
+  }, [data]);
+
+  const canvasRef = useRef<null | HTMLCanvasElement>(null);
+  const dpi = useDevicePixelRatio();
+  const canvasSize = size * dpi;
+
+  useEffect(() => {
+    const canvas = canvasRef.current;
+    if (!canvas) {
+      return;
+    }
+
+    const context = canvas.getContext('2d');
+    strictAssert(context, 'Expected a canvas context');
+
+    const cellSize = canvasSize / qrCode.getModuleCount();
+    context.clearRect(0, 0, canvasSize, canvasSize);
+    qrCode.renderTo2dContext(context, cellSize);
+  }, [canvasSize, qrCode]);
+
+  return (
+    <canvas
+      aria-label={ariaLabel}
+      className={className}
+      height={canvasSize}
+      ref={canvasRef}
+      style={{ width: size, height: size }}
+      width={canvasSize}
+    />
+  );
+}
diff --git a/ts/components/installScreen/InstallScreenQrCodeNotScannedStep.tsx b/ts/components/installScreen/InstallScreenQrCodeNotScannedStep.tsx
index 49a67a6169c4..c007476a268c 100644
--- a/ts/components/installScreen/InstallScreenQrCodeNotScannedStep.tsx
+++ b/ts/components/installScreen/InstallScreenQrCodeNotScannedStep.tsx
@@ -1,10 +1,9 @@
-// Copyright 2021 Signal Messenger, LLC
+// Copyright 2021-2022 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import type { ReactElement, ReactNode } from 'react';
-import React, { useEffect, useRef } from 'react';
+import React from 'react';
 import classNames from 'classnames';
-import { noop } from 'lodash';
 
 import type { LocalizerType } from '../../types/Util';
 import { missingCaseError } from '../../util/missingCaseError';
@@ -13,6 +12,7 @@ import { LoadingState } from '../../util/loadable';
 
 import { Intl } from '../Intl';
 import { Spinner } from '../Spinner';
+import { QrCode } from '../QrCode';
 import { TitlebarDragArea } from '../TitlebarDragArea';
 import { InstallScreenSignalLogo } from './InstallScreenSignalLogo';
 import { getClassNamesFor } from '../../util/getClassNamesFor';
@@ -44,7 +44,7 @@ export const InstallScreenQrCodeNotScannedStep = ({
     <InstallScreenSignalLogo />
 
     <div className="module-InstallScreenQrCodeNotScannedStep__contents">
-      <QrCode i18n={i18n} {...provisioningUrl} />
+      <InstallScreenQrCode i18n={i18n} {...provisioningUrl} />
       <div className="module-InstallScreenQrCodeNotScannedStep__instructions">
         <h1>{i18n('Install__scan-this-code')}</h1>
         <ol>
@@ -82,31 +82,11 @@ export const InstallScreenQrCodeNotScannedStep = ({
   </div>
 );
 
-function QrCode(
+function InstallScreenQrCode(
   props: Loadable<string> & { i18n: LocalizerType }
 ): ReactElement {
   const { i18n } = props;
 
-  const qrCodeElRef = useRef<null | HTMLDivElement>(null);
-
-  const valueToRender =
-    props.loadingState === LoadingState.Loaded ? props.value : undefined;
-
-  useEffect(() => {
-    const qrCodeEl = qrCodeElRef.current;
-    if (!qrCodeEl || !valueToRender) {
-      return noop;
-    }
-
-    const qrCode = new window.QRCode(qrCodeEl, {
-      text: valueToRender,
-      width: QR_CODE_SIZE * window.devicePixelRatio,
-      height: QR_CODE_SIZE * window.devicePixelRatio,
-    });
-
-    return qrCode.clear.bind(qrCode);
-  }, [valueToRender]);
-
   let contents: ReactNode;
   switch (props.loadingState) {
     case LoadingState.Loading:
@@ -129,7 +109,12 @@ function QrCode(
       break;
     case LoadingState.Loaded:
       contents = (
-        <div className={getQrCodeClassName('__code')} ref={qrCodeElRef} />
+        <QrCode
+          aria-label={i18n('Install__scan-this-code')}
+          className={getQrCodeClassName('__code')}
+          data={props.value}
+          size={QR_CODE_SIZE}
+        />
       );
       break;
     default:
diff --git a/ts/hooks/useDevicePixelRatio.ts b/ts/hooks/useDevicePixelRatio.ts
new file mode 100644
index 000000000000..09b89fd276da
--- /dev/null
+++ b/ts/hooks/useDevicePixelRatio.ts
@@ -0,0 +1,27 @@
+// Copyright 2022 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import { useEffect, useState } from 'react';
+
+export function useDevicePixelRatio(): number {
+  const [result, setResult] = useState(window.devicePixelRatio);
+
+  useEffect(() => {
+    const update = () => {
+      setResult(window.devicePixelRatio);
+    };
+
+    update();
+
+    const mediaQuery = window.matchMedia(
+      `screen and (resolution: ${result}dppx)`
+    );
+    mediaQuery.addEventListener('change', update);
+
+    return () => {
+      mediaQuery.removeEventListener('change', update);
+    };
+  }, [result]);
+
+  return result;
+}
diff --git a/ts/scripts/copy-and-concat.ts b/ts/scripts/copy-and-concat.ts
index d0ce0c2a59df..25f466bbf4f3 100644
--- a/ts/scripts/copy-and-concat.ts
+++ b/ts/scripts/copy-and-concat.ts
@@ -1,4 +1,4 @@
-// Copyright 2021 Signal Messenger, LLC
+// Copyright 2021-2022 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
 import { basename, join } from 'path';
@@ -15,7 +15,6 @@ const CONCAT_SOURCES = [
   join(BASE_NODE, 'jquery/dist/jquery.js'),
   join(BASE_NODE, 'mustache/mustache.js'),
   join(BASE_NODE, 'underscore/underscore.js'),
-  join(BASE_BOWER, 'qrcode/qrcode.js'),
   join(BASE_BOWER, 'webaudiorecorder/lib/WebAudioRecorder.js'),
 ];
 
diff --git a/ts/util/lint/exceptions.json b/ts/util/lint/exceptions.json
index 1159be439cab..77833ed12b18 100644
--- a/ts/util/lint/exceptions.json
+++ b/ts/util/lint/exceptions.json
@@ -76,22 +76,6 @@
     "updated": "2018-09-15T00:16:19.197Z",
     "line": "  Module['load'] = function load(f) {"
   },
-  {
-    "rule": "DOM-innerHTML",
-    "path": "components/qrcode/qrcode.js",
-    "line": "\t\t\tthis._el.innerHTML = '';",
-    "reasonCategory": "usageTrusted",
-    "updated": "2018-09-15T00:38:04.183Z",
-    "reasonDetail": "Hard-coded string"
-  },
-  {
-    "rule": "DOM-innerHTML",
-    "path": "components/qrcode/qrcode.js",
-    "line": "\t\t\t_el.innerHTML = aHTML.join('');",
-    "reasonCategory": "usageTrusted",
-    "updated": "2018-09-18T19:19:27.699Z",
-    "reasonDetail": "Very limited in what HTML can be injected - dark/light options specify colors for the light/dark parts of QRCode"
-  },
   {
     "rule": "jQuery-append(",
     "path": "node_modules/@discoveryjs/json-ext/dist/json-ext.js",
@@ -5135,6 +5119,22 @@
     "reasonCategory": "falseMatch",
     "updated": "2018-09-15T00:38:04.183Z"
   },
+  {
+    "rule": "DOM-document.write(",
+    "path": "node_modules/qrcode-generator/sample.js",
+    "line": "  document.write(create_qrcode(text, typeNumber, errorCorrectionLevel) );",
+    "reasonCategory": "notExercisedByOurApp",
+    "updated": "2022-01-04T20:32:10.596Z",
+    "reasonDetail": "Sample code never required by us."
+  },
+  {
+    "rule": "DOM-innerHTML",
+    "path": "node_modules/qrcode-generator/sample.js",
+    "line": "  document.getElementById('qr').innerHTML =",
+    "reasonCategory": "notExercisedByOurApp",
+    "updated": "2022-01-04T20:32:10.596Z",
+    "reasonDetail": "Sample code never required by us."
+  },
   {
     "rule": "jQuery-insertBefore(",
     "path": "node_modules/quill/blots/block.js",
@@ -7482,6 +7482,14 @@
     "reasonCategory": "usageTrusted",
     "updated": "2021-07-30T16:57:33.618Z"
   },
+  {
+    "rule": "React-useRef",
+    "path": "ts/components/QrCode.tsx",
+    "line": "  const canvasRef = useRef<null | HTMLCanvasElement>(null);",
+    "reasonCategory": "usageTrusted",
+    "updated": "2022-01-04T21:43:17.517Z",
+    "reasonDetail": "Used to draw on the canvas."
+  },
   {
     "rule": "React-createRef",
     "path": "ts/components/SafetyNumberChangeDialog.js",
@@ -7757,14 +7765,6 @@
     "updated": "2021-12-06T23:07:28.947Z",
     "reasonDetail": "Doesn't touch the DOM."
   },
-  {
-    "rule": "React-useRef",
-    "path": "ts/components/installScreen/InstallScreenQrCodeNotScannedStep.tsx",
-    "line": "  const qrCodeElRef = useRef<null | HTMLDivElement>(null);",
-    "reasonCategory": "usageTrusted",
-    "updated": "2021-12-06T23:07:28.947Z",
-    "reasonDetail": "Uses our QR code library."
-  },
   {
     "rule": "React-createRef",
     "path": "ts/components/stickers/StickerManager.js",
diff --git a/ts/util/lint/license_comments.ts b/ts/util/lint/license_comments.ts
index 3e89614ba381..2ea20c4d88e7 100644
--- a/ts/util/lint/license_comments.ts
+++ b/ts/util/lint/license_comments.ts
@@ -1,4 +1,4 @@
-// Copyright 2020 Signal Messenger, LLC
+// Copyright 2020-2022 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
 // This file doesn't check the format of license files, just the end year. See
@@ -39,7 +39,6 @@ const FILES_TO_IGNORE = new Set(
     '.github/ISSUE_TEMPLATE/bug_report.md',
     '.github/PULL_REQUEST_TEMPLATE.md',
     'components/mp3lameencoder/lib/Mp3LameEncoder.js',
-    'components/qrcode/qrcode.js',
     'components/recorderjs/recorder.js',
     'components/recorderjs/recorderWorker.js',
     'components/webaudiorecorder/lib/WebAudioRecorder.js',
diff --git a/ts/window.d.ts b/ts/window.d.ts
index 636214f1aa4b..7153d5a3b23d 100644
--- a/ts/window.d.ts
+++ b/ts/window.d.ts
@@ -1,4 +1,4 @@
-// Copyright 2020-2021 Signal Messenger, LLC
+// Copyright 2020-2022 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
 // Captures the globals put in place by preload.js, background.js and others
@@ -131,32 +131,6 @@ type ConfirmationDialogViewProps = {
   resolve: () => void;
 };
 
-declare enum QRCodeCorrectLevel {
-  H = 2,
-  L = 1,
-  M = 0,
-  Q = 3,
-}
-
-declare class QRCode {
-  static CorrectLevel: typeof QRCodeCorrectLevel;
-  constructor(
-    el: HTMLElement | string,
-    vOption?:
-      | string
-      | {
-          colorDark?: string;
-          colorLight?: string;
-          correctLevel?: QRCodeCorrectLevel;
-          height?: number;
-          text?: string;
-          width?: number;
-        }
-  );
-  makeCode(sText: string): void;
-  clear(): void;
-}
-
 export declare class WebAudioRecorderClass {
   constructor(
     node: GainNode,
@@ -292,7 +266,6 @@ declare global {
     updateTrayIcon: (count: number) => void;
     Backbone: typeof Backbone;
     CI?: CI;
-    QRCode: typeof QRCode;
 
     Accessibility: {
       reducedMotionSetting: boolean;
diff --git a/yarn.lock b/yarn.lock
index cbd3d0aff250..3229f9b09b25 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11919,6 +11919,11 @@ q@^1.1.2:
   version "1.5.0"
   resolved "https://registry.yarnpkg.com/q/-/q-1.5.0.tgz#dd01bac9d06d30e6f219aecb8253ee9ebdc308f1"
 
+qrcode-generator@1.4.4:
+  version "1.4.4"
+  resolved "https://registry.yarnpkg.com/qrcode-generator/-/qrcode-generator-1.4.4.tgz#63f771224854759329a99048806a53ed278740e7"
+  integrity sha512-HM7yY8O2ilqhmULxGMpcHSF1EhJJ9yBj8gvDEuZ6M+KGJ0YY2hKpnXvRD+hZPLrDVck3ExIGhmPtSdcjC+guuw==
+
 qs@6.7.0:
   version "6.7.0"
   resolved "https://registry.yarnpkg.com/qs/-/qs-6.7.0.tgz#41dc1a015e3d581f1621776be31afb2876a9b1bc"