diff --git a/src/util.js b/src/util.js
--- a/src/util.js
+++ b/src/util.js
@@ -1,17 +1,17 @@
-export const MASK=0xffffffff;
+export const MASK = 0xffffffff;
 
-export function zeroPad(arr,length){
-	return arr.concat((new Array(length)).fill(0)).slice(0,length);
+export function zeroPad(arr, length) {
+	return arr.concat((new Array(length)).fill(0)).slice(0, length);
 }
 
-export function bytes2int32(arr){
-	return arr.reduce((acc,b,i)=>acc|b<<(i*8));
+export function bytes2int32(arr) {
+	return arr.reduce((acc, b, i) => acc | b << (i*8));
 }
 
-export function bytes2int32s(arr){
-	let res=[];
-	for(let i=0;i<arr.length;i+=4){
-		res.push(bytes2int32(arr.slice(i,i+4)));
+export function bytes2int32s(arr) {
+	let res = [];
+	for (let i = 0; i < arr.length; i += 4) {
+		res.push(bytes2int32(arr.slice(i, i+4)));
 	}
 	return res;
 }
@@ -19,11 +19,11 @@ export function bytes2int32s(arr){
 /**
  * Converts a 32 bit integer into 4 bytes in little endian order.
  */
-export function int322bytes(x){
-	let res=[];
-	for(let i=0;i<4;i++){
-		res.push(x&0xff);
-		x>>>=8;
+export function int322bytes(x) {
+	let res = [];
+	for (let i = 0; i < 4; i++) {
+		res.push(x & 0xff);
+		x >>>= 8;
 	}
 	return res;
 }
@@ -31,116 +31,116 @@ export function int322bytes(x){
 /**
  * Converts a 32 bit integer into 4 bytes in big endian order.
  */
-export function int322bytesBE(x){
-	let res=int322bytes(x);
+export function int322bytesBE(x) {
+	let res = int322bytes(x);
 	res.reverse();
 	return res;
 }
 
-export function int32s2bytes(arr){
-	return arr.map(int322bytes).reduce((acc,bytes)=>acc.concat(bytes));
+export function int32s2bytes(arr) {
+	return arr.map(int322bytes).reduce((acc, bytes) => acc.concat(bytes));
 }
 
-export function bytes2hex(arr){
-	return arr.map(x=>x.toString(16).padStart(2,"0")).join("");
+export function bytes2hex(arr) {
+	return arr.map(x => x.toString(16).padStart(2, "0")).join("");
 }
 
-export function str2utf8(s){
-	let res=[];
-	let c=s.codePointAt(0);
-	for(let i=0; c!==undefined; i++,c=s.codePointAt(i)){
-		if(c<0x80){res.push(c);}
-		else if(c<0x800){
-			res.push(0b11000000|(c>>>6));
-			res.push(0b10000000|(c&0b111111));
+export function str2utf8(s) {
+	let res = [];
+	let c = s.codePointAt(0);
+	for (let i=0; c!==undefined; i++, c=s.codePointAt(i)) {
+		if (c < 0x80) {res.push(c);}
+		else if (c < 0x800) {
+			res.push(0b11000000 | (c >>> 6));
+			res.push(0b10000000 | (c & 0b111111));
 		}
-		else if(c<0x10000){
-			res.push(0b11100000|(c>>>12));
-			res.push(0b10000000|((c>>>6)&0b111111));
-			res.push(0b10000000|(c&0b111111));
+		else if (c < 0x10000) {
+			res.push(0b11100000 | (c >>> 12));
+			res.push(0b10000000 | ((c >>> 6) & 0b111111));
+			res.push(0b10000000 | (c & 0b111111));
 		}
-		else{
-			res.push(0b11110000|(c>>>18));
-			res.push(0b10000000|((c>>>12)&0b111111));
-			res.push(0b10000000|((c>>>6)&0b111111));
-			res.push(0b10000000|(c&0b111111));
+		else {
+			res.push(0b11110000 | (c >>> 18));
+			res.push(0b10000000 | ((c >>> 12) & 0b111111));
+			res.push(0b10000000 | ((c >>> 6) & 0b111111));
+			res.push(0b10000000 | (c & 0b111111));
 		}
-		if(c>0xffff){i++;} // skip surrogate
+		if (c > 0xffff) {i++;} // skip surrogate
 	}
 	return res;
 }
 
-export function utf82str(arr){
-	let res=[];
-	for(let i=0;i<arr.length;i++){
-		let x=arr[i];
-		if(x<=0b1111111){res.push(x);}
-		else if(x<=0b11011111){
-			let a=x&0b11111;
-			let b=arr[++i]&0b111111;
-			res.push(a<<6|b);
+export function utf82str(arr) {
+	let res = [];
+	for (let i = 0; i < arr.length; i++) {
+		let x = arr[i];
+		if (x <= 0b1111111) {res.push(x);}
+		else if (x <= 0b11011111) {
+			let a = x & 0b11111;
+			let b = arr[++i] & 0b111111;
+			res.push(a << 6 | b);
 		}
-		else if(x<=0b11101111){
-			let a=x&0b1111;
-			let b=arr[++i]&0b111111;
-			let c=arr[++i]&0b111111;
-			res.push(a<<12|b<<6|c);
+		else if (x <= 0b11101111) {
+			let a = x & 0b1111;
+			let b = arr[++i] & 0b111111;
+			let c = arr[++i] & 0b111111;
+			res.push(a << 12 | b << 6 | c);
 		}
-		else{
-			let a=x&0b111;
-			let b=arr[++i]&0b111111;
-			let c=arr[++i]&0b111111;
-			let d=arr[++i]&0b111111;
-			res.push(a<<18|b<<12|c<<6|d);
+		else {
+			let a = x & 0b111;
+			let b = arr[++i] & 0b111111;
+			let c = arr[++i] & 0b111111;
+			let d = arr[++i] & 0b111111;
+			res.push(a << 18 | b << 12 | c << 6 | d);
 		}
 	}
-	return res.map(x=>String.fromCodePoint(x)).join("");
+	return res.map(x => String.fromCodePoint(x)).join("");
 }
 
-const mapping="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("");
-const remapping=new Array(128);
-mapping.forEach((c,i)=>{remapping[c.charCodeAt(0)]=i;});
+const mapping = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".split("");
+const remapping = new Array(128);
+mapping.forEach((c, i) => {remapping[c.charCodeAt(0)] = i;});
+
+export function bytes2base64(byteArr) {
+	let arr = byteArr.concat();
+	let out = [];
+	let rem = (3 - arr.length%3) % 3;
+	for (let i = 0; i < rem; i++) {arr.push(0);} // pad array to a multiple of 3
 
-export function bytes2base64(byteArr){
-	let arr=byteArr.concat();
-	let out=[];
-	let rem=(3-arr.length%3)%3;
-	for(let i=0;i<rem;i++){arr.push(0);} // pad array to a multiple of 3
-	
-	for(let i=0;i<arr.length;i+=3){ // encode 3 bytes into 4 characters
-		out.push(mapping[arr[i]>>>2&63]);
-		out.push(mapping[((arr[i]&3)<<4)+(arr[i+1]>>>4&15)]);
-		out.push(mapping[((arr[i+1]&15)<<2)+(arr[i+2]>>>6&3)]);
-		out.push(mapping[arr[i+2]&63]);
+	for (let i = 0; i < arr.length; i += 3) { // encode 3 bytes into 4 characters
+		out.push(mapping[arr[i]>>>2 & 63]);
+		out.push(mapping[((arr[i]&3) << 4) + (arr[i+1]>>>4 & 15)]);
+		out.push(mapping[((arr[i+1]&15) << 2) + (arr[i+2]>>>6 & 3)]);
+		out.push(mapping[arr[i+2] & 63]);
 	}
-	
-	for(let i=0;i<rem;i++){out.pop();}
-	for(let i=0;i<rem;i++){out.push("=");}
+
+	for (let i = 0; i < rem; i++) {out.pop();}
+	for (let i = 0; i < rem; i++) {out.push("=");}
 
 	return out.join("");
 }
 
-export function base642bytes(str){
-	let out=[];
-	
-	for(let i=0;i<str.length;i+=4){
-		let b1=remapping[str.charCodeAt(i)];
-		let b2=remapping[str.charCodeAt(i+1)];
-		let b3=remapping[str.charCodeAt(i+2)];
-		let b4=remapping[str.charCodeAt(i+3)];
-		
-		out.push((b1<<2)+(b2>>4&3));
-		out.push(((b2&15)<<4)+(b3>>2&15));
-		out.push(((b3&3)<<6)+b4);
+export function base642bytes(str) {
+	let out = [];
+
+	for (let i = 0; i < str.length; i += 4) {
+		let b1 = remapping[str.charCodeAt(i)];
+		let b2 = remapping[str.charCodeAt(i+1)];
+		let b3 = remapping[str.charCodeAt(i+2)];
+		let b4 = remapping[str.charCodeAt(i+3)];
+
+		out.push((b1<<2) + (b2>>4 & 3));
+		out.push(((b2&15) << 4) + (b3>>2 & 15));
+		out.push(((b3&3) << 6) + b4);
 	}
-	
-	for(let i=1; i<3&&str[str.length-i]=="="; i++){out.pop();}
+
+	for (let i=1; i<3 && str[str.length-i]=="="; i++) {out.pop();}
 
 	return out;
 }
 
-export function createRandomNonce(n){
-	let nonce=new Uint8Array(n);
+export function createRandomNonce(n) {
+	let nonce = new Uint8Array(n);
 	window.crypto.getRandomValues(nonce);
 	return Array.from(nonce);
 }