fix(qr): b64 padding and content addition

also fixes the example where refresh count should be updated

examples/generate-pay-qr-code.ts

@@ -1,5 +1,5 @@
 import * as izly from "../src";
-import { read } from "./_persisted-session";
+import { persist, read } from "./_persisted-session";
 import { toString as qrcode } from "qrcode";
 
 void async function main () {
@@ -10,4 +10,6 @@ void async function main () {
   qrcode(data, { type: "utf8" }, (_, qr) => {
     console.log(qr);
   });
+
+  await persist(identification);
 }();

src/api/private/otp.ts

@@ -1,8 +1,8 @@
-import { base64, base64url } from "@scure/base";
+import { base64urlnopad } from "@scure/base";
 import { packBigEndian } from "~/core/pack";
 import { hashWithHMAC } from "~/core/hmac";
 
 export const otp = (seed: string, counter: number): string => {
   const packedCounter = packBigEndian(counter);
-  return base64url.encode(hashWithHMAC(packedCounter, base64.decode(seed)));
+  return base64urlnopad.encode(hashWithHMAC(packedCounter, base64urlnopad.decode(seed)));
 };

src/api/qr-pay.ts

@@ -31,7 +31,7 @@ const signWithPrivateKey = (textToSign: string, pem: string): Uint8Array => {
  */
 export const qrPay = (identification: Identification): string => {
   // Replicate `SimpleDateFormat("yyyy-MM-dd HH:mm:ss")`
-  const dateFormatter = new Intl.DateTimeFormat("en-CA", { timeZone: "UTC", year: "numeric", month: "2-digit", day: "2-digit", hour12: false, second: "2-digit", minute: "2-digit", hour: "2-digit" });
+  const dateFormatter = new Intl.DateTimeFormat("fr-CA", { timeZone: "UTC", year: "numeric", month: "2-digit", day: "2-digit", hour12: false, second: "2-digit", minute: "2-digit", hour: "2-digit" });
   const dateNowFormatted = dateFormatter.format(new Date()).replace(",", "");
 
   let hotpCode = otp(identification.seed, identification.refreshCount);
@@ -45,5 +45,7 @@ export const qrPay = (identification: Identification): string => {
   content = content + ";" + bytesToHex(hashWithHMAC(`${content}+${identification.nsse}`, hmacKey)) + ";";
 
   const signed = signWithPrivateKey(content, privateKey);
-  return base64.encode(signed);
+  content += base64.encode(signed);
+
+  return content;
 };