function validateBase64(s) {
    if (!(/^(?:[A-Za-z0-9+\/]{2}[A-Za-z0-9+\/]{2})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/.test(s))) {
        throw new TypeError('invalid encoding');
    }
}

function decodeBase64(s) {
    validateBase64(s);
    var i, d = atob(s), b = new Uint8Array(d.length);
    for (i = 0; i < d.length; i++) b[i] = d.charCodeAt(i);
    return b;
};

async function getNotificationCount() {
    let secret = null;
    if ('secret' in self) {
        secret = self.secret;
        const secretUint8Array = decodeBase64(secret);
    } 
    return secret;
}

self.getNotificationCount = getNotificationCount;