=== Code example ===
<code>
function verifyAssertion_verifyAssertion(aAssertion) {
// Make use of the [https://wiki.mozilla.org/Identity/Firefox_Accounts#Verifier remote verification API]
// and return the verified msisdn.
.then(
(assertion) => {
var msisdn = verifyAssertion_verifyAssertion(assertion); .then( (msisdn) => { // Do stuff with the msisdn. } );
},
(error) {