SE API usage example

seapi.js

var openSession = function(readers) {
    var seReader = readers.filter(function(reader) {
        return reader.type === 'uicc';
    })[0];

    if (!seReader) {
        return Promise.reject('No suitable SE found');
    }
    
    return seReader.openSession();
};

var openChannel = function(session) {
    var testAIDBuffer = ['0', '1', '2'];
    var mastercardAID = new Uint8Array(testAIDBuffer);
    return session.openLogicalChannel(mastercardAID);
};

var sendFirstAPDU = function(channel) {
    var apdu = new SECommand('A', 'B', 'C', 'D');
    return channel.transmit(apdu);
};

var sendSecondAPDU = function(response) { 
    // Do sth wit the response
    var apdu = new SECommand('1', '2', '3', '4'); 
    return response.channel.transmit(apdu);
};

var updateUI = function() {
    console.log('All okay');
};

var showError = function(error) {
    console.error(error);
};

var cleanup = function(response) {
    return response.channel.reader.closeAll(); 
};

var sedom = window.navigator.mozSEManager;
var pRdrs = sedom.getSEReaders();

pRdrs.then(openSession)
     .then(openChannel)
     .then(sendFirstAPDU)
     .then(sendSecondAPDU)
     .then(cleanup)
     .then(updateUI)
     .catch(showError);

Security around field enter/leave events - do we want to constrain this somehow?