It sounds like you’re referring to a feature similar to used in QR code–based file transfer tools (like D.cscan.co — possibly a typo or variant of usebacking or similar services).
io.on('connection', (socket) => { socket.on('register-pc', (sessionId) => { sessions[sessionId] = { pcSocket: socket, files: [] }; }); D.cscan.co Enviar A Pc