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WhatsApp library for NodeJS that connects through the browser app
...The object-oriented approach makes it easy to get running quickly. Since whatsapp-web.js works by running WhatsApp Web in the background and automating its interaction, you'll need to authorize the client by scanning a QRcode from WhatsApp on your phone. After scanning this QRcode, the client should be authorized and you should see a Client is ready! message being printed out.
The first messaging platform operating without user identifiers
...Many communication platforms are vulnerable to MITM attacks by servers or network providers. To prevent it SimpleX apps pass one-time keys out-of-band when you share an address as a link or a QRcode. Double-ratchet protocol. OTR messaging with perfect forward secrecy and break-in recovery. NaCL cryptobox in each queue to prevent traffic correlation between message queues if TLS is compromised.