1/ How do we design a 𝐜𝐡𝐚𝐭 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 like WhatsApp, Facebook Messenger or Discord? The diagram below shows a design for a simplified 1 to 1 chat

1/ How do we design a 𝐜𝐡𝐚𝐭 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧 like WhatsApp, Facebook Messenger or Discord? The diagram below shows a design for a simplified 1 to 1 chat