Implement Trade Chat

[julkascript]

The Trade Chat is a chat between the two traders. It should help the users arrange the trade details (shipment, delivery, etc.).

• From a technical POV, each message will have a sender. The sender can be any of the two users, or the "System" because there are sometimes system messages.
• The "Click to expand offer..." button opens the current offer modal.
• The chat can continue even after a deal is reached.
• A new chat is started per trade session.

Note: To simplify, the chat does not need to be responsive. Users can refresh to obtain the latest messages.

Figma design

[julkascript]

Some more pointers for this ticket.

The system will have to send a chat message when:

• a deal is reached (both sides accept)
• on rejection (deal is rejected)
• one of the sides negotiates
• on initial offer

The system message contains what happened (the event) and the content (look at Figma for more details).