For the hackathon I developed a proof of concept of this wallet with all the ui working where you could scan a qr code that is shown at the main page of  your chatWallet and start chatting and making transactions with other peers. I used GHO as base token, chainlink’s CCIP for multi chain txs and  XMTP protocol for communication. My innovative solution was to include peer gas payments (using meta transactions), but I didn't manage to finish the prototype in time.