• Use a forum (telegram etc)?
• Use a specialised channel (BarterDex/Bisq)?
• Use an existing coin (mempool)?
• Alice should in principle be able to use the Smileycoin blockchain to announce

• SELL 1000 SMLY for 1 LTC

• and Bob could accept the offer by responding

• ACCEPT offer TxId`

• etc.

Could be done through modifications of smileycoin-qt

A draft proposal: https://tutor-web.info/news-1/announcing-intent-cross-chain-atomic-swap/

Dedicated wallets? https://atomicwallet.io/ (or scam?)