The write-up
Kakaonut lets you hide bitcoin in the form of ecash inside the pixels of a photo. Users can copy and paste the photo into KakaoTalk and send the photo to their friends. Their friends can then they paste it into the Kakaonut website. It reads the hidden bits and allows the user to claim the ecash hidden in the photo. User can send the payment to their own lightning address or claim it in the Kakaowallet, a fork of Cashu.me.