WhatsApp is where you talk. kwataverse is where you get paid.
Show the code
https://kwataverse.com/p/naddr1qqfxymmwvasj6umdda4k2epdv3hh5etwqgsr5c5ukypqcwgn3nyqlt77u2txc062pm8pvnn4r27hxve2yzdmupcrqsqqqakzl8chsx
Point a camera at it. A neighbour across a stall can too.