Not talking about RGB, not talking about Bitlight, let’s chat about what Payjoin is (this is a BTC-native technology, consider it a little explainer). The Payjoin mechanism, also known as 'Pay-to-Endpoint' (P2EP), is part of BTC’s BIP 78 proposal. The entire coordination process is handled by a network endpoint operated by the receiver. This endpoint’s address, along with the payment address and amount information, is transmitted using the BIP-21 format URI. ☀️ From a technical perspective, anyone making transactions on the Bitcoin blockchain can use Payjoin. So, this isn’t some kind of exclusive technology. Then why use Payjoin? 1. Transaction privacy 2. Save on fees 3. Consolidate UTXO sets What is Payjoin? Imagine A uses a $100 bill to pay B $50, and then gets $50 back as change (change output). A Payjoin transaction, on the other hand, is like A and B each pulling out some smaller bills to jointly make up the exact $50 payment. This avoids the obvious ownership link created by 'change,' thereby enhancing privacy.