Include padding

Author: DanGould

bip-???-payjoin-v2.mediawiki

@@ -176,9 +176,7 @@ OHTTP relays can be run as basic HTTP proxies from wallet providers. Getting OHT
 
 ===Message Padding===
 
-TODO ??? TODO
-
-All cyphertexts should be padded to the same length to prevent traffic analysis. This is not yet implemented in the reference implementation.
+All cyphertexts should be padded to the same length of 7168 bytes to prevent traffic analysis. This is sufficient size for most transaction PSBTs without exceeding the 8KB limit of many HTTP/1.1 web servers.
 
 ===Secp256k1 Hybrid Public Key Encryption===