Mark “Murch” Erhardt and Dave Harding are joined by Bastien Teinturier and Rodolfo Novak to discuss Newsletter #281. News Discussion about griefing liquidity ads (0:46) Changes to services and client software Stratum v2 mining pool launches (15:43) Bitcoin network simulation tool warnet announced (16:31) Payjoin client for Bitcoin Core released (17:30) Call for community block arrival timestamps (18:44) Envoy 1.4 released (21:41) BBQr encoding scheme announced (22:09) Zeus v0.8.0 released (22:45) Selected Q&A from Bitcoin Stack Exchange What are all the rules related to CPFP fee bumping? (25:16) How is the total number of RBF replaced transactions calculated? (29:41) What types of RBF exist and which one does Bitcoin Core support and use by default? (31:37) What is the Block 1,983,702 Problem? (34:48) What are hash functions used for in bitcoin? (45:12) Releases and release candidates LND 0.17.3-beta (51:59) Notable code and documentation changes LDK #2685 (52:22) Libsecp256k1 #1446 (53:04) BTCPay Server #5389 (53:36) BTCPay Server #5490 (59:54)