Bitcoin Optech newsletter #422 is here:

• describes a proposed protocol for probabilistic coinjoins disguised as covert bets
• summarizes benchmarks of a silent payments indexing server against compact block filters for light clients
• Optech Newsletter #422 Podcast
  https://bitcoinops.org/en/newsletters/2026/09/11/

Adam Gibson posted to Delving Bitcoin about Babilonia, a proposal for a new probabilistic coinjoin and covert betting protocol...
https://bitcoinops.org/en/newsletters/2026/09/11/#a-protocol-for-probabilistic-coinjoin-and-covert-betting

Rob Segers posted to the Bitcoin-Dev mailing list providing specifications for silent payments light clients and measuring performance of different ways to retrieve data from blocks...
https://bitcoinops.org/en/newsletters/2026/09/11/#update-on-silent-payments-light-clients

Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.