Coinbase payouts, changing consensus - Bitcoin Optech Newsletter #421

Bitcoin Optech newsletter #421 is here:

• describes an idea for pools to pay miners using silent payments in the coinbase transaction
• summarizes the responsible disclosure of a denial-of-service vulnerability affecting older versions of Core Lightning
• continues discussion of PQC output types
• summarizes the DropKick commit/reveal PQC rescue idea
• links to the SHRINCS draft BIP
• examines several BIP448 and CSFS/CTV demos and applications
• Optech Newsletter #421 Podcast https://bitcoinops.org/en/newsletters/2026/09/04/

average_gary posted to Delving Bitcoin about his idea for how pools could pay miners to different addresses directly in the coinbase transaction... https://bitcoinops.org/en/newsletters/2026/09/04/#using-silent-payments-for-miner-payouts-in-coinbase-transaction

Erick Cestari posted to Delving Bitcoin the responsible disclosure of a critical denial-of-service (DoS) vulnerability affecting CLN nodes running versions prior to 25.09... https://bitcoinops.org/en/newsletters/2026/09/04/#responsible-disclosure-of-a-denial-of-service-vulnerability-in-cln

Following last month’s summary of Pieter Wuille’s Delving Bitcoin thread on post-quantum output types, Wuille replied to Conduition’s argument that pairing CISA with P2TRv2 would strongly incentivize migration... https://bitcoinops.org/en/newsletters/2026/09/04/#continued-discussion-of-pqc-output-types

Conduition posted to the Bitcoin-Dev mailing list a sketch of DropKick, a commit/reveal post-quantum rescue protocol for users who have not moved coins to PQC-enabled outputs by Q-day... https://bitcoinops.org/en/newsletters/2026/09/04/#dropkick-commit-reveal-pqc-rescue

Conduition posted to the Bitcoin-Dev mailing list, on behalf of the SHRINCS working group, a first draft specifying SHRINCS as a semi-stateful hash-based signature scheme for Bitcoin... https://bitcoinops.org/en/newsletters/2026/09/04/#shrincs-draft-bip

Work around BIP448 continues with new sites aggregating demos, implementations, and proofs of concept... https://bitcoinops.org/en/newsletters/2026/09/04/#bip448-and-csfs-ctv-demos-and-applications

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