Bitcoin Optech newsletter #427 is here:

- summarizes the disclosure of two denial-of-service vulnerabilities in older versions of Eclair
- describes a proposed scheme for running complex multi-round contracts inside Lightning channels
- Optech Newsletter #427 Podcast
https://bitcoinops.org/en/newsletters/2026/10/16/

Erick Cestari posted to Delving Bitcoin the responsible disclosure of two denial-of-service (DoS) vulnerabilities in the channel opening process of Eclair v0.14.0 and earlier...
https://bitcoinops.org/en/newsletters/2026/10/16/#disclosure-of-two-dos-vulnerabilities-fixed-in-eclair-v0-14-1

Adam Gibson posted to the Bitcoin-Dev mailing list about a proposal for protocol, called LN-GAP, to run complex, multi-round, two-party contracts inside a Lightning channel while settling disputes onchain in a constant number of transactions...
https://bitcoinops.org/en/newsletters/2026/10/16/#offchain-contracts-in-lightning-channels

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