Bitcoin Optech newsletter #417 is here:
- describes a draft BIP for relaying stale block tips between peers
- summarizes a draft BIP for cross-input signature aggregation
- examines a design for attaching post-quantum witness data
- links to a discussion of post-quantum output types
- summarizes discussions around transaction expiry
- points to a proposal for layered quantum recovery of hashed addresses
- describes a proposal to add a prunable block region for arbitrary data
- Optech Newsletter #417 Podcast
https://bitcoinops.org/en/newsletters/2026/08/07/
Ram and w0xlt posted to the Bitcoin-Dev mailing list about the proposal for an opt-in P2P message for relaying stale tips between peers...
https://bitcoinops.org/en/newsletters/2026/08/07/#draft-bip-for-stale-tip-relay
Fabian Jahr posted to the Bitcoin-Dev mailing list a draft of BIP460 for transaction-wide cross-input signature aggregation (CISA) of taproot-style keypath spends...
https://bitcoinops.org/en/newsletters/2026/08/07/#cisa-for-taproot-keypath-spends-bip460
Pieter Wuille posted to Delving Bitcoin a design for attaching post-quantum witness data without repeating all of segwit’s deployment costs...
https://bitcoinops.org/en/newsletters/2026/08/07/#segwit-commitment-to-post-quantum-witness-data
Pieter Wuille opened a Delving Bitcoin thread to centralize discussion of post-quantum output types...
https://bitcoinops.org/en/newsletters/2026/08/07/#pqc-output-type-discussion
Josh Doman posted to Delving Bitcoin a construction for expiring HTLCs without free relay, then generalized it in a follow-up on input-triggered transaction expiry...
https://bitcoinops.org/en/newsletters/2026/08/07/#input-triggered-transaction-expiry
Shinobi posted to the Bitcoin-Dev mailing list and cross-posted to Delving Bitcoin a layered recovery plan for coins secured by hashed address types...
https://bitcoinops.org/en/newsletters/2026/08/07/#layered-quantum-recovery-of-hashed-addresses
MrHash posted to Delving Bitcoin companion BIP drafts for Segregated Data, a soft fork that would add a prunable, script-isolated block region for arbitrary data carriage...
https://bitcoinops.org/en/newsletters/2026/08/07/#segregated-data-segdata-bip-draft
Bitcoin Optech will host an audio recap discussion of this newsletter streaming live on X/Twitter Tuesday at 16:30 UTC.