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Bitcoin Optech: Newsletter #274 Recap
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Mark “Murch” Erhardt and Mike Schmidt are joined by Bastien Teinturier, Fabian Jahr, Ethan Heilman, and Armin Sabouri to discuss Newsletter #274.
News
- Replacement cycling vulnerability against HTLCs (1:40)
- Bitcoin UTXO set summary hash replacement (24:21)
- Research into generic covenants with minimal Script language changes (40:02)
- Proposed BIP for OP_CAT (45:38)
Selected Q&A from Bitcoin Stack Exchange
- How does the Branch and Bound coin selection algorithm work? (52:17)
- Why is each transaction broadcast twice in the Bitcoin network? (54:29)
- Why are OP_MUL and OP_DIV disabled in Bitcoin? (56:57)
- Why are hashSequence and hashPrevouts computed separately? (58:56)
- Why does Miniscript add an extra size check for hash preimage comparisons? (59:52)
- How can the next block fee be less than the mempool purging fee rate? (1:00:51)
Releases and release candidates
- Bitcoin Core 25.1 (1:12:00)
- Bitcoin Core 24.2 (1:12:00)
- Bitcoin Core 26.0rc1 (1:14:23)
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