Bitcoin Optech: Newsletter #210 Recap

Mark “Murch” Erhardt and Mike Schmidt are joined by Ruben Somsen to discuss Newsletter #210.

News

• Multiformat single-sig message signing (2:05)
• Proof of micro-burn (9:43)

Selected Q&A from Bitcoin Stack Exchange

• Why do invalid signatures in `OP_CHECKSIGADD` not push to the stack? (30:41)
• What are packages in Bitcoin Core and what is their use case? (34:17)
• How much blockspace would it take to spend the complete UTXO set? (37:43)
• Does an uneconomical output need to be kept in the UTXO set? (39:37)
• Is there code in libsecp256k1 that should be moved to the Bitcoin Core codebase? (47:07)
• Mining stale low-difficulty blocks as a DoS attack (48:32)

Notable code and documentation changes

• Bitcoin Core #25351 (51:42)
• Core Lightning #5370 (53:51)
• BOLTs #1001 (56:25)