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

The Bitcoin Optech Podcast and transcription content is licensed Creative Commons CC BY-SA 2.0


  • 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


transcription coming soon