Bitcoin Optech: Newsletter #339 Recap

Mark “Murch” Erhardt and Dave Harding are joined by Matt Morehouse and 0xB10C to discuss Newsletter #339.

News

● Vulnerability in LDK claim processing (0:47)

● Replacement cycling attacks with miner exploitation (17:28)

● Updated stats on compact block reconstruction (23:56)

Selected Q&A from Bitcoin Stack Exchange

● Who uses or wants to use PSBTv2 (BIP370)? (32:38)

● In the bitcoin's block genesis, which parts can be filled arbitrarily? (34:41)

● Lightning force close detection (36:47)

● Is a segwit-formatted transaction with all inputs of non-witness program type valid? (40:01)

● P2TR Security Question (41:41)

● What exactly is being done today to make Bitcoin quantum-safe? (44:27)

● What are the harmful effects of a shorter inter-block time? (47:57)

● Could proof-of-work be used to replace policy rules? (51:19)

● How does MuSig work in real Bitcoin scenarios? (54:54)

● How does the -blocksxor switch that obfuscates the blocks.dat files work? (57:18)

● How does the related key attack on Schnorr signatures work? (59:42)

Releases and release candidates

● LDK v0.1.1 (1:01:19)

Notable code and documentation changes

● Bitcoin Core #31376 (1:03:24)

● Bitcoin Core #31583 (1:04:48)

● Bitcoin Core #31590 (1:05:40)

● Eclair #2982 (1:07:17)

● BDK #1614 (1:11:39)

● BOLTs #1110 (1:12:08)