Bitcoin Optech: Newsletter #403 Recap

What this episode covers

Gustavo Flores Echaiz and Brandon Black are joined by Olaoluwa Osuntokun to discuss Newsletter #403.News● Binary fuse filters as an alternative to BIP158's GCS (19:05) Changing consensus● Post-quantum HD wallets with fallback SPHINCS keys (31:07) ● Discussion of a post-quantum output type (34:42) ● Proposal to embed post-quantum keys in tapscript without consensus changes (38:03) ● BIP54 demonstration of slow blocks on signet (43:28) ● Post-quantum BIP86 recovery using zk-STARK proofs of BIP32 seeds (1:05) Releases and release candidates● Core Lightning 26.04.1 (48:16) ● BTCPay Server 2.3.8 (50:15) ● BTCPay Server 2.3.9 (51:52) Notable code and documentation changes● Bitcoin Core #33671 (52:39) ● Bitcoin Core #34885 (58:01) ● Bitcoin Core #33920 (59:57) ● Bitcoin Core #34911 (1:02:00) ● BIPs #1548 (1:04:47) ● HWI #831 (1:08:17) ● BDK #2188 (1:09:11) ● BDK #2115 (1:10:14)

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Frequently Asked Questions

How long is this episode of Bitcoin Optech Podcast?

This episode is 1 hour and 12 minutes long.

When was this Bitcoin Optech Podcast episode published?

This episode was published on May 6, 2026.

What is this episode about?

Gustavo Flores Echaiz and Brandon Black are joined by Olaoluwa Osuntokun to discuss Newsletter #403.News● Binary fuse filters as an alternative to BIP158's GCS (19:05) Changing consensus● Post-quantum HD wallets with fallback SPHINCS keys (31:07) ●...

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