Austin Bitcoin Developers
Events
Meetup
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Socratic 64
15 May 2025
Link to Meetup
Announcements
Respect people’s privacy
Interaction and asking questions are encouraged
Chatham House Rules
Bitcoin 2025
Bitcoin Designathon
BTC in D.C.
Semi-Regular Installment of Bitcoin Trivia!
trivia
Topics
Urgent
NBitcoin Crash
and
fix
Miners rolling nonstandard tx version numbers
NBX Explorer Nix-bitcoin Fix
Coinbase PII Breach & $20M Ransom
Stats
Mining Centralization Index
Cumulative OP_RETURN Output Values
OP_Return Update
LN Wallet Marketshare in Japan
Mempool.Space Lightning
Knots node % growth
@freeonlineuser
@SuperTestnet
@sr_gi
@lopp
Misc.
Peach GroupHug
Musig2 module merged in rust-bitcoin rust-secp256k1
BIP30 consensus failure vulnerability
LND 0.19.0-beta.rc4 - new RBF-based fee bumping for cooperative closes
Standardized backup for wallet descriptors
script type value 3 for taproot (P2TR) derivations in deterministic multisig wallets with the m/48’ prefix
Bitkey self-custody
Coldcard co-sign
cve-2025-43707/
Post Quantum Signatures and Scaling Bitcoin
Removing checkpoints in Bitcoin Core v30
Hourglass BIP
64-bit arithmetic in Script
Legacy wallet removal
Research
Round-Efficient Adaptively Secure Threshold Signatures with Rewinding
Thunderbolt: A Formally Verified Protocol for Off-Chain Bitcoin Transfers
ECDSA Cracking Methods
Mining
Parasite Pool
Filter Wars (“Core Dev”s versus “Pleb Podcasters” LARP)
Relax OP_RETURN standardness restrictions
PR closed - Remove arbitrary limits on OP_Return (datacarrier) outputs #32359
Rebuttal arguments against lifting filter limits for OP_RETURN
For
Pieter Wuille
Against
Jason Hughes
Recent Developments
Policy
F2Pool quietly dropped their minimum relay fee
Non standard txs mined since last halving
Brc-20 in op_return
More non-standard txs and mempool shenanigans
Cost of sending large op_returns with filters
Garabageman
Tx-Pigeon
Largest OP_Return
Private Mempool services
Hop-Return, new op_return based metaprotocol
Runtime BTC Knots policy changes
Circumventing filters
4kb of data in the control block