5:30pm - Doors open and social half hour
6:30pm - BitDevs Socratic Seminar
9:00pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

Bitcoin Projects

ARK Protocol

• Arkade Money: https://arkade.money
• Arkade OS Documentation: https://docs.arkadeos.com/
• Second Tech: https://second.tech
• Bark Implementation: https://codeberg.org/ark-bitcoin/bark
• ARK Protocol Documentation: https://docs.second.tech/ark-protocol/intro/

Chain-Code Delegation & Privacy in Collaborative Multisig

• BitKey Blog Post: https://bitkey.build/chain-code-delegation-improving-privacy-in-collaborative-multisig/
• BIP Pull Request: https://github.com/bitcoin/bips/pull/2004?ref=bitkey.build
• Delving Bitcoin Discussion: https://delvingbitcoin.org/t/chain-code-delegation-private-access-control-for-bitcoin-keys/1837
• Learn Me A Bitcoin - HD Wallets Chain Code: https://learnmeabitcoin.com/technical/keys/hd-wallets/#why-chain-code

Home Hashrate

• SV2 Translator for StartOS: https://github.com/PioneerHash/sv2-translator-startos
• Stratum with Iroh: https://github.com/average-gary/stratum/tree/iroh
• Iroh: https://github.com/n0-computer/iroh

Research & Development

Block Template Sharing

• Delving Bitcoin Discussion: https://delvingbitcoin.org/t/sharing-block-templates/1906
• Bitcoin Inquisition BIN-2025-0002: https://github.com/bitcoin-inquisition/binana/blob/613ac5228846b6fa3b8422707a827e75803f3d6e/2025/BIN-2025-0002.md

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

Ric and Dawn Duques Hall
GW Business School
22nd Street NW, Room 251
Washington, DC

Agenda

6:00pm - Doors open and social half hour
6:30pm - BitDevs Socratic Seminar
9:00pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

News

• The E-Cash App released for Android
  • https://ecash.love/
• Cake wallet releases cupcake signer
  • https://blog.cakewallet.com/meet-cupcake-your-new-secret-weapon-for-crypto-security/
• Further pushes by Google to restrict Android’s openness
  • Android requiring apps to be registered by verified developers
    • https://developer.android.com/developer-verification
• Calyx OS no longer providing updates for the forseeable future
  • https://calyxos.org/news/2025/08/01/a-letter-to-our-community/

Bitcoin Projects

• Bitcoin Core PRs
  • Testnet 4 re-org: https://github.com/bitcoin/bitcoin/pull/31117
  • https://github.com/bitcoin/bitcoin/pull/33106
• Floresta
  • https://github.com/vinteumorg/Floresta

Research

• Garbled Locks for Bitcoin
  • https://eprint.iacr.org/2025/1485
• Cryptography Camp Workbook
  • https://github.com/cryptography-camp/workbook/releases/tag/release_2025.09.09_12-24

Policy

• US Department of Commerce blockchain GDP report
  • https://www.commerce.gov/news/press-releases/2025/08/department-commerce-posts-2nd-quarter-gross-domestic-product-blockchain

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

GW University
Elliot School of International Affairs
1957 E St NW
Room 213
Washington, DC

Agenda

5:30pm - Doors open and social hour
6:30pm - BitDevs Socratic Seminar
9:30pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

Lightning Projects

• LightSpark Discussion
  • https://github.com/lightsparkdev
  • https://youtu.be/y89MduOPjdI

Research

• Bitcoin Covenant Toolkit (CTV/CSFS)
  • https://hackmd.io/@AbdelStark/bitcoin-covenant-toolkit-ctv-csfs
• Chain Code Delegation: Private Access Control for Bitcoin Keys
  • https://delvingbitcoin.org/t/chain-code-delegation-private-access-control-for-bitcoin-keys/1837
• CISA Playground
  • https://github.com/fjahr/cisa-playground

Resources

• Nashville BitDevs topic finding guide: https://nashbitdevs.org/about/find-topics/

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

MicroStrategy HQ, 1850 Towers Crescent Plaza, Tysons Corner, VA 22182

Agenda

5:30pm - Doors open and social hour
6:30pm - BitDevs Socratic Seminar
9:30pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

News

• Steak and Shake accepts Bitcoin
  • https://x.com/SteaknShake/status/1923426316478558571
• Block to roll out accepting bitcoin payments on square terminals
  • https://squareup.com/us/en/press/block-to-roll-out-bitcoin-payments-on-square
  • https://www.forbes.com/sites/digital-assets/2025/05/31/bitcoin-breaks-a-guinness-world-record-with-4000-pos-payments/

Bitcoin

• Relay policy merged into core
  • https://bitcoincore.org/en/2025/06/06/relay-statement/
  • https://knotsgoup.vercel.app/
• Bitcoin devs sign letter advocating for CTV+CSFS
  • https://ctv-csfs.com
• BDK-wallet 2.0.0
  • https://github.com/bitcoindevkit/bdk_wallet/releases/tag/wallet-2.0.0
• NFC support for reading NFC in Phoenix
  • https://github.com/ACINQ/phoenix/releases/tag/android-v2.6.1
  • https://github.com/btcpayserver/BTCPayServer.Lightning/pull/169

Lightning

• Stable channels
  • https://stablechannels.com/
• Yield bros rejoice
  • https://x.com/ambosstech/status/1928194644699140509
  • https://x.com/moneyball/status/1930259490076553719
  • https://x.com/bitrefill/status/1930217463779676334

Policy

• Clarity Act
  • https://www.congress.gov/bill/119th-congress/house-bill/3633/text/ih
  • https://saveourwallets.org/

Research

• Utxo dust clearing
  • https://delvingbitcoin.org/t/dust-expiry-clean-the-utxo-set-from-spam/1707
  • https://research.mempool.space/utxo-set-report/
• SCEWL - Sharing Coins Effectively with Ladders
  • https://supertestnet.github.io/scewl/
• LOCK protocol
  • https://github.com/bramkanstein/lock-protocol
• New Opcodes
  • https://github.com/rustyrussell/bips/blob/207e292ac989c8b628feed31f22020764b6b71e9/bip-unknown-covenant-support-opcodes.mediawiki

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

MicroStrategy HQ, 1850 Towers Crescent Plaza, Tysons Corner, VA 22182

Agenda

5:30pm - Doors open and social hour
6:30pm - BitDevs Socratic Seminar
9:30pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

News

• Coldcard enables Co-signing and unveils Key teleport for Q devices.
  • https://coldcard.com/docs/coldcard-cosigning/#enable-ccc/
  • https://github.com/Coldcard/firmware/blob/master/docs/key-teleport.md/
• Ember One release emberOne/00
  • https://github.com/256-Foundation/emberone00-pcb/releases/tag/v3-release/
• Coinbase says customers’ personal information stolen in data breach
  • https://techcrunch.com/2025/05/15/coinbase-says-customers-personal-information-stolen-in-data-breach/
  • https://primal.net/e/nevent1qvzqqqqqqypzpaegm8nwwpyrtrnsjv84efjtp9mhpkvfenvxs487vx8d48y28qgxqqswpsjngm89cplj7v826328xgew938nqra95wfamresz2m5pltszqcq5jnxt
• Critical BTC Pay Server Bug
  • https://xcancel.com/BtcpayServer/status/1922845019494318519

Bitcoin

• datacarrier limit
  • https://github.com/bitcoin/bitcoin/pull/32359/
  • https://github.com/bitcoin/bitcoin/pull/32406/
  • https://gist.github.com/instagibbs/c436110890ab25aa9997b13c2270d5ce/
• Taproot fields Arbitrary Data
  • https://github.com/bitcoin/bitcoin/pull/32453/
  • https://xcancel.com/rot13maxi/status/1921345826800152907
  • https://mempool.space/tx/b78748f2ee3222d9bf4b23ab917136c745531ccc5ef8097235d11e16483e466f
  • https://xcancel.com/rot13maxi/status/1923087628594794800
  • https://mempool.space/tx/cb3cbedca4fa4aa4d1d583dc8f4add5cdba0c89b31b4abb2ce67688323081847
• Age-old denomination debate (New BIP number assigned)
  • https://github.com/bitcoin/bips/blob/master/bip-0176.mediawiki/
    • https://event.bitcoin.design/#project-reczoE4WXQpKW5pZA/
  • https://github.com/bitcoin/bips/blob/master/bip-0177.mediawiki/
• parasite pool
  • https://parasite.space
• Rust Bitcoin add MuSig2 support
  • https://github.com/rust-bitcoin/rust-secp256k1/pull/716

Lightning

• Path Queries
  • https://delvingbitcoin.org/t/path-queries-addressing-payment-reliability-and-routing-limitations/1672/

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

Tysons Biergaten, 7581 Colshire Drive, McLean, VA

Agenda

5:30pm - Doors open and social hour
6:30pm - BitDevs Socratic Seminar
9:30pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

News

• Phoenix wallet returns (did they ever really leave?)
  • https://primal.net/e/nevent1qvzqqqqqqypzpwd9xafrhw30ekhg2lvsmznkphj0yyuun7gdnphhgl886rkq69eaqythwumn8ghj7un9d3shjtnwdaehgu3wvfskuep0qyghwumn8ghj7mn0wd68ytnhd9hx2tcqyruv7um30hu6j8fhqf032crwqc5zec6kjlzuacfugl8php6k3sjz6t6xcrs
• US DoJ End Crypto Enforcement Unit
  • https://primal.net/e/nevent1qvzqqqqqqypzpwd9xafrhw30ekhg2lvsmznkphj0yyuun7gdnphhgl886rkq69eaqy2hwumn8ghj7erfw36x7tnsw43z7un9d3shjqghwaehxw309aex2mrp0yh8qunfd4skctnwv46z7qpqf0kxjlvtlzrh9emvxl77252lwqazd54sw4kwyhmwple8528qdhqszu60g9
• Key Dates Set for Samourai Wallet Developers Pre-trial Motion Schedule
  • https://primal.net/e/nevent1qvzqqqqqqypzpwd9xafrhw30ekhg2lvsmznkphj0yyuun7gdnphhgl886rkq69eaqqspyysw32c9ftp4fa0u99kl676l5rdhr5y4g3fmvjf0qv5ysx0xy6chxuxhn
• Braiins BCB100: Bitcoin Control Board Open Sourced
  • https://primal.net/e/nevent1qvzqqqqqqypzpwd9xafrhw30ekhg2lvsmznkphj0yyuun7gdnphhgl886rkq69eaqqsr63sre5853rw647wmjtvvj0rr97km7gu9nlffc6vx54gy3cnxutcwtc0mx
• Demand Pool Opens Applications to Miners for Stratum V2 Mining Pool
  • https://primal.net/e/nevent1qvzqqqqqqypzpwd9xafrhw30ekhg2lvsmznkphj0yyuun7gdnphhgl886rkq69eaqqsxt6kn4k4uxhtmz9txxxsqfzdutdmrzyekpnndzvj7z4rvr8vcerq2zcgvt

Bitcoin

• Bitcoin Core 29.0rc3 w/ Testing Guide
  • https://bitcoincore.org/bin/bitcoin-core-29.0/
  • https://github.com/bitcoin-core/bitcoin-devwiki/wiki/29.0-Release-Candidate-Testing-Guide
• BDK Detect and Evict Tx’s that are Double Spent
  • https://github.com/bitcoindevkit/bdk/pull/1839
• Rust Bitcoin Pay-to-Anchor support
  • https://github.com/rust-bitcoin/rust-bitcoin/pull/4111/files
• Bitcoin’s Signature Types - SIGHASH
  • https://raghavsood.com/blog/2018/06/10/bitcoin-signature-types-sighash/
  • https://learnmeabitcoin.com/technical/keys/signature/
• Bitkey 🤝 BDK
  • https://bitkey.build/bitkeys-inheritance-feature-a-technical-deep-dive/

Lightning

• rust-lightning - Implement Quiescence Protocol
  • https://github.com/lightningdevkit/rust-lightning/pull/3588
• ACINQ - Add support for using last_funding_locked tlv in channel_reestablish
  • https://github.com/ACINQ/eclair/pull/3007

Research / Misc

• BIP-360
  • https://bip360.org
  • Hashed keys are actually fully quantum secure https://groups.google.com/g/bitcoindev/c/jr1QO95k6Uc
• bitcoin-payment-instructions
  • https://docs.rs/bitcoin-payment-instructions/latest/bitcoin_payment_instructions/
• Anonymous Usage Tokens from Curve Trees (aut-ct)
  • https://github.com/AdamISZ/aut-ct
• FROSTr Explanation
  • https://fountain.fm/episode/gWYJ5PgxwzdnBjuNuzyc
• Safely Burning/Spending Dust
  • https://bitcoin.stackexchange.com/questions/125702/how-to-safely-spend-burn-dust
• Up-to-date Chain Reorg Stats
  • https://bitcoin.stackexchange.com/questions/126019/up-to-date-statistics-about-chain-reorganizations

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

MicroStrategy HQ, 1850 Towers Crescent Plaza, Tysons Corner, VA 22182

Agenda

5:30pm - Doors open and social hour
6:30pm - BitDevs Socratic Seminar
9:30pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

Mining is Winning

• AntPool & Friends
  • https://b10c.me/observations/14-antpool-and-friends-invalid-mining-jobs/
• BitAxe CK Pool miner hits a block
  • https://mempool.space/block/000000000000000000006414aea39be567cf1d5ff6cbf2d77254fe7c714b0d81

Bitcoin

• CTV
  • https://utxos.org
  • https://learn.sapio-lang.org/ch02-00-bip-119.html
  • https://bitcoinops.org/en/topics/op_checktemplateverify/
  • https://x.com/JeremyRubin/status/1895676912401252588
• CSFS
  • https://bitcoinops.org/en/topics/op_checksigfromstack/
• CAT
  • https://bitcoinops.org/en/topics/op_cat/

Security Vulnerability

• ESP-32
  • https://www.bleepingcomputer.com/news/security/undocumented-commands-found-in-bluetooth-chip-used-by-a-billion-devices/
  • https://www.documentcloud.org/documents/25554812-2025-rootedcon-bluetoothtools/
  • https://darkmentor.com/blog/esp32_non-backdoor/

Research

• FROST - Flexible Round Optimized Schnorr Threshold Signatures
  • https://www.frostr.org/
  • https://github.com/BlockstreamResearch/bip-frost-dkg

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

MicroStrategy HQ, 1850 Towers Crescent Plaza, Tysons Corner, VA 22182

Agenda

5:30pm - Doors open and social hour
6:30pm - BitDevs Socratic Seminar
9:30pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

Demo

• a visual Blockexplorer concept based on bitcoin metadata

Bitcoin Projects

• erlay
  • https://delvingbitcoin.org/t/erlay-filter-fanout-candidates-based-on-transaction-knowledge/1416
  • https://delvingbitcoin.org/t/erlay-select-fanout-candidates-at-relay-time-instead-of-at-relay-scheduling-time/1418
  • https://delvingbitcoin.org/t/erlay-find-acceptable-target-number-of-peers-to-fanout-to/1420
  • https://delvingbitcoin.org/t/erlay-define-fanout-rate-based-on-the-transaction-reception-method/1422
• weak blocks
  • https://delvingbitcoin.org/t/second-look-at-weak-blocks/805

Lightning Projects

• LND 18.5 release and vulnerability
  • https://x.com/PavolRusnak/status/1891967156104954164
  • https://github.com/lightninglabs/lightning-terminal/releases/tag/v0.14.1-alpha

Research

• HashPool
  • https://github.com/vnprc/hashpool
• 256 Foundation projects
  • https://256foundation.org
  • https://hydrapool.org
  • https://libreboard.org
  • https://blockwatcher.org
  • https://emberone.org
  • https://mujina.org

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

MicroStrategy HQ, 1850 Towers Crescent Plaza, Tysons Corner, VA 22182

Agenda

5:30pm - Doors open and social hour
6:30pm - BitDevs Socratic Seminar
9:30pm - Departure

Socratic Seminar

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

Bitcoin Projects

• kernel-node
  • https://github.com/TheCharlatan/kernel-node
  • https://github.com/bitcoin/bitcoin/issues/27587
  • https://thecharlatan.ch/Kernel/
• Payjoin
  • Bull Bitcoin Wallet
    • https://primal.net/e/nevent1qvzqqqqqqypzqk5wtq03dgqjufxj5eqp22k4vgzcevr9u80j36g8cxl6stq4pj96qqsx8k5rlytjf07mexnqh7tg8qt6y0ty54de5rtyql97v0cweg0zxysnnwt3j
  • Resources
    • https://satsie.dev/zines/payjoin
    • https://payjoindevkit.org
    • https://payjoin.org/docs/how-it-works/payjoin-v2-bip-77/
• cluster mempool: Implement changeset interface for mempool
  • https://github.com/bitcoin/bitcoin/pull/31122
• p2p: track and use all potential peers for orphan resolution
  • https://github.com/bitcoin/bitcoin/pull/31397
• Stratum V2
  • https://github.com/stratum-mining/stratum/releases/tag/v1.2.0
• Erlay: p2p: Fill reconciliation sets (Erlay) attempt 2
  • https://github.com/bitcoin/bitcoin/pull/30116

Lightning Projects

• Disclosure: irrevocable fees—stealing from LN using revoked commitment transactions
  • https://delvingbitcoin.org/t/disclosure-irrevocable-fees-stealing-from-ln-using-revoked-commitment-transactions/1314
• Support Trampoline flag in BOLT12 invoices #3446
  • https://github.com/lightningdevkit/rust-lightning/pull/3446
• ACINQ Peer storage
  • https://github.com/ACINQ/eclair/pull/2888

Research

• RadPool
  • https://www.radpool.xyz/1/index.html
• Bit Projects
  • https://bitprojects.io/statspage/

Submit suggestions for next meeting!

Issues on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/issues

September 12, 2023 @ 7PM

As a reminder, the ground rules of BitDevs are as follow:

1. No photos, videos, or recordings.
2. Chatham House Rule: you may reiterate the contents of the meeting without attribution.

These rules exist so that BitDevs participants can speak freely within the event.

Questions are encouraged, including basic ones!

Agenda

• BitForge
  • https://www.fireblocks.com/blog/bitforge-fireblocks-researchers-uncover-vulnerabilities-in-over-15-major-wallet-providers
• LastPass keys getting popped?
  • https://krebsonsecurity.com/2023/09/experts-fear-crooks-are-cracking-keys-stolen-in-lastpass-breach/
• Delving Bitcoin - https://delvingbitcoin.org/
  • What is this and why is it different from other chat platforms of the past?
• The fake channel DoS attack
  • https://morehouse.github.io/lightning/fake-channel-dos/
• Nucleus: Capital-efficient multipeer Lightning payment channels
  • https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2023-August/021897.html
• John Law: scaling lightning with CTV
  • https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2023-September/021941.html
  • https://github.com/JohnLaw2/ln-scaling-covenants
  • https://bitcoinops.org/en/newsletters/2023/03/29/
• “Thundering Herd”
  • https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2023-September/021943.html
• Combined APO/CTV in TXHASH
  • https://gist.github.com/reardencode/2aa98700b720174598d21989dd46e781
• “Sovereign” Rollups
  • https://decrypt.co/122833/rollkit-pitches-second-layer-for-bitcoin-sovereign-rollup
• How to do a coin join
  • Add commons tools here, explain various kinds
• Storm-0558 Key Acquisition
  • https://msrc.microsoft.com/blog/2023/09/results-of-major-technical-investigations-for-storm-0558-key-acquisition/
• codex32 booklet
  • https://twitter.com/Blockstream/status/1699888016725262652
• Bitcoin Fees Mistake
  • https://mempool.space/tx/d5392d474b4c436e1c9d1f4ff4be5f5f9bb0eb2e26b61d2781751474b7e870fd
• Better accounting rules for holding bitcoin on the balance sheet
  • https://cointelegraph.com/news/fasb-united-states-accounting-rules-companies-holding-crypto-2025

Submit suggestions for next meeting!

PR on Github: https://github.com/dcbitdevs/dcbitdevs.github.io/pulls