Intro

• Thank you to our sponsors for food, refreshments and event space
• To donate: click here
• Join our Signal group
• Next bitdevs is September 23 from 7pm to 9pm
• Any not previously published announcements

Always remember

• Respect the privacy of the participants
• Interaction and asking questions are encouraged
• Chatham House Rules

Red alert situations

• Many coldcard hardware wallets vulnerable to theft
• How the coldcard bug works
• Dropkick is a “rescue” protocol for use in the event of a quantum emergency in bitcoin
• Boltz Exchange warrant canary expires – assume the worst?

L2s and similar services

• Lightning Labs announces a third implementation of Ark
• Someone implemented a channel factory design called SuperScalar
• Private asset exchange based on Mercury statechain
• Lightning spec repo merges Bolt12 Payment Proofs

Bitcoin and AI

• Spiral adds an AI division to their bitcoin R&D team
• Project Loupe comes out to use AI to scan bitcoin projects for vulnerabilities
• Boltz Exchange disabled due to AI hackers
• Bitgo CEO challenges Anthropic AI to hack his bitcoin wallet

Arbitrary data

• Chris Guida prepares a PoW change for BIP110 “just in case”
• Checking in on BIP110: was there a chain split?
• Minting runes at a discount via P2A addresses

Miscellaneous

• Bitmex is shutting down
• SpaceX reports $540 million loss on their bitcoin holdings

Intro

• Thank you to our sponsors for food, refreshments and event space
• To donate: click here
• Join this secondary Signal group if interested in side events
• Next bitdevs is August 19 from 7pm to 9pm
• Any not previously published announcements

Always remember

• Respect the privacy of the participants
• Interaction and asking questions are encouraged
• Chatham House Rules

Privacy improvements

• Sparrow Wallet supports receiving silent payments now
• New web wallet supports silent payments, Ark, and LN
• More private swaps between Ark and bitcoin L1
• Joinstr adds a new sybil resistance mechanism
• Joinmarket-NG adds mempool support

Arbitrary data

• Alex Newman’s research on Client Side Validated data [no link – original research]
• LifoFifo proposes a way to make inscriptions bip110 compatible
• Ocean opts its stratum v1 miners into signaling for bip110, with a way to opt out
• SegData bip wants to make a prunable place for arbitrary data
• Hodlonaut’s essay on the culture of bitcoin core’s maintainers and associates
• Juan’s Project [no link – original software demo]

Unusual transactions

• Openoms demonstrates an “emergency exit” from Spark
• Stutxo demonstrates an “emergency exit” from Bark
• Bitvm company does a garbled circuit on chain

Stratum v2

• Brains Hashpower adds stratum V2 support
• First ever bitcoin block mined via stratum V2?
• First ever pool with a dedicated stratum V2 port?

New Toys

• Lightning Dev Kit announces offline-friendly LN payments
• New hardfork called “ecash”
• Prototype of Ark integration for btcpay

Software updates

• Devs are preparing Testnet 5
• LND makes more progress with implementing bolt12 support
• Vanilla js library adds support for output descriptors / and bip157

Miscellaneous

• Rusty Russel announces his retirement from Blockstream
• Who ran the first four bitcoin nodes?

Intro

• Thank you to our sponsors for food, refreshments and event space
• To donate: click here
• Donny Clutterbuck and Super Testnet are now on the leadership committee for the San Juan Bitdevs
• Michael has a merchandise announcement
• We wish to hold a vote about changing the time for future bitdevs from 7-9 pm to 6-8 pm
• We want to start organizing side events, like ping pong, billiards, and beach days. Join this secondary Signal group if interested
• Next bitdevs is scheduled for Wednesday, July 29, same location, time TBA based on the aforementioned vote
• Any not previously published announcements

Always remember

• Respect the privacy of the participants
• Interaction and asking questions are encouraged
• Chatham House Rules

New Toys

• The Cube
• A second implementation of Ark launched on mainnet
• Zero Knowledge Ecash
• Coin-stealing vulnerability found in popular cashu server software
• Cashu inventor proposes “unruggable mints”
• Arbed Out launches Sigbash, a smart contracting tool for bitcoin
• Ditto launches and brings L1 tipping to nostr

Transaction analysis

• Inscriptions propping up mining fees
• Puzzle transaction
• 3d lightning network explorer that shows actual transactions (but only channel opening txs)

Miscellaneous

• BIP110 debate featuring Chris Guida and Super Testnet
• Polish “Blik” payment system gets a bitcoin bridge
• Successor to Bitnodes launches
• First instance of cross-platform CLINK payment (proposed successor to LNURL and BOLT12)