@ 9ca447d2:fbf5a36d

Paris, France – June 6, 2025 — Bitcoin payment gateway startup Flash, just announced a new partnership with the “Bitcoin Only Brewery”, marking the first-ever beverage company to leverage Lightning payments.

Flash enables Bitcoin Only Brewery to offer its “BOB” beer with, no-KYC (Know Your Customer) delivery across Europe, priced at 19,500 sats (~$18) for the 4-pack, shipping included.

The cans feature colorful Bitcoin artwork while the contents promise a hazy pale ale: “Each 33cl can contains a smooth, creamy mouthfeel, hazy appearance and refreshing Pale Ale at 5% ABV,” reads the product description.

Pierre Corbin, Co-Founder of Flash, commented:

“Currently, bitcoin is used more as a store of value but usage for payments is picking up. Thanks to new innovation on Lightning, bitcoin is ready to go mainstream for e-commerce sales.”

Flash, launched its 2.0 version in March 2025 with the goal to provide the easiest bitcoin payment gateway for businesses worldwide. The platform is non-custodial and can enable both digital and physical shops to accept bitcoin by connecting their own wallets to Flash.

By leveraging the scalability of the Lightning Network, Flash ensures instant, low-cost transactions, addressing on-chain Bitcoin bottlenecks like high fees and long wait times.

For businesses interested in adopting Bitcoin payments, Flash offers a straightforward onboarding process, low fees, and robust support for both digital and physical goods. To learn more, visit paywithflash.com.

Media Contact:
Pierre Corbin
Co-Founder, Flash
Email: press@paywithflash.com
Website: paywithflash.com

About Flash

Flash is the easiest Bitcoin payment gateway for businesses to accept payments. Supporting both digital and physical enterprises, Flash leverages the Lightning Network to enable fast, low-cost Bitcoin transactions. Launched in its 2.0 version in March 2025, Flash is at the forefront of driving Bitcoin adoption in e-commerce.

About Bitcoin Only Brewery

Bitcoin Only Brewery (@Drink_B0B) is a pioneering beverage company dedicated to the Bitcoin ethos, offering high-quality beers payable exclusively in Bitcoin. With a commitment to personal privacy, the brewery delivers across Europe with no-KYC requirements.

@ dfa02707:41ca50e3

Contribute to keep No Bullshit Bitcoin news going.

• The latest firmware updates for COLDCARD devices introduce two major features: COLDCARD Co-sign (CCC) and Key Teleport between two COLDCARD Q devices using QR codes and/or NFC with a website.

What's new

• COLDCARD Co-Sign: When CCC is enabled, a second seed called the Spending Policy Key (Key C) is added to the device. This seed works with the device's Main Seed and one or more additional XPUBs (Backup Keys) to form 2-of-N multisig wallets.
  • The spending policy functions like a hardware security module (HSM), enforcing rules such as magnitude and velocity limits, address whitelisting, and 2FA authentication to protect funds while maintaining flexibility and control, and is enforced each time the Spending Policy Key is used for signing.
  • When spending conditions are met, the COLDCARD signs the partially signed bitcoin transaction (PSBT) with the Main Seed and Spending Policy Key for fund access. Once configured, the Spending Policy Key is required to view or change the policy, and violations are denied without explanation.

"You can override the spending policy at any time by signing with either a Backup Key and the Main Seed or two Backup Keys, depending on the number of keys (N) in the multisig."

• A step-by-step guide for setting up CCC is available here.

• Key Teleport for Q devices allows users to securely transfer sensitive data such as seed phrases (words, xprv), secure notes and passwords, and PSBTs for multisig. It uses QR codes or NFC, along with a helper website, to ensure reliable transmission, keeping your sensitive data protected throughout the process.

  • For more technical details, see the protocol spec.

"After you sign a multisig PSBT, you have option to “Key Teleport” the PSBT file to any one of the other signers in the wallet. We already have a shared pubkey with them, so the process is simple and does not require any action on their part in advance. Plus, starting in this firmware release, COLDCARD can finalize multisig transactions, so the last signer can publish the signed transaction via PushTX (NFC tap) to get it on the blockchain directly."

• Multisig transactions are finalized when sufficiently signed. It streamlines the use of PushTX with multisig wallets.
• Signing artifacts re-export to various media. Users are now provided with the capability to export signing products, like transactions or PSBTs, to alternative media rather than the original source. For example, if a PSBT is received through a QR code, it can be signed and saved onto an SD card if needed.
• Multisig export files are signed now. Public keys are encoded as P2PKH address for all multisg signature exports. Learn more about it here.
• NFC export usability upgrade: NFC keeps exporting until CANCEL/X is pressed.
• Added Bitcoin Safe option to Export Wallet.
• 10% performance improvement in USB upload speed for large files.
• Q: Always choose the biggest possible display size for QR.

Fixes

• Do not allow change Main PIN to same value already used as Trick PIN, even if Trick PIN is hidden.
• Fix stuck progress bar under Receiving... after a USB communications failure.
• Showing derivation path in Address Explorer for root key (m) showed double slash (//).
• Can restore developer backup with custom password other than 12 words format.
• Virtual Disk auto mode ignores already signed PSBTs (with “-signed” in file name).
• Virtual Disk auto mode stuck on “Reading…” screen sometimes.
• Finalization of foreign inputs from partial signatures. Thanks Christian Uebber!
• Temporary seed from COLDCARD backup failed to load stored multisig wallets.
• Destroy Seed also removes all Trick PINs from SE2.
• Lock Down Seed requires pressing confirm key (4) to execute.
• Q only: Only BBQr is allowed to export Coldcard, Core, and pretty descriptor.

Blog Post / Archive
GitHub Repo
CCC Guide
Key Teleport site

@ b1ddb4d7:471244e7

When Sergei talks about bitcoin, he doesn’t sound like someone chasing profits or followers. He sounds like someone about to build a monastery in the ruins.

While the mainstream world chases headlines and hype, Sergei shows up in local meetups from Sacramento to Cleveland, mentors curious minds, and shares what he knows is true – hoping that, with the right spark, someone will light their own way forward.

We interviewed Sergei to trace his steps: where he started, what keeps him going, and why teaching bitcoin is far more than explaining how to set up a node – it’s about reaching the right minds before the noise consumes them. So we began where most journeys start: at the beginning.

First Steps

• So, where did it all begin for you and what made you stay curious?

I first heard about bitcoin from a friend’s book recommendation, American Kingpin, the book about Silk Road (online drug marketplace). He is still not a true bitcoiner, although I helped him secure private keys with some bitcoin.

I was really busy at the time – focused on my school curriculum, running a 7-bedroom Airbnb, and working for a standardized test prep company. Bitcoin seemed too technical for me to explore, and the pace of my work left no time for it.

After graduating, while pursuing more training, I started playing around with stocks and maximizing my savings. Passive income seemed like the path to early retirement, as per the promise of the FIRE movement (Financial Independence, Retire Early). I mostly followed the mainstream news and my mentor’s advice – he liked preferred stocks at the time.

I had some Coinbase IOUs and remember sending bitcoin within the Coinbase ledger to a couple friends. I also recall the 2018 crash; I actually saw the legendary price spike live but couldn’t benefit because my funds were stuck amidst the frenzy. I withdrew from that investment completely for some time. Thankfully, my mentor advised to keep en eye on bitcoin.

Around late 2019, I started DCA-ing cautiously. Additionally, my friend and I were discussing famous billionaires, and how there was no curriculum for becoming a billionaire. So, I typed “billionaires” into my podcast app, and landed on We Study Billionaires podcast.

That’s where I kept hearing Preston Pysh mention bitcoin, before splitting into his own podcast series, Bitcoin Fundamentals. I didn’t understand most of the terminology of stocks, bonds, etc, yet I kept listening and trying to absorb it thru repetition. Today, I realize all that financial talk was mostly noise.

When people ask me for a technical explanation of fiat, I say: it’s all made up, just like the fiat price of bitcoin! Starting in 2020, during the so-called pandemic, I dove deeper. I religiously read Bitcoin Magazine, scrolled thru Bitcoin Twitter, and joined Simply Bitcoin Telegram group back when DarthCoin was an admin.

DarthCoin was my favorite bitcoiner – experienced, knowledgeable, and unapologetic. Watching him shift from rage to kindness, from passion to despair, gave me a glimpse at what a true educator’s journey would look like.

The struggle isn’t about adoption at scale anymore. It’s about reaching the few who are willing to study, take risks, and stay out of fiat traps. The vast majority won’t follow that example – not yet at least… if I start telling others the requirements for true freedom and prosperity, they would certainly say “Hell no!”

• At what point did you start teaching others, and why?

After college, I helped teach at a standardized test preparation company, and mentored some students one-on-one. I even tried working at a kindergarten briefly, but left quickly; Babysitting is not teaching.

What I discovered is that those who will succeed don’t really need my help – they would succeed with or without me, because they already have the inner drive.

Once you realize your people are perishing for lack of knowledge, the only rational thing to do is help raise their level of knowledge and understanding. That’s the Great Work.

I sometimes imagine myself as a political prisoner. If that were to happen, I’d probably start teaching fellow prisoners, doctors, janitors, even guards. In a way we already live in an open-air prison, So what else is there to do but teach, organize, and conspire to dismantle the Matrix?

Building on Bitcoin

• You hosted some in-person meetups in Sacramento. What did you learn from those?

My first presentation was on MultiSig storage with SeedSigner, and submarine swaps through Boltz.exchange.

I realized quickly that I had overestimated the group’s technical background. Even the meetup organizer, a financial advisor, asked, “How is anyone supposed to follow these steps?” I responded that reading was required… He decided that Unchained is an easier way.

At a crypto meetup, I gave a much simpler talk, outlining how bitcoin will save the world, based on a DarthCoin’s guide. Only one person stuck around to ask questions – a man who seemed a little out there, and did not really seem to get the message beyond the strength of cryptographic security of bitcoin.

Again, I overestimated the audience’s readiness. That forced me to rethink my strategy. People are extremely early and reluctant to study.

• Now in Ohio, you hold sessions via the Orange Pill App. What’s changed?

My new motto is: educate the educators. The corollary is: don’t orange-pill stupid normies (as DarthCoin puts it).

I’ve shifted to small, technical sessions in order to raise a few solid guardians of this esoteric knowledge who really get it and can carry it forward.

The youngest attendee at one of my sessions is a newborn baby – he mostly sleeps, but maybe he still absorbs some of the educational vibes.

• How do local groups like Sactown and Cleveland Bitcoiners influence your work?

Every meetup reflects its local culture. Sacramento and Bay Area Bitcoiners, for example, do camping trips – once we camped through a desert storm, shielding our burgers from sand while others went to shoot guns.

Cleveland Bitcoiners are different. They amass large gatherings. They recently threw a 100k party. They do a bit more community outreach. Some are curious about the esoteric topics such as jurisdiction, spirituality, and healthful living.

I have no permanent allegiance to any state, race, or group. I go where I can teach and learn. I anticipate that in my next phase, I’ll meet Bitcoiners so advanced that I’ll have to give up my fiat job and focus full-time on serious projects where real health and wealth are on the line.

Hopefully, I’ll be ready. I believe the universe always challenges you exactly to your limit – no less, no more.

• What do people struggle with the most when it comes to technical education?

The biggest struggle isn’t technical – it’s a lack of deep curiosity. People ask “how” and “what” – how do I set up a node, what should one do with the lightning channels? But very few ask “why?”

Why does on-chain bitcoin not contribute to the circular economy? Why is it essential to run Lightning? Why did humanity fall into mental enslavement in the first place?

I’d rather teach two-year-olds who constantly ask “why” than adults who ask how to flip a profit. What worries me most is that most two-year-olds will grow up asking state-funded AI bots for answers and live according to its recommendations.

• One Cleveland Bitcoiner shows up at gold bug meetups. How valuable is face-to-face education?

I don’t think the older generation is going to reverse the current human condition. Most of them have been under mind control for too long, and they just don’t have the attention span to study and change their ways.

They’re better off stacking gold and helping fund their grandkids’ education. If I were to focus on a demographic, I’d go for teenagers – high school age – because by college, the indoctrination is usually too strong, and they’re chasing fiat mastery.

As for the gold bug meetup? Perhaps one day I will show up with a ukulele to sing some bitcoin-themed songs. Seniors love such entertainment.

• How do you choose what to focus on in your sessions, especially for different types of learners?

I don’t come in with a rigid agenda. I’ve collected a massive library of resources over the years and never stopped reading. My browser tab and folder count are exploding.

At the meetup, people share questions or topics they’re curious about, then I take that home, do my homework, and bring back a session based on those themes. I give them the key takeaways, plus where to dive deeper.

Most people won’t – or can’t – study the way I do, and I expect attendees to put in the work. I suspect that it’s more important to reach those who want to learn but don’t know how, the so-called nescient (not knowing), rather than the ignorant.

There are way too many ignorant bitcoiners, so my mission is to find those who are curious what’s beyond the facade of fake reality and superficial promises.

That naturally means that fewer people show up, and that’s fine. I’m not here for the crowds; I’m here to educate the educators. One bitcoiner who came decided to branch off into self-custody sessions and that’s awesome. Personally, I’m much more focused on Lightning.

I want to see broader adoption of tools like auth, sign-message, NWC, and LSPs. Next month, I’m going deep into eCash solutions, because let’s face it – most newcomers won’t be able to afford their own UTXO or open a lightning channel; additionally, it has to be fun and easy for them to transact sats, otherwise they won’t do it. Additionally, they’ll need to rely on