Francisco Calderón 🫓⚡

Software engineer, FOSS, Bitcoin supporter and troublemaker

🤖 @lnp2pBot / 🧌 @mostroP2P builder.

Cypherpunks write code.

nostr: [email protected]

[Francisco Calderón 🫓⚡ @negrunch]

This was the Lightning Hackday, a #Bitcoin party we celebrated in Buenos Aires.

It would not have been possible without the effort from @BitcoinAR and our sponsors @FulgurVentures @GaloyMoney

Soon we will upload the talks on youtube, stay tuned

#LightningHackdayBA

[Mostro @MostroP2P]

Mostro 🧌 was built around a simple question.

Why do you need to ask someone's permission to buy or sell bitcoin?

There shouldn't be a company in the middle. No account to create, no document to submit, no approval to wait for.

Bitcoin exists so anyone can participate in the financial system on their own terms. Mostro exists to make that possible in P2P exchange.

An open protocol. Sovereign nodes. No custody. No KYC. No middlemen.

That's the vision. And it's been the same since the first commit.

https://t.co/kK3uY3neJe

[Mostro @MostroP2P]

Every new node that joins Mostro 🧌 makes the network more useful for everyone.

More operators, more available currencies, more local liquidity, more options for the end user.

The network grows when communities take control of their own infrastructure.

The next one could be your community.

Guide 👉 https://t.co/r9FrzKLF8q
Apply 👇
https://t.co/vAGAX27qGr

#Bitcoin #Nostr #P2P #Community

[Francisco Calderón 🫓⚡ @negrunch]

Si te perdiste a María Corina en el @OsloFF

https://t.co/ccC8AGXOq5

[Francisco Calderón 🫓⚡ @negrunch]

Just now @MariaCorinaYA in @OsloFF

[Martti Malmi @marttimalmi]

Hiring: Developer for Secure Communication on Nostr

Nostr — the decentralized social protocol — must become the simplest, most sovereign platform for online expression and commerce: a phone, no servers, no third-party accounts. With Cashu (Bitcoin e-cash), even offline checkout is possible. No dependency chains. No loading spinners. No failure cascades.

But sovereignty requires secure messaging. Without forward secrecy, one compromised key reveals entire message histories — orders, identities, everything. Double Ratchet (like Signal) or MLS algorithm (like Matrix) is essential. They also enhance features like friends-only sharing.

Iris is the only Nostr web client with Double Ratchet today. We're building encrypted DMs, group chats, and the whole social networking experience — the primitives of a decentralized social layer with no phone numbers, accounts, or central infrastructure. Just keys. Communicate and publish over any relay, any client — even offline via Bluetooth or Wi-Fi.

We’re hiring a developer who:
* Writes TypeScript and React
* Understands basic applied cryptography (signatures, encryption, key exchange)
* Knows algorithms, data structures, resource optimization
* Improves web app UX independently
* Bonus: Can work on-site in Helsinki

Remote OK. Contract (global) or full-time employment (Finland). DM me securely: https://t.co/rKDhUHiuvG

[Mostro @MostroP2P]

This is the Mostro's Matrix 🧌 The protocol runs. Nodes coordinate.
Sats settle on Lightning ⚡

Once you actually get it, everything else feels unnecessarily complicated.

Only Mostros get it 🧌

https://t.co/P6usvR5d8Z

#Bitcoin #Nostr #P2P #Cypherpunk

[Francisco Calderón 🫓⚡ @negrunch]

Oslo Freedom Forum

The most powerful Human Rights forum, don't miss it

#OsloFF

https://t.co/4ydRvX6g2O

[Mostro @MostroP2P]

On Mostro 🧌 the rules of a trade are defined before
it begins.

Amount. Currency. Time each party has. What happens
if someone doesn't confirm. All set by the protocol,
before the first message.

Sats are held in Lightning ⚡ until both parties fulfill
their part. The code executes. Nobody decides in between.

That's what makes the system work.

https://t.co/kK3uY3neJe

#Bitcoin #Cypherpunk #Nostr #P2P

[Mostro @MostroP2P]

Every Bitcoin community reaches a point where it needs
its own infrastructure.

A place where members can buy and sell among themselves.
With their currency. With their rules. With real local
liquidity.

The Mostro 🧌 Community Program exists for that moment.

Active communities today:
🇨🇺 Cuba
🇪🇸 Spain
🇨🇴 Colombia
🇧🇴 Bolivia
🇻🇪 Venezuela

Apply 👇
https://t.co/vAGAX27qGr

#Bitcoin #Nostr #P2P #Community

[Mostro @MostroP2P]

Sats to the other side of the world, in seconds.

Lightning has no borders. Neither does Mostro 🧌

https://t.co/P6usvR5d8Z

#Bitcoin #Lightning #P2P #NoKYC

[Francisco Calderón 🫓⚡ @negrunch]

@BtcAndres pensé que te iba a encuerar 🤣🤣🤣🤣

[Mostro @MostroP2P]

There are people who can't send money to their family because a bank decided their country is too risky.

There are people who can't open an account because they don't have the right document.

Mostro 🧌 doesn't make that distinction. The protocol accepts anyone with a Lightning wallet and internet access.

The financial infrastructure that should exist, already exists ⚡

https://t.co/kK3uY3neJe

#Bitcoin #Nostr #P2P #FinancialFreedom

[Mostro @MostroP2P]

Mostrix v0.2.0 🧌⚡

Mostro's terminal client just got its biggest update yet.

What's new in this release:

⚡ Lightning address for buyers: receive sats directly
to your ln address, no extra steps

🛡️ Anti-abuse system for disputes: bond slash active
for operators, more protection for both parties

💬 Chat migrated to protocol core: more stable
communication, aligned with the broader ecosystem

🖥️ Refreshed UI: clearer popups, better error handling
and more accurate order status displays

Get the latest version 👇
https://t.co/JA7Ryu01Oq

#Bitcoin #Lightning #Nostr #P2P #Mostro

[Mostro @MostroP2P]

Every block is proof.

Bitcoin has been mining non-stop for over 15 years.
No company enables it. No central server sustains it.
No permission keeps it alive.

Mostro 🧌 works with the same logic. The protocol runs.
Nodes coordinate. Trades settle on Lightning ⚡

Time proves what whitepapers promise.

https://t.co/kK3uY3neJe

#Bitcoin #Nostr #P2P #Cypherpunk

[Mostro @MostroP2P]

Running a Mostro 🧌 node doesn't require being a developer.

The Communities Program has a step-by-step guide and a
Telegram group where the team supports each community
through the process.

Nodes are already live in:
🇨🇺 Cuba
🇪🇸 Spain
🇨🇴 Colombia
🇧🇴 Bolivia
🇻🇪 Venezuela

Each one started from zero, with team support.

If you coordinate a Bitcoin community, the infrastructure
is available.

Guide 👉 https://t.co/r9FrzKLF8q
#Bitcoin #Nostr #P2P #Community

[Mostro @MostroP2P]

Sats in your wallet. Trade done. Zero forms.

That's what trading with real peace of mind feels like ⚡

https://t.co/P6usvR5d8Z

#Bitcoin #P2P #Nostr #Lightning

[Mostro @MostroP2P]

🧌 Mostro v0.17.4 is out.

This release adds a major set of improvements to Mostro’s bond and dispute flow: payout confirmation for the winner, solver-directed dispute slashing, concurrent taker bonds with first-to-lock wins, and a cleaner anti-abuse bond design all the way from the foundation to Phase 3.5.

We also shipped practical fixes and updates, including support for MOSTRO_NSEC_PRIVKEY for the Nostr private key, better resilience when Yadio returns null rates, created_at on AddInvoice small orders, and documentation work around multi-source price providers.

No middlemen. No KYC. Just Bitcoin, Lightning, and Nostr.

#Bitcoin #P2P #Lightning #Nostr #Mostro

https://t.co/SRGJD9fp4u

[Francisco Calderón 🫓⚡ @negrunch]

Y ese azul qué? un refrito de Vente Venezuela?

Lo que queda del chavismo ya no tiene ni identidad.

[Madelein Garcia @madeleintlSUR]

Jorge Rodríguez en Mérida en el encuentro con productores.

“No importa por quién votes y de qué ideología política seas. Lo que importa es que seas venezolano, decente, honesto para trabajar en la construcción del país”

Segunda fase de la peregrinación.

[Francisco Calderón 🫓⚡ @negrunch]

New Mostro Mobile versión 🥳

[Mostro @MostroP2P]

Mostro Mobile v1.2.7 🧌⚡
Three new things in this release:

🌎 New community node: Venezuela joins the network
🔔 Push notifications in the P2P chat, so you never miss a message mid-trade
🔧 Smarter restore error handling: the app now tells you exactly what went wrong and why

Get the latest version on GitHub and Zapstore 👇
https://t.co/xvz8HiFvuj

https://t.co/BOD3rZe41n

[Mostro @MostroP2P]

May 22nd, 2010. Laszlo paid 10,000 BTC for two pizzas.

It was the first moment Bitcoin worked as real money between two people, no banks, no middlemen.

15 years later, that idea is still the most important one in the ecosystem: Bitcoin gets used.

Mostro 🧌 exists for that. So that buying and selling bitcoin is as direct as it was always meant to be.

https://t.co/kK3uY3neJe

#BitcoinPizzaDay #Bitcoin #P2P #Mostro