Franck

news

nostr

Hey stackers! ₿

A few days ago I launched **matcher.news**, a minimalist news reader with Tinder-style swipe to quickly filter headlines before diving in. It started with custom RSS and pre-built portals like /bitcoin, /chile, /argentina, /mendoza, and now...

**It supports Nostr long-form notes!** (kind 30023 / NIP-23)On the home or directly at matcher.news/nostr (or add it as a custom feed) you get a global stream of long-form/independent articles from the last 72 hours. Uncensored voices, clean markdown, pulled straight from relays – perfect for reading essays, blogs, or deep dives from the Bitcoin/Nostr community without doomscrolling.

The best part:

* Quick swipe to decide if it's worth your time (like → open the full note, skip → next).
* PWA installable (mobile/desktop), no ads, no paywalls, no weird limits.
* Blends perfectly with existing RSS crypto/regional feeds + now Nostr long-form.
* You can share notes directly from the app (if you're on Nostr, give it a try).

Quick example: just opened [matcher.news/nostr](https://matcher.news/nostr) and saw fresh posts on NIP-23 and more – all swipeable and no corporate algorithm.

**What do you think?** Useful for following long-form without leaving a simple reader? What would you add? (direct zaps on cards, more custom relays, light AI summaries, or portals like /nostr-zaps or /highlighter)?

Give it a spin and zap some feedback if you like it: [https://matcher.news/nostr](https://matcher.news/nostr)

Thanks for reading and stack sats!

@nostr
@bitcoin
@nostrdev 

#nostr #bitcoin #rss #indie #longform #nip23

Matcher.news now supports Nostr long-form notes  – Decentralized articles!

nicosaporiti

bitcoin_beginners

Bitcoin Apps Ecosystem 26.02.15

R4DENT0R

culture

![david bowie initial sketch](https://m.stacker.news/130600)


![grey values](https://m.stacker.news/130616)


![david bowie final](https://m.stacker.news/130611)

*calligraphy pens*

![reference](https://m.stacker.news/130613)


*reference*

---

https://www.youtube.com/watch?v=ELUQgRjuF8E

David Bowie — A Painting Progression

bitcoingraffiti

gaming

tech

podcasts

privacy

![](https://m.stacker.news/130555)

I have been building [Mochi](https://mochi-pay.com) and I need to tell you why.

I'm a creator. I've used Patreon, Ko-fi, Gumroad. The tools are great honestly. Subscription tiers, digital sales, tip pages. They figured out what creators need. But I'm also a bitcoiner and every time I connected Stripe, handed over my ID, and watched 10 to 15 percent vanish into the hands of people who didn't create anything, it felt wrong. And the whole time knowing that if someone at one of these companies doesn't like your content, your income is gone overnight. Your subscribers? Not yours. Your revenue? At their mercy.

I kept waiting for someone to build this on Lightning. From my findings... nobody did. So I built it myself.
Mochi gives every creator a public page. Anyone with a Lightning wallet can tip you by scanning a QR code, no account needed, no friction. When someone wants to subscribe or buy something you made, they load sats into their Mochi wallet, a prepaid balance that keeps subscriptions running without expired cards or chargebacks or banks in the way. You log in with a seed phrase. No email, no KYC.
Tips from anyone on earth. Digital product sales. Subscription tiers with gated content. One page. All sats. All yours.

Looking for our first 100 founding creators. Founders get a permanently lower tx fee locked in forever and a badge on their page. If you love the tools but love bitcoin more, come build this with me.
I want to hear from creators and supporters. What's missing? What would make you leave the old platforms behind? Let me know if you like it, or if it sucks. I'd rather hear it now than build the wrong thing.

Follow me on Nostr for updates:
npub1824j5du9uqfwk3x2s8gmj49g26cnawpgvlyyedz5grfpn9lw5ltsefua2h

I'd be happy to chat!

[mochi-pay.com](https://mochi-pay.com)

The Creator Platform That Lightning Has Been Missing

anon

An interesting nostr swiss knfe with some usefull tools. All in one!
- Key Generator
- Event Creator
- Republisher
- Verifier
- Fetcher

Key Generator & Converter
Generate keypairs and instant universal Nostr converter to instantly convert between hex and bech32 formats, npub, nsec, note, nprofile, nevent, and naddr...

Nostr Tools - Essential Utilities for the Nostr Protocol

supratic

science

The Map of Mathematics

co574

tutorials

i found an easy-to-use Telegram bot for LN wallets with NWC connection string. 
the following is a quick narrated demonstration of wallet connection & usage with CoinOS. 

source: [Zap_Gram_bot](https://github.com/mozharov/zapgram)

1) go to Telegram: https://t.me/zap_gram_bot

2) type "**/start**." click "**Settings**." click "**Connect a wallet via NWC**." 

![](https://m.stacker.news/79989)

![](https://m.stacker.news/79990)

![](https://m.stacker.news/79991)

3) get ur NWC connection string (nostr+walletconnect://XXX...). CoinOS is used as an example here. 
paste the string into the Telegram bot. 

![](https://m.stacker.news/80008)

4) receive some sats via **ZapGram bot** or **NWC**. 

![](https://m.stacker.news/79993)

![](https://m.stacker.news/79995)

![](https://m.stacker.news/79996)

OR

![](https://m.stacker.news/79997)

![](https://m.stacker.news/80003)

sats can be zapped to a Telegram user with a ZapGram account or to an LN invoice. 
sats can be zapped from a ZapGram balance or from a NWC-connected external wallet. 

![](https://m.stacker.news/80004)

=====================
additional information and commands: 

![](https://m.stacker.news/80006)

![](https://m.stacker.news/80007)

=====================
Happy zapping ⚡️! 

it's amazing how quickly new tools can get put-together with the plethora of building blocks available. 

this reminds me of how various Linux OS versions were built with pieces of GNU [presentation by Richard Stallman](https://www.youtube.com/watch?v=E6LsfnBmdnk&list=PLC2233C191A464B26). 

anyways, this was my first bitcoin guide, hurray! 🎉

ZapGram bot: new Bitcoin Lightning Wallet on Telegram

SHA256man

hyperlinks

Open Source Alternatives

Jon_Hodl

A bunch of material to study.
Some links could not work, but many of these articles and videos could open your eyes about the world you are living in.
Yes, some info there is not well explained or goes to bullshit. Select the important information from garbage.
Knowledge is power, ignorance is a bliss.

Educated in Law – Challenge jurisdiction

DarthCoin

bitcoin

I built Matcher.News / Bitcoin to make staying on top of BTC simpler:

All major sources, one feed (no tab-hopping)

Search-based streams for specific topics (ETF, mining, Lightning, ordinals, regulation, price, etc.)

Substack support so you can follow the writers you actually trust

A swipe UI: skip the noise, like what matters, and keep a read-later list

Cleaner reading: less clutter, fewer distractions

Try it here: https://matcher.news/bitcoin

If you’re a bitcoiner: what sources or searches should I add next?

All Bitcoin news in one place — swipe, save, and read a clean feed.

Bitcoin Apps Ecosystem 26.02.08

lightning

It's a simple concept: it generates nonstop music and people can vote for the genre and topic by sending a small bitcoin lightning payment. You can choose the amount yourself, the next genre and topic is chosen via weighted random selection based on how many sats it has received.

a LN Jukebox: lighting-powered AI radio

06bc1a977d

There's an option to make you posts look fancy since this stackerNews release - https://stacker.news/items/711964

$$
\sum_{i=0}^{32} 210'000*[\frac{50}{2^i}]
$$

We have an option but there's no cheatsheet with basic formulas and how to embed these formulas to our items until today.

## Use double $ sign to start and finish your formula
```
$$
a+b=b+a
$$
```

$$
a+b=b+a
$$

## Powers and indexes
```
a^{b};
a_{b};
a_{b}^{c}
```

$$
a^{b};
a_{b};
a_{b}^{c}
$$

## Fractions
```
\frac{a}{b};
\frac{1}{x+1}
```

$$
\frac{a}{b};
\frac{1}{x+1}
$$

## Square roots
```
\sqrt{x};
\sqrt{a+b};
\sqrt[n]{x}
```

$$
\sqrt{x};
\sqrt{a+b};
\sqrt[n]{x}
$$

## Basic operators and brackets
```
+ - * = \neq < > \le \ge (a) [b] \{c\}
```

$$
+ - * = \neq < > \le \ge (a) [b] \{c\}
$$

## Summation and integrals
```
\sum_{i=1}^{n} i;
\int_0^1 x \, dx
```

$$
\sum_{i=1}^{n} i;
\int_0^1 x \, dx
$$

With  all of these basic formulas we can create complex formulas, and if it's not enough for you you can study KaTeX library in details on their website - https://katex.org/

How to embed math formulas to stackerNews post

030e0dca83

A really nice structured course about Zeus app, Bitcoin and Lightning Network in general.
How to setup Zeus app, functionalities, features, usage, channels etc and some other basic terms about Bitcoin and LN.
After each section you are invited to do a quiz. 
Really good quiz ! Very good educational material!

Course & Quiz - Zeus Lightning Wallet | Math Academy

A Bitcoin news platform dedicated to the African continent. No shitcoinery!

hasherstacker

Bitcoin Apps Ecosystem 26.02.01

PostAmmo - Viral Content Idea Generator (mobile, PWA, extension)

riot_coder

Timeseed v2: local-first encryption with deterministic, time-based keys (no servers, no apps)

Body

Encryption today mostly means trusting apps, update pipelines, and centralized infrastructure. Even “end-to-end” systems still depend on vendors, app stores, and forced updates.

Timeseed v2 is an attempt to remove that dependency entirely.

It’s a lightweight, open-source, client-side encryption tool that runs as a standalone HTML file (online or fully offline, air-gapped if you want). No accounts, no servers, no key exchange.

Instead of contacts and key servers, Timeseed uses deterministic time-based key derivation:

Generate a high-entropy TimeSeed root

Optionally add a secret pepper

Derive reproducible passkeys scoped to daily, monthly, or long-term periods

Rotate keys simply by advancing the date — no coordination required

Crypto stack:

Argon2id (memory-hard KDF)

AES-GCM (authenticated encryption)

Per-operation random salts and IVs

All encryption happens locally before any network touch

You can share a TimeSeed publicly if it’s pepper-protected, or keep everything private. Re-keying is trivial. No identifiers tied to phone numbers, emails, or IPs.

Timeseed v2 also includes LockIt, a companion encrypt/decrypt tool for text and files using derived passkeys — useful on desktop or mobile in constrained situations.

This isn’t a messaging app. It’s pre-network encryption you control.

If you believe sovereignty means owning your keys and your tooling, this may be useful.

Online demo + offline HTML download

Open source

No tokens, no accounts, no telemetry

👉 https://timeseed.io

Timeseed v.2 - Local, time-based KDF + encryption

avbpod

Howdy Stacker! 

Today we will have a look on Bitchat. Bitchat emerged from a rapid prototyping effort where jack developed the initial concept [during a weekend coding session](https://nitter.net/jack/status/1941989435962212728#m). @calle joined the project shortly afterward to co-develop the Android implementation. Currently, jack leads iOS development while @calle the Android version.

![](https://m.stacker.news/121073)

## Introduction: Chat Freely, Without the Grid

Imagine sending messages when the internet goes down, during a natural disaster, or in places where communication is restricted. Bitchat makes this possible. It’s a decentralized, peer-to-peer messaging app that skips central servers, letting devices talk directly to each other, entirely offline using Bluetooth and mesh networking. Designed with privacy and resilience in mind, Bitchat is ideal for use in areas where traditional connectivity is unreliable or unavailable—such as during disaster scenarios, in remote locations, or for those looking to avoid surveillance. At its core, Bitchat uses cryptography to ensure every message is end-to-end encrypted, verified, and tamper-proof.

In this tutorial, we’ll show how Bitchat works and how you can use it for truly private, offline-ready communication.

## 🚀 Key Features

Bitchat enables offline messaging through these [features](https://github.com/permissionlesstech/bitchat-android?tab=readme-ov-file#features):

- **Cross-Platform Compatible**: Full protocol compatibility between iOS and Android.
- **Decentralized Mesh Network**: Automatic peer discovery and multi-hop message relay over Bluetooth Low Energy (BLE)
- **End-to-End Encryption**: X25519 key exchange + AES-256-GCM for private messages
- **Channel-Based Chats**: Topic-based group messaging with optional password protection
- **Store & Forward**: Messages cached for offline peers and delivered when they reconnect
- **Privacy First**: No accounts, no phone numbers, no persistent identifiers
- **IRC-Style Commands**: Familiar `/join, /msg, /who` style interface.
- **Message Retention**: Optional channel-wide message saving controlled by channel owners
- **Emergency Wipe**: Triple-tap logo to instantly clear all data
- **Modern Android UI**: Jetpack Compose with Material Design 3
- **Dark/Light Themes**: Terminal-inspired aesthetic matching iOS version
- **Battery Optimization**: Adaptive scanning and power management

## 1️⃣ How Bitchat Works - simply

Bitchat lets you message nearby phones directly via BLE, with no internet or cell signal needed. When you start a chat, the phones perform a secure handshake to create a unique, temporary encryption key for your conversation. Every message is protected with end-to-end encryption, and a new key is used for each one to ensure past messages remain safe even if your phone is compromised later. Finally, the app splits messages into small pieces and mixes them with random dummy data to hide your messaging activity. For direct device-to-device chats, it only works within a range of up to ~100m. It's like passing encrypted notes in a crowded room—devices whisper directly to each other, shredding the keys after every message.

Bitchat also allows you to join location-based chat rooms using the Nostr protocol and `#geohashes`. A geohash is a short code, like `#u33d`, that represents a specific geographic area, from a single neighborhood, up to an entire city or region. You can `teleport` into any geohash chat room around the world simply by entering its tag. Your messages are sent through a decentralized network of relays, which protects your exact location. Furthermore, each time you join a geohash room, you are given a new, temporary identity, adding an extra layer of privacy to your location-based conversations.

For more accurate technical details, please refer to the [official Whitepaper](https://github.com/permissionlesstech/bitchat/blob/main/WHITEPAPER.md).

## 2️⃣ Installation & Setup

### Where to Get Bitchat

You can install Bitchat through:

- [Apple ](https://apps.apple.com/us/app/bitchat-mesh/id6748219622)[App Store](https://apps.apple.com/us/app/bitchat-mesh/id6748219622)[ ](https://apps.apple.com/us/app/bitchat-mesh/id6748219622)(for iOS devices)
- [Google Play Store](https://play.google.com/store/apps/details?id=com.bitchat.droid) (for Android devices)

Android users also have alternative options:

- Download the APK directly from [GitHub Releases](https://github.com/permissionlesstech/bitchat-android/releases) page or
- Install through the Nostr-compatible [Zapstore](https://zapstore.dev/apps/naddr1qvzqqqr7pvpzq7xwd748yfjrsu5yuerm56fcn9tntmyv04w95etn0e23xrczvvraqqgkxmmd9e3xjarrdpshgtnywfhkjeqxtfkcr)

![](https://m.stacker.news/121074)

*Note: This tutorial focuses primarily on the Android implementation. The iOS version may differ.*

### Setup Process

After installation, open Bitchat to see this initial permissions screen. Here's what you need to do:

1. **Grant these required permissions:**
  - **Bluetooth access** (to discover nearby Bitchat users)
  - **Precise location** (Android requires this for Bluetooth functionality)
  - **Notifications** (to receive private message alerts)
2. **Disable battery optimization**:
  - This allows Bitchat to run in the background
  - Maintains mesh network connections continuously

Tap on `Grant Permissions` , follow the `prompts` and `Disable Battery Optimization` to move to the next screen.

![](https://m.stacker.news/121075)

Welcome to Bitchat's main screen. Let's get oriented:

### Settings

First things first. The settings menu can be opened by tapping the `Bitchat logo`. The following options are available:

- Set the `appearance` (system/light/dark).
- enable `Proof of work` to geohash for spam deterrence (optional)
- Turn on `Tor` to enhance privacy.

![](https://m.stacker.news/121076)

### Set Your Identity

Tap the `bitchat/anonXXXX` field at the top to choose your username. This is how others will see you in both Bluetooth and internet modes. For example, you could change "anon2022" to a username of your choice.

![](https://m.stacker.news/121077)

### Select Network Channels

Use the `#location channels` menu (right of username) to switch between connection types:

- **BLE Mesh**: Default Bluetooth mode (no internet, ~10 - 50m range)
- **#geohashes**: Internet-enabled geographic communities using [Nostr protocol](https://nostr.com/)

When you select #geohashes mode, Bitchat integrates with the Nostr protocol to enable geographic communities. Your messages are published to `decentralized Nostr relays` rather than Bitchat's peer-to-peer network, allowing broader but location-filtered conversations. Crucially, your Bitchat identity keys cryptographically sign all Nostr events to maintain authentication, while geohash tags (like `#u4pruyd` for a neighborhood) filter messages to your chosen precision level. This means you can participate in local discussions without revealing exact coordinates, though internet access is required.

![](https://m.stacker.news/121078)

### Monitor Peers

The peer counter shows users:

- Nearby (BLE Mesh) or
- In your geohash zone (#geohashes)

![](https://m.stacker.news/121079)

## 3️⃣ Global Chat & Private Messages

Bitchat provides two distinct communication modes to suit different needs:

- **Public Channels:** For open conversations with others. You can connect either through the local BLE mesh network for nearby users or via a global #geohash for internet-enabled, location-based communities.
- **Private Messages:** For secure, one-on-one conversations. These establish a direct, encrypted connection to keep your exchanges confidential.

Understanding both modes will help you navigate your conversations.

### Public Channels: The Community Hub

The `#location channels` menu (top-right) controls your public visibility. Selecting `mesh` connects you to all nearby users via BLE mesh - typically devices within 10-50 meters. This creates an open forum where messages broadcast to everyone in range, ideal for event announcements or local alerts.

For broader geographic reach, choose any `#geohash` tag to join internet-powered communities filtered by location. These channels use Nostr protocol relays, allowing communication across cities or regions while maintaining location-based relevance. Your messages appear live to others in the same channel, with new participants automatically seeing recent message history upon joining.

![](https://m.stacker.news/121082)

### Private conversations: Secure & Encrypted

To start a private conversation, single-tap directly on any `username` displayed in `Peers Overview.` You can also tap on the `star icon` to mark this user as a favorite, which will keep them visible in your contact list even when they are offline.

![](https://m.stacker.news/121083)

Bitchat automatically initiates its `security handshake` when you start a private chat. Devices exchange ephemeral keys to create an encrypted tunnel specifically for your conversation. This process ensures that all your messages and shared files remain confidential thanks to continuous end-to-end encryption. Private messages support text and file sharing.

![](https://m.stacker.news/121084)

## 4️⃣ Additional features

You can access the actions panel instantly by typing `/` anywhere in Bitchat. This reveals a command menu for quick actions.

- **Manage connections**: `Block users` or `Unblock peers`
- **Channel controls**: `Show channels` or `Join/create channel`
- **Social interactions**: `Send warm hug`  or `slap with trout` 🎣
- **Chat maintenance**: `Clear chat messages`
- **Privacy tools**: `See who's online` or `Send private message`

Commands execute immediately - like `/block Satoshi` to silence critics or `/hug Hal` to spread positivity 🫂.

![](https://m.stacker.news/121085)

## 5️⃣ Creating a channel

Channels in Bitchat enable organized communication around topics, locations, or communities. To create your own, follow this workflow:

### Step 1: Create a channel

To create a channel, type `/j` or `/join` followed by the `channel name` in any chat (e.g.,/j <channelname>). After creation a new `icon ⧉` appears indicating the new channel. Other users can join by typing the same command (e.g. /j bitchat_tutorial).

![](https://m.stacker.news/121086)

### Step 2: Configure settings

In addition to the default commands, the following settings are available within a channel:

- `/save` to save messages locally
- `/transfer` to transfer channel ownership and
- `/pass` to change the channel password.

For private communities, this command enables password protection, requiring approved members to enter a custom password before joining.

## 6️⃣ Panic Mode

Now, let's talk about that `panic mode`…Triple-tapping the `Bitchat logo` initiates a complete wipe of all local messages and data within the app. This is your ultimate privacy safeguard, perfect for situations requiring immediate discretion.

***Important reminder:*** *Panic mode is permanent. Once activated, data cannot be recovered. Use with caution.*

![](https://m.stacker.news/121087)

## 7️⃣ Geohashes

Geohash channels enable targeted conversations based on `geographic locations` rather than traditional network connections. This feature transforms bitchat into a location-aware communication tool, ideal for local coordination, community building, and location-specific discussions.

### How #geohashes work

The system divides the world into grid squares using the [Geohash system](https://en.wikipedia.org/wiki/Geohash), where each character in the hash represents greater precision:

- **Level 4** (e.g., `u33d`): Covers approximately 25km × 25km - ideal for city-wide discussions
- **Level 6** (e.g., `u33d8z`): Covers about 1.2 km × 1.2 km - neighborhood precision
- **Level 8** (e.g., `u33d8z1k`): Covers roughly 150 m × 150 m - street-segment accuracy

Precision selection balances privacy with utility: higher levels create more exclusive zones but reveal your location more precisely.

### Joining #geohash channels

1. Access the `#location channels` menu.
2. Select your desired precision level and enter the `#geohash` (e.g. #u33d)
3. Tap the `Teleport` button to join the `#location channel`.

![](https://m.stacker.news/121088)

Alternatively, you can tap the `map icon` to use the map view to determine the precision level and tap `select` to join the `#location channel`.

![](https://m.stacker.news/121089)

***Important reminder:*** *#geohash functionality requires an active internet connection - unlike BLE mesh which operates offline via Bluetooth.*

## 8️⃣ Heatmaps

Heatmaps are a cool way to discover Bitchat events and channels around the world. [Bitmap](https://bitmap.lat/) visualises and tracks anonymous, location-based messages across the Nostr network, displaying ephemeral Nostr events. Take a look and join location-specific channels and chats.

![](https://m.stacker.news/121090)

## 🎯 Conclusion

Bitchat enables secure, decentralized communication for scenarios where traditional messaging fails. It's able to operate without internet infrastructure using BLE mesh networking, making it suitable for protests, disaster zones, and remote areas where connectivity is limited or censored. The app ensures privacy through ephemeral key encryption, geohash-based location channels, and a panic mode data erasure.

The app is still in its early stages of development, but it is already showing promise. Users should expect occasional bugs and report issues via [GitHub](https://github.com/permissionlesstech/bitchat-android/issues). Improvements are planned, including `ecash` integration for private in-app transactions using Cashu protocol.

![](https://m.stacker.news/121091)

## 📚 Bitchat Resources

[Github](https://github.com/permissionlesstech) | [Website ](https://bitchat.free/)| [Whitepaper](https://github.com/permissionlesstech/bitchat/blob/main/WHITEPAPER.md)

Getting Started | Bitchat

runningbitcoin

bitdevs

Education

BooksAndArticles

I have launched a teaching website dedicated to upgrading the Bitcoin population in math.  Check out and use the website.   Theres games, courses, and video.   Its big time beta right now but it has a lot to offer so i want it out now getting eyes on it.

Magic Internet Math Website Launch

Fundamentals