Damus
brito profile picture
brito
@brito

I'm writing XPRS for off-grid conversations without internet

Relays (18)
  • wss://nostr-relay.wlvs.space – read & write
  • wss://nos.lol – read & write
  • wss://nostr.zebedee.cloud – read & write
  • wss://at.nostrworks.com – read & write
  • wss://offchain.pub – read & write
  • wss://eden.nostr.land – read & write
  • wss://relay.snort.social – read & write
  • wss://relay.damus.io – read & write
  • wss://relay.current.fyi – read & write
  • wss://relay.codl.co – read & write
  • wss://nostr.v0l.io – read & write
  • wss://nostr.fmt.wiz.biz – read & write
  • wss://relay.nostr.bg – read & write
  • wss://nostr.orangepill.dev – read & write
  • wss://nostr.oxtr.dev – read & write
  • wss://nostr.zbd.gg – read & write
  • wss://relay.nostrcheck.me – read & write
  • wss://relay.nostr.band – read & write

Recent Notes

Roger · 10h
A signed Nostr event spends more bytes on crypto than most notes spend on words: the pubkey and the Schnorr signature together dwarf a one-line message, and hex-in-JSON doubles them once more. Add rel...
brito profile picture
Thank you for the feedback, that was taken into consideration. Including some techniques such as only advertising the npub on intervals rather than including on the notes. At some point we even use a different signing format when space is tight, you can read the whole spec on https://xprs.dev

Instead of json, a tag value format is used and since this is a child from APRS, signing is not mandatory albeit it will of course be signalled as non verified on the receiver side.
seeker · 16h
I'm sadly not able to make it to Portugal, where can i find the plans to build one of these bad boys?
brito profile picture
You're the first to ask. The ones on the pic are ESP32-C3 which you can already order. The firmware you find here: https://xprs.dev/firmware/#esp32c3-mini

I'll later make available the 3D printed shell. My recommendation is that you wait until end of month because we'll be battle testing the firmware and improving more.

There is a telegram group where you can follow what happens: https://t.me/xprs_network
τέχνη · 1d
What are those standalone devices? How do you use them?
brito profile picture
These are emergency communication stations with plenty of digital features.

Power one at home and you get a hotspot with web chat (NOSTR extensions supported) to leave messages on the public room or private messages to someone. It is a mesh device so it will automatically mesh with other XPRS stations it can listen.

Then it has bluetooth and those with the XPRS app on their phones can use right away without pairing. When it has Internet access then it will use reticulum to connect with others around the web.

Just like APRS, when you are heard by a station on the woods over radio or whatever then that station in case it is connected to further links (e.g. satellite or internet) then it will announce that it is hearing you and will bridge messages from those far away links to you.

NOSTR based, so you already know how versatile notes can get.
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seeker · 16h
I'm sadly not able to make it to Portugal, where can i find the plans to build one of these bad boys?
brito profile picture
50 XPRS stations to be offered during the SemRede festival in Coimbra. These stations use NOSTR for messages and identity, albeit slightly reduced in size per message because each byte matters when transmitting on radio and satellites.

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τέχνη · 1d
What are those standalone devices? How do you use them?
Roger · 10h
A signed Nostr event spends more bytes on crypto than most notes spend on words: the pubkey and the Schnorr signature together dwarf a one-line message, and hex-in-JSON doubles them once more. Add relay hints and a full p-tag list and the envelope can outweigh the sentence several times over. If XPR...
nostrich · 3d
Huh? I don't advise people to use a hardware wallet, let alone a ledger device. I am just saying that your reasoning is not the most secure and it seems insincere as you talk about a paper wallet like...
brito profile picture
Which wallet do you know that needs to be online for generating private keys?

That is invariably generated locally just like NOSTR keys here. If you mean disconnecting the computer from the internet when generating keys, that would be superstition and the same type of people that buy hardware wallets because somehow they are uncapable of keeping their phones clean or at the very least a second phone just for the large wallets.

There is really no replacement for a brain. Dumb people will always be dumb.
nostrich · 2d
Agree that it is stupid to disconnect a computer from the internet to generate keys. Security wise it would make no difference if the computer was offline and connected later on. But if you create it offline, sign offline and stay offline then the attack surface is much smaller. I believe that eve...
kyle-moore · 3d
It says 6 tho?
brito profile picture
The listings with those fedcoins are just for exchanging them for Monero or obvious glowing purchases that few ever take the bait.

It is kind of healthy, like a filter for intelligence. On this case to measure of much the intelligence agencies are participating there because until this day and age they remain fully unable to hear or even type M.o.n.e.r.o. on their keyboards.

Similar to here, just look at any glowie promoting fedcoins and try to figure what they do for a salary.
Laeserin · 3d
Because it is, if you add together their brands and models: VW, Seat, Skoda, Cupra, Porsche, Audi, Bentley, and Lamborghini.
brito profile picture
That says very little for the technology itself. Audi has been restricted from even deploying the auto-parking feature in Germany since almost a decade, Porsche is unable to have decent autonomies, VW is over-inflated and nobody wants to pay 70k for a van. Skoda is doing well, Cupra is quite the surprise even as they reuse what was already there for ID.3 and make available a better package.

Yet, IMHO a Tesla is still far ahead in features, range and even pricing. That is visible when driving either of them for a while.
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Laeserin · 3d
Because it is, if you add together their brands and models: VW, Seat, Skoda, Cupra, Porsche, Audi, Bentley, and Lamborghini.