A new open-source project has created infrastructure that will enable users to send Bitcoin transactions without internet access.
Called Darkwire and submitted to the official hackathon of Bitcoin 2025, The Open Source Project uses long-distance radio and is designed to make off-grid communication possible.
It was conceived and designed by pseudonymous programmer ‘Cyber’ Who currently strives for a degree in artificial intelligence and machine learning.
Talk with DecryptCyber explained that Darkwire can be necessary or desirable in situations in which traditional communication infrastructure, such as internet, power grid or cellular networks, is “not available or controlled”.
Cyber gave the example of “censored or politically sensitive regions” such as the Rafah Crossing or Indo-Tibetan border, as well as disaster areas where infrastructure has been destroyed or taken offline.
‘[darkwire is for] People who are looking for privacy or who want to circumvent their communication and transactions, “they said, adding that the framework is not for more casual bitcoiners.
“Imagine that it is related to Tor, but for this specific use case,” they add. “Although Bitcoin is (somewhat) private, it fails when governments and regimes easily cut off your internet supply, Darkwire wants to solve this specific problem.”
In terms of how Darkwire actually works, Cyber explains that the Long Range Radio (Lora) framework uses to create a decentralized mesh network, allowing devices to send small packages of data, such as SMS messages or Bitcoin transactions, about distances of different kilometers or satellites.
“At least one node in the network must be connected to the internet, so that the transaction to the blockchain can be pushed for miners to verify it,” Cyber said.
From junction to junction
Apart from long-distance radio insurers, Darkwire also uses microcontrollers, such as Ardoino Uno, to form a mesh network-a decentralized network in which multiple nodes are connected to several other nodes, without a centralized access point.
“When a user wants to send a Bitcoin transaction using the Darkwire GUI, he gives up the receiver address and amount with a local wallet managed by Bitcoinlib (a Python library),” Cyber said.
After this has been done, the Darkwire graphic user interface generates a signed RAW Bitcoin transaction in hexadecimal layout, whereby the unprocessed transaction -hex is then sent from the computer (via a serial connection such as USB), to a Darkwire button (a combined microcontroller and Lora machine).
They add: “The Darkwire node takes this transaction data, fragments in smaller packages if necessary and sends it wirelessly using Lora.”
In ideal conditions, every Darkkwire node has a range of 10 km with a direct face line, although the range would be between 3 km and 5 km in more densely populated environments.
“In the MESH network, other Darkwire nodes receive these packages and pass them on, jump from junction to node,” continues Cyber, adding that this process continues until the transaction data reaches a designated Darkwire node that has internet access.
“This junction connected on the internet acts as a starting point, the broadcast of the collected and verified unprocessed Bitcoin transaction on the Global Bitcoin network, where it can then be included in a block,” they say.
Just the beginning
Darkwire is currently in an entry The Bitcoin 2025 Official HackathonBut Cyber wants to further develop the project, to refine it in an adult open-source platform and make the “the industrial stand” in Lora-based Comms.
“This can clearly not only be done by me, so I would also appreciate open source,” said Cyber.
The programmer also noted that they still have to implement different Darkwire functions, such as the UTXO storage for messages, coding for messages and also uploading to NOSTR (an open-source protocol for sending messages).
And given the fact that Darkwire is still a work in progress, cyber acknowledges that it currently has some limitations that can be resolved over time.
This includes the relatively low bandwidth of Lora Radio and the sensitivity of Lora to obstacles of terrain, as well as the dependence on dark nodes of internet outlets that can become failure points.
But over time, as Darkwire Networks grow, such restrictions must be considerably improved, offering Bitcoin users in less favorable environments to send transactions to Bitcoin validators elsewhere in the world.
And at a time when the world is becoming more and more authoritarian and undemocraticDarkwire can ultimately become an essential tool in the continuous use and growth of Bitcoin.
“I really hope that people who live in any form of authoritarian regimes and Staten can use Darkwire and bring the truth out of it,” Cyber said.
Edited by Sebastian Sinclair