Hi Insiders. This is Tuma, open-source reporter from the Insider Edition.
This week’s update features the latest major release, v0.11.1, of Fedimint. This version brings a better UI for gateway management, lower memory usage, and some new experimental features
We also cover the latest movements in the BIP repository. Notably, BIP391 has been published, while a new BIP by Matt Corallo, has been assigned number 323.
We finally propose some more interesting news, such Jonas Schnelli debunking quantum FUD, an article on hashrate renting, and Numo’s battle testing at Bitcoin++ Villain Edition.
Highlights from the bitcoin developer ecosystem
I spent 10+ hours in open-source developer calls in the Bitcoin ecosystem last week. Here is what caught my eye:
v0.11.1 of Fedimint, called “Mint Condition” is out, bringing a better UI for gateway management, lower memory usage, and some new experimental features.
During the weekly call, on Monday 20th, Fedimint developers discussed the recent release of v0.11.0 and the need for a patch version due to a panic happening during database migration. The patch version was later released on Tuesday 21st.
The new version comes with a better UI for gateway operators, including BOLT12 send and receive, channel management, and payment filtering, it adds better observability through Prometheus, it reduces memory usage, and allows users to discover guardians through the decentralized Pkarr DNS sysyem.
v0.11.x also adds new experimental APIs for the new v2 version of the wallet and the mint. These modules are disabled by default, and must be explicitly activated during the federation setup. Devs specify that these features are not yet production-ready and their use is still not recommended.
A BIPs Update
In the last days there was some movement in the BIP repository. Specifically, one new BIP has been published and one BIP has been assigned a number by BIP maintainer Murchandamus.
Published BIPs
A list of recently published BIPs
BIP391: Binary Output Descriptors
Authors: SeedHammer
Published On: Apr 23rd 2026
Layer: Applications
BIP391 proposes a new, efficient container format to encode an output descriptor, with support for key metadata, based on key-value maps as defined by BIP174. The aim is to provide a standard to address the issues of descriptor strings, such as the lack of machine-recognizable header, inability to represent metadata, and inefficient keys encoding. The specified Binary Output Descriptor (BOD) format consists of a fixed header, a key-value map describing the output descriptor, and a key-value map for each key.
Numbered BIPs
A list of BIPs that recently got assigned a number
BIP323: 24 nVersion bits for general purpose use
Authors: Matt Corallo
Assigned On: Apr 22nd, 2026
Layer: Applications
PR2116 introduces BIP323, which aims to increase the number of bits reserved for nonce space in the nVersion field of the block header from 16 to 24. This avoids the nTime field to be used as extra nonce space by header-only miners.
Other News from the Bitcoin World
Breaking Quantum FUD: Former Bitcoin Core maintainer Jonas Schnelli debunked the recent news about 15-bit ECC key being broken by a quantum computer.
Renting hashrate: An interesting article about renting hashrate and pointing it towards Ocean mining pool using their Datum gateway.
Battle tested: Numo, the open-source, Cashu-based Point-of-Sale (POS) application, has been battle tested during Bitcoin++ Villain Edition. Open-source designer Erik provides a precise analysis of his findings on how to improve the user experience for merchants.