From October 1 to 3, bitcoin++ payments edition took place in Berlin: a three-day event all about Bitcoin payments. Talks and workshops covered topics including Ark, Ecash, Lightning, privacy and what it takes for merchants to accept Bitcoin. Here are our Cashu highlights from the week: In keeping with tradition,
Cashu Highlights
The second quarter of 2026 brought a lot of activity across the Cashu ecosystem. This report opens with Numo, moves through updates to Orchard, libraries, and mints, and closes with the quarter's wallet releases. Numo Numo, the Android point-of-sale app introduced in Q1, had a busy quarter both
Projects
Orchard is a self-hosted, free and open-source web application built to simplify mint management. Running a typical Cashu mint involves a full Bitcoin node, a Lightning node, and the mint service itself. Orchard connects them all into an interface to give operators a universal command center. Necessity is the Mother
Projects
For the last couple of months, we've been doing something we don't usually get to do: standing behind counters. Conferences, restaurants, actual merchants selling actual things. Instead of trying to orange pill or pitch Numo, we've been handing over the device, stepping back, and
Cashu Highlights
This recap covers developments across the Cashu ecosystem during the first quarter of 2026.
Cashu Highlights
This progress report looks at what’s been happening across the Cashu ecosystem in the fourth quarter of 2025. It starts with our NutNovember hackathon and the Bitcoin for Signal campaign, moves through updates to libraries and wallets, and wraps up with new projects, including Cashu for Community Sovereignty and
Campaigns
About a month ago we launched a campaign to generate support and discussion around integrating bitcoin into Signal. The response was strong. The #BitcoinForSignal hashtag picked up momentum and people shared it widely. The campaign is still live at bitcoinforsignal.org. The Origins The genesis of this campaign comes from
Updates and insights from the Cashu ecosystem.
In this blog post, we explore how zero-knowledge proofs enable the exchange of ecash tokens with arbitrary spending conditions (specified by a Turing-complete programming language), without sacrificing privacy. A Brief Overview of Cashu The following is a high-level introduction of the protocol, for all the nuts and bolts of the
Routstr lets you pay for AI with Bitcoin, per request, using Cashu eCash. Point your existing OpenAI-compatible client to a Routstr node, pass a token, get answers. No signups, no credit cards, no KYC. The problem (why this matters) * Gatekeepers everywhere: Access to powerful models lives behind platforms, accounts, and
Hashpool is an accountless mining pool that uses ecash to represent mining shares. Unlike existing mining pools, Hashpool cryptographically blinds the user's identity and creates a free market for trading mining shares. The Problem With Mining Pools In the earliest days of bitcoin anyone could mine on a