Citadel Dispatch CD171: CALLE - BITCHAT AND CASHU
Jul 30, 2025
Calle, creator and lead maintainer of the Cashu open source protocol, delves into the groundbreaking world of mesh communication through his Bitchat app. He discusses how Cashu enables private and offline Bitcoin transactions, addressing real-world applications and challenges of mesh networks. Calle shares insights on the importance of decentralized communication, the technical hurdles involved in app development, and funding challenges in the open-source ecosystem. His vision for future app development and community engagement offers a fascinating glimpse into the potential of technology.
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Rapid BitChat Android Build
- Calle quickly built the Android BitChat app by porting iOS code using AI tools within half a day.
- This rapid creation showcased how AI accelerates complex app development even without prior Android experience.
Bridging Mesh Networks with Internet
- Connecting individual Bluetooth mesh networks via internet could expand communication range infinitely.
- BitChat plans to use Nostr to bridge offline mesh chats with online networks securely and privately.
Bluetooth Mesh Vulnerability
- Bluetooth mesh communication is inherently vulnerable to jamming with high-powered signals.
- This radio vulnerability is similar to mobile and Wi-Fi networks but offers permissionless, decentralized alternatives.