Fedimint Open-source protocol for federated Chaumian e-cash mints integrated with Lightning Network. Each "federation" of trusted guardians (typically 3-15 entities) collectively manages funds. Repos: (Rust). Concept - Users deposit BTC (via on-chain or Lightning) → receive Chaumian e-cash notes signed blindly by guardians. - Notes are bearer instruments (whoever holds them owns them). - Spending: present notes to mint, get new notes (preventing double-spend). - Withdrawal: redeem notes for BTC (LN gateway / on-chain). Why federated Single-mint Chaumian e-cash (e.g., Cashu) → trust one operat…