Nutstash

Web-based Cashu ecash wallet. Enables users to hold and transfer Chaumian ecash tokens backed by Lightning Network bitcoin.

Features

• Web wallet — No installation required, runs in browser
• Mint support — Connect to multiple Cashu mints
• Nostr integration — Receive ecash tokens via Nostr direct messages
• Token management — Send, receive, and swap ecash tokens
• Privacy — Mint does not know user identity or transaction graph

How It Works

1. Create wallet at wallet.nutstash.app
2. Add a Cashu mint (Lightning-backed)
3. Deposit bitcoin via Lightning to receive ecash tokens
4. Send tokens to other Nutstash users or over Nostr
5. Redeem tokens back to Lightning when needed

Privacy Model

• Mint cannot link deposits to withdrawals
• Tokens are blinded — mint signs without knowing token value or owner
• Inter-mint swaps break linkability between mints
• Using different wallets for deposit and redemption erases traceability

Related

• Cashu — Chaumian ecash protocol
• Nostr — Nostr protocol for token transfer
• Privacy Stacks — Layered privacy approach
• Chaumian eCash — Chaumian eCash concept overview

Resources

• Nutstash Wallet
• Cashu Protocol