Cashu Wallet

A privacy-first iOS wallet for Cashu ecash and the Lightning Network, with on-chain Bitcoin support and NFC contactless payments.

Built with SwiftUI, targets iOS 18+, and uses cdk-swift (the Cashu Dev Kit) under the hood.

Features

• Ecash — mint, send, and redeem Cashu tokens across multiple mints
• Lightning — pay and receive BOLT11 invoices, with Lightning Address support
• On-chain — send to and receive from regular Bitcoin addresses
• Contactless (NFC) — tap-to-pay using NDEF tags
• Nostr — NWC (Nostr Wallet Connect), payment requests, and NPC integration
• P2PK locking, multi-mint discovery, and deterministic recovery from seed
• Backup & restore from BIP-39 seed phrase

Screenshots

Launch	Onboarding	Wallet

Send options	Settings

Receive on-chain	Send on-chain

Building

Open CashuWallet.xcodeproj in Xcode 16+ and run on an iOS 18 simulator or device. Swift Package Manager resolves cdk-swift automatically.

For a CLI build to the simulator:

xcodebuild -project CashuWallet.xcodeproj \
  -scheme CashuWallet \
  -destination 'platform=iOS Simulator,name=iPhone 17 Pro' \
  build

Project layout

• CashuWallet/App — app entry point and root view
• CashuWallet/Core — services (wallet, mints, NFC, Nostr, keychain), navigation, settings
• CashuWallet/Views — SwiftUI views grouped by flow (Send, Receive, Mints, History, Settings)
• CashuWallet/Models — data types and protocols