Cashu skill

Cashu Wallet

Cashu Wallet is a lightweight, privacy-focused Bitcoin wallet powered by Cashu ecash. It allows you to send and receive payments instantly using the Lightning Network or by exchanging ecash tokens directly.

🌟 Key Features

• Bitcoin over Lightning: Seamlessly send and receive Lightning payments.
• Cashu Ecash: Privacy-preserving ecash tokens.
• Multi-Mint Support: Connect to multiple mints to diversify risk or support different currencies (sats, usd, eur, etc., depending on the mint).

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📦 Installation & Setup

The wallet is a Node.js CLI application located in this directory.

1. Install Dependencies:

   cd cli
   npm install
   

2. Create Alias (Optional but Recommended): To make commands easier to run, you can create an alias:

   alias cashu='node cli/wallet.mjs'
   

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🚀 Usage Guide

All commands can be run using node cli/wallet.mjs <command> (or cashu <command> if aliased).

1. Managing Mints

Before you can do anything, you need to trust a Mint. A mint exchanges Bitcoin (Lightning) for ecash tokens.

• List Mints: View connected mints and their status.

  node cli/wallet.mjs mints
  

• Add a Mint: connect to a new mint URL.

  node cli/wallet.mjs add-mint https://mint.url
  # Example (Testnut):
  node cli/wallet.mjs add-mint https://testnut.cashu.space
  

2. Receiving Money (In)

• Via Lightning (Deposit): Create a Lightning invoice to swap BTC for ecash.

  # Usage: invoice <amount> [mint_url]
  node cli/wallet.mjs invoice 1000
  

  This command will generate an invoice and wait for payment. Once paid, it automatically mints the tokens.

• Via Ecash Token: Receive a Cashu token string sent by someone else.

  # Usage: receive <token>
  node cli/wallet.mjs receive "cashuA..."
  

3. Sending Money (Out)

• Via Lightning (Pay Invoice): Pay a BOLT11 Lightning invoice using your ecash balance.

  # Usage: pay-invoice <bolt11_invoice> [mint_url]
  node cli/wallet.mjs pay-invoice lnbc10u...
  

• Via Ecash Token: Generate a token to send to someone else off-chain.

  # Usage: send <amount> [mint_url]
  node cli/wallet.mjs send 500
  

  Output: A cashuA... token string that you can share.

4. Wallet Management

• Check Balance: See your total balance across all mints.

  node cli/wallet.mjs balance
  

• Transaction History: View past deposits, withdrawals, and transfers.

  node cli/wallet.mjs history
  

• Check Pending Invoice: If you created an invoice but closed the CLI before it confirmed, check it manually.

  # Usage: check-invoice <quote_id> [mint_url]
  node cli/wallet.mjs check-invoice "quote_id_here"
  

• Restore Wallet: Recover funds from a specific mint using your seed (stored in ~/.cashu-wallet/seed.txt).

  node cli/wallet.mjs restore https://mint.url
  

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🛠️ Troubleshooting

• Logs & Data: Data is stored in ~/.cashu-wallet/wallet.db.
• Recommended Mint: https://mint.coinos.io