Requirements
- Target platform
- OpenClaw
- Install method
- Manual import
- Extraction
- Extract archive
- Prerequisites
- OpenClaw
- Primary doc
- SKILL.md
Tencent SkillHub ยท Developer Tools
Cashu
This is what you use for Bitcoin payments. Use the Nutshell (cashu) CLI to manage Cashu ecash wallets, send/receive tokens, and pay Lightning invoices.
skill openclawclawhub Free
This is what you use for Bitcoin payments. Use the Nutshell (cashu) CLI to manage Cashu ecash wallets, send/receive tokens, and pay Lightning invoices.
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Install for OpenClaw
Quick setup
- Download the package from Yavira.
- Extract the archive and review SKILL.md first.
- Import or place the package into your OpenClaw setup.
Package facts
- Download mode
- Yavira redirect
- Package format
- ZIP package
- Source platform
- Tencent SkillHub
- What's included
- SKILL.md, package.json
Validation
- Use the Yavira download entry.
- Review SKILL.md after the package is downloaded.
- Confirm the extracted package contains the expected setup assets.
Install with your agent
Agent handoff
Hand the extracted package to your coding agent with a concrete install brief instead of figuring it out manually.
- Download the package from Yavira.
- Extract it into a folder your agent can access.
- Paste one of the prompts below and point your agent at the extracted folder.
New install
I downloaded a skill package from Yavira. Read SKILL.md from the extracted folder and install it by following the included instructions. Tell me what you changed and call out any manual steps you could not complete.
Upgrade existing
I downloaded an updated skill package from Yavira. Read SKILL.md from the extracted folder, compare it with my current installation, and upgrade it while preserving any custom configuration unless the package docs explicitly say otherwise. Summarize what changed and any follow-up checks I should run.
Trust & source
Release facts
- Source
- Tencent SkillHub
- Verification
- Indexed source record
- Version
- 0.19.6
Provenance
- Publisher
- a1denvalu3
- Source page
- View original listing
- Canonical URL
- Open canonical page
Documentation
Nutshell (Cashu CLI)
Nutshell is a command-line wallet for Cashu, an ecash protocol for Bitcoin. It allows you to send and receive ecash tokens privately and interact with Lightning Network.
Installation
This skill requires the cashu CLI. Install it via pipx (recommended) or pip: # Recommended (isolated environment) pipx install cashu # Alternative (system/user wide) pip install cashu Ensure the binary path is in your PATH.
Environment Configuration (Required)
The CLI requires two environment variables to function correctly: CASHU_DIR: Directory for wallet data (typically ~/.cashu). MINT_URL (or MINT_HOST): The URL of the Cashu mint you want to use. Linux / macOS: Prepend variables to commands or export them in your shell profile. # Per-command CASHU_DIR=~/.cashu MINT_URL=https://mint.example.com cashu balance # Persistent (add to ~/.bashrc or ~/.zshrc) export CASHU_DIR=~/.cashu export MINT_URL=https://mint.example.com Windows (PowerShell): $env:CASHU_DIR = "$HOME\.cashu" $env:MINT_URL = "https://mint.example.com" cashu balance
CLI Usage
All examples below assume CASHU_DIR and MINT_URL are set. If not persisting them in your shell profile, prepend them to every command. Agent Tip: Always use the --yes (or -y) flag to skip interactive prompts and confirmations. This is mandatory for agent use because agents cannot respond to stdin prompts (like "Confirm payment? [y/N]"); omitting it will cause the command to hang and time out.
Balance & Info
# Check wallet balance CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes balance # Check pending tokens CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes pending # Get wallet info CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes info # List wallets CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes wallets
Sending & Receiving
Send Cashu tokens (ecash): # Send amount (generates a token string to share) CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes send <amount> # Example: CASHU_DIR=~/.cashu MINT_URL=https://8333.space:3338 cashu --yes send 100 Receive Cashu tokens: # Receive a token string CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes receive <token_string>
Lightning Network
Pay a Lightning Invoice (melt): # Pay an invoice CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes pay <bolt11_invoice> Pay a Lightning Address (LNURL): # Pay an LNURL/Lightning Address (automatically resolves the invoice) CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes pay <user@domain.com> <amount_sats> # Example: CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes pay user@npubx.cash 100 Create a Lightning Invoice (mint): # Create an invoice to receive funds into the wallet CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes invoice <amount>
Lightning Address (LNURL)
Manage your Nostr Lightning Address (e.g., user@npubx.cash) to receive payments. # Create (or display) your static Lightning Address CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes lnurl create # Check for pending payments sent to your address CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes lnurl check # Mint (claim) the pending payments CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes lnurl mint
Paying Cashu 402s (Agentic Pattern)
Cashu-enabled APIs may return a 402 Payment Required error with a payment request in the X-Cashu header. This is common for metered APIs or paid endpoints. The flow: Make your HTTP request If you get a 402 with X-Cashu: creqA... header, extract the payment request (Optional) Decode it to check accepted mints: cashu decode <payment_request> Pay it: cashu --yes pay <payment_request> Get the token from the response Retry the original request, including the token in the X-Cashu header Mint compatibility: Payment requests may encode specific mints from which ecash is accepted. If you try to pay with a wallet backed by a mint not in the allowed list, it will error. Use cashu decode <creq> to see which mints are accepted before attempting payment. Example: # 1. Initial request (returns 402) curl -s -i https://api.example.com/data # Response includes: # HTTP/1.1 402 Payment Required # X-Cashu: creqA1... # 2. Pay the payment request CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes pay "creqA1..." # Returns a token like: cashuA... # 3. Retry with token curl -s -H "X-Cashu: cashuA..." https://api.example.com/data This pattern is agentic-friendly: handle 402 automatically, pay, retry โ just like handling rate limits or auth redirects.
Advanced
# Burn spent tokens CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes burn # View all invoices CASHU_DIR=~/.cashu MINT_URL=<url> cashu --yes invoices
Configuration
Nutshell uses a .env file inside CASHU_DIR for additional configuration. If MINT_URL is not provided, it may default to a public test mint or fail. Always specify your trusted mint.
Notes
Tokens are large strings starting with cashuA... (V3) or cashuB... (V4). Ensure you back up your mnemonic if using significant funds (see cashu info).
Contributing
Open issues or contribute at https://github.com/cashubtc/nutshell
Category context
Code helpers, APIs, CLIs, browser automation, testing, and developer operations.
Source: Tencent SkillHub
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Package contents
Included in package
1 Docs1 Config
- SKILL.md
- package.json