Cocod - Cashu Wallet CLI

Cocod is a Cashu wallet for managing ecash tokens and making Bitcoin/Lightning payments. It uses the Cashu protocol for privacy-preserving ecash transactions.

If a web/API request returns HTTP 402 Payment Required with an X-Cashu header, use this skill to parse and settle the request with cocod.

Agent Safety Policy (Required)

When acting as an AGENT with this skill:

• Always ask for explicit user permission before running any command/flow that can spend wallet funds, unless the user has already clearly instructed you to execute that spend action.
• Prefer preview/inspection commands before execution whenever available. For example, run cocod x-cashu parse \x3Crequest> to inspect costs and requirements before cocod x-cashu handle \x3Crequest>.
• Treat ~/.cocod as sensitive. Never log, print, or expose its contents (including config, mnemonic material, wallet state, sockets, and pid files) unless the user explicitly requests a specific safe subset.
• Always surface issues and errors encountered while using the CLI or this skill. Do not hide failures behind partial success messaging.
• Do not manually work around CLI issues, missing behavior, or unexpected command failures without explicit user permission.

What is Cashu?

Cashu is a Chaumian ecash protocol that lets you hold and transfer Bitcoin-backed tokens privately. It enables unlinkable transactions using blind signatures.

Installation

# Install cocod CLI
bun install -g cocod

Version Compatibility

This skill is version-pinned to an exact cocod CLI release.

• metadata.skill_version must match the npm package version.
• metadata.requires_cocod_version is pinned to that exact same version.

Check your installed CLI version:

cocod --version

If the version does not match the pinned values in this file, update cocod before using this skill.

Quick Start

# Initialize your wallet (generates mnemonic automatically)
cocod init

# Or with a custom mint
cocod init --mint-url https://mint.example.com

# Check balance
cocod balance

Commands

Core Wallet

# Check daemon and wallet status
cocod status

# Initialize wallet with optional mnemonic
cocod init [mnemonic] [--passphrase \x3Cpassphrase>] [--mint-url \x3Curl>]

# Unlock encrypted wallet (only required when initialised with passphrase)
cocod unlock \x3Cpassphrase>

# Get wallet balance
cocod balance

# Test daemon connection
cocod ping

Receiving Payments

# Receive Cashu token
cocod receive cashu \x3Ctoken>

# Create Lightning invoice to receive
cocod receive bolt11 \x3Camount> [--mint-url \x3Curl>]

Sending Payments

AGENT rule: commands in this section spend wallet funds. Ask for permission first unless the user already explicitly requested the spend action.

# Create Cashu token to send to someone
cocod send cashu \x3Camount> [--mint-url \x3Curl>]

# Pay a Lightning invoice
cocod send bolt11 \x3Cinvoice> [--mint-url \x3Curl>]

HTTP 402 Web Payments (NUT-24)

Use these commands when a server responds with HTTP 402 and an X-Cashu payment request.

AGENT rule: cocod x-cashu handle \x3Crequest> can spend funds. Prefer cocod x-cashu parse \x3Crequest> first to preview amount/requirements, then ask permission before handling unless already instructed.

# Parse an encoded X-Cashu request from a 402 response header
cocod x-cashu parse \x3Crequest>

# Settle the request and get an X-Cashu payment header value
cocod x-cashu handle \x3Crequest>

Typical flow:

1. Read X-Cashu from the 402 response.
2. Run cocod x-cashu parse \x3Crequest> to inspect amount and mint requirements.
3. Run cocod x-cashu handle \x3Crequest> to generate payment token header value.
4. Retry the original web request with returned X-Cashu: cashuB... header.

Mints

# Add a mint URL
cocod mints add \x3Curl>

# List configured mints
cocod mints list

# Get mint information
cocod mints info \x3Curl>

Lightning Address (NPC)

Lightning Addresses are email-style identifiers (like [email protected]) that let others pay you over Lightning. If you have not purchased a username, NPC provides a free address from your Nostr npub; purchasing a username gives you a human-readable handle. Buying a username is a two-step flow so you can review the required sats before confirming payment.

AGENT rule: cocod npc username \x3Cname> --confirm is a spend action. Ask permission before running --confirm unless already instructed.

# Get your NPC Lightning Address
cocod npc address

# Reserve/buy an NPC username (two-step)
cocod npc username \x3Cname>
cocod npc username \x3Cname> --confirm

History

# View wallet history
cocod history

# With pagination
cocod history --offset 0 --limit 20

# Watch for real-time updates
cocod history --watch

# Limit with watch
cocod history --limit 50 --watch

Daemon Control

# Start the background daemon (started automatically when not running when required)
cocod daemon

# Stop the daemon
cocod stop

Examples

Initialize with encryption:

cocod init --passphrase "my-secret"

Receive via Lightning:

cocod receive bolt11 5000
# Returns: lnbc50u1... (share this invoice to receive)

Pay a Lightning invoice:

cocod send bolt11 lnbc100u1p3w7j3...

Send Cashu to a friend:

cocod send cashu 1000
# Returns: cashuAeyJ0b2tlbiI6...
# Friend receives with: cocod receive cashu cashuAeyJ0b2tlbiI6...

Check status and balance:

cocod status
cocod balance

View recent history:

cocod history --limit 10

Concepts

• Cashu: Privacy-preserving ecash protocol using blind signatures
• Mint: Server that issues and redeems Cashu tokens
• Token: Transferable Cashu string representing satoshi value
• Bolt11: Lightning Network invoice format
• NPC: Lightning Address service for receiving payments
• Mnemonic: Seed phrase for wallet recovery