Commerce

Step 2: Set Up the Lightning Node

# Start litd container (testnet by default)
skills/lnd/scripts/start-lnd.sh

# Create an encrypted wallet
skills/lnd/scripts/create-wallet.sh --mode standalone

# Verify node is running
skills/lnd/scripts/lncli.sh getinfo

Step 3: Fund the Wallet

# Generate a Bitcoin address
skills/lnd/scripts/lncli.sh newaddress p2tr

# Send BTC to this address from an exchange or another wallet

# Verify balance
skills/lnd/scripts/lncli.sh walletbalance

Step 4: Open a Channel

# Connect to a well-connected node (e.g., ACINQ, Bitfinex)
skills/lnd/scripts/lncli.sh connect <pubkey>@<host>:9735

# Open a channel
skills/lnd/scripts/lncli.sh openchannel --node_key=<pubkey> --local_amt=1000000

# Wait for channel to confirm (6 blocks)
skills/lnd/scripts/lncli.sh listchannels

Step 5: Configure lnget

# Initialize lnget config (auto-detects local lnd)
lnget config init

# Verify connection
lnget ln status

Step 6: Fetch Paid Resources

# Fetch an L402-protected resource
lnget --max-cost 1000 https://api.example.com/paid-data

# Preview without paying
lnget --no-pay https://api.example.com/paid-data

# Check cached tokens
lnget tokens list

Step 7: Host Paid Endpoints (Optional)

# Start your backend service
python3 -m http.server 8080 &

# Configure aperture to protect it
skills/aperture/scripts/setup.sh --insecure --port 8081

# Start the L402 paywall
skills/aperture/scripts/start.sh

# Other agents can now pay to access your endpoints
# lnget --max-cost 100 https://your-host:8081/api/data

Agent-to-Agent Commerce

The full loop for autonomous agent commerce:

Agent A (buyer)                    Agent B (seller)
─────────────                      ─────────────
lnd node running                   lnd node running
  ↓                                  ↓
lnget fetches URL ──────────────→ aperture receives request
                                     ↓
                                   Returns 402 + invoice
  ↓
lnget pays invoice ─────────────→ lnd receives payment
  ↓                                  ↓
lnget retries with token ───────→ aperture validates token
                                     ↓
                                   Proxies to backend
  ↓                                  ↓
Agent A receives data ←──────────  Backend returns data

Buyer Agent Setup

# One-time setup
skills/lnd/scripts/install.sh
skills/lnget/scripts/install.sh
skills/lnd/scripts/start-lnd.sh
skills/lnd/scripts/create-wallet.sh --mode standalone
lnget config init

# Fund wallet and open channels (one-time)
skills/lnd/scripts/lncli.sh newaddress p2tr
# ... send BTC ...
skills/lnd/scripts/lncli.sh openchannel --node_key=<pubkey> --local_amt=500000

# Ongoing: fetch paid resources
lnget --max-cost 100 -q https://seller-api.example.com/api/data | jq .

Seller Agent Setup

# One-time setup
skills/lnd/scripts/install.sh
skills/aperture/scripts/install.sh
skills/lnd/scripts/start-lnd.sh
skills/lnd/scripts/create-wallet.sh --mode standalone

# Configure and start paywall
skills/aperture/scripts/setup.sh --port 8081 --insecure

# Start backend with content to sell
mkdir -p /tmp/api-data
echo '{"market_data": "..."}' > /tmp/api-data/data.json
cd /tmp/api-data && python3 -m http.server 8080 &

# Start aperture
skills/aperture/scripts/start.sh

# Buyers can now access:
# https://your-host:8081/api/data.json (100 sats per request)

Cost Management

Agents should always control spending:

# Set a hard limit per request
lnget --max-cost 500 https://api.example.com/data

# Check cost before paying
lnget --no-pay --json https://api.example.com/data | jq '.invoice_amount_sat'

# Track spending via token list
lnget tokens list --json | jq '[.[] | .amount_paid_sat] | add'

Security Summary

For production use with significant funds, use watch-only mode with a remote signer container. See the lightning-security-module skill for details.

Stopping Everything

skills/aperture/scripts/stop.sh
skills/lnd/scripts/stop-lnd.sh