Pay Lightning Invoice - Custody

// 1. Pay Lightning Invoice
export BITGO_EXPRESS_HOST="<YOUR_LOCAL_HOST>"
export COIN="tlnbtc"
export WALLET_ID="<YOUR_WALLET_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export ADDRESS="<DESTINATION_ADDRESS>"
export AMOUNT="<AMOUNT_IN_BASE_UNITS>"
export WALLET_PASSPHRASE="<YOUR_WALLET_PASSPHRASE>"

curl -X POST \
  http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/$WALLET_ID/lightning/payment \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "invoice": string,                       # Encoded payment request (required)
    "passphrase": "'"$WALLET_PASSPHRASE"'",  # Wallet passphrase (required)
    "amountMsat": string,     # Amount to pay in millisatoshis (optional, required for zero-amount invoices)
    "feeLimitMsat": string,   # Maximum fee to pay in millisatoshis
    "feeLimitRatio": number,  # Maximum fee expressed as a ratio of the payment amount
    "sequenceId": string,     # Custom identifier for tracking the payment
    "comment": string         # Additional note or comment for internal reference
}'

// 1. Pay Lightning Invoice
const { BitGo } = require('bitgo');
const { getLightningWallet } = require('@bitgo/abstract-lightning');
const accessToken = '<YOUR_ACCESS_TOKEN>';

// Initialize the SDK
const bitgo = new BitGo({
  accessToken: accessToken,
  env: 'test',
  customRootURI: 'https://app.bitgo-test.com',
});

// Enter your Lightning wallet
const walletId = '<YOUR_WALLET_ID>'
const existingWallet = await bitgo.coin('tlnbtc').wallets().get({ id: walletId });
const lightningWallet = getLightningWallet(existingWallet);

const payInvoice = await lightningWallet.payInvoice({
  invoice: 'lnbtc...',
  passphrase: 'your wallet passphrase',
});
console.dir(payInvoice);