Pay Lightning Invoice

export BITGO_EXPRESS_HOST="<YOUR_LOCALHOST>"
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
}'

  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);

export BITGO_EXPRESS_HOST="<YOUR_LOCAL_HOST>"
export COIN="ofctbtc"
export WALLET_ID="<YOUR_GO_ACCOUNT_WALLET_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export WALLET_PASSPHRASE="<YOUR_GO_ACCOUNT_PASSPHRASE>"
export INVOICE="<LIGHTNING_INVOICE_STRING>"
export AMOUNT="<AMOUNT_IN_SATOSHIS>"

curl -X POST \
  http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/$WALLET_ID/sendcoins \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "address": "'"$INVOICE"'",
    "amount": "'"$AMOUNT"'",
    "walletPassphrase": "'"$WALLET_PASSPHRASE"'"
}'

const wallet = await bitgo.coin('ofctbtc').wallets().get({ id: walletId });

const result = await wallet.send({
  address: 'lntbs1...', // Lightning invoice string
  amount: 1000,         // Amount in satoshis
  walletPassphrase: '<YOUR_GO_ACCOUNT_PASSPHRASE>',
});
console.dir(result);

export COIN="ofctbtc"
export WALLET_ID="<YOUR_GO_ACCOUNT_WALLET_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export INVOICE="<LIGHTNING_INVOICE_STRING>"
export AMOUNT="<AMOUNT_IN_SATOSHIS>"

curl -X POST \
  https://app.bitgo-test.com/api/v2/$COIN/wallet/$WALLET_ID/tx/build \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "recipients": [
      {
        "amount": "'"$AMOUNT"'",
        "address": "'"$INVOICE"'"
      }
    ]
}'

const wallet = await bitgo.coin('ofctbtc').wallets().get({ id: walletId });

const buildResult = await wallet.prebuildTransaction({
  recipients: [
    {
      amount: 1000,
      address: 'lntbs1...', // Lightning invoice string
    },
  ],
});
console.dir(buildResult);

export BITGO_EXPRESS_HOST="<YOUR_LOCAL_HOST>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export WALLET_ID="<YOUR_GO_ACCOUNT_WALLET_ID>"
export WALLET_PASSPHRASE="<YOUR_GO_ACCOUNT_PASSPHRASE>"

curl -X POST \
  http://$BITGO_EXPRESS_HOST/api/v2/ofc/signPayload \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
   "walletId": "'"$WALLET_ID"'",
   "walletPassphrase": "'"$WALLET_PASSPHRASE"'",
   "payload": "<PAYLOAD_FROM_BUILD_STEP>"
}'

const tradingAccount = wallet.toTradingAccount();
const signature = await tradingAccount.signPayload({
  payload: JSON.stringify(buildResult.payload),
  walletPassphrase: '<YOUR_GO_ACCOUNT_PASSPHRASE>',
});
console.dir(signature);