Withdraw On Chain from Lightning Wallet

// 1. Transfer Bitcoin from L2 to L1
// Contact support@bitgo.com to transfer bitcoin from L2 to L1

// 2. Build, Authenticate, and Send Transaction
export BITGO_EXPRESS_HOST="<YOUR_LOCAL_HOST>"
export COIN="tlnbtc"
export WALLET_ID="<YOUR_WALLET_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export WALLET_PASSPHRASE="<YOUR_WALLET_PASSPHRASE>"
export DESTINATION_ADDRESS="<DESTINATION_ADDRESS>"
export AMOUNT_SAT="<AMOUNT_IN_SATS>"
export SATSPERVBYTE="<FEE_RATE_IN_SATS_PER_VBYTE>"
export NUM_BLOCKS="<NUMBER_OF_BLOCKS_FOR_CONFIRMATION>"

curl -X POST \
  http://$BITGO_EXPRESS_HOST/api/v2/$COIN/wallet/$WALLET_ID/lightning/withdraw \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "passphrase": "'"$WALLET_PASSPHRASE"'",     # Wallet passphrase
    "recipients": [                             # Array of recipients for the withdrawal
      {
        "amount": "'"$AMOUNT_SAT"'",            # Amount to send in satoshis
        "address": "'"$DESTINATION_ADDRESS"'"   # Destination Bitcoin address
      }
    ],
    "satsPerVbyte": "'"$SATSPERVBYTE"'"         # Fee rate in satoshis per virtual byte
    "numBlocks": "'"$NUM_BLOCKS"'"              # Target number of blocks for confirmation, used for fee estimation
    "sequenceId": string,                       # Custom identifier for tracking the payment
    "comment": string                           # Additional note or comment for internal reference
  }'

// 3. (Optional) Approve Transaction
export APPROVAL_ID="<APPROVAL_ID>"
export ACCESS_TOKEN="<YOUR_ACCESS_TOKEN>"
export OTP="<YOUR_OTP>"

curl -X PUT \
  https://app.bitgo-test.com/api/v2/pendingApprovals/$APPROVAL_ID \
  -H 'Content-Type: application/json' \
  -H "Authorization: Bearer $ACCESS_TOKEN" \
  -d '{
    "state": "approved",
    "otp": "'"$OTP"'"
  }'

// 1. Transfer Bitcoin from L2 to L1
// Contact support@bitgo.com to transfer bitcoin from L2 to L1

// 2. Build, Authenticate, and Send Transaction
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 onchainWithdrawal = await lightningWallet.withdrawOnchain({
  recipients: [
    {
      amount: 'amount to be sent in satoshis',
      address: 'destination address'
    }
  ],
  satsPerVbyte: 'fee rate in satoshis per virtual byte',
  passphrase: 'your wallet passphrase',
});
console.dir(onchainWithdrawal);

// 3. (Optional) Approve Transaction
const baseCoin = this.bitgoSDK.coin(initialPendingApproval.coin);
const pendingApproval = await baseCoin.pendingApprovals().get({ id: initialPendingApproval.id });
const result = await pendingApproval.approve(params);