Merge pull request #32 from mayankchhabra/feature/sweep

Sweep (use all funds)

logic/lightning.js

@@ -103,9 +103,9 @@ function decodePaymentRequest(paymentRequest) {
 // Estimate the cost of opening a channel. We do this by repurposing the existing estimateFee grpc route from lnd. We
 // generate our own unused address and then feed that into the existing call. Then we add an extra 10 sats per
 // feerateSatPerByte. This is because the actual cost is slightly more than the default one output estimate.
-async function estimateChannelOpenFee(amt, confTarget) {
+async function estimateChannelOpenFee(amt, confTarget, sweep) {
   const address = (await generateAddress()).address;
-  const baseFeeEstimate = await estimateFee(address, amt, confTarget, false);
+  const baseFeeEstimate = await estimateFee(address, amt, confTarget, sweep);
 
   if (confTarget === 0) {
     const keys = Object.keys(baseFeeEstimate);

routes/v1/lnd/channel.js

@@ -13,10 +13,11 @@ router.get('/', auth.jwt, safeHandler((req, res) =>
     .then(channels => res.json(channels))
 ));
 
-router.get('/estimateFee', auth.jwt, safeHandler(async(req, res, next) => {
+router.get('/estimateFee', auth.jwt, safeHandler(async (req, res, next) => {
 
   const amt = req.query.amt; // Denominated in Satoshi
   const confTarget = req.query.confTarget;
+  const sweep = req.query.sweep === 'true';
 
   try {
     validator.isPositiveIntegerOrZero(confTarget);
@@ -25,7 +26,7 @@ router.get('/estimateFee', auth.jwt, safeHandler(async(req, res, next) => {
     return next(error);
   }
 
-  return await lightningLogic.estimateChannelOpenFee(parseInt(amt, 10), parseInt(confTarget, 10))
+  return await lightningLogic.estimateChannelOpenFee(parseInt(amt, 10), parseInt(confTarget, 10), sweep)
     .then(response => res.json(response));
 }));