feature(sendcoinds): add sendcoins endpoint/functionality to back end

app/lnd/methods/index.js

@@ -15,6 +15,7 @@ import payinvoice from './payinvoice'
 import payments from './payments'
 import peers from './peers'
 import pendingchannels from './pendingchannels'
+import sendcoins from './sendcoins'
 import walletbalance from './walletbalance'
 
 export default function (lnd, event, msg, data) {
@@ -91,6 +92,13 @@ export default function (lnd, event, msg, data) {
         .then(({ payment_route }) => event.sender.send('paymentSuccessful', Object.assign(data, { payment_route })))
         .catch(error => console.log('payinvoice error: ', error))
       break
+    case 'sendCoins':
+    // Transaction looks like { txid: String }
+    // { addr, amount } = data
+      sendcoins(lnd, data)
+        .then((transaction) => event.sender.send('sendSuccessful', transaction)
+        .catch(error => console.log('sendcoins error: ', error))
+      break
     case 'openChannel':
     // Response is empty. Streaming updates on channel status and updates
     // { pubkey, localamt, pushamt } = data

app/lnd/methods/sendcoins.js

@@ -0,0 +1,10 @@
+// LND send coins on chain
+export default function sendcoins(lnd, { addr, amount }) {
+  return new Promise((resolve, reject) => {
+    lnd.sendCoins({ addr, amount }, (err, data) => {
+      if (err) { reject(err) }
+
+      resolve(data)
+    })
+  })
+}