added get invoice for lnd-engine (#287)

Author: Danny Paz

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "lnd-engine",
-  "version": "0.10.0-beta-rc1",
+  "version": "0.10.0-beta-rc2",
   "description": "A Sparkswap Engine for LND lightning implementation",
   "main": "src/index.js",
   "nyc": {

package.json

@@ -0,0 +1,21 @@
+const { decodePaymentRequest } = require('../lnd-actions')
+
+/**
+ * Returns destination and satoshis from a decoded invoice
+ *
+ * @param {string} paymentRequestString - request string to be decoded
+ * @returns {Promise<object>}
+ */
+async function getInvoice (paymentRequestString) {
+  const {
+    destination,
+    numSatoshis
+  } = await decodePaymentRequest(paymentRequestString, { client: this.client })
+
+  return {
+    destination,
+    numSatoshis
+  }
+}
+
+module.exports = getInvoice

src/engine-actions/get-invoice.js

@@ -47,6 +47,7 @@ const {
   ExpiredSwapError
 } = require('./wait-for-swap-commitment.js')
 const initiateSwap = require('./initiate-swap')
+const getInvoice = require('./get-invoice')
 
 module.exports = {
   validationDependentActions: {
@@ -85,7 +86,8 @@ module.exports = {
     getTotalBalanceForAddress,
     cancelSwap,
     settleSwap,
-    initiateSwap
+    initiateSwap,
+    getInvoice
   },
   unlockedDependentActions: {
     getPublicKey,