first commit

backend/app.js

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+const express = require('express');
+const app = express();
+const port = 3001;
+
+const grpc = require('@grpc/grpc-js');
+const protoLoader = require('@grpc/proto-loader');
+const fs = require('fs');
+
+const path = require('path');
+
+// const { Buffer } = 'buffer';
+
+//// gRPC INITIALIZATION
+
+// Due to updated ECDSA generated tls.cert we need to let gprc know that
+// we need to use that cipher suite otherwise there will be a handhsake
+// error when we communicate with the lnd rpc server.
+process.env.GRPC_SSL_CIPHER_SUITES = 'HIGH+ECDSA';
+
+// We need to give the proto loader some extra options, otherwise the code won't
+// fully work with lnd.
+const loaderOptions = {
+  keepCase: true,
+  longs: String,
+  enums: String,
+  defaults: true,
+  oneofs: true,
+};
+const packageDefinition = protoLoader.loadSync(
+  './proto/lighting.proto',
+  loaderOptions
+);
+
+// Load lnd macaroon
+let m = fs.readFileSync(
+  'C:\\Users\\tserg\\.polar\\networks\\1\\volumes\\lnd\\bob\\data\\chain\\bitcoin\\regtest\\admin.macaroon'
+);
+let macaroon = m.toString('hex');
+
+// Build meta data credentials
+let metadata = new grpc.Metadata();
+metadata.add('macaroon', macaroon);
+let macaroonCreds = grpc.credentials.createFromMetadataGenerator(
+  (_args, callback) => {
+    callback(null, metadata);
+  }
+);
+// Combine credentials
+let lndCert = fs.readFileSync(
+  'C:\\Users\\tserg\\.polar\\networks\\1\\volumes\\lnd\\bob\\tls.cert'
+);
+let sslCreds = grpc.credentials.createSsl(lndCert);
+let credentials = grpc.credentials.combineChannelCredentials(
+  sslCreds,
+  macaroonCreds
+);
+
+// Create client
+let lnrpcDescriptor = grpc.loadPackageDefinition(packageDefinition);
+let lnrpc = lnrpcDescriptor.lnrpc;
+let client = new lnrpc.Lightning('127.0.0.1:10002', credentials);
+
+//// ROUTES
+
+app.get('/', (req, res) => {
+  res.send('Kachow!');
+});
+
+app.get('/getinfo', function (req, res) {
+  client.getInfo({}, function (err, response) {
+    if (err) {
+      console.log('Error: ' + err);
+    }
+    res.json(response);
+  });
+});
+
+app.get('/generate-invoice/:source/:price', function (req, res) {
+  let request = {
+    value: req.params['price'],
+    memo: req.params['source'],
+  };
+  client.addInvoice(request, function (err, response) {
+    res.json(response);
+  });
+});
+
+app.get('/check-invoice/:payment_hash', function (req, res) {
+  let request = {
+    r_hash_str: req.params['payment_hash'],
+  };
+  client.lookupInvoice(request, function (err, response) {
+    if (err) {
+      console.log('Error: ' + err);
+    }
+    res.json(response);
+  });
+});
+
+app.get('/file/:source', function (req, res, next) {
+  console.log('/file/:source');
+  var options = {
+    dotfiles: 'deny',
+    headers: {
+      'x-timestamp': Date.now(),
+      'x-sent': true,
+    },
+  };
+
+  var fileName = path.join(path.join(__dirname, 'static'));
+  res.download(
+    path.join(__dirname, 'static', req.params['source']),
+    req.params['source'],
+    options,
+    function (err) {
+      if (err) {
+        next(err);
+      } else {
+        console.log('Sent:', fileName);
+      }
+    }
+  );
+});
+
+app.listen(port, () => {
+  console.log(`Example app listening at http://localhost:${port}`);
+});