example.js

var fs = require('fs');
var grpc = require('grpc');
var http = require('request-promise');

// use a macaroon file to prevent that no one else messes around with your node
var macaroon = fs.readFileSync("../admin.macaroon").toString('hex');

///// REST Example /////

// Add this line if your server has no valid SSL certificate
process.env["NODE_TLS_REJECT_UNAUTHORIZED"] = '0';

http.get('https://' + LND_NODE_IP_ADDRESS + ':8080/v1/getinfo', {
    headers: {
        'Grpc-Metadata-macaroon': macaroon
    },
    json: true
}).then((response) => {
    console.log(response);
});

///// gRPC Example /////

// From the official DOCs:
// "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';

var lndCert = fs.readFileSync('../tls.cert');
var sslCreds = grpc.credentials.createSsl(lndCert);
var macaroonCreds = grpc.credentials.createFromMetadataGenerator(function (args, callback) {
    var metadata = new grpc.Metadata();
    metadata.add('macaroon', macaroon);
    callback(null, metadata);
});
var creds = grpc.credentials.combineChannelCredentials(sslCreds, macaroonCreds);
var lnrpcDescriptor = grpc.load('../rpc.proto');
var lnrpc = lnrpcDescriptor.lnrpc;
var lightning = new lnrpc.Lightning(LND_NODE_IP_ADDRESS, creds);

lightning.getInfo({}, function (err, response) {
    console.log(response);
});