re-enable lnd support

1 files changed, 36 insertions, 0 deletions

diff --git a/lib/lnd.js b/lib/lnd.js
new file mode 100644
index 00000000..c6caf3be
--- /dev/null
+++ b/lib/lnd.js
@@ -0,0 +1,36 @@
+const fs = require('fs');
+const path = require('path');
+const grpc = require('@grpc/grpc-js');
+const protoLoader = require('@grpc/proto-loader');
+const { promisify } = require('util');
+
+
+module.exports = ({ tls, macaroon, server }) => {
+  const packageDefinition = protoLoader.loadSync('config/rpc.proto', {
+    keepCase: true,
+    longs: String,
+    enums: String,
+    defaults: true,
+    oneofs: true
+  });
+  const lnrpc = grpc.loadPackageDefinition(packageDefinition).lnrpc;
+  process.env.GRPC_SSL_CIPHER_SUITES = 'HIGH+ECDSA'
+  const lndCert = fs.readFileSync(tls);
+  const sslCreds = grpc.credentials.createSsl(lndCert);
+  const macaroonCreds = grpc.credentials.createFromMetadataGenerator(function(args, callback) {
+      const macaroonFile = fs.readFileSync(macaroon).toString('hex');
+      const metadata = new grpc.Metadata()
+      metadata.add('macaroon', macaroonFile);
+      callback(null, metadata);
+    });
+  const creds = grpc.credentials.combineChannelCredentials(sslCreds, macaroonCreds);
+  const lnd = new lnrpc.Lightning(server, creds);
+  
+  return new Proxy(lnd, {
+    get(target, key) {
+      const method = target[key];
+      if (typeof method === 'function' && !key.startsWith('sub')) return promisify(method);
+      return target[key];
+    },
+  });
+}