proto: add patch to fix pool GetInfo response

Author: jamaljsr

app/scripts/build-protos.js

@@ -52,28 +52,28 @@ const protoSources = async () => {
 const filePatches = {
   lnd: {
     patch: 'lnrpc: {}',
-    folder: 'proto'
+    folder: 'proto',
   },
   loop: {
     patch: 'looprpc: {}',
-    folder: 'proto'
+    folder: 'proto',
   },
   common: {
     patch: 'looprpc: {}',
-    folder: 'proto'
+    folder: 'proto',
   },
   trader: {
     patch: 'poolrpc: {}',
-    folder: 'proto'
+    folder: 'proto',
   },
   'auctioneerrpc/auctioneer': {
     patch: 'poolrpc: {}',
-    folder: 'proto'
+    folder: 'proto',
   },
   'lit-sessions': {
     patch: 'litrpc: {}',
-    folder: 'litrpc'
-  }
+    folder: 'litrpc',
+  },
 };
 
 /**
@@ -132,9 +132,9 @@ const generate = async () => {
     '.bin',
     platform() === 'win32' ? 'protoc-gen-ts.cmd' : 'protoc-gen-ts',
   );
-  const files = Object
-      .keys(filePatches)
-      .map(name => `../${filePatches[name].folder}/${name}.proto`);
+  const files = Object.keys(filePatches).map(
+    name => `../${filePatches[name].folder}/${name}.proto`,
+  );
   const protocCmd = [
     'protoc',
     `-I../proto`,
@@ -185,13 +185,35 @@ const patch = async () => {
   }
 };
 
+/**
+ * *Temporary* patch to workaround a grpc-web issue with deserializing the GetInfoResponse.market_info field.
+ * This patch will just comment it out in the proto file, which will omit the field in the JS/TS serialization
+ * code that is generated by the protoc-gen-ts plugin.
+ * See: https://github.com/lightninglabs/lightning-terminal/pull/337
+ */
+const patchPool = async () => {
+  console.log('\nPatching Pool proto file');
+  const path = join(appPath, '..', 'proto', 'trader.proto');
+
+  console.log(` - ${path}`);
+  let content = await fs.readFile(path);
+
+  // comment out the `market_info` field
+  const line = 'map<uint32, MarketInfo> market_info = 15;';
+  const patch = '// [workaround, see patchPool() in build-protos.js] ';
+  content = content.toString().replace(line, patch + line);
+
+  await fs.writeFile(path, content);
+};
+
 /**
  * An async wrapper with error handling around the two funcs above
  */
 const main = async () => {
   try {
     await download();
     await sanitize();
+    await patchPool();
     await generate();
     await patch();
   } catch (error) {