From 4f5ab638df51d181e4e25747dd5ff00e6301ba59 Mon Sep 17 00:00:00 2001
From: Christian Decker <decker.christian@gmail.com>
Date: Fri, 11 Nov 2022 14:34:46 +0100
Subject: [PATCH] grpc: Add the experimental optional flag to protoc

The `optional` keyword was first removed, and then re-added again, and
then it was made into an experimental flag. Come on people, decide
already which one it is...
---
 cln-grpc/build.rs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/cln-grpc/build.rs b/cln-grpc/build.rs
index 17f86d001..cd13d0529 100644
--- a/cln-grpc/build.rs
+++ b/cln-grpc/build.rs
@@ -1,3 +1,7 @@
 fn main() {
-    tonic_build::compile_protos("proto/node.proto").unwrap();
+    let builder = tonic_build::configure();
+    builder
+        .protoc_arg("--experimental_allow_proto3_optional")
+        .compile(&["proto/node.proto"], &["proto"])
+        .unwrap();
 }