Add Vss thin client protobuf generation & build/CI setup

Author: G8XSU

vss-accessor/build.rs

@@ -0,0 +1,23 @@
+extern crate prost_build;
+
+use std::fs;
+use std::fs::File;
+use std::path::Path;
+
+fn main() {
+	download_file(
+		"https://raw.githubusercontent.com/lightningdevkit/vss-server/main/app/src/main/proto/vss.proto",
+		"src/proto/vss.proto",
+	)
+	.unwrap();
+
+	prost_build::compile_protos(&["src/proto/vss.proto"], &["src/"]).unwrap();
+}
+
+fn download_file(url: &str, save_to: &str) -> Result<(), Box<dyn std::error::Error>> {
+	let mut response = reqwest::blocking::get(url)?;
+	fs::create_dir_all(Path::new(save_to).parent().unwrap())?;
+	let mut out_file = File::create(save_to)?;
+	response.copy_to(&mut out_file)?;
+	Ok(())
+}