Show compile_error if unusable feature combination is used

DanGould · DanGould · commit bfa282f2dab2 · 2025-02-19T21:14:28.000-05:00
Certain features must be present for the compilation to have any use at all.
diff --git a/payjoin-cli/src/main.rs b/payjoin-cli/src/main.rs
@@ -9,6 +9,9 @@ use url::Url;
 mod app;
 mod db;
 
+#[cfg(not(any(feature = "v1", feature = "v2")))]
+compile_error!("At least one of the features ['v1', 'v2'] must be enabled");
+
 #[tokio::main]
 async fn main() -> Result<()> {
     env_logger::init();
diff --git a/payjoin/src/lib.rs b/payjoin/src/lib.rs
@@ -17,6 +17,9 @@
 //!
 //! **Use at your own risk. This crate has not yet been reviewed by independent Rust and Bitcoin security professionals.**
 
+#[cfg(not(any(feature = "directory", feature = "v1", feature = "v2")))]
+compile_error!("At least one of the features ['directory', 'v1', 'v2'] must be enabled");
+
 #[cfg(feature = "_core")]
 pub extern crate bitcoin;
 
