base and extension fully compiles, host in good shape

orchid-api-traits/src/relations.rs

@@ -1,3 +1,5 @@
+use std::future::Future;
+
 use super::coding::Coding;
 use crate::helpers::enc_vec;
 
@@ -5,9 +7,12 @@ pub trait Request: Coding + Sized + Send + 'static {
 	type Response: Coding + Send + 'static;
 }
 
-pub fn respond<R: Request>(_: &R, rep: R::Response) -> Vec<u8> { enc_vec(&rep) }
-pub fn respond_with<R: Request>(r: &R, f: impl FnOnce(&R) -> R::Response) -> Vec<u8> {
-	respond(r, f(r))
+pub async fn respond<R: Request>(_: &R, rep: R::Response) -> Vec<u8> { enc_vec(&rep).await }
+pub async fn respond_with<R: Request, F: Future<Output = R::Response>>(
+	r: &R,
+	f: impl FnOnce(&R) -> F,
+) -> Vec<u8> {
+	respond(r, f(r).await).await
 }
 
 pub trait Channel: 'static {