1 files changed, 60 insertions, 0 deletions
diff --git a/jsonrpc/src/service.rs b/jsonrpc/src/service.rs
new file mode 100644
index 0000000..f0e2828
--- /dev/null
+++ b/jsonrpc/src/service.rs
@@ -0,0 +1,60 @@
+use std::{future::Future, pin::Pin};
+
+use crate::Result;
+
+/// Represents the RPC method
+pub type RPCMethod<'a> = Box<dyn Fn(serde_json::Value) -> RPCMethodOutput<'a> + Send + 'a>;
+type RPCMethodOutput<'a> =
+    Pin<Box<dyn Future<Output = Result<serde_json::Value>> + Send + Sync + 'a>>;
+
+/// Defines the interface for an RPC service.
+pub trait RPCService: Sync + Send {
+    fn get_method<'a>(&'a self, name: &'a str) -> Option<RPCMethod>;
+    fn name(&self) -> String;
+}
+
+/// Implements the `RPCService` trait for a provided type.
+///
+/// # Example
+///
+/// ```
+/// use serde_json::Value;
+///
+/// use karyons_jsonrpc::{JsonRPCError, register_service};
+///
+/// struct Hello {}
+///
+/// impl Hello {
+///     async fn say_hello(&self, params: Value) -> Result<Value, JsonRPCError> {
+///         Ok(serde_json::json!("hello!"))
+///     }
+/// }
+///
+/// register_service!(Hello, say_hello);
+///
+/// ```
+#[macro_export]
+macro_rules! register_service {
+    ($t:ty, $($m:ident),*) => {
+        impl karyons_jsonrpc::RPCService for $t {
+            fn get_method<'a>(
+                &'a self,
+                name: &'a str
+            ) -> Option<karyons_jsonrpc::RPCMethod> {
+                match name {
+                $(
+                    stringify!($m) => {
+                        Some(Box::new(move |params: serde_json::Value| Box::pin(self.$m(params))))
+                    }
+                )*
+                    _ => None,
+                }
+
+
+            }
+            fn name(&self) -> String{
+                stringify!($t).to_string()
+            }
+        }
+    };
+}