Add macros to derive message serializations.

rust/lib/yellowstone/src/lib.rs

@@ -0,0 +1,38 @@
+#![no_std]
+
+extern crate alloc;
+
+use alloc::string::String;
+use alloc::string::ToString;
+use mammoth::syscall::z_cap_t;
+use mammoth::syscall::ZError;
+use yunq::ByteBuffer;
+use yunq::YunqMessage;
+use yunq_derive::YunqMessage;
+
+#[derive(YunqMessage)]
+pub struct GetEndpointRequest {
+    pub endpoint_name: String,
+}
+
+#[derive(YunqMessage)]
+pub struct Endpoint {
+    pub endpoint: z_cap_t,
+}
+
+pub struct YellowstoneClient {
+    endpoint_cap: z_cap_t,
+    byte_buffer: ByteBuffer<0x1000>,
+}
+
+impl YellowstoneClient {
+    pub fn new(endpoint_cap: z_cap_t) -> Self {
+        Self {
+            endpoint_cap,
+            byte_buffer: ByteBuffer::new(),
+        }
+    }
+    pub fn get_endpoint(&mut self, req: &GetEndpointRequest) -> Result<Endpoint, ZError> {
+        yunq::client::call_endpoint(req, &mut self.byte_buffer, self.endpoint_cap)
+    }
+}