feat: add msg_id.rs (#36)

Author: Rakowskiii

relay_rpc/Cargo.toml

@@ -22,3 +22,4 @@ once_cell = "1.16"
 jsonwebtoken = "8.1"
 k256 = { version = "0.13", optional = true }
 sha3 = { version = "0.10", optional = true }
+sha2 = { version = "0.10.6" }

relay_rpc/src/rpc.rs

@@ -11,6 +11,7 @@ use {
     std::{fmt::Debug, sync::Arc},
 };
 
+pub mod msg_id;
 #[cfg(test)]
 mod tests;
 pub mod watch;

relay_rpc/src/rpc/msg_id.rs

@@ -0,0 +1,26 @@
+use {
+    crate::rpc,
+    sha2::{Digest, Sha256},
+};
+
+pub trait MsgId {
+    fn msg_id(&self) -> String;
+}
+
+impl MsgId for rpc::Publish {
+    fn msg_id(&self) -> String {
+        let msg_id = Sha256::new()
+            .chain_update(self.message.as_ref().as_bytes())
+            .finalize();
+        format!("{msg_id:x}")
+    }
+}
+
+impl MsgId for rpc::Subscription {
+    fn msg_id(&self) -> String {
+        let msg_id = Sha256::new()
+            .chain_update(self.data.message.as_ref().as_bytes())
+            .finalize();
+        format!("{msg_id:x}")
+    }
+}