client server connection loop

src-common/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "wyd-common"
+version = "0.1.0"
+edition = "2024"
+publish = false
+
+[dependencies]
+serde = { version = "1", features = ["derive"] }

src-common/src/lib.rs

@@ -0,0 +1,36 @@
+use serde::{Deserialize, Serialize};
+
+pub const VERSION: u8 = 1;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Profile {
+    pub id: String,
+    pub display_name: String,
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "camelCase")]
+pub enum ClientMessage {
+    Register { profile: Profile, signature: String },
+    Signed { payload: String, signature: String },
+}
+
+#[derive(Debug, Serialize, Deserialize)]
+#[serde(tag = "type", rename_all = "camelCase")]
+pub enum ServerMessage {
+    Challenge { version: u8, challenge: String },
+    Registered,
+}
+
+pub fn register_bytes(challenge: &str, profile: &Profile) -> Vec<u8> {
+    format!(
+        "wyd-register-v{VERSION}\n{challenge}\n{}\n{}",
+        profile.id, profile.display_name
+    )
+    .into_bytes()
+}
+
+pub fn message_bytes(payload: &str) -> Vec<u8> {
+    format!("wyd-message-v{VERSION}\n{payload}").into_bytes()
+}