added some comments to address

src/lib.rs

@@ -6,7 +6,7 @@ use base64::{engine::general_purpose, Engine as _};
 #[derive(Clone, Deserialize, Debug, Serialize)]
 pub struct Token {
     pub user_id: String,
-    pub scope: String
+    pub scope: String // I don't really know what this means?
 }
 
 pub struct SignedToken {
@@ -21,7 +21,6 @@ impl Token {
     }
 }
 
-
 pub fn sign(token: &Token, private_key: &SigningKey) -> SignedToken {
     let issued_at = 1710000000; // example timestamp
     let data = (&token, issued_at);
@@ -39,11 +38,12 @@ pub fn verify(signed_token: &SignedToken, public_key: &VerifyingKey) -> Result<(
     let data = (&signed_token.token, signed_token.issued_at);
     let bytes = serde_json::to_vec(&data).unwrap();
 
-    // let sig_bytes = signed_token.signature.as_bytes();
+    // converts from base64
     let sig_bytes = general_purpose::STANDARD
         .decode(&signed_token.signature)
         .map_err(|e| e.to_string())?;
 
+    // can we guarantee length of 64?
     let sig_array: [u8; 64] = sig_bytes
         .try_into()
         .map_err(|_| "invalid signature length".to_string())?;
@@ -66,7 +66,7 @@ mod tests {
     use super::*;
 
     #[test]
-    fn test1() {
+    fn test_happy_path() {
         assert_eq!(4, 4);
 
          let json_string = r#"{