add url address type

src/addressing.rs

@@ -15,6 +15,7 @@ pub enum Address {
     Hash(Hash),
     Uuid(Uuid),
     Attribute(String),
+    Url(String),
 }
 
 // multihash KangarooTwelve
@@ -29,6 +30,7 @@ impl Address {
             Self::Hash(hash) => (KANGAROO_TWELVE, hash.0.clone()),
             Self::Uuid(uuid) => (IDENTITY, [vec![b'U'], uuid.as_bytes().to_vec()].concat()),
             Self::Attribute(attribute) => (IDENTITY, [&[b'A'], attribute.as_bytes()].concat()),
+            Self::Url(url) => (IDENTITY, [&[b'X'], url.as_bytes()].concat()),
         };
 
         let mut result = Cursor::new(vec![0u8; 0]);
@@ -59,6 +61,7 @@ impl Address {
                             digest_content.as_slice(),
                         )?)),
                         b'A' => Ok(Self::Attribute(String::from_utf8(digest_content)?)),
+                        b'X' => Ok(Self::Url(String::from_utf8(digest_content)?)),
                         _ => Err(anyhow!("Unknown identity marker.")),
                     }
                 }
@@ -114,7 +117,11 @@ impl FromStr for Address {
 
 impl std::fmt::Display for Address {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "{}", b58_encode(self.encode().map_err(|_| std::fmt::Error)?))
+        write!(
+            f,
+            "{}",
+            b58_encode(self.encode().map_err(|_| std::fmt::Error)?)
+        )
     }
 }
 
@@ -175,4 +182,17 @@ mod tests {
 
         assert_eq!(addr, decoded.unwrap());
     }
+
+    #[test]
+    fn test_url_codec() {
+        let addr = Address::Url(String::from("https://upendproject.net"));
+
+        let encoded = addr.encode();
+        assert!(encoded.is_ok());
+
+        let decoded = Address::decode(&encoded.unwrap());
+        assert!(decoded.is_ok());
+
+        assert_eq!(addr, decoded.unwrap());
+    }
 }