nostr: add Tag::is_root method

Closes #431

Signed-off-by: Yuki Kishimoto <[email protected]>

Author: kasugamirai

CHANGELOG.md

@@ -5,6 +5,12 @@
 <!-- The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/), -->
 <!-- and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html). -->
 
+## [Unreleased]
+
+### Added
+
+* nostr: add `Tag::is_root` method ([Xiao Yu])
+
 ## [v0.31.0]
 
 ### Summary

bindings/nostr-ffi/src/event/tag.rs

@@ -408,6 +408,11 @@ impl Tag {
         }
     }
 
+    /// Check if `Tag` is an event `root`
+    pub fn is_root(&self) -> bool {
+        self.inner.is_root()
+    }
+
     /// Check if `Tag` is an event `reply`
     pub fn is_reply(&self) -> bool {
         self.inner.is_reply()

bindings/nostr-js/src/event/tag.rs

@@ -313,8 +313,16 @@ impl JsTag {
         }
     }
 
+    /// Check if `Tag` is an event `root`
+    #[inline]
+    #[wasm_bindgen(js_name = isRoot)]
+    pub fn is_root(&self) -> bool {
+        self.inner.is_root()
+    }
+
     /// Check if `Tag` is an event `reply`
     #[inline]
+    #[wasm_bindgen(js_name = isReply)]
     pub fn is_reply(&self) -> bool {
         self.inner.is_reply()
     }

crates/nostr/src/event/tag/mod.rs

@@ -277,6 +277,18 @@ impl Tag {
         Self::new_with_empty_cell(buf)
     }
 
+    /// Check if tag is an event `root`
+    #[inline]
+    pub fn is_root(&self) -> bool {
+        matches!(
+            self.as_standardized(),
+            Some(TagStandard::Event {
+                marker: Some(Marker::Root),
+                ..
+            })
+        )
+    }
+
     /// Check if tag is an event `reply`
     #[inline]
     pub fn is_reply(&self) -> bool {