Add NIP-B0 support

README.md

@@ -126,7 +126,7 @@ Learn more about `rust-nostr` at <https://rust-nostr.org>.
 |     ✅     | [98 - HTTP Auth](https://github.com/nostr-protocol/nips/blob/master/98.md)                                      |
 |     ❌     | [99 - Classified Listings](https://github.com/nostr-protocol/nips/blob/master/99.md)                            |
 |     ✅     | [A0 - Voice Messages](https://github.com/nostr-protocol/nips/blob/master/A0.md)                                 |
-|     ❌     | [B0 - Web Bookmarks](https://github.com/nostr-protocol/nips/blob/master/B0.md)                                  |
+|     ✅     | [B0 - Web Bookmarks](https://github.com/nostr-protocol/nips/blob/master/B0.md)                                  |
 |     ✅     | [B7 - Blossom](https://github.com/nostr-protocol/nips/blob/master/B7.md)                                        |
 |     ✅     | [C0 - Code Snippets](https://github.com/nostr-protocol/nips/blob/master/C0.md)                                  |
 |     ✅     | [C7 - Chats](https://github.com/nostr-protocol/nips/blob/master/C7.md)                                          |

crates/nostr/CHANGELOG.md

@@ -35,6 +35,7 @@
 
 ### Added
 
+- Add NIP-B0 support (https://github.com/rust-nostr/nostr/pull/1077)
 - Add NIP-7D support (https://github.com/rust-nostr/nostr/pull/1071)
 - Add NIP-C7 support (https://github.com/rust-nostr/nostr/pull/1067)
 - Implement `ToBech32` trait for `Nip21`

crates/nostr/src/event/builder.rs

@@ -1945,6 +1945,14 @@ impl EventBuilder {
 
         Self::new(Kind::Comment, content).tags(tags)
     }
+
+    /// Web Bookmark
+    ///
+    /// <https://github.com/nostr-protocol/nips/blob/master/B0.md>
+    #[inline]
+    pub fn web_bookmark(web_bookmark: WebBookmark) -> Self {
+        web_bookmark.to_event_builder()
+    }
 }
 
 fn has_nostr_event_uri(content: &str, event_id: &EventId) -> bool {

crates/nostr/src/event/kind.rs

@@ -167,6 +167,7 @@ kind_variants! {
     PollResponse => 1018, "Poll response", "<https://github.com/nostr-protocol/nips/blob/master/88.md>",
     ChatMessage => 9, "Chat Message", "<https://github.com/nostr-protocol/nips/blob/master/C7.md>",
     Thread => 11, "Thread", "<https://github.com/nostr-protocol/nips/blob/master/7D.md>",
+    WebBookmark => 39701, "Web Bookmark", "<https://github.com/nostr-protocol/nips/blob/master/B0.md>",
 }
 
 impl PartialEq for Kind {

crates/nostr/src/nips/mod.rs

@@ -55,4 +55,5 @@ pub mod nip94;
 pub mod nip96;
 #[cfg(feature = "nip98")]
 pub mod nip98;
+pub mod nipb0;
 pub mod nipc0;

crates/nostr/src/nips/nipb0.rs

@@ -0,0 +1,94 @@
+// Copyright (c) 2022-2023 Yuki Kishimoto
+// Copyright (c) 2023-2025 Rust Nostr Developers
+// Distributed under the MIT software license
+
+//! NIPB0: Web Bookmarks
+//!
+//! <https://github.com/nostr-protocol/nips/blob/master/B0.md>
+
+use alloc::string::String;
+use alloc::vec::Vec;
+
+use crate::{EventBuilder, Kind, Tag, TagStandard, Timestamp};
+
+/// Web Bookmark
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct WebBookmark {
+    /// Description of the web bookmark.
+    pub description: String,
+    /// URL of the web bookmark.
+    pub url: String,
+    /// Timestamp when the web bookmark was first published.
+    pub published_at: Option<Timestamp>,
+    /// Title of the web bookmark.
+    pub title: Option<String>,
+    /// Hashtags for the web bookmark.
+    pub hashtags: Vec<String>,
+}
+
+impl WebBookmark {
+    /// Create a new web bookmark
+    #[inline]
+    pub fn new<T>(description: T, url: T) -> Self
+    where
+        T: Into<String>,
+    {
+        Self {
+            description: description.into(),
+            url: url.into(),
+            published_at: None,
+            title: None,
+            hashtags: Vec::new(),
+        }
+    }
+
+    /// Set the title.
+    #[inline]
+    pub fn title<T>(mut self, title: T) -> Self
+    where
+        T: Into<String>,
+    {
+        self.title = Some(title.into());
+        self
+    }
+
+    /// Set the timestamp at which the web bookmark was published.
+    #[inline]
+    pub fn published_at(mut self, timestamp: Timestamp) -> Self {
+        self.published_at = Some(timestamp);
+        self
+    }
+
+    /// Add a hashtag/tag.
+    pub fn hashtags<T>(mut self, hashtag: T) -> Self
+    where
+        T: Into<String>,
+    {
+        let hashtag = hashtag.into().to_lowercase();
+        if !self.hashtags.contains(&hashtag) {
+            self.hashtags.push(hashtag);
+        }
+        self
+    }
+
+    /// Convert the web bookmark to an event builder
+    #[allow(clippy::wrong_self_convention)]
+    pub(crate) fn to_event_builder(self) -> EventBuilder {
+        let mut tags: Vec<Tag> = vec![TagStandard::Identifier(self.url).into()];
+
+        let mut add_if_some = |tag: Option<TagStandard>| {
+            if let Some(tag) = tag {
+                tags.push(tag.into());
+            }
+        };
+
+        add_if_some(self.published_at.map(TagStandard::PublishedAt));
+        add_if_some(self.title.map(TagStandard::Title));
+
+        for hashtag in self.hashtags.into_iter() {
+            tags.push(TagStandard::Hashtag(hashtag).into());
+        }
+
+        EventBuilder::new(Kind::WebBookmark, self.description).tags(tags)
+    }
+}

crates/nostr/src/prelude.rs

@@ -77,6 +77,7 @@ pub use crate::nips::nip94::{self, *};
 pub use crate::nips::nip96::{self, *};
 #[cfg(feature = "nip98")]
 pub use crate::nips::nip98::{self, *};
+pub use crate::nips::nipb0::{self, *};
 pub use crate::nips::nipc0::{self, *};
 pub use crate::parser::{self, *};
 pub use crate::signer::{self, *};