nostr: add MissingPartialEvent struct

crates/nostr/src/event/mod.rs

@@ -23,7 +23,7 @@ pub mod unsigned;
 pub use self::builder::EventBuilder;
 pub use self::id::EventId;
 pub use self::kind::Kind;
-pub use self::partial::PartialEvent;
+pub use self::partial::{MissingPartialEvent, PartialEvent};
 pub use self::tag::{Marker, Tag, TagKind};
 pub use self::unsigned::UnsignedEvent;
 #[cfg(feature = "std")]

crates/nostr/src/event/partial.rs

@@ -3,14 +3,16 @@
 
 //! Partial Event for fast deserialization and signature verification
 
+use alloc::string::String;
+use alloc::vec::Vec;
 use core::fmt;
 
 use bitcoin::secp256k1::schnorr::Signature;
 use bitcoin::secp256k1::{self, Message, Secp256k1, Verification, XOnlyPublicKey};
 
 #[cfg(feature = "std")]
 use crate::SECP256K1;
-use crate::{EventId, JsonUtil};
+use crate::{Event, EventId, JsonUtil, Kind, Tag, Timestamp};
 
 /// [`PartialEvent`] error
 #[derive(Debug)]
@@ -51,7 +53,7 @@ impl From<secp256k1::Error> for Error {
 /// Partial event
 #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
 pub struct PartialEvent {
-    /// Id
+    /// ID
     pub id: EventId,
     /// Author
     pub pubkey: XOnlyPublicKey,
@@ -76,8 +78,44 @@ impl PartialEvent {
         secp.verify_schnorr(&self.sig, &message, &self.pubkey)
             .map_err(|_| Error::InvalidSignature)
     }
+
+    /// Merge [`MissingPartialEvent`] and compose [`Event`]
+    pub fn merge(&self, missing: MissingPartialEvent) -> Event {
+        Event {
+            id: self.id,
+            pubkey: self.pubkey,
+            created_at: missing.created_at,
+            kind: missing.kind,
+            tags: missing.tags,
+            content: missing.content,
+            sig: self.sig,
+            #[cfg(feature = "nip03")]
+            ots: missing.ots,
+        }
+    }
 }
 
 impl JsonUtil for PartialEvent {
     type Err = Error;
 }
+
+/// Missing Partial event fields
+#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
+pub struct MissingPartialEvent {
+    /// Timestamp (seconds)
+    pub created_at: Timestamp,
+    /// Kind
+    pub kind: Kind,
+    /// Vector of [`Tag`]
+    pub tags: Vec<Tag>,
+    /// Content
+    pub content: String,
+    /// OpenTimestamps Attestations
+    #[cfg(feature = "nip03")]
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub ots: Option<String>,
+}
+
+impl JsonUtil for MissingPartialEvent {
+    type Err = Error;
+}

crates/nostr/src/lib.rs

@@ -47,7 +47,9 @@ pub use self::event::tag::{
     ExternalIdentity, HttpMethod, Identity, ImageDimensions, Marker, RelayMetadata, Report, Tag,
     TagKind,
 };
-pub use self::event::{Event, EventBuilder, EventId, Kind, PartialEvent, UnsignedEvent};
+pub use self::event::{
+    Event, EventBuilder, EventId, Kind, MissingPartialEvent, PartialEvent, UnsignedEvent,
+};
 pub use self::key::Keys;
 pub use self::message::{
     Alphabet, ClientMessage, Filter, RawRelayMessage, RelayMessage, SubscriptionId,