1 files changed, 48 insertions, 0 deletions
diff --git a/src/vapid/event.rs b/src/vapid/event.rs
new file mode 100644
index 0000000..af70ac2
--- /dev/null
+++ b/src/vapid/event.rs
@@ -0,0 +1,48 @@
+use base64::{Engine, engine::general_purpose::URL_SAFE};
+use p256::ecdsa::VerifyingKey;
+use serde::Serialize;
+
+use crate::event::{Instant, Sequenced};
+
+#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
+#[serde(tag = "event", rename_all = "snake_case")]
+pub enum Event {
+    Changed(Changed),
+}
+
+impl Sequenced for Event {
+    fn instant(&self) -> Instant {
+        match self {
+            Self::Changed(event) => event.instant(),
+        }
+    }
+}
+
+#[derive(Clone, Debug, Eq, PartialEq, serde::Serialize)]
+pub struct Changed {
+    #[serde(flatten)]
+    pub instant: Instant,
+    #[serde(serialize_with = "as_vapid_key")]
+    pub key: VerifyingKey,
+}
+
+impl From<Changed> for Event {
+    fn from(event: Changed) -> Self {
+        Self::Changed(event)
+    }
+}
+
+impl Sequenced for Changed {
+    fn instant(&self) -> Instant {
+        self.instant
+    }
+}
+
+fn as_vapid_key<S>(key: &VerifyingKey, serializer: S) -> Result<S::Ok, S::Error>
+where
+    S: serde::Serializer,
+{
+    let key = key.to_sec1_bytes();
+    let key = URL_SAFE.encode(key);
+    key.serialize(serializer)
+}