feat: add events function to set multiple event filter (#1607)

ethers-core/src/types/filter.rs

@@ -254,13 +254,21 @@ impl Filter {
         self
     }
 
-    /// given the event in string form, it hashes it and adds it to the topics to monitor
+    /// Given the event signature in string form, it hashes it and adds it to the topics to monitor
     #[must_use]
     pub fn event(self, event_name: &str) -> Self {
         let hash = H256::from(keccak256(event_name.as_bytes()));
         self.topic0(hash)
     }
 
+    /// Hashes all event signatures and sets them as array to topic0
+    #[must_use]
+    pub fn events(self, events: impl IntoIterator<Item = impl AsRef<[u8]>>) -> Self {
+        let events =
+            events.into_iter().map(|e| H256::from(keccak256(e.as_ref()))).collect::<Vec<_>>();
+        self.topic0(events)
+    }
+
     /// Sets topic0 (the event name for non-anonymous events)
     #[must_use]
     pub fn topic0<T: Into<Topic>>(mut self, topic: T) -> Self {
@@ -544,6 +552,12 @@ impl From<H256> for Topic {
     }
 }
 
+impl From<Vec<H256>> for ValueOrArray<H256> {
+    fn from(src: Vec<H256>) -> Self {
+        ValueOrArray::Array(src)
+    }
+}
+
 impl From<ValueOrArray<H256>> for Topic {
     fn from(src: ValueOrArray<H256>) -> Self {
         match src {