diff --git a/Cargo.lock b/Cargo.lock
index 86ef48c1..70d7f4b4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1968,8 +1968,7 @@ dependencies = [
 [[package]]
 name = "ruma"
 version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "668031e3108d6a2cfbe6eca271d8698f4593440e71a44afdadcf67ce3cb93c1f"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "assign",
  "js_int",
@@ -1990,8 +1989,7 @@ dependencies = [
 [[package]]
 name = "ruma-api"
 version = "0.18.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f5f1843792b6749ec1ece62595cf99ad30bf9589c96bb237515235e71da396ea"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "bytes",
  "http",
@@ -2007,8 +2005,7 @@ dependencies = [
 [[package]]
 name = "ruma-api-macros"
 version = "0.18.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7b18abda5cca94178d08b622bca042e1cbb5eb7d4ebf3a2a81590a3bb3c57008"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2",
@@ -2019,8 +2016,7 @@ dependencies = [
 [[package]]
 name = "ruma-appservice-api"
 version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49369332a5f299e832e19661f92d49e08c345c3c6c4ab16e09cb31c5ff6da878"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "ruma-api",
  "ruma-common",
@@ -2034,8 +2030,7 @@ dependencies = [
 [[package]]
 name = "ruma-client-api"
 version = "0.12.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9568a222c12cf6220e751484ab78feec28071f85965113a5bb802936a2920ff0"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "assign",
  "bytes",
@@ -2055,8 +2050,7 @@ dependencies = [
 [[package]]
 name = "ruma-common"
 version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41d5b7605f58dc0d9cf1848cc7f1af2bae4e4bcd1d2b7a87bbb9864c8a785b91"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "indexmap",
  "js_int",
@@ -2071,8 +2065,7 @@ dependencies = [
 [[package]]
 name = "ruma-events"
 version = "0.24.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87801e1207cfebdee02e7997ebf181a1c9837260b78c1b8ce96b896a2bcb3763"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "indoc",
  "js_int",
@@ -2088,8 +2081,7 @@ dependencies = [
 [[package]]
 name = "ruma-events-macros"
 version = "0.24.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5da4498845347de88adf1b7da4578e2ca7355ad4ce47b0976f6594bacf958660"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2",
@@ -2100,8 +2092,7 @@ dependencies = [
 [[package]]
 name = "ruma-federation-api"
 version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa3d1db1a064ab26484df6ef5d96c384fc053022004f34d96c3b4939e13dc204"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "js_int",
  "ruma-api",
@@ -2116,8 +2107,7 @@ dependencies = [
 [[package]]
 name = "ruma-identifiers"
 version = "0.20.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb417d091e8dd5a633e4e5998231a156049d7fcc221045cfdc0642eb72067732"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "paste",
  "rand 0.8.4",
@@ -2131,8 +2121,7 @@ dependencies = [
 [[package]]
 name = "ruma-identifiers-macros"
 version = "0.20.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c708edad7f605638f26c951cbad7501fbf28ab01009e5ca65ea5a2db74a882b1"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "quote",
  "ruma-identifiers-validation",
@@ -2142,14 +2131,12 @@ dependencies = [
 [[package]]
 name = "ruma-identifiers-validation"
 version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42285e7fb5d5f2d5268e45bb683e36d5c6fd9fc1e11a4559ba3c3521f3bbb2cb"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 
 [[package]]
 name = "ruma-identity-service-api"
 version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e76e66e24f2d5a31511fbf6c79e79f67a7a6a98ebf48d72381b7d5bb6c09f035"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "js_int",
  "ruma-api",
@@ -2162,8 +2149,7 @@ dependencies = [
 [[package]]
 name = "ruma-push-gateway-api"
 version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ef5b29da7065efc5b1e1a8f61add7543c9ab4ecce5ee0dd1c1c5ecec83fbeec"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "js_int",
  "ruma-api",
@@ -2178,8 +2164,7 @@ dependencies = [
 [[package]]
 name = "ruma-serde"
 version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b2b22aae842e7ecda695e42b7b39d4558959d9d9a27acc2a16acf4f4f7f00c3"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "bytes",
  "form_urlencoded",
@@ -2193,8 +2178,7 @@ dependencies = [
 [[package]]
 name = "ruma-serde-macros"
 version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "243e9bef188b08f94c79bc2f8fd1eb307a9e636b2b8e4571acf8c7be16381d28"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2",
@@ -2205,8 +2189,7 @@ dependencies = [
 [[package]]
 name = "ruma-signatures"
 version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4a4f64027165b59500162d10d435b1253898bf3ad4f5002cb0d56913fe7f76d7"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "base64 0.13.0",
  "ed25519-dalek",
@@ -2223,8 +2206,7 @@ dependencies = [
 [[package]]
 name = "ruma-state-res"
 version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "518c1afbddfcc5ffac8818a5cf0902709e6eca11aca8f24f6479df6f0601f1ba"
+source = "git+https://github.com/ruma/ruma?rev=a6a1224652912a957b09f136ec5da2686be6e0e2#a6a1224652912a957b09f136ec5da2686be6e0e2"
 dependencies = [
  "itertools 0.10.1",
  "js_int",
diff --git a/Cargo.toml b/Cargo.toml
index 04887d0f..593a1fd3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,8 +18,8 @@ edition = "2018"
 rocket = { version = "0.5.0-rc.1", features = ["tls"] } # Used to handle requests
 
 # Used for matrix spec type definitions and helpers
-ruma = { version = "0.4.0", features = ["compat", "rand", "appservice-api-c", "client-api", "federation-api", "push-gateway-api-c", "state-res", "unstable-pre-spec", "unstable-exhaustive-types"] }
-#ruma = { git = "https://github.com/ruma/ruma", rev = "f5ab038e22421ed338396ece977b6b2844772ced", features = ["compat", "rand", "appservice-api-c", "client-api", "federation-api", "push-gateway-api-c", "state-res", "unstable-pre-spec", "unstable-exhaustive-types"] }
+#ruma = { version = "0.4.0", features = ["compat", "rand", "appservice-api-c", "client-api", "federation-api", "push-gateway-api-c", "state-res", "unstable-pre-spec", "unstable-exhaustive-types"] }
+ruma = { git = "https://github.com/ruma/ruma", rev = "a6a1224652912a957b09f136ec5da2686be6e0e2", features = ["compat", "rand", "appservice-api-c", "client-api", "federation-api", "push-gateway-api-c", "state-res", "unstable-pre-spec", "unstable-exhaustive-types"] }
 #ruma = { git = "https://github.com/timokoesters/ruma", rev = "50c1db7e0a3a21fc794b0cce3b64285a4c750c71", features = ["compat", "rand", "appservice-api-c", "client-api", "federation-api", "push-gateway-api-c", "state-res", "unstable-pre-spec", "unstable-exhaustive-types"] }
 #ruma = { path = "../ruma/crates/ruma", features = ["compat", "rand", "appservice-api-c", "client-api", "federation-api", "push-gateway-api-c", "state-res", "unstable-pre-spec", "unstable-exhaustive-types"] }
 
diff --git a/src/client_server/membership.rs b/src/client_server/membership.rs
index 52e074c2..01c19c21 100644
--- a/src/client_server/membership.rs
+++ b/src/client_server/membership.rs
@@ -976,10 +976,10 @@ pub(crate) async fn invite_helper<'a>(
 
             let auth_check = state_res::auth_check(
                 &room_version,
-                &Arc::new(pdu.clone()),
+                &pdu,
                 create_prev_event,
-                None, // TODO: third_party_invite
-                |k, s| auth_events.get(&(k.clone(), s.to_owned())).map(Arc::clone),
+                None::<PduEvent>, // TODO: third_party_invite
+                |k, s| auth_events.get(&(k.clone(), s.to_owned())),
             )
             .map_err(|e| {
                 error!("{:?}", e);
diff --git a/src/database/rooms.rs b/src/database/rooms.rs
index 42454833..51023ba9 100644
--- a/src/database/rooms.rs
+++ b/src/database/rooms.rs
@@ -252,12 +252,7 @@ impl Rooms {
                 return Ok(HashMap::new());
             };
 
-        let auth_events = state_res::auth_types_for_event(
-            kind,
-            sender,
-            state_key.map(|s| s.to_string()),
-            content.clone(),
-        );
+        let auth_events = state_res::auth_types_for_event(kind, sender, state_key, &content);
 
         let mut sauthevents = auth_events
             .into_iter()
@@ -2046,10 +2041,10 @@ impl Rooms {
 
         let auth_check = state_res::auth_check(
             &room_version,
-            &Arc::new(pdu.clone()),
+            &pdu,
             create_prev_event,
-            None, // TODO: third_party_invite
-            |k, s| auth_events.get(&(k.clone(), s.to_owned())).map(Arc::clone),
+            None::<PduEvent>, // TODO: third_party_invite
+            |k, s| auth_events.get(&(k.clone(), s.to_owned())),
         )
         .map_err(|e| {
             error!("{:?}", e);
diff --git a/src/pdu.rs b/src/pdu.rs
index 1016fe66..8623b1a0 100644
--- a/src/pdu.rs
+++ b/src/pdu.rs
@@ -260,37 +260,47 @@ impl state_res::Event for PduEvent {
     fn sender(&self) -> &UserId {
         &self.sender
     }
-    fn kind(&self) -> EventType {
-        self.kind.clone()
+
+    fn event_type(&self) -> &EventType {
+        &self.kind
     }
 
-    fn content(&self) -> serde_json::Value {
-        self.content.clone()
+    fn content(&self) -> &serde_json::Value {
+        &self.content
     }
+
     fn origin_server_ts(&self) -> MilliSecondsSinceUnixEpoch {
         MilliSecondsSinceUnixEpoch(self.origin_server_ts)
     }
-    fn state_key(&self) -> Option<String> {
-        self.state_key.clone()
+
+    fn state_key(&self) -> Option<&str> {
+        self.state_key.as_deref()
     }
-    fn prev_events(&self) -> Vec<EventId> {
-        self.prev_events.to_vec()
+
+    fn prev_events(&self) -> Box<dyn DoubleEndedIterator<Item = &EventId> + '_> {
+        Box::new(self.prev_events.iter())
     }
+
     fn depth(&self) -> &UInt {
         &self.depth
     }
-    fn auth_events(&self) -> Vec<EventId> {
-        self.auth_events.to_vec()
+
+    fn auth_events(&self) -> Box<dyn DoubleEndedIterator<Item = &EventId> + '_> {
+        Box::new(self.auth_events.iter())
     }
+
     fn redacts(&self) -> Option<&EventId> {
         self.redacts.as_ref()
     }
+
     fn hashes(&self) -> &EventHash {
         &self.hashes
     }
+
     fn signatures(&self) -> BTreeMap<Box<ServerName>, BTreeMap<ruma::ServerSigningKeyId, String>> {
         self.signatures.clone()
     }
+
     fn unsigned(&self) -> &BTreeMap<String, serde_json::Value> {
         &self.unsigned
     }
diff --git a/src/server_server.rs b/src/server_server.rs
index c27ea228..89b9c5cf 100644
--- a/src/server_server.rs
+++ b/src/server_server.rs
@@ -1065,23 +1065,22 @@ pub(crate) async fn handle_incoming_pdu<'a>(
         }
     }
 
-    let sorted =
-        state_res::StateResolution::lexicographical_topological_sort(dbg!(&graph), |event_id| {
-            // This return value is the key used for sorting events,
-            // events are then sorted by power level, time,
-            // and lexically by event_id.
-            println!("{}", event_id);
-            Ok((
-                0,
-                MilliSecondsSinceUnixEpoch(
-                    eventid_info
-                        .get(event_id)
-                        .map_or_else(|| uint!(0), |info| info.0.origin_server_ts),
-                ),
-                ruma::event_id!("$notimportant"),
-            ))
-        })
-        .map_err(|_| "Error sorting prev events".to_owned())?;
+    let sorted = state_res::lexicographical_topological_sort(dbg!(&graph), |event_id| {
+        // This return value is the key used for sorting events,
+        // events are then sorted by power level, time,
+        // and lexically by event_id.
+        println!("{}", event_id);
+        Ok((
+            0,
+            MilliSecondsSinceUnixEpoch(
+                eventid_info
+                    .get(event_id)
+                    .map_or_else(|| uint!(0), |info| info.0.origin_server_ts),
+            ),
+            ruma::event_id!("$notimportant"),
+        ))
+    })
+    .map_err(|_| "Error sorting prev events".to_owned())?;
 
     let mut errors = 0;
     for prev_id in dbg!(sorted) {
@@ -1280,8 +1279,8 @@ fn handle_outlier_pdu<'a>(
             &room_version,
             &incoming_pdu,
             previous_create,
-            None, // TODO: third party invite
-            |k, s| auth_events.get(&(k.clone(), s.to_owned())).map(Arc::clone),
+            None::<PduEvent>, // TODO: third party invite
+            |k, s| auth_events.get(&(k.clone(), s.to_owned())),
         )
         .map_err(|_e| "Auth check failed".to_string())?
         {
@@ -1437,8 +1436,7 @@ async fn upgrade_outlier_to_timeline_pdu(
                 fork_states.push(state);
             }
 
-            state_at_incoming_event = match state_res::StateResolution::resolve(
-                &room_id,
+            state_at_incoming_event = match state_res::resolve(
                 room_version_id,
                 &fork_states,
                 auth_chain_sets,
@@ -1566,8 +1564,8 @@ async fn upgrade_outlier_to_timeline_pdu(
     let check_result = state_res::event_auth::auth_check(
         &room_version,
         &incoming_pdu,
-        previous_create.clone(),
-        None, // TODO: third party invite
+        previous_create.as_deref(),
+        None::<PduEvent>, // TODO: third party invite
         |k, s| {
             db.rooms
                 .get_shortstatekey(&k, &s)
@@ -1650,9 +1648,9 @@ async fn upgrade_outlier_to_timeline_pdu(
     let soft_fail = !state_res::event_auth::auth_check(
         &room_version,
         &incoming_pdu,
-        previous_create,
-        None,
-        |k, s| auth_events.get(&(k.clone(), s.to_owned())).map(Arc::clone),
+        previous_create.as_deref(),
+        None::<PduEvent>,
+        |k, s| auth_events.get(&(k.clone(), s.to_owned())),
     )
     .map_err(|_e| "Auth check failed.".to_owned())?;
 
@@ -1795,8 +1793,7 @@ async fn upgrade_outlier_to_timeline_pdu(
                 .collect::<Result<Vec<_>>>()
                 .map_err(|_| "Failed to get_statekey_from_short.".to_owned())?;
 
-            let state = match state_res::StateResolution::resolve(
-                &room_id,
+            let state = match state_res::resolve(
                 room_version_id,
                 fork_states,
                 auth_chain_sets,
@@ -2773,10 +2770,10 @@ pub fn create_join_event_template_route(
 
     let auth_check = state_res::auth_check(
         &room_version,
-        &Arc::new(pdu.clone()),
-        create_prev_event,
-        None, // TODO: third_party_invite
-        |k, s| auth_events.get(&(k.clone(), s.to_owned())).map(Arc::clone),
+        &pdu,
+        create_prev_event.as_deref(),
+        None::<PduEvent>, // TODO: third_party_invite
+        |k, s| auth_events.get(&(k.clone(), s.to_owned())),
     )
     .map_err(|e| {
         error!("{:?}", e);