diff --git a/deltachat-ffi/src/lib.rs b/deltachat-ffi/src/lib.rs
index 09fac3f1e..3948ecd61 100644
--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
@@ -4460,7 +4460,7 @@ mod jsonrpc {
         }
 
         let cmd_api =
-            deltachat_jsonrpc::api::CommandApi::new_from_arc((*account_manager).inner.clone());
+            deltachat_jsonrpc::api::CommandApi::from_arc((*account_manager).inner.clone());
 
         let (request_handle, receiver) = RpcClient::new();
         let handle = RpcSession::new(request_handle, cmd_api);
diff --git a/deltachat-jsonrpc/Cargo.toml b/deltachat-jsonrpc/Cargo.toml
index f28cb8dd9..5666489dd 100644
--- a/deltachat-jsonrpc/Cargo.toml
+++ b/deltachat-jsonrpc/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "deltachat-jsonrpc"
 version = "1.86.0"
+description = "DeltaChat JSON-RPC API"
 authors = ["Delta Chat Developers (ML) <delta@codespeak.net>"]
 edition = "2021"
 default-run = "deltachat-jsonrpc-server"
diff --git a/deltachat-jsonrpc/src/api/events.rs b/deltachat-jsonrpc/src/api/events.rs
index 57f19b7e1..ad0fb5faf 100644
--- a/deltachat-jsonrpc/src/api/events.rs
+++ b/deltachat-jsonrpc/src/api/events.rs
@@ -62,8 +62,9 @@ pub fn event_to_json_rpc_notification(event: Event) -> Value {
         } => (json!(msg_id), json!(status_update_serial)),
     };
 
+    let id: EventTypeName = event.typ.into();
     json!({
-        "id": event_type_to_string(event.typ),
+        "id": id,
         "contextId": event.id,
         "field1": field1,
         "field2": field2
@@ -103,38 +104,40 @@ pub enum EventTypeName {
     WebxdcStatusUpdate,
 }
 
-fn event_type_to_string(event: EventType) -> EventTypeName {
-    use EventTypeName::*;
-    match event {
-        EventType::Info(_) => Info,
-        EventType::SmtpConnected(_) => SmtpConnected,
-        EventType::ImapConnected(_) => ImapConnected,
-        EventType::SmtpMessageSent(_) => SmtpMessageSent,
-        EventType::ImapMessageDeleted(_) => ImapMessageDeleted,
-        EventType::ImapMessageMoved(_) => ImapMessageMoved,
-        EventType::NewBlobFile(_) => NewBlobFile,
-        EventType::DeletedBlobFile(_) => DeletedBlobFile,
-        EventType::Warning(_) => Warning,
-        EventType::Error(_) => Error,
-        EventType::ErrorSelfNotInGroup(_) => ErrorSelfNotInGroup,
-        EventType::MsgsChanged { .. } => MsgsChanged,
-        EventType::IncomingMsg { .. } => IncomingMsg,
-        EventType::MsgsNoticed(_) => MsgsNoticed,
-        EventType::MsgDelivered { .. } => MsgDelivered,
-        EventType::MsgFailed { .. } => MsgFailed,
-        EventType::MsgRead { .. } => MsgRead,
-        EventType::ChatModified(_) => ChatModified,
-        EventType::ChatEphemeralTimerModified { .. } => ChatEphemeralTimerModified,
-        EventType::ContactsChanged(_) => ContactsChanged,
-        EventType::LocationChanged(_) => LocationChanged,
-        EventType::ConfigureProgress { .. } => ConfigureProgress,
-        EventType::ImexProgress(_) => ImexProgress,
-        EventType::ImexFileWritten(_) => ImexFileWritten,
-        EventType::SecurejoinInviterProgress { .. } => SecurejoinInviterProgress,
-        EventType::SecurejoinJoinerProgress { .. } => SecurejoinJoinerProgress,
-        EventType::ConnectivityChanged => ConnectivityChanged,
-        EventType::SelfavatarChanged => SelfavatarChanged,
-        EventType::WebxdcStatusUpdate { .. } => WebxdcStatusUpdate,
+impl From<EventType> for EventTypeName {
+    fn from(event: EventType) -> Self {
+        use EventTypeName::*;
+        match event {
+            EventType::Info(_) => Info,
+            EventType::SmtpConnected(_) => SmtpConnected,
+            EventType::ImapConnected(_) => ImapConnected,
+            EventType::SmtpMessageSent(_) => SmtpMessageSent,
+            EventType::ImapMessageDeleted(_) => ImapMessageDeleted,
+            EventType::ImapMessageMoved(_) => ImapMessageMoved,
+            EventType::NewBlobFile(_) => NewBlobFile,
+            EventType::DeletedBlobFile(_) => DeletedBlobFile,
+            EventType::Warning(_) => Warning,
+            EventType::Error(_) => Error,
+            EventType::ErrorSelfNotInGroup(_) => ErrorSelfNotInGroup,
+            EventType::MsgsChanged { .. } => MsgsChanged,
+            EventType::IncomingMsg { .. } => IncomingMsg,
+            EventType::MsgsNoticed(_) => MsgsNoticed,
+            EventType::MsgDelivered { .. } => MsgDelivered,
+            EventType::MsgFailed { .. } => MsgFailed,
+            EventType::MsgRead { .. } => MsgRead,
+            EventType::ChatModified(_) => ChatModified,
+            EventType::ChatEphemeralTimerModified { .. } => ChatEphemeralTimerModified,
+            EventType::ContactsChanged(_) => ContactsChanged,
+            EventType::LocationChanged(_) => LocationChanged,
+            EventType::ConfigureProgress { .. } => ConfigureProgress,
+            EventType::ImexProgress(_) => ImexProgress,
+            EventType::ImexFileWritten(_) => ImexFileWritten,
+            EventType::SecurejoinInviterProgress { .. } => SecurejoinInviterProgress,
+            EventType::SecurejoinJoinerProgress { .. } => SecurejoinJoinerProgress,
+            EventType::ConnectivityChanged => ConnectivityChanged,
+            EventType::SelfavatarChanged => SelfavatarChanged,
+            EventType::WebxdcStatusUpdate { .. } => WebxdcStatusUpdate,
+        }
     }
 }
 
diff --git a/deltachat-jsonrpc/src/api/mod.rs b/deltachat-jsonrpc/src/api/mod.rs
index c9c20f17f..bf1cb122e 100644
--- a/deltachat-jsonrpc/src/api/mod.rs
+++ b/deltachat-jsonrpc/src/api/mod.rs
@@ -41,7 +41,7 @@ impl CommandApi {
     }
 
     #[allow(dead_code)]
-    pub fn new_from_arc(accounts: Arc<RwLock<Accounts>>) -> Self {
+    pub fn from_arc(accounts: Arc<RwLock<Accounts>>) -> Self {
         CommandApi { accounts }
     }
 
@@ -258,7 +258,7 @@ impl CommandApi {
             query_contact_id.map(ContactId::new),
         )
         .await?;
-        let mut l: Vec<ChatListEntry> = Vec::new();
+        let mut l: Vec<ChatListEntry> = Vec::with_capacity(list.len());
         for i in 0..list.len() {
             l.push(ChatListEntry(
                 list.get_chat_id(i)?.to_u32(),
@@ -275,8 +275,9 @@ impl CommandApi {
     ) -> Result<HashMap<u32, ChatListItemFetchResult>> {
         // todo custom json deserializer for ChatListEntry?
         let ctx = self.get_context(account_id).await?;
-        let mut result: HashMap<u32, ChatListItemFetchResult> = HashMap::new();
-        for (_i, entry) in entries.iter().enumerate() {
+        let mut result: HashMap<u32, ChatListItemFetchResult> =
+            HashMap::with_capacity(entries.len());
+        for entry in entries.iter() {
             result.insert(
                 entry.0,
                 match get_chat_list_item_by_id(&ctx, entry).await {
@@ -301,7 +302,7 @@ impl CommandApi {
         chat_id: u32,
     ) -> Result<FullChat> {
         let ctx = self.get_context(account_id).await?;
-        FullChat::from_dc_chat_id(&ctx, chat_id).await
+        FullChat::try_from_dc_chat_id(&ctx, chat_id).await
     }
 
     async fn accept_chat(&self, account_id: u32, chat_id: u32) -> Result<()> {
diff --git a/deltachat-jsonrpc/src/api/types/account.rs b/deltachat-jsonrpc/src/api/types/account.rs
index 7bb6d3bbc..eeebc991f 100644
--- a/deltachat-jsonrpc/src/api/types/account.rs
+++ b/deltachat-jsonrpc/src/api/types/account.rs
@@ -9,7 +9,6 @@ use super::color_int_to_hex_string;
 #[derive(Serialize, TypeDef)]
 #[serde(tag = "type")]
 pub enum Account {
-    //#[serde(rename_all = "camelCase")]
     Configured {
         id: u32,
         display_name: Option<String>,
diff --git a/deltachat-jsonrpc/src/api/types/chat.rs b/deltachat-jsonrpc/src/api/types/chat.rs
index 20e04b2fc..33a2d332e 100644
--- a/deltachat-jsonrpc/src/api/types/chat.rs
+++ b/deltachat-jsonrpc/src/api/types/chat.rs
@@ -35,13 +35,13 @@ pub struct FullChat {
 }
 
 impl FullChat {
-    pub async fn from_dc_chat_id(context: &Context, chat_id: u32) -> Result<Self> {
+    pub async fn try_from_dc_chat_id(context: &Context, chat_id: u32) -> Result<Self> {
         let rust_chat_id = ChatId::new(chat_id);
         let chat = Chat::load_from_db(context, rust_chat_id).await?;
 
         let contact_ids = get_chat_contacts(context, rust_chat_id).await?;
 
-        let mut contacts = Vec::new();
+        let mut contacts = Vec::with_capacity(contact_ids.len());
 
         for contact_id in &contact_ids {
             contacts.push(