diff --git a/h3/src/error2/error.rs b/h3/src/error2/error.rs
index 5f7fbdd1..fb8e2f90 100644
--- a/h3/src/error2/error.rs
+++ b/h3/src/error2/error.rs
@@ -59,6 +59,54 @@ pub enum StreamError {
     ConnectionError(ConnectionError),
 }
 
+/// This enum represents a stream error
+#[derive(Debug, Clone)]
+#[non_exhaustive]
+pub enum ServerStreamError {
+    /// The error occurred on the stream
+    #[non_exhaustive]
+    StreamError {
+        /// The error code
+        code: NewCode,
+        /// The error reason
+        reason: &'static str,
+    },
+    /// The error occurred on the connection
+    #[non_exhaustive]
+    ConnectionError(ConnectionError),
+    #[non_exhaustive]
+    /// The received header block is too big
+    /// The Request has been answered with a 431 Request Header Fields Too Large
+    HeaderTooBig { actual_size: u64, max_size: u64 },
+}
+
+impl std::fmt::Display for ServerStreamError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            ServerStreamError::StreamError { code, reason } => {
+                write!(f, "Stream error: {:?} - {}", code, reason)
+            }
+            ServerStreamError::ConnectionError(err) => write!(f, "Connection error: {}", err),
+            ServerStreamError::HeaderTooBig { actual_size, max_size } => write!(
+                f,
+                "Header too big: actual size: {}, max size: {}",
+                actual_size, max_size
+            ),
+        }
+    }
+}
+
+impl std::error::Error for ServerStreamError {}
+
+impl From<StreamError> for ServerStreamError {
+    fn from(err: StreamError) -> Self {
+        match err {
+            StreamError::StreamError { code, reason } => ServerStreamError::StreamError { code, reason },
+            StreamError::ConnectionError(err) => ServerStreamError::ConnectionError(err),
+        }
+    }
+}
+
 impl std::fmt::Display for ConnectionError {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         match self {
diff --git a/h3/src/error2/internal_error.rs b/h3/src/error2/internal_error.rs
index cdd3c014..2f68d49b 100644
--- a/h3/src/error2/internal_error.rs
+++ b/h3/src/error2/internal_error.rs
@@ -15,8 +15,10 @@ pub enum ErrorScope {
 /// to represent errors, which have not yet affected the connection or stream state
 ///
 /// This error type is generated from the error types of h3s submodules or by the modules itself.
+/// 
+/// This error type is used in functions which handle a http3 request stream
 #[derive(Debug, Clone, Hash)]
-pub struct InternalError {
+pub struct InternalRequestStreamError {
     /// The error scope
     scope: ErrorScope,
     /// The error code
@@ -24,3 +26,18 @@ pub struct InternalError {
     /// The error message
     message: &'static str,
 }
+
+
+/// This error type represents an internal error type, which is used
+/// to represent errors, which have not yet affected the connection state
+/// 
+/// This error type is generated from the error types of h3s submodules or by the modules itself.
+/// 
+/// This error type is used in functions which handle a http3 connection state 
+#[derive(Debug, Clone, Hash)]
+pub struct InternalConnectionError {
+    /// The error code
+    code: Code,
+    /// The error message
+    message: &'static str,
+}
\ No newline at end of file
diff --git a/h3/src/error2/traits.rs b/h3/src/error2/traits.rs
index 3f7c257a..83a6fabe 100644
--- a/h3/src/error2/traits.rs
+++ b/h3/src/error2/traits.rs
@@ -1,23 +1,32 @@
 //! Defines error traits
 
-use crate::config::Config;
+use crate::{config::Config, shared_state::ConnectionState2};
 
-use super::{internal_error::InternalError, ConnectionError};
+use super::{codes::NewCode, internal_error::InternalRequestStreamError, ConnectionError};
 
 /// This trait is implemented for all types which can close the connection
-pub(crate) trait CloseConnection {
+pub(crate) trait CloseConnection: ConnectionState2 {
     /// Close the connection
-    fn handle_error(&mut self, internal_error: InternalError) -> ConnectionError {
+    fn handle_connection_error(
+        &mut self,
+        internal_error: InternalRequestStreamError,
+    ) -> ConnectionError {
+        
+        //self.maybe_conn_error(error)
         todo!()
     }
+
+    fn close_connection<T: AsRef<str>>(code: &NewCode, reason: T) -> ();
 }
 
-pub(crate) trait CloseStream {
-    fn handle_error(&mut self, internal_error: InternalError, config: &Config) -> ConnectionError {
+pub(crate) trait CloseStream: CloseConnection {
+    fn handle_stream_error(
+        &mut self,
+        internal_error: InternalRequestStreamError,
+        config: &Config,
+    ) -> ConnectionError {
         todo!()
     }
 
     fn close_stream() -> ();
-
-    fn close_connection() -> ();
 }