change MsgHandlerError

AI_prompt.md

@@ -176,3 +176,68 @@ my server REST API endpoint is sommpanion.yiem.cc/agent-fronent/api/v1/chat but
 I just placed my custom package for encode and decode message at ./src/msghandler.rs. smartsend() is for encoding and smartreceive() is for decoding. 
 you may also check the file /home/ton/docker-apps/sommpanion/msghandler/docs/walkthrough.md for more info about my package.
 You can test whether Dioxus webapp can be build using this command "dx bundle --web --release --debug-symbols=false" 
+
+
+
+
+
+
+
+
+
+
+I want to build similar webapp.
+My app should be built as client-side-rendering Dioxus-based (version 0.7+).
+I already build backend server and I intend to communicate with the webapp using json string that encode the following message envelop:
+{
+  "correlation_id": "a1b2c3d4...",
+  "msg_id": "e5f6g7h8...",
+  "timestamp": "2026-03-13T16:30:00.000Z",
+  "send_to": "",
+  "msg_purpose": "chat",
+  "sender_name": "chat-webapp",
+  "sender_id": "sender-uuid...",
+  "receiver_name": "agent-backend",
+  "receiver_id": "",
+  "reply_to": "",
+  "reply_to_msg_id": "",
+  "broker_url": "myservice.mydomain.com/subservice/api/v1/chat",
+  "metadata": {},
+  "payloads": [
+    {
+      "id": "payload-uuid...",
+      "dataname": "msg",
+      "payload_type": "text",
+      "transport": "direct",
+      "encoding": "base64",
+      "size": 20,
+      "data": "SGVsbG8hIEknIHRlbCB5b3UgSW4gZW5nbGlzaC4=",
+      "metadata": {"payload_bytes": 20}
+    },
+    {
+      "id": "payload-uuid...",
+      "dataname": "avatar",
+      "payload_type": "image",
+      "transport": "direct",
+      "encoding": "base64",
+      "size": 150000,
+      "data": "iVBORw0KGgoAAAANSUhEUgAA...",
+      "metadata": {"payload_bytes": 150000}
+    },
+    {
+      ...,
+      "payload_type": "text",
+      ...,
+    },
+    ...
+  ]
+}
+---
+I already have Rust file named msghandler.rs containing the following functions for the webapp to use:
+- smartsend() to encode the above message envelop into json string.
+- smartreceive() to decode json string back to message envelop.
+- the msghandler.rs walkthrough is at /home/ton/docker-apps/sommpanion/msghandler/docs/walkthrough.md
+The backend server REST API endpoint is "myservice.mydomain.com/subservice/api/v1/chat". I didn't run the server yet. 
+I already setup the project structure but you can modify the folder as you see fit. Can you implement the app? Use this command "dx bundle --web --release --debug-symbols=false" to check whether the project can be build.
+P.S. AI_prompt.md is for me to use. do not read.
+

Cargo.lock

@@ -906,6 +906,7 @@ dependencies = [
  "base64",
  "bytes",
  "encoding_rs",
+ "futures-channel",
  "futures-core",
  "futures-util",
  "h2",

Cargo.toml

@@ -12,7 +12,7 @@ path = "src/msghandler.rs"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 tokio = { version = "1", features = ["full"] }
-reqwest = { version = "0.12", features = ["json", "stream", "multipart"] }
+reqwest = { version = "0.12", features = ["json", "stream", "multipart", "blocking"] }
 uuid = { version = "1", features = ["v4", "serde"] }
 base64 = "0.22"
 chrono = { version = "0.4", features = ["serde"] }

examples/smartreceive_example.rs

@@ -1,7 +1,6 @@
 use msghandler::{smartreceive, SmartreceiveOptions};
 
-#[tokio::main]
-async fn main() {
+fn main() {
     // Simulated message JSON (received via any transport)
     let msg_json_str = r#"{
         "correlation_id": "abc123-def456-ghi789",
@@ -43,7 +42,7 @@ async fn main() {
 
     let options = SmartreceiveOptions::default();
 
-    match smartreceive(msg_json_str, &options).await {
+    match smartreceive(msg_json_str, &options) {
         Ok(envelope) => {
             println!("=== Envelope Received ===");
             println!("Correlation ID: {}", envelope.correlation_id);

examples/smartsend_example.rs

@@ -1,7 +1,6 @@
 use msghandler::{smartsend, Payload, SmartsendOptions};
 
-#[tokio::main]
-async fn main() {
+fn main() {
     // Create mixed payload data
     let payloads = vec![
         (
@@ -33,7 +32,7 @@ async fn main() {
         ..Default::default()
     };
 
-    match smartsend("/agent/wine/api/v1/prompt", &payloads, &options).await {
+    match smartsend("/agent/wine/api/v1/prompt", &payloads, &options) {
         Ok((envelope, json_str)) => {
             println!("=== Envelope Created ===");
             println!("Correlation ID: {}", envelope.correlation_id);

src/msghandler.rs

@@ -17,10 +17,9 @@
 // Supported types: "text", "dictionary", "arrowtable", "jsontable",
 //                  "image", "audio", "video", "binary"
 
-use async_trait::async_trait;
 use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64};
 use chrono::Utc;
-use reqwest::Client;
+use reqwest::blocking::Client;
 use serde::{Deserialize, Serialize};
 use serde_json::Value as JsonValue;
 use std::collections::HashMap;
@@ -28,7 +27,6 @@ use std::fmt;
 use std::path::Path;
 use std::sync::Arc;
 use std::time::Duration;
-use tokio::time::sleep;
 use uuid::Uuid;
 
 // ============================================================================
@@ -59,7 +57,7 @@ pub const DEFAULT_MAX_DELAY: u64 = 5_000;
 
 /// Errors that can occur during msghandler operations
 #[derive(Debug)]
-pub enum msghandlerError {
+pub enum MsgHandlerError {
     /// Unsupported or unknown payload type
     UnknownPayloadType(String),
     /// File server upload failed
@@ -86,34 +84,34 @@ pub enum msghandlerError {
     InvalidEnvelope(String),
 }
 
-impl fmt::Display for msghandlerError {
+impl fmt::Display for MsgHandlerError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         match self {
-            msghandlerError::UnknownPayloadType(p) => write!(f, "Unknown payload_type: {}", p),
-            msghandlerError::UploadFailed(msg) => write!(f, "Failed to upload: {}", msg),
-            msghandlerError::DownloadFailed { url, retries } => {
+            MsgHandlerError::UnknownPayloadType(p) => write!(f, "Unknown payload_type: {}", p),
+            MsgHandlerError::UploadFailed(msg) => write!(f, "Failed to upload: {}", msg),
+            MsgHandlerError::DownloadFailed { url, retries } => {
                 write!(f, "Failed to fetch {} after {} attempts", url, retries)
             }
-            msghandlerError::UnknownTransport(t) => write!(f, "Unknown transport type: {}", t),
-            msghandlerError::ConnectionFailed(msg) => write!(f, "Connection failed: {}", msg),
-            msghandlerError::DeserializationError(msg) => {
+            MsgHandlerError::UnknownTransport(t) => write!(f, "Unknown transport type: {}", t),
+            MsgHandlerError::ConnectionFailed(msg) => write!(f, "Connection failed: {}", msg),
+            MsgHandlerError::DeserializationError(msg) => {
                 write!(f, "Deserialization error: {}", msg)
             }
-            msghandlerError::HttpError { status, message } => {
+            MsgHandlerError::HttpError { status, message } => {
                 write!(f, "HTTP error {}: {}", status, message)
             }
-            msghandlerError::IoError(msg) => write!(f, "IO error: {}", msg),
-            msghandlerError::JsonError(msg) => write!(f, "JSON error: {}", msg),
-            msghandlerError::Base64Error(msg) => write!(f, "Base64 error: {}", msg),
-            msghandlerError::SizeExceeded { size, max } => {
+            MsgHandlerError::IoError(msg) => write!(f, "IO error: {}", msg),
+            MsgHandlerError::JsonError(msg) => write!(f, "JSON error: {}", msg),
+            MsgHandlerError::Base64Error(msg) => write!(f, "Base64 error: {}", msg),
+            MsgHandlerError::SizeExceeded { size, max } => {
                 write!(f, "Payload size {} exceeds max {}", size, max)
             }
-            msghandlerError::InvalidEnvelope(msg) => write!(f, "Invalid envelope: {}", msg),
+            MsgHandlerError::InvalidEnvelope(msg) => write!(f, "Invalid envelope: {}", msg),
         }
     }
 }
 
-impl std::error::Error for msghandlerError {}
+impl std::error::Error for MsgHandlerError {}
 
 // ============================================================================
 // Payload Enum - Type-safe payload data
@@ -318,8 +316,8 @@ impl MsgEnvelopeV1 {
     }
 
     /// Convert the envelope to a JSON string for transport
-    pub fn to_json(&self) -> Result<String, msghandlerError> {
-        serde_json::to_string(self).map_err(|e| msghandlerError::JsonError(e.to_string()))
+    pub fn to_json(&self) -> Result<String, MsgHandlerError> {
+        serde_json::to_string(self).map_err(|e| MsgHandlerError::JsonError(e.to_string()))
     }
 }
 
@@ -405,16 +403,15 @@ impl Default for SmartreceiveOptions {
 // ============================================================================
 
 /// Trait for uploading data to a file server
-#[async_trait]
 pub trait FileUploadHandler: Send + Sync {
     /// Upload data to the file server
     /// Returns upload ID, file ID, and download URL
-    async fn upload(
+    fn upload(
         &self,
         file_server_url: &str,
         dataname: &str,
         data: &[u8],
-    ) -> Result<UploadResult, msghandlerError>;
+    ) -> Result<UploadResult, MsgHandlerError>;
 }
 
 /// Result of a file server upload
@@ -431,17 +428,16 @@ pub struct UploadResult {
 }
 
 /// Trait for downloading data from a file server
-#[async_trait]
 pub trait FileDownloadHandler: Send + Sync {
     /// Download data from a URL with retry logic
-    async fn download(
+    fn download(
         &self,
         url: &str,
         max_retries: u32,
         base_delay: u64,
         max_delay: u64,
         correlation_id: &str,
-    ) -> Result<Vec<u8>, msghandlerError>;
+    ) -> Result<Vec<u8>, MsgHandlerError>;
 }
 
 // ============================================================================
@@ -457,14 +453,13 @@ pub trait FileDownloadHandler: Send + Sync {
 /// 4. Returns identifiers and download URL
 pub struct PlikOneshotUploadHandler;
 
-#[async_trait]
 impl FileUploadHandler for PlikOneshotUploadHandler {
-    async fn upload(
+    fn upload(
         &self,
         file_server_url: &str,
         dataname: &str,
         data: &[u8],
-    ) -> Result<UploadResult, msghandlerError> {
+    ) -> Result<UploadResult, MsgHandlerError> {
         let client = Client::new();
 
         // Step 1: Create one-shot upload session
@@ -474,11 +469,10 @@ impl FileUploadHandler for PlikOneshotUploadHandler {
             .header("Content-Type", "application/json")
             .json(&session_body)
             .send()
-            .await
-            .map_err(|e| msghandlerError::UploadFailed(format!("Failed to create upload session: {}", e)))?;
+            .map_err(|e| MsgHandlerError::UploadFailed(format!("Failed to create upload session: {}", e)))?;
 
         if !session_resp.status().is_success() {
-            return Err(msghandlerError::UploadFailed(format!(
+            return Err(MsgHandlerError::UploadFailed(format!(
                 "Session creation failed with status: {}",
                 session_resp.status()
             )));
@@ -486,8 +480,7 @@ impl FileUploadHandler for PlikOneshotUploadHandler {
 
         let session_json: JsonValue = session_resp
             .json()
-            .await
-            .map_err(|e| msghandlerError::UploadFailed(format!("Failed to parse session response: {}", e)))?;
+            .map_err(|e| MsgHandlerError::UploadFailed(format!("Failed to parse session response: {}", e)))?;
 
         let uploadid = session_json["id"]
             .as_str()
@@ -499,31 +492,30 @@ impl FileUploadHandler for PlikOneshotUploadHandler {
             .to_string();
 
         if uploadid.is_empty() || uploadtoken.is_empty() {
-            return Err(msghandlerError::UploadFailed(
+            return Err(MsgHandlerError::UploadFailed(
                 "Missing uploadid or uploadToken in session response".to_string(),
             ));
         }
 
         // Step 2: Upload the file as multipart/form-data
         let upload_url = format!("{}/file/{}", file_server_url, uploadid);
-        let form = reqwest::multipart::Form::new()
+        let form = reqwest::blocking::multipart::Form::new()
             .part(
                 "file",
-                reqwest::multipart::Part::bytes(data.to_vec())
+                reqwest::blocking::multipart::Part::bytes(data.to_vec())
                     .file_name(dataname.to_string())
                     .mime_str("application/octet-stream")
-                    .map_err(|e| msghandlerError::UploadFailed(format!("Invalid MIME type: {}", e)))?,
+                    .map_err(|e| MsgHandlerError::UploadFailed(format!("Invalid MIME type: {}", e)))?,
             );
         let resp = client
             .post(&upload_url)
             .header("X-UploadToken", &uploadtoken)
             .multipart(form)
             .send()
-            .await
-            .map_err(|e| msghandlerError::UploadFailed(format!("Upload request failed: {}", e)))?;
+            .map_err(|e| MsgHandlerError::UploadFailed(format!("Upload request failed: {}", e)))?;
 
         if !resp.status().is_success() {
-            return Err(msghandlerError::UploadFailed(format!(
+            return Err(MsgHandlerError::UploadFailed(format!(
                 "Upload failed with status: {}",
                 resp.status()
             )));
@@ -532,8 +524,7 @@ impl FileUploadHandler for PlikOneshotUploadHandler {
         let status_code = resp.status().as_u16();
         let upload_json: JsonValue = resp
             .json()
-            .await
-            .map_err(|e| msghandlerError::UploadFailed(format!("Failed to parse upload response: {}", e)))?;
+            .map_err(|e| MsgHandlerError::UploadFailed(format!("Failed to parse upload response: {}", e)))?;
 
         let fileid = upload_json["id"].as_str().unwrap_or("").to_string();
 
@@ -564,29 +555,29 @@ impl FileUploadHandler for PlikOneshotUploadHandler {
 /// 4. Throws error after max_retries are exhausted
 pub struct BackoffDownloadHandler;
 
-#[async_trait]
 impl FileDownloadHandler for BackoffDownloadHandler {
-    async fn download(
+    fn download(
         &self,
         url: &str,
         max_retries: u32,
         base_delay: u64,
         max_delay: u64,
         correlation_id: &str,
-    ) -> Result<Vec<u8>, msghandlerError> {
+    ) -> Result<Vec<u8>, MsgHandlerError> {
         let client = Client::new();
         let mut delay = base_delay;
 
         for attempt in 1..=max_retries {
-            match client.get(url).send().await {
+            match client.get(url).send() {
                 Ok(response) if response.status().is_success() => {
                     log_trace(correlation_id, &format!(
                         "Successfully fetched {} on attempt {}",
                         url, attempt
                     ));
-                    let bytes = response.bytes().await
+                    let bytes = response
+                        .bytes()
                         .map(|b| b.to_vec())
-                        .map_err(|_e| msghandlerError::DownloadFailed {
+                        .map_err(|_e| MsgHandlerError::DownloadFailed {
                             url: url.to_string(),
                             retries: max_retries,
                         })?;
@@ -611,12 +602,12 @@ impl FileDownloadHandler for BackoffDownloadHandler {
             }
 
             if attempt < max_retries {
-                sleep(Duration::from_millis(delay)).await;
+                std::thread::sleep(Duration::from_millis(delay));
                 delay = (delay * 2).min(max_delay);
             }
         }
 
-        Err(msghandlerError::DownloadFailed {
+        Err(MsgHandlerError::DownloadFailed {
             url: url.to_string(),
             retries: max_retries,
         })
@@ -629,14 +620,14 @@ impl FileDownloadHandler for BackoffDownloadHandler {
 
 /// Serialize payload data according to the specified payload type.
 /// Returns the raw bytes for the serialized data.
-fn serialize_data(payload: &Payload) -> Result<Vec<u8>, msghandlerError> {
+fn serialize_data(payload: &Payload) -> Result<Vec<u8>, MsgHandlerError> {
     match payload {
         Payload::Text(s) => Ok(s.as_bytes().to_vec()),
         Payload::Dictionary(v) => serde_json::to_vec(v)
-            .map_err(|e| msghandlerError::DeserializationError(format!("Dictionary serialization failed: {}", e))),
+            .map_err(|e| MsgHandlerError::DeserializationError(format!("Dictionary serialization failed: {}", e))),
         Payload::ArrowTable(b) => Ok(b.clone()),
         Payload::JsonTable(v) => serde_json::to_vec(v)
-            .map_err(|e| msghandlerError::DeserializationError(format!("JsonTable serialization failed: {}", e))),
+            .map_err(|e| MsgHandlerError::DeserializationError(format!("JsonTable serialization failed: {}", e))),
         Payload::Image(b) => Ok(b.clone()),
         Payload::Audio(b) => Ok(b.clone()),
         Payload::Video(b) => Ok(b.clone()),
@@ -654,18 +645,18 @@ fn deserialize_data(
     payload_bytes: &[u8],
     payload_type: &str,
     _correlation_id: &str,
-) -> Result<Payload, msghandlerError> {
+) -> Result<Payload, MsgHandlerError> {
     match payload_type {
         "text" => {
             let text = String::from_utf8(payload_bytes.to_vec())
-                .map_err(|e| msghandlerError::DeserializationError(format!("Invalid UTF-8 for text: {}", e)))?;
+                .map_err(|e| MsgHandlerError::DeserializationError(format!("Invalid UTF-8 for text: {}", e)))?;
             Ok(Payload::Text(text))
         }
         "dictionary" => {
             let json_str = String::from_utf8(payload_bytes.to_vec())
-                .map_err(|e| msghandlerError::DeserializationError(format!("Invalid UTF-8 for dictionary: {}", e)))?;
+                .map_err(|e| MsgHandlerError::DeserializationError(format!("Invalid UTF-8 for dictionary: {}", e)))?;
             let value: JsonValue = serde_json::from_str(&json_str)
-                .map_err(|e| msghandlerError::DeserializationError(format!("Invalid JSON for dictionary: {}", e)))?;
+                .map_err(|e| MsgHandlerError::DeserializationError(format!("Invalid JSON for dictionary: {}", e)))?;
             Ok(Payload::Dictionary(value))
         }
         "arrowtable" => {
@@ -673,16 +664,16 @@ fn deserialize_data(
         }
         "jsontable" => {
             let json_str = String::from_utf8(payload_bytes.to_vec())
-                .map_err(|e| msghandlerError::DeserializationError(format!("Invalid UTF-8 for jsontable: {}", e)))?;
+                .map_err(|e| MsgHandlerError::DeserializationError(format!("Invalid UTF-8 for jsontable: {}", e)))?;
             let value: JsonValue = serde_json::from_str(&json_str)
-                .map_err(|e| msghandlerError::DeserializationError(format!("Invalid JSON for jsontable: {}", e)))?;
+                .map_err(|e| MsgHandlerError::DeserializationError(format!("Invalid JSON for jsontable: {}", e)))?;
             Ok(Payload::JsonTable(value))
         }
         "image" => Ok(Payload::Image(payload_bytes.to_vec())),
         "audio" => Ok(Payload::Audio(payload_bytes.to_vec())),
         "video" => Ok(Payload::Video(payload_bytes.to_vec())),
         "binary" => Ok(Payload::Binary(payload_bytes.to_vec())),
-        _ => Err(msghandlerError::UnknownPayloadType(payload_type.to_string())),
+        _ => Err(MsgHandlerError::UnknownPayloadType(payload_type.to_string())),
     }
 }
 
@@ -720,13 +711,12 @@ pub fn log_trace(correlation_id: &str, message: &str) {
 /// - `options`: Configuration options
 ///
 /// # Returns
-/// - `Result<(MsgEnvelopeV1, String), msghandlerError>` containing the envelope and JSON string
+/// - `Result<(MsgEnvelopeV1, String), MsgHandlerError>` containing the envelope and JSON string
 ///
 /// # Example
 /// ```no_run
 /// use msghandler::{smartsend, Payload, SmartsendOptions};
 ///
-/// # async fn example() -> Result<(), Box<dyn std::error::Error>> {
 /// let (envelope, json_str) = smartsend(
 ///     "/agent/wine/api/v1/prompt",
 ///     &[
@@ -734,17 +724,15 @@ pub fn log_trace(correlation_id: &str, message: &str) {
 ///         ("data".to_string(), Payload::Binary(vec![1, 2, 3]), "binary".to_string()),
 ///     ],
 ///     &SmartsendOptions::default(),
-/// ).await?;
+/// ).unwrap();
 ///
 /// // Caller publishes via their preferred transport
-/// # Ok(())
-/// # }
 /// ```
-pub async fn smartsend(
+pub fn smartsend(
     subject: &str,
     data: &[(String, Payload, String)],
     options: &SmartsendOptions,
-) -> Result<(MsgEnvelopeV1, String), msghandlerError> {
+) -> Result<(MsgEnvelopeV1, String), MsgHandlerError> {
     let correlation_id = if options.correlation_id.is_empty() {
         Uuid::new_v4().to_string()
     } else {
@@ -810,8 +798,7 @@ pub async fn smartsend(
             log_trace(&correlation_id, "Using link transport, uploading to fileserver");
 
             let upload_result = upload_handler
-                .upload(&options.fileserver_url, dataname, &payload_bytes)
-                .await?;
+                .upload(&options.fileserver_url, dataname, &payload_bytes)?;
 
             log_trace(&correlation_id, &format!(
                 "Uploaded to URL: {}", upload_result.url
@@ -889,14 +876,13 @@ fn store_deserialized_data(payload: &MsgPayloadV1, deserialized: &Payload) -> Ms
 /// - `options`: Configuration options
 ///
 /// # Returns
-/// - `Result<MsgEnvelopeV1, msghandlerError>` with deserialized payloads
+/// - `Result<MsgEnvelopeV1, MsgHandlerError>` with deserialized payloads
 ///
 /// # Example
 /// ```no_run
 /// use msghandler::{smartreceive, SmartreceiveOptions};
 /// use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64};
 ///
-/// # async fn example() -> Result<(), Box<dyn std::error::Error>> {
 /// let msg_json_str = r#"{"correlation_id":"abc123","msg_id":"msg-uuid",
 ///     "timestamp":"2026-01-01T00:00:00Z","send_to":"/test",
 ///     "msg_purpose":"chat","sender_name":"test","sender_id":"sender-uuid",
@@ -907,26 +893,24 @@ fn store_deserialized_data(payload: &MsgPayloadV1, deserialized: &Payload) -> Ms
 ///         "data":"SGVsbG8=","metadata":{"payload_bytes":5}
 ///     }]}"#;
 ///
-/// let envelope = smartreceive(msg_json_str, &SmartreceiveOptions::default()).await?;
+/// let envelope = smartreceive(msg_json_str, &SmartreceiveOptions::default()).unwrap();
 ///
 /// for payload in &envelope.payloads {
 ///     if payload.transport == "direct" {
-///         let decoded = BASE64.decode(&payload.data)?;
+///         let decoded = BASE64.decode(&payload.data).unwrap();
 ///         println!("{}: {}", payload.dataname, String::from_utf8_lossy(&decoded));
 ///     } else {
 ///         println!("{}: URL={}", payload.dataname, payload.data);
 ///     }
 /// }
-/// # Ok(())
-/// # }
 /// ```
-pub async fn smartreceive(
+pub fn smartreceive(
     msg_json_str: &str,
     options: &SmartreceiveOptions,
-) -> Result<MsgEnvelopeV1, msghandlerError> {
+) -> Result<MsgEnvelopeV1, MsgHandlerError> {
     // Parse the JSON envelope
     let mut env: MsgEnvelopeV1 = serde_json::from_str(msg_json_str)
-        .map_err(|e| msghandlerError::InvalidEnvelope(format!(
+        .map_err(|e| MsgHandlerError::InvalidEnvelope(format!(
             "Failed to parse envelope JSON: {}", e
         )))?;
 
@@ -953,7 +937,7 @@ pub async fn smartreceive(
 
                 // Decode Base64 payload
                 let payload_bytes = BASE64.decode(&payload.data)
-                    .map_err(|e| msghandlerError::Base64Error(format!(
+                    .map_err(|e| MsgHandlerError::Base64Error(format!(
                         "Base64 decode failed for '{}': {}", dataname, e
                     )))?;
 
@@ -981,8 +965,7 @@ pub async fn smartreceive(
                         options.base_delay,
                         options.max_delay,
                         &correlation_id,
-                    )
-                    .await?;
+                    )?;
 
                 // Deserialize based on type and store result back into payload
                 let deserialized = deserialize_data(
@@ -995,7 +978,7 @@ pub async fn smartreceive(
                 updated_payloads.push(updated);
             }
             unknown => {
-                return Err(msghandlerError::UnknownTransport(format!(
+                return Err(MsgHandlerError::UnknownTransport(format!(
                     "Unknown transport type '{}' for payload '{}'",
                     unknown, dataname
                 )));
@@ -1012,11 +995,11 @@ pub async fn smartreceive(
 // ============================================================================
 
 /// Send a single text payload
-pub async fn send_text(
+pub fn send_text(
     subject: &str,
     text: &str,
     options: &SmartsendOptions,
-) -> Result<(MsgEnvelopeV1, String), msghandlerError> {
+) -> Result<(MsgEnvelopeV1, String), MsgHandlerError> {
     smartsend(
         subject,
         &[(
@@ -1026,15 +1009,14 @@ pub async fn send_text(
         )],
         options,
     )
-    .await
 }
 
 /// Send a single dictionary payload
-pub async fn send_dictionary(
+pub fn send_dictionary(
     subject: &str,
     data: &JsonValue,
     options: &SmartsendOptions,
-) -> Result<(MsgEnvelopeV1, String), msghandlerError> {
+) -> Result<(MsgEnvelopeV1, String), MsgHandlerError> {
     smartsend(
         subject,
         &[(
@@ -1044,15 +1026,14 @@ pub async fn send_dictionary(
         )],
         options,
     )
-    .await
 }
 
 /// Send a single binary payload
-pub async fn send_binary(
+pub fn send_binary(
     subject: &str,
     data: &[u8],
     options: &SmartsendOptions,
-) -> Result<(MsgEnvelopeV1, String), msghandlerError> {
+) -> Result<(MsgEnvelopeV1, String), MsgHandlerError> {
     smartsend(
         subject,
         &[(
@@ -1062,7 +1043,6 @@ pub async fn send_binary(
         )],
         options,
     )
-    .await
 }
 
 // ============================================================================
@@ -1079,25 +1059,22 @@ pub async fn send_binary(
 /// - `filepath`: Full path to the local file to upload
 /// 
 /// # Returns
-/// - `Result<UploadResult, msghandlerError>` with uploadid, fileid, and download URL
+/// - `Result<UploadResult, MsgHandlerError>` with uploadid, fileid, and download URL
 /// 
 /// # Example
 /// ```no_run
 /// use msghandler::plik_upload_file;
 /// 
-/// # async fn example() -> Result<(), Box<dyn std::error::Error>> {
-/// let result = plik_upload_file("http://localhost:8080", "./large_file.zip").await?;
+/// let result = plik_upload_file("http://localhost:8080", "./large_file.zip").unwrap();
 /// println!("Uploaded to: {}", result.url);
-/// # Ok(())
-/// # }
 /// ```
-pub async fn plik_upload_file(
+pub fn plik_upload_file(
     file_server_url: &str,
     filepath: &str,
-) -> Result<UploadResult, msghandlerError> {
+) -> Result<UploadResult, MsgHandlerError> {
     // Read the file from disk
-    let data = tokio::fs::read(filepath).await
-        .map_err(|e| msghandlerError::IoError(format!(
+    let data = std::fs::read(filepath)
+        .map_err(|e| MsgHandlerError::IoError(format!(
             "Failed to read file '{}': {}", filepath, e
         )))?;
 
@@ -1108,7 +1085,7 @@ pub async fn plik_upload_file(
         .unwrap_or_default();
 
     // Upload using the Plik one-shot handler
-    PlikOneshotUploadHandler.upload(file_server_url, &dataname, &data).await
+    PlikOneshotUploadHandler.upload(file_server_url, &dataname, &data)
 }
 
 // ============================================================================
@@ -1123,7 +1100,7 @@ pub async fn plik_upload_file(
 //   - `SmartsendOptions`, `SmartreceiveOptions` - configuration
 //   - `FileUploadHandler`, `FileDownloadHandler` - trait abstractions
 //   - `PlikOneshotUploadHandler`, `BackoffDownloadHandler` - default implementations
-//   - `msghandlerError` - error type
+//   - `MsgHandlerError` - error type
 
 #[cfg(test)]
 mod tests {
@@ -1204,10 +1181,10 @@ mod tests {
 
     #[test]
     fn test_error_display() {
-        let err = msghandlerError::UnknownPayloadType("custom_type".to_string());
+        let err = MsgHandlerError::UnknownPayloadType("custom_type".to_string());
         assert!(format!("{}", err).contains("custom_type"));
 
-        let err = msghandlerError::DownloadFailed {
+        let err = MsgHandlerError::DownloadFailed {
             url: "http://example.com/file".to_string(),
             retries: 5,
         };