diff --git a/discovery/src/api/routes/node.rs b/discovery/src/api/routes/node.rs
index 1c676e85..62cceb2c 100644
--- a/discovery/src/api/routes/node.rs
+++ b/discovery/src/api/routes/node.rs
@@ -33,6 +33,24 @@ pub async fn register_node(
         return HttpResponse::BadRequest()
             .json(ApiResponse::new(false, "Invalid x-address header"));
     }
+    if let Some(contracts) = data.contracts.clone() {
+        if (contracts
+            .compute_registry
+            .get_node(
+                node.provider_address.parse().unwrap(),
+                node.id.parse().unwrap(),
+            )
+            .await)
+            .is_err()
+        {
+            return HttpResponse::BadRequest().json(ApiResponse::new(
+                false,
+                "Node not found in compute registry",
+            ));
+        }
+    }
+
+    let node_store = data.node_store.clone();
 
     let update_node = node.clone();
     let existing_node = data.node_store.get_node(update_node.id.clone());
diff --git a/discovery/src/chainsync/sync.rs b/discovery/src/chainsync/sync.rs
index 002a1c96..76d874e6 100644
--- a/discovery/src/chainsync/sync.rs
+++ b/discovery/src/chainsync/sync.rs
@@ -33,7 +33,6 @@ impl ChainSync {
             last_chain_sync,
         }
     }
-
     async fn sync_single_node(
         node_store: Arc<NodeStore>,
         contracts: Arc<Contracts>,
@@ -41,95 +40,103 @@ impl ChainSync {
     ) -> Result<(), Error> {
         let mut n = node.clone();
 
-        // Safely parse provider_address and node_address
-        let provider_address = Address::from_str(&node.provider_address).map_err(|e| {
-            eprintln!("Failed to parse provider address: {}", e);
-            anyhow::anyhow!("Invalid provider address")
-        })?;
-
-        let node_address = Address::from_str(&node.id).map_err(|e| {
-            eprintln!("Failed to parse node address: {}", e);
-            anyhow::anyhow!("Invalid node address")
-        })?;
+        async fn sync_single_node(
+            node_store: Arc<NodeStore>,
+            contracts: Arc<Contracts>,
+            node: DiscoveryNode,
+        ) -> Result<(), Error> {
+            let mut n = node.clone();
 
-        let node_info = contracts
-            .compute_registry
-            .get_node(provider_address, node_address)
-            .await
-            .map_err(|e| {
-                eprintln!("Error retrieving node info: {}", e);
-                anyhow::anyhow!("Failed to retrieve node info")
+            // Safely parse provider_address and node_address
+            let provider_address = Address::from_str(&node.provider_address).map_err(|e| {
+                eprintln!("Failed to parse provider address: {}", e);
+                anyhow::anyhow!("Invalid provider address")
             })?;
 
-        let provider_info = contracts
-            .compute_registry
-            .get_provider(provider_address)
-            .await
-            .map_err(|e| {
-                eprintln!("Error retrieving provider info: {}", e);
-                anyhow::anyhow!("Failed to retrieve provider info")
+            let node_address = Address::from_str(&node.id).map_err(|e| {
+                eprintln!("Failed to parse node address: {}", e);
+                anyhow::anyhow!("Invalid node address")
             })?;
 
-        let (is_active, is_validated) = node_info;
-        n.is_active = is_active;
-        n.is_validated = is_validated;
-        n.is_provider_whitelisted = provider_info.is_whitelisted;
+            let node_info = contracts
+                .compute_registry
+                .get_node(provider_address, node_address)
+                .await
+                .map_err(|e| {
+                    eprintln!("Error retrieving node info: {}", e);
+                    anyhow::anyhow!("Failed to retrieve node info")
+                })?;
 
-        // Handle potential errors from async calls
-        let is_blacklisted = contracts
-            .compute_pool
-            .is_node_blacklisted(node.node.compute_pool_id, node_address)
-            .await
-            .map_err(|e| {
-                eprintln!("Error checking if node is blacklisted: {}", e);
-                anyhow::anyhow!("Failed to check blacklist status")
-            })?;
-        n.is_blacklisted = is_blacklisted;
-        match node_store.update_node(n) {
-            Ok(_) => (),
-            Err(e) => {
-                error!("Error updating node: {}", e);
+            let provider_info = contracts
+                .compute_registry
+                .get_provider(provider_address)
+                .await
+                .map_err(|e| {
+                    eprintln!("Error retrieving provider info: {}", e);
+                    anyhow::anyhow!("Failed to retrieve provider info")
+                })?;
+
+            let (is_active, is_validated) = node_info;
+            n.is_active = is_active;
+            n.is_validated = is_validated;
+            n.is_provider_whitelisted = provider_info.is_whitelisted;
+
+            // Handle potential errors from async calls
+            let is_blacklisted = contracts
+                .compute_pool
+                .is_node_blacklisted(node.node.compute_pool_id, node_address)
+                .await
+                .map_err(|e| {
+                    eprintln!("Error checking if node is blacklisted: {}", e);
+                    anyhow::anyhow!("Failed to check blacklist status")
+                })?;
+            n.is_blacklisted = is_blacklisted;
+            match node_store.update_node(n) {
+                Ok(_) => (),
+                Err(e) => {
+                    error!("Error updating node: {}", e);
+                }
             }
-        }
 
-        Ok(())
-    }
+            Ok(())
+        }
 
-    pub async fn run(&self) -> Result<(), Error> {
-        let node_store_clone = self.node_store.clone();
-        let contracts_clone = self.contracts.clone();
-        let cancel_token = self.cancel_token.clone();
-        let chain_sync_interval = self.chain_sync_interval;
-        let last_chain_sync = self.last_chain_sync.clone();
+        pub async fn run(&self) -> Result<(), Error> {
+            let node_store_clone = self.node_store.clone();
+            let contracts_clone = self.contracts.clone();
+            let cancel_token = self.cancel_token.clone();
+            let chain_sync_interval = self.chain_sync_interval;
+            let last_chain_sync = self.last_chain_sync.clone();
 
-        tokio::spawn(async move {
-            let mut interval = tokio::time::interval(chain_sync_interval);
-            loop {
-                tokio::select! {
-                    _ = interval.tick() => {
-                        let nodes = node_store_clone.get_nodes();
-                        match nodes {
-                            Ok(nodes) => {
-                                for node in nodes {
-                                    if let Err(e) = ChainSync::sync_single_node(node_store_clone.clone(), contracts_clone.clone(), node).await {
-                                        error!("Error syncing node: {}", e);
+            tokio::spawn(async move {
+                let mut interval = tokio::time::interval(chain_sync_interval);
+                loop {
+                    tokio::select! {
+                        _ = interval.tick() => {
+                            let nodes = node_store_clone.get_nodes();
+                            match nodes {
+                                Ok(nodes) => {
+                                    for node in nodes {
+                                        if let Err(e) = ChainSync::sync_single_node(node_store_clone.clone(), contracts_clone.clone(), node).await {
+                                            error!("Error syncing node: {}", e);
+                                        }
                                     }
+                                    // Update the last chain sync time
+                                    let mut last_sync = last_chain_sync.lock().await;
+                                    *last_sync = Some(SystemTime::now());
+                                }
+                                Err(e) => {
+                                    error!("Error getting nodes: {}", e);
                                 }
-                                // Update the last chain sync time
-                                let mut last_sync = last_chain_sync.lock().await;
-                                *last_sync = Some(SystemTime::now());
-                            }
-                            Err(e) => {
-                                error!("Error getting nodes: {}", e);
                             }
                         }
-                    }
-                    _ = cancel_token.cancelled() => {
-                        break;
+                        _ = cancel_token.cancelled() => {
+                            break;
+                        }
                     }
                 }
-            }
-        });
-        Ok(())
+            });
+            Ok(())
+        }
     }
 }
diff --git a/orchestrator/src/discovery/monitor.rs b/orchestrator/src/discovery/monitor.rs
index 9518da3f..ea5b12b5 100644
--- a/orchestrator/src/discovery/monitor.rs
+++ b/orchestrator/src/discovery/monitor.rs
@@ -206,6 +206,21 @@ impl<'b> DiscoveryMonitor<'b> {
         Ok(())
     }
 
+    async fn get_nodes(&self) -> Result<Vec<OrchestratorNode>, Error> {
+        let discovery_nodes = self.fetch_nodes_from_discovery().await?;
+
+        for discovery_node in &discovery_nodes {
+            if let Err(e) = self.sync_single_node_with_discovery(discovery_node).await {
+                error!("Error syncing node with discovery: {}", e);
+            }
+        }
+        Ok(discovery_nodes
+            .into_iter()
+            .map(OrchestratorNode::from)
+            .collect())
+    }
+}
+
     async fn get_nodes(&self) -> Result<Vec<OrchestratorNode>, Error> {
         let discovery_nodes = self.fetch_nodes_from_discovery().await?;
 
diff --git a/shared/src/web3/contracts/implementations/compute_pool_contract.rs b/shared/src/web3/contracts/implementations/compute_pool_contract.rs
index 1e737a34..f6dd0b8a 100644
--- a/shared/src/web3/contracts/implementations/compute_pool_contract.rs
+++ b/shared/src/web3/contracts/implementations/compute_pool_contract.rs
@@ -168,6 +168,24 @@ impl ComputePool {
         Ok(result)
     }
 
+    pub async fn submit_work(
+        &self,
+        pool_id: U256,
+        node: Address,
+        data: Vec<u8>,
+    ) -> Result<FixedBytes<32>, Box<dyn std::error::Error>> {
+        let result = self
+            .instance
+            .instance()
+            .function("submitWork", &[pool_id.into(), node.into(), data.into()])?
+            .send()
+            .await?
+            .watch()
+            .await?;
+        println!("Result: {:?}", result);
+        Ok(result)
+    }
+
     pub async fn blacklist_node(
         &self,
         pool_id: u32,
diff --git a/validator/src/main.rs b/validator/src/main.rs
index d99b5f0d..ea2def4c 100644
--- a/validator/src/main.rs
+++ b/validator/src/main.rs
@@ -489,3 +489,56 @@ mod tests {
         assert_eq!(resp.result, expected_response.result);
     }
 }
+
+#[cfg(test)]
+mod tests {
+
+    use actix_web::{test, App};
+    use actix_web::{
+        web::{self, post},
+        HttpResponse, Scope,
+    };
+    use shared::models::challenge::{calc_matrix, ChallengeRequest, ChallengeResponse, FixedF64};
+
+    pub async fn handle_challenge(challenge: web::Json<ChallengeRequest>) -> HttpResponse {
+        let result = calc_matrix(&challenge);
+        HttpResponse::Ok().json(result)
+    }
+
+    pub fn challenge_routes() -> Scope {
+        web::scope("/challenge")
+            .route("", post().to(handle_challenge))
+            .route("/", post().to(handle_challenge))
+    }
+
+    #[actix_web::test]
+    async fn test_challenge_route() {
+        let app = test::init_service(App::new().service(challenge_routes())).await;
+
+        let vec_a = [1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0];
+        let vec_b = [9.0, 8.0, 7.0, 6.0, 5.0, 4.0, 3.0, 2.0, 1.0];
+
+        // convert vectors to FixedF64
+        let data_a: Vec<FixedF64> = vec_a.iter().map(|x| FixedF64(*x)).collect();
+        let data_b: Vec<FixedF64> = vec_b.iter().map(|x| FixedF64(*x)).collect();
+
+        let challenge_request = ChallengeRequest {
+            rows_a: 3,
+            cols_a: 3,
+            data_a,
+            rows_b: 3,
+            cols_b: 3,
+            data_b,
+        };
+
+        let req = test::TestRequest::post()
+            .uri("/challenge")
+            .set_json(&challenge_request)
+            .to_request();
+
+        let resp: ChallengeResponse = test::call_and_read_body_json(&app, req).await;
+        let expected_response = calc_matrix(&challenge_request);
+
+        assert_eq!(resp.result, expected_response.result);
+    }
+}
diff --git a/worker/src/api/server.rs b/worker/src/api/server.rs
index 86cf8684..9175c19b 100644
--- a/worker/src/api/server.rs
+++ b/worker/src/api/server.rs
@@ -1,6 +1,7 @@
 use crate::api::routes::challenge::challenge_routes;
 use crate::api::routes::invite::invite_routes;
 use crate::api::routes::task::task_routes;
+use crate::console::Console;
 use crate::docker::DockerService;
 use crate::operations::heartbeat::service::HeartbeatService;
 use crate::state::system_state::SystemState;
diff --git a/worker/src/checks/hardware/hardware_check.rs b/worker/src/checks/hardware/hardware_check.rs
index 3d35d35b..dac3f807 100644
--- a/worker/src/checks/hardware/hardware_check.rs
+++ b/worker/src/checks/hardware/hardware_check.rs
@@ -141,11 +141,16 @@ impl HardwareChecker {
     }
 
     fn collect_gpu_specs(&self) -> Result<Option<GpuSpecs>, Box<dyn std::error::Error>> {
-        Ok(detect_gpu().map(|gpu| GpuSpecs {
-            count: Some(gpu.count.unwrap_or(0)),
-            model: gpu.model,
-            memory_mb: gpu.memory_mb,
-        }))
+        let gpu_specs = detect_gpu();
+        if gpu_specs.is_empty() {
+            return Ok(None);
+        }
+
+        let main_gpu = gpu_specs
+            .into_iter()
+            .max_by_key(|gpu| gpu.count.unwrap_or(0));
+
+        Ok(main_gpu)
     }
 
     fn collect_memory_specs(&self) -> Result<(u32, u32), Box<dyn std::error::Error>> {
diff --git a/worker/src/console/logger.rs b/worker/src/console/logger.rs
new file mode 100644
index 00000000..7e4f5271
--- /dev/null
+++ b/worker/src/console/logger.rs
@@ -0,0 +1,81 @@
+use console::{style, Term};
+use std::cmp;
+use unicode_width::UnicodeWidthStr;
+
+pub struct Console;
+
+impl Console {
+    /// Maximum content width for the box.
+    const MAX_WIDTH: usize = 80;
+
+    /// Calculates the content width for boxes.
+    /// It uses the available terminal width (minus a margin) and caps it at MAX_WIDTH.
+    fn get_content_width() -> usize {
+        let term_width = Term::stdout().size().1 as usize;
+        // Leave a margin of 10 columns.
+        let available = if term_width > 10 {
+            term_width - 10
+        } else {
+            term_width
+        };
+        cmp::min(available, Self::MAX_WIDTH)
+    }
+
+    /// Centers a given text within a given width based on its display width.
+    fn center_text(text: &str, width: usize) -> String {
+        let text_width = UnicodeWidthStr::width(text);
+        if width > text_width {
+            let total_padding = width - text_width;
+            let left = total_padding / 2;
+            let right = total_padding - left;
+            format!("{}{}{}", " ".repeat(left), text, " ".repeat(right))
+        } else {
+            text.to_string()
+        }
+    }
+
+    /// Prints a section header as an aligned box.
+    pub fn section(title: &str) {
+        let content_width = Self::get_content_width();
+        let top_border = format!("╔{}╗", "═".repeat(content_width));
+        let centered_title = Self::center_text(title, content_width);
+        let middle_line = format!("║{}║", centered_title);
+        let bottom_border = format!("╚{}╝", "═".repeat(content_width));
+
+        println!();
+        println!("{}", style(top_border).white().bold());
+        println!("{}", style(middle_line).white().bold());
+        println!("{}", style(bottom_border).white().bold());
+    }
+
+    /// Prints a sub-title.
+    pub fn title(text: &str) {
+        println!();
+        println!("{}", style(text).white().bold());
+    }
+
+    /// Prints an informational message.
+    pub fn info(label: &str, value: &str) {
+        println!("{}: {}", style(label).dim().white(), style(value).white());
+    }
+
+    /// Prints a success message.
+    pub fn success(text: &str) {
+        println!("{} {}", style("✓").green().bold(), style(text).green());
+    }
+
+    /// Prints a warning message.
+    pub fn warning(text: &str) {
+        println!("{} {}", style("⚠").yellow().bold(), style(text).yellow());
+    }
+
+    /// Prints an error message.
+    pub fn error(text: &str) {
+        println!("{} {}", style("✗").red().bold(), style(text).red());
+    }
+
+    /// Prints a progress message.
+    pub fn progress(text: &str) {
+        println!("{} {}", style("→").cyan().bold(), style(text).cyan());
+    }
+}