diff --git a/src/main.rs b/src/main.rs
index 82a9db7..feb4e2f 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,23 +1,30 @@
+mod topology;
+
 use serde::{Deserialize, Serialize};
 use serde_json::Value;
 use tonic::{transport::Server, Request, Response, Status};
 
 use crate::node_service::{
     CollectTopologyRequest, Empty, ExampleRequest, HealthCheckRequest, HealthCheckResponse, Loss,
-    PromptRequest, SendOpaqueStatusRequest, SendResultRequest, Tensor, Topology,
+    PromptRequest, SendOpaqueStatusRequest, SendResultRequest, Tensor, Topology as TopologyProto,
 };
 use node_service::node_service_server::{NodeService, NodeServiceServer};
 use node_service::{Shard, TensorRequest};
+use topology::Topology;
 
 pub mod node_service {
     tonic::include_proto!("node_service"); // The string specified here must match the proto package name
 }
 
-struct Node {}
+struct Node {
+    current_topology: Topology,
+}
 
 impl Default for Node {
     fn default() -> Self {
-        Self {}
+        Self {
+            current_topology: Topology::default(),
+        }
     }
 }
 
@@ -78,7 +85,7 @@ impl Node {
 
     fn on_node_status(&self, node_status: NodeStatus) {
         println!("Received NodeStatus: {}", node_status.status);
-
+        // This seems to only be used for visualization so we can ignore it for now
         // if node_status.is_start() {
         //     self.current_topology.active_node_id = node_status.node_id;
         // } else if node_status.is_end() {
diff --git a/src/topology.rs b/src/topology.rs
new file mode 100644
index 0000000..2f5fe66
--- /dev/null
+++ b/src/topology.rs
@@ -0,0 +1,41 @@
+use std::collections::HashMap;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Deserialize, Serialize, Clone)]
+pub struct Topology {
+    nodes: HashMap<String, DeviceCapabilities>,
+    peer_graph: HashMap<String, Vec<PeerConnection>>,
+    active_node_id: Option<String>
+}
+
+impl Default for Topology {
+    fn default() -> Self {
+        Self {
+            nodes: HashMap::new(),
+            peer_graph: HashMap::new(),
+            active_node_id: None,
+        }
+    }
+}
+
+#[derive(Debug, Deserialize, Serialize, Clone)]
+pub struct DeviceCapabilities {
+    model: String,
+    chip: String,
+    memory: u64,
+    flops: DeviceFlops,
+}
+
+#[derive(Debug, Deserialize, Serialize, Clone)]
+pub struct DeviceFlops {
+    fp32: u64,
+    fp16: u64,
+    int8: u64,
+}
+
+#[derive(Debug, Deserialize, Serialize, Clone, Hash, Eq, PartialEq)]
+pub struct PeerConnection {
+    from_id: String,
+    to_id: String,
+    description: Option<String>,
+}