Split refreshing of mixnode cache into a separate task

explorer-api/src/mix_nodes/mod.rs

@@ -1,3 +1,4 @@
+pub(crate) mod tasks;
 mod utils;
 
 use std::collections::HashMap;

explorer-api/src/mix_nodes/tasks.rs

@@ -0,0 +1,26 @@
+use crate::state::ExplorerApiStateContext;
+
+pub(crate) struct MixNodesTasks {
+    state: ExplorerApiStateContext,
+}
+
+impl MixNodesTasks {
+    pub(crate) fn new(state: ExplorerApiStateContext) -> Self {
+        MixNodesTasks { state }
+    }
+
+    pub(crate) fn start(self) {
+        info!("Spawning mix nodes task runner...");
+        tokio::spawn(async move {
+            let mut interval_timer = tokio::time::interval(std::time::Duration::from_secs(60 * 60)); // every hour
+            loop {
+                // wait for the next interval tick
+                interval_timer.tick().await;
+
+                info!("Updating mix node cache...");
+                self.state.inner.mix_nodes.refresh().await;
+                info!("Done");
+            }
+        });
+    }
+}