Revert "Merge pull request #200 from sigp/new-structure"

This reverts commit d7a3545be1, reversing
changes made to 1da06c156c.

validator_client/src/duties/service.rs

@@ -0,0 +1,40 @@
+use super::traits::BeaconNode;
+use super::{DutiesManager, PollOutcome};
+use slog::{debug, error, info, Logger};
+use slot_clock::SlotClock;
+use std::time::Duration;
+
+pub struct DutiesManagerService<T: SlotClock, U: BeaconNode> {
+    pub manager: DutiesManager<T, U>,
+    pub poll_interval_millis: u64,
+    pub log: Logger,
+}
+
+impl<T: SlotClock, U: BeaconNode> DutiesManagerService<T, U> {
+    /// Run a loop which polls the manager each `poll_interval_millis` milliseconds.
+    ///
+    /// Logs the results of the polls.
+    pub fn run(&mut self) {
+        loop {
+            match self.manager.poll() {
+                Err(error) => {
+                    error!(self.log, "Epoch duties poll error"; "error" => format!("{:?}", error))
+                }
+                Ok(PollOutcome::NoChange(epoch)) => {
+                    debug!(self.log, "No change in duties"; "epoch" => epoch)
+                }
+                Ok(PollOutcome::DutiesChanged(epoch, duties)) => {
+                    info!(self.log, "Duties changed (potential re-org)"; "epoch" => epoch, "duties" => format!("{:?}", duties))
+                }
+                Ok(PollOutcome::NewDuties(epoch, duties)) => {
+                    info!(self.log, "New duties obtained"; "epoch" => epoch, "duties" => format!("{:?}", duties))
+                }
+                Ok(PollOutcome::UnknownValidatorOrEpoch(epoch)) => {
+                    error!(self.log, "Epoch or validator unknown"; "epoch" => epoch)
+                }
+            };
+
+            std::thread::sleep(Duration::from_millis(self.poll_interval_millis));
+        }
+    }
+}