Add `start_epoch` to config.

src/hydrabadger/hydrabadger.rs

@@ -51,6 +51,9 @@ const DEFAULT_KEYGEN_PEER_COUNT: usize = 2;
 // debugging.
 const DEFAULT_OUTPUT_EXTRA_DELAY_MS: u64 = 0;
 
+/// Hydrabadger configuration options.
+//
+// TODO: Convert to builder.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Config {
     pub batch_size: usize,
@@ -60,6 +63,7 @@ pub struct Config {
     pub txn_gen_bytes: usize,
     pub keygen_peer_count: usize,
     pub output_extra_delay_ms: u64,
+    pub start_epoch: u64,
 }
 
 impl Config {
@@ -71,6 +75,7 @@ impl Config {
             txn_gen_bytes: DEFAULT_TXN_GEN_BYTES,
             keygen_peer_count: DEFAULT_KEYGEN_PEER_COUNT,
             output_extra_delay_ms: DEFAULT_OUTPUT_EXTRA_DELAY_MS,
+            start_epoch: 0,
         }
     }
 }

src/hydrabadger/state.rs

@@ -228,7 +228,7 @@ impl<T: Contribution> State<T> {
         local_uid: Uid,
         local_sk: SecretKey,
         jp: JoinPlan<Uid>,
-        _cfg: &Config,
+        cfg: &Config,
         step_queue: &SegQueue<Step<T>>,
     ) -> Result<SegQueue<InputOrMessage<T>>, Error> {
         let iom_queue_ret;
@@ -237,6 +237,7 @@ impl<T: Contribution> State<T> {
                 ref mut iom_queue, ..
             } => {
                 let (dhb, dhb_step) = DynamicHoneyBadger::builder()
+                    .epoch(cfg.start_epoch)
                     .build_joining(local_uid, local_sk, jp)?;
                 step_queue.push(dhb_step);
 
@@ -308,6 +309,7 @@ impl<T: Contribution> State<T> {
                 let netinfo = NetworkInfo::new(local_uid, sk_share, pk_set, local_sk, node_ids);
 
                 let dhb = DynamicHoneyBadger::builder()
+                    .epoch(cfg.start_epoch)
                     .build(netinfo);
 
                 info!("");