Wait for a node to sync before broadcasting protocol txs

.changelog/unreleased/improvements/2001-no-tx-broadcast-on-sync.md

@@ -0,0 +1,2 @@
+- Wait for a node to sync before broadcasting protocol txs
+  ([\#2001](https://github.com/anoma/namada/pull/2001))

apps/src/lib/node/ledger/broadcaster.rs

@@ -1,5 +1,7 @@
 use std::net::SocketAddr;
+use std::ops::ControlFlow;
 
+use namada::types::control_flow::time;
 use tokio::sync::mpsc::UnboundedReceiver;
 
 use crate::facade::tendermint_rpc::{Client, HttpClient};
@@ -26,6 +28,41 @@ impl Broadcaster {
     /// Loop forever, braodcasting messages that have been received
     /// by the receiver
     async fn run_loop(&mut self) {
+        let result = time::Sleep {
+            strategy: time::ExponentialBackoff {
+                base: 2,
+                as_duration: time::Duration::from_secs,
+            },
+        }
+        .run(|| async {
+            let status_result = time::Sleep {
+                strategy: time::Constant(time::Duration::from_secs(1)),
+            }
+            .timeout(
+                time::Instant::now() + time::Duration::from_secs(30),
+                || async {
+                    match self.client.status().await {
+                        Ok(status) => ControlFlow::Break(status),
+                        Err(_) => ControlFlow::Continue(()),
+                    }
+                },
+            )
+            .await;
+            let status = match status_result {
+                Ok(status) => status,
+                Err(_) => return ControlFlow::Break(Err(())),
+            };
+            if status.sync_info.catching_up {
+                ControlFlow::Continue(())
+            } else {
+                ControlFlow::Break(Ok(()))
+            }
+        })
+        .await;
+        if let Err(()) = result {
+            tracing::error!("Broadcaster failed to connect to CometBFT node");
+            return;
+        }
         loop {
             if let Some(msg) = self.receiver.recv().await {
                 let _ = self.client.broadcast_tx_sync(msg.into()).await;