better error if no redis client pool

config/example.toml

@@ -1,7 +1,7 @@
 [shared]
 chain_id = 1
-# in prod, do `rate_limit_redis = "redis://redis:6379/"`
-#rate_limit_redis = "redis://dev-redis:6379/"
+# in prod, do `redis_url = "redis://redis:6379/"`
+#redis_url = "redis://dev-redis:6379/"
 public_rate_limit_per_minute = 60_000
 # 1GB of cache
 response_cache_max_bytes = 10 ^ 9

web3-proxy/src/app.rs

@@ -330,7 +330,7 @@ impl Web3ProxyApp {
                 Some(pool)
             }
             None => {
-                info!("No redis address");
+                warn!("No redis address");
                 None
             }
         };

web3-proxy/src/config.rs

@@ -75,14 +75,23 @@ impl Web3ConnectionConfig {
         block_sender: Option<flume::Sender<BlockAndRpc>>,
         tx_id_sender: Option<flume::Sender<(TxHash, Arc<Web3Connection>)>>,
     ) -> anyhow::Result<(Arc<Web3Connection>, AnyhowJoinHandle<()>)> {
-        let hard_rate_limit = self.hard_limit.map(|x| (x, redis_client_pool.unwrap()));
+        let hard_limit = match (self.hard_limit, redis_client_pool) {
+            (None, None) => None,
+            (Some(hard_limit), Some(redis_client_pool)) => Some((hard_limit, redis_client_pool)),
+            (None, Some(_)) => None,
+            (Some(hard_limit), None) => {
+                return Err(anyhow::anyhow!(
+                    "no redis client pool! needed for hard limit"
+                ))
+            }
+        };
 
         Web3Connection::spawn(
             chain_id,
             self.url,
             http_client,
             http_interval_sender,
-            hard_rate_limit,
+            hard_limit,
             self.soft_limit,
             block_sender,
             tx_id_sender,