esplora: treat 503 error like 429

Author: RCasatta

lwk_wollet/src/clients/esplora_client.rs

@@ -125,7 +125,9 @@ fn get_with_retry(url: &str, attempt: usize) -> Result<Response, Error> {
         response.content_length(),
     );
 
-    if response.status() == 429 {
+    // 429 Too many requests
+    // 503 Service Temporarily Unavailable
+    if response.status() == 429 || response.status() == 503 {
         if attempt > 6 {
             return Err(Error::Generic("Too many retry".to_string()));
         }

lwk_wollet/src/clients/esplora_wasm_client.rs

@@ -352,7 +352,9 @@ async fn get_with_retry(url: &str) -> Result<Response, Error> {
             response.content_length(),
         );
 
-        if response.status() == 429 {
+        // 429 Too many requests
+        // 503 Service Temporarily Unavailable
+        if response.status() == 429 || response.status() == 503 {
             if attempt > 6 {
                 return Err(Error::Generic("Too many retry".to_string()));
             }