Shuffle rpc endpoints

nucypher/blockchain/eth/utils.py

@@ -1,3 +1,4 @@
+import random
 import time
 from decimal import Decimal
 from typing import Dict, List, Union
@@ -168,8 +169,8 @@ def get_healthy_default_rpc_endpoints(domain: TACoDomain) -> Dict[int, List[str]
 
     if not domain.is_testnet:
         # iterate over all chains and filter out unhealthy endpoints
-        # only performed for mainnet for now since it would be inefficient 
-        #  on testnet where many more chains are/will be allowed
+        for chain_endpoints in endpoints.values():
+            random.shuffle(chain_endpoints)
         healthy = {
             chain_id: [
                 endpoint