diff --git a/src.ts/providers/network.ts b/src.ts/providers/network.ts
index b718bfc5f7..ecc9097da7 100644
--- a/src.ts/providers/network.ts
+++ b/src.ts/providers/network.ts
@@ -236,7 +236,7 @@ type Options = {
     ensNetwork?: number;
     priorityFee?: number
     altNames?: Array<string>;
-    etherscan?: { url: string, apiKey: string };
+    etherscan?: { url: string };
 };
 
 // See: https://chainlist.org
@@ -291,19 +291,35 @@ function injectCommonNetworks(): void {
 
     registerEth("xdai", 100, { ensNetwork: 1 });
 
+    registerEth("optimism", 10, {
+        ensNetwork: 1,
+        etherscan: { url: "https:/\/api-optimistic.etherscan.io/" }
+    });
+    registerEth("optimism-goerli", 420, {
+        etherscan: { url: "https:/\/api-goerli-optimistic.etherscan.io/" }
+    });
+
+    registerEth("arbitrum", 42161, {
+        ensNetwork: 1,
+        etherscan: { url: "https:/\/api.arbiscan.io/" }
+    });
+    registerEth("arbitrum-goerli", 421613, {
+        etherscan: { url: "https:/\/api-goerli.arbiscan.io/" }
+    });
+
     // Polygon has a 35 gwei maxPriorityFee requirement
     registerEth("matic", 137, {
         ensNetwork: 1,
 //        priorityFee: 35000000000,
         etherscan: {
-            apiKey: "W6T8DJW654GNTQ34EFEYYP3EZD9DD27CT7",
+//            apiKey: "W6T8DJW654GNTQ34EFEYYP3EZD9DD27CT7",
             url: "https:/\/api.polygonscan.com/"
         }
     });
     registerEth("maticMumbai", 80001, {
 //        priorityFee: 35000000000,
         etherscan: {
-            apiKey: "W6T8DJW654GNTQ34EFEYYP3EZD9DD27CT7",
+//            apiKey: "W6T8DJW654GNTQ34EFEYYP3EZD9DD27CT7",
             url: "https:/\/api-testnet.polygonscan.com/"
         }
     });
@@ -311,13 +327,13 @@ function injectCommonNetworks(): void {
     registerEth("bnb", 56, {
         ensNetwork: 1,
         etherscan: {
-            apiKey: "EVTS3CU31AATZV72YQ55TPGXGMVIFUQ9M9",
+//            apiKey: "EVTS3CU31AATZV72YQ55TPGXGMVIFUQ9M9",
             url: "http:/\/api.bscscan.com"
         }
     });
     registerEth("bnbt", 97, {
         etherscan: {
-            apiKey: "EVTS3CU31AATZV72YQ55TPGXGMVIFUQ9M9",
+//            apiKey: "EVTS3CU31AATZV72YQ55TPGXGMVIFUQ9M9",
             url: "http:/\/api-testnet.bscscan.com"
         }
     });