diff --git a/README.md b/README.md
index 084387f..6f7e1ad 100644
--- a/README.md
+++ b/README.md
@@ -27,6 +27,7 @@ Set your Etherscan token to fetch verified source code,
 
 ```bash
 export ETHERSCAN_EXPLORER_TOKEN=<your-etherscan-token>
+export OPTISCAN_EXPLORER_TOKEN=<your-etherscan-optimism-token>
 ```
 
 Set your Github token to query API without strict rate limiting,
diff --git a/config_samples/optimism/mainnet/optimism_mainnet_config_L1.json b/config_samples/optimism/mainnet/optimism_mainnet_config_L1.json
index 3ad2d0f..7816e80 100644
--- a/config_samples/optimism/mainnet/optimism_mainnet_config_L1.json
+++ b/config_samples/optimism/mainnet/optimism_mainnet_config_L1.json
@@ -1,11 +1,9 @@
 {
     "contracts": {
-      "": "TokenRateNotifier",
-
-      "": "OpStackTokenRatePusher",
-
-        "0x76943C0D61395d8F2edF9060e1533529cAe05dE6": "OssifiableProxy",
-        "": "L1LidoTokensBridge"  
+      "0xe6793B9e4FbA7DE0ee833F9D02bba7DB5EB27823": "TokenRateNotifier",
+      "0xd54c1c6413caac3477AC14b2a80D5398E3c32FfE": "OpStackTokenRatePusher",
+      "0x76943C0D61395d8F2edF9060e1533529cAe05dE6": "OssifiableProxy",
+      "0x168Cfea1Ad879d7032B3936eF3b0E90790b6B6D4": "L1LidoTokensBridge"  
     },
     "explorer_hostname": "api.etherscan.io",
     "explorer_token_env_var": "ETHERSCAN_EXPLORER_TOKEN",
diff --git a/config_samples/optimism/mainnet/optimism_mainnet_config_L2.json b/config_samples/optimism/mainnet/optimism_mainnet_config_L2.json
index 2bba52b..d232d5d 100644
--- a/config_samples/optimism/mainnet/optimism_mainnet_config_L2.json
+++ b/config_samples/optimism/mainnet/optimism_mainnet_config_L2.json
@@ -1,16 +1,13 @@
 {
     "contracts": {
-        "": "OssifiableProxy",
-        "": "TokenRateOracle",
-
-        "0x1F32b1c2345538c0c6f582fCB022739c4A194Ebb": "OssifiableProxy", // wstETH
-        "": "ERC20BridgedPermit",
-
-        "": "OssifiableProxy", // stETH
-        "": "ERC20RebasableBridgedPermit",
-
+        "0x294ED1f214F4e0ecAE31C3Eae4F04EBB3b36C9d0": "OssifiableProxy",
+        "0x4bF0d419793d8722b8391efaD4c9cE78F460CEd3": "TokenRateOracle",
+        "0x1F32b1c2345538c0c6f582fCB022739c4A194Ebb": "OssifiableProxy",
+        "0xFe57042De76c8D6B1DF0E9E2047329fd3e2B7334": "ERC20BridgedPermit",
+        "0x76A50b8c7349cCDDb7578c6627e79b5d99D24138": "OssifiableProxy",
+        "0xe9b65dA5DcBe92f1b397991C464FF568Dc98D761": "ERC20RebasableBridgedPermit",
         "0x8E01013243a96601a86eb3153F0d9Fa4fbFb6957": "OssifiableProxy",
-        "": "L2ERC20ExtendedTokensBridge"
+        "0x2734602C0CEbbA68662552CacD5553370B283E2E": "L2ERC20ExtendedTokensBridge"
     },
     "explorer_hostname": "api-optimistic.etherscan.io",
     "explorer_token_env_var": "OPTISCAN_EXPLORER_TOKEN",