add env example, fix hardhat conf

.env.example

@@ -0,0 +1,9 @@
+INFURA_API_KEY=""
+ETHERSCAN_API_KEY=""
+ETHERSCAN_OPT_API_KEY=""
+
+GOERLI_MNEMONIC=""
+MAINNET_MNEMONIC=""
+
+GOERLI_ALCHEMY_KEY=""
+OP_GOERLI_ALCHEMY_KEY=""

hardhat.config.js

@@ -3,29 +3,41 @@ require("dotenv").config();
 
 const INFURA_API_KEY = process.env.INFURA_API_KEY;
 const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY;
+const ETHERSCAN_OPT_API_KEY = process.env.ETHERSCAN_OPT_API_KEY;
+const MAINNET_PRIVATE_KEY = process.env.MAINNET_PRIVATE_KEY;
 const GOERLI_PRIVATE_KEY = process.env.GOERLI_PRIVATE_KEY;
+const OP_GOERLI_ALCHEMY_KEY = process.env.GOERLI_PRIVATE_KEY;
 
 /** @type import('hardhat/config').HardhatUserConfig */
 module.exports = {
   solidity: "0.8.18",
   networks: {
-    'optimism-goerli': {
+    'mainnet': {
-      chainId: 420,
+      url: `https://goerli.infura.io/v3/${INFURA_API_KEY}`,
-      url: `https://opt-goerli.g.alchemy.com/v2/${process.env.L2_ALCHEMY_KEY}`,
+      accounts: { mnemonic: process.env.MAINNET_MNEMONIC },
-      accounts: { mnemonic: process.env.MNEMONIC }
-    },
-    'optimism-mainnet': {
-      chainId: 10,
-      url: `https://opt-mainnet.g.alchemy.com/v2/${process.env.L2_ALCHEMY_KEY}`,
-      accounts: { mnemonic: process.env.MNEMONIC }
     },
     'goerli': {
       url: `https://goerli.infura.io/v3/${INFURA_API_KEY}`,
-      accounts: [GOERLI_PRIVATE_KEY]
+      accounts: { mnemonic: process.env.GOERLI_MNEMONIC },
+    },
+    'optimism-goerli': {
+      chainId: 420,
+      url: `https://opt-goerli.g.alchemy.com/v2/${process.env.OP_GOERLI_ALCHEMY_KEY}`,
+      accounts: { mnemonic: process.env.GOERLI_MNEMONIC },
+      saveDeployments: true
+    },
+    'optimism-mainnet': {
+      chainId: 10,
+      url: `https://opt-mainnet.g.alchemy.com/v2/${process.env.MAINNET_ALCHEMY_KEY}`,
+      accounts: { mnemonic: process.env.MAINNET_MNEMONIC }
     }
   },
   etherscan: {
-    apiKey: ETHERSCAN_API_KEY,
+    apiKey: {
+      mainnet: ETHERSCAN_API_KEY,
+      optimisticEthereum: ETHERSCAN_OPT_API_KEY,
+      optimisticGoerli: ETHERSCAN_OPT_API_KEY
+    }
   },
   mocha: {
     timeout: 100000000,