feat: finish up challenges

packages/hardhat/hardhat.config.ts

@@ -39,7 +39,7 @@ const config: HardhatUserConfig = {
       },
     ],
   },
-  defaultNetwork: "localhost",
+  defaultNetwork: "sepolia",//"localhost",
   namedAccounts: {
     deployer: {
       // By default, it will take the first Hardhat account as the deployer
@@ -47,10 +47,10 @@ const config: HardhatUserConfig = {
     },
   },
   networks: {
-    mainnet: {
+    /*mainnet: {
       url: "https://mainnet.rpc.buidlguidl.com",
       accounts: [deployerPrivateKey],
-    },
+    },*/
     sepolia: {
       url: `https://eth-sepolia.g.alchemy.com/v2/${providerApiKey}`,
       accounts: [deployerPrivateKey],