Add new chains: abstract-testnet, corn and corn-testnet (#1774)

* block explorers and public rpcs for new chains

* rename testnets

---------

Co-authored-by: Ali Kim <alikim@gmail.com>
Co-authored-by: YaroShkvorets <shkvorets@gmail.com>

.changeset/swift-bottles-trade.md

@@ -0,0 +1,5 @@
+---
+'@graphprotocol/graph-cli': patch
+---
+
+Add new chains: `abstract-testnet`, `corn` and `corn-testnet`

packages/cli/src/command-helpers/abi.ts

@@ -352,6 +352,12 @@ const getEtherscanLikeAPIUrl = (network: string) => {
       return 'https://unichain-sepolia.blockscout.com/api';
     case 'lens-testnet':
       return 'https://block-explorer-api.testnet.lens.dev/api';
+    case 'abstract-sepolia':
+      return 'https://block-explorer-api.testnet.abs.xyz/api';
+    case 'corn':
+      return 'https://maizenet-explorer.usecorn.com/api';
+    case 'corn-sepolia':
+      return 'https://testnet-explorer.usecorn.com/api';
     default:
       return `https://api-${network}.etherscan.io/api`;
   }
@@ -510,6 +516,12 @@ const getPublicRPCEndpoint = (network: string) => {
       return 'https://sepolia.unichain.org';
     case 'lens-testnet':
       return 'https://api.staging.lens.zksync.dev';
+    case 'abstract-sepolia':
+      return 'https://api.testnet.abs.xyz';
+    case 'corn':
+      return 'https://maizenet-rpc.usecorn.com';
+    case 'corn-sepolia':
+      return 'https://testnet-rpc.usecorn.com';
     default:
       throw new Error(`Unknown network: ${network}`);
   }