Support parsing full path contract name from block explorers (#1771)

* Replace regex with index and substring

In case name of the file doesn't match the actual contract name,
the regex would not be valid.

Instead, we just pick the contract name following colon.

Author: 0237h

.changeset/cyan-spoons-greet.md

@@ -0,0 +1,5 @@
+---
+'@graphprotocol/graph-cli': patch
+---
+
+Support parsing full path contract name from block explorers

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

@@ -151,7 +151,13 @@ export const getContractNameForAddress = async (
 ): Promise<string> => {
   try {
     const contractSourceCode = await fetchSourceCodeFromEtherscan(network, address);
-    const contractName = contractSourceCode.result[0].ContractName;
+    let contractName: string = contractSourceCode.result[0].ContractName;
+
+    // Some explorers will return the full path of the contract instead of just the name
+    // Example: contracts/SyncSwapRouter.sol:SyncSwapRouter
+    if (contractName.includes(':'))
+      contractName = contractName.substring(contractName.lastIndexOf(':') + 1);
+
     logger('Successfully getContractNameForAddress. contractName: %s', contractName);
     return contractName;
   } catch (error) {