chore: add etherscan verification after deployments

hardhat.config.ts

@@ -1,4 +1,5 @@
 import "@nomiclabs/hardhat-ethers"
+import "@nomiclabs/hardhat-etherscan"
 import "@nomiclabs/hardhat-waffle"
 import "@typechain/hardhat"
 import { config as dotenvConfig } from "dotenv"
@@ -64,6 +65,9 @@ const hardhatConfig: HardhatUserConfig = {
     typechain: {
         outDir: config.paths.build.typechain,
         target: "ethers-v5"
+    },
+    etherscan: {
+        apiKey: process.env.ETHERSCAN_API_KEY
     }
 }
 

scripts/deploy-all.ts

@@ -12,6 +12,9 @@ async function main() {
             name: `Verifier${treeDepth}`,
             address
         })
+
+        // Verify verifier.
+        await run("verify:verify", { address })
     }
 
     // Deploy Semaphore.
@@ -19,6 +22,14 @@ async function main() {
         verifiers: deployedContracts.map((c) => ({ merkleTreeDepth: c.name.substring(8), contractAddress: c.address }))
     })
 
+    // Verify Semaphore.
+    await run("verify:verify", {
+        address,
+        constructorArguments: [
+            deployedContracts.map((c) => ({ merkleTreeDepth: c.name.substring(8), contractAddress: c.address }))
+        ]
+    })
+
     deployedContracts.push({
         name: `Semaphore`,
         address