fix: prevent to load scripts before compilation and typechain

README.md

@@ -98,6 +98,12 @@ Deploy the contracts to Hardhat Network:
 $ yarn deploy --greeting "Bonjour, le monde!"
 ```
 
+Deploy the contracts to Rinkeby Network and Verify deployed contract on etherscan
+
+```sh
+$ yarn deploy --greeting "Bonjour, le monde!" --network rinkeby --verify
+```
+
 ## Syntax Highlighting
 
 If you use VSCode, you can enjoy syntax highlighting for your Solidity code via the

hardhat.config.ts

@@ -1,11 +1,13 @@
+import path from "path";
+import fs from "fs";
 import "@nomiclabs/hardhat-waffle";
+import "@nomiclabs/hardhat-etherscan";
 import "@typechain/hardhat";
 import "hardhat-gas-reporter";
 import "solidity-coverage";
 
 import "./tasks/accounts";
 import "./tasks/clean";
-import "./tasks/deployers";
 
 import { resolve } from "path";
 
@@ -25,6 +27,21 @@ const chainIds = {
   ropsten: 3,
 };
 
+const SKIP_LOAD = process.env.SKIP_LOAD === "true";
+const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || "";
+
+// Prevent to load scripts before compilation and typechain
+if (!SKIP_LOAD) {
+  ["deployers"].forEach(folder => {
+    const tasksPath = path.join(__dirname, "tasks", folder);
+    fs.readdirSync(tasksPath)
+      .filter(pth => pth.includes(".ts"))
+      .forEach(task => {
+        require(`${tasksPath}/${task}`);
+      });
+  });
+}
+
 // Ensure that we have all the environment variables we need.
 const mnemonic: string | undefined = process.env.MNEMONIC;
 if (!mnemonic) {
@@ -93,6 +110,9 @@ const config: HardhatUserConfig = {
       },
     },
   },
+  etherscan: {
+    apiKey: ETHERSCAN_API_KEY,
+  },
   typechain: {
     outDir: "typechain",
     target: "ethers-v5",

package.json

@@ -16,6 +16,7 @@
     "@ethersproject/bytes": "^5.4.0",
     "@ethersproject/providers": "^5.4.3",
     "@nomiclabs/hardhat-ethers": "^2.0.2",
+    "@nomiclabs/hardhat-etherscan": "^2.1.5",
     "@nomiclabs/hardhat-waffle": "^2.0.1",
     "@typechain/ethers-v5": "^7.0.1",
     "@typechain/hardhat": "^2.3.0",
@@ -68,7 +69,7 @@
   "scripts": {
     "clean": "hardhat clean",
     "commit": "git-cz",
-    "compile": "hardhat compile",
+    "compile": "SKIP_LOAD=true hardhat compile",
     "coverage": "cross-env CODE_COVERAGE=true hardhat coverage --solcoverjs ./.solcover.js --temp artifacts --testfiles \"./test/**/*.ts\"",
     "deploy": "hardhat deploy:Greeter",
     "lint": "yarn run lint:sol && yarn run lint:ts && yarn run prettier:check",

tasks/deployers/greeter.ts

@@ -1,13 +1,25 @@
 import { task } from "hardhat/config";
-import { TaskArguments } from "hardhat/types";
-
 import { Greeter, Greeter__factory } from "../../typechain";
 
 task("deploy:Greeter")
+  .addFlag("verify", "Verify contracts at Etherscan")
   .addParam("greeting", "Say hello, be nice")
-  .setAction(async function (taskArguments: TaskArguments, { ethers }) {
-    const greeterFactory: Greeter__factory = await ethers.getContractFactory("Greeter");
-    const greeter: Greeter = <Greeter>await greeterFactory.deploy(taskArguments.greeting);
+  .setAction(async ({ verify, greeting }, hre) => {
+    const greeterFactory: Greeter__factory = await hre.ethers.getContractFactory("Greeter");
+    const greeter: Greeter = <Greeter>await greeterFactory.deploy(greeting);
     await greeter.deployed();
     console.log("Greeter deployed to: ", greeter.address);
+
+    if (verify) {
+      // We need to wait a little bit to verify the contract after deployment
+      void delay(30000);
+      await hre.run("verify:verify", {
+        address: greeter.address,
+        constructorArguments: [greeting],
+      });
+    }
   });
+
+function delay(ms: number) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}