misc: add script to deploy mock ERC20 tokens

contracts/mocks/MockERC20.sol

@@ -17,6 +17,7 @@ contract MockERC20 is ERC20PermitUpgradeable {
   }
 
   function mint(address account, uint256 amount) public {
+    require(amount < 1e22, "Greedy.");
     _mint(account, amount);
   }
 }

hardhat.config.ts

@@ -9,6 +9,8 @@ import "hardhat-prettier";
 import * as fs from 'fs';
 import * as dotenv from 'dotenv'
 
+import './tasks/deployERC20'
+
 dotenv.config()
 
 const mnemonic = fs.existsSync('.secret')

tasks/deployERC20.ts

@@ -0,0 +1,26 @@
+import { task, types } from "hardhat/config";
+import "@nomiclabs/hardhat-waffle";
+
+// Example execution
+// npx hardhat deployERC20 --decimals 18 --name QuickSwap --symbol QUICK --network mumbai
+task("deployERC20", "Deploy a MockERC20")
+  .addParam('name', 'Token name', undefined, types.string)
+  .addParam('symbol', 'Token symbol', undefined, types.string)
+  .addParam('decimals', 'Token decimals', 18, types.string)
+  .setAction(async ({name, symbol, decimals}, hre) => {
+
+
+  const ERC20 = await hre.ethers.getContractFactory("MockERC20");
+  const erc20 = await ERC20.deploy();
+
+  await erc20.deployed();
+  console.log(`New mock ERC20 deployed at ${erc20.address} 🍜`)
+
+  console.log(`Setting token detail...  🍨`)
+  await erc20.init(name, symbol, decimals)
+
+  await hre.run("verify:verify", {
+    address: erc20.address, 
+    network: hre.ethers.provider.network
+  })
+});