Add hardhat-coverage and eth-gas-reporter Hardhat plugins

eth-contracts/.gitignore

@@ -1,4 +1,6 @@
 node_modules
-artifacts/**
+artifacts
 cache
-dist/**
+dist
+coverage
+coverage.json

eth-contracts/.solcover.js

@@ -0,0 +1,3 @@
+module.exports = {
+    skipFiles: ['Timelock.sol', 'Mediator.sol', 'vendor/Ownable.sol']
+};

eth-contracts/hardhat.config.ts

@@ -2,7 +2,8 @@ import { task } from "hardhat/config";
 import "@nomiclabs/hardhat-ethers";
 import "hardhat-tracer";
 import "@nomiclabs/hardhat-waffle";
-import "hardhat-ethernal";
+import "solidity-coverage";
+import "hardhat-gas-reporter";
 
 task("accounts", "Prints the list of accounts", async (args, hre) => {
   const accounts = await hre.ethers.getSigners();
@@ -21,5 +22,9 @@ export default {
         mnemonic: "test test test test test test test test test test test junk"
       }
     }
+  },
+  gasReporter: {
+    currency: 'USD',
+    enabled: (process.env.REPORT_GAS) ? true : false
   }
 };

eth-contracts/package.json

@@ -5,6 +5,8 @@
   "main": "",
   "scripts": {
     "test": "TS_NODE_FILES=true npx hardhat test",
+    "test:reportGas": "REPORT_GAS=1 TS_NODE_FILES=true npx hardhat test",
+    "coverage": "TS_NODE_FILES=true npx hardhat coverage",
     "deployLocal": "TS_NODE_FILES=true npx hardhat --network geth run scripts/deploy.ts"
   },
   "author": "",
@@ -19,8 +21,9 @@
     "ethereum-waffle": "^3.3.0",
     "ethers": "^5.1.3",
     "hardhat": "^2.1.2",
-    "hardhat-ethernal": "^0.2.3",
+    "hardhat-gas-reporter": "^1.0.4",
     "hardhat-tracer": "*",
+    "solidity-coverage": "^0.7.16",
     "ts-node": "^9.1.1",
     "typescript": "^4.2.4"
   },