imp(tests): integration tests setup (#1196)

* first pass

* latest

* working tests

* github actions

* remove unnecessary change

* remove unnecessary steps

* remove unnecessary import

* remove unnecessary change

* Update .github/workflows/test.yml

Co-authored-by: yihuang <huang@crypto.com>

* update .gitignore

* update github actions

* change evm denomination

* change evm denomination

* send tests to tests folder

* Delete result

* update go version

Co-authored-by: yihuang <huang@crypto.com>
Co-authored-by: Federico Kunze Küllmer <31522760+fedekunze@users.noreply.github.com>

tests/integration_tests/contracts/.gitignore

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+node_modules
+.env
+coverage
+coverage.json
+typechain
+typechain-types
+
+#Hardhat files
+cache
+artifacts
+

tests/integration_tests/contracts/README.md

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+# Sample Hardhat Project
+
+This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a script that deploys that contract.
+
+Try running some of the following tasks:
+
+```shell
+npx hardhat help
+npx hardhat test
+GAS_REPORT=true npx hardhat test
+npx hardhat node
+npx hardhat run scripts/deploy.js
+```

tests/integration_tests/contracts/contracts/TestERC20.sol

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+pragma solidity 0.8.10;
+import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract TestERC20A is ERC20 {
+
+constructor() public ERC20("TestERC20", "Test") {
+_mint(msg.sender, 100000000000000000000000000);
+}
+}

tests/integration_tests/contracts/hardhat.config.ts

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+import { HardhatUserConfig } from "hardhat/config";
+import "hardhat-typechain";
+
+const config: HardhatUserConfig = {
+  solidity: {
+    compilers: [
+      {
+        version: "0.8.10",
+        settings: {
+          optimizer: {
+            enabled: true
+          }
+        }
+      },
+    ],
+  },
+  typechain: {
+    outDir: "typechain",
+    target: "ethers-v5",
+  },
+};
+
+export default config;

tests/integration_tests/contracts/package.json

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+{
+  "name": "contracts",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "typechain": "npx hardhat typechain"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@nomiclabs/hardhat-ethers": "^2.1.0",
+    "@nomiclabs/hardhat-waffle": "^2.0.3",
+    "@openzeppelin/contracts": "^4.7.0",
+    "@typechain/ethers-v5": "^5.0.0",
+    "hardhat": "^2.10.1",
+    "hardhat-typechain": "^0.3.5",
+    "ts-generator": "^0.1.1",
+    "typechain": "^4.0.3"
+  },
+  "devDependencies": {
+    "ts-node": "^10.9.1",
+    "typescript": "^4.7.4"
+  }
+}

tests/integration_tests/contracts/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es2020",
+    "module": "commonjs",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true
+  }
+}