EVM: Add uniswap test script

examples/demo-rollup/tests/evm/uniswap/.gitignore

@@ -0,0 +1,11 @@
+node_modules
+.env
+coverage
+coverage.json
+typechain
+typechain-types
+
+# Hardhat files
+cache
+artifacts
+

examples/demo-rollup/tests/evm/uniswap/Readme.md

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+### Uniswap demo folow these steps:
+
+1. Deploys `uniswap-v2` contracts.
+2. Adds liquidity to the USDT <> USDC pair.
+3. Executes a swap.
+
+### How to execute the demo:
+1. Install `anvil` see: https://github.com/foundry-rs/foundry
+2. Run `npm install` inside uniswap directory.
+3. Start `anvil` in another terminal.
+4. Deploy `uniswap-v2` contracts and add liquidity with:
+`npx hardhat run --network localhost scripts/01_deploy.js`
+3. Execute a swap:
+`npx hardhat run --network localhost scripts/02_swap.js` 

examples/demo-rollup/tests/evm/uniswap/WETH9.json

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+{
+    "bytecode": 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+    "abi": [
+      {
+        "constant": true,
+        "inputs": [],
+        "name": "name",
+        "outputs": [{ "name": "", "type": "string" }],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+      },
+      {
+        "constant": false,
+        "inputs": [
+          { "name": "guy", "type": "address" },
+          { "name": "wad", "type": "uint256" }
+        ],
+        "name": "approve",
+        "outputs": [{ "name": "", "type": "bool" }],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+      },
+      {
+        "constant": true,
+        "inputs": [],
+        "name": "totalSupply",
+        "outputs": [{ "name": "", "type": "uint256" }],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+      },
+      {
+        "constant": false,
+        "inputs": [
+          { "name": "src", "type": "address" },
+          { "name": "dst", "type": "address" },
+          { "name": "wad", "type": "uint256" }
+        ],
+        "name": "transferFrom",
+        "outputs": [{ "name": "", "type": "bool" }],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+      },
+      {
+        "constant": false,
+        "inputs": [{ "name": "wad", "type": "uint256" }],
+        "name": "withdraw",
+        "outputs": [],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+      },
+      {
+        "constant": true,
+        "inputs": [],
+        "name": "decimals",
+        "outputs": [{ "name": "", "type": "uint8" }],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+      },
+      {
+        "constant": true,
+        "inputs": [{ "name": "", "type": "address" }],
+        "name": "balanceOf",
+        "outputs": [{ "name": "", "type": "uint256" }],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+      },
+      {
+        "constant": true,
+        "inputs": [],
+        "name": "symbol",
+        "outputs": [{ "name": "", "type": "string" }],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+      },
+      {
+        "constant": false,
+        "inputs": [
+          { "name": "dst", "type": "address" },
+          { "name": "wad", "type": "uint256" }
+        ],
+        "name": "transfer",
+        "outputs": [{ "name": "", "type": "bool" }],
+        "payable": false,
+        "stateMutability": "nonpayable",
+        "type": "function"
+      },
+      {
+        "constant": false,
+        "inputs": [],
+        "name": "deposit",
+        "outputs": [],
+        "payable": true,
+        "stateMutability": "payable",
+        "type": "function"
+      },
+      {
+        "constant": true,
+        "inputs": [
+          { "name": "", "type": "address" },
+          { "name": "", "type": "address" }
+        ],
+        "name": "allowance",
+        "outputs": [{ "name": "", "type": "uint256" }],
+        "payable": false,
+        "stateMutability": "view",
+        "type": "function"
+      },
+      { "payable": true, "stateMutability": "payable", "type": "fallback" },
+      {
+        "anonymous": false,
+        "inputs": [
+          { "indexed": true, "name": "src", "type": "address" },
+          { "indexed": true, "name": "guy", "type": "address" },
+          { "indexed": false, "name": "wad", "type": "uint256" }
+        ],
+        "name": "Approval",
+        "type": "event"
+      },
+      {
+        "anonymous": false,
+        "inputs": [
+          { "indexed": true, "name": "src", "type": "address" },
+          { "indexed": true, "name": "dst", "type": "address" },
+          { "indexed": false, "name": "wad", "type": "uint256" }
+        ],
+        "name": "Transfer",
+        "type": "event"
+      },
+      {
+        "anonymous": false,
+        "inputs": [
+          { "indexed": true, "name": "dst", "type": "address" },
+          { "indexed": false, "name": "wad", "type": "uint256" }
+        ],
+        "name": "Deposit",
+        "type": "event"
+      },
+      {
+        "anonymous": false,
+        "inputs": [
+          { "indexed": true, "name": "src", "type": "address" },
+          { "indexed": false, "name": "wad", "type": "uint256" }
+        ],
+        "name": "Withdrawal",
+        "type": "event"
+      }
+    ]
+}
+

examples/demo-rollup/tests/evm/uniswap/contracts/Tether.sol

@@ -0,0 +1,12 @@
+pragma solidity ^0.8.0;
+
+import '@openzeppelin/contracts/token/ERC20/ERC20.sol';
+import "@openzeppelin/contracts/access/Ownable.sol";
+
+contract Tether is ERC20, Ownable {
+  constructor() ERC20('Tether', 'USDT') {}
+
+  function mint(address to, uint256 amount) public onlyOwner {
+    _mint(to, amount);
+  }
+}

examples/demo-rollup/tests/evm/uniswap/contracts/UsdCoin.sol

@@ -0,0 +1,12 @@
+pragma solidity ^0.8.0;
+
+import '@openzeppelin/contracts/token/ERC20/ERC20.sol';
+import "@openzeppelin/contracts/access/Ownable.sol";
+
+contract UsdCoin is ERC20, Ownable {
+  constructor() ERC20('UsdCoin', 'USDC') {}
+
+  function mint(address to, uint256 amount) public onlyOwner {
+    _mint(to, amount);
+  }
+}

examples/demo-rollup/tests/evm/uniswap/hardhat.config.js

@@ -0,0 +1,15 @@
+require("@nomiclabs/hardhat-ethers");
+
+/** @type import('hardhat/config').HardhatUserConfig */
+module.exports = {
+  solidity: {
+    version: "0.8.17",
+    settings: {
+      optimizer: {
+        enabled: true,
+        runs: 5000,
+        details: { yul: false },
+      },
+    }
+  },
+};