diff --git a/index.test.js b/index.test.js
index 7a692c5..a8bb324 100644
--- a/index.test.js
+++ b/index.test.js
@@ -1,93 +1,79 @@
-const { ethers } = require("ethers")
-const Ganache = require("ganache-core")
+const { ethers } = require("ethers");
+const Ganache = require("ganache-core");
 
-const MAINNET_NODE_URL = "<insert mainnet node url here>"
-const PRIV_KEY = "<insert ANY private key here>"
+const MAINNET_NODE_URL = "<insert mainnet node url here>";
+const PRIV_KEY = "<insert ANY private key here>";
+const GAS_LIMIT = 2000000;
 
 const startChain = async () => {
-  const ganache = Ganache.provider({
-    fork: MAINNET_NODE_URL,
-    network_id: 1,
-    accounts: [
-      {
-        secretKey: PRIV_KEY,
-        balance: ethers.utils.hexlify(ethers.utils.parseEther("1000")),
-      },
-    ],
-  })
+	const ganache = Ganache.provider({
+		fork: MAINNET_NODE_URL,
+		network_id: 1,
+		accounts: [
+			{
+				secretKey: PRIV_KEY,
+				balance: ethers.utils.hexlify(ethers.utils.parseEther("1000")),
+			},
+		],
+		gasLimit: GAS_LIMIT,
+	});
 
-  const provider = new ethers.providers.Web3Provider(ganache)
-  const wallet = new ethers.Wallet(PRIV_KEY, provider)
+	const provider = new ethers.providers.Web3Provider(ganache);
+	const wallet = new ethers.Wallet(PRIV_KEY, provider);
 
-  return wallet
-}
+	return wallet;
+};
 
-jest.setTimeout(100000)
-const uniswap = require("@studydefi/money-legos/uniswap")
-const erc20 = require("@studydefi/money-legos/erc20")
+jest.setTimeout(100000);
+const uniswap = require("@studydefi/money-legos/uniswap");
+const erc20 = require("@studydefi/money-legos/erc20");
 
 describe("do some tests", () => {
-  let wallet
+	let wallet;
 
-  beforeAll(async () => {
-    wallet = await startChain()
-  })
+	beforeAll(async () => {
+		wallet = await startChain();
+	});
 
-  test("initial DAI balance of 0", async () => {
-    const daiContract = new ethers.Contract(
-      erc20.dai.address,
-      erc20.dai.abi,
-      wallet,
-    )
-    const daiBalanceWei = await daiContract.balanceOf(wallet.address)
-    const daiBalance = ethers.utils.formatUnits(daiBalanceWei, 18)
-    expect(parseFloat(daiBalance)).toBe(0)
-  })
+	test("initial DAI balance of 0", async () => {
+		const daiContract = new ethers.Contract(erc20.dai.address, erc20.dai.abi, wallet);
+		const daiBalanceWei = await daiContract.balanceOf(wallet.address);
+		const daiBalance = ethers.utils.formatUnits(daiBalanceWei, 18);
+		expect(parseFloat(daiBalance)).toBe(0);
+	});
 
-  test("initial ETH balance of 1000 ETH", async () => {
-    const ethBalanceWei = await wallet.getBalance()
-    const ethBalance = ethers.utils.formatEther(ethBalanceWei)
-    expect(parseFloat(ethBalance)).toBe(1000)
-  })
+	test("initial ETH balance of 1000 ETH", async () => {
+		const ethBalanceWei = await wallet.getBalance();
+		const ethBalance = ethers.utils.formatEther(ethBalanceWei);
+		expect(parseFloat(ethBalance)).toBe(1000);
+	});
 
-  test("buy DAI from Uniswap", async () => {
-    // 1. instantiate contracts
-    const daiContract = new ethers.Contract(
-      erc20.dai.address,
-      erc20.dai.abi,
-      wallet,
-    )
-    const uniswapFactoryContract = new ethers.Contract(
-      uniswap.factory.address,
-      uniswap.factory.abi,
-      wallet,
-    )
-    const daiExchangeAddress = await uniswapFactoryContract.getExchange(
-      erc20.dai.address,
-    )
-    const daiExchangeContract = new ethers.Contract(
-      daiExchangeAddress,
-      uniswap.exchange.abi,
-      wallet,
-    )
+	test("buy DAI from Uniswap", async () => {
+		// 1. instantiate contracts
+		const daiContract = new ethers.Contract(erc20.dai.address, erc20.dai.abi, wallet);
+		const uniswapFactoryContract = new ethers.Contract(uniswap.factory.address, uniswap.factory.abi, wallet);
+		const daiExchangeAddress = await uniswapFactoryContract.getExchange(erc20.dai.address, {
+			gasLimit: GAS_LIMIT,
+		});
+		const daiExchangeContract = new ethers.Contract(daiExchangeAddress, uniswap.exchange.abi, wallet);
 
-    // 2. do the actual swapping
-    await daiExchangeContract.ethToTokenSwapInput(
-      1, // min amount of token retrieved
-      2525644800, // random timestamp in the future (year 2050)
-      {
-        gasLimit: 4000000,
-        value: ethers.utils.parseEther("5"),
-      },
-    )
+		// 2. do the actual swapping
+		await daiExchangeContract.ethToTokenSwapInput(
+			1, // min amount of token retrieved
+			2525644800, // random timestamp in the future (year 2050)
+			{
+				gasLimit: GAS_LIMIT,
+				value: ethers.utils.parseEther("5"),
+			}
+		);
 
-    // util function
-    const fromWei = (x) => ethers.utils.formatUnits(x, 18)
+		// util function
+		const fromWei = (x) => ethers.utils.formatUnits(x, 18);
 
-    // 3. check DAI balance
-    const daiBalanceWei = await daiContract.balanceOf(wallet.address)
-    const daiBalance = parseFloat(fromWei(daiBalanceWei))
-    expect(daiBalance).toBeGreaterThan(0)
-    console.log("daiBalance", daiBalance)
-  })
-})
+		// 3. check DAI balance
+		const daiBalanceWei = await daiContract.balanceOf(wallet.address);
+		const daiBalance = parseFloat(fromWei(daiBalanceWei));
+		expect(daiBalance).toBeGreaterThan(0);
+		console.log("daiBalance", daiBalance);
+	});
+});