BlockmanCodes · August 11, 2023 01:31 · Aug 11, 2023 · Aug 11, 2023
diff --git a/01_impersonateSigner.js b/01_impersonateSigner.js
@@ -0,0 +1,82 @@
+const SwapRouterArtifact = require('@uniswap/v3-periphery/artifacts/contracts/SwapRouter.sol/SwapRouter.json')
+
+const erc20Abi = [
+    {
+        "inputs": [
+            {"internalType": "address", "name": "spender", "type": "address"},
+            {"internalType": "uint256", "name": "amount", "type": "uint256"}
+        ],
+        "name": "approve",
+        "outputs": [{"internalType": "bool", "name": "", "type": "bool"}],
+        "stateMutability": "nonpayable", "type": "function"
+    },
+    {
+        "inputs": [{"internalType": "address", "name": "account", "type": "address"}],
+        "name": "balanceOf",
+        "outputs": [{"internalType": "uint256", "name": "", "type": "uint256"}],
+        "stateMutability": "view",
+        "type": "function"
+    }
+]
+
+const hardhat = require("hardhat")
+const provider = hardhat.ethers.provider
+const RECIPIENT = '0xAb5801a7D398351b8bE11C439e05C5B3259aeC9B'
+
+
+const wethAddress = '0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2'
+const usdcAddress = '0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48'
+const routerAddress = '0xE592427A0AEce92De3Edee1F18E0157C05861564'
+const weth = new hardhat.ethers.Contract(wethAddress, erc20Abi, provider)
+const usdc = new hardhat.ethers.Contract(usdcAddress, erc20Abi, provider)
+const router =  new hardhat.ethers.Contract(routerAddress, SwapRouterArtifact.abi, provider)
+
+
+const logBalances = async () => {
+    const wethBalance = await weth.balanceOf(RECIPIENT)
+    const usdcBalance = await usdc.balanceOf(RECIPIENT)
+    console.log('wethBalance', hardhat.ethers.utils.formatUnits(wethBalance, 18))
+    console.log('usdcBalance', hardhat.ethers.utils.formatUnits(usdcBalance, 6))
+}
+
+
+const main = async () => {
+    const signer = await hardhat.ethers.getImpersonatedSigner(RECIPIENT);
+
+    console.log('------------ Time 0')
+    await logBalances()
+
+    const tokensIn = '10'
+    const amountIn = hardhat.ethers.utils.parseUnits(tokensIn, 18)
+    const gasLimit = 1_000_000
+
+    await weth.connect(signer).approve(router.address, amountIn)
+
+    const params = {
+        tokenIn: weth.address,
+        tokenOut: usdc.address,
+        recipient: RECIPIENT,
+        deadline: Math.floor(Date.now() / 1000 + (10 * 60)),
+        amountIn,
+        fee: 500,
+        amountOutMinimum: 0,
+        sqrtPriceLimitX96: 0,
+    }
+
+    const txInput = await router.connect(signer).exactInputSingle(params, { gasLimit })
+    await txInput.wait()
+
+    console.log('------------ Time 1')
+    await logBalances()
+}
+
+/*
+    node scripts/01_impersonateSigner.js
+*/
+
+main()
+    .then(() => process.exit(0))
+    .catch((error) => {
+        console.error(error);
+        process.exit(1);
+    });
diff --git a/hardhat.config.js b/hardhat.config.js
@@ -0,0 +1,13 @@
+require("@nomiclabs/hardhat-waffle");
+
+/** @type import('hardhat/config').HardhatUserConfig */
+module.exports = {
+  solidity: "0.8.18",
+  networks: {
+    hardhat: {
+      forking: {
+        url: <YOUR_INFURA_URL>
+      }
+    }
+  }
+};
diff --git a/package.json b/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "YouTubeTutorials",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@nomiclabs/hardhat-ethers": "^2.2.3",
+    "@nomiclabs/hardhat-waffle": "^2.0.6",
+    "@types/sinon-chai": "^3.2.9",
+    "@uniswap/sdk": "^3.0.3",
+    "@uniswap/sdk-core": "^4.0.2",
+    "@uniswap/v3-core": "^1.0.1",
+    "@uniswap/v3-periphery": "^1.4.3",
+    "@uniswap/v3-sdk": "^3.9.0",
+    "ethereum-waffle": "^4.0.10",
+    "ethers": "^5.7.2",
+    "hardhat": "^2.14.0"
+  }
+}