const ethers = require('ethers');
const { computePoolAddress } = require('@uniswap/v3-sdk');
const { Token } = require('@uniswap/sdk-core');

// Ethereum network configuration
const provider = new ethers.JsonRpcProvider('http://127.0.0.1:8545/');

const privateKey = 'ac0974bec39a17e36ba4a6b4d238ff944bacb478cbed5efcae784d7bf4f2ff80';

// Uniswap V3 contract configuration
const uniswapV3SwapRouterAddress = '0xE592427A0AEce92De3Edee1F18E0157C05861564';
const PoolFactoryContractAddress = '0x1F98431c8aD98523631AE4a59f267346ea31F984';
const quoterContractAddress = '0xb27308f9F90D607463bb33eA1BeBb41C27CE5AB6';
const uniswapV3SwapRouterABI = require('@uniswap/v3-periphery/artifacts/contracts/SwapRouter.sol/SwapRouter.json').abi;
const uniswapV3PoolABI = require('@uniswap/v3-core/artifacts/contracts/interfaces/IUniswapV3Pool.sol/IUniswapV3Pool.json').abi;
const uniswapV3QuoterAbi = require('@uniswap/v3-periphery/artifacts/contracts/lens/Quoter.sol/Quoter.json').abi;

// Token configuration
const tokenToSwapAddress = '0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2';
const tokenToReceiveAddress = '0xdAC17F958D2ee523a2206206994597C13D831ec7';

const wallet = new ethers.Wallet(privateKey, provider);

// Load the Uniswap V3 contract
const uniswapV3SwapRouterContract = new ethers.Contract(uniswapV3SwapRouterAddress, uniswapV3SwapRouterABI, wallet);
const customGasPrice = ethers.parseUnits('50', 'gwei');
let tokenToSwapAmount;
// Convert token addresses to Token instances

const test = async () => {
  try {
    const tokenToSwapProperties = await getTokenProperties(tokenToSwapAddress);
    const tokenToReceiveProperties = await getTokenProperties(tokenToReceiveAddress);
    const tokenToSwap = new Token(1, tokenToSwapAddress, Number(tokenToSwapProperties.decimals), tokenToSwapProperties.symbol, tokenToSwapProperties.name);
    const tokenToReceive = new Token(1, tokenToReceiveAddress, Number(tokenToReceiveProperties.decimals), tokenToReceiveProperties.symbol, tokenToReceiveProperties.name);
    tokenToSwapAmount = ethers.parseUnits('100', Number(tokenToSwap.decimals).toString());

    const currentPoolAddress = computePoolAddress({
      factoryAddress: PoolFactoryContractAddress,
      tokenA: tokenToSwap, // Use the Token instance
      tokenB: tokenToReceive, // Use the Token instance
      fee: 3000,
    });

    const poolContract = new ethers.Contract(currentPoolAddress, uniswapV3PoolABI, provider);

    const [token0, token1, fee] = await Promise.all([poolContract.token0(), poolContract.token1(), poolContract.fee()]);

    const quoterContract = new ethers.Contract(quoterContractAddress, uniswapV3QuoterAbi, provider);

    const data = quoterContract.interface.encodeFunctionData('quoteExactInputSingle', [token0, token1, fee, tokenToSwapAmount.toString(), 0]);
    const quotedAmountOut = await provider.call({ to: quoterContractAddress, data });
    const humanReadableAmountOut = ethers.formatUnits(quotedAmountOut, Number(tokenToReceive.decimals));
    console.log('Estimated amount out:', humanReadableAmountOut, tokenToReceive.name);
  } catch (e) {
    console.log(e);
  }
};
test();

async function executeTrade() {
  try {
    // Approve Uniswap V3 SwapRouter to spend tokenToSwap
    console.log('Approving token spend by SwapRouter…');
    const tokenToSwapContract = new ethers.Contract(tokenToSwapAddress, ['function approve(address spender, uint256 amount) external returns (bool)'], wallet);
    const approvalTx = await tokenToSwapContract.approve(uniswapV3SwapRouterAddress, tokenToSwapAmount, { gasPrice: customGasPrice, gasLimit: 25000000 });

    await approvalTx.wait();
    console.log('Token spend approval transaction confirmed.');

    const swapParams = {
      tokenIn: tokenToSwapAddress,
      tokenOut: tokenToReceiveAddress,
      fee: 3000,
      recipient: wallet.address,
      deadline: Math.floor(Date.now() / 1000) + 60 * 20,
      amountIn: tokenToSwapAmount,
      amountOutMinimum: 0,
      sqrtPriceLimitX96: 0,
    };

    console.log('Sending swap transaction…');
    const swapTx = await uniswapV3SwapRouterContract.exactInputSingle(swapParams, { gasPrice: customGasPrice, gasLimit: 25000000 });

    console.log('Swap transaction hash:', swapTx.hash);

    // Wait for transaction confirmation
    console.log('Waiting for swap transaction confirmation…');
    await swapTx.wait();
    console.log('Swap transaction confirmed!');
  } catch (e) {
    console.log(e);
  }
}

executeTrade();

async function getTokenProperties(tokenAddress) {
  const erc20ABI = ['function name() view returns (string)', 'function symbol() view returns (string)', 'function decimals() view returns (uint8)'];
  const tokenContract = new ethers.Contract(tokenAddress, erc20ABI, provider);
  const [name, symbol, decimals] = await Promise.all([tokenContract.name(), tokenContract.symbol(), tokenContract.decimals()]);
  return {
    name,
    symbol,
    decimals,
  };
}
i have this code but i receive this error , Approving token spend by SwapRouter…
TypeError: Cannot read properties of undefined (reading 'then')
    at #walkAsync (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\abi\fragments.js:576:20)
    at ParamType.walkAsync (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\abi\fragments.js:593:24)
    at C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\contract\contract.js:102:22
    at Array.map (<anonymous>)
    at resolveArgs (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\contract\contract.js:101:37)
    at populateTransaction (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\contract\contract.js:188:36)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async send (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\contract\contract.js:204:49)
    at async Proxy.approve (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\contract\contract.js:237:16)
    at async executeTrade (C:\Users\lidor\Desktop\Trade Bot\index.js:66:24)
TypeError: invalid unit (argument="unit", value="18", code=INVALID_ARGUMENT, version=6.4.1)
    at makeError (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\utils\errors.js:118:21)
    at assert (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\utils\errors.js:142:15)
    at assertArgument (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\utils\errors.js:154:5)
    at Object.parseUnits (C:\Users\lidor\Desktop\Trade Bot\node_modules\ethers\lib.commonjs\utils\units.js:66:40)
    at test (C:\Users\lidor\Desktop\Trade Bot\index.js:36:32)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5) {
  code: 'INVALID_ARGUMENT',
  argument: 'unit',
  value: '18'
} also i wanna estimate gas fee on the test function