simple_uniswap_v3_swap

swap.ts

//1. make sure enough funds
//2. make sure the pair tokens have allowance to uniswap router v2 
//3. find out the best pool and it's fee

import {
  SWAP_ROUTER_02_ADDRESSES
} from "@uniswap/sdk-core";
import { swapRouter02ABI } from "../../data/swapRouter02ABI";

const swapRouter = new ethers.Contract(
        SWAP_ROUTER_02_ADDRESSES(Number(chainId)),
        swapRouter02ABI,
        signer
      );

let txParams = {
            tokenIn: tokenIn,
            tokenOut: tokenOut,
            fee: poolFee,
            recipient: signer.address,
            deadline: Math.floor(Date.now() / 1000) + 60 * 10,
            amountIn: amountIn,
            amountOutMinimum: BigInt(0),
            sqrtPriceLimitX96: 0,
          };

console.log("txParams", txParams);

const tx = await swapRouter.exactInputSingle(txParams);
console.log("Transaction hash:", tx.hash);
await tx.wait();
const receipt = await ethersProvider.getTransactionReceipt(tx.hash);
if (receipt && receipt.status === 1) {
  console.log("======> Transaction successful! <======");
}else{
  console.log("you fucked up somewhere...");
}