Allows sniping pool creation events for Uniswap V2-styled routers in under 250 LOC. Monitors UniswapV2Factory for PairCreated events, verifies that one of the tokens of pair matches your desired sniping tokens, and automatically submits a purchase transaction (with initial token for route === base chain token, eg. ETH or Matic).

This repo is a proof-of-concept implementation of sniping the Klima pool launch on Sushiswap Router V2 — Polygon. If you do not want to test on Polygon Mainnet, do not apply the postinstall patch and change src/sniper.ts:L73 to desired network.

Credits: @joshstevens19 for simple-uniswap-sdk

# Clone repo
git clone https://github.com/anish-agnihotri/pool-sniper

# Install dependencies (and apply postinstall script)
npm install

# Update environment variables
cp .env.sample > .env
vim .env

# Run pool-sniper
npm run start

The Polygon patch is automatically applied postinstall. You can remove this and update src/sniper.ts:L73 to test against a testnet.

The easiest way to test locally is:

1. Deploy a new ERC20 and mint yourself some tokens:

// SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/presets/ERC20PresetMinterPauser.sol"; // OZ: ERC20

contract Tester is ERC20 {
    constructor(string memory _name, string memory _symbol) ERC20(_name, _symbol) {
        _mint(msg.sender, 1e18 * 1000);
    }
}

2. Copy the deployed address and add to .env
3. Run the sniper (npm run start)
4. Create a new UniswapV2-styled pool with deployed ERC20 and base chain asset (eg. ETH/Matic) and watch your sniper pick up the new pool creation

Unlicense