Deploy Uniswap V2 to Sepolia

This is a Hardhat setup to deploy the necessary contracts of Uniswap (vulnerable).

Note: The repository ./contracts/core/UniswapV2Pair.sol contains vulnerabilities related to K-value and lock. It should not be used directly in a production environment; it is intended only for educational purposes and reference.

Get Started

Install packages:

yarn

Modify the private key and RPC as you wish in the hardhat.config.js file.

Deploy the contracts and Interact the contracts

yarn hardhat run --network sepolia scripts/deploy-factory.js

If encountered

Adding Liquidity...
Error: cannot estimate gas;

Because Uniswap uses an init_code hash that was changed in the UniswapV2Library contract, you need to obtain the bytecode from ./artifacts/contracts/core/UniswapV2Pair.sol/UniswapV2Pair.json and calculate the init code using Keccak-256 Online Tools with Input type Hex (Remove the leading "0x" from the input.). Afterward, replace the init code in ./contracts/periphery/libraries/UniswapV2Library.sol.

    // calculates the CREATE2 address for a pair without making any external calls
    function pairFor(address factory, address tokenA, address tokenB) internal pure returns (address pair) {
        (address token0, address token1) = sortTokens(tokenA, tokenB);
        pair = address(uint(keccak256(abi.encodePacked(
                hex'ff',
                factory,
                keccak256(abi.encodePacked(token0, token1)),
                hex'eecc85ed9fa5cd0e6b6a2b30ac81f809a51e9d22908fee474a8cd15c539b41cb' // init code hash
            ))));
    }

Run it again

yarn hardhat run --network sepolia scripts/deploy-factory.js

verify contract:

yarn hardhat verify-contract --network sepolia