​
Setting Up Your Project

First, given this example and most quickstart documentation will be relying on Forge, make sure you have the latest version of forge installed.

Now that you have forge installed, create and navigate to a new directory for your ERC404 project and install ERC404.

forge init
forge install pandora-labs-org/erc404

​
Creating Your ERC404

An example contract that inherits ERC404 has been provided below. This is just a minimal implementation for quick setup.

ExampleERC404.sol
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";
import {ERC404} from "erc404/ERC404.sol";

contract ExampleERC404 is Ownable, ERC404 {
  constructor(
    string memory name_,
    string memory symbol_,
    uint8 decimals_,
    uint256 maxTotalSupplyERC721_,
    address initialOwner_
  ) ERC404(name_, symbol_, decimals_) Ownable(initialOwner_) {
    _setERC721TransferExempt(initialOwner_, true);
    _mintERC20(initialOwner_, maxTotalSupplyERC721_ * units, false);
  }

  function tokenURI(uint256 id_) public pure override returns (string memory) {
    return string.concat("https://example.com/token/", Strings.toString(id_));
  }

  function setERC721TransferExempt(address account_, bool value_) external onlyOwner {
    _setERC721TransferExempt(account_, value_);
  }
}

That’s it, your all set up with your first ERC404 contract!

​
Deploying

To deploy, we’ll again use our current project and set up a simple script, provided below.

contract Deploy is Script {
    string memory name = "Example";
    string memory symbol = "EXMPL";
    uint8 decimals = 18;
    uint256 maxTotalSupplyERC721 = 10000;

    modifier broadcast(address deployer) {
        vm.startBroadcast(deployer);
        _;
        vm.stopBroadcast();
    }

    function run() external override {
        deploy(<Your Deployer Address>);
    }

    function deploy(address deployer) public broadcast(deployer) {
        new ExampleERC404(name, symbol, decimals, maxTotalSupplyERC721, deployer);
    }
}

Now, you’ll need to run the script through the following command, having defined the deployer private key and rpc endpoint in your local environment.

forge script ./script/Deploy.s.sol:Deploy --broadcast --rpc-url $MAINNET_RPC_URL --private-key $PRIVATE_KEY -vvvv
IntroductionContributing