unaboomer-contracts/src/Unaboomer.sol

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.13;


/******* Mint Mechanics 
.00 per unaboomer (BOOMR) - 10k supply
.02 per bomb (BOMB) - infinite supply
BOMB holders can randomly mail bombs to other owners
1 BOMB kills 1 BOOMR - BOOMR image switches to explosion after being bombed
chaos ensues until 1000 survivors - the game stops
********/

import {ERC721} from "solmate/tokens/ERC721.sol";
import {Owned} from "solmate/auth/Owned.sol";
import {LibString} from "solmate/utils/LibString.sol";

error NotOwnerOfToken();
error MaxSupplyReached();
error TooMany();
error NoContract();
error WrongEtherAmount();
error MaxAmountReached();

contract Unaboomer is Owned, ERC721 {
    using LibString for uint256;

    enum TokenState {
        LIVING,
        DEAD
    }

    mapping(uint256 => TokenState) public tokenState;

    uint256 public constant MAX_SUPPLY = 10000;
    uint256 public minted;
    string public livingURI;
    string public deadURI;

    constructor() ERC721("Unaboomer", "BOOMR") Owned(msg.sender) {}

    function mint(uint256 amount) external payable {
        if (msg.sender == tx.origin) {
            revert NoContract();
        }
        if (amount > 20) {
            revert TooMany();
        }
        if (minted + amount > MAX_SUPPLY) {
            revert MaxSupplyReached();
        }
        unchecked {
            for (uint256 i; i < amount; i++) {
                _mint(msg.sender, minted + 1);
                minted++;
            }
        }
    }

    function totalSupply() view public returns (uint256 supply) {
        return minted;
    }

    function setBaseURI(string calldata _baseURI) external onlyOwner {
        livingURI = _baseURI;
    }

    function tokenURI(uint256 _tokenId) public view override returns (string memory) {
        if (tokenState[_tokenId] == TokenState.LIVING) {
            return string(abi.encodePacked(livingURI, _tokenId.toString(), ".json"));
        } else {
            return string(abi.encodePacked(deadURI, _tokenId.toString(), ".json"));
        }
    }

    function supportsInterface(bytes4 interfaceId) public view virtual override (ERC721) returns (bool) {
        return super.supportsInterface(interfaceId);
    }
}