// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;

/**
 * ============================================================================
 * Official Flattened Source Code for Hevium Launchpad Tokens (HeviumV2Token)
 * Compatible with Elysium (99901), Base (8453) & Robinhood Chain (4663)
 * Compiler Version: v0.8.24+commit.e11b9ed9
 * Optimization: Enabled (200 runs)
 * EVM Version: cancun / paris / default
 * License: MIT
 * ============================================================================
 */

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

interface IERC20Errors {
    error ERC20InsufficientBalance(address sender, uint256 balance, uint256 needed);
    error ERC20InvalidSender(address sender);
    error ERC20InvalidReceiver(address receiver);
    error ERC20InsufficientAllowance(address spender, uint256 allowance, uint256 needed);
    error ERC20InvalidApprover(address approver);
    error ERC20InvalidSpender(address spender);
}

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 value) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 value) external returns (bool);
    function transferFrom(address from, address to, uint256 value) external returns (bool);
}

interface IERC20Metadata is IERC20 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function decimals() external view returns (uint8);
}

abstract contract ERC20 is Context, IERC20, IERC20Metadata, IERC20Errors {
    mapping(address account => uint256) private _balances;
    mapping(address account => mapping(address spender => uint256)) private _allowances;

    uint256 private _totalSupply;
    string private _name;
    string private _symbol;

    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    function name() public view virtual returns (string memory) {
        return _name;
    }

    function symbol() public view virtual returns (string memory) {
        return _symbol;
    }

    function decimals() public view virtual returns (uint8) {
        return 18;
    }

    function totalSupply() public view virtual returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) public view virtual returns (uint256) {
        return _balances[account];
    }

    function transfer(address to, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, value);
        return true;
    }

    function allowance(address owner, address spender) public view virtual returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 value) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) public virtual returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, value);
        _transfer(from, to, value);
        return true;
    }

    function _transfer(address from, address to, uint256 value) internal {
        if (from == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        if (to == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(from, to, value);
    }

    function _update(address from, address to, uint256 value) internal virtual {
        if (from == address(0)) {
            _totalSupply += value;
        } else {
            uint256 fromBalance = _balances[from];
            if (fromBalance < value) {
                revert ERC20InsufficientBalance(from, fromBalance, value);
            }
            unchecked {
                _balances[from] = fromBalance - value;
            }
        }

        if (to == address(0)) {
            unchecked {
                _totalSupply -= value;
            }
        } else {
            unchecked {
                _balances[to] += value;
            }
        }

        emit Transfer(from, to, value);
    }

    function _mint(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidReceiver(address(0));
        }
        _update(address(0), account, value);
    }

    function _burn(address account, uint256 value) internal {
        if (account == address(0)) {
            revert ERC20InvalidSender(address(0));
        }
        _update(account, address(0), value);
    }

    function _approve(address owner, address spender, uint256 value) internal {
        _approve(owner, spender, value, true);
    }

    function _approve(address owner, address spender, uint256 value, bool emitEvent) internal virtual {
        if (owner == address(0)) {
            revert ERC20InvalidApprover(address(0));
        }
        if (spender == address(0)) {
            revert ERC20InvalidSpender(address(0));
        }
        _allowances[owner][spender] = value;
        if (emitEvent) {
            emit Approval(owner, spender, value);
        }
    }

    function _spendAllowance(address owner, address spender, uint256 value) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance < type(uint256).max) {
            if (currentAllowance < value) {
                revert ERC20InsufficientAllowance(spender, currentAllowance, value);
            }
            unchecked {
                _approve(owner, spender, currentAllowance - value, false);
            }
        }
    }
}

struct TokenSocials {
    string twitter;
    string telegram;
    string website;
    string discord;
    string github;
}

contract HeviumV2Token is ERC20 {
    uint256 public constant TOTAL_SUPPLY = 1_000_000_000 * 1e18;

    address public curve;
    address public immutable launchFactory;
    address public immutable deployer;

    string public description;
    string public logo;
    TokenSocials public socials;

    error NotCurveOrFactory();
    error ZeroAddress();

    event MetadataUpdated(string description, string logo);
    event SocialsUpdated(string twitter, string telegram, string website, string discord, string github);
    event CurveSet(address indexed curve);

    constructor(
        string memory _name,
        string memory _symbol,
        string memory _description,
        string memory _logo,
        address _deployer,
        address _factory
    ) ERC20(_name, _symbol) {
        if (_deployer == address(0) || _factory == address(0)) revert ZeroAddress();

        deployer = _deployer;
        launchFactory = _factory;

        description = _description;
        logo = _logo;

        _mint(_factory, TOTAL_SUPPLY);
    }

    function setCurve(address _curve) external {
        if (msg.sender != launchFactory || curve != address(0)) revert NotCurveOrFactory();
        if (_curve == address(0)) revert ZeroAddress();
        curve = _curve;
        emit CurveSet(_curve);
    }

    function burn(uint256 amount) public {
        _burn(msg.sender, amount);
    }

    function burnFrom(address account, uint256 amount) public {
        _spendAllowance(account, msg.sender, amount);
        _burn(account, amount);
    }

    function updateMetadata(string calldata _description, string calldata _logo) external {
        if (msg.sender != deployer) revert NotCurveOrFactory();
        description = _description;
        logo = _logo;
        emit MetadataUpdated(_description, _logo);
    }

    function updateSocials(TokenSocials calldata _socials) external {
        if (msg.sender != deployer && msg.sender != launchFactory) revert NotCurveOrFactory();
        socials = _socials;
        emit SocialsUpdated(_socials.twitter, _socials.telegram, _socials.website, _socials.discord, _socials.github);
    }
}