LaunchToken

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.28;

/*
    FLETCH (FLETCH)

    Twitter : https://x.com/fletch_xyz
    Website : https://fletchapp.xyz/
    Logo    : https://n.uguu.se/UFZmTlfj.jpg
*/
import {ERC20}   from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Base64}  from "@openzeppelin/contracts/utils/Base64.sol";

contract LaunchToken is ERC20, Ownable {
    // Metadata publique on-chain
    string public constant TWITTER = "https://x.com/fletch_xyz";
    string public constant WEBSITE = "https://fletchapp.xyz/";
    string public constant LOGO_URI = "https://n.uguu.se/UFZmTlfj.jpg";
    string public constant DESCRIPTION = "FLETCH - build e5999041e9b3445b";

    // Salts uniques par deploy (bytecode differe substantiellement a chaque compile)
    bytes32 public constant LAUNCH_SALT = 0x35a9ac66d42fc9d2c3cc435c7f42432abceac7eddb9e3ae55d602951a0a514f9;
    bytes32 public constant DEPLOY_NONCE = 0x59afdd22716f077e176740316ec336e1d2ef5f3f8eb93d4d31614c6440dda698;
    string public constant BUILD_ID = "e5999041e9b3445b";

    uint256 public constant MAX_SUPPLY = 1_000_000_000 ether;

    event Metadata(string name, string symbol, string twitter, string website, string logoURI);

    constructor(
        string memory name_,
        string memory symbol_
    )
        ERC20(name_, symbol_)
        Ownable(msg.sender)
    {
        _mint(msg.sender, MAX_SUPPLY);
        emit Metadata(name_, symbol_, TWITTER, WEBSITE, LOGO_URI);
    }

    // ─── ERC-7572 : contract-level metadata on-chain ──────────────────────
    // Image affichee UNIQUEMENT si LOGO_URI fourni (sinon champ vide)
    function contractURI() external view returns (string memory) {
        bytes memory json = abi.encodePacked(
            '{"name":"', name(),
            '","description":"', DESCRIPTION,
            '","image":"', LOGO_URI,
            '","external_link":"', WEBSITE,
            '","twitter":"', TWITTER,
            '"}'
        );
        return string(abi.encodePacked(
            "data:application/json;base64,",
            Base64.encode(json)
        ));
    }
}