DinosaurVault.sol

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

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

/**
 * @title Dinosaur Amber Vault
 * @notice Locks exactly 100 DINO to mint 1 dynamic Dinosaur NFT.
 * The NFT acts as a physical receipt for the 100-token lot.
 */
contract DinosaurVault is ERC721, ReentrancyGuard {
    IERC20 public immutable dinoToken;
    uint256 public constant TOKENS_PER_NFT = 100 * 10**18;
    
    uint256 private _nextId = 1;

    // Events
    event Incubated(address indexed user, uint256 indexed tokenId);
    event Shattered(address indexed user, uint256 indexed tokenId);

    constructor(address _dinoToken) ERC721("Dinosaur Vault", "DV-NFT") {
        dinoToken = IERC20(_dinoToken);
    }

    /**
     * @notice Locks 100 DINO and mints 1 NFT. 
     * @dev User must have called approve() on the DINO contract first.
     */
    function incubate() external nonReentrant {
        // Pull 100 DINO from the user and lock it in this contract
        require(dinoToken.transferFrom(msg.sender, address(this), TOKENS_PER_NFT), "Transfer failed");

        uint256 tokenId = _nextId++;
        _mint(msg.sender, tokenId);

        emit Incubated(msg.sender, tokenId);
    }

    /**
     * @notice Burns the NFT and returns the 100 DINO lot to the owner.
     */
    function shatter(uint256 tokenId) external nonReentrant {
        // Ensure only the owner can unlock the lot
        require(ownerOf(tokenId) == msg.sender, "Not the owner");

        _burn(tokenId);
        
        // Return the 100 DINO back to the user
        require(dinoToken.transfer(msg.sender, TOKENS_PER_NFT), "Transfer failed");

        emit Shattered(msg.sender, tokenId);
    }

    /**
     * @notice This function would interact with your Uniswap V4 Hook
     * to render the Upeg-style liquid metadata based on the current pool state.
     */
    function tokenURI(uint256 tokenId) public view override returns (string memory) {
        _requireOwned(tokenId);
        // Here you will route to the Upeg SVG rendering logic
        // which reads the Uniswap V4 Hook state.
        return "data:application/json;base64,..."; 
    }
}