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

// Holders of "Art Block Curated" NFTs can claim free Mandelbrot VIP Passes (1 per piece owned)
// Each VIP Pass token allows to purchase a fractal from the Mandelbrot Set Collection during the pre-sale window.
// More info on the project: 
// https://mandelbrot.fractalnft.art

/// @author: FractalSoft
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   .........''''''''''',,,:oo:::;;coc;;;;;;::lxxx:                               .:loxc,,''
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   ....................................................'''''''''''''''''''.................
*/



/**
 * @title Mandelbrot VIP Dispenser
 */
contract IERC20 {
    function balanceOf(address account) public view virtual returns (uint256) {}
}

contract IVIP {
    function transfer(address _to, uint256 _value) public returns (bool) {}
}

contract VIP_Factory {     

    address constant ART_BLOCKS_ADDRESS = 0xa7d8d9ef8D8Ce8992Df33D8b8CF4Aebabd5bD270;
    address constant VIP_PASS_ADDRESS   = 0x5645E72bcBCb9f218268e5DB15F62F016f885984;
    mapping (address => uint256) claimed;
    string public name;
    string public symbol;
    

    constructor() { 
        name = "Mandelbrot VIP Dispenser";
        symbol = "MVD";
    }

    function claim(uint256 vips) public {
        uint256 art_blocks_holdings = IERC20(ART_BLOCKS_ADDRESS).balanceOf(msg.sender);
        require(art_blocks_holdings >= vips, "You don't hold enough Art Blocks!");
        require(claimed[msg.sender] + vips <= art_blocks_holdings, "You are claiming too many VIPS");
        claimed[msg.sender] = claimed[msg.sender] + vips;
        IVIP(VIP_PASS_ADDRESS).transfer(msg.sender, vips);
    }
}

{
  "remappings": [],
  "optimizer": {
    "enabled": true,
    "runs": 20
  },
  "evmVersion": "london",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  }
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"uint256","name":"vips","type":"uint256"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"}]

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