// File: Context.sol



// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.4.0/contracts/GSN/Context.sol

pragma solidity ^0.5.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
contract Context {
    // Empty internal constructor, to prevent people from mistakenly deploying
    // an instance of this contract, which should be used via inheritance.
    constructor () internal { }
    // solhint-disable-previous-line no-empty-blocks

    function _msgSender() internal view returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: ERC20.sol



// File: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.4.0/contracts/token/ERC20/ERC20.sol
pragma solidity ^0.5.0;

import "./Context.sol";
import "./IERC20.sol";
import "./SafeMath.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20Mintable}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for `sender`'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: mint to the zero address");

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

     /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal {
        require(account != address(0), "ERC20: burn from the zero address");

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`.`amount` is then deducted
     * from the caller's allowance.
     *
     * See {_burn} and {_approve}.
     */
    function _burnFrom(address account, uint256 amount) internal {
        _burn(account, amount);
        _approve(account, _msgSender(), _allowances[account][_msgSender()].sub(amount, "ERC20: burn amount exceeds allowance"));
    }
}
// File: GenArt721Minter_DoodleLabs_Custom_Sale.sol



pragma solidity ^0.5.0;

import './GenArt721Minter_DoodleLabs_MultiMinter.sol';

interface IGenArt721Minter_DoodleLabs_Config {
    function getPurchaseManyLimit(uint256 projectId) external view returns (uint256 limit);
    function getState(uint256 projectId) external view returns (uint256 _state);
    function setStateFamilyCollectors(uint256 projectId) external;
    function setStateRedemption(uint256 projectId) external;
    function setStatePublic(uint256 projectId) external;
}

interface IGenArt721Minter_DoodleLabs_WhiteList {
    function getWhitelisted(uint256 projectId, address user) external view returns (uint256 amount);
    function addWhitelist(uint256 projectId, address[] calldata users, uint256[] calldata amounts) external;
    function decreaseAmount(uint256 projectId, address to) external;
}

contract GenArt721Minter_DoodleLabs_Custom_Sale is GenArt721Minter_DoodleLabs_MultiMinter {
    using SafeMath for uint256;

    event Redeem(uint256 projectId);

    // Must match what is on the GenArtMinterV2_State contract
    enum SaleState {
        FAMILY_COLLECTORS,
        REDEMPTION,
        PUBLIC
    }

    IGenArt721Minter_DoodleLabs_WhiteList public activeWhitelist;
    IGenArt721Minter_DoodleLabs_Config public minterState;

    modifier onlyWhitelisted() {
        require(genArtCoreContract.isWhitelisted(msg.sender), "can only be set by admin");
        _;
    }

    modifier notRedemptionState(uint256 projectId) {
        require(uint256(minterState.getState(projectId)) != uint256(SaleState.REDEMPTION), "can not purchase in redemption phase");
        _;
    }

    modifier onlyRedemptionState(uint256 projectId) {
        require(uint256(minterState.getState(projectId)) == uint256(SaleState.REDEMPTION), "not in redemption phase");
        _;
    }

    constructor(address _genArtCore, address _minterStateAddress) GenArt721Minter_DoodleLabs_MultiMinter(_genArtCore) public {
        minterState = IGenArt721Minter_DoodleLabs_Config(_minterStateAddress);
    }

    function setActiveWhitelist(address whitelist) public onlyWhitelisted {
        activeWhitelist = IGenArt721Minter_DoodleLabs_WhiteList(whitelist);
    }

    function purchaseMany(uint256 projectId, uint256 amount) public payable notRedemptionState(projectId) returns (uint256[] memory _tokenIds) {
        require(amount <= minterState.getPurchaseManyLimit(projectId), 'Max purchase many limit reached');
        return _purchaseMany(projectId, amount);
    }

    function purchase(uint256 _projectId) public payable notRedemptionState(_projectId) returns (uint256 _tokenId) {
        if (uint256(minterState.getState(_projectId)) == uint256(SaleState.FAMILY_COLLECTORS) && msg.value > 0) {
            require(false, 'ETH not accepted at this time');
        }
        return _purchase(_projectId);
    }

    function redeemMany(uint256 projectId, uint256 amount) public payable onlyRedemptionState(projectId) returns (uint256[] memory _tokenIds) {
        require(amount <= minterState.getPurchaseManyLimit(projectId), 'Max purchase many limit reached');
        uint256[] memory tokenIds = new uint256[](amount);
        bool isDeferredRefund = false;

        // Refund ETH if user accidentially overpays
        // This is not needed for ERC20 tokens
        if (msg.value > 0) {
            uint256 pricePerTokenInWei = genArtCoreContract.projectIdToPricePerTokenInWei(projectId);
            uint256 refund = msg.value.sub(pricePerTokenInWei.mul(amount));
            isDeferredRefund = true;

            if (refund > 0) {
                msg.sender.transfer(refund);
            }
        }

        for (uint256 i = 0; i < amount; i++) {
            tokenIds[i] = redeemTo(msg.sender, projectId, isDeferredRefund);
            emit Purchase(projectId);
        }

        return tokenIds;
    }

    function redeem(uint256 projectId) public payable onlyRedemptionState(projectId) returns (uint256 _tokenId) {
        return redeemTo(msg.sender, projectId, false);
    }

    function redeemTo(address to, uint256 projectId, bool isDeferredRefund) public payable onlyRedemptionState(projectId) returns (uint256 _tokenId) {
        activeWhitelist.decreaseAmount(projectId, to);
        emit Redeem(projectId);
        return purchaseTo(to, projectId, isDeferredRefund);
    }

}
// File: GenArt721Minter_DoodleLabs_MultiMinter.sol



pragma solidity ^0.5.0;

import './GenArtMinterV2_DoodleLabs.sol';
import './SafeMath.sol';

contract GenArt721Minter_DoodleLabs_MultiMinter is GenArt721Minter_DoodleLabs {
    using SafeMath for uint256;

    event PurchaseMany(uint256 projectId, uint256 amount);
    event Purchase(uint256 _projectId);

    constructor(address _genArtCore) GenArt721Minter_DoodleLabs(_genArtCore) internal {}

    function _purchaseMany(uint256 projectId, uint256 amount) internal returns (uint256[] memory _tokenIds) {
        uint256[] memory tokenIds = new uint256[](amount);
        bool isDeferredRefund = false;

        // Refund ETH if user accidentially overpays
        // This is not needed for ERC20 tokens
        if (msg.value > 0) {
            uint256 pricePerTokenInWei = genArtCoreContract.projectIdToPricePerTokenInWei(projectId);
            uint256 refund = msg.value.sub(pricePerTokenInWei.mul(amount));
            isDeferredRefund = true;

            if (refund > 0) {
                msg.sender.transfer(refund);
            }
        }

        for (uint256 i = 0; i < amount; i++) {
            tokenIds[i] = purchaseTo(msg.sender, projectId, isDeferredRefund);
            emit Purchase(projectId);
        }

        return tokenIds;
    }

    function _purchase(uint256 _projectId) internal returns (uint256 _tokenId) {
        emit Purchase(_projectId);
        return purchaseTo(msg.sender, _projectId, false);
    }
}
// File: GenArtMinterV2_DoodleLabs.sol



/**
 *Submitted for verification at Etherscan.io on 2021-10-21
*/

pragma solidity ^0.5.0;

import './SafeMath.sol';
import './Strings.sol';
import './ERC20.sol';
import './IGenArt721CoreV2.sol';

interface BonusContract {
  function triggerBonus(address _to) external returns (bool);
  function bonusIsActive() external view returns (bool);
}

contract GenArt721Minter_DoodleLabs {
  using SafeMath for uint256;

  IGenArt721CoreV2 public genArtCoreContract;

  uint256 constant ONE_MILLION = 1_000_000;

  address payable public ownerAddress;
  uint256 public ownerPercentage;

  mapping(uint256 => bool) public projectIdToBonus;
  mapping(uint256 => address) public projectIdToBonusContractAddress;
  mapping(uint256 => bool) public contractFilterProject;
  mapping(address => mapping (uint256 => uint256)) public projectMintCounter;
  mapping(uint256 => uint256) public projectMintLimit;
  mapping(uint256 => bool) public projectMaxHasBeenInvoked;
  mapping(uint256 => uint256) public projectMaxInvocations;

  constructor(address _genArt721Address) public {
    genArtCoreContract=IGenArt721CoreV2(_genArt721Address);
  }

  function getYourBalanceOfProjectERC20(uint256 _projectId) public view returns (uint256){
    uint256 balance = ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).balanceOf(msg.sender);
    return balance;
  }

  function checkYourAllowanceOfProjectERC20(uint256 _projectId) public view returns (uint256){
    uint256 remaining = ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).allowance(msg.sender, address(this));
    return remaining;
  }

  function setProjectMintLimit(uint256 _projectId,uint8 _limit) public {
    require(genArtCoreContract.isWhitelisted(msg.sender), "can only be set by admin");
    projectMintLimit[_projectId] = _limit;
  }

  function setProjectMaxInvocations(uint256 _projectId) public {
    require(genArtCoreContract.isWhitelisted(msg.sender), "can only be set by admin");
    uint256 maxInvocations;
    uint256 invocations;
    ( , , invocations, maxInvocations, , , , , ) = genArtCoreContract.projectTokenInfo(_projectId);
    projectMaxInvocations[_projectId] = maxInvocations;
    if (invocations < maxInvocations) {
        projectMaxHasBeenInvoked[_projectId] = false;
    }
  }

  function setOwnerAddress(address payable _ownerAddress) public {
    require(genArtCoreContract.isWhitelisted(msg.sender), "can only be set by admin");
    ownerAddress = _ownerAddress;
  }

  function setOwnerPercentage(uint256 _ownerPercentage) public {
    require(genArtCoreContract.isWhitelisted(msg.sender), "can only be set by admin");
    ownerPercentage = _ownerPercentage;
  }

  function toggleContractFilter(uint256 _projectId) public {
    require(genArtCoreContract.isWhitelisted(msg.sender), "can only be set by admin");
    contractFilterProject[_projectId]=!contractFilterProject[_projectId];
  }

  function artistToggleBonus(uint256 _projectId) public {
    require(msg.sender==genArtCoreContract.projectIdToArtistAddress(_projectId), "can only be set by artist");
    projectIdToBonus[_projectId]=!projectIdToBonus[_projectId];
  }

  function artistSetBonusContractAddress(uint256 _projectId, address _bonusContractAddress) public {
    require(msg.sender==genArtCoreContract.projectIdToArtistAddress(_projectId), "can only be set by artist");
    projectIdToBonusContractAddress[_projectId]=_bonusContractAddress;
  }

  function purchase(uint256 _projectId) public payable returns (uint256 _tokenId) {
    return purchaseTo(msg.sender, _projectId, false);
  }

  // Remove `public`` and `payable`` to prevent public use
  // of the `purchaseTo`` function.
  function purchaseTo(address _to, uint256 _projectId, bool _isDeferredRefund) internal returns(uint256 _tokenId){
    require(!projectMaxHasBeenInvoked[_projectId], "Maximum number of invocations reached");
    if (keccak256(abi.encodePacked(genArtCoreContract.projectIdToCurrencySymbol(_projectId))) != keccak256(abi.encodePacked("ETH"))){
      require(msg.value==0, "this project accepts a different currency and cannot accept ETH");
      require(ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).allowance(msg.sender, address(this)) >= genArtCoreContract.projectIdToPricePerTokenInWei(_projectId), "Insufficient Funds Approved for TX");
      require(ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).balanceOf(msg.sender) >= genArtCoreContract.projectIdToPricePerTokenInWei(_projectId), "Insufficient balance.");
      _splitFundsERC20(_projectId);
    } else {
      require(msg.value>=genArtCoreContract.projectIdToPricePerTokenInWei(_projectId), "Must send minimum value to mint!");
      _splitFundsETH(_projectId, _isDeferredRefund);
    }

    // if contract filter is active prevent calls from another contract
    if (contractFilterProject[_projectId]) require(msg.sender == tx.origin, "No Contract Buys");

    // limit mints per address by project
    if (projectMintLimit[_projectId] > 0) {
        require(projectMintCounter[msg.sender][_projectId] < projectMintLimit[_projectId], "Reached minting limit");
        projectMintCounter[msg.sender][_projectId]++;
    }

    uint256 tokenId = genArtCoreContract.mint(_to, _projectId, msg.sender);

    // What if this overflows, since default value of uint256 is 0?
    // That is intended, so that by default the minter allows infinite
    // transactions, allowing the `genArtCoreContract` to stop minting
    // `uint256 tokenInvocation = tokenId % ONE_MILLION;`
    if (tokenId % ONE_MILLION == projectMaxInvocations[_projectId]-1){
        projectMaxHasBeenInvoked[_projectId] = true;
    }

    if (projectIdToBonus[_projectId]){
      require(BonusContract(projectIdToBonusContractAddress[_projectId]).bonusIsActive(), "bonus must be active");
      BonusContract(projectIdToBonusContractAddress[_projectId]).triggerBonus(msg.sender);
    }

    return tokenId;
  }

  function _splitFundsETH(uint256 _projectId, bool _isDeferredRefund) internal {
    if (msg.value > 0) {
      uint256 pricePerTokenInWei = genArtCoreContract.projectIdToPricePerTokenInWei(_projectId);
      uint256 refund = msg.value.sub(genArtCoreContract.projectIdToPricePerTokenInWei(_projectId));
      if (!_isDeferredRefund && refund > 0) {
        msg.sender.transfer(refund);
      }
      uint256 renderProviderAmount = pricePerTokenInWei.div(100).mul(genArtCoreContract.renderProviderPercentage());
      if (renderProviderAmount > 0) {
        genArtCoreContract.renderProviderAddress().transfer(renderProviderAmount);
      }

      uint256 remainingFunds = pricePerTokenInWei.sub(renderProviderAmount);

      uint256 ownerFunds = remainingFunds.div(100).mul(ownerPercentage);
      if (ownerFunds > 0) {
        ownerAddress.transfer(ownerFunds);
      }

      uint256 projectFunds = pricePerTokenInWei.sub(renderProviderAmount).sub(ownerFunds);
      uint256 additionalPayeeAmount;
      if (genArtCoreContract.projectIdToAdditionalPayeePercentage(_projectId) > 0) {
        additionalPayeeAmount = projectFunds.div(100).mul(genArtCoreContract.projectIdToAdditionalPayeePercentage(_projectId));
        if (additionalPayeeAmount > 0) {
          genArtCoreContract.projectIdToAdditionalPayee(_projectId).transfer(additionalPayeeAmount);
        }
      }
      uint256 creatorFunds = projectFunds.sub(additionalPayeeAmount);
      if (creatorFunds > 0) {
        genArtCoreContract.projectIdToArtistAddress(_projectId).transfer(creatorFunds);
      }
    }
  }

  function _splitFundsERC20(uint256 _projectId) internal {
      uint256 pricePerTokenInWei = genArtCoreContract.projectIdToPricePerTokenInWei(_projectId);
      uint256 renderProviderAmount = pricePerTokenInWei.div(100).mul(genArtCoreContract.renderProviderPercentage());
      if (renderProviderAmount > 0) {
        ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).transferFrom(msg.sender, genArtCoreContract.renderProviderAddress(), renderProviderAmount);
      }
      uint256 remainingFunds = pricePerTokenInWei.sub(renderProviderAmount);

      uint256 ownerFunds = remainingFunds.div(100).mul(ownerPercentage);
      if (ownerFunds > 0) {
        ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).transferFrom(msg.sender, ownerAddress, ownerFunds);
      }

      uint256 projectFunds = pricePerTokenInWei.sub(renderProviderAmount).sub(ownerFunds);
      uint256 additionalPayeeAmount;
      if (genArtCoreContract.projectIdToAdditionalPayeePercentage(_projectId) > 0) {
        additionalPayeeAmount = projectFunds.div(100).mul(genArtCoreContract.projectIdToAdditionalPayeePercentage(_projectId));
        if (additionalPayeeAmount > 0) {
          ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).transferFrom(msg.sender, genArtCoreContract.projectIdToAdditionalPayee(_projectId), additionalPayeeAmount);
        }
      }
      uint256 creatorFunds = projectFunds.sub(additionalPayeeAmount);
      if (creatorFunds > 0) {
        ERC20(genArtCoreContract.projectIdToCurrencyAddress(_projectId)).transferFrom(msg.sender, genArtCoreContract.projectIdToArtistAddress(_projectId), creatorFunds);
      }
    }
}
// File: IERC20.sol



// File: @openzeppelin/contracts/token/ERC20/IERC20.sol
pragma solidity ^0.5.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP. Does not include
 * the optional functions; to access them see {ERC20Detailed}.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}
// File: IGenArt721CoreV2.sol



pragma solidity ^0.5.0;

interface IGenArt721CoreV2 {
  function isWhitelisted(address sender) external view returns (bool);
  function projectIdToCurrencySymbol(uint256 _projectId) external view returns (string memory);
  function projectIdToCurrencyAddress(uint256 _projectId) external view returns (address);
  function projectIdToArtistAddress(uint256 _projectId) external view returns (address payable);
  function projectIdToPricePerTokenInWei(uint256 _projectId) external view returns (uint256);
  function projectIdToAdditionalPayee(uint256 _projectId) external view returns (address payable);
  function projectIdToAdditionalPayeePercentage(uint256 _projectId) external view returns (uint256);
  function projectTokenInfo(uint256 _projectId) external view returns (address, uint256, uint256, uint256, bool, address, uint256, string memory, address);
  function renderProviderAddress() external view returns (address payable);
  function renderProviderPercentage() external view returns (uint256);
  function mint(address _to, uint256 _projectId, address _by) external returns (uint256 tokenId);
}
// File: SafeMath.sol



// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.4.0/contracts/math/SafeMath.sol
pragma solidity ^0.5.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     *
     * _Available since v2.4.0._
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}
// File: Strings.sol



// File: contracts/Strings.sol

pragma solidity ^0.5.0;

//https://github.com/oraclize/ethereum-api/blob/master/oraclizeAPI_0.5.sol
library Strings {

    function strConcat(string memory _a, string memory _b) internal pure returns (string memory _concatenatedString) {
        return strConcat(_a, _b, "", "", "");
    }

    function strConcat(string memory _a, string memory _b, string memory _c) internal pure returns (string memory _concatenatedString) {
        return strConcat(_a, _b, _c, "", "");
    }

    function strConcat(string memory _a, string memory _b, string memory _c, string memory _d) internal pure returns (string memory _concatenatedString) {
        return strConcat(_a, _b, _c, _d, "");
    }

    function strConcat(string memory _a, string memory _b, string memory _c, string memory _d, string memory _e) internal pure returns (string memory _concatenatedString) {
        bytes memory _ba = bytes(_a);
        bytes memory _bb = bytes(_b);
        bytes memory _bc = bytes(_c);
        bytes memory _bd = bytes(_d);
        bytes memory _be = bytes(_e);
        string memory abcde = new string(_ba.length + _bb.length + _bc.length + _bd.length + _be.length);
        bytes memory babcde = bytes(abcde);
        uint k = 0;
        uint i = 0;
        for (i = 0; i < _ba.length; i++) {
            babcde[k++] = _ba[i];
        }
        for (i = 0; i < _bb.length; i++) {
            babcde[k++] = _bb[i];
        }
        for (i = 0; i < _bc.length; i++) {
            babcde[k++] = _bc[i];
        }
        for (i = 0; i < _bd.length; i++) {
            babcde[k++] = _bd[i];
        }
        for (i = 0; i < _be.length; i++) {
            babcde[k++] = _be[i];
        }
        return string(babcde);
    }

    function uint2str(uint _i) internal pure returns (string memory _uintAsString) {
        if (_i == 0) {
            return "0";
        }
        uint j = _i;
        uint len;
        while (j != 0) {
            len++;
            j /= 10;
        }
        bytes memory bstr = new bytes(len);
        uint k = len - 1;
        while (_i != 0) {
            bstr[k--] = byte(uint8(48 + _i % 10));
            _i /= 10;
        }
        return string(bstr);
    }
}