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/*
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*/

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

import "@openzeppelin/contracts-solc-8/proxy/Clones.sol";
import "@openzeppelin/contracts-solc-8/utils/Address.sol";
import "@openzeppelin/contracts-solc-8/utils/Strings.sol";

import "./interfaces/solc8/ICollectionContractInitializer.sol";
import "./interfaces/solc8/IRoles.sol";
import "./interfaces/solc8/ICollectionFactory.sol";
import "./interfaces/solc8/IProxyCall.sol";

/**
 * @title A factory to create NFT collections.
 * @notice Call this factory to create and initialize a minimal proxy pointing to the NFT collection contract.
 */
contract FNDCollectionFactory is ICollectionFactory {
  using Address for address;
  using Address for address payable;
  using Clones for address;
  using Strings for uint256;

  /**
   * @notice The contract address which manages common roles.
   * @dev Used by the collections for a shared operator definition.
   */
  IRoles public rolesContract;

  /**
   * @notice The address of the template all new collections will leverage.
   */
  address public implementation;

  /**
   * @notice The address of the proxy call contract implementation.
   * @dev Used by the collections to safely call another contract with arbitrary call data.
   */
  IProxyCall public proxyCallContract;

  /**
   * @notice The implementation version new collections will use.
   * @dev This is auto-incremented each time the implementation is changed.
   */
  uint256 public version;

  event RolesContractUpdated(address indexed rolesContract);
  event CollectionCreated(
    address indexed collectionContract,
    address indexed creator,
    uint256 indexed version,
    string name,
    string symbol,
    uint256 nonce
  );
  event ImplementationUpdated(address indexed implementation, uint256 indexed version);
  event ProxyCallContractUpdated(address indexed proxyCallContract);

  modifier onlyAdmin() {
    require(rolesContract.isAdmin(msg.sender), "FNDCollectionFactory: Caller does not have the Admin role");
    _;
  }

  constructor(address _proxyCallContract, address _rolesContract) {
    _updateRolesContract(_rolesContract);
    _updateProxyCallContract(_proxyCallContract);
  }

  /**
   * @notice Create a new collection contract.
   * @param nonce An arbitrary value used to allow a creator to mint multiple collections.
   * @dev The nonce is required and must be unique for the msg.sender + implementation version,
   * otherwise this call will revert.
   */
  function createCollection(
    string calldata name,
    string calldata symbol,
    uint256 nonce
  ) external returns (address) {
    require(bytes(symbol).length > 0, "FNDCollectionFactory: Symbol is required");

    // This reverts if the NFT was previously created using this implementation version + msg.sender + nonce
    address proxy = implementation.cloneDeterministic(_getSalt(msg.sender, nonce));

    ICollectionContractInitializer(proxy).initialize(payable(msg.sender), name, symbol);

    emit CollectionCreated(proxy, msg.sender, version, name, symbol, nonce);

    // Returning the address created allows other contracts to integrate with this call
    return address(proxy);
  }

  /**
   * @notice Allows Foundation to change the admin role contract address.
   */
  function adminUpdateRolesContract(address _rolesContract) external onlyAdmin {
    _updateRolesContract(_rolesContract);
  }

  /**
   * @notice Allows Foundation to change the collection implementation used for future collections.
   * This call will auto-increment the version.
   * Existing collections are not impacted.
   */
  function adminUpdateImplementation(address _implementation) external onlyAdmin {
    _updateImplementation(_implementation);
  }

  /**
   * @notice Allows Foundation to change the proxy call contract address.
   */
  function adminUpdateProxyCallContract(address _proxyCallContract) external onlyAdmin {
    _updateProxyCallContract(_proxyCallContract);
  }

  /**
   * @notice Returns the address of a collection given the current implementation version, creator, and nonce.
   * This will return the same address whether the collection has already been created or not.
   * @param nonce An arbitrary value used to allow a creator to mint multiple collections.
   */
  function predictCollectionAddress(address creator, uint256 nonce) external view returns (address) {
    return implementation.predictDeterministicAddress(_getSalt(creator, nonce));
  }

  function _updateRolesContract(address _rolesContract) private {
    require(_rolesContract.isContract(), "FNDCollectionFactory: RolesContract is not a contract");
    rolesContract = IRoles(_rolesContract);

    emit RolesContractUpdated(_rolesContract);
  }

  /**
   * @dev Updates the implementation address, increments the version, and initializes the template.
   * Since the template is initialized when set, implementations cannot be re-used.
   * To downgrade the implementation, deploy the same bytecode again and then update to that.
   */
  function _updateImplementation(address _implementation) private {
    require(_implementation.isContract(), "FNDCollectionFactory: Implementation is not a contract");
    implementation = _implementation;
    version++;

    // The implementation is initialized when assigned so that others may not claim it as their own.
    ICollectionContractInitializer(_implementation).initialize(
      payable(address(rolesContract)),
      string(abi.encodePacked("Foundation Collection Template v", version.toString())),
      string(abi.encodePacked("FCTv", version.toString()))
    );

    emit ImplementationUpdated(_implementation, version);
  }

  function _updateProxyCallContract(address _proxyCallContract) private {
    require(_proxyCallContract.isContract(), "FNDCollectionFactory: Proxy call address is not a contract");
    proxyCallContract = IProxyCall(_proxyCallContract);

    emit ProxyCallContractUpdated(_proxyCallContract);
  }

  function _getSalt(address creator, uint256 nonce) private pure returns (bytes32) {
    return keccak256(abi.encodePacked(creator, nonce));
  }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev https://eips.ethereum.org/EIPS/eip-1167[EIP 1167] is a standard for
 * deploying minimal proxy contracts, also known as "clones".
 *
 * > To simply and cheaply clone contract functionality in an immutable way, this standard specifies
 * > a minimal bytecode implementation that delegates all calls to a known, fixed address.
 *
 * The library includes functions to deploy a proxy using either `create` (traditional deployment) or `create2`
 * (salted deterministic deployment). It also includes functions to predict the addresses of clones deployed using the
 * deterministic method.
 *
 * _Available since v3.4._
 */
library Clones {
    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create opcode, which should never revert.
     */
    function clone(address implementation) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create(0, ptr, 0x37)
        }
        require(instance != address(0), "ERC1167: create failed");
    }

    /**
     * @dev Deploys and returns the address of a clone that mimics the behaviour of `implementation`.
     *
     * This function uses the create2 opcode and a `salt` to deterministically deploy
     * the clone. Using the same `implementation` and `salt` multiple time will revert, since
     * the clones cannot be deployed twice at the same address.
     */
    function cloneDeterministic(address implementation, bytes32 salt) internal returns (address instance) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000)
            instance := create2(0, ptr, 0x37, salt)
        }
        require(instance != address(0), "ERC1167: create2 failed");
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(
        address implementation,
        bytes32 salt,
        address deployer
    ) internal pure returns (address predicted) {
        assembly {
            let ptr := mload(0x40)
            mstore(ptr, 0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000)
            mstore(add(ptr, 0x14), shl(0x60, implementation))
            mstore(add(ptr, 0x28), 0x5af43d82803e903d91602b57fd5bf3ff00000000000000000000000000000000)
            mstore(add(ptr, 0x38), shl(0x60, deployer))
            mstore(add(ptr, 0x4c), salt)
            mstore(add(ptr, 0x6c), keccak256(ptr, 0x37))
            predicted := keccak256(add(ptr, 0x37), 0x55)
        }
    }

    /**
     * @dev Computes the address of a clone deployed using {Clones-cloneDeterministic}.
     */
    function predictDeterministicAddress(address implementation, bytes32 salt)
        internal
        view
        returns (address predicted)
    {
        return predictDeterministicAddress(implementation, salt, address(this));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

interface ICollectionContractInitializer {
  function initialize(
    address payable _creator,
    string memory _name,
    string memory _symbol
  ) external;
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

/**
 * @notice Interface for a contract which implements admin roles.
 */
interface IRoles {
  function isAdmin(address account) external view returns (bool);

  function isOperator(address account) external view returns (bool);
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

import "./IRoles.sol";
import "./IProxyCall.sol";

interface ICollectionFactory {
  function rolesContract() external returns (IRoles);

  function proxyCallContract() external returns (IProxyCall);
}

// SPDX-License-Identifier: MIT OR Apache-2.0

pragma solidity ^0.8.0;

interface IProxyCall {
  function proxyCallAndReturnAddress(address externalContract, bytes calldata callData)
    external
    returns (address payable result);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1337
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"address","name":"_proxyCallContract","type":"address"},{"internalType":"address","name":"_rolesContract","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"collectionContract","type":"address"},{"indexed":true,"internalType":"address","name":"creator","type":"address"},{"indexed":true,"internalType":"uint256","name":"version","type":"uint256"},{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":false,"internalType":"string","name":"symbol","type":"string"},{"indexed":false,"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"CollectionCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"},{"indexed":true,"internalType":"uint256","name":"version","type":"uint256"}],"name":"ImplementationUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"proxyCallContract","type":"address"}],"name":"ProxyCallContractUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rolesContract","type":"address"}],"name":"RolesContractUpdated","type":"event"},{"inputs":[{"internalType":"address","name":"_implementation","type":"address"}],"name":"adminUpdateImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_proxyCallContract","type":"address"}],"name":"adminUpdateProxyCallContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_rolesContract","type":"address"}],"name":"adminUpdateRolesContract","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"createCollection","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"creator","type":"address"},{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"predictCollectionAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"proxyCallContract","outputs":[{"internalType":"contract IProxyCall","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rolesContract","outputs":[{"internalType":"contract IRoles","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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000000000000000000000000461aa494426e04fb2449068bad5948a0d720aef200000000000000000000000067df244584b67e8c51b10ad610aaffa9a402fdb6

-----Decoded View---------------
Arg [0] : _proxyCallContract (address): 0x461AA494426e04fB2449068BaD5948a0d720aEf2
Arg [1] : _rolesContract (address): 0x67Df244584b67E8C51B10aD610aAfFa9a402FdB6

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000461aa494426e04fb2449068bad5948a0d720aef2
Arg [1] : 00000000000000000000000067df244584b67e8c51b10ad610aaffa9a402fdb6