// SPDX-License-Identifier: MIT

pragma solidity ^0.5.0;

import "@openzeppelin/upgrades/contracts/Initializable.sol";

import "./ERC1155Receiver.sol";

/**
 * @dev _Available since v3.1._
 */
contract ERC1155Holder is Initializable, ERC1155Receiver {
    function initialize() public initializer {
        ERC1155Receiver.initialize();
    }

    function onERC1155Received(address, address, uint256, uint256, bytes memory) public returns (bytes4) {
        return this.onERC1155Received.selector;
    }

    function onERC1155BatchReceived(address, address, uint256[] memory, uint256[] memory, bytes memory) public returns (bytes4) {
        return this.onERC1155BatchReceived.selector;
    }

    uint256[50] private ______gap;
}
