// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "./ERC1155UpgradeSafe.sol";
import "../../utils/PausableUpgradeSafe.sol";
import "../../Initializable.sol";

/**
 * @dev ERC1155 token with pausable token transfers, minting and burning.
 *
 * Useful for scenarios such as preventing trades until the end of an evaluation
 * period, or having an emergency switch for freezing all token transfers in the
 * event of a large bug.
 *
 * _Available since v3.1._
 */
abstract contract ERC1155PausableUpgradeSafe is __Initializable, ERC1155UpgradeSafe, PausableUpgradeSafe {
    function __ERC1155Pausable_init() internal __initializer {
        __Context_init_unchained();
        __ERC165_init_unchained();
        __Pausable_init_unchained();
        __ERC1155Pausable_init_unchained();
    }

    function __ERC1155Pausable_init_unchained() internal __initializer {
    }
    /**
     * @dev See {ERC1155-_beforeTokenTransfer}.
     *
     * Requirements:
     *
     * - the contract must not be paused.
     */
    function _beforeTokenTransfer(
        address operator,
        address from,
        address to,
        uint256[] memory ids,
        uint256[] memory amounts,
        bytes memory data
    )
        internal virtual override
    {
        super._beforeTokenTransfer(operator, from, to, ids, amounts, data);

        require(!paused(), "ERC1155Pausable: token transfer while paused");
    }
}
