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44/**
45 * @dev This contract will receive xQUICK tokens, the users will be able to swap their QUICK tokens for xQUICK tokens
46 *      as long as this contract holds enough amount. The swapped QUICK tokens will be burned(sent to DEAD address).
47 *      Once the withdrawTimeout is reached, the owner will be able to withdraw the remaining xQUICK tokens.
48 * @param _quick QUICK token address
49 * @param _quickX xQUICK token address
50 * @param duration Time in number of blocks after which the owner will be able to withdraw the xQUICK tokens
51 * @param _swapRatio swap ratio for QUICK to xQUICK
52 */
53constructor (
54    IERC20 _quick,
55    IERC20 _quickX,
56    uint256 duration,
57    uint256 _swapRatio
58){
59    require(_swapRatio == 100 || _swapRatio == 1000, "Invalid swap ratio");
60
61    quick = _quick;
62    quickX = _quickX;
63    withdrawTimeout = block.number + duration;
64    swapRatio = _swapRatio * 1000;
65
66}