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 */

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import { ERC20Tornado, IVerifier, IHasher, IERC20, SafeERC20 } from '../Classic/ERC20Tornado.sol';

/**
 * @dev Modified by tornadocontrib.eth to make it compatible with tornadoProxyLite contract
 */
contract ApprovalTornado is ERC20Tornado {
    using SafeERC20 for IERC20;

    address public immutable tornadoProxyLight;

    constructor(
        IVerifier _verifier,
        IHasher _hasher,
        uint256 _denomination,
        uint32 _merkleTreeHeight,
        IERC20 _token,
        address _tornadoProxyLight
    ) ERC20Tornado(_verifier, _hasher, _denomination, _merkleTreeHeight, _token) {
        token = _token;
        tornadoProxyLight = _tornadoProxyLight;
    }

    function _processDeposit() internal virtual override {
        require(msg.value == 0, "ETH value is supposed to be 0 for ERC20 instance");
        if (msg.sender == tornadoProxyLight) {
            token.safeTransferFrom(tx.origin, address(this), denomination);
            return;
        }
        super._processDeposit();
    }
}