Cryo Explorer Ethereum Mainnet

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "IERC20Lite.sol";

/**
 * @title    Deposit contract
 * @notice   Creates a contract with a known address and withdraws tokens from it.
 *           After deployment, the Vault will call fetch() to withdraw tokens.
 * @dev      Any change in this contract, including comments, will affect the final
 *           bytecode and therefore will affect the create2 derived addresses.
 *           Do NOT modify unless the consequences of doing so are fully understood.
 */
contract Deposit {
    address payable private immutable vault;

    /**
     * @notice  Upon deployment it fetches the tokens (native or ERC20) to the Vault.
     * @param token  The address of the token to fetch
     */
    constructor(address token) {
        vault = payable(msg.sender);
        // Slightly cheaper to use msg.sender instead of Vault.
        if (token == 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE) {
            // solhint-disable-next-line avoid-low-level-calls
            (bool success, ) = msg.sender.call{value: address(this).balance}("");
            require(success);
        } else {
            // IERC20Lite.transfer doesn't have a return bool to avoid reverts on non-standard ERC20s
            IERC20Lite(token).transfer(msg.sender, IERC20Lite(token).balanceOf(address(this)));
        }
    }

    /**
     * @notice  Allows the Vault to fetch ERC20 tokens from this contract.
     * @param token  The address of the token to fetch
     */
    function fetch(address token) external {
        require(msg.sender == vault);
        // IERC20Lite.transfer doesn't have a return bool to avoid reverts on non-standard ERC20s
        IERC20Lite(token).transfer(msg.sender, IERC20Lite(token).balanceOf(address(this)));
    }

    /// @notice Receives native tokens, emits an event and sends them to the Vault. Note that this
    // requires the sender to forward some more gas than for a simple transfer.
    receive() external payable {
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = vault.call{value: address(this).balance}("");
        require(success);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @title    ERC20 Lite Interface
 * @notice   The interface for functions ERC20Lite implements. This is intended to
 *           be used only in the Deposit contract.
 * @dev      Any change in this contract, including comments, will affect the final
 *           bytecode and therefore will affect the create2 derived addresses.
 *           Do NOT modify unless the consequences of doing so are fully understood.
 */
interface IERC20Lite {
    /// @dev Removed the return bool to avoid reverts on non-standard ERC20s.
    function transfer(address, uint256) external;

    function balanceOf(address) external view returns (uint256);
}