IApproveAndCall.sol

pragma solidity ^0.5.17;

/**
 * @title Interface for contract governance/ApprovalReceiver.sol
 * @dev Interfaces are used to cast a contract address into a callable instance.
 */
interface IApproveAndCall {
    /**
     * @notice Receives approval from SOV token.
     * @param _sender The sender of SOV.approveAndCall function.
     * @param _amount The amount was approved.
     * @param _token The address of token.
     * @param _data The data will be used for low level call.
     * */
    function receiveApproval(
        address _sender,
        uint256 _amount,
        address _token,
        bytes calldata _data
    ) external;
}