// SPDX-License-Identifier: LGPL-3.0-only
pragma solidity ^0.8.0;

/// @title Enum - Collection of enums used in Safe contracts.
/// @author Richard Meissner - @rmeissner
abstract contract Enum {
    enum Operation {
        Call,
        DelegateCall
    }
}

/// @title IGnosisSafe - Gnosis Safe Interface
interface IGnosisSafe {
    function addOwnerWithThreshold(address owner, uint256 _threshold) external;
    function approveHash(bytes32 hashToApprove) external;
    function approvedHashes(address, bytes32) external view returns (uint256);
    function changeThreshold(uint256 _threshold) external;
    function checkNSignatures(bytes32 dataHash, bytes memory data, bytes memory signatures, uint256 requiredSignatures)
        external
        view;
    function checkSignatures(bytes32 dataHash, bytes memory data, bytes memory signatures) external view;
    function encodeTransactionData(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address refundReceiver,
        uint256 _nonce
    ) external view returns (bytes memory);
    function execTransaction(
        address to,
        uint256 value,
        bytes memory data,
        Enum.Operation operation,
        uint256 safeTxGas,
        uint256 baseGas,
        uint256 gasPrice,
        address gasToken,
        address refundReceiver,
        bytes memory signatures
    ) external payable returns (bool success);
    function getOwners() external view returns (address[] memory);
    function getThreshold() external view returns (uint256);
    function isOwner(address owner) external view returns (bool);
    function nonce() external view returns (uint256);
    function removeOwner(address prevOwner, address owner, uint256 _threshold) external;
    function setup(
        address[] memory _owners,
        uint256 _threshold,
        address to,
        bytes memory data,
        address fallbackHandler,
        address paymentToken,
        uint256 payment,
        address paymentReceiver
    ) external;
    function swapOwner(address prevOwner, address oldOwner, address newOwner) external;
}