pragma solidity ^0.6.12;

/**
 * @title ISablier
 * @author Sablier
 */
interface ISablier {
    /**
     * @notice Emits when a stream is successfully created.
     */
    event CreateStream(
        uint256 indexed streamId,
        address indexed sender,
        address indexed recipient,
        uint256 deposit,
        address tokenAddress,
        uint256 startTime,
        uint256 stopTime
    );

    /**
     * @notice Emits when the recipient of a stream withdraws a portion or all their pro rata share of the stream.
     */
    event WithdrawFromStream(uint256 indexed streamId, address indexed recipient, uint256 amount);

    /**
     * @notice Emits when a stream is successfully cancelled and tokens are transferred back on a pro rata basis.
     */
    event CancelStream(
        uint256 indexed streamId,
        address indexed sender,
        address indexed recipient,
        uint256 senderBalance,
        uint256 recipientBalance
    );

    function balanceOf(uint256 streamId, address who) external view returns (uint256 balance);

    function getStream(uint256 streamId)
        external
        view
        returns (
            address sender,
            address recipient,
            uint256 deposit,
            address token,
            uint256 startTime,
            uint256 stopTime,
            uint256 remainingBalance,
            uint256 ratePerSecond
        );

    function createStream(address recipient, uint256 deposit, address tokenAddress, uint256 startTime, uint256 stopTime)
        external
        returns (uint256 streamId);

    function withdrawFromStream(uint256 streamId, uint256 funds) external returns (bool);

    function cancelStream(uint256 streamId) external returns (bool);
}