IXERC20minimal.sol

// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4 <0.9.0;

interface IXERC20minimal {
    /**
     * @notice Emits when a limit is set
     *
     * @param _mintingLimit The updated minting limit we are setting to the bridge
     * @param _burningLimit The updated burning limit we are setting to the bridge
     * @param _bridge The address of the bridge we are setting the limit too
     */
    event BridgeLimitsSet(uint256 _mintingLimit, uint256 _burningLimit, address indexed _bridge);

    /**
     * @notice Reverts when a user with too low of a limit tries to call mint/burn
     */
    error IXERC20_NotHighEnoughLimits();

    struct Bridge {
        BridgeParameters minterParams;
        BridgeParameters burnerParams;
    }

    struct BridgeParameters {
        uint256 timestamp;
        uint256 ratePerSecond;
        uint256 maxLimit;
        uint256 currentLimit;
    }

    /**
     * @notice Updates the limits of any bridge
     * @dev Can only be called by the owner
     * @param _mintingLimit The updated minting limit we are setting to the bridge
     * @param _burningLimit The updated burning limit we are setting to the bridge
     * @param _bridge The address of the bridge we are setting the limits too
     */
    function setBridgeLimits(address _bridge, uint256 _mintingLimit, uint256 _burningLimit) external;

    /**
     * @notice Returns the max limit of a minter
     *
     * @param _bridge The bridge we are viewing the limits of
     *  @return _limit The limit the bridge has
     */
    function mintingMaxLimitOf(address _bridge) external view returns (uint256 _limit);

    /**
     * @notice Returns the max limit of a bridge
     *
     * @param _bridge the bridge we are viewing the limits of
     * @return _limit The limit the bridge has
     */
    function burningMaxLimitOf(address _bridge) external view returns (uint256 _limit);

    /**
     * @notice Returns the current limit of a minter
     *
     * @param _bridge The bridge we are viewing the limits of
     * @return _limit The limit the minter has
     */
    function mintingCurrentLimitOf(address _bridge) external view returns (uint256 _limit);

    /**
     * @notice Returns the current limit of a bridge
     *
     * @param _bridge the bridge we are viewing the limits of
     * @return _limit The limit the bridge has
     */
    function burningCurrentLimitOf(address _bridge) external view returns (uint256 _limit);

    /**
     * @notice Mints tokens for a user
     * @dev Can only be called by a bridge
     * @param _user The address of the user who needs tokens minted
     * @param _amount The amount of tokens being minted
     */
    function mint(address _user, uint256 _amount) external;

    /**
     * @notice Burns tokens for a user
     * @dev Can only be called by a bridge
     * @param _user The address of the user who needs tokens burned
     * @param _amount The amount of tokens being burned
     */
    function burn(address _user, uint256 _amount) external;
}