// SPDX-License-Identifier: CC0-1.0

pragma solidity 0.8.17;

interface IClaimTopicsRegistry {
    /**
     *  this event is emitted when a claim topic has been added to the ClaimTopicsRegistry
     *  the event is emitted by the 'addClaimTopic' function
     *  `claimTopic` is the required claim added to the Claim Topics Registry
     */
    event ClaimTopicAdded(uint256 indexed claimTopic);

    /**
     *  this event is emitted when a claim topic has been removed from the ClaimTopicsRegistry
     *  the event is emitted by the 'removeClaimTopic' function
     *  `claimTopic` is the required claim removed from the Claim Topics Registry
     */
    event ClaimTopicRemoved(uint256 indexed claimTopic);

    /**
     * @dev Add a trusted claim topic (For example: KYC=1, AML=2).
     * Only owner can call.
     * emits `ClaimTopicAdded` event
     * cannot add more than 15 topics for 1 token as adding more could create gas issues
     * @param _claimTopic The claim topic index
     */
    function addClaimTopic(uint256 _claimTopic) external;

    /**
     *  @dev Remove a trusted claim topic (For example: KYC=1, AML=2).
     *  Only owner can call.
     *  emits `ClaimTopicRemoved` event
     *  @param _claimTopic The claim topic index
     */
    function removeClaimTopic(uint256 _claimTopic) external;

    /**
     *  @dev Get the trusted claim topics for the security token
     *  @return Array of trusted claim topics
     */
    function getClaimTopics() external view returns (uint256[] memory);
}