pragma ever-solidity ^0.62.0;

pragma AbiHeader expire;
pragma AbiHeader pubkey;

import "./TokenRootBase.tsol";
import "../interfaces/IBurnPausableTokenRoot.tsol";
import "../libraries/TokenMsgFlag.tsol";

/**
 * @dev Implementation of the {IBurnPausableTokenRoot} interface.
 *
 * This abstraction extends the functionality of {TokenRootBase} and increases
 * the capabilities of TokenRoot, the ability to start and stop burning tokens.
 * And a view method that returns the state of `burnPaused_`.
 */
abstract contract TokenRootBurnPausableBase is TokenRootBase, IBurnPausableTokenRoot {

    bool burnPaused_;

    /**
     * @dev Returns the current state of the ability to burn tokens.
     * @return burning is paused `true` or not `false`.
     */
    function burnPaused() override external view responsible returns (bool) {
        return { value: 0, flag: TokenMsgFlag.REMAINING_GAS, bounce: false } burnPaused_;
    }

    /**
     * @dev See {IBurnPausableTokenRoot-setBurnPaused}.
     *
     * Post condition:
     *
     * - `burnPaused_` is set to the value of the `paused` parameter.
    */
    function setBurnPaused(bool paused) override external responsible onlyRootOwner returns (bool) {
        burnPaused_ = paused;
        return { value: 0, flag: TokenMsgFlag.REMAINING_GAS, bounce: false } burnPaused_;
    }

     /**
      * @dev See {TokenRootBase-_burnEnabled}.
      */
    function _burnEnabled() override internal view returns (bool) {
        return !burnPaused_;
    }

}