pragma ever-solidity ^0.62.0;

pragma AbiHeader expire;
pragma AbiHeader pubkey;

import "./TokenRootBase.tsol";
import "../interfaces/IDisableableMintTokenRoot.tsol";
import "../libraries/TokenErrors.tsol";
import "../libraries/TokenMsgFlag.tsol";


/**
 * @dev Implementation of the {IBurnPausableTokenRoot} interface.
 *
 * This abstraction extends the functionality of {TokenRootBase} and increases
 * the capabilities of TokenRoot, adding the ability to permanently disable token minting.
 * And a view method that returns the state of `mintDisabled_`.
 */
abstract contract TokenRootDisableableMintBase is TokenRootBase, IDisableableMintTokenRoot {

    bool mintDisabled_;

    /**
     * @dev See {IDisableableMintTokenRoot-disableMint}.
     *
     * Post condition:
     *
     *  - `mintDisabled_` is set to `true`.
     */
    function disableMint() override external responsible onlyRootOwner returns (bool) {
        mintDisabled_ = true;
        return { value: 0, flag: TokenMsgFlag.REMAINING_GAS, bounce: false } mintDisabled_;
    }

    /**
     * @dev See {IDisableableMintTokenRoot-mintDisabled}.
     */
    function mintDisabled() override external view responsible returns (bool) {
        return { value: 0, flag: TokenMsgFlag.REMAINING_GAS, bounce: false } mintDisabled_;
    }

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

}