// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity 0.8.13;

interface ISky {
    function totalSupply() external view returns (uint);

    function balanceOf(address) external view returns (uint);

    function approve(address spender, uint value) external returns (bool);

    function transfer(address, uint) external returns (bool);

    function transferFrom(address, address, uint) external returns (bool);

    function mint(address, uint) external returns (bool);

    function minter() external returns (address);
}

// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

contract Skydrome is ISky, Ownable {
    string public constant name = "Skydrome";
    string public constant symbol = "SKY";
    uint8 public constant decimals = 18;
    uint public totalSupply = 0;

    mapping(address => uint) public balanceOf;
    mapping(address => mapping(address => uint)) public allowance;

    address public minter;

    event Transfer(address indexed from, address indexed to, uint value);
    event Approval(address indexed owner, address indexed spender, uint value);

    constructor(address initialSupplyRecipient, uint initialAmount) {
        minter = msg.sender;
        _mint(initialSupplyRecipient, initialAmount);
    }

    function setMinter(address _minter) external onlyOwner {
        minter = _minter;
    }

    function approve(address _spender, uint _value) external returns (bool) {
        allowance[msg.sender][_spender] = _value;
        emit Approval(msg.sender, _spender, _value);
        return true;
    }

    function _mint(address _to, uint _amount) internal returns (bool) {
        totalSupply += _amount;
        unchecked {
            balanceOf[_to] += _amount;
        }
        emit Transfer(address(0x0), _to, _amount);
        return true;
    }

    function _transfer(
        address _from,
        address _to,
        uint _value
    ) internal returns (bool) {
        balanceOf[_from] -= _value;
        unchecked {
            balanceOf[_to] += _value;
        }
        emit Transfer(_from, _to, _value);
        return true;
    }

    function transfer(address _to, uint _value) external returns (bool) {
        return _transfer(msg.sender, _to, _value);
    }

    function transferFrom(
        address _from,
        address _to,
        uint _value
    ) external returns (bool) {
        uint allowed_from = allowance[_from][msg.sender];
        if (allowed_from != type(uint).max) {
            allowance[_from][msg.sender] -= _value;
        }
        return _transfer(_from, _to, _value);
    }

    function mint(address account, uint amount) external returns (bool) {
        require(msg.sender == minter);
        _mint(account, amount);
        return true;
    }
}

{
  "compilationTarget": {
    "Skydrome.sol": "Skydrome"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}