Contract Source Code (Solidity)

IDE

• Blockscan IDE
• 🤖 Code ReaderBeta
• Remix IDE

Outline

   - function _msgSender()    - function _msgData() interface IERC20    - function totalSupply()    - function balanceOf(address account)    - function transfer(address recipient, ...    - function allowance(address owner, add ...    - function approve(address spender, uin ...    - function transferFrom(address sender, ... library SafeMath    - function add(uint256 a, uint256 b)    - function sub(uint256 a, uint256 b)    - function sub(uint256 a, uint256 b, st ...    - function mul(uint256 a, uint256 b)    - function div(uint256 a, uint256 b)    - function div(uint256 a, uint256 b, st ...    - function mod(uint256 a, uint256 b)    - function mod(uint256 a, uint256 b, st ... library Address    - function isContract(address account)    - function sendValue(address payable re ...    - function functionCall(address target, ...    - function functionCall(address target, ...    - function functionCallWithValue(addres ...    - function functionCallWithValue(addres ...    - function _functionCallWithValue(addre ...  contract ERC20 is Context, IERC20    - function name()    - function symbol()    - function decimals()    - function totalSupply()    - function balanceOf(address account)    - function transfer(address recipient, ...    - function allowance(address owner, add ...    - function approve(address spender, uin ...    - function transferFrom(address sender, ...    - function increaseAllowance(address sp ...    - function decreaseAllowance(address sp ...    - function _transfer(address sender, ad ...    - function _mint(address account, uint2 ...    - function _burn(address account, uint2 ...    - function _approve(address owner, addr ...    - function _setupDecimals(uint8 decimal ...    - function _beforeTokenTransfer(address ...    - function burn(uint256 amount)    - function burnFrom(address account, ui ...  contract Ownable is Context    - function owner()    - function renounceOwnership()    - function transferOwnership(address ne ...  contract TokenUpgrader is Ownable    - function burn(uint256 _amount)    - function withdraw(uint256 _amount)  contract SpaceChain is ERC20Burnab ... *    - function migrateV1tokens()    - function createUpgrader()

More Options

• Similar
• Sol2Uml
• Submit Audit
• Compare

/**
 *Submitted for verification at Etherscan.io on 2020-09-19
*/

// File: @openzeppelin/contracts/GSN/Context.sol
// SPDX-License-Identifier: MIT


pragma solidity ^0.6.0;

/*
 * @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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol



pragma solidity ^0.6.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

// File: @openzeppelin/contracts/math/SafeMath.sol



pragma solidity ^0.6.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin/contracts/utils/Address.sol



pragma solidity ^0.6.2;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // According to EIP-1052, 0x0 is the value returned for not-yet created accounts
        // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
        // for accounts without code, i.e. `keccak256('')`
        bytes32 codehash;
        bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
        // solhint-disable-next-line no-inline-assembly
        assembly { codehash := extcodehash(account) }
        return (codehash != accountHash && codehash != 0x0);
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/token/ERC20/ERC20.sol



pragma solidity ^0.6.0;





/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name, string memory symbol) public {
        _name = name;
        _symbol = symbol;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

// File: @openzeppelin/contracts/token/ERC20/ERC20Burnable.sol



pragma solidity ^0.6.0;



/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");

        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



pragma solidity ^0.6.0;

/**
 * @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.
 */
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 () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        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 {
        emit OwnershipTransferred(_owner, address(0));
        _owner = 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");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: contracts/TokenUpgrader.sol

pragma solidity ^0.6.6;

contract TokenUpgrader is Ownable {
    ERC20Burnable public token = ERC20Burnable(0x8069080a922834460C3A092FB2c1510224dc066b);
    address public tokenHolder;

    constructor(address _tokenHolder) public {
        tokenHolder = _tokenHolder;
    }

    function burn(uint256 _amount) public onlyOwner {
        // burn token from contract's balance
        token.burn(_amount);
    }

    function withdraw(uint256 _amount) public {
        require(_msgSender() == tokenHolder);
        token.transfer(_msgSender(), _amount);
    }
}

// File: contracts/SpaceChain.sol




pragma solidity ^0.6.6;

contract SpaceChain is ERC20Burnable {
    mapping(address => TokenUpgrader) public tokenUpgrader;

    constructor() public ERC20("SpaceChainV2", "SPC") {}

    function migrateV1tokens() public {
        require(
            address(tokenUpgrader[_msgSender()]) != address(0x0),
            "Upgrader contract not created"
        );
        TokenUpgrader upgrader = tokenUpgrader[_msgSender()];
        IERC20 tokenv1 = IERC20(0x8069080a922834460C3A092FB2c1510224dc066b);
        uint256 amount = tokenv1.balanceOf(address(upgrader));
        upgrader.burn(amount);
        _mint(_msgSender(), amount);
    }

    function createUpgrader() public {
        require(
            address(tokenUpgrader[_msgSender()]) == address(0x0),
            "Already created upgrader contract"
        );
        tokenUpgrader[_msgSender()] = new TokenUpgrader(_msgSender());
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"burnFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"createUpgrader","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"subtractedValue","type":"uint256"}],"name":"decreaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"addedValue","type":"uint256"}],"name":"increaseAllowance","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"migrateV1tokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"tokenUpgrader","outputs":[{"internalType":"contract TokenUpgrader","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"}]

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

30625:896:0:-:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;17633:83;;;:::i;:::-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;19739:169;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;19739:169:0;;;;;;;;:::i;:::-;;;;;;;;;;;;;;;;;;18708:100;;;:::i;:::-;;;;;;;;;;;;;;;;20382:321;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;20382:321:0;;;;;;;;;;;;;;;;;:::i;18560:83::-;;;:::i;:::-;;;;;;;;;;;;;;;;;;;21112:218;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;21112:218:0;;;;;;;;:::i;30792:459::-;;;:::i;:::-;;26930:91;;;;;;;;;;;;;;;;-1:-1:-1;26930:91:0;;:::i;31259:259::-;;;:::i;18871:119::-;;;;;;;;;;;;;;;;-1:-1:-1;18871:119:0;-1:-1:-1;;;;;18871:119:0;;:::i;27340:295::-;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;27340:295:0;;;;;;;;:::i;17835:87::-;;;:::i;21833:269::-;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;21833:269:0;;;;;;;;:::i;19203:175::-;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;19203:175:0;;;;;;;;:::i;30669:54::-;;;;;;;;;;;;;;;;-1:-1:-1;30669:54:0;-1:-1:-1;;;;;30669:54:0;;:::i;:::-;;;;-1:-1:-1;;;;;30669:54:0;;;;;;;;;;;;;;19441:151;;;;;;;;;;;;;;;;-1:-1:-1;;;;;;19441:151:0;;;;;;;;;;:::i;17633:83::-;17703:5;17696:12;;;;;;;;-1:-1:-1;;17696:12:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;17670:13;;17696:12;;17703:5;;17696:12;;17703:5;17696:12;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;17633:83;:::o;19739:169::-;19822:4;19839:39;19848:12;:10;:12::i;:::-;19862:7;19871:6;19839:8;:39::i;:::-;-1:-1:-1;19896:4:0;19739:169;;;;:::o;18708:100::-;18788:12;;18708:100;:::o;20382:321::-;20488:4;20505:36;20515:6;20523:9;20534:6;20505:9;:36::i;:::-;20552:121;20561:6;20569:12;:10;:12::i;:::-;20583:89;20621:6;20583:89;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;20583:19:0;;;;;;:11;:19;;;;;;20603:12;:10;:12::i;:::-;-1:-1:-1;;;;;20583:33:0;;;;;;;;;;;;-1:-1:-1;20583:33:0;;;:89;:37;:89::i;:::-;20552:8;:121::i;:::-;-1:-1:-1;20691:4:0;20382:321;;;;;:::o;18560:83::-;18626:9;;;;18560:83;:::o;21112:218::-;21200:4;21217:83;21226:12;:10;:12::i;:::-;21240:7;21249:50;21288:10;21249:11;:25;21261:12;:10;:12::i;:::-;-1:-1:-1;;;;;21249:25:0;;;;;;;;;;;;;;;;;-1:-1:-1;21249:25:0;;;:34;;;;;;;;;;;:38;:50::i;30792:459::-;30907:3;30867:13;30907:3;30881:12;:10;:12::i;:::-;-1:-1:-1;;;;;30867:27:0;;;;;;;;;;;;;;-1:-1:-1;30867:27:0;;;30859:52;;30837:131;;;;;-1:-1:-1;;;30837:131:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;30979:22;31004:13;:27;31018:12;:10;:12::i;:::-;-1:-1:-1;;;;;31004:27:0;;;;;;;;;;;;;;;;;-1:-1:-1;31004:27:0;;;;31137:36;;-1:-1:-1;;;31137:36:0;;31004:27;;31137:36;;;;;;;;31004:27;;-1:-1:-1;31066:42:0;;-1:-1:-1;;31066:42:0;;31137:17;;:36;;;;;31004:27;;31137:36;;;;;31066:42;31137:36;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;31137:36:0;31184:21;;;-1:-1:-1;;;31184:21:0;;;;;;;;;;31137:36;;-1:-1:-1;;;;;;31184:13:0;;;;;:21;;;;;-1:-1:-1;;31184:21:0;;;;;;;;-1:-1:-1;31184:13:0;:21;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;31216:27;31222:12;:10;:12::i;:::-;31236:6;31216:5;:27::i;:::-;30792:459;;;:::o;26930:91::-;26986:27;26992:12;:10;:12::i;:::-;27006:6;26986:5;:27::i;:::-;26930:91;:::o;31259:259::-;31373:3;31333:13;31373:3;31347:12;:10;:12::i;:::-;-1:-1:-1;;;;;31333:27:0;;;;;;;;;;;;;;-1:-1:-1;31333:27:0;;;31325:52;31303:135;;;;-1:-1:-1;;;31303:135:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;31497:12;:10;:12::i;:::-;31479:31;;;;;:::i;:::-;-1:-1:-1;;;;;31479:31:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;31449:13;:27;31463:12;:10;:12::i;:::-;-1:-1:-1;;;;;31449:27:0;;;;;;;;;;;;;;-1:-1:-1;31449:27:0;:61;;-1:-1:-1;;;;;;31449:61:0;;;;;;;;;;;31259:259::o;18871:119::-;-1:-1:-1;;;;;18964:18:0;18937:7;18964:18;;;;;;;;;;;;18871:119::o;27340:295::-;27417:26;27446:84;27483:6;27446:84;;;;;;;;;;;;;;;;;:32;27456:7;27465:12;:10;:12::i;:::-;27446:9;:32::i;:::-;:36;:84;:36;:84::i;:::-;27417:113;;27543:51;27552:7;27561:12;:10;:12::i;:::-;27575:18;27543:8;:51::i;:::-;27605:22;27611:7;27620:6;27605:5;:22::i;17835:87::-;17907:7;17900:14;;;;;;;;-1:-1:-1;;17900:14:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;17874:13;;17900:14;;17907:7;;17900:14;;17907:7;17900:14;;;;;;;;;;;;;;;;;;;;;;;;21833:269;21926:4;21943:129;21952:12;:10;:12::i;:::-;21966:7;21975:96;22014:15;21975:96;;;;;;;;;;;;;;;;;:11;:25;21987:12;:10;:12::i;:::-;-1:-1:-1;;;;;21975:25:0;;;;;;;;;;;;;;;;;-1:-1:-1;21975:25:0;;;:34;;;;;;;;;;;:96;:38;:96::i;19203:175::-;19289:4;19306:42;19316:12;:10;:12::i;:::-;19330:9;19341:6;19306:9;:42::i;30669:54::-;;;;;;;;;;;;-1:-1:-1;;;;;30669:54:0;;:::o;19441:151::-;-1:-1:-1;;;;;19557:18:0;;;19530:7;19557:18;;;:11;:18;;;;;;;;:27;;;;;;;;;;;;;19441:151::o;657:106::-;745:10;657:106;:::o;24980:346::-;-1:-1:-1;;;;;25082:19:0;;25074:68;;;;-1:-1:-1;;;25074:68:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;25161:21:0;;25153:68;;;;-1:-1:-1;;;25153:68:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;25234:18:0;;;;;;;:11;:18;;;;;;;;:27;;;;;;;;;;;;;:36;;;25286:32;;;;;;;;;;;;;;;;;24980:346;;;:::o;22592:539::-;-1:-1:-1;;;;;22698:20:0;;22690:70;;;;-1:-1:-1;;;22690:70:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;22779:23:0;;22771:71;;;;-1:-1:-1;;;22771:71:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;22855:47;22876:6;22884:9;22895:6;22855:20;:47::i;:::-;22935:71;22957:6;22935:71;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;22935:17:0;;:9;:17;;;;;;;;;;;;:71;:21;:71::i;:::-;-1:-1:-1;;;;;22915:17:0;;;:9;:17;;;;;;;;;;;:91;;;;23040:20;;;;;;;:32;;23065:6;23040:24;:32::i;:::-;-1:-1:-1;;;;;23017:20:0;;;:9;:20;;;;;;;;;;;;:55;;;;23088:35;;;;;;;23017:20;;23088:35;;;;;;;;;;;;;22592:539;;;:::o;5642:192::-;5728:7;5764:12;5756:6;;;;5748:29;;;;-1:-1:-1;;;5748:29:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-1:-1:-1;;;5800:5:0;;;5642:192::o;4739:181::-;4797:7;4829:5;;;4853:6;;;;4845:46;;;;;-1:-1:-1;;;4845:46:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;4911:1;4739:181;-1:-1:-1;;;4739:181:0:o;23412:378::-;-1:-1:-1;;;;;23496:21:0;;23488:65;;;;;-1:-1:-1;;;23488:65:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;23566:49;23595:1;23599:7;23608:6;23566:20;:49::i;:::-;23643:12;;:24;;23660:6;23643:16;:24::i;:::-;23628:12;:39;-1:-1:-1;;;;;23699:18:0;;:9;:18;;;;;;;;;;;:30;;23722:6;23699:22;:30::i;:::-;-1:-1:-1;;;;;23678:18:0;;:9;:18;;;;;;;;;;;:51;;;;23745:37;;;;;;;23678:18;;:9;;23745:37;;;;;;;;;;23412:378;;:::o;24122:418::-;-1:-1:-1;;;;;24206:21:0;;24198:67;;;;-1:-1:-1;;;24198:67:0;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;24278:49;24299:7;24316:1;24320:6;24278:20;:49::i;:::-;24361:68;24384:6;24361:68;;;;;;;;;;;;;;;;;-1:-1:-1;;;;;24361:18:0;;:9;:18;;;;;;;;;;;;:68;:22;:68::i;:::-;-1:-1:-1;;;;;24340:18:0;;:9;:18;;;;;;;;;;:89;24455:12;;:24;;24472:6;24455:16;:24::i;:::-;24440:12;:39;24495:37;;;;;;;;24521:1;;-1:-1:-1;;;;;24495:37:0;;;;;;;;;;;;24122:418;;:::o;5203:136::-;5261:7;5288:43;5292:1;5295;5288:43;;;;;;;;;;;;;;;;;:3;:43::i;-1:-1:-1:-;;;;;;;;:::o

ipfs://ba00bf8333f9460de9340f2687c5e7bbd266f6f14a4d2ebb170c7a5a645ed0a9