# Contract Diff Checker

Contract Name:
LeveragedToken

Contract Source Code:

File 1 of 1 : LeveragedToken

```// File: openzeppelin-solidity/contracts/math/SafeMath.sol

pragma solidity ^0.5.0;

/**
* @title SafeMath
* @dev Unsigned math operations with safety checks that revert on error
*/
library SafeMath {
/**
* @dev Multiplies two unsigned integers, reverts on 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-solidity/pull/522
if (a == 0) {
return 0;
}

uint256 c = a * b;
require(c / a == b);

return c;
}

/**
* @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity only automatically asserts when dividing by 0
require(b > 0);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold

return c;
}

/**
* @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a);
uint256 c = a - b;

return c;
}

/**
* @dev Adds two unsigned integers, reverts on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a);

return c;
}

/**
* @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo),
* reverts when dividing by zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0);
return a % b;
}
}

// File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol

pragma solidity ^0.5.0;

/**
* @title ERC20 interface
* @dev see https://github.com/ethereum/EIPs/issues/20
*/
interface IERC20 {
function transfer(address to, uint256 value) external returns (bool);

function approve(address spender, uint256 value) external returns (bool);

function totalSupply() external view returns (uint256);

function balanceOf(address who) external view returns (uint256);

}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Detailed.sol

pragma solidity ^0.5.0;

/**
* @title ERC20Detailed token
* @dev The decimals are only for visualization purposes.
* All the operations are done using the smallest and indivisible token unit,
* just as on Ethereum all the operations are done in wei.
*/
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;

constructor (string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}

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

/**
* @return the symbol of the token.
*/
function symbol() public view returns (string memory) {
return _symbol;
}

/**
* @return the number of decimals of the token.
*/
function decimals() public view returns (uint8) {
return _decimals;
}
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20.sol

pragma solidity ^0.5.0;

/**
* @title Standard ERC20 token
*
* @dev Implementation of the basic standard token.
* https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
* Originally based on code by FirstBlood:
* https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
*
* This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for
* all accounts just by listening to said events. Note that this isn't required by the specification, and other
* compliant implementations may not do it.
*/
contract ERC20 is IERC20 {
using SafeMath for uint256;

mapping (address => uint256) private _balances;

uint256 private _totalSupply;

/**
* @dev Total number of tokens in existence
*/
function totalSupply() public view returns (uint256) {
return _totalSupply;
}

/**
* @dev Gets the balance of the specified address.
* @param owner The address to query the balance of.
* @return An uint256 representing the amount owned by the passed address.
*/
function balanceOf(address owner) public view returns (uint256) {
return _balances[owner];
}

/**
* @dev Function to check the amount of tokens that an owner allowed to a spender.
* @return A uint256 specifying the amount of tokens still available for the spender.
*/
return _allowed[owner][spender];
}

/**
* @dev Transfer token for a specified address
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/
function transfer(address to, uint256 value) public returns (bool) {
_transfer(msg.sender, to, value);
return true;
}

/**
* @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
* 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
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
*/
function approve(address spender, uint256 value) public returns (bool) {

_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}

/**
* @dev Transfer tokens from one address to another.
* Note that while this function emits an Approval event, this is not required as per the specification,
* and other compliant implementations may not emit the event.
* @param from address The address which you want to send tokens from
* @param to address The address which you want to transfer to
* @param value uint256 the amount of tokens to be transferred
*/
_allowed[from][msg.sender] = _allowed[from][msg.sender].sub(value);
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}

/**
* @dev Increase the amount of tokens that an owner allowed to a spender.
* approve should be called when allowed_[_spender] == 0. To increment
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param addedValue The amount of tokens to increase the allowance by.
*/

emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}

/**
* @dev Decrease the amount of tokens that an owner allowed to a spender.
* approve should be called when allowed_[_spender] == 0. To decrement
* allowed value is better to use this function to avoid 2 calls (and wait until
* the first transaction is mined)
* From MonolithDAO Token.sol
* Emits an Approval event.
* @param spender The address which will spend the funds.
* @param subtractedValue The amount of tokens to decrease the allowance by.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public returns (bool) {

_allowed[msg.sender][spender] = _allowed[msg.sender][spender].sub(subtractedValue);
emit Approval(msg.sender, spender, _allowed[msg.sender][spender]);
return true;
}

/**
* @dev Transfer token for a specified addresses
* @param from The address to transfer from.
* @param to The address to transfer to.
* @param value The amount to be transferred.
*/

_balances[from] = _balances[from].sub(value);
emit Transfer(from, to, value);
}

/**
* @dev Internal function that mints an amount of the token and assigns it to
* an account. This encapsulates the modification of balances such that the
* proper events are emitted.
* @param account The account that will receive the created tokens.
* @param value The amount that will be created.
*/
function _mint(address account, uint256 value) internal {

}

/**
* @dev Internal function that burns an amount of the token of a given
* account.
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burn(address account, uint256 value) internal {

_totalSupply = _totalSupply.sub(value);
_balances[account] = _balances[account].sub(value);
}

/**
* @dev Internal function that burns an amount of the token of a given
* account, deducting from the sender's allowance for said account. Uses the
* internal burn function.
* Emits an Approval event (reflecting the reduced allowance).
* @param account The account whose tokens will be burnt.
* @param value The amount that will be burnt.
*/
function _burnFrom(address account, uint256 value) internal {
_allowed[account][msg.sender] = _allowed[account][msg.sender].sub(value);
_burn(account, value);
emit Approval(account, msg.sender, _allowed[account][msg.sender]);
}
}

// File: openzeppelin-solidity/contracts/access/Roles.sol

pragma solidity ^0.5.0;

/**
* @title Roles
* @dev Library for managing addresses assigned to a Role.
*/
library Roles {
struct Role {
}

/**
*/
require(!has(role, account));

role.bearer[account] = true;
}

/**
*/
function remove(Role storage role, address account) internal {
require(has(role, account));

role.bearer[account] = false;
}

/**
* @dev check if an account has this role
* @return bool
*/
function has(Role storage role, address account) internal view returns (bool) {
return role.bearer[account];
}
}

// File: openzeppelin-solidity/contracts/access/roles/PauserRole.sol

pragma solidity ^0.5.0;

contract PauserRole {
using Roles for Roles.Role;

Roles.Role private _pausers;

constructor () internal {
}

modifier onlyPauser() {
require(isPauser(msg.sender));
_;
}

function isPauser(address account) public view returns (bool) {
return _pausers.has(account);
}

}

function renouncePauser() public {
_removePauser(msg.sender);
}

}

_pausers.remove(account);
emit PauserRemoved(account);
}
}

// File: openzeppelin-solidity/contracts/lifecycle/Pausable.sol

pragma solidity ^0.5.0;

/**
* @title Pausable
* @dev Base contract which allows children to implement an emergency stop mechanism.
*/
contract Pausable is PauserRole {

bool private _paused;

constructor () internal {
_paused = false;
}

/**
* @return true if the contract is paused, false otherwise.
*/
function paused() public view returns (bool) {
return _paused;
}

/**
* @dev Modifier to make a function callable only when the contract is not paused.
*/
modifier whenNotPaused() {
require(!_paused);
_;
}

/**
* @dev Modifier to make a function callable only when the contract is paused.
*/
modifier whenPaused() {
require(_paused);
_;
}

/**
* @dev called by the owner to pause, triggers stopped state
*/
function pause() public onlyPauser whenNotPaused {
_paused = true;
emit Paused(msg.sender);
}

/**
* @dev called by the owner to unpause, returns to normal state
*/
function unpause() public onlyPauser whenPaused {
_paused = false;
emit Unpaused(msg.sender);
}
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Pausable.sol

pragma solidity ^0.5.0;

/**
* @title Pausable token
* @dev ERC20 modified with pausable transfers.
**/
contract ERC20Pausable is ERC20, Pausable {
function transfer(address to, uint256 value) public whenNotPaused returns (bool) {
return super.transfer(to, value);
}

function transferFrom(address from, address to, uint256 value) public whenNotPaused returns (bool) {
return super.transferFrom(from, to, value);
}

function approve(address spender, uint256 value) public whenNotPaused returns (bool) {
return super.approve(spender, value);
}

}

function decreaseAllowance(address spender, uint subtractedValue) public whenNotPaused returns (bool success) {
return super.decreaseAllowance(spender, subtractedValue);
}
}

// File: openzeppelin-solidity/contracts/access/roles/MinterRole.sol

pragma solidity ^0.5.0;

contract MinterRole {
using Roles for Roles.Role;

Roles.Role private _minters;

constructor () internal {
}

modifier onlyMinter() {
require(isMinter(msg.sender));
_;
}

function isMinter(address account) public view returns (bool) {
return _minters.has(account);
}

}

function renounceMinter() public {
_removeMinter(msg.sender);
}

}

_minters.remove(account);
emit MinterRemoved(account);
}
}

// File: openzeppelin-solidity/contracts/token/ERC20/ERC20Mintable.sol

pragma solidity ^0.5.0;

/**
* @title ERC20Mintable
* @dev ERC20 minting logic
*/
contract ERC20Mintable is ERC20, MinterRole {
/**
* @dev Function to mint tokens
* @param value The amount of tokens to mint.
* @return A boolean that indicates if the operation was successful.
*/
function mint(address to, uint256 value) public onlyMinter returns (bool) {
_mint(to, value);
return true;
}
}

// File: openzeppelin-solidity/contracts/ownership/Ownable.sol

pragma solidity ^0.5.0;

/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {

/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor () internal {
_owner = msg.sender;
}

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

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

/**
* @return true if `msg.sender` is the owner of the contract.
*/
function isOwner() public view returns (bool) {
return msg.sender == _owner;
}

/**
* @dev Allows the current owner to relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
}

/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
_transferOwnership(newOwner);
}

/**
* @dev Transfers control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}

// File: contracts/whitelist/IWhitelist.sol

pragma solidity ^0.5.0;

// Interface to be implemented by the Whitelist contract.
contract IWhitelist {
function isWhitelisted(address account) public view returns (bool);
}

// File: contracts/token/BurnerRole.sol

pragma solidity ^0.5.0;

contract BurnerRole {
using Roles for Roles.Role;

Roles.Role private _burners;

constructor () internal {
}

modifier onlyBurner() {
require(isBurner(msg.sender));
_;
}

function isBurner(address account) public view returns (bool) {
return _burners.has(account);
}

}

function renounceBurner() public {
_removeBurner(msg.sender);
}

}

_burners.remove(account);
emit BurnerRemoved(account);
}
}

// File: contracts/token/ERC20Burnable.sol

pragma solidity ^0.5.0;

// Only allow accounts with the burner role to burn tokens.
contract ERC20Burnable is ERC20, BurnerRole {
function burn(uint256 value) public onlyBurner() {
_burn(msg.sender, value);
}

function burnFrom(address from, uint256 value) public onlyBurner() {
_burnFrom(from, value);
}
}

// File: contracts/token/ERC20Whitelistable.sol

pragma solidity ^0.5.0;

// Disallow transfers of the token to or from blacklisted accounts.
contract ERC20Whitelistable is ERC20Mintable, ERC20Burnable, Ownable {
event WhitelistChanged(IWhitelist indexed account);

IWhitelist public whitelist;

function setWhitelist(IWhitelist _whitelist) public onlyOwner {
whitelist = _whitelist;
emit WhitelistChanged(_whitelist);
}

require(isWhitelisted(account));
_;
}

require(!isWhitelisted(account));
_;
}

// Returns true if the account is allowed to send and receive tokens.
function isWhitelisted(address account) public view returns (bool) {
return whitelist.isWhitelisted(account);
}

public
onlyWhitelisted(msg.sender)
onlyWhitelisted(to)
returns (bool)
{
return super.transfer(to, value);
}

public
onlyWhitelisted(from)
onlyWhitelisted(to)
returns (bool)
{
return super.transferFrom(from, to, value);
}

function mint(address to, uint256 value) public onlyWhitelisted(to) returns (bool) {
return super.mint(to, value);
}

// Destroy the tokens held by a blacklisted account.
public
onlyBurner()
notWhitelisted(from)
{
_burn(from, value);
}
}

// File: contracts/utils/CanReclaimEther.sol

pragma solidity ^0.5.0;

// Ether should not be sent to this contract. If any ether is accidentally sent to this
// contract, allow the contract owner to recover it.
// Copied from https://github.com/OpenZeppelin/openzeppelin-solidity/blob/2441fd7d17bffa1944f6f539b2cddd6d19997a31/contracts/ownership/HasNoEther.sol
contract CanReclaimEther is Ownable {
function reclaimEther() external onlyOwner {
}
}

// File: openzeppelin-solidity/contracts/token/ERC20/SafeERC20.sol

pragma solidity ^0.5.0;

/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure.
* To use this library you can add a `using SafeERC20 for ERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;

function safeTransfer(IERC20 token, address to, uint256 value) internal {
require(token.transfer(to, value));
}

require(token.transferFrom(from, to, value));
}

function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require((value == 0) || (token.allowance(address(this), spender) == 0));
require(token.approve(spender, value));
}

function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
require(token.approve(spender, newAllowance));
}

function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
require(token.approve(spender, newAllowance));
}
}

// File: contracts/utils/CanReclaimToken.sol

pragma solidity ^0.5.0;

// Tokens should not be sent to this contract.  If any tokens are accidentally sent to
// this contract, allow the contract owner to recover them.
contract CanReclaimToken is Ownable {
using SafeERC20 for IERC20;

function reclaimToken(IERC20 token) external onlyOwner {
token.safeTransfer(owner(), balance);
}
}

// File: contracts/token/LeveragedToken.sol

pragma solidity ^0.5.0;

contract LeveragedToken is
ERC20Detailed,
ERC20Pausable,
ERC20Mintable,
ERC20Burnable,
ERC20Whitelistable,
CanReclaimEther,
CanReclaimToken
{
string public underlying;
int8 public leverage;

constructor(string memory name, string memory symbol, string memory _underlying, int8 _leverage)
ERC20Detailed(name, symbol, 18)
public
{
underlying = _underlying;
leverage = _leverage;
}
}```