Contract Source Code:
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
/**
* @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) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @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");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.3._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
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);
}
}
}
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
import "./IERC20.sol";
import "./IERC31337.sol";
import "./TokensRecoverable.sol";
import "./IUniswapV2Router02.sol";
contract Arbitrage is TokensRecoverable
{
IERC20 public immutable baseToken;
IERC31337 public immutable eliteToken;
IERC20 public immutable rootedToken;
IUniswapV2Router02 public immutable uniswapRouter;
mapping (address => bool) public arbitrageurs;
event Profit(uint256 _value);
constructor(IERC20 _baseToken, IERC31337 _eliteToken, IERC20 _rootedToken, IUniswapV2Router02 _uniswapRouter)
{
baseToken = _baseToken;
eliteToken = _eliteToken;
rootedToken = _rootedToken;
uniswapRouter = _uniswapRouter;
_baseToken.approve(address(_uniswapRouter), uint256(-1));
_eliteToken.approve(address(_uniswapRouter), uint256(-1));
_rootedToken.approve(address(_uniswapRouter), uint256(-1));
_baseToken.approve(address(_eliteToken), uint256(-1));
}
modifier arbitrageurOnly()
{
require(arbitrageurs[msg.sender], "Not an arbitrageur");
_;
}
function setArbitrageur(address arbitrageur, bool allow) public ownerOnly()
{
arbitrageurs[arbitrageur] = allow;
}
function balancePriceBase(uint256 baseAmount, uint256 minAmountOut) public arbitrageurOnly()
{
uint256 rootedAmount = buyRootedToken(address(baseToken), baseAmount, 0);
uint256 eliteAmount = sellRootedToken(address(eliteToken), rootedAmount, minAmountOut);
require(eliteAmount > baseAmount, "No profit");
eliteToken.withdrawTokens(eliteAmount);
emit Profit(eliteAmount - baseAmount);
}
function balancePriceElite(uint256 eliteAmount, uint256 minAmountOut) public arbitrageurOnly()
{
eliteToken.depositTokens(eliteAmount);
uint256 rootedAmount = buyRootedToken(address(eliteToken), eliteAmount, 0);
uint256 baseAmount = sellRootedToken(address(baseToken), rootedAmount, minAmountOut);
require(baseAmount > eliteAmount, "No profit");
emit Profit(baseAmount - eliteAmount);
}
function buyRootedToken(address token, uint256 amountToSpend, uint256 minAmountOut) private returns (uint256)
{
address[] memory path = new address[](2);
path[0] = address(token);
path[1] = address(rootedToken);
uint256[] memory amounts = uniswapRouter.swapExactTokensForTokens(amountToSpend, minAmountOut, path, address(this), block.timestamp);
return amounts[1];
}
function sellRootedToken(address token, uint256 amountToSpend, uint256 minAmountOut) private returns (uint256)
{
address[] memory path = new address[](2);
path[0] = address(rootedToken);
path[1] = address(token);
uint256[] memory amounts = uniswapRouter.swapExactTokensForTokens(amountToSpend, minAmountOut, path, address(this), block.timestamp);
return amounts[1];
}
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
interface IERC20
{
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _owner, address indexed _spender, uint256 _value);
function totalSupply() external view returns (uint256);
function balanceOf(address _account) external view returns (uint256);
function transfer(address _recipient, uint256 _amount) external returns (bool);
function allowance(address _owner, address _spender) external view returns (uint256);
function approve(address _spender, uint256 _amount) external returns (bool);
function transferFrom(address _sender, address _recipient, uint256 _amount) external returns (bool);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
import "./IWrappedERC20.sol";
import "./IFloorCalculator.sol";
interface IERC31337 is IWrappedERC20
{
function floorCalculator() external view returns (IFloorCalculator);
function sweepers(address _sweeper) external view returns (bool);
function setFloorCalculator(IFloorCalculator _floorCalculator) external;
function setSweeper(address _sweeper, bool _allow) external;
function sweepFloor(address _to) external returns (uint256 amountSwept);
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
import "./IERC20.sol";
interface IFloorCalculator
{
function calculateSubFloor(IERC20 wrappedToken, IERC20 backingToken) external view returns (uint256);
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
interface IOwned
{
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
function owner() external view returns (address);
function transferOwnership(address newOwner) external;
function claimOwnership() external;
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
import "./IERC20.sol";
interface ITokensRecoverable
{
function recoverTokens(IERC20 token) external;
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
import './IUniswapV2Router01.sol';
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
import "./IERC20.sol";
import "./IWrappedERC20Events.sol";
interface IWrappedERC20 is IERC20, IWrappedERC20Events
{
function wrappedToken() external view returns (IERC20);
function depositTokens(uint256 _amount) external;
function withdrawTokens(uint256 _amount) external;
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
interface IWrappedERC20Events
{
event Deposit(address indexed from, uint256 amount);
event Withdrawal(address indexed to, uint256 amount);
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
/* ROOTKIT:
Provides ownerOnly() modifier
Allows for ownership transfer but requires the new
owner to claim (accept) ownership
Safer because no accidental transfers or renouncing
*/
import "./IOwned.sol";
abstract contract Owned is IOwned
{
address public override owner = msg.sender;
address internal pendingOwner;
modifier ownerOnly()
{
require (msg.sender == owner, "Owner only");
_;
}
function transferOwnership(address newOwner) public override ownerOnly()
{
pendingOwner = newOwner;
}
function claimOwnership() public override
{
require (pendingOwner == msg.sender);
pendingOwner = address(0);
emit OwnershipTransferred(owner, msg.sender);
owner = msg.sender;
}
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
/* ROOTKIT:
Modified to remove some junk
Also modified to remove silly restrictions (traps!) within safeApprove
*/
import "./IERC20.sol";
import "./SafeMath.sol";
import "./Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using SafeMath for uint256;
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
/* ROOTKIT:
O wherefore art thou 8 point O
*/
library SafeMath
{
function add(uint256 a, uint256 b) internal pure returns (uint256)
{
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256)
{
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256)
{
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
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;
}
function div(uint256 a, uint256 b) internal pure returns (uint256)
{
return div(a, b, "SafeMath: division by zero");
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256)
{
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256)
{
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256)
{
require(b != 0, errorMessage);
return a % b;
}
}
// SPDX-License-Identifier: J-J-J-JENGA!!!
pragma solidity ^0.7.4;
/* ROOTKIT:
Allows recovery of unexpected tokens (airdrops, etc)
Inheriters can customize logic by overriding canRecoverTokens
*/
import "./IERC20.sol";
import "./SafeERC20.sol";
import "./Owned.sol";
import "./ITokensRecoverable.sol";
abstract contract TokensRecoverable is Owned, ITokensRecoverable
{
using SafeERC20 for IERC20;
function recoverTokens(IERC20 token) public override ownerOnly()
{
require (canRecoverTokens(token));
token.safeTransfer(msg.sender, token.balanceOf(address(this)));
}
function canRecoverTokens(IERC20 token) internal virtual view returns (bool)
{
return address(token) != address(this);
}
}