Contract Name:
PolygonZkEvmAdapter02
Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @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, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
/**
* @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) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
/**
* @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) {
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, reverting 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) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting 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) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* 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);
return a - b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryDiv}.
*
* 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);
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* 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;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
/**
* @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);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.8.0;
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/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 {
// 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'
// solhint-disable-next-line max-line-length
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).add(value);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
/**
* @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: MIT
pragma solidity >=0.6.2 <0.8.0;
/**
* @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 v3.4._
*/
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 v3.4._
*/
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: ISC
pragma solidity 0.7.5;
pragma abicoder v2;
import "../lib/Utils.sol";
interface IAdapter {
/**
* @dev Certain adapters needs to be initialized.
* This method will be called from Augustus
*/
function initialize(bytes calldata data) external;
/**
* @dev The function which performs the swap on an exchange.
* @param fromToken Address of the source token
* @param toToken Address of the destination token
* @param fromAmount Amount of source tokens to be swapped
* @param networkFee NOT USED - Network fee to be used in this router
* @param route Route to be followed
*/
function swap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256 networkFee,
Utils.Route[] calldata route
) external payable;
}
// SPDX-License-Identifier: ISC
pragma solidity 0.7.5;
pragma abicoder v2;
import "../IAdapter.sol";
import "../../lib/aave-v3/AaveV3.sol";
/*
* @dev This contract will route calls to dexes according to the following indexing:
* 1 - UniswapV3
* 2 - GMX
* 3 - WETH
* 4 - BalancerV2
* 5 - UniswapV2Forks
* 6 - WooFiV2
* 7 - AaveV3
*/
contract PolygonZkEvmAdapter02 is IAdapter, AaveV3 {
using SafeMath for uint256;
constructor(
uint16 _aaveV3RefCode,
address _aaveV3Pool,
address _aaveV3WethGateway
) public AaveV3(_aaveV3RefCode, _aaveV3Pool, _aaveV3WethGateway) {}
function initialize(bytes calldata) external override {
revert("METHOD NOT IMPLEMENTED");
}
function swap(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
uint256,
Utils.Route[] calldata route
) external payable override {
for (uint256 i = 0; i < route.length; i++) {
if (route[i].index == 1) {
//swap on AaveV3
swapOnAaveV3(fromToken, toToken, fromAmount.mul(route[i].percent).div(10000), route[i].payload);
} else {
revert("Index not supported");
}
}
}
}
// SPDX-License-Identifier: ISC
pragma solidity 0.7.5;
import "./ITokenTransferProxy.sol";
contract AugustusStorage {
struct FeeStructure {
uint256 partnerShare;
bool noPositiveSlippage;
bool positiveSlippageToUser;
uint16 feePercent;
string partnerId;
bytes data;
}
ITokenTransferProxy internal tokenTransferProxy;
address payable internal feeWallet;
mapping(address => FeeStructure) internal registeredPartners;
mapping(bytes4 => address) internal selectorVsRouter;
mapping(bytes32 => bool) internal adapterInitialized;
mapping(bytes32 => bytes) internal adapterVsData;
mapping(bytes32 => bytes) internal routerData;
mapping(bytes32 => bool) internal routerInitialized;
bytes32 public constant WHITELISTED_ROLE = keccak256("WHITELISTED_ROLE");
bytes32 public constant ROUTER_ROLE = keccak256("ROUTER_ROLE");
}
// SPDX-License-Identifier: ISC
pragma solidity 0.7.5;
interface ITokenTransferProxy {
function transferFrom(
address token,
address from,
address to,
uint256 amount
) external;
}
pragma solidity 0.7.5;
pragma abicoder v2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../Utils.sol";
import "../../AugustusStorage.sol";
interface IAaveV3WETHGateway {
function depositETH(
address pool,
address onBehalfOf,
uint16 referralCode
) external payable;
function withdrawETH(
address pool,
uint256 amount,
address onBehalfOf
) external;
}
interface IAaveV3Pool {
function supply(
IERC20 asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
function withdraw(
IERC20 asset,
uint256 amount,
address to
) external returns (uint256);
}
contract AaveV3 {
struct AaveData {
address aToken;
}
uint16 public immutable aaveV3RefCode;
address public immutable aaveV3Pool;
address public immutable aaveV3WethGateway;
constructor(
uint16 _refCode,
address _pool,
address _wethGateway
) public {
aaveV3RefCode = _refCode;
aaveV3Pool = _pool;
aaveV3WethGateway = _wethGateway;
}
function swapOnAaveV3(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
bytes calldata payload
) internal {
_swapOnAaveV3(fromToken, toToken, fromAmount, payload);
}
function buyOnAaveV3(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
bytes calldata payload
) internal {
_swapOnAaveV3(fromToken, toToken, fromAmount, payload);
}
function _swapOnAaveV3(
IERC20 fromToken,
IERC20 toToken,
uint256 fromAmount,
bytes memory payload
) private {
AaveData memory data = abi.decode(payload, (AaveData));
if (address(fromToken) == address(data.aToken)) {
if (address(toToken) == Utils.ethAddress()) {
Utils.approve(aaveV3WethGateway, address(fromToken), fromAmount);
IAaveV3WETHGateway(aaveV3WethGateway).withdrawETH(aaveV3Pool, fromAmount, address(this));
} else {
Utils.approve(aaveV3Pool, address(fromToken), fromAmount);
IAaveV3Pool(aaveV3Pool).withdraw(toToken, fromAmount, address(this));
}
} else if (address(toToken) == address(data.aToken)) {
if (address(fromToken) == Utils.ethAddress()) {
IAaveV3WETHGateway(aaveV3WethGateway).depositETH{ value: fromAmount }(
aaveV3Pool,
address(this),
aaveV3RefCode
);
} else {
Utils.approve(aaveV3Pool, address(fromToken), fromAmount);
IAaveV3Pool(aaveV3Pool).supply(fromToken, fromAmount, address(this), aaveV3RefCode);
}
} else {
revert("Invalid aToken");
}
}
}
// SPDX-License-Identifier: ISC
pragma solidity 0.7.5;
pragma abicoder v2;
import "../Utils.sol";
interface IBalancerV2Vault {
enum SwapKind {
GIVEN_IN,
GIVEN_OUT
}
struct SingleSwap {
bytes32 poolId;
SwapKind kind;
address assetIn;
address assetOut;
uint256 amount;
bytes userData;
}
struct BatchSwapStep {
bytes32 poolId;
uint256 assetInIndex;
uint256 assetOutIndex;
uint256 amount;
bytes userData;
}
struct FundManagement {
address sender;
bool fromInternalBalance;
address payable recipient;
bool toInternalBalance;
}
function swap(
SingleSwap memory singleSwap,
FundManagement memory funds,
uint256 limit,
uint256 deadline
) external payable returns (uint256);
function batchSwap(
SwapKind kind,
BatchSwapStep[] memory swaps,
address[] memory assets,
FundManagement memory funds,
int256[] memory limits,
uint256 deadline
) external payable returns (int256[] memory);
}
/*solhint-disable avoid-low-level-calls */
// SPDX-License-Identifier: ISC
pragma solidity 0.7.5;
pragma experimental ABIEncoderV2;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../ITokenTransferProxy.sol";
import { IBalancerV2Vault } from "./balancerv2/IBalancerV2Vault.sol";
interface IERC20Permit {
function permit(
address owner,
address spender,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
interface IERC20PermitLegacy {
function permit(
address holder,
address spender,
uint256 nonce,
uint256 expiry,
bool allowed,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
library Utils {
using SafeMath for uint256;
using SafeERC20 for IERC20;
address private constant ETH_ADDRESS = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
uint256 private constant MAX_UINT = type(uint256).max;
enum CurveSwapType {
EXCHANGE,
EXCHANGE_UNDERLYING,
EXCHANGE_GENERIC_FACTORY_ZAP
}
/**
* @param fromToken Address of the source token
* @param fromAmount Amount of source tokens to be swapped
* @param toAmount Minimum destination token amount expected out of this swap
* @param expectedAmount Expected amount of destination tokens without slippage
* @param beneficiary Beneficiary address
* 0 then 100% will be transferred to beneficiary. Pass 10000 for 100%
* @param path Route to be taken for this swap to take place
*/
struct SellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
Utils.Path[] path;
address payable partner;
uint256 feePercent;
bytes permit;
uint256 deadline;
bytes16 uuid;
}
struct BuyData {
address adapter;
address fromToken;
address toToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
Utils.Route[] route;
address payable partner;
uint256 feePercent;
bytes permit;
uint256 deadline;
bytes16 uuid;
}
struct MegaSwapSellData {
address fromToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address payable beneficiary;
Utils.MegaSwapPath[] path;
address payable partner;
uint256 feePercent;
bytes permit;
uint256 deadline;
bytes16 uuid;
}
struct SimpleData {
address fromToken;
address toToken;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
address[] callees;
bytes exchangeData;
uint256[] startIndexes;
uint256[] values;
address payable beneficiary;
address payable partner;
uint256 feePercent;
bytes permit;
uint256 deadline;
bytes16 uuid;
}
struct DirectUniV3 {
address fromToken;
address toToken;
address exchange;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
uint256 feePercent;
uint256 deadline;
address payable partner;
bool isApproved;
address payable beneficiary;
bytes path;
bytes permit;
bytes16 uuid;
}
struct DirectCurveV1 {
address fromToken;
address toToken;
address exchange;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
uint256 feePercent;
int128 i;
int128 j;
address payable partner;
bool isApproved;
CurveSwapType swapType;
address payable beneficiary;
bool needWrapNative;
bytes permit;
bytes16 uuid;
}
struct DirectCurveV2 {
address fromToken;
address toToken;
address exchange;
address poolAddress;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
uint256 feePercent;
uint256 i;
uint256 j;
address payable partner;
bool isApproved;
CurveSwapType swapType;
address payable beneficiary;
bool needWrapNative;
bytes permit;
bytes16 uuid;
}
struct DirectBalancerV2 {
IBalancerV2Vault.BatchSwapStep[] swaps;
address[] assets;
IBalancerV2Vault.FundManagement funds;
int256[] limits;
uint256 fromAmount;
uint256 toAmount;
uint256 expectedAmount;
uint256 deadline;
uint256 feePercent;
address vault;
address payable partner;
bool isApproved;
address payable beneficiary;
bytes permit;
bytes16 uuid;
}
struct Adapter {
address payable adapter;
uint256 percent;
uint256 networkFee; //NOT USED
Route[] route;
}
struct Route {
uint256 index; //Adapter at which index needs to be used
address targetExchange;
uint256 percent;
bytes payload;
uint256 networkFee; //NOT USED - Network fee is associated with 0xv3 trades
}
struct MegaSwapPath {
uint256 fromAmountPercent;
Path[] path;
}
struct Path {
address to;
uint256 totalNetworkFee; //NOT USED - Network fee is associated with 0xv3 trades
Adapter[] adapters;
}
function ethAddress() internal pure returns (address) {
return ETH_ADDRESS;
}
function maxUint() internal pure returns (uint256) {
return MAX_UINT;
}
function approve(
address addressToApprove,
address token,
uint256 amount
) internal {
if (token != ETH_ADDRESS) {
IERC20 _token = IERC20(token);
uint256 allowance = _token.allowance(address(this), addressToApprove);
if (allowance < amount) {
_token.safeApprove(addressToApprove, 0);
_token.safeIncreaseAllowance(addressToApprove, MAX_UINT);
}
}
}
function transferTokens(
address token,
address payable destination,
uint256 amount
) internal {
if (amount > 0) {
if (token == ETH_ADDRESS) {
(bool result, ) = destination.call{ value: amount, gas: 10000 }("");
require(result, "Failed to transfer Ether");
} else {
IERC20(token).safeTransfer(destination, amount);
}
}
}
function tokenBalance(address token, address account) internal view returns (uint256) {
if (token == ETH_ADDRESS) {
return account.balance;
} else {
return IERC20(token).balanceOf(account);
}
}
function permit(address token, bytes memory permit) internal {
if (permit.length == 32 * 7) {
(bool success, ) = token.call(abi.encodePacked(IERC20Permit.permit.selector, permit));
require(success, "Permit failed");
}
if (permit.length == 32 * 8) {
(bool success, ) = token.call(abi.encodePacked(IERC20PermitLegacy.permit.selector, permit));
require(success, "Permit failed");
}
}
function transferETH(address payable destination, uint256 amount) internal {
if (amount > 0) {
(bool result, ) = destination.call{ value: amount, gas: 10000 }("");
require(result, "Transfer ETH failed");
}
}
}