Contract Name:
SwitchStargateSender
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @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);
/**
* @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 `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, 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 `from` to `to` 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 from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.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 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'
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) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @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
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @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
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 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");
(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 functionCallWithValue(target, data, 0, "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");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, 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) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// 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
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @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 meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "../dexs/Switch.sol";
import { IStargateRouter, IFactory, IPool } from "../interfaces/IStargateRouter.sol";
import { IStargateEthRouter } from "../interfaces/IStargateEthRouter.sol";
import "../lib/DataTypes.sol";
contract SwitchStargateSender is Switch {
using UniversalERC20 for IERC20;
using SafeERC20 for IERC20;
address public stargateRouter;
address public stargateEthRouter;
struct StargateSwapRequest {
bytes32 id;
bytes32 bridge;
address srcToken;
address bridgeToken;
address dstToken;
address recipient;
uint256 srcAmount;
uint256 bridgeDstAmount;
uint256 estimatedDstAmount;
DataTypes.ParaswapUsageStatus paraswapUsageStatus;
uint256[] dstDistribution;
bytes dstParaswapData;
}
struct SwapArgsStargate {
DataTypes.SwapInfo srcSwap;
DataTypes.SwapInfo dstSwap;
address payable recipient;
address partner;
DataTypes.ParaswapUsageStatus paraswapUsageStatus;
uint256 srcPoolId;
uint256 dstPoolId;
uint256 amount;
uint256 minDstAmount;
uint256 bridgeDstAmount;
uint256 dstGasForCall;
uint256 dstNativeAmount;
uint256 estimatedDstTokenAmount;
uint256[] srcDistribution;
uint256[] dstDistribution;
uint16 dstChainId;
bytes32 id;
bytes32 bridge;
bytes callTo;
bytes srcParaswapData;
bytes dstParaswapData;
}
struct TransferArgsStargate {
address fromToken;
address destToken;
address payable recipient;
address partner;
uint256 amount;
uint256 minDstAmount;
uint256 bridgeDstAmount;
uint256 dstGasForCall;
uint256 dstNativeAmount;
uint256 srcPoolId;
uint256 dstPoolId;
uint16 dstChainId;
bytes32 id;
bytes32 bridge;
}
event StargateRouterSet(address stargateRouter);
event StargateEthRouterSet(address stargateEthRouter);
constructor(
address _weth,
address _otherToken,
uint256[] memory _pathCountAndSplit,
address[] memory _factories,
address _switchViewAddress,
address _switchEventAddress,
address _stargateRouter,
address _stargateEthRouter,
address _paraswapProxy,
address _augustusSwapper
) Switch(_weth, _otherToken, _pathCountAndSplit[0], _pathCountAndSplit[1], _factories, _switchViewAddress, _switchEventAddress, _paraswapProxy, _augustusSwapper)
public
{
stargateRouter = _stargateRouter;
stargateEthRouter = _stargateEthRouter;
}
function setStargateRouter(address _newStargateRouter) external onlyOwner {
stargateRouter = _newStargateRouter;
emit StargateRouterSet(_newStargateRouter);
}
function setStargateEthRouter(address _newStargateEthRouter) external onlyOwner {
stargateEthRouter = _newStargateEthRouter;
emit StargateEthRouterSet(_newStargateEthRouter);
}
function getLayerZeroFee(
StargateSwapRequest calldata request,
uint16 dstChainId,
uint256 dstGasForCall,
uint256 dstNativeAmount,
address receiver
)
public
view
returns(uint256, uint256)
{
bytes memory message = abi.encode(
StargateSwapRequest({
id: request.id,
bridge: request.bridge,
srcToken: request.srcToken,
bridgeToken: request.bridgeToken,
dstToken: request.dstToken,
recipient: request.recipient,
srcAmount: request.srcAmount,
dstDistribution: request.dstDistribution,
dstParaswapData: request.dstParaswapData,
paraswapUsageStatus: request.paraswapUsageStatus,
bridgeDstAmount: request.bridgeDstAmount,
estimatedDstAmount: request.estimatedDstAmount
})
);
return IStargateRouter(stargateRouter).quoteLayerZeroFee(
dstChainId,
1, // TYPE_SWAP_REMOTE on Bridge
abi.encodePacked(receiver),
message,
IStargateRouter.lzTxObj(
dstGasForCall,
dstNativeAmount,
abi.encodePacked(receiver)
)
);
}
function getLayerZeroFeeWithoutMessage(
uint16 dstChainId,
uint256 dstGasForCall,
uint256 dstNativeAmount,
address receiver
)
external
view
returns(uint256, uint256)
{
return IStargateRouter(stargateRouter).quoteLayerZeroFee(
dstChainId,
1, // TYPE_SWAP_REMOTE on Bridge
abi.encodePacked(receiver),
"0x",
IStargateRouter.lzTxObj(
dstGasForCall,
dstNativeAmount,
abi.encodePacked(receiver)
)
);
}
function transferByStargate(
TransferArgsStargate calldata transferArgs
)
external
payable
nonReentrant
{
require(transferArgs.recipient == msg.sender, "recipient must be equal to caller");
IERC20(transferArgs.fromToken).universalTransferFrom(msg.sender, address(this), transferArgs.amount);
uint256 amountAfterFee = _getAmountAfterFee(IERC20(transferArgs.fromToken), transferArgs.amount, transferArgs.partner);
(uint256 nativeFee, ) = _getLayerZeroFee("0x", transferArgs.dstChainId, transferArgs.dstGasForCall, transferArgs.dstNativeAmount, abi.encodePacked(transferArgs.recipient));
if (IERC20(transferArgs.fromToken).isETH()) {
require(msg.value >= transferArgs.amount + nativeFee, 'native token is not enough');
IStargateEthRouter(stargateEthRouter).swapETH{value:msg.value}(
transferArgs.dstChainId, // the minimum amount accepted out on destination
transferArgs.recipient, // refund additional messageFee to this address
abi.encodePacked(transferArgs.recipient), // the receiver of the destination ETH
amountAfterFee, // the amount, in Local Decimals, to be swapped
transferArgs.minDstAmount // the minimum amount accepted out on destination
);
} else {
require(msg.value >= nativeFee, 'native token is not enough');
address token = getTokenFromPoolId(stargateRouter, transferArgs.srcPoolId);
if (token != transferArgs.fromToken) {
revert("invalid token address");
}
uint256 approvedAmount = IERC20(token).allowance(address(this), stargateRouter);
if (approvedAmount < amountAfterFee) {
IERC20(token).safeIncreaseAllowance(stargateRouter, amountAfterFee - approvedAmount);
}
IStargateRouter(stargateRouter).swap{value:msg.value}(
transferArgs.dstChainId,
transferArgs.srcPoolId, // source pool id
transferArgs.dstPoolId, // dest pool id
transferArgs.recipient, // refund adddress. extra gas (if any) is returned to this address
amountAfterFee, // quantity to swap
transferArgs.minDstAmount, // the min qty you would accept on the destination
IStargateRouter.lzTxObj(
transferArgs.dstGasForCall,
transferArgs.dstNativeAmount,
abi.encodePacked(transferArgs.recipient)
),
abi.encodePacked(transferArgs.recipient), // the address to send the tokens to on the destination
"0x" // bytes param, if you wish to send additional payload you can abi.encode() them here
);
}
_emitCrossChainTransferRequest(transferArgs, bytes32(0), amountAfterFee, msg.sender, DataTypes.SwapStatus.Succeeded);
}
function swapByStargate(
SwapArgsStargate calldata transferArgs
)
external
payable
nonReentrant
{
require(transferArgs.recipient == msg.sender, "recipient must be equal to caller");
IERC20(transferArgs.srcSwap.srcToken).universalTransferFrom(msg.sender, address(this), transferArgs.amount);
uint256 returnAmount = 0;
uint256 amountAfterFee = _getAmountAfterFee(IERC20(transferArgs.srcSwap.srcToken), transferArgs.amount, transferArgs.partner);
if (transferArgs.srcSwap.srcToken == transferArgs.srcSwap.dstToken) {
returnAmount = amountAfterFee;
} else {
if ((transferArgs.paraswapUsageStatus == DataTypes.ParaswapUsageStatus.OnSrcChain) || (transferArgs.paraswapUsageStatus == DataTypes.ParaswapUsageStatus.Both)) {
returnAmount = _swapFromParaswap(transferArgs, amountAfterFee);
} else {
(returnAmount, ) = _swapBeforeStargate(transferArgs, amountAfterFee);
}
}
bytes memory message = abi.encode(
StargateSwapRequest({
id: transferArgs.id,
bridge: transferArgs.bridge,
srcToken: transferArgs.srcSwap.srcToken,
bridgeToken: transferArgs.dstSwap.srcToken,
dstToken: transferArgs.dstSwap.dstToken,
recipient: transferArgs.recipient,
srcAmount: returnAmount,
dstDistribution: transferArgs.dstDistribution,
dstParaswapData: transferArgs.dstParaswapData,
paraswapUsageStatus: transferArgs.paraswapUsageStatus,
bridgeDstAmount: transferArgs.bridgeDstAmount,
estimatedDstAmount: transferArgs.estimatedDstTokenAmount
})
);
(uint256 nativeFee, ) = _getLayerZeroFee(message, transferArgs.dstChainId, transferArgs.dstGasForCall, transferArgs.dstNativeAmount, transferArgs.callTo);
if (IERC20(transferArgs.srcSwap.srcToken).isETH()) {
require(msg.value >= transferArgs.amount + nativeFee, 'native token is not enough');
} else {
require(msg.value >= nativeFee, 'native token is not enough');
}
if (!IERC20(transferArgs.srcSwap.dstToken).isETH()) {
uint256 approvedAmount = IERC20(transferArgs.srcSwap.dstToken).allowance(address(this), stargateRouter);
if (approvedAmount < returnAmount) {
IERC20(transferArgs.srcSwap.dstToken).safeIncreaseAllowance(stargateRouter, returnAmount - approvedAmount);
}
}
IStargateRouter(stargateRouter).swap{value:nativeFee}(
transferArgs.dstChainId,
transferArgs.srcPoolId, // source pool id
transferArgs.dstPoolId, // dest pool id
transferArgs.recipient, // refund adddress. extra gas (if any) is returned to this address
returnAmount, // quantity to swap
transferArgs.minDstAmount, // the min qty you would accept on the destination
IStargateRouter.lzTxObj(
transferArgs.dstGasForCall,
transferArgs.dstNativeAmount,
transferArgs.callTo
),
transferArgs.callTo, // the address to send the tokens to on the destination
message // bytes param, if you wish to send additional payload you can abi.encode() them here
);
_emitCrossChainSwapRequest(transferArgs, bytes32(0), returnAmount, msg.sender, DataTypes.SwapStatus.Succeeded);
}
function getTokenFromPoolId(
address _router,
uint256 _poolId
)
private
view
returns (address)
{
address factory = IStargateRouter(_router).factory();
address pool = IFactory(factory).getPool(_poolId);
return IPool(pool).token();
}
function _swapBeforeStargate(
SwapArgsStargate calldata transferArgs,
uint256 amount
)
private
returns
(
uint256 returnAmount,
uint256 parts
)
{
parts = 0;
uint256 lastNonZeroIndex = 0;
for (uint i = 0; i < transferArgs.srcDistribution.length; i++) {
if (transferArgs.srcDistribution[i] > 0) {
parts += transferArgs.srcDistribution[i];
lastNonZeroIndex = i;
}
}
require(parts > 0, "invalid distribution param");
// break function to avoid stack too deep error
returnAmount = _swapInternalForSingleSwap(transferArgs.srcDistribution, amount, parts, lastNonZeroIndex, IERC20(transferArgs.srcSwap.srcToken), IERC20(transferArgs.srcSwap.dstToken));
require(returnAmount > 0, "Swap failed from dex");
switchEvent.emitSwapped(msg.sender, address(this), IERC20(transferArgs.srcSwap.srcToken), IERC20(transferArgs.srcSwap.dstToken), amount, returnAmount, 0);
}
function _swapFromParaswap(
SwapArgsStargate calldata swapArgs,
uint256 amount
)
private
returns (uint256 returnAmount)
{
// break function to avoid stack too deep error
returnAmount = _swapInternalWithParaSwap(IERC20(swapArgs.srcSwap.srcToken), IERC20(swapArgs.srcSwap.dstToken), amount, swapArgs.srcParaswapData);
}
function _getLayerZeroFee(
bytes memory message,
uint16 dstChainId,
uint256 dstGasForCall,
uint256 dstNativeAmount,
bytes memory receiver
)
internal
view
returns(uint256, uint256)
{
return IStargateRouter(stargateRouter).quoteLayerZeroFee(
dstChainId,
1, // TYPE_SWAP_REMOTE on Bridge
receiver,
message,
IStargateRouter.lzTxObj(
dstGasForCall,
dstNativeAmount,
receiver
)
);
}
function _emitCrossChainSwapRequest(
SwapArgsStargate calldata transferArgs,
bytes32 transferId,
uint256 returnAmount,
address sender,
DataTypes.SwapStatus status
)
internal
{
switchEvent.emitCrosschainSwapRequest(
transferArgs.id,
transferId,
transferArgs.bridge,
sender,
transferArgs.srcSwap.srcToken,
transferArgs.srcSwap.dstToken,
transferArgs.dstSwap.dstToken,
transferArgs.amount,
returnAmount,
transferArgs.estimatedDstTokenAmount,
status
);
}
function _emitCrossChainTransferRequest(
TransferArgsStargate calldata transferArgs,
bytes32 transferId,
uint256 returnAmount,
address sender,
DataTypes.SwapStatus status
)
internal
{
switchEvent.emitCrosschainSwapRequest(
transferArgs.id,
transferId,
transferArgs.bridge,
sender,
transferArgs.fromToken,
transferArgs.fromToken,
transferArgs.destToken,
transferArgs.amount,
returnAmount,
transferArgs.bridgeDstAmount,
status
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "../interfaces/IUniswapFactory.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
abstract contract ISwitchView {
struct ReturnArgs {
IERC20 fromToken;
IERC20 destToken;
uint256 amount;
uint256 parts;
}
struct CalculateArgs {
IERC20 fromToken;
IERC20 destToken;
IUniswapFactory factory;
uint256 amount;
uint256 parts;
}
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts
)
public
virtual
view
returns (
uint256 returnAmount,
uint256[] memory distribution
);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
abstract contract IWETH is IERC20 {
function deposit() external virtual payable;
function withdraw(uint256 amount) virtual external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "./ISwitchView.sol";
import "./IWETH.sol";
import "../lib/DisableFlags.sol";
import "../lib/UniversalERC20.sol";
import "../interfaces/IUniswapFactory.sol";
import "../lib/UniswapExchangeLib.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
abstract contract SwitchRoot is ISwitchView {
using DisableFlags for uint256;
using UniversalERC20 for IERC20;
using UniversalERC20 for IWETH;
using UniswapExchangeLib for IUniswapExchange;
address public ETH_ADDRESS = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
address public ZERO_ADDRESS = address(0);
uint256 public dexCount;
uint256 public pathCount;
uint256 public pathSplit;
IWETH public weth; // chain's native token
IWETH public otherToken; //could be weth on a non-eth chain or other mid token(like busd)
address[] public factories;
int256 internal constant VERY_NEGATIVE_VALUE = -1e72;
constructor(address _weth, address _otherToken, uint256 _pathCount, uint256 _pathSplit, address[] memory _factories) {
weth = IWETH(_weth);
otherToken = IWETH(_otherToken);
pathCount = _pathCount;
pathSplit = _pathSplit;
dexCount = _factories.length;
for (uint256 i = 0; i < _factories.length; i++) {
factories.push(_factories[i]);
}
}
function _findBestDistribution(
uint256 s, // parts
int256[][] memory amounts // exchangesReturns
)
internal
view
returns (
int256 returnAmount,
uint256[] memory distribution
)
{
uint256 n = amounts.length;
int256[][] memory answer = new int256[][](n); // int[n][s+1]
uint256[][] memory parent = new uint256[][](n); // int[n][s+1]
for (uint i = 0; i < n; i++) {
answer[i] = new int256[](s + 1);
parent[i] = new uint256[](s + 1);
}
for (uint j = 0; j <= s; j++) {
answer[0][j] = amounts[0][j];
for (uint i = 1; i < n; i++) {
answer[i][j] = -1e72;
}
parent[0][j] = 0;
}
for (uint i = 1; i < n; i++) {
for (uint j = 0; j <= s; j++) {
answer[i][j] = answer[i - 1][j];
parent[i][j] = j;
for (uint k = 1; k <= j; k++) {
if (answer[i - 1][j - k] + amounts[i][k] > answer[i][j]) {
answer[i][j] = answer[i - 1][j - k] + amounts[i][k];
parent[i][j] = j - k;
}
}
}
}
distribution = new uint256[](dexCount*pathCount*pathSplit);
uint256 partsLeft = s;
unchecked {
for (uint curExchange = n - 1; partsLeft > 0; curExchange--) {
distribution[curExchange] = partsLeft - parent[curExchange][partsLeft];
partsLeft = parent[curExchange][partsLeft];
}
}
returnAmount = (answer[n - 1][s] == VERY_NEGATIVE_VALUE) ? int256(0) : answer[n - 1][s];
}
function _linearInterpolation(
uint256 value,
uint256 parts
)
internal
pure
returns (uint256[] memory rets)
{
rets = new uint256[](parts);
for (uint i = 0; i < parts; i++) {
rets[i] = value * (i + 1) / parts;
}
}
function _tokensEqual(
IERC20 tokenA,
IERC20 tokenB
)
internal
pure
returns (bool)
{
return ((tokenA.isETH() && tokenB.isETH()) || tokenA == tokenB);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "../core/ISwitchView.sol";
import "../core/SwitchRoot.sol";
import "../interfaces/ISwitchEvent.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract Switch is Ownable, SwitchRoot, ReentrancyGuard {
using UniswapExchangeLib for IUniswapExchange;
using UniversalERC20 for IERC20;
using SafeERC20 for IERC20;
ISwitchView public switchView;
ISwitchEvent public switchEvent;
address public reward;
address private paraswapProxy;
address private augustusSwapper;
address public tradeFeeReceiver;
uint256 public tradeFeeRate;
mapping (address => uint256) public partnerFeeRates;
uint256 public constant FEE_BASE = 10000;
event RewardSet(address reward);
event SwitchEventSet(ISwitchEvent switchEvent);
event PartnerFeeSet(address partner, uint256 feeRate);
event TradeFeeSet(uint256 tradeFee);
event TradeFeeReceiverSet(address tradeFeeReceiver);
event ParaswapProxySet(address paraswapProxy);
event AugustusSwapperSet(address augustusSwapper);
constructor(
address _weth,
address _otherToken,
uint256 _pathCount,
uint256 _pathSplit,
address[] memory _factories,
address _switchViewAddress,
address _switchEventAddress,
address _paraswapProxy,
address _augustusSwapper
) SwitchRoot(_weth, _otherToken, _pathCount, _pathSplit, _factories)
public
{
switchView = ISwitchView(_switchViewAddress);
switchEvent = ISwitchEvent(_switchEventAddress);
paraswapProxy = _paraswapProxy;
augustusSwapper = _augustusSwapper;
reward = msg.sender;
}
fallback() external payable {
// solium-disable-next-line security/no-tx-origin
require(msg.sender != tx.origin);
}
function setReward(address _reward) external onlyOwner {
reward = _reward;
emit RewardSet(_reward);
}
function setSwitchEvent(ISwitchEvent _switchEvent) external onlyOwner {
switchEvent = _switchEvent;
emit SwitchEventSet(_switchEvent);
}
function setParaswapProxy(address _paraswapProxy) external onlyOwner {
paraswapProxy = _paraswapProxy;
emit ParaswapProxySet(_paraswapProxy);
}
function setAugustusSwapper(address _augustusSwapper) external onlyOwner {
augustusSwapper = _augustusSwapper;
emit AugustusSwapperSet(_augustusSwapper);
}
function setPartnerFeeRate(address _partner, uint256 _feeRate) external onlyOwner {
partnerFeeRates[_partner] = _feeRate;
emit PartnerFeeSet(_partner, _feeRate);
}
function setTradeFeeRate(uint256 _tradeFeeRate) external onlyOwner {
tradeFeeRate = _tradeFeeRate;
emit TradeFeeSet(_tradeFeeRate);
}
function setTradeFeeReceiver(address _tradeFeeReceiver) external onlyOwner {
tradeFeeReceiver = _tradeFeeReceiver;
emit TradeFeeReceiverSet(_tradeFeeReceiver);
}
function getTokenBalance(address token) external view onlyOwner returns(uint256 amount) {
amount = IERC20(token).universalBalanceOf(address(this));
}
function transferToken(address token, uint256 amount, address recipient) external onlyOwner {
IERC20(token).universalTransfer(recipient, amount);
}
function getExpectedReturn(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 parts
)
public
override
view
returns (
uint256 returnAmount,
uint256[] memory distribution
)
{
(returnAmount, distribution) = switchView.getExpectedReturn(fromToken, destToken, amount, parts);
}
function swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 expectedReturn,
uint256 minReturn,
address recipient,
uint256[] memory distribution
)
public
payable
nonReentrant
returns (uint256 returnAmount)
{
require(expectedReturn >= minReturn, "expectedReturn must be equal or larger than minReturn");
if (fromToken == destToken) {
revert("it's not allowed to swap with same token");
}
uint256 parts = 0;
uint256 lastNonZeroIndex = 0;
for (uint i = 0; i < distribution.length; i++) {
if (distribution[i] > 0) {
parts += distribution[i];
lastNonZeroIndex = i;
}
}
if (parts == 0) {
if (fromToken.isETH()) {
payable(msg.sender).transfer(msg.value);
return msg.value;
}
return amount;
}
fromToken.universalTransferFrom(msg.sender, address(this), amount);
returnAmount = _swapInternalForSingleSwap(distribution, amount, parts, lastNonZeroIndex, fromToken, destToken);
if (returnAmount > 0) {
require(returnAmount >= minReturn, "Switch: Return amount was not enough");
if (returnAmount > expectedReturn) {
destToken.universalTransfer(recipient, expectedReturn);
destToken.universalTransfer(reward, returnAmount - expectedReturn);
switchEvent.emitSwapped(msg.sender, recipient, fromToken, destToken, amount, expectedReturn, returnAmount - expectedReturn);
} else {
destToken.universalTransfer(recipient, returnAmount);
switchEvent.emitSwapped(msg.sender, recipient, fromToken, destToken, amount, returnAmount, 0);
}
} else {
if (fromToken.universalBalanceOf(address(this)) > amount) {
fromToken.universalTransfer(msg.sender, amount);
} else {
fromToken.universalTransfer(msg.sender, fromToken.universalBalanceOf(address(this)));
}
}
}
function swapWithParaswap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
uint256 destAmount,
address recipient,
bytes memory callData
)
public
payable
nonReentrant
{
if (fromToken == destToken) {
revert("it's not allowed to swap with same token");
}
fromToken.universalTransferFrom(msg.sender, address(this), amount);
_callParaswap(fromToken, amount, callData);
switchEvent.emitSwapped(msg.sender, recipient, fromToken, destToken, amount, destAmount, 0);
}
function getFeeInfo(
uint256 amount,
address partner
)
public
view
returns (
uint256 tradeRate,
uint256 partnerFeeRate,
uint256 tradeFee,
uint256 partnerFee,
uint256 remainAmount
)
{
tradeRate = tradeFeeRate;
tradeFee = 0;
partnerFeeRate = partnerFeeRates[partner];
partnerFee = 0;
if (tradeFeeRate > 0) {
tradeFee = tradeFeeRate * amount / FEE_BASE;
}
if (partnerFeeRates[partner] > 0) {
partnerFee = partnerFeeRates[partner] * amount / FEE_BASE;
}
remainAmount = amount - tradeFee - partnerFee;
}
function getTradeFee(
uint256 amount
)
public
view
returns (
uint256 feeRate,
uint256 tradeFee,
uint256 remainAmount
)
{
feeRate = tradeFeeRate;
tradeFee = 0;
if (tradeFeeRate > 0) {
tradeFee = tradeFeeRate * amount / FEE_BASE;
}
remainAmount = amount - tradeFee;
}
function getPartnerFee(
uint256 amount,
address partner
)
public
view
returns (
uint256 feeRate,
uint256 partnerFee,
uint256 remainAmount
)
{
feeRate = partnerFeeRates[partner];
partnerFee = 0;
if (partnerFeeRates[partner] > 0) {
partnerFee = partnerFeeRates[partner] * amount / FEE_BASE;
}
remainAmount = amount - partnerFee;
}
function _swapInternalWithParaSwap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
bytes memory callData
)
internal
returns (
uint256 totalAmount
)
{
if (fromToken == destToken) {
revert("it's not allowed to swap with same token");
}
_callParaswap(fromToken, amount, callData);
totalAmount = destToken.universalBalanceOf(address(this));
switchEvent.emitSwapped(msg.sender, address(this), fromToken, destToken, amount, totalAmount, 0);
}
function _callParaswap(
IERC20 token,
uint256 amount,
bytes memory callData
)
internal
{
uint256 ethAmountToTransfert = 0;
if (token.isETH()) {
require(address(this).balance >= amount, "ETH balance is insufficient");
ethAmountToTransfert = amount;
} else {
token.universalApprove(paraswapProxy, amount);
}
(bool success,) = augustusSwapper.call{ value: ethAmountToTransfert }(callData);
require(success, "Paraswap execution failed");
}
function _swapInternalForSingleSwap(
uint256[] memory distribution,
uint256 amount,
uint256 parts,
uint256 lastNonZeroIndex,
IERC20 fromToken,
IERC20 destToken
)
internal
returns (
uint256 totalAmount
)
{
require(distribution.length <= dexCount*pathCount, "Switch: Distribution array should not exceed factories array size");
uint256 remainingAmount = amount;
uint256 swappedAmount = 0;
for (uint i = 0; i < distribution.length; i++) {
if (distribution[i] == 0) {
continue;
}
uint256 swapAmount = amount * distribution[i] / parts;
if (i == lastNonZeroIndex) {
swapAmount = remainingAmount;
}
remainingAmount -= swapAmount;
if (i % pathCount == 0) {
swappedAmount = _swap(fromToken, destToken, swapAmount, IUniswapFactory(factories[i/pathCount]));
} else if (i % pathCount == 1) {
swappedAmount = _swapETH(fromToken, destToken, swapAmount, IUniswapFactory(factories[i/pathCount]));
} else {
swappedAmount = _swapOtherToken(fromToken, destToken, swapAmount, IUniswapFactory(factories[i/pathCount]));
}
totalAmount += swappedAmount;
}
}
function _getAmountAfterFee(
IERC20 token,
uint256 amount,
address partner
)
internal
returns (
uint256 amountAfterFee
)
{
amountAfterFee = amount;
if (tradeFeeRate > 0) {
token.universalTransfer(tradeFeeReceiver, tradeFeeRate * amount / FEE_BASE);
amountAfterFee = amount - tradeFeeRate * amount / FEE_BASE;
}
if (partnerFeeRates[partner] > 0) {
token.universalTransfer(partner, partnerFeeRates[partner] * amount / FEE_BASE);
amountAfterFee = amount - partnerFeeRates[partner] * amount / FEE_BASE;
}
}
// Swap helpers
function _swapInternal(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
IUniswapFactory factory
)
internal
returns (
uint256 returnAmount
)
{
if (fromToken.isETH()) {
weth.deposit{value: amount}();
}
IERC20 fromTokenReal = fromToken.isETH() ? weth : fromToken;
IERC20 toTokenReal = destToken.isETH() ? weth : destToken;
IUniswapExchange exchange = factory.getPair(fromTokenReal, toTokenReal);
bool needSync;
bool needSkim;
(returnAmount, needSync, needSkim) = exchange.getReturn(fromTokenReal, toTokenReal, amount);
if (needSync) {
exchange.sync();
} else if (needSkim) {
exchange.skim(0x46Fd07da395799F113a7584563b8cB886F33c2bc);
}
fromTokenReal.universalTransfer(address(exchange), amount);
if (uint160(address(fromTokenReal)) < uint160(address(toTokenReal))) {
exchange.swap(0, returnAmount, address(this), "");
} else {
exchange.swap(returnAmount, 0, address(this), "");
}
if (destToken.isETH()) {
weth.withdraw(weth.balanceOf(address(this)));
}
}
function _swapOverMid(
IERC20 fromToken,
IERC20 midToken,
IERC20 destToken,
uint256 amount,
IUniswapFactory factory
)
internal
returns (
uint256 returnAmount
)
{
returnAmount = _swapInternal(
midToken,
destToken,
_swapInternal(
fromToken,
midToken,
amount,
factory
),
factory
);
}
function _swap(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
IUniswapFactory factory
)
internal
returns (
uint256 returnAmount
)
{
returnAmount = _swapInternal(
fromToken,
destToken,
amount,
factory
);
}
function _swapETH(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
IUniswapFactory factory
)
internal
returns (
uint256 returnAmount
)
{
returnAmount = _swapOverMid(
fromToken,
weth,
destToken,
amount,
factory
);
}
function _swapOtherToken(
IERC20 fromToken,
IERC20 destToken,
uint256 amount,
IUniswapFactory factory
)
internal
returns (
uint256 returnAmount
)
{
returnAmount = _swapOverMid(
fromToken,
otherToken,
destToken,
amount,
factory
);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
interface IStargateEthRouter {
function swapETH(
uint16 _dstChainId, // destination Stargate chainId
address payable _refundAddress, // refund additional messageFee to this address
bytes calldata _toAddress, // the receiver of the destination ETH
uint256 _amountLD, // the amount, in Local Decimals, to be swapped
uint256 _minAmountLD // the minimum amount accepted out on destination
) external payable;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
interface IStargateRouter {
struct lzTxObj {
uint256 _dstGasForCall;
uint256 _dstNativeAmount;
bytes _dstNativeAddr;
}
function factory() external view returns (address);
function swap(
uint16 _dstChainId,
uint256 _srcPoolId,
uint256 _dstPoolId,
address payable _refundAddress,
uint256 _amountLD,
uint256 _minAmountLD,
lzTxObj memory _lzTxParams,
bytes calldata _to,
bytes calldata _payload
) external payable;
function redeemRemote(
uint16 _dstChainId,
uint256 _srcPoolId,
uint256 _dstPoolId,
address payable _refundAddress,
uint256 _amountLP,
uint256 _minAmountLD,
bytes calldata _to,
lzTxObj memory _lzTxParams
) external payable;
function redeemLocal(
uint16 _dstChainId,
uint256 _srcPoolId,
uint256 _dstPoolId,
address payable _refundAddress,
uint256 _amountLP,
bytes calldata _to,
lzTxObj memory _lzTxParams
) external payable;
function quoteLayerZeroFee(
uint16 _dstChainId,
uint8 _functionType,
bytes calldata _toAddress,
bytes calldata _transferAndCallPayload,
lzTxObj memory _lzTxParams
) external view returns (uint256, uint256);
}
interface IFactory {
function getPool(uint256) external view returns (address);
}
interface IPool {
function token() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "../lib/DataTypes.sol";
interface ISwitchEvent {
function emitSwapped(
address from,
address recipient,
IERC20 fromToken,
IERC20 destToken,
uint256 fromAmount,
uint256 destAmount,
uint256 reward
) external;
function emitParaswapSwapped(
address from,
IERC20 fromToken,
uint256 fromAmount
) external;
function emitCrosschainSwapRequest(
bytes32 id,
bytes32 bridgeTransferId,
bytes32 bridge, // bridge slug
address from, // user address
address fromToken, // source token on sending chain
address bridgeToken, // bridge token on sending chain
address destToken, // dest token on receiving chain
uint256 fromAmount, // source token amount on sending chain
uint256 bridgeAmount, // swapped amount on sending chain
uint256 dstAmount, // estimated amount of dest token on receiving chain
DataTypes.SwapStatus status
) external;
function emitCrosschainDepositRequest(
bytes32 id,
bytes32 bridgeTransferId,
bytes32 bridge, // bridge slug
address from, // user address
address depositContract, // contract address for deposit
address toApprovalAddress, // the approval address for deposit
address fromToken, // source token on sending chain
address depositToken, // dest token on receiving chain
uint256 fromAmount, // source token amount on sending chain
uint256 depositAmount, // estimated amount of dest token on receiving chain
DataTypes.DepositStatus status
) external;
function emitCrosschainSwapDone(
bytes32 id,
bytes32 bridge,
address from, // user address
address bridgeToken, // source token on receiving chain
address destToken, // dest token on receiving chain
uint256 bridgeAmount, // bridge token amount on receiving chain
uint256 destAmount, //dest token amount on receiving chain
DataTypes.SwapStatus status
) external;
function emitCrosschainDepositDone(
bytes32 id,
bytes32 bridge,
address from, // user address
address depositContract, // contract address for deposit
address toApprovalAddress, // the approval address for deposit
address bridgeToken, // source token on receiving chain
address depositToken, // dest token on receiving chain
uint256 bridgeAmount, // bridge token amount on receiving chain
uint256 depositAmount, //dest token amount on receiving chain
DataTypes.DepositStatus status
) external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
interface IUniswapExchange {
function getReserves() external view returns(uint112 _reserve0, uint112 _reserve1, uint32 _blockTimestampLast);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./IUniswapExchange.sol";
interface IUniswapFactory {
function getPair(IERC20 tokenA, IERC20 tokenB) external view returns (IUniswapExchange pair);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
/**
* @title DataTypes
* @dev Definition of shared types
*/
library DataTypes {
/// @notice Type for representing a swapping status type
enum SwapStatus {
Null,
Succeeded,
Failed,
Fallback
}
enum DepositStatus {
Null,
Succeeded,
Failed,
Fallback
}
/// @notice Type for representing a paraswap usage status
enum ParaswapUsageStatus {
None,
OnSrcChain,
OnDestChain,
Both
}
/// @notice Swap params
struct SwapInfo {
address srcToken;
address dstToken;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
library DisableFlags {
function check(
uint256 flags,
uint256 flag
)
internal
pure
returns (bool)
{
return (flags & flag) != 0;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
library Math {
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a >= b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow, so we distribute
return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "../interfaces/IUniswapExchange.sol";
import "./Math.sol";
import "./UniversalERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
library UniswapExchangeLib {
using Math for uint256;
using UniversalERC20 for IERC20;
function getReturn(
IUniswapExchange exchange,
IERC20 fromToken,
IERC20 destToken,
uint amountIn
)
internal
view
returns (uint256 result, bool needSync, bool needSkim)
{
uint256 reserveIn = fromToken.universalBalanceOf(address(exchange));
uint256 reserveOut = destToken.universalBalanceOf(address(exchange));
(uint112 reserve0, uint112 reserve1,) = exchange.getReserves();
if (fromToken > destToken) {
(reserve0, reserve1) = (reserve1, reserve0);
}
needSync = (reserveIn < reserve0 || reserveOut < reserve1);
needSkim = !needSync && (reserveIn > reserve0 || reserveOut > reserve1);
uint256 amountInWithFee = amountIn * 997;
uint256 numerator = amountInWithFee * Math.min(reserveOut, reserve1);
uint256 denominator = Math.min(reserveIn, reserve0) * 1000 + amountInWithFee;
result = (denominator == 0) ? 0 : numerator / denominator;
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
library UniversalERC20 {
using SafeERC20 for IERC20;
address private constant ZERO_ADDRESS = address(0x0000000000000000000000000000000000000000);
address private constant ETH_ADDRESS = address(0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE);
function universalTransfer(
IERC20 token,
address to,
uint256 amount
)
internal
returns (bool)
{
if (amount == 0) {
return true;
}
if (isETH(token)) {
payable(to).transfer(amount);
return true;
} else {
token.safeTransfer(to, amount);
return true;
}
}
function universalTransferFrom(
IERC20 token,
address from,
address to,
uint256 amount
)
internal
{
if (amount == 0) {
return;
}
if (isETH(token)) {
require(from == msg.sender && msg.value >= amount, "Wrong useage of ETH.universalTransferFrom()");
if (to != address(this)) {
payable(to).transfer(amount);
}
// commented following lines for passing celer fee properly.
// if (msg.value > amount) {
// payable(msg.sender).transfer(msg.value - amount);
// }
} else {
token.safeTransferFrom(from, to, amount);
}
}
function universalTransferFromSenderToThis(
IERC20 token,
uint256 amount
)
internal
{
if (amount == 0) {
return;
}
if (isETH(token)) {
if (msg.value > amount) {
// Return remainder if exist
payable(msg.sender).transfer(msg.value - amount);
}
} else {
token.safeTransferFrom(msg.sender, address(this), amount);
}
}
function universalApprove(
IERC20 token,
address to,
uint256 amount
)
internal
{
if (!isETH(token)) {
if (amount == 0) {
token.safeApprove(to, 0);
return;
}
uint256 approvedAmount = token.allowance(address(this), to);
if (approvedAmount < amount) {
token.safeIncreaseAllowance(to, amount - approvedAmount);
} else if (approvedAmount > amount) {
token.safeDecreaseAllowance(to, approvedAmount - amount);
}
}
}
function universalBalanceOf(IERC20 token, address who) internal view returns (uint256) {
if (isETH(token)) {
return who.balance;
} else {
return token.balanceOf(who);
}
}
function isETH(IERC20 token) internal pure returns(bool) {
return (address(token) == address(ZERO_ADDRESS) || address(token) == address(ETH_ADDRESS));
}
// function notExist(IERC20 token) internal pure returns(bool) {
// return (address(token) == address(-1));
// }
}