Contract Name:
SwitchHyphen
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling 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 v4.9.0) (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;
}
/**
* @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a
* `nonReentrant` function in the call stack.
*/
function _reentrancyGuardEntered() internal view returns (bool) {
return _status == _ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/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 v4.9.0) (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 v4.9.3) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/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;
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
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));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
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");
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
* to be set to zero before setting it to a non-zero value, such as USDT.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
* Revert on invalid signature.
*/
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");
require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation 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).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
// 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 cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return
success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [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://consensys.net/diligence/blog/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/v0.8.0/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 { IHyphenRouter } from "../interfaces/IHyphenRouter.sol";
import "../lib/DataTypes.sol";
import "../core/BaseTrade.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
contract SwitchHyphen is BaseTrade, ReentrancyGuard {
using UniversalERC20 for IERC20;
using SafeERC20 for IERC20;
address public hyphenRouter;
struct TransferArgsHyphen {
address fromToken;
address destToken;
address payable recipient;
address partner;
uint256 partnerFeeRate;
uint256 amount;
uint256 estimatedDstTokenAmount;
uint64 dstChainId;
bytes32 id;
bytes32 bridge;
}
event HyphenRouterSet(address hyphenRouter);
constructor(
address _switchEventAddress,
address _feeCollector,
address _hyphenRouter
) BaseTrade(_switchEventAddress, _feeCollector)
public
{
hyphenRouter = _hyphenRouter;
}
function setHyphenRouter(address _hyphenRouter) external onlyOwner {
hyphenRouter = _hyphenRouter;
emit HyphenRouterSet(_hyphenRouter);
}
function transferByHyphen(
TransferArgsHyphen calldata transferArgs
)
external
payable
nonReentrant
{
require(transferArgs.amount > 0, "The amount must be greater than zero");
require(block.chainid != transferArgs.dstChainId, "Cannot bridge to same network");
IERC20(transferArgs.fromToken).universalTransferFrom(msg.sender, address(this), transferArgs.amount);
uint256 amountAfterFee = _getAmountAfterFee(IERC20(transferArgs.fromToken), transferArgs.amount, transferArgs.partner, transferArgs.partnerFeeRate);
bool isNative = IERC20(transferArgs.fromToken).isETH();
if (isNative) {
IHyphenRouter(hyphenRouter).depositNative{ value: amountAfterFee }(
transferArgs.recipient,
transferArgs.dstChainId,
"SWING"
);
} else {
// Give Hyphen bridge approval
IERC20(transferArgs.fromToken).safeApprove(hyphenRouter, 0);
IERC20(transferArgs.fromToken).safeApprove(hyphenRouter, amountAfterFee);
IHyphenRouter(hyphenRouter).depositErc20(
transferArgs.dstChainId,
transferArgs.fromToken,
transferArgs.recipient,
amountAfterFee,
"SWING"
);
}
_emitCrossChainTransferRequest(transferArgs, bytes32(0), amountAfterFee, msg.sender, DataTypes.SwapStatus.Succeeded);
}
function _emitCrossChainTransferRequest(TransferArgsHyphen 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.estimatedDstTokenAmount,
status
);
}
}
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "../lib/UniversalERC20.sol";
import "../interfaces/ISwitchEvent.sol";
import "../interfaces/IFeeCollector.sol";
contract BaseTrade is Ownable {
using UniversalERC20 for IERC20;
using SafeERC20 for IERC20;
ISwitchEvent public switchEvent;
address public feeCollector;
uint256 public maxPartnerFeeRate = 1000; // max partner fee rate is 10%
uint256 public defaultSwingCut = 1500; // swing takes a cut of 15% from partner fee by default
uint256 public constant FEE_BASE = 10000;
event MaxPartnerFeeRateSet(uint256 maxPartnerFeeRate);
event SwingCutSet(uint256 swingCut);
event PartnerFeeSet(address partner, uint256 feeRate);
event SwitchEventSet(ISwitchEvent switchEvent);
event DefaultSwingCutSet(uint256 defaultSwingCut);
constructor(
address _switchEventAddress,
address _feeCollector
)
public
{
switchEvent = ISwitchEvent(_switchEventAddress);
feeCollector = _feeCollector;
}
function setMaxPartnerFeeRate(uint256 _maxPartnerFeeRate) external onlyOwner {
require(_maxPartnerFeeRate <= 5000, "too large");
maxPartnerFeeRate = _maxPartnerFeeRate;
emit MaxPartnerFeeRateSet(_maxPartnerFeeRate);
}
function setSwitchEvent(ISwitchEvent _switchEvent) external onlyOwner {
switchEvent = _switchEvent;
emit SwitchEventSet(_switchEvent);
}
function setSwingCut(uint256 _defaultSwingCut) external onlyOwner {
defaultSwingCut = _defaultSwingCut;
emit DefaultSwingCutSet(_defaultSwingCut);
}
function getFeeInfo(
uint256 amount,
address partner,
uint256 partnerFeeRate
)
public
view
returns (
uint256 partnerFee,
uint256 remainAmount
)
{
partnerFee = partnerFeeRate * amount / FEE_BASE;
remainAmount = amount - partnerFee;
}
function _getAmountAfterFee(
IERC20 token,
uint256 amount,
address partner,
uint256 partnerFeeRate
)
internal
returns (
uint256 amountAfterFee
)
{
require(partnerFeeRate <= maxPartnerFeeRate, "partnerFeeRate too large");
amountAfterFee = amount;
if (partnerFeeRate > 0) {
uint256 swingCut = IFeeCollector(feeCollector).getPartnerSwingCut(partner) == 0 ? defaultSwingCut : IFeeCollector(feeCollector).getPartnerSwingCut(partner);
uint256 swingFee = partnerFeeRate * amount * swingCut / (FEE_BASE * FEE_BASE);
uint256 partnerFee = partnerFeeRate * amount / FEE_BASE - swingFee;
if (token.isETH()) {
IFeeCollector(feeCollector).collectTokenFees{ value: partnerFee + swingFee }(
address(token),
partnerFee,
swingFee,
partner
);
} else {
token.safeApprove(feeCollector, 0);
token.safeApprove(feeCollector, partnerFee + swingFee);
IFeeCollector(feeCollector).collectTokenFees(address(token), partnerFee, swingFee, partner);
}
amountAfterFee = amount - partnerFeeRate * amount / FEE_BASE;
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
interface IFeeCollector {
function collectTokenFees(
address tokenAddress,
uint256 partnerFee,
uint256 swingFee,
address partnerAddress
) payable external;
function getPartnerSwingCut(address partnerAddress) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.9;
// https://github.com/bcnmy/hyphen-contract/blob/master/contracts/hyphen/LiquidityPool.sol
interface IHyphenRouter {
function depositErc20(
uint256 toChainId,
address tokenAddress,
address receiver,
uint256 amount,
string calldata tag
) external;
function depositNative(
address receiver,
uint256 toChainId,
string calldata tag
) external payable;
}
// 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 emitCrosschainContractCallRequest(
bytes32 id,
bytes32 bridgeTransferId,
bytes32 bridge, // bridge slug
address from, // user address
address toContractAddress, // The address of the contract to interact with
address toApprovalAddress, // the approval address for contract call
address fromToken, // source token on sending chain
address callToken, // contract call token on receiving chain
uint256 fromAmount, // source token amount on sending chain
uint256 estimatedCallAmount, // estimated amount of contract call token on receiving chain
DataTypes.ContractCallStatus 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 emitCrosschainContractCallDone(
bytes32 id,
bytes32 bridge,
address from, // user address
address toContractAddress, // The address of the contract to interact with
address toApprovalAddress, // the approval address for contract call
address bridgeToken, // source token on receiving chain
address callToken, // call token on receiving chain
uint256 bridgeAmount, // bridge token amount on receiving chain
uint256 estimatedCallAmount, //dest token amount on receiving chain
DataTypes.ContractCallStatus status
) external;
function emitSingleChainContractCallDone(
address from, // user address
address toContractAddress, // The address of the contract to interact with
address toApprovalAddress, // the approval address for contract call
address fromToken, // source token on receiving chain
address callToken, // call token on receiving chain
uint256 fromAmount, // from token amount on receiving chain
uint256 callAmount, //dest token amount on receiving chain
DataTypes.ContractCallStatus status
) external;
}
// 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 ContractCallStatus {
Null,
Succeeded,
Failed,
Fallback
}
/// @notice Type for representing a paraswap usage status
enum ParaswapUsageStatus {
None,
OnSrcChain,
OnDestChain,
Both
}
/// @notice Split Swap params
struct SplitSwapInfo {
uint256 amount;
address swapContract;
address spender;
bytes swapData;
}
/// @notice Swap params
struct SwapInfo {
address srcToken;
address dstToken;
}
struct ContractCallInfo {
address toContractAddress; // The address of the contract to interact with.
address toApprovalAddress; // the approval address for contract call
address contractOutputsToken; // Some contract interactions will output a token (e.g. staking)
uint32 toContractGasLimit; // The estimated gas used by the destination call.
bytes toContractCallData; // The callData to be sent to the contract for the interaction on the destination chain.
}
struct ContractCallRequest {
bytes32 id;
bytes32 bridge;
address srcToken;
address bridgeToken;
address callToken;
address recipient;
uint256 srcAmount;
uint256 bridgeDstAmount;
uint256 estimatedCallAmount;
uint256[] dstDistribution;
bytes dstParaswapData;
ContractCallInfo callInfo;
ParaswapUsageStatus paraswapUsageStatus;
}
}
// 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 > 0) {
token.safeApprove(to, 0);
}
token.safeApprove(to, 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));
// }
}