Contract Name:
AITradingAssistant
Contract Source Code:
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {Context} from "../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.
*
* The initial owner is set to the address provided by the deployer. 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;
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
constructor(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @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 {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @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 {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_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 v5.1.0) (interfaces/IERC1363.sol)
pragma solidity ^0.8.20;
import {IERC20} from "./IERC20.sol";
import {IERC165} from "./IERC165.sol";
/**
* @title IERC1363
* @dev Interface of the ERC-1363 standard as defined in the https://eips.ethereum.org/EIPS/eip-1363[ERC-1363].
*
* Defines an extension interface for ERC-20 tokens that supports executing code on a recipient contract
* after `transfer` or `transferFrom`, or code on a spender contract after `approve`, in a single transaction.
*/
interface IERC1363 is IERC20, IERC165 {
/*
* Note: the ERC-165 identifier for this interface is 0xb0202a11.
* 0xb0202a11 ===
* bytes4(keccak256('transferAndCall(address,uint256)')) ^
* bytes4(keccak256('transferAndCall(address,uint256,bytes)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256)')) ^
* bytes4(keccak256('transferFromAndCall(address,address,uint256,bytes)')) ^
* bytes4(keccak256('approveAndCall(address,uint256)')) ^
* bytes4(keccak256('approveAndCall(address,uint256,bytes)'))
*/
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferAndCall(address to, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @param data Additional data with no specified format, sent in call to `to`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferAndCall(address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param from The address which you want to send tokens from.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferFromAndCall(address from, address to, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the allowance mechanism
* and then calls {IERC1363Receiver-onTransferReceived} on `to`.
* @param from The address which you want to send tokens from.
* @param to The address which you want to transfer to.
* @param value The amount of tokens to be transferred.
* @param data Additional data with no specified format, sent in call to `to`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function transferFromAndCall(address from, address to, uint256 value, bytes calldata data) external returns (bool);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function approveAndCall(address spender, uint256 value) external returns (bool);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens and then calls {IERC1363Spender-onApprovalReceived} on `spender`.
* @param spender The address which will spend the funds.
* @param value The amount of tokens to be spent.
* @param data Additional data with no specified format, sent in call to `spender`.
* @return A boolean value indicating whether the operation succeeded unless throwing.
*/
function approveAndCall(address spender, uint256 value, bytes calldata data) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC165.sol)
pragma solidity ^0.8.20;
import {IERC165} from "../utils/introspection/IERC165.sol";
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC20.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../token/ERC20/IERC20.sol";
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC-20 standard as defined in the ERC.
*/
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 value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens 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 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` 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 value) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.2.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../IERC20.sol";
import {IERC1363} from "../../../interfaces/IERC1363.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC-20 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 {
/**
* @dev An operation with an ERC-20 token failed.
*/
error SafeERC20FailedOperation(address token);
/**
* @dev Indicates a failed `decreaseAllowance` request.
*/
error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);
/**
* @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.encodeCall(token.transfer, (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.encodeCall(token.transferFrom, (from, to, 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.
*
* IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
* smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
* this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
* that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
forceApprove(token, spender, oldAllowance + value);
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
* value, non-reverting calls are assumed to be successful.
*
* IMPORTANT: If the token implements ERC-7674 (ERC-20 with temporary allowance), and if the "client"
* smart contract uses ERC-7674 to set temporary allowances, then the "client" smart contract should avoid using
* this function. Performing a {safeIncreaseAllowance} or {safeDecreaseAllowance} operation on a token contract
* that has a non-zero temporary allowance (for that particular owner-spender) will result in unexpected behavior.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
unchecked {
uint256 currentAllowance = token.allowance(address(this), spender);
if (currentAllowance < requestedDecrease) {
revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
}
forceApprove(token, spender, currentAllowance - requestedDecrease);
}
}
/**
* @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.
*
* NOTE: If the token implements ERC-7674, this function will not modify any temporary allowance. This function
* only sets the "standard" allowance. Any temporary allowance will remain active, in addition to the value being
* set here.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Performs an {ERC1363} transferAndCall, with a fallback to the simple {ERC20} transfer if the target has no
* code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* Reverts if the returned value is other than `true`.
*/
function transferAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
if (to.code.length == 0) {
safeTransfer(token, to, value);
} else if (!token.transferAndCall(to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Performs an {ERC1363} transferFromAndCall, with a fallback to the simple {ERC20} transferFrom if the target
* has no code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* Reverts if the returned value is other than `true`.
*/
function transferFromAndCallRelaxed(
IERC1363 token,
address from,
address to,
uint256 value,
bytes memory data
) internal {
if (to.code.length == 0) {
safeTransferFrom(token, from, to, value);
} else if (!token.transferFromAndCall(from, to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Performs an {ERC1363} approveAndCall, with a fallback to the simple {ERC20} approve if the target has no
* code. This can be used to implement an {ERC721}-like safe transfer that rely on {ERC1363} checks when
* targeting contracts.
*
* NOTE: When the recipient address (`to`) has no code (i.e. is an EOA), this function behaves as {forceApprove}.
* Opposedly, when the recipient address (`to`) has code, this function only attempts to call {ERC1363-approveAndCall}
* once without retrying, and relies on the returned value to be true.
*
* Reverts if the returned value is other than `true`.
*/
function approveAndCallRelaxed(IERC1363 token, address to, uint256 value, bytes memory data) internal {
if (to.code.length == 0) {
forceApprove(token, to, value);
} else if (!token.approveAndCall(to, value, data)) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @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 {_callOptionalReturnBool} that reverts if call fails to meet the requirements.
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
uint256 returnSize;
uint256 returnValue;
assembly ("memory-safe") {
let success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
// bubble errors
if iszero(success) {
let ptr := mload(0x40)
returndatacopy(ptr, 0, returndatasize())
revert(ptr, returndatasize())
}
returnSize := returndatasize()
returnValue := mload(0)
}
if (returnSize == 0 ? address(token).code.length == 0 : returnValue != 1) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @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 silently catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
bool success;
uint256 returnSize;
uint256 returnValue;
assembly ("memory-safe") {
success := call(gas(), token, 0, add(data, 0x20), mload(data), 0, 0x20)
returnSize := returndatasize()
returnValue := mload(0)
}
return success && (returnSize == 0 ? address(token).code.length > 0 : returnValue == 1);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @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;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/introspection/IERC165.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC-165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[ERC].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (utils/ReentrancyGuard.sol)
pragma solidity ^0.8.20;
/**
* @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 EIP-1153 (transient storage) is available on the chain you're deploying at,
* consider using {ReentrancyGuardTransient} instead.
*
* 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;
/**
* @dev Unauthorized reentrant call.
*/
error ReentrancyGuardReentrantCall();
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
if (_status == ENTERED) {
revert ReentrancyGuardReentrantCall();
}
// 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
pragma solidity ^0.8.28;
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
interface IWETH {
function deposit() external payable;
function depositFor(address account) external payable returns (bool);
function withdraw(uint256) external;
function withdrawTo(address account, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
}
contract AITradingAssistant is Ownable, ReentrancyGuard {
using SafeERC20 for IERC20;
address public immutable WETH;
address public orderExecutor;
constructor(
address initialOwner,
address _weth,
address initialExecutor
) Ownable(initialOwner) {
WETH = _weth;
orderExecutor = initialExecutor;
}
modifier onlyExecutorOrOwner() {
require(msg.sender == owner() || msg.sender == orderExecutor, "Not authorized");
_;
}
struct OrderDetails {
bytes32 orderId;
address tokenIn;
address tokenOut;
uint256 amountIn;
uint256 amountOutMin;
}
struct LimitOrder {
address user;
address tokenIn;
address tokenOut;
uint256 amountIn;
uint256 amountOutMin;
}
// State variables
mapping(address => mapping(address => uint256)) public userBalances; // user => token => amount
mapping(bytes32 => LimitOrder) public limitOrders;
bytes32[] public activeOrderIds;
// Events
event Received(address user, uint256 amount);
event TokenReceived(address user, address token, uint256 amount);
event Deposited(address user, address token, uint256 amount);
event Withdrawn(address user, address token, uint256 amount);
event LimitOrderCreated(
bytes32 indexed orderId,
address user,
address tokenIn,
address tokenOut,
uint256 amountIn,
uint256 amountOutMin
);
event LimitOrderCancelled(bytes32 indexed orderId);
event LimitOrderExecuted(
bytes32 indexed orderId,
address user,
address tokenIn,
address tokenOut,
uint256 amountIn,
uint256 amountOut
);
event SwapExecuted(
address user,
address tokenIn,
address tokenOut,
uint256 amountIn,
uint256 amountOut
);
event WalletSwapExecuted(
address user,
address tokenIn,
address tokenOut,
uint256 amountIn,
uint256 amountOut
);
receive() external payable {
IWETH(WETH).deposit{value: msg.value}();
userBalances[msg.sender][WETH] += msg.value;
emit Received(msg.sender, msg.value);
}
function setOrderExecutor(address newExecutor) external onlyOwner {
require(newExecutor != address(0), "Invalid executor address");
orderExecutor = newExecutor;
}
function depositToken(
address token,
uint256 amount,
address user
) external nonReentrant {
require(token != address(0), "Invalid token address");
require(amount > 0, "Amount must be greater than 0");
IERC20(token).safeTransferFrom(msg.sender, address(this), amount);
userBalances[user][token] += amount;
emit TokenReceived(user, token, amount);
}
function depositFor(
address user,
address token,
uint256 amount
) external onlyOwner nonReentrant {
require(token != address(0), "Invalid token address");
userBalances[user][token] += amount;
emit Deposited(user, token, amount);
}
function createLimitOrder(
address user,
address tokenIn,
address tokenOut,
uint256 amountIn,
uint256 amountOutMin
) external onlyOwner returns (bytes32) {
require(userBalances[user][tokenIn] >= amountIn, "Insufficient balance");
bytes32 orderId = keccak256(
abi.encodePacked(
user,
tokenIn,
tokenOut,
amountIn,
amountOutMin,
block.timestamp
)
);
require(limitOrders[orderId].amountIn == 0, "Order ID collision");
limitOrders[orderId] = LimitOrder({
user: user,
tokenIn: tokenIn,
tokenOut: tokenOut,
amountIn: amountIn,
amountOutMin: amountOutMin
});
activeOrderIds.push(orderId);
userBalances[user][tokenIn] -= amountIn;
emit LimitOrderCreated(
orderId,
user,
tokenIn,
tokenOut,
amountIn,
amountOutMin
);
return orderId;
}
function cancelLimitOrder(bytes32 orderId) public {
LimitOrder memory order = limitOrders[orderId];
require(order.user != address(0), "Order does not exist");
require(
msg.sender == owner() || msg.sender == order.user,
"Unauthorized"
);
userBalances[order.user][order.tokenIn] += order.amountIn;
for (uint i = 0; i < activeOrderIds.length; i++) {
if (activeOrderIds[i] == orderId) {
activeOrderIds[i] = activeOrderIds[activeOrderIds.length - 1];
activeOrderIds.pop();
break;
}
}
delete limitOrders[orderId];
emit LimitOrderCancelled(orderId);
}
function executeLimitOrder(
bytes32 orderId,
address router,
bytes calldata swapData
) external onlyExecutorOrOwner nonReentrant {
LimitOrder memory order = limitOrders[orderId];
require(order.user != address(0), "Order does not exist");
uint256 balanceBefore = IERC20(order.tokenOut).balanceOf(address(this));
IERC20(order.tokenIn).approve(router, order.amountIn);
(bool success, ) = router.call(swapData);
require(success, "Swap failed");
uint256 balanceAfter = IERC20(order.tokenOut).balanceOf(address(this));
uint256 amountOut = balanceAfter - balanceBefore;
require(amountOut >= order.amountOutMin, "Insufficient output amount");
userBalances[order.user][order.tokenOut] += amountOut;
for (uint i = 0; i < activeOrderIds.length; i++) {
if (activeOrderIds[i] == orderId) {
activeOrderIds[i] = activeOrderIds[activeOrderIds.length - 1];
activeOrderIds.pop();
break;
}
}
delete limitOrders[orderId];
emit LimitOrderExecuted(
orderId,
order.user,
order.tokenIn,
order.tokenOut,
order.amountIn,
amountOut
);
}
function executeSwap(
address user,
address tokenIn,
address tokenOut,
uint256 amountIn,
address router,
bytes calldata swapData
) external onlyOwner nonReentrant {
require(userBalances[user][tokenIn] >= amountIn, "Insufficient balance");
userBalances[user][tokenIn] -= amountIn;
uint256 balanceBefore = IERC20(tokenOut).balanceOf(address(this));
IERC20(tokenIn).approve(router, amountIn);
(bool success, ) = router.call(swapData);
require(success, "Swap failed");
uint256 balanceAfter = IERC20(tokenOut).balanceOf(address(this));
uint256 amountOut = balanceAfter - balanceBefore;
userBalances[user][tokenOut] += amountOut;
emit SwapExecuted(
user,
tokenIn,
tokenOut,
amountIn,
amountOut
);
}
function executeWalletSwap(
address user,
address tokenIn,
address tokenOut,
uint256 amountIn,
uint256 amountOutMin,
address router,
bytes calldata swapData
) external onlyOwner nonReentrant {
IERC20(tokenIn).safeTransferFrom(user, address(this), amountIn);
uint256 balanceBefore = IERC20(tokenOut).balanceOf(address(this));
IERC20(tokenIn).approve(router, amountIn);
(bool success, ) = router.call(swapData);
require(success, "Swap failed");
uint256 balanceAfter = IERC20(tokenOut).balanceOf(address(this));
uint256 amountOut = balanceAfter - balanceBefore;
require(amountOut >= amountOutMin, "Insufficient output amount");
if (tokenOut == WETH) {
bool unwrapSuccess = IWETH(WETH).withdrawTo(user, amountOut);
require(unwrapSuccess, "wS unwrap failed");
} else {
IERC20(tokenOut).safeTransfer(user, amountOut);
}
emit WalletSwapExecuted(
user,
tokenIn,
tokenOut,
amountIn,
amountOut
);
}
function withdraw(
address user,
address token,
uint256 amount
) external onlyOwner nonReentrant {
require(userBalances[user][token] >= amount, "Insufficient balance");
userBalances[user][token] -= amount;
for (uint i = 0; i < activeOrderIds.length; i++) {
LimitOrder storage order = limitOrders[activeOrderIds[i]];
if (order.user == user && order.tokenIn == token) {
cancelLimitOrder(activeOrderIds[i]);
}
}
if (token == WETH) {
bool success = IWETH(WETH).withdrawTo(user, amount);
require(success, "WETH withdrawal failed");
} else {
IERC20(token).safeTransfer(user, amount);
}
emit Withdrawn(user, token, amount);
}
function userEmergencyWithdraw(address token) external nonReentrant {
uint256 balance = userBalances[msg.sender][token];
require(balance > 0, "No balance to withdraw");
userBalances[msg.sender][token] = 0;
for (uint i = 0; i < activeOrderIds.length; i++) {
LimitOrder storage order = limitOrders[activeOrderIds[i]];
if (order.user == msg.sender && order.tokenIn == token) {
cancelLimitOrder(activeOrderIds[i]);
}
}
if (token == WETH) {
IWETH(WETH).withdraw(balance);
(bool success, ) = msg.sender.call{value: balance}("");
require(success, "ETH transfer failed");
} else {
IERC20(token).safeTransfer(msg.sender, balance);
}
emit Withdrawn(msg.sender, token, balance);
}
function emergencyWithdraw(address token) external onlyOwner {
if (token == WETH) {
uint256 balance = address(this).balance;
IWETH(WETH).withdraw(balance);
(bool success, ) = owner().call{value: balance}("");
require(success, "ETH transfer failed");
} else {
IERC20(token).safeTransfer(
owner(),
IERC20(token).balanceOf(address(this))
);
}
}
function getUserBalance(address user, address token) external view returns (uint256) {
return userBalances[user][token];
}
function getTotalActiveOrders() external view returns (uint256) {
return activeOrderIds.length;
}
function getActiveOrders(uint256 offset, uint256 limit)
external
view
returns (OrderDetails[] memory orders, uint256 total)
{
uint256 totalCount = activeOrderIds.length;
uint256 size = limit;
if (offset + limit > totalCount) {
size = totalCount > offset ? totalCount - offset : 0;
}
OrderDetails[] memory result = new OrderDetails[](size);
for (uint256 i = 0; i < size; i++) {
uint256 orderIndex = offset + i;
bytes32 orderId = activeOrderIds[orderIndex];
LimitOrder memory order = limitOrders[orderId];
result[i] = OrderDetails({
orderId: orderId,
tokenIn: order.tokenIn,
tokenOut: order.tokenOut,
amountIn: order.amountIn,
amountOutMin: order.amountOutMin
});
}
return (result, totalCount);
}
}