POL Price: $0.612645 (+1.56%)
Gas: 50 GWei
 

Overview

POL Balance

Polygon PoS Chain LogoPolygon PoS Chain LogoPolygon PoS Chain Logo45.860963689640600248 POL

POL Value

$28.10 (@ $0.61/POL)

Token Holdings

Multichain Info

Transaction Hash
Method
Block
From
To
Swap649852452024-12-02 7:55:5516 mins ago1733126155IN
Krystal: Router
1 POL0.0075512343.00714122
Swap649850002024-12-02 7:47:1525 mins ago1733125635IN
Krystal: Router
2 POL0.0147373256.36507333
Swap649849592024-12-02 7:45:4726 mins ago1733125547IN
Krystal: Router
2 POL0.009506854.14486003
Swap649848992024-12-02 7:43:4128 mins ago1733125421IN
Krystal: Router
2 POL0.0185320670.86884958
Swap649848642024-12-02 7:42:2730 mins ago1733125347IN
Krystal: Router
2 POL0.011764667.00386119
Swap649847772024-12-02 7:39:0433 mins ago1733125144IN
Krystal: Router
6 POL0.03035725116.10580889
Swap649847272024-12-02 7:37:0235 mins ago1733125022IN
Krystal: Router
5 POL0.0117834467.11115398
Swap649846922024-12-02 7:35:4836 mins ago1733124948IN
Krystal: Router
4 POL0.0150475257.55411448
Swap649846922024-12-02 7:35:4836 mins ago1733124948IN
Krystal: Router
1 POL0.0101498257.80710781
Swap649846532024-12-02 7:34:2438 mins ago1733124864IN
Krystal: Router
1 POL0.0130085749.75091254
Swap649845882024-12-02 7:32:0640 mins ago1733124726IN
Krystal: Router
1 POL0.0151364957.88910798
Swap649844882024-12-02 7:28:0244 mins ago1733124482IN
Krystal: Router
1 POL0.0077717944.26328969
Swap649844452024-12-02 7:26:3046 mins ago1733124390IN
Krystal: Router
1 POL0.0085149448.495838
Swap649818962024-12-02 5:53:432 hrs ago1733118823IN
Krystal: Router
0.9 POL0.0074442.37362524
Swap649818432024-12-02 5:51:512 hrs ago1733118711IN
Krystal: Router
0.8 POL0.0069588439.63325791
Swap649817452024-12-02 5:48:232 hrs ago1733118503IN
Krystal: Router
0.9 POL0.0082225646.83379443
Swap649806232024-12-02 5:07:573 hrs ago1733116077IN
Krystal: Router
2 POL0.0063038335.90270401
Swap649794672024-12-02 4:25:053 hrs ago1733113505IN
Krystal: Router
10 POL0.0280129107.14441647
Swap649776892024-12-02 3:19:244 hrs ago1733109564IN
Krystal: Router
1.65 POL0.011235562.8682809
Swap649768832024-12-02 2:49:485 hrs ago1733107788IN
Krystal: Router
2 POL0.0092988435.56480155
Swap649768542024-12-02 2:48:465 hrs ago1733107726IN
Krystal: Router
1 POL0.0067829938.6317409
Swap649767252024-12-02 2:44:085 hrs ago1733107448IN
Krystal: Router
1.5 POL0.0089079734.07144499
Swap649765872024-12-02 2:39:145 hrs ago1733107154IN
Krystal: Router
1 POL0.0110414642.22776665
Swap649765342024-12-02 2:37:225 hrs ago1733107042IN
Krystal: Router
1 POL0.0116410344.52079807
Swap649764862024-12-02 2:35:225 hrs ago1733106922IN
Krystal: Router
1 POL0.0127718848.84570502
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Latest 25 internal transactions (View All)

Parent Transaction Hash Block From To
649852452024-12-02 7:55:5516 mins ago1733126155
Krystal: Router
0.999 POL
649850002024-12-02 7:47:1525 mins ago1733125635
Krystal: Router
1.998 POL
649849592024-12-02 7:45:4726 mins ago1733125547
Krystal: Router
1.998 POL
649848992024-12-02 7:43:4128 mins ago1733125421
Krystal: Router
1.998 POL
649848642024-12-02 7:42:2730 mins ago1733125347
Krystal: Router
1.998 POL
649847772024-12-02 7:39:0433 mins ago1733125144
Krystal: Router
5.994 POL
649847272024-12-02 7:37:0235 mins ago1733125022
Krystal: Router
4.995 POL
649846922024-12-02 7:35:4836 mins ago1733124948
Krystal: Router
3.996 POL
649846922024-12-02 7:35:4836 mins ago1733124948
Krystal: Router
0.999 POL
649846532024-12-02 7:34:2438 mins ago1733124864
Krystal: Router
0.999 POL
649845882024-12-02 7:32:0640 mins ago1733124726
Krystal: Router
0.999 POL
649844882024-12-02 7:28:0244 mins ago1733124482
Krystal: Router
0.999 POL
649844452024-12-02 7:26:3046 mins ago1733124390
Krystal: Router
0.999 POL
649818962024-12-02 5:53:432 hrs ago1733118823
Krystal: Router
0.8991 POL
649818432024-12-02 5:51:512 hrs ago1733118711
Krystal: Router
0.7992 POL
649817452024-12-02 5:48:232 hrs ago1733118503
Krystal: Router
0.8991 POL
649806232024-12-02 5:07:573 hrs ago1733116077
Krystal: Router
1.998 POL
649794672024-12-02 4:25:053 hrs ago1733113505
Krystal: Router
9.99 POL
649776892024-12-02 3:19:244 hrs ago1733109564
Krystal: Router
1.64835 POL
649768832024-12-02 2:49:485 hrs ago1733107788
Krystal: Router
1.998 POL
649768542024-12-02 2:48:465 hrs ago1733107726
Krystal: Router
0.999 POL
649767252024-12-02 2:44:085 hrs ago1733107448
Krystal: Router
1.4985 POL
649765872024-12-02 2:39:145 hrs ago1733107154
Krystal: Router
0.999 POL
649765342024-12-02 2:37:225 hrs ago1733107042
Krystal: Router
0.999 POL
649764862024-12-02 2:35:225 hrs ago1733106922
Krystal: Router
0.999 POL
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Contract Source Code Verified (Exact Match)

Contract Name:
SmartWalletProxy

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 780 runs

Other Settings:
default evmVersion
File 1 of 12 : SmartWalletProxy.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;

import "./SmartWalletStorage.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";

contract SmartWalletProxy is SmartWalletStorage {
    using Address for address;
    using EnumerableSet for EnumerableSet.AddressSet;

    event ImplementationUpdated(address indexed implementation);

    constructor(
        address _admin,
        address _implementation,
        address[] memory _supportedPlatformWallets,
        address[] memory _supportedSwaps,
        address[] memory _supportedLendings
    ) SmartWalletStorage(_admin) {
        _setImplementation(_implementation);
        for (uint256 i = 0; i < _supportedPlatformWallets.length; i++) {
            supportedPlatformWallets.add(_supportedPlatformWallets[i]);
        }
        for (uint256 i = 0; i < _supportedSwaps.length; i++) {
            supportedSwaps.add(_supportedSwaps[i]);
        }
        for (uint256 i = 0; i < _supportedLendings.length; i++) {
            supportedLendings.add(_supportedLendings[i]);
        }
    }

    receive() external payable {}

    /**
     * @dev Delegates execution to an implementation contract.
     * It returns to the external caller whatever the implementation returns
     * or forwards reverts.
     */
    fallback() external payable {
        (bool success, ) = implementation().delegatecall(msg.data);
        assembly {
            let free_mem_ptr := mload(0x40)
            returndatacopy(free_mem_ptr, 0, returndatasize())
            switch success
                case 0 {
                    revert(free_mem_ptr, returndatasize())
                }
                default {
                    return(free_mem_ptr, returndatasize())
                }
        }
    }

    function implementation() public view returns (address impl) {
        bytes32 slot = IMPLEMENTATION;
        assembly {
            impl := sload(slot)
        }
    }

    function _setImplementation(address _implementation) internal {
        require(_implementation.isContract(), "non-contract address");

        bytes32 slot = IMPLEMENTATION;
        assembly {
            sstore(slot, _implementation)
        }
    }

    function updateNewImplementation(address _implementation) external onlyAdmin {
        _setImplementation(_implementation);
        emit ImplementationUpdated(_implementation);
    }

    function updateSupportedSwaps(address[] calldata addresses, bool isSupported)
        external onlyAdmin
    {
        for (uint256 i = 0; i < addresses.length; i++) {
            if (isSupported) {
                supportedSwaps.add(addresses[i]);
            } else {
                supportedSwaps.remove(addresses[i]);
            }
        }
    }

    function getAllSupportedSwaps() external view returns (address[] memory addresses) {
        uint256 length = supportedSwaps.length();
        addresses = new address[](length);
        for (uint256 i = 0; i < length; i++) {
            addresses[i] = supportedSwaps.at(i);
        }
    }

    function updateSupportedLendings(address[] calldata addresses, bool isSupported)
        external onlyAdmin
    {
        for (uint256 i = 0; i < addresses.length; i++) {
            if (isSupported) {
                supportedLendings.add(addresses[i]);
            } else {
                supportedLendings.remove(addresses[i]);
            }
        }
    }

    function getAllSupportedLendings() external view returns (address[] memory addresses) {
        uint256 length = supportedLendings.length();
        addresses = new address[](length);
        for (uint256 i = 0; i < length; i++) {
            addresses[i] = supportedLendings.at(i);
        }
    }

    function updateSupportedPlatformWallets(address[] calldata addresses, bool isSupported)
        external onlyAdmin
    {
        for (uint256 i = 0; i < addresses.length; i++) {
            if (isSupported) {
                supportedPlatformWallets.add(addresses[i]);
            } else {
                supportedPlatformWallets.remove(addresses[i]);
            }
        }
    }

    function getAllSupportedPlatformWallets() external view returns (address[] memory addresses) {
        uint256 length = supportedPlatformWallets.length();
        addresses = new address[](length);
        for (uint256 i = 0; i < length; i++) {
            addresses[i] = supportedPlatformWallets.at(i);
        }
    }
}

File 2 of 12 : SmartWalletStorage.sol
// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.7.6;

import "@kyber.network/utils-sc/contracts/IERC20Ext.sol";
import "@kyber.network/utils-sc/contracts/Utils.sol";
import "@kyber.network/utils-sc/contracts/Withdrawable.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";

contract SmartWalletStorage is Utils, Withdrawable, ReentrancyGuard {
    uint256 internal constant MAX_AMOUNT = type(uint256).max;

    mapping(address => mapping(IERC20Ext => uint256)) public platformWalletFees;

    EnumerableSet.AddressSet internal supportedPlatformWallets;
    
    EnumerableSet.AddressSet internal supportedSwaps;

    EnumerableSet.AddressSet internal supportedLendings;

    // [EIP-1967] bytes32(uint256(keccak256("SmartWalletImplementation")) - 1)
    bytes32 internal constant IMPLEMENTATION =
        0x7cf58d76330f82325c2a503c72b55abca3eb533fadde43d95e3c0cceb1583e99;

    constructor(address _admin) Withdrawable(_admin) {}
}

File 3 of 12 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 4 of 12 : EnumerableSet.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`)
 * and `uint256` (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;

        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) { // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // Bytes32Set

    struct Bytes32Set {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _add(set._inner, value);
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) {
        return _remove(set._inner, value);
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) {
        return _contains(set._inner, value);
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(Bytes32Set storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) {
        return _at(set._inner, index);
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(uint160(value))));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint160(uint256(_at(set._inner, index))));
    }


    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

File 5 of 12 : IERC20Ext.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";


/**
 * @dev Interface extending ERC20 standard to include decimals() as
 *      it is optional in the OpenZeppelin IERC20 interface.
 */
interface IERC20Ext is IERC20 {
    /**
     * @dev This function is required as Kyber requires to interact
     *      with token.decimals() with many of its operations.
     */
    function decimals() external view returns (uint8 digits);
}

File 6 of 12 : Utils.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;

import "./IERC20Ext.sol";


/**
 * @title Kyber utility file
 * mostly shared constants and rate calculation helpers
 * inherited by most of kyber contracts.
 * previous utils implementations are for previous solidity versions.
 */
abstract contract Utils {
    // Declared constants below to be used in tandem with
    // getDecimalsConstant(), for gas optimization purposes
    // which return decimals from a constant list of popular
    // tokens.
    IERC20Ext internal constant ETH_TOKEN_ADDRESS = IERC20Ext(
        0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE
    );
    IERC20Ext internal constant USDT_TOKEN_ADDRESS = IERC20Ext(
        0xdAC17F958D2ee523a2206206994597C13D831ec7
    );
    IERC20Ext internal constant DAI_TOKEN_ADDRESS = IERC20Ext(
        0x6B175474E89094C44Da98b954EedeAC495271d0F
    );
    IERC20Ext internal constant USDC_TOKEN_ADDRESS = IERC20Ext(
        0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48
    );
    IERC20Ext internal constant WBTC_TOKEN_ADDRESS = IERC20Ext(
        0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599
    );
    IERC20Ext internal constant KNC_TOKEN_ADDRESS = IERC20Ext(
        0xdd974D5C2e2928deA5F71b9825b8b646686BD200
    );
    uint256 public constant BPS = 10000; // Basic Price Steps. 1 step = 0.01%
    uint256 internal constant PRECISION = (10**18);
    uint256 internal constant MAX_QTY = (10**28); // 10B tokens
    uint256 internal constant MAX_RATE = (PRECISION * 10**7); // up to 10M tokens per eth
    uint256 internal constant MAX_DECIMALS = 18;
    uint256 internal constant ETH_DECIMALS = 18;
    uint256 internal constant MAX_ALLOWANCE = uint256(-1); // token.approve inifinite

    mapping(IERC20Ext => uint256) internal decimals;

    /// @dev Sets the decimals of a token to storage if not already set, and returns
    ///      the decimals value of the token. Prefer using this function over
    ///      getDecimals(), to avoid forgetting to set decimals in local storage.
    /// @param token The token type
    /// @return tokenDecimals The decimals of the token
    function getSetDecimals(IERC20Ext token) internal returns (uint256 tokenDecimals) {
        tokenDecimals = getDecimalsConstant(token);
        if (tokenDecimals > 0) return tokenDecimals;

        tokenDecimals = decimals[token];
        if (tokenDecimals == 0) {
            tokenDecimals = token.decimals();
            decimals[token] = tokenDecimals;
        }
    }

    /// @dev Get the balance of a user
    /// @param token The token type
    /// @param user The user's address
    /// @return The balance
    function getBalance(IERC20Ext token, address user) internal view returns (uint256) {
        if (token == ETH_TOKEN_ADDRESS) {
            return user.balance;
        } else {
            return token.balanceOf(user);
        }
    }

    /// @dev Get the decimals of a token, read from the constant list, storage,
    ///      or from token.decimals(). Prefer using getSetDecimals when possible.
    /// @param token The token type
    /// @return tokenDecimals The decimals of the token
    function getDecimals(IERC20Ext token) internal view returns (uint256 tokenDecimals) {
        // return token decimals if has constant value
        tokenDecimals = getDecimalsConstant(token);
        if (tokenDecimals > 0) return tokenDecimals;

        // handle case where token decimals is not a declared decimal constant
        tokenDecimals = decimals[token];
        // moreover, very possible that old tokens have decimals 0
        // these tokens will just have higher gas fees.
        return (tokenDecimals > 0) ? tokenDecimals : token.decimals();
    }

    function calcDestAmount(
        IERC20Ext src,
        IERC20Ext dest,
        uint256 srcAmount,
        uint256 rate
    ) internal view returns (uint256) {
        return calcDstQty(srcAmount, getDecimals(src), getDecimals(dest), rate);
    }

    function calcSrcAmount(
        IERC20Ext src,
        IERC20Ext dest,
        uint256 destAmount,
        uint256 rate
    ) internal view returns (uint256) {
        return calcSrcQty(destAmount, getDecimals(src), getDecimals(dest), rate);
    }

    function calcDstQty(
        uint256 srcQty,
        uint256 srcDecimals,
        uint256 dstDecimals,
        uint256 rate
    ) internal pure returns (uint256) {
        require(srcQty <= MAX_QTY, "srcQty > MAX_QTY");
        require(rate <= MAX_RATE, "rate > MAX_RATE");

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
            return (srcQty * rate * (10**(dstDecimals - srcDecimals))) / PRECISION;
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
            return (srcQty * rate) / (PRECISION * (10**(srcDecimals - dstDecimals)));
        }
    }

    function calcSrcQty(
        uint256 dstQty,
        uint256 srcDecimals,
        uint256 dstDecimals,
        uint256 rate
    ) internal pure returns (uint256) {
        require(dstQty <= MAX_QTY, "dstQty > MAX_QTY");
        require(rate <= MAX_RATE, "rate > MAX_RATE");

        //source quantity is rounded up. to avoid dest quantity being too low.
        uint256 numerator;
        uint256 denominator;
        if (srcDecimals >= dstDecimals) {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
            numerator = (PRECISION * dstQty * (10**(srcDecimals - dstDecimals)));
            denominator = rate;
        } else {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
            numerator = (PRECISION * dstQty);
            denominator = (rate * (10**(dstDecimals - srcDecimals)));
        }
        return (numerator + denominator - 1) / denominator; //avoid rounding down errors
    }

    function calcRateFromQty(
        uint256 srcAmount,
        uint256 destAmount,
        uint256 srcDecimals,
        uint256 dstDecimals
    ) internal pure returns (uint256) {
        require(srcAmount <= MAX_QTY, "srcAmount > MAX_QTY");
        require(destAmount <= MAX_QTY, "destAmount > MAX_QTY");

        if (dstDecimals >= srcDecimals) {
            require((dstDecimals - srcDecimals) <= MAX_DECIMALS, "dst - src > MAX_DECIMALS");
            return ((destAmount * PRECISION) / ((10**(dstDecimals - srcDecimals)) * srcAmount));
        } else {
            require((srcDecimals - dstDecimals) <= MAX_DECIMALS, "src - dst > MAX_DECIMALS");
            return ((destAmount * PRECISION * (10**(srcDecimals - dstDecimals))) / srcAmount);
        }
    }

    /// @dev save storage access by declaring token decimal constants
    /// @param token The token type
    /// @return token decimals
    function getDecimalsConstant(IERC20Ext token) internal pure returns (uint256) {
        if (token == ETH_TOKEN_ADDRESS) {
            return ETH_DECIMALS;
        } else if (token == USDT_TOKEN_ADDRESS) {
            return 6;
        } else if (token == DAI_TOKEN_ADDRESS) {
            return 18;
        } else if (token == USDC_TOKEN_ADDRESS) {
            return 6;
        } else if (token == WBTC_TOKEN_ADDRESS) {
            return 8;
        } else if (token == KNC_TOKEN_ADDRESS) {
            return 18;
        } else {
            return 0;
        }
    }

    function minOf(uint256 x, uint256 y) internal pure returns (uint256) {
        return x > y ? y : x;
    }
}

File 7 of 12 : Withdrawable.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;

import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "./IERC20Ext.sol";
import "./PermissionAdmin.sol";


abstract contract Withdrawable is PermissionAdmin {
    using SafeERC20 for IERC20Ext;

    event TokenWithdraw(IERC20Ext token, uint256 amount, address sendTo);
    event EtherWithdraw(uint256 amount, address sendTo);

    constructor(address _admin) PermissionAdmin(_admin) {}

    /**
     * @dev Withdraw all IERC20Ext compatible tokens
     * @param token IERC20Ext The address of the token contract
     */
    function withdrawToken(
        IERC20Ext token,
        uint256 amount,
        address sendTo
    ) external onlyAdmin {
        token.safeTransfer(sendTo, amount);
        emit TokenWithdraw(token, amount, sendTo);
    }

    /**
     * @dev Withdraw Ethers
     */
    function withdrawEther(uint256 amount, address payable sendTo) external onlyAdmin {
        (bool success, ) = sendTo.call{value: amount}("");
        require(success, "withdraw failed");
        emit EtherWithdraw(amount, sendTo);
    }
}

File 8 of 12 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 () internal {
        _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 make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 9 of 12 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 10 of 12 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 11 of 12 : PermissionAdmin.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.7.6;


abstract contract PermissionAdmin {
    address public admin;
    address public pendingAdmin;

    event AdminClaimed(address newAdmin, address previousAdmin);

    event TransferAdminPending(address pendingAdmin);

    constructor(address _admin) {
        require(_admin != address(0), "admin 0");
        admin = _admin;
    }

    modifier onlyAdmin() {
        require(msg.sender == admin, "only admin");
        _;
    }

    /**
     * @dev Allows the current admin to set the pendingAdmin address.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdmin(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0), "new admin 0");
        emit TransferAdminPending(newAdmin);
        pendingAdmin = newAdmin;
    }

    /**
     * @dev Allows the current admin to set the admin in one tx. Useful initial deployment.
     * @param newAdmin The address to transfer ownership to.
     */
    function transferAdminQuickly(address newAdmin) public onlyAdmin {
        require(newAdmin != address(0), "admin 0");
        emit TransferAdminPending(newAdmin);
        emit AdminClaimed(newAdmin, admin);
        admin = newAdmin;
    }

    /**
     * @dev Allows the pendingAdmin address to finalize the change admin process.
     */
    function claimAdmin() public {
        require(pendingAdmin == msg.sender, "not pending");
        emit AdminClaimed(pendingAdmin, admin);
        admin = pendingAdmin;
        pendingAdmin = address(0);
    }
}

File 12 of 12 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 780
  },
  "metadata": {
    "bytecodeHash": "none"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"address","name":"_admin","type":"address"},{"internalType":"address","name":"_implementation","type":"address"},{"internalType":"address[]","name":"_supportedPlatformWallets","type":"address[]"},{"internalType":"address[]","name":"_supportedSwaps","type":"address[]"},{"internalType":"address[]","name":"_supportedLendings","type":"address[]"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newAdmin","type":"address"},{"indexed":false,"internalType":"address","name":"previousAdmin","type":"address"}],"name":"AdminClaimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"sendTo","type":"address"}],"name":"EtherWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"implementation","type":"address"}],"name":"ImplementationUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"contract IERC20Ext","name":"token","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"},{"indexed":false,"internalType":"address","name":"sendTo","type":"address"}],"name":"TokenWithdraw","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"pendingAdmin","type":"address"}],"name":"TransferAdminPending","type":"event"},{"stateMutability":"payable","type":"fallback"},{"inputs":[],"name":"BPS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"claimAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getAllSupportedLendings","outputs":[{"internalType":"address[]","name":"addresses","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAllSupportedPlatformWallets","outputs":[{"internalType":"address[]","name":"addresses","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAllSupportedSwaps","outputs":[{"internalType":"address[]","name":"addresses","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"impl","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pendingAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"contract IERC20Ext","name":"","type":"address"}],"name":"platformWalletFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"transferAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"transferAdminQuickly","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_implementation","type":"address"}],"name":"updateNewImplementation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"addresses","type":"address[]"},{"internalType":"bool","name":"isSupported","type":"bool"}],"name":"updateSupportedLendings","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"addresses","type":"address[]"},{"internalType":"bool","name":"isSupported","type":"bool"}],"name":"updateSupportedPlatformWallets","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address[]","name":"addresses","type":"address[]"},{"internalType":"bool","name":"isSupported","type":"bool"}],"name":"updateSupportedSwaps","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address payable","name":"sendTo","type":"address"}],"name":"withdrawEther","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20Ext","name":"token","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"sendTo","type":"address"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

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

-----Decoded View---------------
Arg [0] : _admin (address): 0xa3e78aB6f120C730D6F3939c0Dc6dcD0E3da7278
Arg [1] : _implementation (address): 0x60fc810EA972809d729FCE0043B82a58766596ee
Arg [2] : _supportedPlatformWallets (address[]): 0xa1738F8DD7c42cd4175CcdCa79Af89b3EC7b68E9,0x5250b8202AEBca35328E2c217C687E894d70Cd31,0x168E4c3AC8d89B00958B6bE6400B066f0347DDc9
Arg [3] : _supportedSwaps (address[]): 0x66f54006B47d1b381b5B933F2De9bf05a6B4Eb40,0xAE0505c0C30Dc0EA077cDB4Ed1B2BB894D9c6B65
Arg [4] : _supportedLendings (address[]): 0x2bcfCaA40395F4f38Ad1aFa8915BF11d9df8Cf56

-----Encoded View---------------
14 Constructor Arguments found :
Arg [0] : 000000000000000000000000a3e78ab6f120c730d6f3939c0dc6dcd0e3da7278
Arg [1] : 00000000000000000000000060fc810ea972809d729fce0043b82a58766596ee
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000180
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [6] : 000000000000000000000000a1738f8dd7c42cd4175ccdca79af89b3ec7b68e9
Arg [7] : 0000000000000000000000005250b8202aebca35328e2c217c687e894d70cd31
Arg [8] : 000000000000000000000000168e4c3ac8d89b00958b6be6400b066f0347ddc9
Arg [9] : 0000000000000000000000000000000000000000000000000000000000000002
Arg [10] : 00000000000000000000000066f54006b47d1b381b5b933f2de9bf05a6b4eb40
Arg [11] : 000000000000000000000000ae0505c0c30dc0ea077cdb4ed1b2bb894d9c6b65
Arg [12] : 0000000000000000000000000000000000000000000000000000000000000001
Arg [13] : 0000000000000000000000002bcfcaa40395f4f38ad1afa8915bf11d9df8cf56


Block Transaction Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

Krystal's router contract.

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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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Chain Token Portfolio % Price Amount Value
ETH21.62%$3,672.440.036$132.19
ETH8.59%$0.99986552.503$52.5
ETH5.86%$0.99912535.8514$35.82
ETH1.69%$1.725.9927$10.31
ETH1.51%$0.28831132.1273$9.26
ETH1.42%$0.69820512.417$8.67
ETH1.41%$0.073817117.0301$8.64
ETH1.29%$0.61007712.908$7.87
ETH1.28%$3,672.440.00213261$7.83
ETH1.27%$0.8320279.3366$7.77
ETH1.23%$3,763.480.00200592$7.55
ETH1.11%$0.45176715.0441$6.8
ETH0.82%$0.9419965.3118$5
ETH0.78%$6.640.7216$4.79
ETH0.78%$616.570.00775081$4.78
ETH0.70%$0.5346818$4.28
ETH0.67%$3.31.2444$4.11
ETH0.64%$3.891$3.89
ETH0.63%$13.8267$3.83
ETH0.63%$0.0000021,683,495.8024$3.82
ETH0.60%$114.880.0321$3.68
ETH0.60%$0.7527244.8397$3.64
ETH0.57%$1.821.9315$3.52
ETH0.52%$13.270.24$3.18
ETH0.51%$0.4733546.5893$3.12
ETH0.50%$0.011047274.2857$3.03
ETH0.49%$0.06710344.7997$3.01
ETH0.47%$19.760.1458$2.88
ETH0.44%$0.03233782.4715$2.67
ETH0.40%$1.341.8433$2.48
ETH0.38%$0.5522434.2333$2.34
ETH0.36%$0.2540138.6475$2.2
ETH0.35%$0.03726457.3226$2.14
ETH0.33%$5.660.3586$2.03
ETH0.32%$0.2433518$1.95
ETH0.32%$0.00002193,486.7444$1.94
ETH0.29%$0.6982142.5677$1.79
ETH0.29%$1.261.4141$1.78
ETH0.28%<$0.000001110,587,551$1.72
ETH0.26%$0.001614993.0495$1.6
ETH0.24%$0.01648489.4118$1.47
ETH0.23%$12.250.1172$1.44
ETH0.23%$3.760.376$1.41
ETH0.22%$0.0000011,674,835.2431$1.37
ETH0.22%$0.0003344,029.6834$1.34
ETH0.21%$0.05271824$1.27
ETH0.21%<$0.00000110,911,415.5645$1.25
ETH0.20%$0.1282699.736$1.25
ETH0.20%$0.004315288.1894$1.24
ETH0.20%$0.0000011,814,775.8938$1.23
ETH0.18%$0.5630291.964$1.11
ETH0.18%$0.04611523.8306$1.1
ETH0.17%$0.004644225.2024$1.05
ETH0.17%$0.1277568$1.02
ETH0.15%$0.01899449.8412$0.9466
ETH0.15%$1.20.7691$0.9229
ETH0.15%$0.3608572.5314$0.9134
ETH0.15%$0.1191157.588$0.9038
ETH0.14%$3,759.010.0002311$0.8687
ETH0.13%$3,771.690.00021846$0.8239
ETH0.13%$0.6349261.2389$0.7866
ETH0.13%$0.1314265.9141$0.7772
ETH0.13%$0.31972.4$0.7672
ETH0.12%$0.9338310.7905$0.7382
ETH0.12%$0.001993357.6419$0.7129
ETH0.12%$0.4433571.6$0.7093
ETH0.11%$1.450.4748$0.6885
ETH0.11%$19.290.0342$0.6603
ETH0.11%$0.03077621.3012$0.6555
ETH0.10%$0.01773336.0145$0.6386
ETH0.10%$0.0254225.0125$0.6358
ETH0.10%$0.3364891.854$0.6238
ETH0.10%$1.330.4665$0.6203
ETH0.10%$0.05290311.5584$0.6114
ETH0.10%$0.05448311$0.5993
ETH0.09%$647.380.00085$0.5502
ETH0.09%$0.0000318,241.6493$0.5485
ETH0.09%$0.0067179.3349$0.5323
ETH0.09%$0.1790092.96$0.5298
ETH0.08%$0.0000677,230.32$0.4859
ETH0.08%$30.460.0159$0.4848
ETH0.08%$0.0001084,500.067$0.4842
ETH0.08%$0.9357560.4983$0.4662
ETH0.08%$0.0526568.8397$0.4654
ETH0.08%$0.0004151,115.9575$0.4629
ETH0.07%$0.3876891.175$0.4555
ETH0.07%$8.480.0537$0.455
ETH0.07%$0.1143323.9233$0.4485
ETH0.07%$4,349.930.0001$0.4349
ETH0.07%$0.042749.9268$0.4242
ETH0.07%$0.1107473.793$0.42
ETH0.07%$95,8420.00000423$0.4054
ETH0.07%$1,852.140.00021655$0.401
ETH0.06%$0.02241817.5921$0.3943
ETH0.06%$3.560.109$0.388
ETH0.06%$0.1592822.3654$0.3767
ETH0.06%$0.7831040.4536$0.3552
ETH0.06%$0.1852341.8767$0.3476
ETH0.06%$0.00933237.2$0.3471
ETH0.06%$0.3101031.0993$0.3409
ETH0.05%$0.00318101.718$0.3234
ETH0.05%$104.030.00304$0.3162
ETH0.05%$0.0001372,306.4867$0.316
ETH0.05%$0.00000840,000$0.3132
ETH0.05%$0.1294182.2889$0.2962
ETH0.05%$0.1257422.3048$0.2898
ETH0.05%$340.550.00084054$0.2862
ETH0.05%$0.01643616.9917$0.2792
ETH0.04%$0.02055813.3302$0.274
ETH0.04%$0.02143112.7196$0.2725
ETH0.04%$0.01078625.0847$0.2705
ETH0.04%$59.180.0042$0.2485
ETH0.04%$0.00264192.9796$0.2455
ETH0.04%$213.970.00109682$0.2346
ETH0.03%$0.0000434,845.2191$0.209
ETH0.03%$0.030826.5225$0.201
ETH0.03%$0.8579450.2171$0.1862
ETH0.03%$0.6936860.2524$0.1751
ETH0.03%$0.00712122.3543$0.1591
ETH0.03%$0.0001561,000$0.1556
ETH0.02%$0.00642121.4472$0.1377
ETH0.02%$0.00229959$0.1356
ETH0.02%$0.00000194,746.675$0.1231
ETH0.02%$0.4379870.2755$0.1206
ETH0.02%$1.830.06$0.1098
ETH0.02%$1.990.0518$0.103
ETH0.02%$0.00256140$0.1024
POL
Polygon (POL)
4.59%$0.61211745.861$28.07
POL1.49%$19.114$9.11
POL1.33%$18.1438$8.14
POL1.17%$228.640.0312$7.14
POL0.69%$3,670.960.00115012$4.22
POL0.62%$13.8091$3.81
POL0.45%$0.7542833.681$2.78
POL0.39%$3.570.6707$2.39
POL0.39%$0.05297144.794$2.37
POL0.34%$19.820.1041$2.06
POL0.31%$1.051.7832$1.87
POL0.28%$1.451.2$1.74
POL0.26%$0.7018962.2898$1.61
POL0.25%$0.00004335,071.0304$1.52
POL0.25%$1.081.39$1.5
POL0.23%$0.006892202.32$1.39
POL0.23%$0.0002345,918.7036$1.38
POL0.22%$0.6416032.1316$1.37
POL0.21%$8.480.1509$1.28
POL0.21%$0.0003663,444.4839$1.26
POL0.20%$1.750.7016$1.23
POL0.20%$95,9780.0000126$1.21
POL0.17%$0.2208294.6773$1.03
POL0.13%$0.2372923.2734$0.7767
POL0.10%$0.2283732.667$0.609
POL0.09%$13.030.0441$0.5745
POL0.09%$0.6121580.8885$0.5439
POL0.08%$0.9999990.4959$0.4958
POL0.08%$1.050.4633$0.4883
POL0.07%$0.2505451.6954$0.4247
POL0.06%$0.000882449.4778$0.3965
POL0.06%$0.003294120$0.3953
POL0.06%$8,234.190.0000475$0.3911
POL0.06%<$0.00000126,406,148.6596$0.3696
POL0.06%$340.450.0009915$0.3375
POL0.05%$0.6357890.525$0.3337
POL0.05%$214.670.00154297$0.3312
POL0.05%$4.060.0799$0.3245
POL0.05%$0.00664543.0069$0.2857
POL0.04%$0.01034322.3704$0.2313
POL0.03%$0.00463535.9697$0.1667
POL0.02%$0.6920280.2186$0.1512
POL0.02%$0.2895480.4193$0.1214
POL0.02%$95,9180.00000116$0.1113
POL0.02%$0.0042225.7218$0.1085
BSC12.28%$647.250.116$75.08
BSC0.04%$0.000654328.1551$0.2144
BASE1.20%$3,672.80.002$7.35
BASE0.29%$0.11179415.695$1.75
FTM0.02%$1.040.1$0.104128
GNO<0.01%$0.9999480.0004$0.0004
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.