Goerli Testnet

Contract

0xd00CCD251869086eCD8B54f328Df1d623369b8F6
Source Code

Overview

ETH Balance

5.81 ETH

Token Holdings

Multichain Info

N/A
Transaction Hash
Method
Block
From
To
Value
Set Minimum App ...87112902023-03-24 18:01:24338 days 3 hrs ago1679680884IN
0xd00CCD...3369b8F6
0 ETH0.0017024764.20062956
Register App84869082023-02-13 21:52:00376 days 23 hrs ago1676325120IN
0xd00CCD...3369b8F6
0.5 ETH0.000464743.12865797
Top Up Balance83637792023-01-23 19:38:00398 days 2 hrs ago1674502680IN
0xd00CCD...3369b8F6
0.1 ETH0.000040481.50000004
Top Up Balance83636672023-01-23 19:10:48398 days 2 hrs ago1674501048IN
0xd00CCD...3369b8F6
1 ETH0.000040481.50000002
Top Up Balance81896982022-12-24 1:57:48428 days 19 hrs ago1671847068IN
0xd00CCD...3369b8F6
0.01 ETH0.000040481.50000001
Set Minimum App ...81892682022-12-24 0:08:12428 days 21 hrs ago1671840492IN
0xd00CCD...3369b8F6
0 ETH0.000048491
Register App79190542022-11-09 2:24:24473 days 19 hrs ago1667960664IN
0xd00CCD...3369b8F6
1 ETH0.000172671.02190365
Register App79190292022-11-09 2:18:24473 days 19 hrs ago1667960304IN
0xd00CCD...3369b8F6
1 ETH0.000219111.02448807
Top Up Balance79187432022-11-09 1:12:24473 days 20 hrs ago1667956344IN
0xd00CCD...3369b8F6
1 ETH0.00005912.19023257
Top Up Balance79186512022-11-09 0:50:00473 days 20 hrs ago1667955000IN
0xd00CCD...3369b8F6
1 ETH0.000051451.90658307
Set Trusted Paym...79176882022-11-08 21:08:36474 days 33 mins ago1667941716IN
0xd00CCD...3369b8F6
0 ETH0.000230784.73935721
Register App79176722022-11-08 21:04:48474 days 37 mins ago1667941488IN
0xd00CCD...3369b8F6
0.2 ETH0.000981954.25158968
0x6080604079176312022-11-08 20:55:36474 days 46 mins ago1667940936IN
 Create: Web3Analytics
0 ETH0.009959467.54603321

Latest 25 internal transactions (View All)

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89375012023-05-04 0:14:48297 days 21 hrs ago1683159288
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89375012023-05-04 0:14:48297 days 21 hrs ago1683159288
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89375012023-05-04 0:14:48297 days 21 hrs ago1683159288
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89370922023-05-03 22:32:00297 days 23 hrs ago1683153120
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89370922023-05-03 22:32:00297 days 23 hrs ago1683153120
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89370922023-05-03 22:32:00297 days 23 hrs ago1683153120
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89369252023-05-03 21:50:48297 days 23 hrs ago1683150648
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89368022023-05-03 21:21:12298 days 20 mins ago1683148872
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89368022023-05-03 21:21:12298 days 20 mins ago1683148872
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Contract Source Code Verified (Exact Match)

Contract Name:
Web3Analytics

Compiler Version
v0.8.7+commit.e28d00a7

Optimization Enabled:
Yes with 10 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 7 : Web3Analytics.sol
//SPDX-License-Identifier: Unlicense
pragma solidity ^0.8.7;

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
import "@opengsn/contracts/src/ERC2771Recipient.sol";



contract Web3Analytics is ERC2771Recipient, Ownable {
    using Address for address;
    using EnumerableSet for EnumerableSet.AddressSet;

    struct Registration {
        address userAddress;
        string userDid;
    }

    struct App {
        address appAddress;
        string appName;
        string appUrl;
    }

    address private allowedPaymaster;
    uint256 private feeInBasisPoints;
    uint256 private minimumAppRegBalance;
    EnumerableSet.AddressSet private registeredApps;
    mapping(address => App) private appData;
    mapping(address => uint256) private appBalances;
    mapping(address => Registration[]) private appRegistrations;
    mapping(address => EnumerableSet.AddressSet) private appUsers;


    /**
    * @dev the Web3Analytics contract constructor
    * @param forwarder the trusted forwarder contract address
    **/

    constructor(address forwarder) {
        _setTrustedForwarder(forwarder);
    }


    /**
    * @dev sets trusted paymaster
    * @param paymaster the address of our trusted paymaster
    **/

    function setTrustedPaymaster(address paymaster) public onlyOwner {
        allowedPaymaster = paymaster;
    }


    /**
    * @dev gets trusted paymaster
    **/

    function getTrustedPaymaster() public view returns(address) {
        return allowedPaymaster;
    }


    /**
    * @dev sets feeInBasisPoints
    * @param fee the fee in basis points
    **/

    function setNetworkFee(uint256 fee) public onlyOwner {
        feeInBasisPoints = fee;
    }


    /**
    * @dev gets feeInBasisPoints
    **/

    function getNetworkFee() public view returns(uint256) {
        return feeInBasisPoints;
    }


    /**
    * @dev sets minimum balance required to register an app
    * @param balance the minimum balance
    **/

    function setMinimumAppRegBalance(uint256 balance) public onlyOwner {
        minimumAppRegBalance = balance;
    }


    /**
    * @dev gets minimum balance required to register an app
    **/

    function getMinimumAppRegBalance() public view returns(uint256) {
        return minimumAppRegBalance;
    }


    /**
    * @dev provides a list of an app's users
    * @param app the application to retrieve users for
    **/

    function getUsers(address app) public view returns(address[] memory) {
        return appUsers[app].values();
    }


    /**
    * @dev provides a count of an app's users
    * @param app the application to retrieve users for
    **/

    function getUserCount(address app) public view returns(uint256) {
        return appUsers[app].length();
    }


    /**
    * @dev provides a list of an app's registrations
    * @param app the application to retrieve registrations for
    **/

    function getUserRegistrations(address app) public view returns(Registration[] memory) {
        return appRegistrations[app];
    }


    /**
    * @dev returns whether app is registered or not
    * @param app the application to check registration for
    **/

    function isAppRegistered(address app) public view returns(bool) {
        return registeredApps.contains(app);
    }


    /**
    * @dev returns whether user is registered for given app
    * @param app the application to check registration for
    **/

    function isUserRegistered(address app, address user) public view returns(bool) {
        return appUsers[app].contains(user);
    }


    /**
    * @dev provides a count of apps registered
    **/

    function getAppCount() public view returns(uint256) {
        return registeredApps.length();
    }


    /**
    * @dev provides a list of apps registered
    **/

    function getApps() public view returns(address[] memory) {
        return registeredApps.values();
    }


    /**
    * @dev adds a new user to an app
    * @param did the did key for the user to add
    * @param app the address of the app to register user for
    **/

    function addUser(string memory did, address app) public {
        // app must be registered and user must not exist for app
        require(registeredApps.contains(app), "App not registered");
        require(!appUsers[app].contains(_msgSender()), "User already exists");

        appUsers[app].add(_msgSender());
        appRegistrations[app].push(Registration(_msgSender(), did));                          
    }


    /**
    * @dev registers new app for web3analytics
    * @param name the name of the app
    * @param url the app's url (optional)
    **/

    function registerApp(string memory name, string memory url) public payable {
        require(!registeredApps.contains(_msgSender()), "App already registered");
        require(bytes(name).length != 0, "Name is required");
        require(msg.value >= minimumAppRegBalance, "Minimum balance to register not met");

        registeredApps.add(_msgSender());
        appData[_msgSender()] = App(_msgSender(), name, url);
        if (msg.value > 0) appBalances[_msgSender()] = msg.value;
    }


    /**
    * @dev provides app data for registered app
    * @param app the application to retrieve data for
    **/

    function getAppData(address app) public view returns(App memory) {
        return appData[app];
    }


    /**
    * @dev updates app data for registered app
    * @param name the name of the app
    * @param url the app's url (optional)
    **/

    function updateAppData(string memory name, string memory url) public {
        require(registeredApps.contains(_msgSender()), "App not registered");
        require(bytes(name).length != 0, "Name is required");

        appData[_msgSender()] = App(_msgSender(), name, url);                          
    }


    /**
    * @dev gets account balance of an app
    * @param app the application to retrieve balance for
    **/

    function getBalance(address app) public view returns(uint256) {
        return appBalances[app];
    }


    /**
    * @dev allows adding value to account balance of an app
    * @param app the application to add value to
    **/

    function topUpBalance(address app) public payable {
        require(msg.value > 0, 'Top up must be greater than 0');
        appBalances[app] = appBalances[app] + msg.value;
    }


    /**
    * @dev allows deducting value from account balance of an app
    * @param app the application to charge fee to
    * @param fee the amount of the fee
    **/

    function chargeFee(address app, uint256 fee) public payable {
        require(allowedPaymaster != address(0), 'Trusted paymaster must be set');
        require(allowedPaymaster == _msgSender(), 'Only trusted paymaster may charge fee');

        appBalances[app] = appBalances[app] - fee;
    }


    function _msgSender() internal view override(Context, ERC2771Recipient)
        returns (address sender) {
        sender = ERC2771Recipient._msgSender();
    }

    function _msgData() internal view override(Context, ERC2771Recipient)
        returns (bytes memory) {
        return ERC2771Recipient._msgData();
    }

}

File 2 of 7 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

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

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

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

        (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");

        (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");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 3 of 7 : ERC2771Recipient.sol
// SPDX-License-Identifier: MIT
// solhint-disable no-inline-assembly
pragma solidity >=0.6.9;

import "./interfaces/IERC2771Recipient.sol";

/**
 * @title The ERC-2771 Recipient Base Abstract Class - Implementation
 *
 * @notice Note that this contract was called `BaseRelayRecipient` in the previous revision of the GSN.
 *
 * @notice A base contract to be inherited by any contract that want to receive relayed transactions.
 *
 * @notice A subclass must use `_msgSender()` instead of `msg.sender`.
 */
abstract contract ERC2771Recipient is IERC2771Recipient {

    /*
     * Forwarder singleton we accept calls from
     */
    address private _trustedForwarder;

    /**
     * :warning: **Warning** :warning: The Forwarder can have a full control over your Recipient. Only trust verified Forwarder.
     * @notice Method is not a required method to allow Recipients to trust multiple Forwarders. Not recommended yet.
     * @return forwarder The address of the Forwarder contract that is being used.
     */
    function getTrustedForwarder() public virtual view returns (address forwarder){
        return _trustedForwarder;
    }

    function _setTrustedForwarder(address _forwarder) internal {
        _trustedForwarder = _forwarder;
    }

    /// @inheritdoc IERC2771Recipient
    function isTrustedForwarder(address forwarder) public virtual override view returns(bool) {
        return forwarder == _trustedForwarder;
    }

    /// @inheritdoc IERC2771Recipient
    function _msgSender() internal override virtual view returns (address ret) {
        if (msg.data.length >= 20 && isTrustedForwarder(msg.sender)) {
            // At this point we know that the sender is a trusted forwarder,
            // so we trust that the last bytes of msg.data are the verified sender address.
            // extract sender address from the end of msg.data
            assembly {
                ret := shr(96,calldataload(sub(calldatasize(),20)))
            }
        } else {
            ret = msg.sender;
        }
    }

    /// @inheritdoc IERC2771Recipient
    function _msgData() internal override virtual view returns (bytes calldata ret) {
        if (msg.data.length >= 20 && isTrustedForwarder(msg.sender)) {
            return msg.data[0:msg.data.length-20];
        } else {
            return msg.data;
        }
    }
}

File 4 of 7 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 5 of 7 : EnumerableSet.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (utils/structs/EnumerableSet.sol)

pragma solidity ^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;

            if (lastIndex != toDeleteIndex) {
                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] = valueIndex; // Replace lastValue's index to valueIndex
            }

            // 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) {
        return set._values[index];
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function _values(Set storage set) private view returns (bytes32[] memory) {
        return set._values;
    }

    // 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);
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(Bytes32Set storage set) internal view returns (bytes32[] memory) {
        return _values(set._inner);
    }

    // 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))));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(AddressSet storage set) internal view returns (address[] memory) {
        bytes32[] memory store = _values(set._inner);
        address[] memory result;

        assembly {
            result := store
        }

        return result;
    }

    // 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));
    }

    /**
     * @dev Return the entire set in an array
     *
     * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed
     * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that
     * this function has an unbounded cost, and using it as part of a state-changing function may render the function
     * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block.
     */
    function values(UintSet storage set) internal view returns (uint256[] memory) {
        bytes32[] memory store = _values(set._inner);
        uint256[] memory result;

        assembly {
            result := store
        }

        return result;
    }
}

File 6 of 7 : IERC2771Recipient.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0;

/**
 * @title The ERC-2771 Recipient Base Abstract Class - Declarations
 *
 * @notice A contract must implement this interface in order to support relayed transaction.
 *
 * @notice It is recommended that your contract inherits from the ERC2771Recipient contract.
 */
abstract contract IERC2771Recipient {

    /**
     * :warning: **Warning** :warning: The Forwarder can have a full control over your Recipient. Only trust verified Forwarder.
     * @param forwarder The address of the Forwarder contract that is being used.
     * @return isTrustedForwarder `true` if the Forwarder is trusted to forward relayed transactions by this Recipient.
     */
    function isTrustedForwarder(address forwarder) public virtual view returns(bool);

    /**
     * @notice Use this method the contract anywhere instead of msg.sender to support relayed transactions.
     * @return sender The real sender of this call.
     * For a call that came through the Forwarder the real sender is extracted from the last 20 bytes of the `msg.data`.
     * Otherwise simply returns `msg.sender`.
     */
    function _msgSender() internal virtual view returns (address);

    /**
     * @notice Use this method in the contract instead of `msg.data` when difference matters (hashing, signature, etc.)
     * @return data The real `msg.data` of this call.
     * For a call that came through the Forwarder, the real sender address was appended as the last 20 bytes
     * of the `msg.data` - so this method will strip those 20 bytes off.
     * Otherwise (if the call was made directly and not through the forwarder) simply returns `msg.data`.
     */
    function _msgData() internal virtual view returns (bytes calldata);
}

File 7 of 7 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 10
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract ABI

[{"inputs":[{"internalType":"address","name":"forwarder","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[{"internalType":"string","name":"did","type":"string"},{"internalType":"address","name":"app","type":"address"}],"name":"addUser","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"},{"internalType":"uint256","name":"fee","type":"uint256"}],"name":"chargeFee","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"getAppCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"}],"name":"getAppData","outputs":[{"components":[{"internalType":"address","name":"appAddress","type":"address"},{"internalType":"string","name":"appName","type":"string"},{"internalType":"string","name":"appUrl","type":"string"}],"internalType":"struct Web3Analytics.App","name":"","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getApps","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"}],"name":"getBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMinimumAppRegBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getNetworkFee","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTrustedForwarder","outputs":[{"internalType":"address","name":"forwarder","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getTrustedPaymaster","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"}],"name":"getUserCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"}],"name":"getUserRegistrations","outputs":[{"components":[{"internalType":"address","name":"userAddress","type":"address"},{"internalType":"string","name":"userDid","type":"string"}],"internalType":"struct Web3Analytics.Registration[]","name":"","type":"tuple[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"}],"name":"getUsers","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"}],"name":"isAppRegistered","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"forwarder","type":"address"}],"name":"isTrustedForwarder","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"},{"internalType":"address","name":"user","type":"address"}],"name":"isUserRegistered","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"url","type":"string"}],"name":"registerApp","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"name":"setMinimumAppRegBalance","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"fee","type":"uint256"}],"name":"setNetworkFee","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"paymaster","type":"address"}],"name":"setTrustedPaymaster","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"app","type":"address"}],"name":"topUpBalance","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"url","type":"string"}],"name":"updateAppData","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

0000000000000000000000007a95fa73250dc53556d264522150a940d4c50238

-----Decoded View---------------
Arg [0] : forwarder (address): 0x7A95fA73250dc53556d264522150A940d4C50238

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000007a95fa73250dc53556d264522150a940d4c50238


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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.