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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import "@openzeppelin/contracts/utils/math/Math.sol";
import "@openzeppelin/contracts/utils/Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract PassportRegistry is Ownable, Pausable {
    // wallet => passport id
    mapping(address => uint256) public passportId;

    // passport id => wallet
    mapping(uint256 => address) public idPassport;

    // wallet => bool
    mapping(address => bool) public walletActive;

    // id => bool
    mapping(uint256 => bool) public idActive;

    // id => source
    mapping(uint256 => string) public idSource;

    // source => # passports
    mapping(string => uint256) public sourcePassports;

    // Total number of passports created
    uint256 public totalCreates;

    // Total number of passports sequencially created
    uint256 public totalSequencialCreates;

    // Total number of passports created by admins
    uint256 public totalAdminsCreates;

    // Total number of passport transfers
    uint256 public totalPassportTransfers;

    // The next id to be issued
    uint256 private _nextSequentialPassportId;

    // Smart contract id in sequencial mode
    bool private _sequencial;

    // A new passport has been created
    event Create(address indexed wallet, uint256 passportId, string source);

    // A passport has been tranfered
    event Transfer(uint256 oldPassportId, uint256 newPassportId, address indexed oldWallet, address indexed newWallet);

    // A passport has been deactivated
    event Deactivate(address indexed wallet, uint256 passportId);

    // A passport has been activated
    event Activate(address indexed wallet, uint256 passportId);

    // Passport generation mode changed
    event PassportGenerationChanged(bool sequencial, uint256 nextSequencialPassportId);

    // Transfer request initiated
    event TransferRequested(address indexed fromWallet, address indexed toWallet, uint256 passportId);

    // Transfer request accepted
    event TransferAccepted(address indexed fromWallet, address indexed toWallet, uint256 passportId);

    // Transfer request revoked
    event TransferRevoked(address indexed wallet, uint256 passportId);

    mapping(uint256 => address) public transferRequests;

    /**
     * @dev Modifier to make a function callable only when the contract is in sequencial mode.
     *
     * Requirements:
     *
     * - The contract must be in sequencial mode.
     */
    modifier whenSequencialGeneration() {
        require(sequencial(), "Admin generation mode");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is in admin generation mode.
     *
     * Requirements:
     *
     * - The contract must be in admin generation mode.
     */
    modifier whenAdminGeneration() {
        require(!sequencial(), "Sequencial generation mode");
        _;
    }

    constructor(address initialOwner) Ownable(initialOwner) {
        _sequencial = false;
    }

    /**
     * @notice Creates a new passport with the next sequential ID.
     * @dev Can only be called when the contract is in sequential generation mode and not paused.
     * @param source The source of the passport creation.
     */
    function create(string memory source) public whenNotPaused whenSequencialGeneration {
        require(passportId[msg.sender] == 0, "Passport already exists");

        totalSequencialCreates++;

        _create(msg.sender, _nextSequentialPassportId, source);
        _nextSequentialPassportId += 1;
    }

    /**
     * @notice Creates a new passport with a specified ID for a specific wallet.
     * @dev Can only be called by the owner when the contract is in admin generation mode and not paused.
     * @param source The source of the passport creation.
     * @param wallet The address of the wallet to associate with the new passport.
     * @param id The ID to assign to the new passport.
     */
    function adminCreate(
        string memory source,
        address wallet,
        uint256 id
    ) public onlyOwner whenNotPaused whenAdminGeneration {
        require(passportId[wallet] == 0, "Passport already exists");

        totalAdminsCreates++;

        _create(wallet, id, source);
    }

    /**
     * @notice Transfers the passport ID of the msg.sender to the new wallet.
     * @dev Can only be called by the passport owner and when the contract is not paused.
     * @param newWallet The address of the new wallet to transfer the passport to.
     */
    function transfer(address newWallet) public whenNotPaused {
        uint256 id = passportId[msg.sender];
        require(newWallet != msg.sender, "You can not transfer to yourself");
        require(newWallet != address(0), "You can not transfer to zero address");
        require(id != 0, "Passport does not exist");
        require(passportId[newWallet] == 0, "Wallet passed already has a passport");
        require(transferRequests[id] == address(0), "Pending transfer already exists for this passport ID");

        transferRequests[id] = newWallet;

        emit TransferRequested(msg.sender, newWallet, id);
    }

    /**
     * @notice Accepts a pending passport transfer to the msg.sender's wallet.
     * @dev Can be called by the new wallet to accept the transfer.
     */
    function acceptTransfer(uint256 _passportId) public whenNotPaused {
        address newWallet = transferRequests[_passportId];
        require(newWallet == msg.sender, "You are not authorized to accept this transfer");

        address oldWallet = idPassport[_passportId];
        require(oldWallet != address(0), "Passport does not exist");

        passportId[oldWallet] = 0;
        passportId[newWallet] = _passportId;
        idPassport[_passportId] = newWallet;
        walletActive[oldWallet] = false;
        walletActive[newWallet] = true;
        totalPassportTransfers++;

        delete transferRequests[_passportId];

        emit TransferAccepted(oldWallet, newWallet, _passportId);
        emit Transfer(_passportId, _passportId, oldWallet, newWallet);
    }

    /**
     * @notice Revokes a pending passport transfer.
     * @dev Can only be called by the passport owner and when the contract is not paused.
     * @param _passportId The ID of the passport for which to revoke the transfer.
     */
    function revokeTransfer(uint256 _passportId) public whenNotPaused {
        address owner = idPassport[_passportId];
        require(owner == msg.sender, "You are not the owner of this passport");
        require(transferRequests[_passportId] != address(0), "No pending transfer to revoke");

        delete transferRequests[_passportId];

        emit TransferRevoked(msg.sender, _passportId);
    }

    // Admin

    /**
     * @notice Transfers the passport ID from one wallet to another.
     * @dev Can only be called by the owner (aka admin).
     * @param wallet The address of the wallet to transfer the passport from.
     * @param id The new passport ID to assign to the wallet.
     */
    function adminTransfer(address wallet, uint256 id) public onlyOwner {
        uint256 oldId = passportId[wallet];
        address idOwner = idPassport[id];
        require(oldId != 0, "Wallet does not have a passport to transfer from");
        require(idOwner == address(0), "New passport id already has a owner");

        string memory source = idSource[oldId];
        idSource[id] = source;
        idSource[oldId] = "";
        passportId[wallet] = id;
        idPassport[oldId] = address(0);
        walletActive[wallet] = true;
        idActive[id] = true;
        idActive[oldId] = false;

        totalPassportTransfers++;

        emit Transfer(oldId, id, wallet, wallet);
    }

    /**
     * @notice Activates the passport with the given passport ID.
     * @dev Can only be called by the owner when the contract is not paused.
     * @param _passportId The ID of the passport to activate.
     */
    function activate(uint256 _passportId) public whenNotPaused onlyOwner {
        address wallet = idPassport[_passportId];
        require(wallet != address(0), "Passport must exist");
        require(walletActive[wallet] == false, "Passport must be inactive");

        walletActive[wallet] = true;
        idActive[_passportId] = true;

        // emit event
        emit Activate(wallet, _passportId);
    }

    /**
     * @notice Deactivates the passport with the given passport ID.
     * @dev Can only be called by the owner when the contract is not paused.
     * @param _passportId The ID of the passport to deactivate.
     */
    function deactivate(uint256 _passportId) public whenNotPaused onlyOwner {
        address wallet = idPassport[_passportId];
        require(wallet != address(0), "Passport must exist");
        require(walletActive[wallet] == true, "Passport must be active");

        walletActive[wallet] = false;
        idActive[_passportId] = false;

        // emit event
        emit Deactivate(wallet, _passportId);
    }

    /**
     * @notice Pauses the contract, disabling future creations.
     * @dev Can only be called by the owner.
     */
    function pause() public whenNotPaused onlyOwner {
        _pause();
    }

    /**
     * @notice Enables the contract, enabling new creations.
     * @dev Can only be called by the owner.
     */
    function unpause() public whenPaused onlyOwner {
        _unpause();
    }

    /**
     * @notice Changes the contract generation mode.
     * @dev Can only be called by the owner.
     * @param sequentialFlag Set to true for sequential generation mode, false for admin generation mode.
     * @param nextSequentialPassportId The next sequential passport ID to be issued.
     */
    function setGenerationMode(bool sequentialFlag, uint256 nextSequentialPassportId) public onlyOwner {
        _sequencial = sequentialFlag;
        _nextSequentialPassportId = nextSequentialPassportId;

        emit PassportGenerationChanged(sequentialFlag, nextSequentialPassportId);
    }

    /**
     * @dev Returns true if the contract is in sequencial mode, and false otherwise.
     */
    function sequencial() public view virtual returns (bool) {
        return _sequencial;
    }

    /**
     * @dev Returns the next id to be generated.
     */
    function nextId() public view virtual returns (uint256) {
        return _nextSequentialPassportId;
    }

    // private

    /**
     * @dev Creates a new passport with the given ID for the specified wallet.
     * @param wallet The address of the wallet to associate with the new passport.
     * @param id The ID to assign to the new passport.
     * @param source The source of the passport creation.
     */
    function _create(address wallet, uint256 id, string memory source) private {
        require(idPassport[id] == address(0), "Passport id already issued");

        totalCreates++;

        idPassport[id] = wallet;
        passportId[wallet] = id;
        walletActive[wallet] = true;
        idActive[id] = true;
        idSource[id] = source;
        
        uint256 result = sourcePassports[source] + 1;
        sourcePassports[source] = result;

        emit Create(wallet, id, source);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

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

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

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

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)

pragma solidity ^0.8.20;

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

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

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)

pragma solidity ^0.8.20;

/**
 * @dev Standard math utilities missing in the Solidity language.
 */
library Math {
    /**
     * @dev Muldiv operation overflow.
     */
    error MathOverflowedMulDiv();

    enum Rounding {
        Floor, // Toward negative infinity
        Ceil, // Toward positive infinity
        Trunc, // Toward zero
        Expand // Away from zero
    }

    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

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

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // 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.
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            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.
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a > b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow.
        return (a & b) + (a ^ b) / 2;
    }

    /**
     * @dev Returns the ceiling of the division of two numbers.
     *
     * This differs from standard division with `/` in that it rounds towards infinity instead
     * of rounding towards zero.
     */
    function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
        if (b == 0) {
            // Guarantee the same behavior as in a regular Solidity division.
            return a / b;
        }

        // (a + b - 1) / b can overflow on addition, so we distribute.
        return a == 0 ? 0 : (a - 1) / b + 1;
    }

    /**
     * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
     * denominator == 0.
     * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
     * Uniswap Labs also under MIT license.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
        unchecked {
            // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
            // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
            // variables such that product = prod1 * 2^256 + prod0.
            uint256 prod0 = x * y; // Least significant 256 bits of the product
            uint256 prod1; // Most significant 256 bits of the product
            assembly {
                let mm := mulmod(x, y, not(0))
                prod1 := sub(sub(mm, prod0), lt(mm, prod0))
            }

            // Handle non-overflow cases, 256 by 256 division.
            if (prod1 == 0) {
                // Solidity will revert if denominator == 0, unlike the div opcode on its own.
                // The surrounding unchecked block does not change this fact.
                // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
                return prod0 / denominator;
            }

            // Make sure the result is less than 2^256. Also prevents denominator == 0.
            if (denominator <= prod1) {
                revert MathOverflowedMulDiv();
            }

            ///////////////////////////////////////////////
            // 512 by 256 division.
            ///////////////////////////////////////////////

            // Make division exact by subtracting the remainder from [prod1 prod0].
            uint256 remainder;
            assembly {
                // Compute remainder using mulmod.
                remainder := mulmod(x, y, denominator)

                // Subtract 256 bit number from 512 bit number.
                prod1 := sub(prod1, gt(remainder, prod0))
                prod0 := sub(prod0, remainder)
            }

            // Factor powers of two out of denominator and compute largest power of two divisor of denominator.
            // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.

            uint256 twos = denominator & (0 - denominator);
            assembly {
                // Divide denominator by twos.
                denominator := div(denominator, twos)

                // Divide [prod1 prod0] by twos.
                prod0 := div(prod0, twos)

                // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
                twos := add(div(sub(0, twos), twos), 1)
            }

            // Shift in bits from prod1 into prod0.
            prod0 |= prod1 * twos;

            // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
            // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
            // four bits. That is, denominator * inv = 1 mod 2^4.
            uint256 inverse = (3 * denominator) ^ 2;

            // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
            // works in modular arithmetic, doubling the correct bits in each step.
            inverse *= 2 - denominator * inverse; // inverse mod 2^8
            inverse *= 2 - denominator * inverse; // inverse mod 2^16
            inverse *= 2 - denominator * inverse; // inverse mod 2^32
            inverse *= 2 - denominator * inverse; // inverse mod 2^64
            inverse *= 2 - denominator * inverse; // inverse mod 2^128
            inverse *= 2 - denominator * inverse; // inverse mod 2^256

            // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
            // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
            // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
            // is no longer required.
            result = prod0 * inverse;
            return result;
        }
    }

    /**
     * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
     */
    function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
        uint256 result = mulDiv(x, y, denominator);
        if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {
            result += 1;
        }
        return result;
    }

    /**
     * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
     * towards zero.
     *
     * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
     */
    function sqrt(uint256 a) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
        //
        // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
        // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
        //
        // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
        // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
        // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
        //
        // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
        uint256 result = 1 << (log2(a) >> 1);

        // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
        // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
        // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
        // into the expected uint128 result.
        unchecked {
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            result = (result + a / result) >> 1;
            return min(result, a / result);
        }
    }

    /**
     * @notice Calculates sqrt(a), following the selected rounding direction.
     */
    function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = sqrt(a);
            return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 2 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log2(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 128;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 64;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 32;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 16;
            }
            if (value >> 8 > 0) {
                value >>= 8;
                result += 8;
            }
            if (value >> 4 > 0) {
                value >>= 4;
                result += 4;
            }
            if (value >> 2 > 0) {
                value >>= 2;
                result += 2;
            }
            if (value >> 1 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 2, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log2(value);
            return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 10 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     */
    function log10(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >= 10 ** 64) {
                value /= 10 ** 64;
                result += 64;
            }
            if (value >= 10 ** 32) {
                value /= 10 ** 32;
                result += 32;
            }
            if (value >= 10 ** 16) {
                value /= 10 ** 16;
                result += 16;
            }
            if (value >= 10 ** 8) {
                value /= 10 ** 8;
                result += 8;
            }
            if (value >= 10 ** 4) {
                value /= 10 ** 4;
                result += 4;
            }
            if (value >= 10 ** 2) {
                value /= 10 ** 2;
                result += 2;
            }
            if (value >= 10 ** 1) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 10, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log10(value);
            return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
        }
    }

    /**
     * @dev Return the log in base 256 of a positive value rounded towards zero.
     * Returns 0 if given 0.
     *
     * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
     */
    function log256(uint256 value) internal pure returns (uint256) {
        uint256 result = 0;
        unchecked {
            if (value >> 128 > 0) {
                value >>= 128;
                result += 16;
            }
            if (value >> 64 > 0) {
                value >>= 64;
                result += 8;
            }
            if (value >> 32 > 0) {
                value >>= 32;
                result += 4;
            }
            if (value >> 16 > 0) {
                value >>= 16;
                result += 2;
            }
            if (value >> 8 > 0) {
                result += 1;
            }
        }
        return result;
    }

    /**
     * @dev Return the log in base 256, following the selected rounding direction, of a positive value.
     * Returns 0 if given 0.
     */
    function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
        unchecked {
            uint256 result = log256(value);
            return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
        }
    }

    /**
     * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
     */
    function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
        return uint8(rounding) % 2 == 1;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Pausable.sol)

pragma solidity ^0.8.20;

import {Context} from "../utils/Context.sol";

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    bool private _paused;

    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    /**
     * @dev The operation failed because the contract is paused.
     */
    error EnforcedPause();

    /**
     * @dev The operation failed because the contract is not paused.
     */
    error ExpectedPause();

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() {
        _paused = false;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        _requireNotPaused();
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        _requirePaused();
        _;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual returns (bool) {
        return _paused;
    }

    /**
     * @dev Throws if the contract is paused.
     */
    function _requireNotPaused() internal view virtual {
        if (paused()) {
            revert EnforcedPause();
        }
    }

    /**
     * @dev Throws if the contract is not paused.
     */
    function _requirePaused() internal view virtual {
        if (!paused()) {
            revert ExpectedPause();
        }
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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ity":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"passportId","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_passportId","type":"uint256"}],"name":"revokeTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"sequencial","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"sequentialFlag","type":"bool"},{"internalType":"uint256","name":"nextSequentialPassportId","type":"uint256"}],"name":"setGenerationMode","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"","type":"string"}],"name":"sourcePassports","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalAdminsCreates","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalCreates","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalPassportTransfers","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSequencialCreates","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newWallet","type":"address"}],"name":"transfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"transferRequests","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"walletActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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0000000000000000000000003c16c7092fe83d874bc4dd52c3b51510c69f1d7b

-----Decoded View---------------
Arg [0] : initialOwner (address): 0x3C16C7092FE83d874BC4dd52c3b51510C69F1D7b

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000003c16c7092fe83d874bc4dd52c3b51510c69f1d7b