Contract 0xacf63e56fd08970b43401492a02f6f38b6635c91 7

Txn Hash Method
Block
From
To
Value [Txn Fee]
0x17e0c1425ec743b8e52264c695fb49335de0c889ca00c8b2b5e29b2b3311af12Set Approval For...256703802023-01-31 23:41:2722 hrs 40 mins ago0x63fa332bf64092b92e098917ddaff8d42c76397c IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0xb95b3b8602495b3e06074a43eb83a1436164b8f497f797c7a3766526399f08acSet Approval For...256695722023-01-31 23:14:1823 hrs 7 mins ago0x68f3deedc85968ed6914672cb71e383bf463c1c1 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0xca58ca5873f9acfaa6edbf2f9c90fd118af9c94f1f35d4667defd6444e2c8e93Set Approval For...256293532023-01-31 0:15:311 day 22 hrs ago0x79f0f1fb9353f4846f230f82873e904340c03964 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.00124231116 26.94
0x12e29b17da4b9f920bb109a3b62a7126f7af4d99315e71579a4a4dcc29039cabSet Approval For...255819382023-01-29 21:42:293 days 39 mins ago0xc4f6a96846fcc8e773158e34d166a40b3bc19898 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001245078 27
0x179ca9b174719af8b7d017c52e752062ee57a2a6d310d4b44a67d890542ca6b4Safe Transfer Fr...255719912023-01-29 16:08:393 days 6 hrs ago0x360aaa1c56ed85601833cf38028e11195a5c15a0 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.00175813227
0x085e3215707f11d54825e5bb3cad9f60ec728f0f2b0588457be65a384f77ab38Set Approval For...255716072023-01-29 15:55:403 days 6 hrs ago0x10d97df0e98ac766ece1e039dbe5332e3e922f11 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0xdc6cd782616b3e1c388e33fb353d4a99d01de13b9ffc92d1f166f7078aa93bb5Set Approval For...255100062023-01-28 5:10:004 days 17 hrs ago0xb695e37b66788a8d632bd4987d05fe4777dd4dbc IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001258250984 27.23604885
0xc5a8743710105afdb4c2454a50e11f1b42555bce49162de1862c3d6d811f731aSet Approval For...253429402023-01-24 6:32:448 days 15 hrs ago0xc4d077863cb04ef988c7e5f8dcbbffa942791718 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.00124231116 26.94
0xb06e40ee6197222035f47849dd153be5d0c2a70f9ca7d6c0960efd945b4742a3Set Approval For...253410642023-01-24 5:27:008 days 16 hrs ago0xa91c62847769f2225c92795e691c9b7eef8235c6 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.00126467645 27.425
0x728805cb9564d24eae62bea558f5711aa3658fe3ed577003c20ed0c3924623dbSet Approval For...253267342023-01-23 21:24:369 days 57 mins ago0xe30dc54f7dac3918d0d231594b9d63815ff9dc9f IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001264739547 27.3765
0x3e8690f4c5a4040753606c23156ed18b270ebb54603629ef257acf6505fc5143Set Approval For...253052442023-01-23 9:14:129 days 13 hrs ago0x3d93bfabce5e125270f51f219a247658365a09c6 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0x891af67c9de9323d830a723f731165046ef3bb69e1d402e3b07c9ac85ebf6560Set Approval For...252729722023-01-22 14:57:5910 days 7 hrs ago0x88156facf7c584bf658badba8bf4d17af6fb150e IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0xa1c7587687bb7f33ba6b01cfe0b24819d329752c564f334721536ebeae34571cSet Approval For...252609032023-01-22 8:08:2210 days 14 hrs ago0xeeff350d770e780bf4125275e1c3ab7977d3ad16 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.00126698015 27.425
0x42693b2ac6e5ef8ccf81e8ae2f72d3d03c6aa29469696748f54c51352b5d2eceSafe Transfer Fr...252607122023-01-22 8:01:4610 days 14 hrs ago0x4c92cbea0286b559fef5a66f1f185239a845b0b3 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001773758463 27.213232025
0x41111d279d09e644895ed1631d18752d90b56667b3f7d6a1fb9a9976ec3ce59cSet Approval For...252490372023-01-22 1:20:2610 days 21 hrs ago0xa1c51c3b495a6a3954eb2f1d32bddabac2daffd4 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001287189823 27.862457757
0x421ccaed6ffd5c7a2c9f166811ea171cc72e77847bcd712fd67c104b52d5e166Set Approval For...252480272023-01-22 0:46:3410 days 21 hrs ago0x66716464ba5467b79aacd959fed37bebdced73d6 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001263619245 27.35225
0x156efefe14e6e00483f4472bc5f47bd645abb19a38e594c0807968a8eece4b85Set Approval For...252411582023-01-21 20:55:4911 days 1 hr ago0x503972b5063ac4d8f69831583fcb97a837e8b719 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001227364751 26.567486718
0x9316b063f1683ddfcb25dbd01c27d36b1a6de96d4da3ae73a0b4d7143cd52b7dSet Approval For...252062292023-01-21 0:53:5911 days 21 hrs ago0x503972b5063ac4d8f69831583fcb97a837e8b719 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001222021 26.5
0x44c40500d571737a13e854bcf90c685948ae344638a5a691774d8bd212a02986Set Approval For...251730442023-01-20 6:17:2412 days 16 hrs ago0x4bd9869c842e06b2f459fbd6b9c6f8bd5753a6ab IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0x3905d4e0c7b7333fc3ddd03395a7692811c7c6f5ad2428dcd213f373e2857399Set Approval For...251042922023-01-18 15:09:4814 days 7 hrs ago0xee650f5599bd48f27b29b254a4c45322a755c6b4 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0x90592f8655730a30f316b71aa7ef3e41e6b6c99bbde8a27279b06126747d04faSet Approval For...251042242023-01-18 15:07:2814 days 7 hrs ago0x5f3cfa4623ef040d2fcafd39cc79001d4ee7da00 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001239627325 26.8818
0x91dde75416726e9652e1ef81f0b4415a0ac08ad3efbf7e51d450030e285bfdcbSet Approval For...250766512023-01-17 23:21:5114 days 23 hrs ago0xb03c555a1868ddd48c12b8215c4d82acd6accfd7 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001224247 26.5
0x2daed9e21a0bfb8cae1ba1b73bbb53ed5a060161d1159963195d3fedd4203276Set Approval For...250759102023-01-17 22:56:4014 days 23 hrs ago0x26d64eb85967112c96f55ec6cdbe826ae467b9ca IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.00127044527.5
0x0bc3d0cfa595ce4deba290f2691aee5ac6a98cbcf0adafd59e05dd37a7941f38Transfer From250757452023-01-17 22:51:0314 days 23 hrs ago0xdc5f05c7235244b9697c4b320a5f39ffcfa1acf5 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.001240662527.5
0x3484cc86fba0573a1f2079d9ea43d2a526ba30bae7ee5c00d3bee18230e3ba27Set Approval For...250329382023-01-16 22:28:2615 days 23 hrs ago0xe675d3d48bccfe403f4e10b7b6b65970e4e63ca7 IN  0xacf63e56fd08970b43401492a02f6f38b6635c910 AVAX0.00126813527.5
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Latest 25 internal transaction
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0x6d02f99f9ae05a1d3a4e82bfa01d34415e4b3b4890493d279c61bed18be9cfa3256709392023-02-01 0:00:1322 hrs 21 mins ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.3424754324559694 AVAX
0x6d02f99f9ae05a1d3a4e82bfa01d34415e4b3b4890493d279c61bed18be9cfa3256709392023-02-01 0:00:1322 hrs 21 mins ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.3424754324559694 AVAX
0x6d02f99f9ae05a1d3a4e82bfa01d34415e4b3b4890493d279c61bed18be9cfa3256709392023-02-01 0:00:1322 hrs 21 mins ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.3424754324559694 AVAX
0x6d02f99f9ae05a1d3a4e82bfa01d34415e4b3b4890493d279c61bed18be9cfa3256709392023-02-01 0:00:1322 hrs 21 mins ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.3424754324559694 AVAX
0x6d02f99f9ae05a1d3a4e82bfa01d34415e4b3b4890493d279c61bed18be9cfa3256709392023-02-01 0:00:1322 hrs 21 mins ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.3424754324559694 AVAX
0x6d02f99f9ae05a1d3a4e82bfa01d34415e4b3b4890493d279c61bed18be9cfa3256709392023-02-01 0:00:1322 hrs 21 mins ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.3424754324559694 AVAX
0x12da54669f57901f937390e3da9f10cb667190f73a7a838ca0ed23c31bc367bd256699572023-01-31 23:27:1522 hrs 54 mins ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.444614139635353507 AVAX
0x12da54669f57901f937390e3da9f10cb667190f73a7a838ca0ed23c31bc367bd256699572023-01-31 23:27:1522 hrs 54 mins ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.444614139635353507 AVAX
0x01f379818f72cb917a9085a4b3418bf995a55c57d54fbd005988fcb3bd1b754d255101532023-01-28 5:14:584 days 17 hrs ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint0.758023055770001835 AVAX
0x01f379818f72cb917a9085a4b3418bf995a55c57d54fbd005988fcb3bd1b754d255101532023-01-28 5:14:584 days 17 hrs ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c910.758023055770001835 AVAX
0x6e3f37eb34a8d103bdb6b74eb9558b6beff9f4e86e1b6109ef262c91073105bf253268502023-01-23 21:28:329 days 53 mins ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.015577256274802426 AVAX
0x6e3f37eb34a8d103bdb6b74eb9558b6beff9f4e86e1b6109ef262c91073105bf253268502023-01-23 21:28:329 days 53 mins ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.015577256274802426 AVAX
0x6e3f37eb34a8d103bdb6b74eb9558b6beff9f4e86e1b6109ef262c91073105bf253268502023-01-23 21:28:329 days 53 mins ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.015577256274802426 AVAX
0x6e3f37eb34a8d103bdb6b74eb9558b6beff9f4e86e1b6109ef262c91073105bf253268502023-01-23 21:28:329 days 53 mins ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.015577256274802426 AVAX
0x2690c4581ebe9acb0718d6dfded30e9f0108d55df38b6d5cda5f106d56a10536253052572023-01-23 9:14:419 days 13 hrs ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint0.852481989982561481 AVAX
0x2690c4581ebe9acb0718d6dfded30e9f0108d55df38b6d5cda5f106d56a10536253052572023-01-23 9:14:419 days 13 hrs ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c910.852481989982561481 AVAX
0x7b87941677a2cb4e1195ed6a6f5476a9f67df9fab35858fda773d6570277c8bd252733132023-01-22 15:08:5310 days 7 hrs ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.154763246999970011 AVAX
0x7b87941677a2cb4e1195ed6a6f5476a9f67df9fab35858fda773d6570277c8bd252733132023-01-22 15:08:5310 days 7 hrs ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.154763246999970011 AVAX
0x7b87941677a2cb4e1195ed6a6f5476a9f67df9fab35858fda773d6570277c8bd252733132023-01-22 15:08:5310 days 7 hrs ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint1.154763246999970011 AVAX
0x7b87941677a2cb4e1195ed6a6f5476a9f67df9fab35858fda773d6570277c8bd252733132023-01-22 15:08:5310 days 7 hrs ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c911.154763246999970011 AVAX
0x5b5ac686baa61fadc351810208f1fc5e81521d21987b086e357b24de3c2a8125252534602023-01-22 3:48:4510 days 18 hrs ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint0.001749515573687775 AVAX
0x5b5ac686baa61fadc351810208f1fc5e81521d21987b086e357b24de3c2a8125252534602023-01-22 3:48:4510 days 18 hrs ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c910.001749515573687775 AVAX
0x5b5ac686baa61fadc351810208f1fc5e81521d21987b086e357b24de3c2a8125252534602023-01-22 3:48:4510 days 18 hrs ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint0.001749515573687775 AVAX
0x5b5ac686baa61fadc351810208f1fc5e81521d21987b086e357b24de3c2a8125252534602023-01-22 3:48:4510 days 18 hrs ago 0x37b1da8843bdd75e9b3f4cbbc66e45fa50c4e1b7 0xacf63e56fd08970b43401492a02f6f38b6635c910.001749515573687775 AVAX
0xe0dd2175a5d7d9360a97dfa58470569429cdad9048bc1c3d2f24a234c190f527252489412023-01-22 1:17:1210 days 21 hrs ago 0xacf63e56fd08970b43401492a02f6f38b6635c91 LayerZero: Avalanche Endpoint0.974106881788365267 AVAX
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Contract Source Code Verified (Exact Match)

Contract Name:
ONFT

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 30000 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity Standard Json-Input format)

File 1 of 22 : 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 2 of 22 : Pausable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../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 {
    /**
     * @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);

    bool private _paused;

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

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

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

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

    /**
     * @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());
    }
}

File 3 of 22 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // 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 4 of 22 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

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

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

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

    /**
     * @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 5 of 22 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

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

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

    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'
        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) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _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
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 6 of 22 : ERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC721/ERC721.sol)

pragma solidity ^0.8.0;

import "./IERC721.sol";
import "./IERC721Receiver.sol";
import "./extensions/IERC721Metadata.sol";
import "../../utils/Address.sol";
import "../../utils/Context.sol";
import "../../utils/Strings.sol";
import "../../utils/introspection/ERC165.sol";

/**
 * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
 * the Metadata extension, but not including the Enumerable extension, which is available separately as
 * {ERC721Enumerable}.
 */
contract ERC721 is Context, ERC165, IERC721, IERC721Metadata {
    using Address for address;
    using Strings for uint256;

    // Token name
    string private _name;

    // Token symbol
    string private _symbol;

    // Mapping from token ID to owner address
    mapping(uint256 => address) private _owners;

    // Mapping owner address to token count
    mapping(address => uint256) private _balances;

    // Mapping from token ID to approved address
    mapping(uint256 => address) private _tokenApprovals;

    // Mapping from owner to operator approvals
    mapping(address => mapping(address => bool)) private _operatorApprovals;

    /**
     * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
     */
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return
            interfaceId == type(IERC721).interfaceId ||
            interfaceId == type(IERC721Metadata).interfaceId ||
            super.supportsInterface(interfaceId);
    }

    /**
     * @dev See {IERC721-balanceOf}.
     */
    function balanceOf(address owner) public view virtual override returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");
        return _balances[owner];
    }

    /**
     * @dev See {IERC721-ownerOf}.
     */
    function ownerOf(uint256 tokenId) public view virtual override returns (address) {
        address owner = _owners[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");
        return owner;
    }

    /**
     * @dev See {IERC721Metadata-name}.
     */
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    /**
     * @dev See {IERC721Metadata-symbol}.
     */
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

    /**
     * @dev See {IERC721Metadata-tokenURI}.
     */
    function tokenURI(uint256 tokenId) public view virtual override returns (string memory) {
        require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token");

        string memory baseURI = _baseURI();
        return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : "";
    }

    /**
     * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
     * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
     * by default, can be overriden in child contracts.
     */
    function _baseURI() internal view virtual returns (string memory) {
        return "";
    }

    /**
     * @dev See {IERC721-approve}.
     */
    function approve(address to, uint256 tokenId) public virtual override {
        address owner = ERC721.ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(
            _msgSender() == owner || isApprovedForAll(owner, _msgSender()),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _approve(to, tokenId);
    }

    /**
     * @dev See {IERC721-getApproved}.
     */
    function getApproved(uint256 tokenId) public view virtual override returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev See {IERC721-setApprovalForAll}.
     */
    function setApprovalForAll(address operator, bool approved) public virtual override {
        _setApprovalForAll(_msgSender(), operator, approved);
    }

    /**
     * @dev See {IERC721-isApprovedForAll}.
     */
    function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev See {IERC721-transferFrom}.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");

        _transfer(from, to, tokenId);
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) public virtual override {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev See {IERC721-safeTransferFrom}.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) public virtual override {
        require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved");
        _safeTransfer(from, to, tokenId, _data);
    }

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * `_data` is additional data, it has no specified format and it is sent in call to `to`.
     *
     * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g.
     * implement alternative mechanisms to perform token transfer, such as signature-based.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeTransfer(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _transfer(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether `tokenId` exists.
     *
     * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}.
     *
     * Tokens start existing when they are minted (`_mint`),
     * and stop existing when they are burned (`_burn`).
     */
    function _exists(uint256 tokenId) internal view virtual returns (bool) {
        return _owners[tokenId] != address(0);
    }

    /**
     * @dev Returns whether `spender` is allowed to manage `tokenId`.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ERC721.ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Safely mints `tokenId` and transfers it to `to`.
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function _safeMint(address to, uint256 tokenId) internal virtual {
        _safeMint(to, tokenId, "");
    }

    /**
     * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
     * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
     */
    function _safeMint(
        address to,
        uint256 tokenId,
        bytes memory _data
    ) internal virtual {
        _mint(to, tokenId);
        require(
            _checkOnERC721Received(address(0), to, tokenId, _data),
            "ERC721: transfer to non ERC721Receiver implementer"
        );
    }

    /**
     * @dev Mints `tokenId` and transfers it to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
     *
     * Requirements:
     *
     * - `tokenId` must not exist.
     * - `to` cannot be the zero address.
     *
     * Emits a {Transfer} event.
     */
    function _mint(address to, uint256 tokenId) internal virtual {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _beforeTokenTransfer(address(0), to, tokenId);

        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(address(0), to, tokenId);

        _afterTokenTransfer(address(0), to, tokenId);
    }

    /**
     * @dev Destroys `tokenId`.
     * The approval is cleared when the token is burned.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     *
     * Emits a {Transfer} event.
     */
    function _burn(uint256 tokenId) internal virtual {
        address owner = ERC721.ownerOf(tokenId);

        _beforeTokenTransfer(owner, address(0), tokenId);

        // Clear approvals
        _approve(address(0), tokenId);

        _balances[owner] -= 1;
        delete _owners[tokenId];

        emit Transfer(owner, address(0), tokenId);

        _afterTokenTransfer(owner, address(0), tokenId);
    }

    /**
     * @dev Transfers `tokenId` from `from` to `to`.
     *  As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     *
     * Emits a {Transfer} event.
     */
    function _transfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {
        require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner");
        require(to != address(0), "ERC721: transfer to the zero address");

        _beforeTokenTransfer(from, to, tokenId);

        // Clear approvals from the previous owner
        _approve(address(0), tokenId);

        _balances[from] -= 1;
        _balances[to] += 1;
        _owners[tokenId] = to;

        emit Transfer(from, to, tokenId);

        _afterTokenTransfer(from, to, tokenId);
    }

    /**
     * @dev Approve `to` to operate on `tokenId`
     *
     * Emits a {Approval} event.
     */
    function _approve(address to, uint256 tokenId) internal virtual {
        _tokenApprovals[tokenId] = to;
        emit Approval(ERC721.ownerOf(tokenId), to, tokenId);
    }

    /**
     * @dev Approve `operator` to operate on all of `owner` tokens
     *
     * Emits a {ApprovalForAll} event.
     */
    function _setApprovalForAll(
        address owner,
        address operator,
        bool approved
    ) internal virtual {
        require(owner != operator, "ERC721: approve to caller");
        _operatorApprovals[owner][operator] = approved;
        emit ApprovalForAll(owner, operator, approved);
    }

    /**
     * @dev Internal function to invoke {IERC721Receiver-onERC721Received} on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(
        address from,
        address to,
        uint256 tokenId,
        bytes memory _data
    ) private returns (bool) {
        if (to.isContract()) {
            try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) {
                return retval == IERC721Receiver.onERC721Received.selector;
            } catch (bytes memory reason) {
                if (reason.length == 0) {
                    revert("ERC721: transfer to non ERC721Receiver implementer");
                } else {
                    assembly {
                        revert(add(32, reason), mload(reason))
                    }
                }
            }
        } else {
            return true;
        }
    }

    /**
     * @dev Hook that is called before any token transfer. This includes minting
     * and burning.
     *
     * Calling conditions:
     *
     * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be
     * transferred to `to`.
     * - When `from` is zero, `tokenId` will be minted for `to`.
     * - When `to` is zero, ``from``'s `tokenId` will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}

    /**
     * @dev Hook that is called after any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 tokenId
    ) internal virtual {}
}

File 7 of 22 : IERC721.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;
}

File 8 of 22 : IERC721Receiver.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

File 9 of 22 : IERC721Metadata.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC721.sol";

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
interface IERC721Metadata is IERC721 {
    /**
     * @dev Returns the token collection name.
     */
    function name() external view returns (string memory);

    /**
     * @dev Returns the token collection symbol.
     */
    function symbol() external view returns (string memory);

    /**
     * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
     */
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

File 10 of 22 : 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 11 of 22 : 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;
    }
}

File 12 of 22 : Strings.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

File 13 of 22 : ERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

File 14 of 22 : IERC165.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

File 15 of 22 : LzApp.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./interfaces/ILayerZeroReceiver.sol";
import "./interfaces/ILayerZeroUserApplicationConfig.sol";
import "./interfaces/ILayerZeroEndpoint.sol";

/*
 * a generic LzReceiver implementation
 */
abstract contract LzApp is Ownable, ILayerZeroReceiver, ILayerZeroUserApplicationConfig {
    ILayerZeroEndpoint internal immutable lzEndpoint;

    mapping(uint16 => bytes) internal trustedRemoteLookup;

    event SetTrustedRemote(uint16 _srcChainId, bytes _srcAddress);

    constructor(address _endpoint) {
        lzEndpoint = ILayerZeroEndpoint(_endpoint);
    }

    function lzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) external override {
        // lzReceive must be called by the endpoint for security
        require(_msgSender() == address(lzEndpoint));
        // if will still block the message pathway from (srcChainId, srcAddress). should not receive message from untrusted remote.
        require(_srcAddress.length == trustedRemoteLookup[_srcChainId].length && keccak256(_srcAddress) == keccak256(trustedRemoteLookup[_srcChainId]), "LzReceiver: invalid source sending contract");

        _blockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
    }

    // abstract function - the default behaviour of LayerZero is blocking. See: NonblockingLzApp if you dont need to enforce ordered messaging
    function _blockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual;

    function _lzSend(uint16 _dstChainId, bytes memory _payload, address payable _refundAddress, address _zroPaymentAddress, bytes memory _adapterParam) internal {
        require(trustedRemoteLookup[_dstChainId].length != 0, "LzSend: destination chain is not a trusted source.");
        lzEndpoint.send{value: msg.value}(_dstChainId, trustedRemoteLookup[_dstChainId], _payload, _refundAddress, _zroPaymentAddress, _adapterParam);
    }

    //---------------------------UserApplication config----------------------------------------
    function getConfig(uint16, uint16 _chainId, address, uint _configType) external view returns (bytes memory) {
        return lzEndpoint.getConfig(lzEndpoint.getSendVersion(address(this)), _chainId, address(this), _configType);
    }

    // generic config for LayerZero user Application
    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external override onlyOwner {
        lzEndpoint.setConfig(_version, _chainId, _configType, _config);
    }

    function setSendVersion(uint16 _version) external override onlyOwner {
        lzEndpoint.setSendVersion(_version);
    }

    function setReceiveVersion(uint16 _version) external override onlyOwner {
        lzEndpoint.setReceiveVersion(_version);
    }

    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external override onlyOwner {
        lzEndpoint.forceResumeReceive(_srcChainId, _srcAddress);
    }

    // allow owner to set it multiple times.
    function setTrustedRemote(uint16 _srcChainId, bytes calldata _srcAddress) external onlyOwner {
        trustedRemoteLookup[_srcChainId] = _srcAddress;
        emit SetTrustedRemote(_srcChainId, _srcAddress);
    }

    function isTrustedRemote(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool) {
        bytes memory trustedSource = trustedRemoteLookup[_srcChainId];
        return keccak256(trustedSource) == keccak256(_srcAddress);
    }

    //--------------------------- VIEW FUNCTION ----------------------------------------
    // interacting with the LayerZero Endpoint and remote contracts

    function getTrustedRemote(uint16 _chainId) external view returns (bytes memory) {
        return trustedRemoteLookup[_chainId];
    }

    function getLzEndpoint() external view returns (address) {
        return address(lzEndpoint);
    }
}

File 16 of 22 : NonblockingLzApp.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./LzApp.sol";

/*
 * the default LayerZero messaging behaviour is blocking, i.e. any failed message will block the channel
 * this abstract class try-catch all fail messages and store locally for future retry. hence, non-blocking
 * NOTE: if the srcAddress is not configured properly, it will still block the message pathway from (srcChainId, srcAddress)
 */
abstract contract NonblockingLzApp is LzApp {
    constructor(address _endpoint) LzApp(_endpoint) {}

    mapping(uint16 => mapping(bytes => mapping(uint => bytes32))) public failedMessages;

    event MessageFailed(uint16 _srcChainId, bytes _srcAddress, uint64 _nonce, bytes _payload);

    // overriding the virtual function in LzReceiver
    function _blockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual override {
        // try-catch all errors/exceptions
        try this.nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload) {
            // do nothing
        } catch {
            // error / exception
            failedMessages[_srcChainId][_srcAddress][_nonce] = keccak256(_payload);
            emit MessageFailed(_srcChainId, _srcAddress, _nonce, _payload);
        }
    }

    function nonblockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) public virtual {
        // only internal transaction
        require(_msgSender() == address(this), "LzReceiver: caller must be Bridge.");
        _nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
    }

    //@notice override this function
    function _nonblockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual;

    function retryMessage(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes calldata _payload) external payable virtual {
        // assert there is message to retry
        bytes32 payloadHash = failedMessages[_srcChainId][_srcAddress][_nonce];
        require(payloadHash != bytes32(0), "LzReceiver: no stored message");
        require(keccak256(_payload) == payloadHash, "LzReceiver: invalid payload");
        // clear the stored message
        failedMessages[_srcChainId][_srcAddress][_nonce] = bytes32(0);
        // execute the message. revert if it fails again
        this.nonblockingLzReceive(_srcChainId, _srcAddress, _nonce, _payload);
    }
}

File 17 of 22 : ONFT.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8;

import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";

import "./ONFT721.sol";

contract ONFT is ONFT721, Pausable, ReentrancyGuard {
    using Strings for uint;
    using SafeERC20 for IERC20;

    uint public startMintId;
    uint public immutable endMintId;
    uint public price;
    uint public maxMintQuantity;
    bool public reveal;
    bool public isMintActive;
    string public contractURI;
    string public customName;
    string public customSymbol;
    IERC20 public immutable stableToken;
    mapping(address => uint) public claimed;
    address public feeCollectorAddress;

    /// @notice Constructor for the ONFT
    /// @param _name the name of the token
    /// @param _symbol the token symbol
    /// @param _baseTokenURI the base URI for computing the tokenURI
    /// @param _layerZeroEndpoint handles message transmission across chains
    /// @param _startMintId the starting mint number on this chain
    /// @param _endMintId the max number of mints on this chain
    /// @param _stableTokenAddress the address of the stable contract to pay for mints
    /// @param _stableTokenDecimals the decimals of the stable token
    /// @param _feeCollectorAddress the address fee collector
    constructor(string memory _name, string memory _symbol, string memory _baseTokenURI, address _layerZeroEndpoint, uint _startMintId, uint _endMintId, address _stableTokenAddress, uint _stableTokenDecimals, address _feeCollectorAddress) ONFT721(_name, _symbol, _layerZeroEndpoint) {
        customName = _name;
        customSymbol = _symbol;
        setBaseURI(_baseTokenURI);
        contractURI = _baseTokenURI;
        startMintId = _startMintId;
        endMintId = _endMintId;
        stableToken = IERC20(_stableTokenAddress);
        maxMintQuantity = 3;
        price = 400 * 10**_stableTokenDecimals;
        feeCollectorAddress = _feeCollectorAddress;
    }

    function mint(uint _quantity) external {
        require(isMintActive, "ONFT: Mint is not active.");
        require(claimed[msg.sender] + _quantity <= maxMintQuantity, "ONFT: Max Mint per wallet reached.");
        require(startMintId + _quantity <= endMintId, "ONFT: Max Mint limit reached.");
        stableToken.safeTransferFrom(msg.sender, feeCollectorAddress, price * _quantity);
        claimed[msg.sender] = claimed[msg.sender] + _quantity;
        for (uint i = 1; i <= _quantity; i++) {
            _safeMint(msg.sender, startMintId++);
        }
    }

    function _beforeSend(address, uint16, bytes memory, uint _tokenId) internal override whenNotPaused {
        _burn(_tokenId);
    }

    function pauseSendTokens(bool pause) external onlyOwner {
        pause ? _pause() : _unpause();
    }

    function activateReveal() external onlyOwner {
        reveal = true;
    }

    function tokenURI(uint tokenId) public view override returns (string memory) {
        if (reveal) {
            return string(abi.encodePacked(_baseURI(), tokenId.toString()));
        }
        return _baseURI();
    }

    function activateMint() external onlyOwner {
        isMintActive = true;
    }

    function setFeeCollector(address _feeCollectorAddress) external onlyOwner {
        feeCollectorAddress = _feeCollectorAddress;
    }

    function setMintPrice(uint _price) external onlyOwner {
        price = _price;
    }

    function setMintQuantity(uint _maxMintQuantity) external onlyOwner {
        maxMintQuantity = _maxMintQuantity;
    }

    function setContractURI(string memory _contractURI) public onlyOwner {
        contractURI = _contractURI;
    }

    function setName(string memory name) external onlyOwner {
        customName = name;
    }

    function setSymbol(string memory symbol) external onlyOwner {
        customSymbol = symbol;
    }

    function name() public view virtual override returns (string memory) {
        return customName;
    }

    function symbol() public view virtual override returns (string memory) {
        return customSymbol;
    }
}

File 18 of 22 : ONFT721.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
import "./interfaces/IONFT721.sol";
import "./NonblockingLzApp.sol";

// NOTE: this ONFT contract has no public minting logic.
// must implement your own minting logic in child classes
contract ONFT721 is IONFT721, NonblockingLzApp, ERC721 {
    string public baseTokenURI;

    constructor(string memory _name, string memory _symbol, address _lzEndpoint) ERC721(_name, _symbol) NonblockingLzApp(_lzEndpoint) {}

    function estimateSendFee(uint16 _dstChainId, bytes memory _toAddress, uint _tokenId, bool _payInZRO, bytes calldata _adapterParams) external virtual returns (uint nativeFee, uint _zroFee) {
        bytes memory payload = abi.encode(_toAddress, _tokenId);
        return lzEndpoint.estimateFees(_dstChainId, address(this), payload, _payInZRO, _adapterParams);
    }

    function sendFrom(address _from, uint16 _dstChainId, bytes calldata _toAddress, uint _tokenId, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParam) external payable virtual override {
        _send(_from, _dstChainId, _toAddress, _tokenId, _refundAddress, _zroPaymentAddress, _adapterParam);
    }

    function send(uint16 _dstChainId, bytes calldata _toAddress, uint _tokenId, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParam) external payable virtual override {
        _send(_msgSender(), _dstChainId, _toAddress, _tokenId, _refundAddress, _zroPaymentAddress, _adapterParam);
    }

    function _send(address _from, uint16 _dstChainId, bytes memory _toAddress, uint _tokenId, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParam) internal virtual {
        require(_isApprovedOrOwner(_msgSender(), _tokenId), "ERC721: transfer caller is not owner nor approved");
        _beforeSend(_from, _dstChainId, _toAddress, _tokenId);

        bytes memory payload = abi.encode(_toAddress, _tokenId);
        _lzSend(_dstChainId, payload, _refundAddress, _zroPaymentAddress, _adapterParam);

        uint64 nonce = lzEndpoint.getOutboundNonce(_dstChainId, address(this));
        emit SendToChain(_from, _dstChainId, _toAddress, _tokenId, nonce);
        _afterSend(_from, _dstChainId, _toAddress, _tokenId);
    }

    function _nonblockingLzReceive(uint16 _srcChainId, bytes memory _srcAddress, uint64 _nonce, bytes memory _payload) internal virtual override {
        _beforeReceive(_srcChainId, _srcAddress, _payload);

        // decode and load the toAddress
        (bytes memory toAddress, uint tokenId) = abi.decode(_payload, (bytes, uint));
        address localToAddress;
        assembly {
            localToAddress := mload(add(toAddress, 20))
        }

        // if the toAddress is 0x0, convert to dead address, or it will get cached
        if (localToAddress == address(0x0)) localToAddress == address(0xdEaD);

        _afterReceive(_srcChainId, localToAddress, tokenId);

        emit ReceiveFromChain(_srcChainId, localToAddress, tokenId, _nonce);
    }

    function _beforeSend(
        address, /* _from */
        uint16, /* _dstChainId */
        bytes memory, /* _toAddress */
        uint _tokenId
    ) internal virtual {
        _burn(_tokenId);
    }

    function _afterSend(
        address, /* _from */
        uint16, /* _dstChainId */
        bytes memory, /* _toAddress */
        uint /* _tokenId */
    ) internal virtual {}

    function _beforeReceive(
        uint16, /* _srcChainId */
        bytes memory, /* _srcAddress */
        bytes memory /* _payload */
    ) internal virtual {}

    function _afterReceive(
        uint16, /* _srcChainId */
        address _toAddress,
        uint _tokenId
    ) internal virtual {
        _safeMint(_toAddress, _tokenId);
    }

    function setBaseURI(string memory _baseTokenURI) public onlyOwner {
        baseTokenURI = _baseTokenURI;
    }

    function _baseURI() internal view override returns (string memory) {
        return baseTokenURI;
    }
}

File 19 of 22 : ILayerZeroEndpoint.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

import "./ILayerZeroUserApplicationConfig.sol";

interface ILayerZeroEndpoint is ILayerZeroUserApplicationConfig {
    // @notice send a LayerZero message to the specified address at a LayerZero endpoint.
    // @param _dstChainId - the destination chain identifier
    // @param _destination - the address on destination chain (in bytes). address length/format may vary by chains
    // @param _payload - a custom bytes payload to send to the destination contract
    // @param _refundAddress - if the source transaction is cheaper than the amount of value passed, refund the additional amount to this address
    // @param _zroPaymentAddress - the address of the ZRO token holder who would pay for the transaction
    // @param _adapterParams - parameters for custom functionality. e.g. receive airdropped native gas from the relayer on destination
    function send(uint16 _dstChainId, bytes calldata _destination, bytes calldata _payload, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParams) external payable;

    // @notice used by the messaging library to publish verified payload
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source contract (as bytes) at the source chain
    // @param _dstAddress - the address on destination chain
    // @param _nonce - the unbound message ordering nonce
    // @param _gasLimit - the gas limit for external contract execution
    // @param _payload - verified payload to send to the destination contract
    function receivePayload(uint16 _srcChainId, bytes calldata _srcAddress, address _dstAddress, uint64 _nonce, uint _gasLimit, bytes calldata _payload) external;

    // @notice get the inboundNonce of a lzApp from a source chain which could be EVM or non-EVM chain
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function getInboundNonce(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (uint64);

    // @notice get the outboundNonce from this source chain which, consequently, is always an EVM
    // @param _srcAddress - the source chain contract address
    function getOutboundNonce(uint16 _dstChainId, address _srcAddress) external view returns (uint64);

    // @notice gets a quote in source native gas, for the amount that send() requires to pay for message delivery
    // @param _dstChainId - the destination chain identifier
    // @param _userApplication - the user app address on this EVM chain
    // @param _payload - the custom message to send over LayerZero
    // @param _payInZRO - if false, user app pays the protocol fee in native token
    // @param _adapterParam - parameters for the adapter service, e.g. send some dust native token to dstChain
    function estimateFees(uint16 _dstChainId, address _userApplication, bytes calldata _payload, bool _payInZRO, bytes calldata _adapterParam) external view returns (uint nativeFee, uint zroFee);

    // @notice get this Endpoint's immutable source identifier
    function getChainId() external view returns (uint16);

    // @notice the interface to retry failed message on this Endpoint destination
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    // @param _payload - the payload to be retried
    function retryPayload(uint16 _srcChainId, bytes calldata _srcAddress, bytes calldata _payload) external;

    // @notice query if any STORED payload (message blocking) at the endpoint.
    // @param _srcChainId - the source chain identifier
    // @param _srcAddress - the source chain contract address
    function hasStoredPayload(uint16 _srcChainId, bytes calldata _srcAddress) external view returns (bool);

    // @notice query if the _libraryAddress is valid for sending msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getSendLibraryAddress(address _userApplication) external view returns (address);

    // @notice query if the _libraryAddress is valid for receiving msgs.
    // @param _userApplication - the user app address on this EVM chain
    function getReceiveLibraryAddress(address _userApplication) external view returns (address);

    // @notice query if the non-reentrancy guard for send() is on
    // @return true if the guard is on. false otherwise
    function isSendingPayload() external view returns (bool);

    // @notice query if the non-reentrancy guard for receive() is on
    // @return true if the guard is on. false otherwise
    function isReceivingPayload() external view returns (bool);

    // @notice get the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _userApplication - the contract address of the user application
    // @param _configType - type of configuration. every messaging library has its own convention.
    function getConfig(uint16 _version, uint16 _chainId, address _userApplication, uint _configType) external view returns (bytes memory);

    // @notice get the send() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getSendVersion(address _userApplication) external view returns (uint16);

    // @notice get the lzReceive() LayerZero messaging library version
    // @param _userApplication - the contract address of the user application
    function getReceiveVersion(address _userApplication) external view returns (uint16);
}

File 20 of 22 : ILayerZeroReceiver.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface ILayerZeroReceiver {
    // @notice LayerZero endpoint will invoke this function to deliver the message on the destination
    // @param _srcChainId - the source endpoint identifier
    // @param _srcAddress - the source sending contract address from the source chain
    // @param _nonce - the ordered message nonce
    // @param _payload - the signed payload is the UA bytes has encoded to be sent
    function lzReceive(uint16 _srcChainId, bytes calldata _srcAddress, uint64 _nonce, bytes calldata _payload) external;
}

File 21 of 22 : ILayerZeroUserApplicationConfig.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface ILayerZeroUserApplicationConfig {
    // @notice set the configuration of the LayerZero messaging library of the specified version
    // @param _version - messaging library version
    // @param _chainId - the chainId for the pending config change
    // @param _configType - type of configuration. every messaging library has its own convention.
    // @param _config - configuration in the bytes. can encode arbitrary content.
    function setConfig(uint16 _version, uint16 _chainId, uint _configType, bytes calldata _config) external;

    // @notice set the send() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setSendVersion(uint16 _version) external;

    // @notice set the lzReceive() LayerZero messaging library version to _version
    // @param _version - new messaging library version
    function setReceiveVersion(uint16 _version) external;

    // @notice Only when the UA needs to resume the message flow in blocking mode and clear the stored payload
    // @param _srcChainId - the chainId of the source chain
    // @param _srcAddress - the contract address of the source contract at the source chain
    function forceResumeReceive(uint16 _srcChainId, bytes calldata _srcAddress) external;
}

File 22 of 22 : IONFT721.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

/**
 * @dev Interface of the ONFT standard
 */
interface IONFT721 is IERC721 {
    /**
     * @dev send token `_tokenId` to (`_dstChainId`, `_toAddress`)
     * `_toAddress` can be any size depending on the `dstChainId`.
     * `_zroPaymentAddress` set to address(0x0) if not paying in ZRO (LayerZero Token)
     * `_adapterParam` is a flexible bytes array to indicate messaging adapter services
     */
    function send(uint16 _dstChainId, bytes calldata _toAddress, uint _tokenId, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParam) external payable;

    /**
     * @dev send token `_tokenId` to (`_dstChainId`, `_toAddress`) from `_from`
     * `_toAddress` can be any size depending on the `dstChainId`.
     * `_zroPaymentAddress` set to address(0x0) if not paying in ZRO (LayerZero Token)
     * `_adapterParam` is a flexible bytes array to indicate messaging adapter services
     */
    function sendFrom(address _from, uint16 _dstChainId, bytes calldata _toAddress, uint _tokenId, address payable _refundAddress, address _zroPaymentAddress, bytes calldata _adapterParam) external payable;

    /**
     * @dev Emitted when `_tokenId` are moved from the `_sender` to (`_dstChainId`, `_toAddress`)
     * `_nonce` is the outbound nonce from
     */
    event SendToChain(address indexed _sender, uint16 indexed _dstChainId, bytes indexed _toAddress, uint _tokenId, uint64 _nonce);

    /**
     * @dev Emitted when `_tokenId` are sent from `_srcChainId` to the `_toAddress` at this chain. `_nonce` is the inbound nonce.
     */
    event ReceiveFromChain(uint16 _srcChainId, address _toAddress, uint _tokenId, uint64 _nonce);
}

Settings
{
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs",
    "useLiteralContent": true
  },
  "optimizer": {
    "enabled": true,
    "runs": 30000
  },
  "remappings": [],
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract ABI

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puts":[{"internalType":"uint16","name":"_dstChainId","type":"uint16"},{"internalType":"bytes","name":"_toAddress","type":"bytes"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"bool","name":"_payInZRO","type":"bool"},{"internalType":"bytes","name":"_adapterParams","type":"bytes"}],"name":"estimateSendFee","outputs":[{"internalType":"uint256","name":"nativeFee","type":"uint256"},{"internalType":"uint256","name":"_zroFee","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"},{"internalType":"bytes","name":"","type":"bytes"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"failedMessages","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"feeCollectorAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"_srcChainId","type":"uint16"},{"internalType":"bytes","name":"_srcAddress","type":"bytes"}],"name":"forceResumeReceive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"getApproved","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"","type":"uint16"},{"internalType":"uint16","name":"_chainId","type":"uint16"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"_configType","type":"uint256"}],"name":"getConfig","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getLzEndpoint","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"_chainId","type":"uint16"}],"name":"getTrustedRemote","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isMintActive","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"_srcChainId","type":"uint16"},{"internalType":"bytes","name":"_srcAddress","type":"bytes"}],"name":"isTrustedRemote","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"_srcChainId","type":"uint16"},{"internalType":"bytes","name":"_srcAddress","type":"bytes"},{"internalType":"uint64","name":"_nonce","type":"uint64"},{"internalType":"bytes","name":"_payload","type":"bytes"}],"name":"lzReceive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"maxMintQuantity","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_quantity","type":"uint256"}],"name":"mint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint16","name":"_srcChainId","type":"uint16"},{"internalType":"bytes","name":"_srcAddress","type":"bytes"},{"internalType":"uint64","name":"_nonce","type":"uint64"},{"internalType":"bytes","name":"_payload","type":"bytes"}],"name":"nonblockingLzReceive","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"ownerOf","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bool","name":"pause","type":"bool"}],"name":"pauseSendTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"price","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_srcChainId","type":"uint16"},{"internalType":"bytes","name":"_srcAddress","type":"bytes"},{"internalType":"uint64","name":"_nonce","type":"uint64"},{"internalType":"bytes","name":"_payload","type":"bytes"}],"name":"retryMessage","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"reveal","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint16","name":"_dstChainId","type":"uint16"},{"internalType":"bytes","name":"_toAddress","type":"bytes"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"address payable","name":"_refundAddress","type":"address"},{"internalType":"address","name":"_zroPaymentAddress","type":"address"},{"internalType":"bytes","name":"_adapterParam","type":"bytes"}],"name":"send","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"_from","type":"address"},{"internalType":"uint16","name":"_dstChainId","type":"uint16"},{"internalType":"bytes","name":"_toAddress","type":"bytes"},{"internalType":"uint256","name":"_tokenId","type":"uint256"},{"internalType":"address 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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] : _name (string): Yakuza Pandas
Arg [1] : _symbol (string): YKPS
Arg [2] : _baseTokenURI (string): ipfs://bafybeiacgw3hefnfazbgdmediynfs5juk2qcm2ld6vqu7cufbb3hbtbxta
Arg [3] : _layerZeroEndpoint (address): 0x3c2269811836af69497e5f486a85d7316753cf62
Arg [4] : _startMintId (uint256): 2000
Arg [5] : _endMintId (uint256): 3166
Arg [6] : _stableTokenAddress (address): 0xb97ef9ef8734c71904d8002f8b6bc66dd9c48a6e
Arg [7] : _stableTokenDecimals (uint256): 6
Arg [8] : _feeCollectorAddress (address): 0xf0638096047ef0183d0f3232e82205b118e100dd

-----Encoded View---------------
17 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000120
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000160
Arg [2] : 00000000000000000000000000000000000000000000000000000000000001a0
Arg [3] : 0000000000000000000000003c2269811836af69497e5f486a85d7316753cf62
Arg [4] : 00000000000000000000000000000000000000000000000000000000000007d0
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000c5e
Arg [6] : 000000000000000000000000b97ef9ef8734c71904d8002f8b6bc66dd9c48a6e
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [8] : 000000000000000000000000f0638096047ef0183d0f3232e82205b118e100dd
Arg [9] : 000000000000000000000000000000000000000000000000000000000000000d
Arg [10] : 59616b757a612050616e64617300000000000000000000000000000000000000
Arg [11] : 0000000000000000000000000000000000000000000000000000000000000004
Arg [12] : 594b505300000000000000000000000000000000000000000000000000000000
Arg [13] : 0000000000000000000000000000000000000000000000000000000000000042
Arg [14] : 697066733a2f2f6261667962656961636777336865666e66617a6267646d6564
Arg [15] : 69796e6673356a756b3271636d326c6436767175376375666262336862746278
Arg [16] : 7461000000000000000000000000000000000000000000000000000000000000


Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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