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Contract

0x0F531335a5327a5884978f5dc74d662DA809aDA7
 

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0 ETH

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Unstake163816392023-01-11 6:00:23605 days ago1673416823IN
0x0F531335...DA809aDA7
0 ETH0.0013546517.16256979
Unstake156884552022-10-06 10:25:59702 days ago1665051959IN
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0 ETH0.001205115
Unstake153942902022-08-23 3:41:51746 days ago1661226111IN
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0 ETH0.000800976.61755727
Unstake153269172022-08-12 12:13:37757 days ago1660306417IN
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0 ETH0.000764889.69055928
Unstake153009282022-08-08 10:08:42761 days ago1659953322IN
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0 ETH0.000551166.68370369
Stake152344462022-07-29 1:21:38772 days ago1659057698IN
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0 ETH0.000883247.84590335
Unstake151516202022-07-16 4:39:26784 days ago1657946366IN
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0 ETH0.0006903211.16471653
Unstake151296692022-07-12 19:09:32788 days ago1657652972IN
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0 ETH0.0020008925.34990448
Unstake151116662022-07-10 0:36:21791 days ago1657413381IN
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0 ETH0.0007476612.09200062
Stake151052982022-07-09 0:47:14792 days ago1657327634IN
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0 ETH0.0017316211.79793223
Unstake150976402022-07-07 20:46:30793 days ago1657226790IN
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0 ETH0.0031209850.48580127
Unstake150754042022-07-04 10:10:58796 days ago1656929458IN
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0 ETH0.0019933813.90546364
Unstake150662232022-07-03 0:12:03798 days ago1656807123IN
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0 ETH0.000667548.4572978
Unstake150662082022-07-03 0:09:11798 days ago1656806951IN
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0 ETH0.000738619.35776874
Unstake150651002022-07-02 19:54:43798 days ago1656791683IN
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0 ETH0.0012243612.29722207
Unstake149989112022-06-20 22:05:21810 days ago1655762721IN
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0 ETH0.0016896727.32736892
Unstake149982772022-06-20 19:31:06810 days ago1655753466IN
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0 ETH0.001530424.75143084
Unstake149972432022-06-20 15:12:48810 days ago1655737968IN
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0 ETH0.0028426829.24818263
Unstake149940872022-06-20 2:19:49811 days ago1655691589IN
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0 ETH0.0037392925.02725231
Unstake149922022022-06-19 18:27:58811 days ago1655663278IN
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0 ETH0.0010593617.13657447
Unstake149919652022-06-19 17:33:39811 days ago1655660019IN
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0 ETH0.0015888425.69656583
Unstake149908492022-06-19 12:44:56811 days ago1655642696IN
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0 ETH0.0013136516.64302396
Unstake149896032022-06-19 7:36:22811 days ago1655624182IN
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0 ETH0.0029381920.49619486
Unstake149888412022-06-19 4:21:00811 days ago1655612460IN
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0 ETH0.0002772111.21515405
Unstake149888412022-06-19 4:21:00811 days ago1655612460IN
0x0F531335...DA809aDA7
0 ETH0.0002648510.71515405
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Contract Source Code Verified (Exact Match)

Contract Name:
ASStake

Compiler Version
v0.8.6+commit.11564f7e

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion
File 1 of 6 : ASStake.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.6;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol";
import "@openzeppelin/contracts/token/ERC721/IERC721.sol";

contract ASStake is Ownable, IERC721Receiver {
    mapping (uint => address) public ownership;
    mapping(uint => uint) public stakeTime;
    mapping (address => uint[]) private _qty;

    bool public paused = true;
    uint nullToken = 1 ether;
    IERC721 public NFT;

    modifier notPaused(){
        require(!paused, "PAUSED");
        _;
    }

    constructor() {}

    function togglePause() public onlyOwner {
        paused = !paused;
    }

    function setNFTAddress(address new_) external onlyOwner {
        NFT = IERC721(new_);
    }

    function getAssetsByHolder(address holder) public view returns (uint[] memory){
        return _qty[holder];
    }

    function stake(uint[] calldata tokenIds) public notPaused {
        for(uint i=0; i < tokenIds.length; i++){
            uint tokenId = tokenIds[i];
            if(NFT.ownerOf(tokenId) == _msgSender()){
                stakeTime[tokenId] = block.timestamp;
                ownership[tokenId] = _msgSender();
                NFT.transferFrom(_msgSender(), address(this), tokenId);
                _qty[_msgSender()].push(tokenId);
            }
        }
    }

    function unstake(uint[] calldata tokenIds) public {
        for(uint i=0; i< tokenIds.length; i++){
            uint tokenId = tokenIds[i];
            recover(tokenId);
            removeToken(tokenId);
        }
    }

    function recover(uint tokenId) internal {
        require(ownership[tokenId] == _msgSender(), "ownership failed");
        ownership[tokenId] = address(0);
        NFT.transferFrom(address(this), _msgSender(), tokenId);
    }

    function removeToken(uint tokenId) internal {
        for(uint i=0;i<_qty[_msgSender()].length;i++){
            if(_qty[_msgSender()][i] == tokenId){
                _qty[_msgSender()][i] = nullToken;
                break;
            }
        }
    }

    function onERC721Received(
        address operator,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        require(address(NFT) == operator, "not allowed");
        return this.onERC721Received.selector;
    }

}

File 2 of 6 : 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 3 of 6 : 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 4 of 6 : 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 5 of 6 : 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 6 of 6 : 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);
    }
}

Settings
{
  "remappings": [],
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "evmVersion": "berlin",
  "libraries": {},
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"inputs":[],"name":"NFT","outputs":[{"internalType":"contract IERC721","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"holder","type":"address"}],"name":"getAssetsByHolder","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"ownership","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"new_","type":"address"}],"name":"setNFTAddress","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"stake","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"stakeTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"togglePause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256[]","name":"tokenIds","type":"uint256[]"}],"name":"unstake","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.