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0xCcbA0b2bc4BAbe4cbFb6bD2f1Edc2A9e86b7845f
 

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Transaction Hash
Method
Block
From
To
Approve216036442025-01-11 20:31:5932 hrs ago1736627519IN
Seasonal Tokens: WINTER Token
0 ETH0.000133322.86332326
Approve215471032025-01-03 23:01:119 days ago1735945271IN
Seasonal Tokens: WINTER Token
0 ETH0.000348357.52592345
Approve215294522025-01-01 11:55:2311 days ago1735732523IN
Seasonal Tokens: WINTER Token
0 ETH0.000497610.68674507
Approve215036572024-12-28 21:29:5915 days ago1735421399IN
Seasonal Tokens: WINTER Token
0 ETH0.000192464.15061338
Approve215007822024-12-28 11:51:5915 days ago1735386719IN
Seasonal Tokens: WINTER Token
0 ETH0.000172543.70572621
Approve214367012024-12-19 12:55:4724 days ago1734612947IN
Seasonal Tokens: WINTER Token
0 ETH0.0005415911.70383354
Approve214167612024-12-16 18:05:3527 days ago1734372335IN
Seasonal Tokens: WINTER Token
0 ETH0.0011974225.82261261
Approve214085442024-12-15 14:33:5928 days ago1734273239IN
Seasonal Tokens: WINTER Token
0 ETH0.000262149.94805593
Safe Approve And...214045682024-12-15 1:14:2329 days ago1734225263IN
Seasonal Tokens: WINTER Token
0 ETH0.000577386.80618021
Transfer214015262024-12-14 15:03:5929 days ago1734188639IN
Seasonal Tokens: WINTER Token
0 ETH0.000465769.93921881
Safe Approve And...213974032024-12-14 1:14:5930 days ago1734138899IN
Seasonal Tokens: WINTER Token
0 ETH0.0009054710.67366581
Safe Approve And...213902422024-12-13 1:15:2331 days ago1734052523IN
Seasonal Tokens: WINTER Token
0 ETH0.0009782511.53157976
Approve213850152024-12-12 7:44:5931 days ago1733989499IN
Seasonal Tokens: WINTER Token
0 ETH0.0007356715.77520247
Safe Approve And...213830752024-12-12 1:14:5932 days ago1733966099IN
Seasonal Tokens: WINTER Token
0 ETH0.0012016914.16537339
Safe Approve And...213759182024-12-11 1:14:3533 days ago1733879675IN
Seasonal Tokens: WINTER Token
0 ETH0.0011028613.00048109
Safe Approve And...213687572024-12-10 1:14:1134 days ago1733793251IN
Seasonal Tokens: WINTER Token
0 ETH0.0017857321.05001403
Approve213635032024-12-09 7:39:1134 days ago1733729951IN
Seasonal Tokens: WINTER Token
0 ETH0.00045719.81683018
Safe Approve And...213615822024-12-09 1:13:2335 days ago1733706803IN
Seasonal Tokens: WINTER Token
0 ETH0.0014283816.83757179
Transfer213608772024-12-08 22:51:3535 days ago1733698295IN
Seasonal Tokens: WINTER Token
0 ETH0.0004850110.35265293
Approve213591462024-12-08 17:04:1135 days ago1733677451IN
Seasonal Tokens: WINTER Token
0 ETH0.0006637614.31799759
Approve213558352024-12-08 5:58:5935 days ago1733637539IN
Seasonal Tokens: WINTER Token
0 ETH0.000315726.78069367
Approve213545262024-12-08 1:36:1136 days ago1733621771IN
Seasonal Tokens: WINTER Token
0 ETH0.000442239.55172879
Safe Approve And...213544152024-12-08 1:13:5936 days ago1733620439IN
Seasonal Tokens: WINTER Token
0 ETH0.000883110.409953
Approve213483622024-12-07 4:54:3537 days ago1733547275IN
Seasonal Tokens: WINTER Token
0 ETH0.0006185913.3713619
Approve213481442024-12-07 4:10:5937 days ago1733544659IN
Seasonal Tokens: WINTER Token
0 ETH0.0005132611.02302789
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216131612025-01-13 4:24:231 hr ago1736742263
0xCcbA0b2b...e86b7845f
0 ETH
216119212025-01-13 0:13:475 hrs ago1736727227
0xCcbA0b2b...e86b7845f
0 ETH
216118492025-01-12 23:59:235 hrs ago1736726363
0xCcbA0b2b...e86b7845f
0 ETH
216116362025-01-12 23:16:356 hrs ago1736723795
0xCcbA0b2b...e86b7845f
0 ETH
216064302025-01-12 5:50:5923 hrs ago1736661059
0xCcbA0b2b...e86b7845f
0 ETH
216056922025-01-12 3:22:4726 hrs ago1736652167
0xCcbA0b2b...e86b7845f
0 ETH
216055932025-01-12 3:02:5926 hrs ago1736650979
0xCcbA0b2b...e86b7845f
0 ETH
216052022025-01-12 1:44:2327 hrs ago1736646263
0xCcbA0b2b...e86b7845f
0 ETH
216046492025-01-11 23:53:4729 hrs ago1736639627
0xCcbA0b2b...e86b7845f
0 ETH
216043362025-01-11 22:50:5930 hrs ago1736635859
0xCcbA0b2b...e86b7845f
0 ETH
216030912025-01-11 18:40:2334 hrs ago1736620823
0xCcbA0b2b...e86b7845f
0 ETH
216027982025-01-11 17:41:3535 hrs ago1736617295
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216024222025-01-11 16:25:4737 hrs ago1736612747
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216016322025-01-11 13:46:5939 hrs ago1736603219
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0 ETH
216008982025-01-11 11:19:3542 hrs ago1736594375
0xCcbA0b2b...e86b7845f
0 ETH
215997172025-01-11 7:21:4746 hrs ago1736580107
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215971412025-01-10 22:43:472 days ago1736549027
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215969442025-01-10 22:03:592 days ago1736546639
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215969442025-01-10 22:03:592 days ago1736546639
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215969442025-01-10 22:03:592 days ago1736546639
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215932902025-01-10 9:50:232 days ago1736502623
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215929932025-01-10 8:50:352 days ago1736499035
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215926852025-01-10 7:48:112 days ago1736495291
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215912032025-01-10 2:49:353 days ago1736477375
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215909312025-01-10 1:54:353 days ago1736474075
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0 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
WinterToken

Compiler Version
v0.8.5+commit.a4f2e591

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity Multiple files format)

File 1 of 5: WinterToken.sol
//SPDX-License-Identifier: MIT
pragma solidity 0.8.5;


import "./ERC20.sol";
import "./ERC918.sol";
import "./Owned.sol";
import "./ApproveAndCallFallBack.sol";


// ----------------------------------------------------------------------------

// 'Winter Token' contract

// ERC20 & ERC918 Mineable Token using Proof Of Work

// Symbol      : WINTER

// Name        : Winter Token

// Total supply: 33,112,800.00

// Decimals    : 18

// Initial mining reward: 105

// Fraction of total supply released before first halving: 1/2

// ----------------------------------------------------------------------------





contract WinterToken is ERC20Interface, ERC918, Owned {

    string private constant SYMBOL = "WINTER";

    string private constant NAME = "Winter Token";

    uint256 public constant TOKEN_IDENTIFIER = 4;

    uint8 public constant DECIMALS = 18;

    uint256 public constant TOTAL_SUPPLY = 33112800 * 10**18;

    uint256 public constant INITIAL_REWARD = 105 * 10**18;

    uint256 public constant MAX_REWARDS_AVAILABLE = 72; // no more than 72 rewards per mint

    uint256 public constant REWARD_INTERVAL = 600; // rewards every ten minutes on average

    uint256 public constant DURATION_OF_FIRST_ERA = (365 * 24 * 60 * 60 * 3); // 36 months

    uint256 public constant DURATION_OF_ERA = 3 * 365 * 24 * 60 * 60; // three years

    uint256 public constant MINIMUM_TARGET = 2**16;

    uint256 public constant MAXIMUM_TARGET = 2**234;

    uint256 public immutable contractCreationTime;

    uint256 public lastRewardBlockTime;

    uint256 public maxNumberOfRewardsPerMint;

    bytes32 private challengeNumber;
        
    uint256 private miningTarget;

    uint256 public tokensMinted;

    mapping(address => uint256) internal balances;

    mapping(address => mapping(address => uint256)) internal allowed;


    constructor() {

        miningTarget = MAXIMUM_TARGET / 2**19;

        contractCreationTime = block.timestamp;
        lastRewardBlockTime = block.timestamp;

        maxNumberOfRewardsPerMint = 1;

        challengeNumber = _getNewChallengeNumber(0);

    }

    function name() public pure returns (string memory) {
        return NAME;
    }

    function symbol() public pure returns (string memory) {
        return SYMBOL;
    }

    function mint(uint256 nonce) override public returns (bool success) {

        uint256 _lastRewardBlockTime = lastRewardBlockTime;
        
        uint256 singleRewardAmount = _getMiningReward(_lastRewardBlockTime);

        // no more minting when reward reaches zero
        if (singleRewardAmount == 0) revert("Reward has reached zero");

        // the PoW must contain work that includes the challenge number and the msg.sender's address
        bytes32 digest =  keccak256(abi.encodePacked(challengeNumber, msg.sender, nonce));

        uint256 _miningTarget = miningTarget;
        // the digest must be smaller than the target
        if (uint256(digest) > _miningTarget) revert("Digest is larger than mining target");

        uint256 _previousMaxNumberOfRewards = maxNumberOfRewardsPerMint;
        uint256 numberOfRewardsToGive = _numberOfRewardsToGive(_miningTarget / uint256(digest), 
                                                               _lastRewardBlockTime,
                                                               _previousMaxNumberOfRewards,
                                                               block.timestamp);
        uint256 totalRewardAmount = singleRewardAmount * numberOfRewardsToGive;

        uint256 _tokensMinted = _giveRewards(totalRewardAmount);
        
        _setNextMaxNumberOfRewards(numberOfRewardsToGive, _previousMaxNumberOfRewards);

        miningTarget = _adjustDifficulty(_miningTarget, _lastRewardBlockTime,
                                         numberOfRewardsToGive, block.timestamp);

        bytes32 newChallengeNumber = _getNewChallengeNumber(_tokensMinted);
        challengeNumber = newChallengeNumber;

        lastRewardBlockTime = block.timestamp;

        emit Mint(msg.sender, totalRewardAmount, _scheduledNumberOfRewards(block.timestamp), 
                  newChallengeNumber);

        return true;
    }

    function _numberOfRewardsAvailable(uint256 _lastRewardBlockTime, 
                                       uint256 _previousMaxNumberOfRewards, 
                                       uint256 currentTime) internal pure returns (uint256) {

        uint256 numberAvailable = _previousMaxNumberOfRewards;
        uint256 intervalsSinceLastReward = (currentTime - _lastRewardBlockTime) / REWARD_INTERVAL;
        
        if (intervalsSinceLastReward > numberAvailable)
            numberAvailable = intervalsSinceLastReward;

        if (numberAvailable > MAX_REWARDS_AVAILABLE)
            numberAvailable = MAX_REWARDS_AVAILABLE;

        return numberAvailable;
    }

    function _numberOfRewardsToGive(uint256 numberEarned, uint256 _lastRewardBlockTime, 
                                    uint256 _previousMaxNumberOfRewards,
                                    uint256 currentTime) internal pure returns (uint256) {

        uint256 numberAvailable = _numberOfRewardsAvailable(_lastRewardBlockTime,
                                                         _previousMaxNumberOfRewards,
                                                         currentTime);
        if (numberEarned < numberAvailable)
            return numberEarned;

        return numberAvailable;
    }

    function _giveRewards(uint256 totalReward) internal returns (uint256) {

        balances[msg.sender] += totalReward;
        uint256 _tokensMinted = tokensMinted + totalReward;
        tokensMinted = _tokensMinted;
        return _tokensMinted;
    }

    function _setNextMaxNumberOfRewards(uint256 numberOfRewardsGivenNow, 
                                        uint256 _previousMaxNumberOfRewards) internal {

        // the value of the rewards given to this miner presumably exceed the gas costs
        // for processing the transaction. the next miner can submit a proof of enough work
        // to claim up to the same number of rewards immediately, or, if gas costs have increased,
        // wait until the maximum number of rewards claimable has increased enough to overcome
        // the costs.

        if (numberOfRewardsGivenNow != _previousMaxNumberOfRewards)
            maxNumberOfRewardsPerMint = numberOfRewardsGivenNow;
    }

    // backwards compatible mint function
    function mint(uint256 _nonce, bytes32 _challengeDigest) external returns (bool) {

        bytes32 digest = keccak256(abi.encodePacked(challengeNumber, msg.sender, _nonce));
        require(digest == _challengeDigest, "Challenge digest does not match expected digest on token contract");
        
        return mint(_nonce);
    }

    function _getNewChallengeNumber(uint256 _tokensMinted) internal view returns (bytes32) {
        
        // make the latest ethereum block hash a part of the next challenge

        // xor with a number unique to this token to avoid merged mining
        
        // xor with the number of tokens minted to ensure that the challenge changes
        // even if there are multiple mints in the same ethereum block
        
        return bytes32(uint256(blockhash(block.number - 1)) ^ _tokensMinted ^ TOKEN_IDENTIFIER);
    }


    function _scheduledNumberOfRewards(uint256 currentTime) internal view returns (uint256) {
        return (currentTime - contractCreationTime) / REWARD_INTERVAL;
    }

    function _adjustDifficulty(uint256 _miningTarget, 
                               uint256 _lastRewardBlockTime, 
                               uint256 rewardsGivenNow,
                               uint256 currentTime) internal pure returns (uint256){

        uint256 timeSinceLastReward = currentTime - _lastRewardBlockTime;

        // we target a median interval of 10 minutes multiplied by log(2) ~ 61/88 
        // this gives a mean interval of 10 minutes per reward

        if (timeSinceLastReward * 88 < rewardsGivenNow * REWARD_INTERVAL * 61)
            _miningTarget = (_miningTarget * 99) / 100;   // slow down
        else
            _miningTarget = (_miningTarget * 100) / 99;   // speed up

        if (_miningTarget < MINIMUM_TARGET)
            _miningTarget = MINIMUM_TARGET;
        
        if (_miningTarget > MAXIMUM_TARGET) 
            _miningTarget = MAXIMUM_TARGET;

        return _miningTarget;
    }


    function rewardEra(uint256 _time) public view returns (uint256) {

        uint256 timeSinceContractCreation = _time - contractCreationTime;

        if (timeSinceContractCreation < DURATION_OF_FIRST_ERA)
            return 0;
        else
            return 1 + (timeSinceContractCreation - DURATION_OF_FIRST_ERA) / DURATION_OF_ERA;
    }

    function getAdjustmentInterval() public view override returns (uint256) {
        return REWARD_INTERVAL * maxNumberOfRewardsPerMint;
    }

    function getChallengeNumber() public view override returns (bytes32) {
        return challengeNumber;
    }

    function getMiningDifficulty() public view override returns (uint256) {
        // 64 f's:         1234567890123456789012345678901234567890123456789012345678901234
        uint256 maxInt = 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;
        return maxInt / miningTarget;
    }

    function getMiningTarget() public view override returns (uint256) {
       return miningTarget;
   }

    function getMiningReward() public view override returns (uint256) {

        // use the timestamp of the ethereum block that gave the last reward
        // because ethereum miners can manipulate the value of block.timestamp
        return _getMiningReward(lastRewardBlockTime);
    }

    function _getMiningReward(uint256 _time) internal view returns (uint256) {
        return INITIAL_REWARD / 2**rewardEra(_time);
    }

    function getNumberOfRewardsAvailable(uint256 currentTime) external view returns (uint256) {
        return _numberOfRewardsAvailable(lastRewardBlockTime, 
                                         maxNumberOfRewardsPerMint, 
                                         currentTime);
    }

    function getRewardAmountForAchievingTarget(uint256 targetAchieved, uint256 currentTime) external view returns (uint256) {
        uint256 numberOfRewardsToGive = _numberOfRewardsToGive(miningTarget / targetAchieved, 
                                                               lastRewardBlockTime, 
                                                               maxNumberOfRewardsPerMint, 
                                                               currentTime);
        return _getMiningReward(currentTime) * numberOfRewardsToGive;
    }

    function decimals() public pure override returns (uint8) {
        return DECIMALS;
    }

    function totalSupply() public view override returns (uint256) {

        return tokensMinted;
    }


    // ------------------------------------------------------------------------

    // Get the token balance for account `tokenOwner`

    // ------------------------------------------------------------------------

    function balanceOf(address tokenOwner) public view override returns (uint256 balance) {

        return balances[tokenOwner];

    }



    // ------------------------------------------------------------------------

    // Transfer the balance from token owner's account to `to` account

    // - Owner's account must have sufficient balance to transfer

    // - 0 value transfers are allowed

    // ------------------------------------------------------------------------

    function transfer(address to, uint256 tokens) public override returns (bool success) {
        
        require(to != address(0) && to != address(this), "Invalid address");
        
        balances[msg.sender] = balances[msg.sender] - tokens;

        balances[to] = balances[to] + tokens;

        emit Transfer(msg.sender, to, tokens);

        return true;

    }



    // ------------------------------------------------------------------------

    // Token owner can approve for `spender` to transferFrom(...) `tokens`

    // from the token owner's account

    //

    // Warning: This function is vulnerable to double-spend attacks and is

    // included for backwards compatibility. Use safeApprove instead.

    // ------------------------------------------------------------------------

    function approve(address spender, uint256 tokens) public override returns (bool success) {
        
        require(spender != address(0) && spender != address(this), "Invalid address");

        allowed[msg.sender][spender] = tokens;

        emit Approval(msg.sender, spender, tokens);

        return true;

    }



    // ------------------------------------------------------------------------

    // Allow token owner to cancel the approval if the approved amount changes from its last

    // known value before this transaction is processed. This allows the owner to avoid 

    // unintentionally re-approving funds that have already been spent.

    // ------------------------------------------------------------------------

    function safeApprove(address spender, uint256 previousAllowance, uint256 newAllowance) external returns (bool success) {

        require(allowed[msg.sender][spender] == previousAllowance,
                "Current spender allowance does not match specified value");

        return approve(spender, newAllowance);
    }



    // ------------------------------------------------------------------------

    // Transfer `tokens` from the `from` account to the `to` account

    //

    // The calling account must already have sufficient tokens approve(...)-d

    // for spending from the `from` account and

    // - From account must have sufficient balance to transfer

    // - Spender must have sufficient allowance to transfer

    // - 0 value transfers are allowed

    // ------------------------------------------------------------------------

    function transferFrom(address from, address to, uint256 tokens) public override returns (bool success) {
        
        require(to != address(0) && to != address(this), "Invalid address");

        balances[from] = balances[from] - tokens;

        allowed[from][msg.sender] = allowed[from][msg.sender] - tokens;

        balances[to] = balances[to] + tokens;

        emit Transfer(from, to, tokens);

        return true;

    }



    // ------------------------------------------------------------------------

    // Returns the amount of tokens approved by the owner that can be

    // transferred to the spender's account

    // ------------------------------------------------------------------------

    function allowance(address tokenOwner, address spender) public view override returns (uint256 remaining){

        return allowed[tokenOwner][spender];

    }


    // ------------------------------------------------------------------------

    // Token owner can approve for `spender` to transferFrom(...) `tokens`

    // from the token owner's account. The `spender` contract function

    // `receiveApproval(...)` is then executed. This is vulnerable to double-spend attacks

    // when called directly, so it is declared internal and called by safeApproveAndCall

    // ------------------------------------------------------------------------

    function approveAndCall(address spender, uint256 tokens, bytes memory data) internal returns (bool success) {
        
        require(spender != address(0) && spender != address(this), "Invalid address");

        allowed[msg.sender][spender] = tokens;

        emit Approval(msg.sender, spender, tokens);

        ApproveAndCallFallBack(spender).receiveApproval(msg.sender, tokens, address(this), data);

        return true;

    }


    // ------------------------------------------------------------------------

    // Allow safe approvals with calls to receiving contract

    // ------------------------------------------------------------------------

    function safeApproveAndCall(address spender, uint256 previousAllowance, 
                                uint256 newAllowance, bytes memory data) external returns (bool success) {

        require(allowed[msg.sender][spender] == previousAllowance,
                "Current spender allowance does not match specified value");

        return approveAndCall(spender, newAllowance, data);
    }


    // ------------------------------------------------------------------------

    // Owner can transfer out any accidentally sent ERC20 tokens

    // ------------------------------------------------------------------------

    function transferAnyERC20Token(address tokenAddress, uint256 tokens) external onlyOwner returns (bool success) {

        return ERC20Interface(tokenAddress).transfer(owner, tokens);

    }

}

File 2 of 5: ApproveAndCallFallBack.sol
    //SPDX-License-Identifier: MIT
    pragma solidity 0.8.5;



    // ----------------------------------------------------------------------------

    // Contract function to receive approval and execute function in one call

    // Borrowed from MiniMeToken

    // ----------------------------------------------------------------------------

    abstract contract ApproveAndCallFallBack {

        function receiveApproval(address from, uint256 tokens, address token, bytes memory data) public virtual ;

    }


File 3 of 5: ERC20.sol
    //SPDX-License-Identifier: MIT
    pragma solidity 0.8.5;


    // ----------------------------------------------------------------------------

    // ERC Token Standard #20 Interface

    // https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20-token-standard.md

    // ----------------------------------------------------------------------------

    abstract contract ERC20Interface {

        function totalSupply() public view virtual returns (uint);

        function balanceOf(address tokenOwner) public view virtual returns (uint balance);

        function allowance(address tokenOwner, address spender) public view virtual returns (uint remaining);

        function transfer(address to, uint tokens) public virtual returns (bool success);

        function approve(address spender, uint tokens) public virtual returns (bool success);

        function transferFrom(address from, address to, uint tokens) public virtual returns (bool success);


        event Transfer(address indexed from, address indexed to, uint tokens);

        event Approval(address indexed tokenOwner, address indexed spender, uint tokens);

    }



File 4 of 5: ERC918.sol
    //SPDX-License-Identifier: MIT
    pragma solidity 0.8.5;


    // ----------------------------------------------------------------------------

    // ERC Token Standard #918 Interface

    // https://eips.ethereum.org/EIPS/eip-918

    // ----------------------------------------------------------------------------

    interface ERC918  {

        function mint(uint256 nonce) external returns (bool success);

        function getAdjustmentInterval() external view returns (uint);

        function getChallengeNumber() external view returns (bytes32);

        function getMiningDifficulty() external view returns (uint);

        function getMiningTarget() external view returns (uint);

        function getMiningReward() external view returns (uint);
       
        function decimals() external view returns (uint8);


        event Mint(address indexed from, uint rewardAmount, uint epochCount, bytes32 newChallengeNumber);
    }

File 5 of 5: Owned.sol
    //SPDX-License-Identifier: MIT
    pragma solidity 0.8.5;



    // ----------------------------------------------------------------------------

    // Owned contract

    // ----------------------------------------------------------------------------

    abstract contract Owned {

        address public owner;

        address public newOwner;


        event OwnershipTransferred(address indexed _from, address indexed _to);


        constructor() {

            owner = msg.sender;

        }


        modifier onlyOwner {

            require(msg.sender == owner);

            _;

        }


        function transferOwnership(address _newOwner) public onlyOwner {

            require(_newOwner != address(0), "Invalid address");

            newOwner = _newOwner;

        }

        function acceptOwnership() external {

            require(msg.sender == newOwner);

            emit OwnershipTransferred(owner, newOwner);

            owner = newOwner;

            newOwner = address(0);

        }

    }


Contract Security Audit

Contract ABI

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"tokenOwner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":false,"internalType":"uint256","name":"rewardAmount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"epochCount","type":"uint256"},{"indexed":false,"internalType":"bytes32","name":"newChallengeNumber","type":"bytes32"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_from","type":"address"},{"indexed":true,"internalType":"address","name":"_to","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"DECIMALS","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DURATION_OF_ERA","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"DURATION_OF_FIRST_ERA","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"INITIAL_REWARD","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAXIMUM_TARGET","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_REWARDS_AVAILABLE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MINIMUM_TARGET","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"REWARD_INTERVAL","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TOKEN_IDENTIFIER","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TOTAL_SUPPLY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenOwner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"remaining","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenOwner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"balance","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"contractCreationTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getAdjustmentInterval","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getChallengeNumber","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMiningDifficulty","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMiningReward","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMiningTarget","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"currentTime","type":"uint256"}],"name":"getNumberOfRewardsAvailable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"targetAchieved","type":"uint256"},{"internalType":"uint256","name":"currentTime","type":"uint256"}],"name":"getRewardAmountForAchievingTarget","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lastRewardBlockTime","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"maxNumberOfRewardsPerMint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_nonce","type":"uint256"},{"internalType":"bytes32","name":"_challengeDigest","type":"bytes32"}],"name":"mint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"nonce","type":"uint256"}],"name":"mint","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"newOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_time","type":"uint256"}],"name":"rewardEra","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"previousAllowance","type":"uint256"},{"internalType":"uint256","name":"newAllowance","type":"uint256"}],"name":"safeApprove","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"previousAllowance","type":"uint256"},{"internalType":"uint256","name":"newAllowance","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"safeApproveAndCall","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"tokensMinted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"transferAnyERC20Token","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokens","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"success","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

ipfs://675ac9516343bf5e254dc38eb10f6377b12932588d9091dacac9e60d7d6bc65a

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

The four Seasonal Tokens, Spring, Summer, Autumn and Winter, have been designed so that their prices will slowly oscillate around one another, providing investors with the opportunity to trade the more expensive tokens for the cheaper ones.

Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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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.