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Civic (CVC) (@$0.1124)

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0x305feab44d56ed429236d3a937119816aaeb80fd0e5120a66d27df01823a4c3d Transfer(pending)2025-04-14 0:03:3941 hrs ago1744589019IN
Civic: CVC Token
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0x15495a6ac6fe3adb44f3a54d295a6cc8d8c9afc07f3745a3a216d8ea6a3ee12e Transfer(pending)2025-04-13 2:41:512 days ago1744512111IN
Civic: CVC Token
0 ETH(Pending)(Pending)
Transfer222757812025-04-15 17:09:4714 mins ago1744736987IN
Civic: CVC Token
0 ETH0.000085282.83606308
Transfer222757312025-04-15 16:59:4724 mins ago1744736387IN
Civic: CVC Token
0 ETH0.000108653.11806094
Transfer222757312025-04-15 16:59:4724 mins ago1744736387IN
Civic: CVC Token
0 ETH0.000108653.11806094
Transfer222757312025-04-15 16:59:4724 mins ago1744736387IN
Civic: CVC Token
0 ETH0.000162043.11806094
Transfer222757302025-04-15 16:59:3525 mins ago1744736375IN
Civic: CVC Token
0 ETH0.0005113616.99863328
Transfer222756992025-04-15 16:53:1131 mins ago1744735991IN
Civic: CVC Token
0 ETH0.0005993717.1825484
Transfer222756992025-04-15 16:53:1131 mins ago1744735991IN
Civic: CVC Token
0 ETH0.000893217.1825484
Transfer222756152025-04-15 16:36:1148 mins ago1744734971IN
Civic: CVC Token
0 ETH0.000312046.61348896
Transfer222756072025-04-15 16:34:3550 mins ago1744734875IN
Civic: CVC Token
0 ETH0.000121623.48790584
Transfer222755442025-04-15 16:21:591 hr ago1744734119IN
Civic: CVC Token
0 ETH0.000054151.80103078
Transfer222755442025-04-15 16:21:591 hr ago1744734119IN
Civic: CVC Token
0 ETH0.000081222.70103078
Transfer222755422025-04-15 16:21:351 hr ago1744734095IN
Civic: CVC Token
0 ETH0.000169733.26592971
Transfer222755322025-04-15 16:19:351 hr ago1744733975IN
Civic: CVC Token
0 ETH0.000099353.30394009
Transfer222754992025-04-15 16:12:591 hr ago1744733579IN
Civic: CVC Token
0 ETH0.000060142
Transfer222754702025-04-15 16:07:111 hr ago1744733231IN
Civic: CVC Token
0 ETH0.000164443.16410892
Transfer222754672025-04-15 16:06:351 hr ago1744733195IN
Civic: CVC Token
0 ETH0.000163923.15422372
Transfer222754212025-04-15 15:57:231 hr ago1744732643IN
Civic: CVC Token
0 ETH0.0005204317.29981943
Transfer222754002025-04-15 15:53:111 hr ago1744732391IN
Civic: CVC Token
0 ETH0.000897217.26749953
Transfer222753312025-04-15 15:39:231 hr ago1744731563IN
Civic: CVC Token
0 ETH0.000062952.09278753
Transfer222752712025-04-15 15:27:231 hr ago1744730843IN
Civic: CVC Token
0 ETH0.0001092.09690862
Transfer222752492025-04-15 15:22:592 hrs ago1744730579IN
Civic: CVC Token
0 ETH0.000060162
Transfer222752432025-04-15 15:21:472 hrs ago1744730507IN
Civic: CVC Token
0 ETH0.000083392.7720247
Transfer222752062025-04-15 15:14:232 hrs ago1744730063IN
Civic: CVC Token
0 ETH0.0005149217.11683048
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Contract Source Code Verified (Exact Match)

Contract Name:
CentrallyIssuedToken

Compiler Version
v0.4.8+commit.60cc1668

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2017-07-11
*/

/*
 * ERC20 interface
 * see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 {
  uint public totalSupply;
  function balanceOf(address who) constant returns (uint);
  function allowance(address owner, address spender) constant returns (uint);

  function transfer(address to, uint value) returns (bool ok);
  function transferFrom(address from, address to, uint value) returns (bool ok);
  function approve(address spender, uint value) returns (bool ok);
  event Transfer(address indexed from, address indexed to, uint value);
  event Approval(address indexed owner, address indexed spender, uint value);
}






/**
 * Math operations with safety checks
 */
contract SafeMath {
  function safeMul(uint a, uint b) internal returns (uint) {
    uint c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function safeDiv(uint a, uint b) internal returns (uint) {
    assert(b > 0);
    uint c = a / b;
    assert(a == b * c + a % b);
    return c;
  }

  function safeSub(uint a, uint b) internal returns (uint) {
    assert(b <= a);
    return a - b;
  }

  function safeAdd(uint a, uint b) internal returns (uint) {
    uint c = a + b;
    assert(c>=a && c>=b);
    return c;
  }

  function max64(uint64 a, uint64 b) internal constant returns (uint64) {
    return a >= b ? a : b;
  }

  function min64(uint64 a, uint64 b) internal constant returns (uint64) {
    return a < b ? a : b;
  }

  function max256(uint256 a, uint256 b) internal constant returns (uint256) {
    return a >= b ? a : b;
  }

  function min256(uint256 a, uint256 b) internal constant returns (uint256) {
    return a < b ? a : b;
  }

  function assert(bool assertion) internal {
    if (!assertion) {
      throw;
    }
  }
}



/**
 * Standard ERC20 token with Short Hand Attack and approve() race condition mitigation.
 *
 * Based on code by FirstBlood:
 * https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, SafeMath {

  /* Actual balances of token holders */
  mapping(address => uint) balances;

  /* approve() allowances */
  mapping (address => mapping (address => uint)) allowed;

  /* Interface declaration */
  function isToken() public constant returns (bool weAre) {
    return true;
  }

  function transfer(address _to, uint _value) returns (bool success) {
    balances[msg.sender] = safeSub(balances[msg.sender], _value);
    balances[_to] = safeAdd(balances[_to], _value);
    Transfer(msg.sender, _to, _value);
    return true;
  }

  function transferFrom(address _from, address _to, uint _value) returns (bool success) {
    uint _allowance = allowed[_from][msg.sender];

    balances[_to] = safeAdd(balances[_to], _value);
    balances[_from] = safeSub(balances[_from], _value);
    allowed[_from][msg.sender] = safeSub(_allowance, _value);
    Transfer(_from, _to, _value);
    return true;
  }

  function balanceOf(address _owner) constant returns (uint balance) {
    return balances[_owner];
  }

  function approve(address _spender, uint _value) returns (bool success) {

    // To change the approve amount you first have to reduce the addresses`
    //  allowance to zero by calling `approve(_spender, 0)` if it is not
    //  already 0 to mitigate the race condition described here:
    //  https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
    if ((_value != 0) && (allowed[msg.sender][_spender] != 0)) throw;

    allowed[msg.sender][_spender] = _value;
    Approval(msg.sender, _spender, _value);
    return true;
  }

  function allowance(address _owner, address _spender) constant returns (uint remaining) {
    return allowed[_owner][_spender];
  }

}


/**
 * Upgrade agent interface inspired by Lunyr.
 *
 * Upgrade agent transfers tokens to a new version of a token contract.
 * Upgrade agent can be set on a token by the upgrade master.
 *
 * Steps are
 * - Upgradeabletoken.upgradeMaster calls UpgradeableToken.setUpgradeAgent()
 * - Individual token holders can now call UpgradeableToken.upgrade()
 *   -> This results to call UpgradeAgent.upgradeFrom() that issues new tokens
 *   -> UpgradeableToken.upgrade() reduces the original total supply based on amount of upgraded tokens
 *
 * Upgrade agent itself can be the token contract, or just a middle man contract doing the heavy lifting.
 */
contract UpgradeAgent {

  uint public originalSupply;

  /** Interface marker */
  function isUpgradeAgent() public constant returns (bool) {
    return true;
  }

  /**
   * Upgrade amount of tokens to a new version.
   *
   * Only callable by UpgradeableToken.
   *
   * @param _tokenHolder Address that wants to upgrade its tokens
   * @param _amount Number of tokens to upgrade. The address may consider to hold back some amount of tokens in the old version.
   */
  function upgradeFrom(address _tokenHolder, uint256 _amount) external;
}


/**
 * A token upgrade mechanism where users can opt-in amount of tokens to the next smart contract revision.
 *
 * First envisioned by Golem and Lunyr projects.
 */
contract UpgradeableToken is StandardToken {

  /** Contract / person who can set the upgrade path. This can be the same as team multisig wallet, as what it is with its default value. */
  address public upgradeMaster;

  /** The next contract where the tokens will be migrated. */
  UpgradeAgent public upgradeAgent;

  /** How many tokens we have upgraded by now. */
  uint256 public totalUpgraded;

  /**
   * Upgrade states.
   *
   * - NotAllowed: The child contract has not reached a condition where the upgrade can bgun
   * - WaitingForAgent: Token allows upgrade, but we don't have a new agent yet
   * - ReadyToUpgrade: The agent is set, but not a single token has been upgraded yet
   * - Upgrading: Upgrade agent is set and the balance holders can upgrade their tokens
   *
   */
  enum UpgradeState {Unknown, NotAllowed, WaitingForAgent, ReadyToUpgrade, Upgrading}

  /**
   * Somebody has upgraded some of his tokens.
   */
  event Upgrade(address indexed _from, address indexed _to, uint256 _value);

  /**
   * New upgrade agent available.
   */
  event UpgradeAgentSet(address agent);

  /**
   * Upgrade master updated.
   */
  event NewUpgradeMaster(address upgradeMaster);

  /**
   * Do not allow construction without upgrade master set.
   */
  function UpgradeableToken(address _upgradeMaster) {
    upgradeMaster = _upgradeMaster;
    NewUpgradeMaster(upgradeMaster);
  }

  /**
   * Allow the token holder to upgrade some of their tokens to a new contract.
   */
  function upgrade(uint256 value) public {

      UpgradeState state = getUpgradeState();
      if(!(state == UpgradeState.ReadyToUpgrade || state == UpgradeState.Upgrading)) {
        // Called in a bad state
        throw;
      }

      // Validate input value.
      if (value == 0) throw;

      balances[msg.sender] = safeSub(balances[msg.sender], value);

      // Take tokens out from circulation
      totalSupply = safeSub(totalSupply, value);
      totalUpgraded = safeAdd(totalUpgraded, value);

      // Upgrade agent reissues the tokens
      upgradeAgent.upgradeFrom(msg.sender, value);
      Upgrade(msg.sender, upgradeAgent, value);
  }

  /**
   * Set an upgrade agent that handles
   */
  function setUpgradeAgent(address agent) external {

      if(!canUpgrade()) {
        // The token is not yet in a state that we could think upgrading
        throw;
      }

      if (agent == 0x0) throw;
      // Only a master can designate the next agent
      if (msg.sender != upgradeMaster) throw;
      // Upgrade has already begun for an agent
      if (getUpgradeState() == UpgradeState.Upgrading) throw;

      upgradeAgent = UpgradeAgent(agent);

      // Bad interface
      if(!upgradeAgent.isUpgradeAgent()) throw;
      // Make sure that token supplies match in source and target
      if (upgradeAgent.originalSupply() != totalSupply) throw;

      UpgradeAgentSet(upgradeAgent);
  }

  /**
   * Get the state of the token upgrade.
   */
  function getUpgradeState() public constant returns(UpgradeState) {
    if(!canUpgrade()) return UpgradeState.NotAllowed;
    else if(address(upgradeAgent) == 0x00) return UpgradeState.WaitingForAgent;
    else if(totalUpgraded == 0) return UpgradeState.ReadyToUpgrade;
    else return UpgradeState.Upgrading;
  }

  /**
   * Change the upgrade master.
   *
   * This allows us to set a new owner for the upgrade mechanism.
   */
  function setUpgradeMaster(address master) public {
      if (master == 0x0) throw;
      if (msg.sender != upgradeMaster) throw;
      upgradeMaster = master;
      NewUpgradeMaster(upgradeMaster);
  }

  /**
   * Child contract can enable to provide the condition when the upgrade can begun.
   */
  function canUpgrade() public constant returns(bool) {
     return true;
  }

}



/**
 * Centrally issued Ethereum token.
 *
 * We mix in burnable and upgradeable traits.
 *
 * Token supply is created in the token contract creation and allocated to owner.
 * The owner can then transfer from its supply to crowdsale participants.
 * The owner, or anybody, can burn any excessive tokens they are holding.
 *
 */
contract CentrallyIssuedToken is UpgradeableToken {

  string public name;
  string public symbol;
  uint public decimals;

  /** Name and symbol were updated. */
  event UpdatedTokenInformation(string newName, string newSymbol);

  function CentrallyIssuedToken(address _owner, string _name, string _symbol, uint _totalSupply, uint _decimals)  UpgradeableToken(_owner) {
    name = _name;
    symbol = _symbol;
    totalSupply = _totalSupply;
    decimals = _decimals;

    // Allocate initial balance to the owner
    balances[_owner] = _totalSupply;
  }

  /**
   * Owner can update token information here.
   *
   * It is often useful to conceal the actual token association, until
   * the token operations, like central issuance or reissuance have been completed.
   * In this case the initial token can be supplied with empty name and symbol information.
   *
   * This function allows the token owner to rename the token after the operations
   * have been completed and then point the audience to use the token contract.
   */
  function setTokenInformation(string _name, string _symbol) {

    if(msg.sender != upgradeMaster) {
      throw;
    }

    if(bytes(name).length > 0 || bytes(symbol).length > 0) {
      // Information already set
      // Allow owner to set this information only once
      throw;
    }

    name = _name;
    symbol = _symbol;
    UpdatedTokenInformation(name, symbol);
  }

}

Contract Security Audit

Contract ABI

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

0000000000000000000000001ea119b57ea945a73ee55a3274f8dc36035774bc00000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000016345785d8a000000000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000005436976696300000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000034356430000000000000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _owner (address): 0x1EA119b57ea945A73Ee55A3274f8DC36035774Bc
Arg [1] : _name (string): Civic
Arg [2] : _symbol (string): CVC
Arg [3] : _totalSupply (uint256): 100000000000000000
Arg [4] : _decimals (uint256): 8

-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 0000000000000000000000001ea119b57ea945a73ee55a3274f8dc36035774bc
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [3] : 000000000000000000000000000000000000000000000000016345785d8a0000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [6] : 4369766963000000000000000000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000003
Arg [8] : 4356430000000000000000000000000000000000000000000000000000000000


Swarm Source

bzzr://fac6c331ef7a8484cbe5a0523b9ee0f3eaaa4bc1ffdb153365548d304f8969be

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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.