ETH Price: $1,598.97 (+0.93%)
Gas: 0.32 Gwei
 

Multichain Info

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Transaction Hash
Method
Block
From
To
Transfer204640322024-08-05 18:03:23256 days ago1722881003IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0004903810.4305885
Transfer204533752024-08-04 6:24:23257 days ago1722752663IN
Bitbounce.com/credo: CREDO Token
0 ETH0.000047021
Approve203194832024-07-16 13:50:47276 days ago1721137847IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0002369.02042415
Transfer203173082024-07-16 6:33:59276 days ago1721111639IN
Bitbounce.com/credo: CREDO Token
0 ETH0.00029948.62183588
Transfer203173032024-07-16 6:32:59276 days ago1721111579IN
Bitbounce.com/credo: CREDO Token
0 ETH0.000446268.61476695
Transfer173333072023-05-25 2:50:59695 days ago1684983059IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0015358832.67691613
Transfer167268312023-02-28 13:03:35780 days ago1677589415IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0025170853.51169854
Transfer167111482023-02-26 8:13:11782 days ago1677399191IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0015771433.5377921
Transfer165068572023-01-28 17:38:11811 days ago1674927491IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0015669145.13773358
Transfer163557642023-01-07 15:20:59832 days ago1673104859IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0004655818.953206
Finalize163557622023-01-07 15:20:35832 days ago1673104835IN
Bitbounce.com/credo: CREDO Token
0 ETH0.4700292716.49225533
Transfer From163557612023-01-07 15:20:23832 days ago1673104823IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0004520716.73355363
Transfer163557452023-01-07 15:17:11832 days ago1673104631IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0003886515.82142399
Transfer From163557432023-01-07 15:16:47832 days ago1673104607IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0004488516.61444352
Approve163557392023-01-07 15:15:59832 days ago1673104559IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0007358715.96711319
Transfer From163557222023-01-07 15:12:35832 days ago1673104355IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0004289415.87744886
Transfer158399252022-10-27 14:11:47904 days ago1666879907IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0009691420.60875
Transfer157617092022-10-16 15:56:11915 days ago1665935771IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0006829514.52663191
Transfer152036532022-07-24 6:14:04999 days ago1658643244IN
Bitbounce.com/credo: CREDO Token
0 ETH0.000160623.1
Transfer145870392022-04-15 1:35:091100 days ago1649986509IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0018288538.91017652
Transfer145120842022-04-03 8:23:401111 days ago1648974220IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0021312945.33310641
Transfer143405722022-03-07 15:40:501138 days ago1646667650IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0016883435.91163439
Approve142397262022-02-20 0:33:581154 days ago1645317238IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0019039678.79686806
Transfer140955222022-01-28 17:28:431176 days ago1643390923IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0070557150
Transfer139007182021-12-29 14:17:571206 days ago1640787477IN
Bitbounce.com/credo: CREDO Token
0 ETH0.0044420894.46017211
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Latest 3 internal transactions

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Parent Transaction Hash Method Block
From
To
Transfer38619642017-06-12 17:23:222867 days ago1497288202
Bitbounce.com/credo: CREDO Token
247.29257228 ETH
Transfer38146982017-06-03 16:23:192876 days ago1496506999
Bitbounce.com/credo: CREDO Token
1 ETH
Transfer38132032017-06-03 9:29:112876 days ago1496482151
Bitbounce.com/credo: CREDO Token
1 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
Credo

Compiler Version
v0.4.9-nightly.2017.1.13+commit.392ef5f4

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
/**
 *Submitted for verification at Etherscan.io on 2017-06-04
*/

pragma solidity ^0.4.8;

// The implementation for the Credo smart contract was inspired by
// the Ethereum token creation tutorial, the FirstBlood token, and the BAT token.

///////////////
// SAFE MATH //
///////////////

contract SafeMath {

    function assert(bool assertion) internal {
        if (!assertion) {
            throw;
        }
    }      // assert no longer needed once solidity is on 0.4.10

    function safeAdd(uint256 x, uint256 y) internal returns(uint256) {
      uint256 z = x + y;
      assert((z >= x) && (z >= y));
      return z;
    }

    function safeSubtract(uint256 x, uint256 y) internal returns(uint256) {
      assert(x >= y);
      uint256 z = x - y;
      return z;
    }

    function safeMult(uint256 x, uint256 y) internal returns(uint256) {
      uint256 z = x * y;
      assert((x == 0)||(z/x == y));
      return z;
    }

}

////////////////////
// STANDARD TOKEN //
////////////////////

contract Token {
    uint256 public totalSupply;
    function balanceOf(address _owner) constant returns (uint256 balance);
    function transfer(address _to, uint256 _value) returns (bool success);
    function transferFrom(address _from, address _to, uint256 _value) returns (bool success);
    function approve(address _spender, uint256 _value) returns (bool success);
    function allowance(address _owner, address _spender) constant returns (uint256 remaining);
    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _owner, address indexed _spender, uint256 _value);
}


/*  ERC 20 token */
contract StandardToken is Token {

    function transfer(address _to, uint256 _value) returns (bool success) {
      if (balances[msg.sender] >= _value && _value > 0) {
        balances[msg.sender] -= _value;
        balances[_to] += _value;
        Transfer(msg.sender, _to, _value);
        return true;
      } else {
        return false;
      }
    }

    function transferFrom(address _from, address _to, uint256 _value) returns (bool success) {
      if (balances[_from] >= _value && allowed[_from][msg.sender] >= _value && _value > 0) {
        balances[_to] += _value;
        balances[_from] -= _value;
        allowed[_from][msg.sender] -= _value;
        Transfer(_from, _to, _value);
        return true;
      } else {
        return false;
      }
    }

    function balanceOf(address _owner) constant returns (uint256 balance) {
        return balances[_owner];
    }

    function approve(address _spender, uint256 _value) returns (bool success) {
        allowed[msg.sender][_spender] = _value;
        Approval(msg.sender, _spender, _value);
        return true;
    }

    function allowance(address _owner, address _spender) constant returns (uint256 remaining) {
      return allowed[_owner][_spender];
    }

    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowed;
}

/////////////////
// CREDO TOKEN //
/////////////////

contract Credo is StandardToken, SafeMath {
    // Descriptive properties
    string public constant name = "Credo Token";
    string public constant symbol = "CREDO";
    uint256 public constant decimals = 18;
    string public version = "1.0";

    // Account for ether proceed.
    address public etherProceedsAccount;

    // Reserve account for the remaining 90% of credos.
    address public credosReserveAccount;
    uint256 public constant credosReserveAllocation = 1350 * (10**6) * 10**decimals;

    // These params specify the start, end, min, and max of the sale.
    bool public isFinalized;
    uint256 public fundingStartBlock;
    uint256 public fundingEndBlock;
    uint256 public constant tokenCreationCap =  1500 * (10**6) * 10**decimals;
    uint256 public constant tokenCreationMin =  1355 * (10**6) * 10**decimals;

    // Setting the exchange rate for the first part of the ICO.
    uint256 public constant credoEthExchangeRate = 100000;

    // Events for logging refunds and token creation.
    event LogRefund(address indexed _to, uint256 _value);
    event CreateCredo(address indexed _to, uint256 _value);

    // constructor
    function Credo(address _etherProceedsAccount, address _credosReserveAccount, uint256 _fundingStartBlock, uint256 _fundingEndBlock)
    {
      isFinalized                    = false;
      etherProceedsAccount           = _etherProceedsAccount;
      credosReserveAccount           = _credosReserveAccount;
      fundingStartBlock              = _fundingStartBlock;
      fundingEndBlock                = _fundingEndBlock;
      totalSupply                    = credosReserveAllocation;
      balances[credosReserveAccount] = credosReserveAllocation;
      CreateCredo(credosReserveAccount, credosReserveAllocation);
    }

    function createTokens() payable external {
      if (isFinalized) throw;
      if (block.number < fundingStartBlock) throw;
      if (block.number > fundingEndBlock) throw;
      if (msg.value == 0) throw;

      uint256 tokens = safeMult(msg.value, credoEthExchangeRate);
      uint256 checkedSupply = safeAdd(totalSupply, tokens);

      if (tokenCreationCap < checkedSupply) throw;

      totalSupply = checkedSupply;
      balances[msg.sender] += tokens;
      CreateCredo(msg.sender, tokens);
    }

    function finalize() external {
      if (isFinalized) throw;
      if (msg.sender != etherProceedsAccount) throw;
      if (totalSupply < tokenCreationMin) throw;
      if (block.number <= fundingEndBlock && totalSupply != tokenCreationCap) throw;

      isFinalized = true;

      if (!etherProceedsAccount.send(this.balance)) throw;
    }

    function refund() external {
      if (isFinalized) throw;
      if (block.number <= fundingEndBlock) throw;
      if (totalSupply >= tokenCreationMin) throw;
      if (msg.sender == credosReserveAccount) throw;
      uint256 credoVal = balances[msg.sender];
      if (credoVal == 0) throw;
      balances[msg.sender] = 0;
      totalSupply = safeSubtract(totalSupply, credoVal);
      uint256 ethVal = credoVal / credoEthExchangeRate;
      LogRefund(msg.sender, ethVal);
      if (!msg.sender.send(ethVal)) throw;
    }

}

Contract Security Audit

Contract ABI

API
[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"credosReserveAllocation","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"finalize","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"version","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"refund","outputs":[],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"credoEthExchangeRate","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"tokenCreationCap","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"credosReserveAccount","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"isFinalized","outputs":[{"name":"","type":"bool"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"fundingEndBlock","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"success","type":"bool"}],"payable":false,"type":"function"},{"constant":false,"inputs":[],"name":"createTokens","outputs":[],"payable":true,"type":"function"},{"constant":true,"inputs":[],"name":"tokenCreationMin","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"fundingStartBlock","outputs":[{"name":"","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"remaining","type":"uint256"}],"payable":false,"type":"function"},{"constant":true,"inputs":[],"name":"etherProceedsAccount","outputs":[{"name":"","type":"address"}],"payable":false,"type":"function"},{"inputs":[{"name":"_etherProceedsAccount","type":"address"},{"name":"_credosReserveAccount","type":"address"},{"name":"_fundingStartBlock","type":"uint256"},{"name":"_fundingEndBlock","type":"uint256"}],"payable":false,"type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"LogRefund","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"CreateCredo","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_from","type":"address"},{"indexed":true,"name":"_to","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"_owner","type":"address"},{"indexed":true,"name":"_spender","type":"address"},{"indexed":false,"name":"_value","type":"uint256"}],"name":"Approval","type":"event"}]

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Deployed Bytecode

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

000000000000000000000000cc2de4acf7af057f51fc8b4f9fd7a6a09d5a2b0d00000000000000000000000025ca1529e389b2ac8ddf61431704e836f17b55be00000000000000000000000000000000000000000000000000000000003a24bf00000000000000000000000000000000000000000000000000000000003aeb00

-----Decoded View---------------
Arg [0] : _etherProceedsAccount (address): 0xCC2De4Acf7aF057f51FC8B4f9fd7a6A09D5A2B0D
Arg [1] : _credosReserveAccount (address): 0x25Ca1529E389b2AC8dDF61431704E836f17B55be
Arg [2] : _fundingStartBlock (uint256): 3810495
Arg [3] : _fundingEndBlock (uint256): 3861248

-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 000000000000000000000000cc2de4acf7af057f51fc8b4f9fd7a6a09d5a2b0d
Arg [1] : 00000000000000000000000025ca1529e389b2ac8ddf61431704e836f17b55be
Arg [2] : 00000000000000000000000000000000000000000000000000000000003a24bf
Arg [3] : 00000000000000000000000000000000000000000000000000000000003aeb00


Swarm Source

bzzr://194027c4718b6459a2a365439dc1ba090e71ed8ba136dc9318210808dd3f646d

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Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

Credo is the token you earn when someone you don’t know sends you an unsolicited email. You can use the Credo you earn to send your own emails to people you don’t know, trade it for other currencies, or hold onto it as its power increases.

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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.