ETH Price: $3,703.83 (+3.06%)

Token

OriginToken (OGN)
 

Overview

Max Total Supply

1,409,664,846 OGN

Holders

46,436 ( -0.004%)

Market

Price

$0.14 @ 0.000038 ETH (+5.49%)

Onchain Market Cap

$195,932,136.28

Circulating Supply Market Cap

$95,238,444.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.45875 OGN

Value
$0.06 ( ~1.61994529763519E-05 Eth) [0.0000%]
0xcbc6d27dd9ad183faf892637c67d274c617b4d78
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OVERVIEW

Origin Protocol is a platform for creating decentralized marketplaces on the blockchain.

Market

Volume (24H):$14,704,877.00
Market Capitalization:$95,238,444.00
Circulating Supply:685,942,178.00 OGN
Market Data Source: Coinmarketcap

# Exchange Pair Price  24H Volume % Volume
1
Binance
OGN-USDT$0.1389
0.0000375 Eth
$2,955,835.00
21,983,371.000 OGN
20.5532%
2
Bibox
OGN-USDT$0.139
0.0000375 Eth
$2,293,353.00
16,495,600.000 OGN
15.4225%
3
Nami.Exchange
OGN-VNST$0.1397
0.0000377 Eth
$1,995,295.00
14,284,405.000 OGN
13.3551%
4
Nami.Exchange
OGN-USDT$0.139
0.0000375 Eth
$1,962,823.00
14,125,092.000 OGN
13.2062%
5
WhiteBIT
OGN-USDT$0.139
0.0000375 Eth
$1,312,667.00
9,446,298.260 OGN
8.8318%
6
Hotcoin
OGN-USDT$0.1383
0.0000373 Eth
$386,835.00
2,797,778.000 OGN
2.6158%
7
Coinbase Exchange
OGN-USD$0.1389
0.0000375 Eth
$364,460.00
2,623,900.380 OGN
2.4532%
8
BtcTurk | Kripto
OGN-TRY$0.1388
0.0000375 Eth
$331,016.00
2,384,342.600 OGN
2.2292%
9
Paribu
OGN-TRY$0.1377
0.0000371 Eth
$329,485.00
2,393,189.500 OGN
2.2375%
10
Bitunix
OGN-USDT$0.139
0.0000375 Eth
$308,817.00
2,220,162.000 OGN
2.0757%
11
KuCoin
OGN-USDT$0.1388
0.0000375 Eth
$243,271.00
1,752,442.491 OGN
1.6384%
12
Binance
OGN-TRY$0.139
0.0000375 Eth
$242,460.00
1,798,022.000 OGN
1.6811%
13
Bitcointry
OGN-USDT$0.1389
0.0000375 Eth
$220,506.00
1,647,108.300 OGN
1.5400%
14
HTX
OGN-USDT$0.139
0.0000375 Eth
$184,441.00
1,376,521.531 OGN
1.2870%
15
CoinTR
OGN-TRY$0.1387
0.0000374 Eth
$152,333.00
1,134,202.000 OGN
1.0604%
16
CoinCatch
OGN-USDT$0.139
0.0000375 Eth
$146,557.00
1,092,117.014 OGN
1.0211%
17
Bithumb
OGN-KRW$0.1369
0.0000369 Eth
$132,021.00
964,596.217 OGN
0.9018%
18
Bitrue
OGN-USDC$0.1387
0.0000374 Eth
$121,698.00
877,379.000 OGN
0.8203%
19
Bitrue
OGN-USDT$0.1391
0.0000375 Eth
$114,026.00
819,913.000 OGN
0.7666%
20
Bitget
OGN-USDT$0.1389
0.0000375 Eth
$112,243.00
836,522.437 OGN
0.7821%
21
Aerodrome (Base)
0XDBFEFD2E8460A6EE4955A68582F85708BAEA60A3-0X7002458B1DF59ECCB57387BC79FFC7C29E22E6F7$0.1334
0.0000360 Eth
$112,055.00
29.959 0XDBFEFD2E8460A6EE4955A68582F85708BAEA60A3
0.0000%
22
BtcTurk | Kripto
OGN-USDT$0.1387
0.0000374 Eth
$100,501.00
724,772.859 OGN
0.6776%
23
Gate.io
OGN-USDT$0.1384
0.0000373 Eth
$94,416.00
702,306.220 OGN
0.6566%
24
Uniswap V3 (Ethereum)
0X8207C1FFC5B6804F6024322CCF34F29C3541AE26-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.138
0.0000373 Eth
$89,576.00
659,794.973 0X8207C1FFC5B6804F6024322CCF34F29C3541AE26
0.6169%
25
Bitvavo
OGN-EUR$0.1387
0.0000374 Eth
$80,602.00
581,174.107 OGN
0.5434%
26
BingX
OGN-USDT$0.1389
0.0000375 Eth
$69,670.00
518,689.269 OGN
0.4849%
27
CoinTR
OGN-USDT$0.1379
0.0000372 Eth
$67,214.00
501,867.000 OGN
0.4692%
28
Bilaxy
OGN-ETH$0.1306
0.0000352 Eth
$61,704.00
472,632.000 OGN
0.4419%
29
Tapbit
OGN-USDT$0.1389
0.0000374 Eth
$61,487.00
459,230.000 OGN
0.4294%
30
Upbit
OGN-BTC$0.1385
0.0000374 Eth
$52,495.00
378,953.037 OGN
0.3543%
31
Upbit Indonesia
OGN-BTC$0.1387
0.0000374 Eth
$50,042.00
360,875.443 OGN
0.3374%
32
BloFin
OGN-USDT$0.1386
0.0000374 Eth
$37,272.00
278,068.000 OGN
0.2600%
33
WEEX
OGN-USDT$0.1391
0.0000375 Eth
$36,668.00
273,265.000 OGN
0.2555%
34
MEXC
OGN-USDT$0.1389
0.0000375 Eth
$33,612.00
241,963.930 OGN
0.2262%
35
Binance
OGN-BTC$0.1385
0.0000374 Eth
$26,125.00
193,354.000 OGN
0.1808%
36
Crypto.com Exchange
OGN-USD$0.1386
0.0000374 Eth
$20,617.00
148,774.000 OGN
0.1391%
37
Pionex
OGN-USDT$0.139
0.0000375 Eth
$16,143.29
120,046.540 OGN
0.1122%
38
Kraken
OGN-EUR$0.139
0.0000375 Eth
$15,308.73
110,138.752 OGN
0.1030%
39
Kraken
OGN-USD$0.1392
0.0000376 Eth
$14,905.28
107,078.187 OGN
0.1001%
40
Bit2Me
OGN-EUR$0.1379
0.0000372 Eth
$14,444.47
106,889.962 OGN
0.0999%
41
LATOKEN
OGN-BTC$0.1395
0.0000376 Eth
$11,711.68
83,929.952 OGN
0.0785%
42
LATOKEN
OGN-USDT$0.139
0.0000375 Eth
$8,883.85
63,899.639 OGN
0.0597%
43
DeGate
0X8207C1FFC5B6804F6024322CCF34F29C3541AE26-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$0.139
0.0000375 Eth
$8,848.14
66,126.200 0X8207C1FFC5B6804F6024322CCF34F29C3541AE26
0.0618%
44
ProBit Global
OGN-BTC$0.1366
0.0000369 Eth
$7,337.55
53,719.783 OGN
0.0502%
45
CoinEx
OGN-USDT$0.1391
0.0000375 Eth
$7,230.73
53,937.905 OGN
0.0504%
46
Tothemoon
OGN-USDT$0.1377
0.0000371 Eth
$4,299.15
31,232.000 OGN
0.0292%
47
CoinDCX
OGN-INR$0.1433
0.0000386 Eth
$3,639.87
0.000 OGN
0.0000%
48
KuCoin
OGN-BTC$0.1387
0.0000374 Eth
$2,661.79
19,187.949 OGN
0.0179%
49
CoinJar Exchange
OGN-USD$0.1377
0.0000371 Eth
$1,500.93
10,900.000 OGN
0.0102%
50
CoinJar Exchange
OGN-AUD$0.136
0.0000367 Eth
$1,169.75
8,600.000 OGN
0.0080%
51
Aerodrome (Base)
0X7002458B1DF59ECCB57387BC79FFC7C29E22E6F7-0X4200000000000000000000000000000000000006$0.1316
0.0000355 Eth
$554.43
4,231.337 0X7002458B1DF59ECCB57387BC79FFC7C29E22E6F7
0.0040%
52
Binance US
OGN-USDT$0.1363
0.0000368 Eth
$411.47
3,019.497 OGN
0.0028%
53
TokoCrypto
OGN-USDT$0.1382
0.0000373 Eth
$367.53
2,659.831 OGN
0.0025%
54
Uniswap V2 (Ethereum)
0X8207C1FFC5B6804F6024322CCF34F29C3541AE26-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$0.1317
0.0000355 Eth
$353.22
2,645.692 0X8207C1FFC5B6804F6024322CCF34F29C3541AE26
0.0025%
55
CoinJar Exchange
OGN-USDC$0.1271
0.0000382 Eth
$317.70
2,500.000 OGN
0.0023%
56
CoinJar Exchange
OGN-GBP$0.1376
0.0000371 Eth
$316.58
2,300.000 OGN
0.0022%
57
Indodax
OGN-IDR$0.1374
0.0000371 Eth
$312.11
2,271.387 OGN
0.0021%
58
Pionex
OGN-BTC$0.1386
0.0000374 Eth
$284.88
2,109.000 OGN
0.0020%
59
Mercado Bitcoin
OGN-BRL$0.1342
0.0000362 Eth
$264.12
1,967.639 OGN
0.0018%
60
GoPax
OGN-KRW$0.1168
0.0000315 Eth
$180.24
1,543.142 OGN
0.0014%
61
Gate.io
OGN-ETH$0.1256
0.0000352 Eth
$86.12
685.652 OGN
0.0006%
62
BitMart
OGN-USDT$0.1351
0.0000364 Eth
$70.56
522.400 OGN
0.0005%
63
Nominex
OGN-USDT$0.1239
0.0000364 Eth
$64.59
521.517 OGN
0.0005%
64
TokoCrypto
OGN-BTC$0.1221
0.0000354 Eth
$58.13
476.122 OGN
0.0004%
65
Coinone
OGN-KRW$0.1338
0.0000361 Eth
$55.66
416.030 OGN
0.0004%
66
CEX.IO
OGN-USDT$0.1391
0.0000375 Eth
$54.26
404.260 OGN
0.0004%
67
CEX.IO
OGN-EUR$0.1396
0.0000377 Eth
$38.41
285.360 OGN
0.0003%
68
CEX.IO
OGN-USD$0.1392
0.0000376 Eth
$30.48
225.910 OGN
0.0002%
69
Bittime
OGN-IDR$0.1389
0.0000374 Eth
$29.04
216.600 OGN
0.0002%
70
HitBTC
OGN-BTC$0.1034
0.0000281 Eth
$8.27
80.000 OGN
0.0001%
71
FMFW.io
OGN-BTC$0.1034
0.0000281 Eth
$8.27
80.000 OGN
0.0001%
72
Poloniex
OGN-USDT$0.1231
0.0000343 Eth
$6.85
55.703 OGN
0.0001%
73
ProBit Global
OGN-USDT$0.1218
0.0000328 Eth
$5.85
48.023 OGN
0.0000%
74
Gate.io
OGN-TRY$0.1363
0.0000368 Eth
$5.39
40.116 OGN
0.0000%
75
HitBTC
OGN-USDT$0.1401
0.0000378 Eth
$0.3027
2.100 OGN
0.0000%
76
FMFW.io
OGN-USDT$0.14
0.0000378 Eth
$0.2941
2.100 OGN
0.0000%

Contract Source Code Verified (Exact Match)

Contract Name:
OriginToken

Compiler Version
v0.4.24+commit.e67f0147

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2018-10-04
*/

pragma solidity ^0.4.24;
// produced by the Solididy File Flattener (c) David Appleton 2018
// contact : [email protected]
// released under Apache 2.0 licence
contract ERC20Basic {
  function totalSupply() public view returns (uint256);
  function balanceOf(address who) public view returns (uint256);
  function transfer(address to, uint256 value) public returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}

contract Ownable {
  address public owner;


  event OwnershipRenounced(address indexed previousOwner);
  event OwnershipTransferred(
    address indexed previousOwner,
    address indexed newOwner
  );


  /**
   * @dev The Ownable constructor sets the original `owner` of the contract to the sender
   * account.
   */
  constructor() public {
    owner = msg.sender;
  }

  /**
   * @dev Throws if called by any account other than the owner.
   */
  modifier onlyOwner() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Allows the current owner to relinquish control of the contract.
   */
  function renounceOwnership() public onlyOwner {
    emit OwnershipRenounced(owner);
    owner = address(0);
  }

  /**
   * @dev Allows the current owner to transfer control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function transferOwnership(address _newOwner) public onlyOwner {
    _transferOwnership(_newOwner);
  }

  /**
   * @dev Transfers control of the contract to a newOwner.
   * @param _newOwner The address to transfer ownership to.
   */
  function _transferOwnership(address _newOwner) internal {
    require(_newOwner != address(0));
    emit OwnershipTransferred(owner, _newOwner);
    owner = _newOwner;
  }
}

library SafeMath {

  /**
  * @dev Multiplies two numbers, throws on overflow.
  */
  function mul(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // Gas optimization: this is cheaper than asserting 'a' not being zero, but the
    // benefit is lost if 'b' is also tested.
    // See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
    if (a == 0) {
      return 0;
    }

    c = a * b;
    assert(c / a == b);
    return c;
  }

  /**
  * @dev Integer division of two numbers, truncating the quotient.
  */
  function div(uint256 a, uint256 b) internal pure returns (uint256) {
    // assert(b > 0); // Solidity automatically throws when dividing by 0
    // uint256 c = a / b;
    // assert(a == b * c + a % b); // There is no case in which this doesn't hold
    return a / b;
  }

  /**
  * @dev Subtracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
  */
  function sub(uint256 a, uint256 b) internal pure returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  /**
  * @dev Adds two numbers, throws on overflow.
  */
  function add(uint256 a, uint256 b) internal pure returns (uint256 c) {
    c = a + b;
    assert(c >= a);
    return c;
  }
}

contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender)
    public view returns (uint256);

  function transferFrom(address from, address to, uint256 value)
    public returns (bool);

  function approve(address spender, uint256 value) public returns (bool);
  event Approval(
    address indexed owner,
    address indexed spender,
    uint256 value
  );
}

contract Pausable is Ownable {
  event Pause();
  event Unpause();

  bool public paused = false;


  /**
   * @dev Modifier to make a function callable only when the contract is not paused.
   */
  modifier whenNotPaused() {
    require(!paused);
    _;
  }

  /**
   * @dev Modifier to make a function callable only when the contract is paused.
   */
  modifier whenPaused() {
    require(paused);
    _;
  }

  /**
   * @dev called by the owner to pause, triggers stopped state
   */
  function pause() onlyOwner whenNotPaused public {
    paused = true;
    emit Pause();
  }

  /**
   * @dev called by the owner to unpause, returns to normal state
   */
  function unpause() onlyOwner whenPaused public {
    paused = false;
    emit Unpause();
  }
}

contract DetailedERC20 is ERC20 {
  string public name;
  string public symbol;
  uint8 public decimals;

  constructor(string _name, string _symbol, uint8 _decimals) public {
    name = _name;
    symbol = _symbol;
    decimals = _decimals;
  }
}

contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  uint256 totalSupply_;

  /**
  * @dev total number of tokens in existence
  */
  function totalSupply() public view returns (uint256) {
    return totalSupply_;
  }

  /**
  * @dev transfer token for a specified address
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint256 _value) public returns (bool) {
    require(_to != address(0));
    require(_value <= balances[msg.sender]);

    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    emit Transfer(msg.sender, _to, _value);
    return true;
  }

  /**
  * @dev Gets the balance of the specified address.
  * @param _owner The address to query the the balance of.
  * @return An uint256 representing the amount owned by the passed address.
  */
  function balanceOf(address _owner) public view returns (uint256) {
    return balances[_owner];
  }

}

contract BurnableToken is BasicToken {

  event Burn(address indexed burner, uint256 value);

  /**
   * @dev Burns a specific amount of tokens.
   * @param _value The amount of token to be burned.
   */
  function burn(uint256 _value) public {
    _burn(msg.sender, _value);
  }

  function _burn(address _who, uint256 _value) internal {
    require(_value <= balances[_who]);
    // no need to require value <= totalSupply, since that would imply the
    // sender's balance is greater than the totalSupply, which *should* be an assertion failure

    balances[_who] = balances[_who].sub(_value);
    totalSupply_ = totalSupply_.sub(_value);
    emit Burn(_who, _value);
    emit Transfer(_who, address(0), _value);
  }
}

contract StandardToken is ERC20, BasicToken {

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


  /**
   * @dev Transfer tokens from one address to another
   * @param _from address The address which you want to send tokens from
   * @param _to address The address which you want to transfer to
   * @param _value uint256 the amount of tokens to be transferred
   */
  function transferFrom(
    address _from,
    address _to,
    uint256 _value
  )
    public
    returns (bool)
  {
    require(_to != address(0));
    require(_value <= balances[_from]);
    require(_value <= allowed[_from][msg.sender]);

    balances[_from] = balances[_from].sub(_value);
    balances[_to] = balances[_to].add(_value);
    allowed[_from][msg.sender] = allowed[_from][msg.sender].sub(_value);
    emit Transfer(_from, _to, _value);
    return true;
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   *
   * 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
   * @param _spender The address which will spend the funds.
   * @param _value The amount of tokens to be spent.
   */
  function approve(address _spender, uint256 _value) public returns (bool) {
    allowed[msg.sender][_spender] = _value;
    emit Approval(msg.sender, _spender, _value);
    return true;
  }

  /**
   * @dev Function to check the amount of tokens that an owner allowed to a spender.
   * @param _owner address The address which owns the funds.
   * @param _spender address The address which will spend the funds.
   * @return A uint256 specifying the amount of tokens still available for the spender.
   */
  function allowance(
    address _owner,
    address _spender
   )
    public
    view
    returns (uint256)
  {
    return allowed[_owner][_spender];
  }

  /**
   * @dev Increase the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To increment
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _addedValue The amount of tokens to increase the allowance by.
   */
  function increaseApproval(
    address _spender,
    uint _addedValue
  )
    public
    returns (bool)
  {
    allowed[msg.sender][_spender] = (
      allowed[msg.sender][_spender].add(_addedValue));
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

  /**
   * @dev Decrease the amount of tokens that an owner allowed to a spender.
   *
   * approve should be called when allowed[_spender] == 0. To decrement
   * allowed value is better to use this function to avoid 2 calls (and wait until
   * the first transaction is mined)
   * From MonolithDAO Token.sol
   * @param _spender The address which will spend the funds.
   * @param _subtractedValue The amount of tokens to decrease the allowance by.
   */
  function decreaseApproval(
    address _spender,
    uint _subtractedValue
  )
    public
    returns (bool)
  {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    emit Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

contract PausableToken is StandardToken, Pausable {

  function transfer(
    address _to,
    uint256 _value
  )
    public
    whenNotPaused
    returns (bool)
  {
    return super.transfer(_to, _value);
  }

  function transferFrom(
    address _from,
    address _to,
    uint256 _value
  )
    public
    whenNotPaused
    returns (bool)
  {
    return super.transferFrom(_from, _to, _value);
  }

  function approve(
    address _spender,
    uint256 _value
  )
    public
    whenNotPaused
    returns (bool)
  {
    return super.approve(_spender, _value);
  }

  function increaseApproval(
    address _spender,
    uint _addedValue
  )
    public
    whenNotPaused
    returns (bool success)
  {
    return super.increaseApproval(_spender, _addedValue);
  }

  function decreaseApproval(
    address _spender,
    uint _subtractedValue
  )
    public
    whenNotPaused
    returns (bool success)
  {
    return super.decreaseApproval(_spender, _subtractedValue);
  }
}

contract MintableToken is StandardToken, Ownable {
  event Mint(address indexed to, uint256 amount);
  event MintFinished();

  bool public mintingFinished = false;


  modifier canMint() {
    require(!mintingFinished);
    _;
  }

  modifier hasMintPermission() {
    require(msg.sender == owner);
    _;
  }

  /**
   * @dev Function to mint tokens
   * @param _to The address that will receive the minted tokens.
   * @param _amount The amount of tokens to mint.
   * @return A boolean that indicates if the operation was successful.
   */
  function mint(
    address _to,
    uint256 _amount
  )
    hasMintPermission
    canMint
    public
    returns (bool)
  {
    totalSupply_ = totalSupply_.add(_amount);
    balances[_to] = balances[_to].add(_amount);
    emit Mint(_to, _amount);
    emit Transfer(address(0), _to, _amount);
    return true;
  }

  /**
   * @dev Function to stop minting new tokens.
   * @return True if the operation was successful.
   */
  function finishMinting() onlyOwner canMint public returns (bool) {
    mintingFinished = true;
    emit MintFinished();
    return true;
  }
}

contract WhitelistedPausableToken is PausableToken {
    // UNIX timestamp (in seconds) after which this whitelist no longer applies
    uint256 public whitelistExpiration;
    // While the whitelist is active, either the sender or recipient must be
    // in allowedTransactors.
    mapping (address => bool) public allowedTransactors;

    event SetWhitelistExpiration(uint256 expiration);
    event AllowedTransactorAdded(address sender);
    event AllowedTransactorRemoved(address sender);

    //
    // Functions for maintaining whitelist
    //

    modifier allowedTransfer(address _from, address _to) {
        require(
            // solium-disable-next-line operator-whitespace
            !whitelistActive() ||
            allowedTransactors[_from] ||
            allowedTransactors[_to],
            "neither sender nor recipient are allowed"
        );
        _;
    }

    function whitelistActive() public view returns (bool) {
        return block.timestamp < whitelistExpiration;
    }

    function addAllowedTransactor(address _transactor) public onlyOwner {
        emit AllowedTransactorAdded(_transactor);
        allowedTransactors[_transactor] = true;
    }

    function removeAllowedTransactor(address _transactor) public onlyOwner {
        emit AllowedTransactorRemoved(_transactor);
        delete allowedTransactors[_transactor];
    }

    /**
    * @dev Set the whitelist expiration, after which the whitelist no longer
    * applies.
    */
    function setWhitelistExpiration(uint256 _expiration) public onlyOwner {
        // allow only if whitelist expiration hasn't yet been set, or if the
        // whitelist expiration hasn't passed yet
        require(
            whitelistExpiration == 0 || whitelistActive(),
            "an expired whitelist cannot be extended"
        );
        // prevent possible mistakes in calling this function
        require(
            _expiration >= block.timestamp + 1 days,
            "whitelist expiration not far enough into the future"
        );
        emit SetWhitelistExpiration(_expiration);
        whitelistExpiration = _expiration;
    }

    //
    // ERC20 transfer functions that have been overridden to enforce the
    // whitelist.
    //

    function transfer(
        address _to,
        uint256 _value
    )
        public
        allowedTransfer(msg.sender, _to)
        returns (bool)
    {
        return super.transfer(_to, _value);
    }

    function transferFrom(
        address _from,
        address _to,
        uint256 _value
    )
    public
        allowedTransfer(_from, _to)
    returns (bool)
    {
        return super.transferFrom(_from, _to, _value);
    }
}

contract OriginToken is BurnableToken, MintableToken, WhitelistedPausableToken, DetailedERC20 {
    event AddCallSpenderWhitelist(address enabler, address spender);
    event RemoveCallSpenderWhitelist(address disabler, address spender);

    mapping (address => bool) public callSpenderWhitelist;

    // @dev Constructor that gives msg.sender all initial tokens.
    constructor(uint256 _initialSupply) DetailedERC20("OriginToken", "OGN", 18) public {
        owner = msg.sender;
        mint(owner, _initialSupply);
    }

    //
    // Burn methods
    //

    // @dev Burns tokens belonging to the sender
    // @param _value Amount of token to be burned
    function burn(uint256 _value) public onlyOwner {
        // TODO: add a function & modifier to enable for all accounts without doing
        // a contract migration?
        super.burn(_value);
    }

    // @dev Burns tokens belonging to the specified address
    // @param _who The account whose tokens we're burning
    // @param _value Amount of token to be burned
    function burn(address _who, uint256 _value) public onlyOwner {
        _burn(_who, _value);
    }

    //
    // approveAndCall methods
    //

    // @dev Add spender to whitelist of spenders for approveAndCall
    // @param _spender Address to add
    function addCallSpenderWhitelist(address _spender) public onlyOwner {
        callSpenderWhitelist[_spender] = true;
        emit AddCallSpenderWhitelist(msg.sender, _spender);
    }

    // @dev Remove spender from whitelist of spenders for approveAndCall
    // @param _spender Address to remove
    function removeCallSpenderWhitelist(address _spender) public onlyOwner {
        delete callSpenderWhitelist[_spender];
        emit RemoveCallSpenderWhitelist(msg.sender, _spender);
    }

    // @dev Approve transfer of tokens and make a contract call in a single
    // @dev transaction. This allows a DApp to avoid requiring two MetaMask
    // @dev approvals for a single logical action, such as creating a listing,
    // @dev which requires the seller to approve a token transfer and the
    // @dev marketplace contract to transfer tokens from the seller.
    //
    // @dev This is based on the ERC827 function approveAndCall and avoids
    // @dev security issues by only working with a whitelisted set of _spender
    // @dev addresses. The other difference is that the combination of this
    // @dev function ensures that the proxied function call receives the
    // @dev msg.sender for this function as its first parameter.
    //
    // @param _spender The address that will spend the funds.
    // @param _value The amount of tokens to be spent.
    // @param _selector Function selector for function to be called.
    // @param _callParams Packed, encoded parameters, omitting the first parameter which is always msg.sender
    function approveAndCallWithSender(
        address _spender,
        uint256 _value,
        bytes4 _selector,
        bytes _callParams
    )
        public
        payable
        returns (bool)
    {
        require(_spender != address(this), "token contract can't be approved");
        require(callSpenderWhitelist[_spender], "spender not in whitelist");

        require(super.approve(_spender, _value), "approve failed");

        bytes memory callData = abi.encodePacked(_selector, uint256(msg.sender), _callParams);
        // solium-disable-next-line security/no-call-value
        require(_spender.call.value(msg.value)(callData), "proxied call failed");
        return true;
    }
}

Contract Security Audit

Contract ABI

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

0000000000000000000000000000000000000000033b2e3c9fd0803ce8000000

-----Decoded View---------------
Arg [0] : _initialSupply (uint256): 1000000000000000000000000000

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000033b2e3c9fd0803ce8000000


Swarm Source

bzzr://a1f23bff07bb597b5589c638de2919d4ce0fbc00cabdca1bde3ce5d034fde43a
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