ETH Price: $2,660.64 (-2.82%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

736,413 ( 0.023%)

Market

Price

$17.76 @ 0.006675 ETH (-8.11%)

Onchain Market Cap

$17,760,000,000.00

Circulating Supply Market Cap

$11,325,526,176.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Binance Dep: 0xA9422c6DA3e29F02BdD1DF83Ff578FA52c5BAaB2
Balance
41.4740655 LINK

Value
$736.58 ( ~0.276843110057205 Eth) [0.0000%]
0xA9422c6DA3e29F02BdD1DF83Ff578FA52c5BAaB2
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OVERVIEW

A blockchain-based middleware, acting as a bridge between cryptocurrency smart contracts, data feeds, APIs and traditional bank account payments.

Profitability / Loss

Since Initial Offer Price
:$0.11 16045.45% |ETH 0.0003846 1635.57%

Market

Volume (24H):$689,517,243.00
Market Capitalization:$11,325,526,176.00
Circulating Supply:638,099,970.00 LINK
Market Data Source: Coinmarketcap

ICO Information

ICO Start Date : Sep 19, 2017   
Total Cap : $32,000,000
ICO Price  : $0.11 | 0.0003846 ETH
Country : USA

# Exchange Pair Price  24H Volume % Volume
1
Binance
LINK-USDT$17.80
0.0066854 Eth
$80,288,782.00
4,449,647.210 LINK
17.6417%
2
MEXC
LINK-USDT$17.79
0.0066803 Eth
$46,220,802.00
2,597,999.360 LINK
10.3004%
3
Coinbase Exchange
LINK-USD$17.75
0.0066741 Eth
$30,287,340.00
1,705,944.570 LINK
6.7636%
4
Bybit
LINK-USDT$17.77
0.0066717 Eth
$27,141,011.00
1,500,265.545 LINK
5.9482%
5
HTX
LINK-USDT$17.82
0.0066891 Eth
$19,756,939.00
1,087,891.436 LINK
4.3132%
6
P2B
LINK-USDT$17.79
0.0066777 Eth
$16,000,033.00
899,413.650 LINK
3.5659%
7
Kraken
LINK-USD$17.79
0.0066762 Eth
$13,348,102.00
750,479.022 LINK
2.9755%
8
Bitget
LINK-USDT$17.82
0.0066886 Eth
$11,173,237.00
619,912.320 LINK
2.4578%
9
Slex
LINK-USDT$17.75
0.0066653 Eth
$10,510,821.00
579,800.990 LINK
2.2988%
10
DigiFinex
LINK-USDT$17.81
0.0066850 Eth
$9,768,464.00
548,433.590 LINK
2.1744%
11
MEXC
LINK-EUR$17.81
0.0066952 Eth
$9,695,121.00
544,357.430 LINK
2.1582%
12
Gate.io
LINK-USDT$17.79
0.0066796 Eth
$9,331,326.00
518,658.080 LINK
2.0563%
13
OKX
LINK-USDT$17.81
0.0066857 Eth
$9,240,754.00
510,620.326 LINK
2.0245%
14
MEXC
LINK-USDC$17.59
0.0066422 Eth
$9,129,144.00
518,850.780 LINK
2.0571%
15
KuCoin
LINK-USDT$17.82
0.0066909 Eth
$8,361,075.00
469,075.388 LINK
1.8598%
16
XT.COM
LINK-USDT$17.71
0.0066615 Eth
$7,938,291.00
439,859.170 LINK
1.7439%
17
Coinstore
LINK-USDT$17.80
0.0066827 Eth
$6,859,528.00
380,186.790 LINK
1.5073%
18
CoinW
LINK-USDT$17.78
0.0066764 Eth
$6,242,186.00
351,066.720 LINK
1.3919%
19
Binance
LINK-FDUSD$17.77
0.0066828 Eth
$5,962,230.00
330,794.130 LINK
1.3115%
20
WhiteBIT
LINK-USDT$17.79
0.0066792 Eth
$5,647,686.00
317,387.450 LINK
1.2584%
21
Binance
LINK-USDC$17.76
0.0066822 Eth
$5,218,784.00
290,514.630 LINK
1.1518%
22
Hotcoin
LINK-USDT$17.77
0.0066806 Eth
$4,994,512.00
281,026.410 LINK
1.1142%
23
Azbit
LINK-USDT$17.69
0.0066685 Eth
$4,766,964.00
263,885.348 LINK
1.0462%
24
Bitunix
LINK-USDT$17.78
0.0066748 Eth
$4,620,722.00
259,863.690 LINK
1.0303%
25
BYDFi
LINK-USDT$17.78
0.0066734 Eth
$4,409,779.00
248,087.800 LINK
0.9836%
26
BTSE
LINK-USDT$17.76
0.0066765 Eth
$4,240,705.00
238,772.948 LINK
0.9467%
27
LATOKEN
LINK-USDT$17.78
0.0066770 Eth
$3,791,819.00
213,207.692 LINK
0.8453%
28
Coinbase Exchange
LINK-GBP$17.74
0.0066688 Eth
$3,744,778.00
211,094.580 LINK
0.8369%
29
QMall
LINK-USDT$17.79
0.0066878 Eth
$3,271,344.00
181,360.656 LINK
0.7190%
30
FMCPAY
LINK-USDT$17.76
0.0066783 Eth
$2,907,702.00
160,156.911 LINK
0.6350%
31
Bitvavo
LINK-EUR$17.79
0.0066830 Eth
$2,844,111.00
159,839.882 LINK
0.6337%
32
Dex-Trade
LINK-USDT$17.77
0.0066827 Eth
$2,504,985.00
140,978.800 LINK
0.5589%
33
CoinEx
LINK-USDT$17.76
0.0066794 Eth
$2,339,496.00
130,085.533 LINK
0.5158%
34
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.70
0.0066437 Eth
$2,229,887.00
124,007.255 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4917%
35
Coinbase Exchange
LINK-EUR$17.76
0.0066756 Eth
$2,228,579.00
125,497.320 LINK
0.4976%
36
Binance
LINK-BTC$17.82
0.0066868 Eth
$1,644,118.00
91,519.550 LINK
0.3629%
37
Biconomy.com
LINK-USDT$17.64
0.0066526 Eth
$1,533,337.00
84,406.270 LINK
0.3346%
38
PointPay
LINK-USDT$17.68
0.0066482 Eth
$1,222,353.00
67,787.535 LINK
0.2688%
39
FMCPAY
LINK-BTC$17.59
0.0066236 Eth
$1,201,813.00
66,361.000 LINK
0.2631%
40
Binance
LINK-ETH$17.80
0.0066803 Eth
$1,197,833.00
67,018.110 LINK
0.2657%
41
FMCPAY
LINK-ETH$17.69
0.0066535 Eth
$1,175,315.00
65,217.600 LINK
0.2586%
42
Gemini
LINK-USD$17.79
0.0066780 Eth
$906,334.00
50,945.656 LINK
0.2020%
43
tanX
LINK-USDC$17.71
0.0066595 Eth
$868,013.00
47,700.290 LINK
0.1891%
44
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.70
0.0066467 Eth
$838,814.00
844,170.547 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
3.3469%
45
Phemex
LINK-USDT$17.77
0.0066803 Eth
$828,355.00
46,614.050 LINK
0.1848%
46
EXMO
LINK-USDT$17.79
0.0066797 Eth
$811,719.00
45,623.041 LINK
0.1809%
47
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.85
0.0067007 Eth
$807,102.00
44,163.574 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1751%
48
Trubit
LINK-USDT$17.73
0.0066566 Eth
$801,222.00
44,173.510 LINK
0.1751%
49
WhiteBIT
LINK-BTC$17.71
0.0066620 Eth
$707,160.00
39,921.810 LINK
0.1583%
50
Bitbank
LINK-JPY$17.84
0.0066982 Eth
$670,991.00
37,614.859 LINK
0.1491%
51
BigONE
LINK-USDT$17.74
0.0066696 Eth
$657,336.00
37,049.700 LINK
0.1469%
52
Binance
LINK-EUR$17.77
0.0066708 Eth
$638,619.00
35,426.960 LINK
0.1405%
53
LATOKEN
LINK-BTC$17.76
0.0066690 Eth
$636,025.00
35,805.569 LINK
0.1420%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.59
0.0066079 Eth
$631,716.00
35,398.840 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1403%
55
BitStorage
LINK-USDT$17.67
0.0066621 Eth
$626,668.00
35,472.720 LINK
0.1406%
56
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.69
0.0066438 Eth
$604,368.00
33,903.513 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1344%
57
OKX
LINK-USDC$17.82
0.0066902 Eth
$507,016.00
28,612.617 LINK
0.1134%
58
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.76
0.0066693 Eth
$489,740.00
27,252.844 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1081%
59
itBit
LINK-USD$17.79
0.0066908 Eth
$489,034.00
27,489.273 LINK
0.1090%
60
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.59
0.0066079 Eth
$486,222.00
502,395.640 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.9919%
61
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.79
0.0066790 Eth
$458,612.00
25,108.237 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0995%
62
EarnBIT
LINK-USDT$17.80
0.0066799 Eth
$442,669.00
24,455.610 LINK
0.0970%
63
QMall
LINK-USDC$17.79
0.0066860 Eth
$430,450.00
23,965.179 LINK
0.0950%
64
Binance
LINK-TRY$17.79
0.0066761 Eth
$415,984.00
23,154.630 LINK
0.0918%
65
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.81
0.0066872 Eth
$403,040.00
22,337.742 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0886%
66
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.67
0.0066381 Eth
$390,500.00
41,920.782 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1662%
67
Bybit
LINK-USDC$17.76
0.0066668 Eth
$358,154.00
19,763.343 LINK
0.0784%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.73
0.0066604 Eth
$348,472.00
19,385.829 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0769%
69
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.65
0.0066282 Eth
$331,075.00
18,542.060 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0735%
70
Coinbase Exchange
LINK-USDT$17.79
0.0066911 Eth
$289,622.00
16,282.706 LINK
0.0646%
71
BitDelta
LINK-USDT$17.73
0.0066670 Eth
$285,942.00
15,786.000 LINK
0.0626%
72
BitStorage
LINK-ETH$17.76
0.0066696 Eth
$266,542.00
15,009.780 LINK
0.0595%
73
GMO Japan
LINK-JPY$17.69
0.0066521 Eth
$261,581.00
14,789.200 LINK
0.0586%
74
BitMart
LINK-BTC$17.77
0.0066734 Eth
$241,005.00
13,563.860 LINK
0.0538%
75
Binance US
LINK-USDT$17.76
0.0066766 Eth
$238,270.00
13,415.706 LINK
0.0532%
76
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.79
0.0066811 Eth
$228,981.00
12,655.766 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0502%
77
Slex
LINK-ETH$17.76
0.0066676 Eth
$212,449.00
11,856.440 LINK
0.0470%
78
Bitci TR
LINK-TRY$17.88
0.0067100 Eth
$186,636.00
10,233.430 LINK
0.0406%
79
WhiteBIT
LINK-EUR$17.69
0.0066530 Eth
$184,880.00
10,453.530 LINK
0.0414%
80
Hotcoin
LINK-BTC$17.70
0.0066600 Eth
$178,913.00
10,110.680 LINK
0.0401%
81
bitcastle
LINK-USDT$17.78
0.0066762 Eth
$163,184.00
9,032.600 LINK
0.0358%
82
BYDFi
LINK-USDC$17.65
0.0066534 Eth
$161,722.00
9,162.880 LINK
0.0363%
83
CoinTR
LINK-TRY$17.81
0.0066967 Eth
$161,335.00
8,892.290 LINK
0.0353%
84
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.69
0.0066581 Eth
$149,653.00
8,278.976 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0328%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.79
0.0066799 Eth
$128,406.00
7,111.820 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0282%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.78
0.0066742 Eth
$123,667.00
6,891.005 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0273%
87
Coinbase Exchange
LINK-BTC$17.76
0.0066683 Eth
$121,602.00
6,846.400 LINK
0.0271%
88
Bitget
LINK-USDC$17.79
0.0066777 Eth
$118,500.00
6,519.610 LINK
0.0258%
89
Bitkub
LINK-THB$17.68
0.0066417 Eth
$103,031.00
5,826.332 LINK
0.0231%
90
Bitso
LINK-USD$17.76
0.0066748 Eth
$98,039.00
5,521.511 LINK
0.0219%
91
KuCoin
LINK-USDC$17.78
0.0066740 Eth
$92,537.00
5,204.715 LINK
0.0206%
92
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.63
0.0066205 Eth
$82,911.00
85,938.343 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3407%
93
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.70
0.0066467 Eth
$78,516.00
80,589.281 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3195%
94
WhiteBIT
LINK-TRY$17.74
0.0066750 Eth
$76,120.00
4,289.800 LINK
0.0170%
95
BitMart
LINK-ETH$17.78
0.0066724 Eth
$68,972.00
3,880.220 LINK
0.0154%
96
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.70
0.0066472 Eth
$60,310.00
3,352.857 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0133%
97
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.80
0.0066822 Eth
$60,236.00
3,484.387 0X5947BB275C521040051D82396192181B413227A3
0.0138%
98
Binance
LINK-BRL$17.88
0.0067164 Eth
$51,979.00
2,865.740 LINK
0.0114%
99
Binance
LINK-BNB$17.69
0.0066573 Eth
$51,284.00
2,862.325 LINK
0.0113%
100
Dex-Trade
LINK-ETH$17.73
0.0066648 Eth
$34,459.00
1,943.660 LINK
0.0077%

Contract Source Code Verified (Exact Match)

Contract Name:
LinkToken

Compiler Version
v0.4.16+commit.d7661dd9

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, Audited

Contract Source Code (Solidity)Audit Report

/**
 *Submitted for verification at Etherscan.io on 2017-09-23
*/

pragma solidity ^0.4.16;


/**
 * @title SafeMath
 * @dev Math operations with safety checks that throw on error
 */
library SafeMath {
  function mul(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a * b;
    assert(a == 0 || c / a == b);
    return c;
  }

  function div(uint256 a, uint256 b) internal constant 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 c;
  }

  function sub(uint256 a, uint256 b) internal constant returns (uint256) {
    assert(b <= a);
    return a - b;
  }

  function add(uint256 a, uint256 b) internal constant returns (uint256) {
    uint256 c = a + b;
    assert(c >= a);
    return c;
  }
}


/**
 * @title ERC20Basic
 * @dev Simpler version of ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/179
 */
contract ERC20Basic {
  uint256 public totalSupply;
  function balanceOf(address who) constant returns (uint256);
  function transfer(address to, uint256 value) returns (bool);
  event Transfer(address indexed from, address indexed to, uint256 value);
}
/**
 * @title ERC20 interface
 * @dev see https://github.com/ethereum/EIPs/issues/20
 */
contract ERC20 is ERC20Basic {
  function allowance(address owner, address spender) constant returns (uint256);
  function transferFrom(address from, address to, uint256 value) returns (bool);
  function approve(address spender, uint256 value) returns (bool);
  event Approval(address indexed owner, address indexed spender, uint256 value);
}

contract ERC677 is ERC20 {
  function transferAndCall(address to, uint value, bytes data) returns (bool success);

  event Transfer(address indexed from, address indexed to, uint value, bytes data);
}

contract ERC677Receiver {
  function onTokenTransfer(address _sender, uint _value, bytes _data);
}

/**
 * @title Basic token
 * @dev Basic version of StandardToken, with no allowances. 
 */
contract BasicToken is ERC20Basic {
  using SafeMath for uint256;

  mapping(address => uint256) balances;

  /**
  * @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) returns (bool) {
    balances[msg.sender] = balances[msg.sender].sub(_value);
    balances[_to] = balances[_to].add(_value);
    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) constant returns (uint256 balance) {
    return balances[_owner];
  }

}


/**
 * @title Standard ERC20 token
 *
 * @dev Implementation of the basic standard token.
 * @dev https://github.com/ethereum/EIPs/issues/20
 * @dev Based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol
 */
contract StandardToken is ERC20, BasicToken {

  mapping (address => mapping (address => uint256)) 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) returns (bool) {
    var _allowance = allowed[_from][msg.sender];

    // Check is not needed because sub(_allowance, _value) will already throw if this condition is not met
    // require (_value <= _allowance);

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

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

  function decreaseApproval (address _spender, uint _subtractedValue) 
    returns (bool success) {
    uint oldValue = allowed[msg.sender][_spender];
    if (_subtractedValue > oldValue) {
      allowed[msg.sender][_spender] = 0;
    } else {
      allowed[msg.sender][_spender] = oldValue.sub(_subtractedValue);
    }
    Approval(msg.sender, _spender, allowed[msg.sender][_spender]);
    return true;
  }

}

contract ERC677Token is ERC677 {

  /**
  * @dev transfer token to a contract address with additional data if the recipient is a contact.
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  * @param _data The extra data to be passed to the receiving contract.
  */
  function transferAndCall(address _to, uint _value, bytes _data)
    public
    returns (bool success)
  {
    super.transfer(_to, _value);
    Transfer(msg.sender, _to, _value, _data);
    if (isContract(_to)) {
      contractFallback(_to, _value, _data);
    }
    return true;
  }


  // PRIVATE

  function contractFallback(address _to, uint _value, bytes _data)
    private
  {
    ERC677Receiver receiver = ERC677Receiver(_to);
    receiver.onTokenTransfer(msg.sender, _value, _data);
  }

  function isContract(address _addr)
    private
    returns (bool hasCode)
  {
    uint length;
    assembly { length := extcodesize(_addr) }
    return length > 0;
  }

}

contract LinkToken is StandardToken, ERC677Token {

  uint public constant totalSupply = 10**27;
  string public constant name = 'ChainLink Token';
  uint8 public constant decimals = 18;
  string public constant symbol = 'LINK';

  function LinkToken()
    public
  {
    balances[msg.sender] = totalSupply;
  }

  /**
  * @dev transfer token to a specified address with additional data if the recipient is a contract.
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  * @param _data The extra data to be passed to the receiving contract.
  */
  function transferAndCall(address _to, uint _value, bytes _data)
    public
    validRecipient(_to)
    returns (bool success)
  {
    return super.transferAndCall(_to, _value, _data);
  }

  /**
  * @dev transfer token to a specified address.
  * @param _to The address to transfer to.
  * @param _value The amount to be transferred.
  */
  function transfer(address _to, uint _value)
    public
    validRecipient(_to)
    returns (bool success)
  {
    return super.transfer(_to, _value);
  }

  /**
   * @dev Approve the passed address to spend the specified amount of tokens on behalf of msg.sender.
   * @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
    validRecipient(_spender)
    returns (bool)
  {
    return super.approve(_spender,  _value);
  }

  /**
   * @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
    validRecipient(_to)
    returns (bool)
  {
    return super.transferFrom(_from, _to, _value);
  }


  // MODIFIERS

  modifier validRecipient(address _recipient) {
    require(_recipient != address(0) && _recipient != address(this));
    _;
  }

}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Swarm Source

bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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