ETH Price: $3,298.49 (+0.40%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,981 ( 0.003%)

Market

Price

$24.95 @ 0.007564 ETH (-0.76%)

Onchain Market Cap

$24,950,000,000.00

Circulating Supply Market Cap

$15,947,031,216.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.29313501062200947 LINK

Value
$7.31 ( ~0.00221616553943186 Eth) [0.0000%]
0x278a0dcbdd26093b79360dd68d4c5ea53deedd49
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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 22581.82% |ETH 0.0003846 1866.72%

Market

Volume (24H):$938,993,942.00
Market Capitalization:$15,947,031,216.00
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$24.94
0.0075666 Eth
$116,657,817.00
4,527,616.150 LINK
19.1119%
2
Coinbase Exchange
LINK-USD$24.92
0.0075583 Eth
$57,366,855.00
2,301,856.010 LINK
9.7166%
3
WhiteBIT
LINK-USDT$25.06
0.0075914 Eth
$48,069,671.00
1,918,299.620 LINK
8.0975%
4
Bybit
LINK-USDT$24.91
0.0075591 Eth
$40,255,937.00
1,561,213.811 LINK
6.5902%
5
P2B
LINK-USDT$25.03
0.0075827 Eth
$23,735,598.00
948,346.990 LINK
4.0031%
6
OKX
LINK-USDT$24.95
0.0075691 Eth
$19,244,822.00
747,105.580 LINK
3.1537%
7
HTX
LINK-USDT$24.94
0.0075671 Eth
$18,019,216.00
699,414.234 LINK
2.9524%
8
Gate.io
LINK-USDT$24.91
0.0075598 Eth
$15,936,716.00
617,030.220 LINK
2.6046%
9
DigiFinex
LINK-USDT$24.94
0.0075682 Eth
$14,685,150.00
588,763.580 LINK
2.4853%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.08
0.0076052 Eth
$14,011,354.00
553,444.182 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.3362%
11
XT.COM
LINK-USDT$24.99
0.0075738 Eth
$11,729,065.00
455,054.750 LINK
1.9209%
12
Azbit
LINK-USDT$24.99
0.0075748 Eth
$11,610,751.00
450,620.928 LINK
1.9022%
13
MEXC
LINK-USDT$25.02
0.0075766 Eth
$11,415,812.00
456,270.010 LINK
1.9260%
14
Binance
LINK-FDUSD$24.95
0.0075696 Eth
$10,824,881.00
419,862.700 LINK
1.7723%
15
Coinstore
LINK-USDT$25.04
0.0075889 Eth
$10,296,967.00
399,952.640 LINK
1.6883%
16
Bitunix
LINK-USDT$25.00
0.0075789 Eth
$9,012,888.00
360,395.770 LINK
1.5213%
17
Binance
LINK-USDC$25.09
0.0076056 Eth
$8,864,117.00
343,041.100 LINK
1.4480%
18
KuCoin
LINK-USDT$24.95
0.0075670 Eth
$8,343,216.00
334,403.990 LINK
1.4116%
19
CoinW
LINK-USDT$25.06
0.0075927 Eth
$7,392,314.00
294,999.740 LINK
1.2452%
20
BTSE
LINK-USDT$25.01
0.0075811 Eth
$6,872,236.00
274,775.633 LINK
1.1599%
21
Kraken
LINK-USD$25.00
0.0075869 Eth
$6,645,218.00
265,764.913 LINK
1.1218%
22
BYDFi
LINK-USDT$24.96
0.0075631 Eth
$6,348,411.00
254,358.790 LINK
1.0737%
23
Hotcoin
LINK-USDT$25.02
0.0075795 Eth
$6,027,384.00
240,916.090 LINK
1.0170%
24
LATOKEN
LINK-USDT$25.05
0.0075945 Eth
$5,656,282.00
225,756.984 LINK
0.9530%
25
LBank
LINK-USDT$25.01
0.0075798 Eth
$5,525,980.00
220,934.320 LINK
0.9326%
26
Sushiswap
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.98
0.0075720 Eth
$5,196,771.00
52,398.194 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.2212%
27
QMall
LINK-USDT$24.99
0.0075768 Eth
$4,801,007.00
186,206.371 LINK
0.7860%
28
Coinbase Exchange
LINK-EUR$25.05
0.0075916 Eth
$4,499,796.00
179,626.560 LINK
0.7582%
29
FMCPAY
LINK-USDT$25.06
0.0075919 Eth
$3,807,363.00
148,095.658 LINK
0.6251%
30
Bitvavo
LINK-EUR$25.07
0.0076004 Eth
$3,689,368.00
147,139.507 LINK
0.6211%
31
Dex-Trade
LINK-USDT$24.92
0.0075573 Eth
$3,497,338.00
140,357.660 LINK
0.5925%
32
WhiteBIT
LINK-BTC$24.99
0.0075735 Eth
$2,938,487.00
117,608.870 LINK
0.4964%
33
Coinbase Exchange
LINK-GBP$24.97
0.0075763 Eth
$2,828,969.00
113,299.210 LINK
0.4783%
34
CoinEx
LINK-USDT$25.06
0.0075924 Eth
$2,827,336.00
109,267.237 LINK
0.4612%
35
Biconomy.com
LINK-USDT$24.94
0.0075605 Eth
$2,686,360.00
104,350.200 LINK
0.4405%
36
WhiteBIT
LINK-TRY$25.09
0.0076047 Eth
$2,210,163.00
88,095.890 LINK
0.3719%
37
PointPay
LINK-USDT$24.93
0.0075603 Eth
$1,919,300.00
74,436.671 LINK
0.3142%
38
FMCPAY
LINK-ETH$25.01
0.0075810 Eth
$1,750,933.00
69,289.120 LINK
0.2925%
39
FMCPAY
LINK-BTC$25.01
0.0075760 Eth
$1,663,847.00
64,950.500 LINK
0.2742%
40
Kraken
LINK-EUR$25.07
0.0075982 Eth
$1,632,870.00
65,140.477 LINK
0.2750%
41
tanX
LINK-USDC$24.95
0.0075658 Eth
$1,546,053.00
60,153.320 LINK
0.2539%
42
EXMO
LINK-USDT$24.94
0.0075672 Eth
$1,249,147.00
50,088.430 LINK
0.2114%
43
Phemex
LINK-USDT$25.00
0.0075798 Eth
$1,222,862.00
48,908.730 LINK
0.2065%
44
OKX
LINK-USDC$24.96
0.0075722 Eth
$1,198,304.00
46,672.192 LINK
0.1970%
45
Gemini
LINK-USD$24.95
0.0075692 Eth
$1,091,289.00
43,746.527 LINK
0.1847%
46
Tokpie
LINK-USDT$25.21
0.0076366 Eth
$1,042,560.00
41,350.251 LINK
0.1745%
47
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.01
0.0075829 Eth
$974,196.00
38,545.899 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1627%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.99
0.0075829 Eth
$967,573.00
38,349.269 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1619%
49
EarnBIT
LINK-USDT$24.92
0.0075579 Eth
$923,009.00
35,850.839 LINK
0.1513%
50
BitStorage
LINK-USDT$24.91
0.0075575 Eth
$902,542.00
36,235.920 LINK
0.1530%
51
BigONE
LINK-USDT$24.90
0.0075444 Eth
$884,964.00
35,544.730 LINK
0.1500%
52
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$25.05
0.0076007 Eth
$867,663.00
33,850.603 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1429%
53
Bitbank
LINK-JPY$25.08
0.0076065 Eth
$856,654.00
34,155.556 LINK
0.1442%
54
Binance
LINK-TRY$25.07
0.0076069 Eth
$802,500.00
31,036.290 LINK
0.1310%
55
Bybit
LINK-USDC$24.94
0.0075661 Eth
$796,671.00
30,890.456 LINK
0.1304%
56
Kraken
LINK-USDT$25.07
0.0075935 Eth
$776,079.00
30,961.974 LINK
0.1307%
57
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$25.09
0.0076047 Eth
$767,161.00
29,866.429 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1261%
58
Trubit
LINK-USDT$24.92
0.0075620 Eth
$764,986.00
29,834.850 LINK
0.1259%
59
Binance
LINK-EUR$25.06
0.0075891 Eth
$749,868.00
28,969.380 LINK
0.1223%
60
Coinbase Exchange
LINK-USDT$24.99
0.0075748 Eth
$741,989.00
29,694.980 LINK
0.1253%
61
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.06
0.0076046 Eth
$740,857.00
29,134.820 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1230%
62
QMall
LINK-USDC$24.96
0.0075670 Eth
$708,977.00
27,426.079 LINK
0.1158%
63
WhiteBIT
LINK-EUR$25.11
0.0076058 Eth
$691,322.00
27,536.740 LINK
0.1162%
64
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.08
0.0076028 Eth
$627,292.00
642,130.665 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.7106%
65
Bitkub
LINK-THB$25.25
0.0076540 Eth
$567,625.00
22,478.086 LINK
0.0949%
66
LATOKEN
LINK-BTC$25.00
0.0075738 Eth
$541,721.00
21,666.558 LINK
0.0915%
67
HashKey Exchange
LINK-USD$24.90
0.0075445 Eth
$533,433.00
20,705.805 LINK
0.0874%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.96
0.0075722 Eth
$520,002.00
20,447.438 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0863%
69
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$25.08
0.0076052 Eth
$519,578.00
41,646.559 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1758%
70
Kraken
LINK-XBT$24.93
0.0075574 Eth
$483,931.00
19,413.650 LINK
0.0819%
71
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.08
0.0076025 Eth
$482,012.00
494,606.135 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.0878%
72
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.08
0.0076007 Eth
$408,273.00
15,825.139 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0668%
73
itBit
LINK-USD$24.99
0.0075744 Eth
$353,890.00
14,161.254 LINK
0.0598%
74
Slex
LINK-ETH$25.05
0.0075924 Eth
$343,593.00
13,572.180 LINK
0.0573%
75
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.08
0.0076036 Eth
$326,855.00
12,812.585 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0541%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$25.06
0.0076046 Eth
$322,107.00
12,475.871 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0527%
77
BitDelta
LINK-USDT$24.96
0.0075692 Eth
$307,456.00
11,958.000 LINK
0.0505%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.02
0.0075850 Eth
$300,501.00
11,879.521 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0501%
79
BitMart
LINK-BTC$24.99
0.0075787 Eth
$283,815.00
11,358.060 LINK
0.0479%
80
GMO Japan
LINK-JPY$25.05
0.0075937 Eth
$271,351.00
10,830.800 LINK
0.0457%
81
Coinbase Exchange
LINK-BTC$25.00
0.0075789 Eth
$253,203.00
10,126.190 LINK
0.0427%
82
BitStorage
LINK-ETH$25.06
0.0075924 Eth
$246,806.00
9,848.330 LINK
0.0416%
83
bitcastle
LINK-USDT$24.95
0.0075662 Eth
$239,625.00
9,299.960 LINK
0.0393%
84
Hotcoin
LINK-BTC$24.95
0.0075707 Eth
$224,386.00
8,993.310 LINK
0.0380%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.91
0.0075597 Eth
$204,007.00
210,588.222 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.8889%
86
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.08
0.0076073 Eth
$200,931.00
7,810.472 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0330%
87
Bitso
LINK-USD$24.99
0.0075836 Eth
$196,751.00
7,872.268 LINK
0.0332%
88
PointPay
LINK-BTC$24.98
0.0075736 Eth
$195,025.00
7,588.288 LINK
0.0320%
89
Binance US
LINK-USDT$24.93
0.0075636 Eth
$179,945.00
7,218.764 LINK
0.0305%
90
BYDFi
LINK-USDC$25.05
0.0075939 Eth
$176,125.00
7,030.200 LINK
0.0297%
91
CoinTR
LINK-TRY$25.12
0.0076213 Eth
$169,784.00
6,582.460 LINK
0.0278%
92
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$25.10
0.0076127 Eth
$148,920.00
7,055.789 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0298%
93
Kraken
LINK-USDC$25.09
0.0076131 Eth
$143,140.00
5,704.959 LINK
0.0241%
94
Mercado Bitcoin
LINK-BRL$24.99
0.0075777 Eth
$126,589.00
5,066.416 LINK
0.0214%
95
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.90
0.0075553 Eth
$109,288.00
4,283.796 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0181%
96
BitMart
LINK-ETH$24.99
0.0075790 Eth
$106,310.00
4,254.260 LINK
0.0180%
97
Coinbase Exchange
LINK-ETH$25.03
0.0075937 Eth
$94,578.00
3,779.140 LINK
0.0160%
98
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.05
0.0076000 Eth
$86,607.00
3,425.928 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0145%
99
KuCoin
LINK-BTC$24.97
0.0075742 Eth
$81,096.00
3,247.284 LINK
0.0137%
100
KuCoin
LINK-USDC$25.03
0.0075911 Eth
$75,379.00
3,011.679 LINK
0.0127%

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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