ETH Price: $2,656.75 (-4.54%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,988 ( 0.007%)

Market

Price

$16.28 @ 0.006128 ETH (-7.57%)

Onchain Market Cap

$16,280,000,000.00

Circulating Supply Market Cap

$10,412,184,525.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x47c1e331b0862fcef6193689438729fdf25ce695
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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 14700% |ETH 0.0003846 1493.34%

Market

Volume (24H):$468,445,060.00
Market Capitalization:$10,412,184,525.00
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
WhiteBIT
LINK-USDT$16.36
0.0061450 Eth
$46,327,634.00
2,831,302.750 LINK
15.1556%
2
Binance
LINK-USDT$16.36
0.0061290 Eth
$45,734,749.00
2,701,161.230 LINK
14.4590%
3
MEXC
LINK-USDT$16.31
0.0061254 Eth
$26,762,508.00
1,641,269.640 LINK
8.7855%
4
Coinbase Exchange
LINK-USD$16.29
0.0061186 Eth
$15,430,201.00
947,335.500 LINK
5.0710%
5
HTX
LINK-USDT$16.28
0.0061222 Eth
$13,588,739.00
795,455.234 LINK
4.2580%
6
Upbit
LINK-KRW$16.65
0.0062691 Eth
$13,479,953.00
809,763.129 LINK
4.3346%
7
Bybit
LINK-USDT$16.21
0.0061060 Eth
$10,658,066.00
629,882.998 LINK
3.3717%
8
P2B
LINK-USDT$16.40
0.0061462 Eth
$9,073,874.00
553,261.950 LINK
2.9615%
9
Gate.io
LINK-USDT$16.16
0.0060839 Eth
$8,074,220.00
481,742.460 LINK
2.5787%
10
KuCoin
LINK-USDT$16.15
0.0060804 Eth
$7,929,090.00
490,980.365 LINK
2.6282%
11
Bitget
LINK-USDT$16.19
0.0060970 Eth
$7,160,221.00
423,584.704 LINK
2.2674%
12
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$16.35
0.0061459 Eth
$6,772,773.00
408,518.327 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.1868%
13
DigiFinex
LINK-USDT$16.19
0.0060976 Eth
$5,827,932.00
359,939.320 LINK
1.9267%
14
OKX
LINK-USDT$16.22
0.0061075 Eth
$5,433,120.00
322,084.604 LINK
1.7241%
15
Binance
LINK-FDUSD$16.36
0.0061320 Eth
$5,178,565.00
306,108.710 LINK
1.6386%
16
XT.COM
LINK-USDT$16.29
0.0061256 Eth
$4,852,723.00
287,566.620 LINK
1.5393%
17
MEXC
LINK-EUR$16.31
0.0061288 Eth
$4,625,934.00
283,704.770 LINK
1.5186%
18
MEXC
LINK-USDC$16.17
0.0060872 Eth
$4,491,466.00
277,805.810 LINK
1.4871%
19
Hotcoin
LINK-USDT$16.31
0.0061271 Eth
$4,152,147.00
254,560.850 LINK
1.3626%
20
Coinstore
LINK-USDT$16.28
0.0061168 Eth
$4,130,926.00
244,459.510 LINK
1.3086%
21
LBank
LINK-USDT$16.26
0.0061137 Eth
$4,010,141.00
246,633.010 LINK
1.3202%
22
CoinW
LINK-USDT$16.34
0.0061396 Eth
$3,559,619.00
217,853.470 LINK
1.1661%
23
Kraken
LINK-USD$16.18
0.0060907 Eth
$2,964,520.00
183,257.605 LINK
0.9810%
24
Bitunix
LINK-USDT$16.32
0.0061281 Eth
$2,773,607.00
170,046.990 LINK
0.9102%
25
Azbit
LINK-USDT$16.33
0.0061325 Eth
$2,763,045.00
163,437.443 LINK
0.8749%
26
BTSE
LINK-USDT$16.25
0.0061098 Eth
$2,724,534.00
167,671.341 LINK
0.8975%
27
BYDFi
LINK-USDT$16.30
0.0061226 Eth
$2,524,095.00
154,842.630 LINK
0.8289%
28
LATOKEN
LINK-USDT$16.29
0.0061188 Eth
$2,210,178.00
135,668.324 LINK
0.7262%
29
FMCPAY
LINK-USDT$16.26
0.0061147 Eth
$2,055,690.00
120,654.947 LINK
0.6459%
30
Bithumb
LINK-KRW$16.58
0.0062413 Eth
$2,040,683.00
123,104.874 LINK
0.6590%
31
QMall
LINK-USDT$16.35
0.0061406 Eth
$1,978,981.00
117,127.939 LINK
0.6270%
32
Dex-Trade
LINK-USDT$16.27
0.0061103 Eth
$1,510,035.00
92,833.886 LINK
0.4969%
33
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.22
0.0061078 Eth
$1,408,087.00
85,600.902 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4582%
34
Bitvavo
LINK-EUR$16.29
0.0061253 Eth
$1,265,782.00
77,689.183 LINK
0.4159%
35
Biconomy.com
LINK-USDT$16.30
0.0061257 Eth
$1,221,521.00
71,556.920 LINK
0.3830%
36
CoinEx
LINK-USDT$16.36
0.0061447 Eth
$1,174,958.00
69,267.031 LINK
0.3708%
37
Coinbase Exchange
LINK-EUR$16.21
0.0061037 Eth
$1,087,757.00
67,098.590 LINK
0.3592%
38
FMCPAY
LINK-BTC$16.29
0.0061187 Eth
$947,807.00
55,894.300 LINK
0.2992%
39
FMCPAY
LINK-ETH$16.31
0.0061259 Eth
$934,452.00
56,456.800 LINK
0.3022%
40
Trubit
LINK-USDT$16.32
0.0061247 Eth
$885,207.00
51,620.040 LINK
0.2763%
41
Coinbase Exchange
LINK-GBP$16.19
0.0060949 Eth
$836,601.00
51,680.430 LINK
0.2766%
42
PointPay
LINK-USDT$16.28
0.0061222 Eth
$756,188.00
44,801.931 LINK
0.2398%
43
tanX
LINK-USDC$16.27
0.0061182 Eth
$647,770.00
38,061.130 LINK
0.2037%
44
Bitbank
LINK-JPY$16.34
0.0061363 Eth
$606,670.00
37,138.798 LINK
0.1988%
45
EXMO
LINK-USDT$16.17
0.0060895 Eth
$523,524.00
32,369.075 LINK
0.1733%
46
BigONE
LINK-USDT$16.32
0.0061290 Eth
$522,582.00
32,024.630 LINK
0.1714%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$16.38
0.0061599 Eth
$480,838.00
28,512.776 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1526%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$16.32
0.0061370 Eth
$435,418.00
26,260.200 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1406%
49
Gemini
LINK-USD$16.19
0.0060955 Eth
$417,535.00
25,796.047 LINK
0.1381%
50
WhiteBIT
LINK-BTC$16.52
0.0061684 Eth
$397,770.00
24,078.760 LINK
0.1289%
51
LATOKEN
LINK-BTC$16.28
0.0061204 Eth
$386,131.00
23,721.845 LINK
0.1270%
52
BitStorage
LINK-USDT$16.33
0.0061363 Eth
$363,294.00
22,245.900 LINK
0.1191%
53
QMall
LINK-USDC$16.35
0.0061404 Eth
$334,302.00
19,732.766 LINK
0.1056%
54
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.39
0.0061605 Eth
$309,604.00
321,598.575 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7215%
55
XT.COM
LINK-ETH$16.31
0.0061273 Eth
$301,114.00
18,200.300 LINK
0.0974%
56
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.30
0.0061381 Eth
$285,909.00
17,324.119 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0927%
57
Coinone
LINK-KRW$16.57
0.0062401 Eth
$279,606.00
16,874.461 LINK
0.0903%
58
BitMart
LINK-BTC$16.26
0.0061250 Eth
$271,810.00
16,712.060 LINK
0.0895%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.38
0.0061573 Eth
$253,825.00
15,289.118 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0818%
60
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$16.22
0.0061078 Eth
$243,993.00
14,348.388 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0768%
61
BitStorage
LINK-ETH$16.32
0.0061302 Eth
$240,033.00
14,708.660 LINK
0.0787%
62
GMO Japan
LINK-JPY$16.31
0.0061300 Eth
$238,321.00
14,613.200 LINK
0.0782%
63
Slex
LINK-ETH$16.29
0.0061269 Eth
$235,725.00
14,232.840 LINK
0.0762%
64
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$16.31
0.0061295 Eth
$222,515.00
26,463.381 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1417%
65
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$16.32
0.0061341 Eth
$217,739.00
13,117.960 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0702%
66
Bybit
LINK-USDC$16.18
0.0060947 Eth
$202,501.00
11,907.833 LINK
0.0637%
67
BitDelta
LINK-USDT$16.31
0.0061291 Eth
$181,283.00
10,625.000 LINK
0.0569%
68
Coinbase Exchange
LINK-BTC$16.32
0.0061291 Eth
$180,460.00
11,060.140 LINK
0.0592%
69
Bitci TR
LINK-TRY$16.65
0.0062296 Eth
$172,701.00
10,037.960 LINK
0.0537%
70
OKX
LINK-USDC$16.22
0.0061135 Eth
$172,441.00
10,250.002 LINK
0.0549%
71
Bybit
LINK-EUR$16.21
0.0061051 Eth
$162,216.00
9,700.550 LINK
0.0519%
72
Kraken
LINK-GBP$16.21
0.0061044 Eth
$157,433.00
9,710.164 LINK
0.0520%
73
CoinTR
LINK-TRY$16.30
0.0061258 Eth
$154,126.00
8,986.330 LINK
0.0481%
74
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.34
0.0061433 Eth
$153,214.00
9,257.001 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0496%
75
Coinbase Exchange
LINK-ETH$16.53
0.0062150 Eth
$152,782.00
9,243.250 LINK
0.0495%
76
Bitkub
LINK-THB$16.40
0.0061615 Eth
$151,712.00
9,249.260 LINK
0.0495%
77
Hotcoin
LINK-BTC$16.18
0.0060905 Eth
$141,249.00
8,731.900 LINK
0.0467%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.33
0.0061409 Eth
$140,113.00
8,466.572 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0453%
79
BYDFi
LINK-USDC$16.49
0.0061633 Eth
$121,085.00
7,344.610 LINK
0.0393%
80
KuCoin
LINK-USDC$16.16
0.0060838 Eth
$116,632.00
7,217.971 LINK
0.0386%
81
Coinbase Exchange
LINK-USDT$16.17
0.0060785 Eth
$115,099.00
7,119.155 LINK
0.0381%
82
bitcastle
LINK-USDT$16.27
0.0061177 Eth
$104,473.00
6,172.310 LINK
0.0330%
83
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.10
0.0060531 Eth
$98,938.00
6,222.361 0X5947BB275C521040051D82396192181B413227A3
0.0333%
84
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$16.32
0.0061324 Eth
$96,808.00
5,657.855 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0303%
85
BitMart
LINK-ETH$16.23
0.0061127 Eth
$94,342.00
5,812.260 LINK
0.0311%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$16.42
0.0061721 Eth
$72,121.00
4,351.418 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0233%
87
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$16.28
0.0061325 Eth
$70,093.00
4,168.349 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0223%
88
Kanga
LINK-PLN$16.45
0.0061838 Eth
$63,021.00
0.000 LINK
0.0000%
89
Bitso
LINK-USD$16.52
0.0061693 Eth
$49,846.00
3,018.204 LINK
0.0162%
90
Binance US
LINK-USDT$16.49
0.0061664 Eth
$47,310.00
2,868.938 LINK
0.0154%
91
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$16.23
0.0061134 Eth
$47,160.00
49,647.704 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2658%
92
Hotcoin
LINK-ETH$16.22
0.0061065 Eth
$39,645.00
2,444.390 LINK
0.0131%
93
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.20
0.0061026 Eth
$39,273.00
2,447.467 0X5947BB275C521040051D82396192181B413227A3
0.0131%
94
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.29
0.0061320 Eth
$38,481.00
40,415.384 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2163%
95
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.29
0.0061320 Eth
$37,784.00
2,292.412 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0123%
96
Dex-Trade
LINK-ETH$16.56
0.0061906 Eth
$30,831.00
1,862.290 LINK
0.0100%
97
Bitexen
LINK-TRY$16.17
0.0060803 Eth
$28,739.00
1,777.070 LINK
0.0095%
98
Mercado Bitcoin
LINK-BRL$16.30
0.0061283 Eth
$28,468.00
1,746.088 LINK
0.0093%
99
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$16.27
0.0061153 Eth
$27,172.00
1,603.620 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0086%
100
Korbit
LINK-KRW$16.60
0.0062532 Eth
$24,384.00
1,399.007 LINK
0.0075%

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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