ETH Price: $3,474.59 (+5.05%)
Gas: 5.28 Gwei

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

726,868 ( 0.032%)

Market

Price

$25.04 @ 0.007207 ETH (+8.78%)

Onchain Market Cap

$25,040,000,000.00

Circulating Supply Market Cap

$15,820,830,859.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
1,007.52118261 LINK

Value
$25,228.33 ( ~7.2608 Eth) [0.0001%]
0xaaaaf5291981e1ebb7f1961934551d4c3da9514e
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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 22663.64% |ETH 0.0003846 1773.89%

Market

Volume (24H):$1,046,596,018.00
Market Capitalization:$15,820,830,859.00
Circulating Supply:631,099,972.00 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
Coinbase Exchange
LINK-USD$24.98
0.0071976 Eth
$73,527,131.00
2,942,968.740 LINK
13.2164%
2
Upbit
LINK-KRW$25.15
0.0072369 Eth
$47,905,016.00
1,904,463.856 LINK
8.5527%
3
Bybit
LINK-USDT$25.01
0.0071944 Eth
$38,401,301.00
1,581,445.981 LINK
7.1020%
4
Slex
LINK-USDT$25.01
0.0072039 Eth
$24,486,267.00
1,015,044.260 LINK
4.5584%
5
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.02
0.0072079 Eth
$19,968,222.00
809,710.211 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.6363%
6
OKX
LINK-USDT$25.01
0.0071945 Eth
$18,030,189.00
745,914.913 LINK
3.3498%
7
DigiFinex
LINK-USDT$25.01
0.0071948 Eth
$16,853,750.00
673,935.400 LINK
3.0265%
8
Gate.io
LINK-USDT$25.00
0.0071917 Eth
$16,518,463.00
685,428.280 LINK
3.0782%
9
HTX
LINK-USDT$25.00
0.0071915 Eth
$15,490,435.00
641,434.182 LINK
2.8806%
10
Binance
LINK-FDUSD$25.02
0.0072124 Eth
$14,936,782.00
617,001.720 LINK
2.7709%
11
MEXC
LINK-USDT$25.01
0.0072091 Eth
$12,879,622.00
515,008.730 LINK
2.3128%
12
FameEX
LINK-USDT$25.00
0.0071949 Eth
$12,863,180.00
532,489.750 LINK
2.3913%
13
Azbit
LINK-USDT$25.12
0.0072263 Eth
$12,785,028.00
529,618.136 LINK
2.3784%
14
XT.COM
LINK-USDT$25.06
0.0072195 Eth
$12,779,377.00
529,106.670 LINK
2.3761%
15
Coinstore
LINK-USDT$25.02
0.0071963 Eth
$11,597,890.00
480,342.680 LINK
2.1571%
16
Hotcoin
LINK-USDT$25.03
0.0072093 Eth
$10,956,720.00
437,782.290 LINK
1.9660%
17
Binance
LINK-USDC$25.01
0.0071946 Eth
$10,354,903.00
427,310.380 LINK
1.9190%
18
Bitunix
LINK-USDT$25.02
0.0072094 Eth
$10,219,332.00
408,448.170 LINK
1.8343%
19
Bithumb
LINK-KRW$25.17
0.0072423 Eth
$10,034,384.00
398,590.831 LINK
1.7900%
20
CoinW
LINK-USDT$25.05
0.0072160 Eth
$9,216,229.00
367,945.770 LINK
1.6524%
21
KuCoin
LINK-USDT$24.99
0.0071882 Eth
$7,626,319.00
305,204.248 LINK
1.3706%
22
BYDFi
LINK-USDT$25.03
0.0072078 Eth
$7,476,529.00
298,711.000 LINK
1.3415%
23
Kraken
LINK-USD$25.00
0.0071917 Eth
$7,309,727.00
292,408.748 LINK
1.3132%
24
BTSE
LINK-USDT$25.05
0.0072190 Eth
$6,719,831.00
268,301.680 LINK
1.2049%
25
LBank
LINK-USDT$25.16
0.0072343 Eth
$6,592,843.00
262,063.880 LINK
1.1769%
26
LATOKEN
LINK-USDT$25.04
0.0072183 Eth
$6,411,009.00
256,038.886 LINK
1.1498%
27
Binance
LINK-BTC$25.04
0.0072174 Eth
$6,183,668.00
251,618.610 LINK
1.1300%
28
QMall
LINK-USDT$25.04
0.0072144 Eth
$5,182,548.00
214,355.655 LINK
0.9626%
29
Dex-Trade
LINK-USDT$25.02
0.0071974 Eth
$4,273,183.00
170,792.720 LINK
0.7670%
30
FMCPAY
LINK-USDT$25.15
0.0072338 Eth
$3,804,209.00
157,181.922 LINK
0.7059%
31
Coinbase Exchange
LINK-EUR$25.00
0.0071930 Eth
$3,765,378.00
150,590.000 LINK
0.6763%
32
CoinEx
LINK-USDT$25.02
0.0072074 Eth
$3,400,193.00
140,074.346 LINK
0.6291%
33
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.97
0.0071941 Eth
$3,134,203.00
127,211.938 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5713%
34
Biconomy.com
LINK-USDT$25.01
0.0071995 Eth
$2,467,123.00
102,116.760 LINK
0.4586%
35
PointPay
LINK-USDT$25.04
0.0072084 Eth
$2,064,333.00
85,459.836 LINK
0.3838%
36
Kraken
LINK-EUR$25.04
0.0072038 Eth
$2,001,051.00
79,912.719 LINK
0.3589%
37
AscendEX (BitMax)
LINK-USDT$24.87
0.0071536 Eth
$1,839,646.00
73,978.700 LINK
0.3322%
38
FMCPAY
LINK-ETH$25.00
0.0071927 Eth
$1,817,489.00
73,748.000 LINK
0.3312%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.01
0.0071985 Eth
$1,753,646.00
71,180.530 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3197%
40
Coinbase Exchange
LINK-GBP$24.98
0.0071852 Eth
$1,621,182.00
64,906.790 LINK
0.2915%
41
FMCPAY
LINK-BTC$25.15
0.0072321 Eth
$1,610,819.00
65,545.800 LINK
0.2944%
42
BigONE
LINK-USDT$25.07
0.0072272 Eth
$1,588,529.00
63,371.510 LINK
0.2846%
43
EXMO
LINK-USDT$25.04
0.0072029 Eth
$1,423,043.00
56,833.737 LINK
0.2552%
44
Phemex
LINK-USDT$25.00
0.0071917 Eth
$1,378,871.00
55,155.500 LINK
0.2477%
45
Binance
LINK-TRY$25.05
0.0072194 Eth
$1,269,086.00
52,489.770 LINK
0.2357%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.97
0.0071858 Eth
$1,220,811.00
49,526.101 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2224%
47
itBit
LINK-USD$25.14
0.0072320 Eth
$1,209,435.00
48,107.984 LINK
0.2160%
48
Bitbank
LINK-JPY$25.05
0.0072061 Eth
$1,200,932.00
47,944.754 LINK
0.2153%
49
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$25.02
0.0072079 Eth
$1,188,053.00
77,460.956 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3479%
50
Binance
LINK-EUR$25.00
0.0071938 Eth
$1,107,447.00
45,748.570 LINK
0.2055%
51
BitStorage
LINK-USDT$24.99
0.0071888 Eth
$1,085,152.00
43,423.990 LINK
0.1950%
52
Binance
LINK-ETH$25.02
0.0071987 Eth
$1,082,752.00
43,979.920 LINK
0.1975%
53
Coinbase Exchange
LINK-USDT$25.01
0.0072004 Eth
$945,928.00
37,824.907 LINK
0.1699%
54
Trubit
LINK-USDT$25.00
0.0071941 Eth
$931,055.00
38,587.620 LINK
0.1733%
55
Kraken
LINK-USDT$25.03
0.0072008 Eth
$901,883.00
36,032.427 LINK
0.1618%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$25.00
0.0071913 Eth
$886,752.00
36,712.349 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1649%
57
Bybit
LINK-USDC$25.06
0.0072104 Eth
$884,287.00
36,505.302 LINK
0.1639%
58
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.00
0.0071939 Eth
$863,255.00
35,041.240 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1574%
59
Coinbase Exchange
LINK-ETH$24.99
0.0071901 Eth
$855,083.00
34,212.680 LINK
0.1536%
60
AscendEX (BitMax)
LINK-BTC$24.89
0.0071605 Eth
$847,086.00
34,031.300 LINK
0.1528%
61
Gemini
LINK-USD$24.95
0.0071784 Eth
$839,106.00
33,630.495 LINK
0.1510%
62
EarnBIT
LINK-USDT$25.05
0.0072159 Eth
$832,767.00
34,434.509 LINK
0.1546%
63
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$25.01
0.0072054 Eth
$832,004.00
34,239.619 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1538%
64
QMall
LINK-USDC$25.01
0.0071946 Eth
$811,751.00
33,482.948 LINK
0.1504%
65
tanX
LINK-USDC$25.04
0.0072149 Eth
$758,734.00
31,540.460 LINK
0.1416%
66
LATOKEN
LINK-BTC$24.99
0.0071891 Eth
$631,311.00
25,262.855 LINK
0.1135%
67
Kraken
LINK-ETH$25.10
0.0072205 Eth
$553,934.00
22,070.623 LINK
0.0991%
68
Coinbase Exchange
LINK-BTC$25.01
0.0072036 Eth
$549,746.00
21,976.820 LINK
0.0987%
69
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.98
0.0071881 Eth
$516,038.00
498,548.599 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.2389%
70
GMO Japan
LINK-JPY$25.05
0.0072091 Eth
$511,466.00
20,417.500 LINK
0.0917%
71
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.98
0.0071878 Eth
$501,700.00
485,209.209 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.1790%
72
Bitkub
LINK-THB$25.05
0.0072201 Eth
$465,078.00
18,568.197 LINK
0.0834%
73
Bitso
LINK-USD$25.01
0.0072066 Eth
$436,857.00
17,465.770 LINK
0.0784%
74
Coinone
LINK-KRW$25.17
0.0072408 Eth
$436,198.00
17,331.599 LINK
0.0778%
75
OKX
LINK-USDC$25.02
0.0071970 Eth
$409,393.00
16,894.187 LINK
0.0759%
76
Hotcoin
LINK-BTC$25.03
0.0072109 Eth
$386,880.00
15,456.650 LINK
0.0694%
77
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$25.07
0.0072160 Eth
$325,483.00
13,337.135 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0599%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.97
0.0071870 Eth
$321,785.00
13,055.468 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0586%
79
BYDFi
LINK-USDC$25.06
0.0072102 Eth
$320,154.00
12,774.160 LINK
0.0574%
80
BitDelta
LINK-USDT$25.01
0.0071948 Eth
$293,600.00
12,153.000 LINK
0.0546%
81
BitMart
LINK-BTC$25.01
0.0071967 Eth
$289,280.00
11,564.560 LINK
0.0519%
82
BitStorage
LINK-ETH$25.09
0.0072339 Eth
$278,886.00
11,113.270 LINK
0.0499%
83
Slex
LINK-ETH$25.06
0.0072243 Eth
$274,519.00
11,172.340 LINK
0.0502%
84
Binance US
LINK-USDT$25.03
0.0072112 Eth
$274,208.00
10,955.871 LINK
0.0492%
85
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.05
0.0072201 Eth
$273,543.00
11,271.526 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0506%
86
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.91
0.0071744 Eth
$247,218.00
10,025.639 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0450%
87
PointPay
LINK-BTC$25.00
0.0071923 Eth
$242,233.00
9,848.230 LINK
0.0442%
88
BTCMarkets
LINK-AUD$25.11
0.0072339 Eth
$198,476.00
7,903.356 LINK
0.0355%
89
KuCoin
LINK-USDC$24.98
0.0071850 Eth
$178,099.00
7,130.623 LINK
0.0320%
90
Binance
LINK-BNB$25.03
0.0072014 Eth
$176,951.00
7,321.133 LINK
0.0329%
91
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.03
0.0072097 Eth
$176,336.00
7,301.813 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0328%
92
Kraken
LINK-GBP$24.97
0.0071828 Eth
$174,123.00
6,974.033 LINK
0.0313%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.11
0.0072263 Eth
$168,977.00
6,898.291 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0310%
94
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.07
0.0072212 Eth
$150,119.00
6,055.997 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0272%
95
Bitcointry
LINK-USDT$25.19
0.0072635 Eth
$132,992.00
5,520.783 LINK
0.0248%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$24.98
0.0071881 Eth
$132,754.00
5,495.172 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0247%
97
Hotcoin
LINK-ETH$25.03
0.0072143 Eth
$129,539.00
5,174.790 LINK
0.0232%
98
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.97
0.0071941 Eth
$120,072.00
4,894.991 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0220%
99
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$25.13
0.0072374 Eth
$114,794.00
110,540.796 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4964%
100
BitMart
LINK-ETH$24.98
0.0071875 Eth
$101,768.00
4,073.600 LINK
0.0183%

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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