ETH Price: $2,491.42 (-0.84%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,375 ( 0.000%)

Market

Price

$11.17 @ 0.004483 ETH (-1.52%)

Onchain Market Cap

$11,170,000,000.00

Circulating Supply Market Cap

$7,004,574,695.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x1ebf5c5fe0196ee6db17604334872c6ca0645c5c
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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 10054.55% |ETH 0.0003846 1065.63%

Market

Volume (24H):$354,168,112.00
Market Capitalization:$7,004,574,695.00
Circulating Supply:626,849,971.00 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$11.18
0.0044869 Eth
$25,783,274.00
2,304,115.630 LINK
16.9995%
2
Bitget
LINK-USDT$11.19
0.0044910 Eth
$9,100,926.00
810,868.714 LINK
5.9825%
3
Bybit
LINK-USDT$11.19
0.0044914 Eth
$8,220,680.00
734,007.117 LINK
5.4154%
4
Coinbase Exchange
LINK-USD$11.19
0.0044905 Eth
$7,543,947.00
674,409.680 LINK
4.9757%
5
BTSE
LINK-USDT$11.19
0.0044929 Eth
$5,450,997.00
487,044.307 LINK
3.5934%
6
Slex
LINK-USDT$11.18
0.0044868 Eth
$5,413,846.00
482,223.320 LINK
3.5578%
7
P2B
LINK-USDT$11.15
0.0044783 Eth
$5,373,820.00
482,082.930 LINK
3.5568%
8
OKX
LINK-USDT$11.18
0.0044892 Eth
$5,328,977.00
475,392.707 LINK
3.5074%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.13
0.0044678 Eth
$4,530,597.00
404,870.930 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.9871%
10
Azbit
LINK-USDT$11.15
0.0044802 Eth
$4,000,986.00
357,285.230 LINK
2.6360%
11
WEEX
LINK-USDT$11.18
0.0044848 Eth
$3,766,995.00
335,967.820 LINK
2.4787%
12
Ourbit
LINK-USDT$11.18
0.0044877 Eth
$3,742,480.00
334,090.130 LINK
2.4649%
13
Biconomy.com
LINK-USDT$11.19
0.0044906 Eth
$3,623,469.00
323,022.420 LINK
2.3832%
14
DigiFinex
LINK-USDT$11.18
0.0044898 Eth
$3,503,670.00
313,266.460 LINK
2.3112%
15
Crypto.com Exchange
LINK-USDT$11.18
0.0044885 Eth
$3,209,414.00
287,043.140 LINK
2.1178%
16
BVOX
LINK-USDT$11.18
0.0044880 Eth
$3,167,776.00
282,376.570 LINK
2.0833%
17
Binance
LINK-ETH$11.17
0.0044814 Eth
$2,806,307.00
251,514.160 LINK
1.8556%
18
Deepcoin
LINK-USDT$11.18
0.0044870 Eth
$2,632,086.00
236,003.620 LINK
1.7412%
19
XT.COM
LINK-USDT$11.17
0.0044825 Eth
$2,579,675.00
230,556.960 LINK
1.7010%
20
FameEX
LINK-USDT$11.18
0.0044889 Eth
$2,574,824.00
230,083.983 LINK
1.6975%
21
Gate.io
LINK-USDT$11.18
0.0044885 Eth
$2,514,981.00
224,931.790 LINK
1.6595%
22
Crypto.com Exchange
LINK-USD$11.18
0.0044865 Eth
$2,488,939.00
222,703.910 LINK
1.6431%
23
Bitunix
LINK-USDT$11.17
0.0044845 Eth
$2,350,728.00
210,391.340 LINK
1.5522%
24
Hotcoin
LINK-USDT$11.18
0.0044868 Eth
$2,052,665.00
183,645.810 LINK
1.3549%
25
C-Patex
LINK-USDT$11.18
0.0044862 Eth
$1,943,076.00
173,799.703 LINK
1.2823%
26
CoinW
LINK-USDT$11.17
0.0044841 Eth
$1,757,859.00
157,362.430 LINK
1.1610%
27
Coinstore
LINK-USDT$11.18
0.0044860 Eth
$1,740,866.00
155,620.510 LINK
1.1482%
28
KuCoin
LINK-USDT$11.19
0.0044923 Eth
$1,733,516.00
154,905.364 LINK
1.1429%
29
AscendEX (BitMax)
LINK-USDT$11.15
0.0044746 Eth
$1,730,941.00
155,285.000 LINK
1.1457%
30
LBank
LINK-USDT$11.19
0.0044910 Eth
$1,623,366.00
145,103.940 LINK
1.0706%
31
WhiteBIT
LINK-BTC$11.14
0.0044763 Eth
$1,461,948.00
131,183.150 LINK
0.9679%
32
BYDFi
LINK-USDT$11.16
0.0044818 Eth
$1,254,144.00
112,408.720 LINK
0.8293%
33
Kraken
LINK-USD$11.17
0.0044841 Eth
$1,223,419.00
109,527.252 LINK
0.8081%
34
Niza Global
LINK-USD$11.16
0.0044819 Eth
$1,170,993.00
104,847.658 LINK
0.7736%
35
Trubit
LINK-USDT$11.17
0.0044845 Eth
$1,011,872.00
90,278.870 LINK
0.6661%
36
HashKey Global
LINK-USDT$11.18
0.0044865 Eth
$915,539.00
81,133.655 LINK
0.5986%
37
Dex-Trade
LINK-USDT$11.16
0.0044824 Eth
$828,712.00
74,277.740 LINK
0.5480%
38
XT.COM
LINK-ETH$11.17
0.0044842 Eth
$785,706.00
70,465.640 LINK
0.5199%
39
Azbit
LINK-ETH$11.16
0.0044818 Eth
$744,975.00
66,741.358 LINK
0.4924%
40
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.15
0.0044771 Eth
$584,604.00
52,375.435 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3864%
41
Bitvavo
LINK-EUR$11.24
0.0045124 Eth
$520,879.00
46,333.092 LINK
0.3418%
42
LATOKEN
LINK-USDT$11.16
0.0044780 Eth
$491,724.00
44,072.120 LINK
0.3252%
43
EXMO
LINK-USDT$11.19
0.0044934 Eth
$477,427.00
42,653.169 LINK
0.3147%
44
PointPay
LINK-USDT$11.18
0.0044869 Eth
$431,793.00
38,588.289 LINK
0.2847%
45
Coinbase Exchange
LINK-USDT$11.17
0.0044824 Eth
$408,084.00
36,539.696 LINK
0.2696%
46
Bybit
LINK-USDC$11.18
0.0044878 Eth
$369,213.00
32,925.234 LINK
0.2429%
47
CoinEx
LINK-USDT$11.17
0.0044859 Eth
$365,249.00
32,638.872 LINK
0.2408%
48
Pionex
LINK-USDT$11.18
0.0044856 Eth
$356,621.00
31,855.000 LINK
0.2350%
49
tanX
LINK-USDC$11.16
0.0044811 Eth
$342,244.00
30,472.080 LINK
0.2248%
50
LATOKEN
LINK-BTC$11.18
0.0044864 Eth
$315,091.00
28,189.091 LINK
0.2080%
51
Phemex
LINK-USDT$11.18
0.0044869 Eth
$261,299.00
23,378.380 LINK
0.1725%
52
WhiteBIT
LINK-EUR$11.20
0.0044945 Eth
$261,255.00
23,331.590 LINK
0.1721%
53
Niza Global
LINK-EUR$11.20
0.0045007 Eth
$245,386.00
21,836.372 LINK
0.1611%
54
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.12
0.0044626 Eth
$235,695.00
21,095.375 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1556%
55
BigONE
LINK-USDT$11.14
0.0044716 Eth
$219,483.00
19,700.330 LINK
0.1453%
56
BitMart
LINK-BTC$11.17
0.0044850 Eth
$195,561.00
17,503.440 LINK
0.1291%
57
Hotcoin
LINK-ETH$11.15
0.0044780 Eth
$192,565.00
17,274.350 LINK
0.1274%
58
Binance
LINK-EUR$11.27
0.0045207 Eth
$169,336.00
15,051.350 LINK
0.1110%
59
BitStorage
LINK-ETH$11.16
0.0044783 Eth
$158,000.00
14,160.870 LINK
0.1045%
60
Coinbase Exchange
LINK-EUR$11.23
0.0045094 Eth
$156,538.00
13,935.110 LINK
0.1028%
61
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.20
0.0044963 Eth
$137,295.00
12,276.358 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0906%
62
BitDelta
LINK-USDT$11.16
0.0044834 Eth
$132,574.00
11,816.000 LINK
0.0872%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.18
0.0044874 Eth
$122,022.00
11,010.842 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0812%
64
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.18
0.0044878 Eth
$112,425.00
10,040.346 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0741%
65
OKX
LINK-USDC$11.15
0.0044751 Eth
$112,183.00
10,037.960 LINK
0.0741%
66
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.18
0.0044895 Eth
$111,995.00
10,014.969 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0739%
67
GMO Japan
LINK-JPY$11.16
0.0044779 Eth
$96,411.00
8,642.800 LINK
0.0638%
68
Slex
LINK-BTC$11.18
0.0044892 Eth
$94,348.00
8,418.300 LINK
0.0621%
69
Bitbank
LINK-JPY$11.22
0.0045057 Eth
$93,792.00
8,356.137 LINK
0.0617%
70
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.18
0.0044888 Eth
$67,646.00
67,895.705 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5009%
71
Slex
LINK-ETH$11.17
0.0044833 Eth
$65,050.00
5,816.730 LINK
0.0429%
72
BYDFi
LINK-USDC$11.15
0.0044778 Eth
$63,955.00
5,737.650 LINK
0.0423%
73
PointPay
LINK-BTC$11.16
0.0044817 Eth
$60,943.00
5,435.850 LINK
0.0401%
74
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.11
0.0044579 Eth
$51,190.00
51,587.110 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3806%
75
KuCoin
LINK-USDC$11.19
0.0044930 Eth
$46,286.00
4,135.448 LINK
0.0305%
76
Bitso
LINK-USD$11.17
0.0044831 Eth
$35,172.00
3,148.109 LINK
0.0232%
77
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.12
0.0044626 Eth
$32,144.00
2,885.608 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0213%
78
Binance US
LINK-USDT$11.15
0.0044745 Eth
$26,894.00
2,412.409 LINK
0.0178%
79
Bitcointry
LINK-USDT$11.17
0.0044845 Eth
$26,122.00
2,333.619 LINK
0.0172%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.18
0.0044888 Eth
$26,039.00
2,320.137 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0171%
81
EXMO
LINK-BTC$11.18
0.0044892 Eth
$25,879.00
2,314.183 LINK
0.0171%
82
Coinbase Exchange
LINK-BTC$11.14
0.0044722 Eth
$25,020.00
2,245.450 LINK
0.0166%
83
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.12
0.0044634 Eth
$21,205.00
1,902.292 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0140%
84
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.15
0.0044771 Eth
$16,695.54
16,813.333 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1240%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.18
0.0044881 Eth
$14,138.77
1,260.161 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0093%
86
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.12
0.0044634 Eth
$11,533.77
1,029.692 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0076%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.12
0.0044626 Eth
$10,075.60
10,137.639 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0748%
88
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.18
0.0044895 Eth
$9,746.55
5,679.328 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0419%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.16
0.0044801 Eth
$8,412.04
751.893 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0055%
90
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.15
0.0044775 Eth
$7,871.31
702.735 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0052%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.18
0.0044888 Eth
$7,208.49
650.718 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0048%
92
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.16
0.0044786 Eth
$6,192.51
10.024 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.14
0.0044700 Eth
$3,047.60
271.321 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0020%
94
Osmosis
IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049-UOSMO$11.24
0.0045115 Eth
$2,962.23
263.581 IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049
0.0019%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.15
0.0044732 Eth
$2,748.87
246.371 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0018%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$11.17
0.0044842 Eth
$2,429.19
216.276 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0016%
97
CoinEx
LINK-BTC$11.15
0.0044764 Eth
$2,008.75
178.845 LINK
0.0013%
98
CoinEx
LINK-USDC$11.17
0.0044822 Eth
$1,940.54
172.846 LINK
0.0013%
99
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$11.16
0.0044845 Eth
$543.14
49.145 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0004%
100
CEX.IO
LINK-USDT$11.18
0.0044886 Eth
$280.34
25.100 LINK
0.0002%

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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