ETH Price: $3,308.56 (-2.69%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

730,023 ( 0.008%)

Market

Price

$24.78 @ 0.007490 ETH (-4.94%)

Onchain Market Cap

$24,780,000,000.00

Circulating Supply Market Cap

$15,818,237,222.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
8.56675625 LINK

Value
$212.28 ( ~0.0641607779550248 Eth) [0.0000%]
0xe3d688235b936e9Aa5AB48d6F432764628eF2A60
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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 22427.27% |ETH 0.0003846 1847.48%

Market

Volume (24H):$613,905,351.00
Market Capitalization:$15,818,237,222.00
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$24.84
0.0075151 Eth
$75,976,598.00
2,998,766.780 LINK
19.8628%
2
Coinbase Exchange
LINK-USD$24.76
0.0074946 Eth
$39,235,748.00
1,584,386.520 LINK
10.4944%
3
Slex
LINK-USDT$24.76
0.0074973 Eth
$25,655,465.00
1,015,666.450 LINK
6.7274%
4
Bybit
LINK-USDT$24.76
0.0074921 Eth
$24,733,373.00
976,730.585 LINK
6.4695%
5
P2B
LINK-USDT$24.80
0.0075064 Eth
$15,435,675.00
622,296.430 LINK
4.1219%
6
HTX
LINK-USDT$24.78
0.0074966 Eth
$14,415,245.00
570,068.206 LINK
3.7759%
7
OKX
LINK-USDT$24.79
0.0075014 Eth
$13,805,459.00
545,741.268 LINK
3.6148%
8
DigiFinex
LINK-USDT$24.80
0.0075037 Eth
$9,641,675.00
388,741.580 LINK
2.5749%
9
Binance
LINK-FDUSD$24.77
0.0074974 Eth
$7,915,335.00
312,581.770 LINK
2.0704%
10
WhiteBIT
LINK-USDT$24.72
0.0074858 Eth
$7,753,927.00
313,670.000 LINK
2.0776%
11
Azbit
LINK-USDT$24.75
0.0074943 Eth
$7,516,540.00
296,775.349 LINK
1.9657%
12
XT.COM
LINK-USDT$24.76
0.0074943 Eth
$7,442,318.00
294,045.830 LINK
1.9477%
13
Coinstore
LINK-USDT$24.79
0.0075019 Eth
$6,768,894.00
267,556.670 LINK
1.7722%
14
KuCoin
LINK-USDT$24.80
0.0075044 Eth
$6,767,367.00
272,829.595 LINK
1.8071%
15
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.74
0.0074893 Eth
$6,425,129.00
255,312.274 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.6911%
16
MEXC
LINK-USDT$24.76
0.0074978 Eth
$5,899,852.00
238,286.670 LINK
1.5783%
17
Bitunix
LINK-USDT$24.77
0.0074958 Eth
$5,823,784.00
235,025.700 LINK
1.5567%
18
Kraken
LINK-USD$24.76
0.0074897 Eth
$4,995,899.00
201,751.943 LINK
1.3363%
19
CoinW
LINK-USDT$24.77
0.0074995 Eth
$4,905,208.00
198,012.020 LINK
1.3116%
20
Binance
LINK-USDC$24.79
0.0075026 Eth
$4,898,784.00
192,835.670 LINK
1.2773%
21
BTSE
LINK-USDT$24.76
0.0074938 Eth
$4,807,574.00
194,143.294 LINK
1.2859%
22
Hotcoin
LINK-USDT$24.79
0.0075061 Eth
$4,490,138.00
181,160.140 LINK
1.1999%
23
BYDFi
LINK-USDT$24.80
0.0075059 Eth
$4,190,684.00
168,968.700 LINK
1.1192%
24
LBank
LINK-USDT$24.77
0.0074973 Eth
$3,563,858.00
143,852.520 LINK
0.9528%
25
LATOKEN
LINK-USDT$24.76
0.0074970 Eth
$3,528,947.00
142,554.643 LINK
0.9442%
26
FMCPAY
LINK-USDT$24.77
0.0075000 Eth
$3,162,403.00
125,364.774 LINK
0.8304%
27
Coinbase Exchange
LINK-EUR$24.85
0.0075158 Eth
$3,057,937.00
123,061.140 LINK
0.8151%
28
QMall
LINK-USDT$24.78
0.0074981 Eth
$2,990,304.00
118,227.153 LINK
0.7831%
29
Dex-Trade
LINK-USDT$24.82
0.0075081 Eth
$2,338,662.00
94,237.540 LINK
0.6242%
30
Bitvavo
LINK-EUR$24.81
0.0075134 Eth
$2,238,747.00
90,231.619 LINK
0.5977%
31
WhiteBIT
LINK-BTC$24.75
0.0074891 Eth
$1,960,830.00
79,234.820 LINK
0.5248%
32
Coinbase Exchange
LINK-GBP$24.81
0.0075056 Eth
$1,786,258.00
72,007.040 LINK
0.4769%
33
CoinEx
LINK-USDT$24.80
0.0075034 Eth
$1,784,284.00
70,140.559 LINK
0.4646%
34
FMCPAY
LINK-ETH$24.75
0.0074904 Eth
$1,589,373.00
63,288.960 LINK
0.4192%
35
FMCPAY
LINK-BTC$24.77
0.0075022 Eth
$1,468,534.00
58,393.200 LINK
0.3868%
36
WhiteBIT
LINK-TRY$24.82
0.0075123 Eth
$1,414,344.00
56,974.440 LINK
0.3774%
37
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.83
0.0075148 Eth
$1,280,891.00
50,872.276 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3370%
38
tanX
LINK-USDC$24.79
0.0075055 Eth
$1,103,449.00
43,607.730 LINK
0.2888%
39
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.77
0.0074978 Eth
$1,025,328.00
40,742.608 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2699%
40
PointPay
LINK-USDT$24.77
0.0074987 Eth
$951,277.00
37,482.254 LINK
0.2483%
41
OKX
LINK-USDC$24.77
0.0074954 Eth
$881,319.00
34,966.389 LINK
0.2316%
42
Gemini
LINK-USD$24.79
0.0075015 Eth
$860,529.00
34,706.051 LINK
0.2299%
43
EXMO
LINK-USDT$24.80
0.0075039 Eth
$845,851.00
34,105.320 LINK
0.2259%
44
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.76
0.0074948 Eth
$832,556.00
33,065.552 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2190%
45
AscendEX (BitMax)
LINK-BTC$24.95
0.0075463 Eth
$815,880.00
32,700.800 LINK
0.2166%
46
Phemex
LINK-USDT$24.75
0.0074943 Eth
$804,114.00
32,492.060 LINK
0.2152%
47
Kraken
LINK-EUR$24.87
0.0075236 Eth
$780,036.00
31,358.569 LINK
0.2077%
48
Trubit
LINK-USDT$24.78
0.0075036 Eth
$774,008.00
30,603.220 LINK
0.2027%
49
Bitbank
LINK-JPY$24.84
0.0075140 Eth
$666,748.00
26,845.753 LINK
0.1778%
50
BigONE
LINK-USDT$24.71
0.0074782 Eth
$659,040.00
26,672.490 LINK
0.1767%
51
Binance
LINK-EUR$24.86
0.0075210 Eth
$591,237.00
23,290.360 LINK
0.1543%
52
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$24.77
0.0074958 Eth
$543,508.00
21,368.647 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1415%
53
Binance
LINK-TRY$24.94
0.0075483 Eth
$539,022.00
21,182.780 LINK
0.1403%
54
WhiteBIT
LINK-EUR$24.84
0.0075169 Eth
$513,036.00
20,655.800 LINK
0.1368%
55
Kraken
LINK-USDT$24.79
0.0074988 Eth
$398,420.00
16,070.081 LINK
0.1064%
56
QMall
LINK-USDC$24.82
0.0075130 Eth
$389,548.00
15,357.991 LINK
0.1017%
57
Kraken
LINK-XBT$24.77
0.0074923 Eth
$380,126.00
15,345.548 LINK
0.1016%
58
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.78
0.0074989 Eth
$330,220.00
13,134.487 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0870%
59
LATOKEN
LINK-BTC$24.78
0.0074979 Eth
$328,249.00
13,248.479 LINK
0.0878%
60
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.75
0.0074893 Eth
$310,921.00
321,040.717 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.1265%
61
BitMart
LINK-BTC$24.78
0.0074984 Eth
$298,647.00
12,049.720 LINK
0.0798%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.74
0.0074871 Eth
$291,109.00
11,579.166 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0767%
63
Coinbase Exchange
LINK-BTC$24.78
0.0075023 Eth
$287,335.00
11,594.940 LINK
0.0768%
64
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.76
0.0074933 Eth
$261,841.00
270,059.125 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7888%
65
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.76
0.0074938 Eth
$256,466.00
21,049.106 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1394%
66
Bitci TR
LINK-TRY$24.76
0.0074997 Eth
$253,395.00
9,985.500 LINK
0.0661%
67
BitDelta
LINK-USDT$24.77
0.0074974 Eth
$250,505.00
9,884.000 LINK
0.0655%
68
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.81
0.0075076 Eth
$232,374.00
9,111.359 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0604%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$24.74
0.0074873 Eth
$197,107.00
7,728.959 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0512%
70
GMO Japan
LINK-JPY$24.84
0.0075139 Eth
$176,622.00
7,111.600 LINK
0.0471%
71
Slex
LINK-ETH$24.77
0.0074977 Eth
$172,639.00
6,859.390 LINK
0.0454%
72
BitStorage
LINK-ETH$24.81
0.0075076 Eth
$170,120.00
6,857.260 LINK
0.0454%
73
Hotcoin
LINK-BTC$24.78
0.0075029 Eth
$164,882.00
6,652.970 LINK
0.0441%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.79
0.0075018 Eth
$159,181.00
6,330.536 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0419%
75
Coinbase Exchange
LINK-ETH$24.76
0.0074925 Eth
$154,058.00
6,221.190 LINK
0.0412%
76
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$24.94
0.0075487 Eth
$136,859.00
6,589.295 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0436%
77
BYDFi
LINK-USDC$24.77
0.0074953 Eth
$129,539.00
5,229.080 LINK
0.0346%
78
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.80
0.0075073 Eth
$120,119.00
4,705.019 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0312%
79
PointPay
LINK-BTC$24.78
0.0074968 Eth
$118,955.00
4,716.430 LINK
0.0312%
80
Kraken
LINK-GBP$24.78
0.0074951 Eth
$117,145.00
4,727.326 LINK
0.0313%
81
BitMart
LINK-ETH$24.80
0.0075032 Eth
$104,688.00
4,221.180 LINK
0.0280%
82
Mercado Bitcoin
LINK-BRL$24.93
0.0075429 Eth
$100,829.00
4,045.268 LINK
0.0268%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.75
0.0074889 Eth
$97,551.00
100,554.197 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6660%
84
Binance US
LINK-USDT$24.75
0.0074940 Eth
$93,434.00
3,775.806 LINK
0.0250%
85
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984$24.82
0.0075461 Eth
$78,863.00
959.947 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0064%
86
Kraken
LINK-USDC$24.80
0.0075041 Eth
$71,877.00
2,898.029 LINK
0.0192%
87
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.80
0.0075046 Eth
$65,722.00
2,595.495 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0172%
88
Bitso
LINK-USD$24.81
0.0075096 Eth
$63,403.00
2,556.026 LINK
0.0169%
89
KuCoin
LINK-USDC$24.78
0.0074956 Eth
$52,393.00
2,114.713 LINK
0.0140%
90
Hotcoin
LINK-ETH$24.76
0.0074964 Eth
$51,279.00
2,070.900 LINK
0.0137%
91
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$24.86
0.0075254 Eth
$47,017.00
1,865.048 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0124%
92
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.92
0.0075423 Eth
$39,925.00
1,583.184 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0105%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$24.90
0.0075300 Eth
$24,747.00
963.491 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0064%
94
Dex-Trade
LINK-ETH$24.80
0.0075036 Eth
$23,760.00
958.250 LINK
0.0063%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$24.75
0.0074909 Eth
$19,534.71
766.594 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0051%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$24.94
0.0075475 Eth
$18,973.33
748.428 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0050%
97
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$24.79
0.0075018 Eth
$17,220.88
23.277 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.75
0.0074922 Eth
$16,646.38
662.896 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0044%
99
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$24.92
0.0075429 Eth
$15,135.73
611.695 0X5947BB275C521040051D82396192181B413227A3
0.0041%
100
KuCoin
LINK-KCS$24.81
0.0075064 Eth
$13,984.68
563.649 LINK
0.0037%

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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