ETH Price: $2,624.98 (+1.69%)
Gas: 7.82 Gwei

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,280 (0.00%)

Market

Price

$11.77 @ 0.004484 ETH (+4.94%)

Onchain Market Cap

$11,770,000,000.00

Circulating Supply Market Cap

$7,377,718,636.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x9e35c1c5b46bb4a6c286062cacc70a842cde9c92
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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 10600% |ETH 0.0003846 1065.89%

Market

Volume (24H):$414,642,809.00
Market Capitalization:$7,377,718,636.00
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$11.77
0.0044903 Eth
$28,226,662.00
2,445,213.690 LINK
14.0989%
2
WhiteBIT
LINK-USDT$11.72
0.0044858 Eth
$20,703,861.00
1,766,230.560 LINK
10.1840%
3
Coinbase Exchange
LINK-USD$11.77
0.0044870 Eth
$17,329,250.00
1,472,949.420 LINK
8.4929%
4
HTX
LINK-USDT$11.75
0.0044843 Eth
$16,258,408.00
1,407,654.373 LINK
8.1164%
5
Bybit
LINK-USDT$11.79
0.0045004 Eth
$10,888,619.00
941,804.533 LINK
5.4304%
6
Bitget
LINK-USDT$11.76
0.0044859 Eth
$9,517,458.00
824,197.841 LINK
4.7523%
7
Gate.io
LINK-USDT$11.76
0.0044883 Eth
$7,058,555.00
609,817.210 LINK
3.5162%
8
Upbit
LINK-KRW$11.81
0.0045081 Eth
$6,095,622.00
516,001.005 LINK
2.9752%
9
OKX
LINK-USDT$11.75
0.0044847 Eth
$5,585,919.00
483,764.619 LINK
2.7894%
10
Azbit
LINK-USDT$11.75
0.0044840 Eth
$4,984,988.00
431,721.630 LINK
2.4893%
11
Slex
LINK-USDT$11.76
0.0044839 Eth
$4,938,169.00
427,579.470 LINK
2.4654%
12
BTSE
LINK-USDT$11.77
0.0044934 Eth
$4,734,484.00
402,082.861 LINK
2.3184%
13
BVOX
LINK-USDT$11.78
0.0044889 Eth
$4,427,420.00
383,453.250 LINK
2.2110%
14
Biconomy.com
LINK-USDT$11.78
0.0044938 Eth
$3,573,648.00
309,243.130 LINK
1.7831%
15
CoinW
LINK-USDT$11.76
0.0044873 Eth
$2,931,073.00
249,266.920 LINK
1.4373%
16
Bitunix
LINK-USDT$11.77
0.0044836 Eth
$2,914,213.00
247,778.610 LINK
1.4287%
17
XT.COM
LINK-USDT$11.77
0.0044874 Eth
$2,837,652.00
245,698.480 LINK
1.4167%
18
Hotcoin
LINK-USDT$11.78
0.0044910 Eth
$2,486,549.00
211,002.340 LINK
1.2166%
19
KuCoin
LINK-USDT$11.76
0.0044872 Eth
$2,472,279.00
210,198.780 LINK
1.2120%
20
Trubit
LINK-USDT$11.72
0.0044912 Eth
$2,385,568.00
206,694.290 LINK
1.1918%
21
Kraken
LINK-USD$11.76
0.0044895 Eth
$2,278,501.00
193,673.369 LINK
1.1167%
22
Coinstore
LINK-USDT$11.77
0.0044912 Eth
$2,017,680.00
174,574.170 LINK
1.0066%
23
LBank
LINK-USDT$11.76
0.0044841 Eth
$1,996,172.00
169,793.900 LINK
0.9790%
24
Bitvavo
LINK-EUR$11.73
0.0044720 Eth
$1,896,815.00
161,763.455 LINK
0.9327%
25
ProBit Global
LINK-USDT$11.78
0.0044926 Eth
$1,891,314.00
160,556.648 LINK
0.9258%
26
AscendEX (BitMax)
LINK-USDT$11.75
0.0044827 Eth
$1,764,571.00
150,217.100 LINK
0.8661%
27
Binance
LINK-BTC$11.78
0.0044910 Eth
$1,731,598.00
148,768.430 LINK
0.8578%
28
Bithumb
LINK-KRW$11.83
0.0045158 Eth
$1,470,969.00
124,290.903 LINK
0.7167%
29
BYDFi
LINK-USDT$11.75
0.0044845 Eth
$1,379,056.00
117,339.240 LINK
0.6766%
30
WhiteBIT
LINK-BTC$11.78
0.0044937 Eth
$1,207,087.00
102,507.560 LINK
0.5911%
31
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.74
0.0044760 Eth
$1,094,317.00
94,973.141 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.5476%
32
HashKey Global
LINK-USDT$11.77
0.0044875 Eth
$1,076,661.00
93,654.578 LINK
0.5400%
33
BigONE
LINK-USDT$11.79
0.0044953 Eth
$1,006,655.00
85,383.080 LINK
0.4923%
34
Dex-Trade
LINK-USDT$11.77
0.0044881 Eth
$950,698.00
80,794.730 LINK
0.4659%
35
Azbit
LINK-ETH$11.77
0.0044893 Eth
$921,405.00
79,944.250 LINK
0.4610%
36
CoinEx
LINK-USDT$11.78
0.0044886 Eth
$844,932.00
73,078.339 LINK
0.4214%
37
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.68
0.0044548 Eth
$648,554.00
56,295.511 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3246%
38
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.73
0.0044754 Eth
$601,539.00
52,281.225 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3015%
39
LATOKEN
LINK-USDT$11.71
0.0044856 Eth
$536,245.00
45,809.153 LINK
0.2641%
40
tanX
LINK-USDC$11.75
0.0044870 Eth
$483,042.00
41,813.220 LINK
0.2411%
41
PointPay
LINK-USDT$11.73
0.0044957 Eth
$429,262.00
37,109.858 LINK
0.2140%
42
Gemini
LINK-USD$11.77
0.0044874 Eth
$412,581.00
35,068.436 LINK
0.2022%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.73
0.0044748 Eth
$366,038.00
31,644.522 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1825%
44
KickEX
LINK-USDT$11.80
0.0044952 Eth
$359,543.00
30,481.508 LINK
0.1758%
45
ProBit Global
LINK-BTC$11.78
0.0044918 Eth
$353,583.00
30,021.428 LINK
0.1731%
46
LATOKEN
LINK-BTC$11.76
0.0044901 Eth
$345,034.00
29,329.692 LINK
0.1691%
47
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.74
0.0044808 Eth
$340,408.00
29,662.795 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1710%
48
EXMO
LINK-USDT$11.69
0.0044598 Eth
$337,074.00
28,842.415 LINK
0.1663%
49
Phemex
LINK-USDT$11.78
0.0044916 Eth
$331,197.00
28,122.040 LINK
0.1621%
50
Bybit
LINK-USDC$11.77
0.0044911 Eth
$328,714.00
28,467.323 LINK
0.1641%
51
BYDFi
LINK-USDC$11.74
0.0044944 Eth
$281,865.00
24,018.000 LINK
0.1385%
52
Coinbase Exchange
LINK-USDT$11.68
0.0044535 Eth
$274,398.00
23,498.682 LINK
0.1355%
53
EarnBIT
LINK-USDT$11.77
0.0044873 Eth
$266,764.00
23,098.742 LINK
0.1332%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.79
0.0044970 Eth
$251,611.00
21,804.578 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1257%
55
WhiteBIT
LINK-EUR$11.79
0.0044983 Eth
$227,389.00
19,290.610 LINK
0.1112%
56
Binance
LINK-EUR$11.77
0.0044862 Eth
$220,623.00
19,074.230 LINK
0.1100%
57
BitMart
LINK-BTC$11.77
0.0044911 Eth
$203,286.00
17,271.600 LINK
0.0996%
58
Binance
LINK-ETH$11.76
0.0044849 Eth
$175,047.00
15,195.020 LINK
0.0876%
59
Bitbank
LINK-JPY$11.75
0.0044834 Eth
$171,112.00
14,564.595 LINK
0.0840%
60
BitDelta
LINK-USDT$11.77
0.0044877 Eth
$154,342.00
13,393.000 LINK
0.0772%
61
WhiteBIT
LINK-TRY$11.78
0.0044967 Eth
$147,990.00
12,560.070 LINK
0.0724%
62
OKX
LINK-USDC$11.75
0.0044852 Eth
$144,027.00
12,469.089 LINK
0.0719%
63
GMO Japan
LINK-JPY$11.69
0.0044582 Eth
$139,727.00
11,957.800 LINK
0.0689%
64
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.73
0.0044759 Eth
$125,236.00
10,860.256 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0626%
65
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.77
0.0044906 Eth
$110,166.00
108,346.952 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6247%
66
Slex
LINK-BTC$11.77
0.0044922 Eth
$101,415.00
8,721.200 LINK
0.0503%
67
Bitkub
LINK-THB$11.74
0.0044799 Eth
$87,373.00
7,443.352 LINK
0.0429%
68
KuCoin
LINK-USDC$11.78
0.0044954 Eth
$78,910.00
6,696.880 LINK
0.0386%
69
Bitso
LINK-USD$11.79
0.0044993 Eth
$73,759.00
6,255.252 LINK
0.0361%
70
Binance US
LINK-USDT$11.71
0.0044815 Eth
$71,480.00
6,105.992 LINK
0.0352%
71
Slex
LINK-ETH$11.75
0.0044825 Eth
$69,774.00
6,060.560 LINK
0.0349%
72
Binance
LINK-BNB$11.77
0.0044870 Eth
$66,310.00
5,797.875 LINK
0.0334%
73
PointPay
LINK-BTC$11.78
0.0044906 Eth
$64,637.00
5,550.977 LINK
0.0320%
74
Binance
LINK-TRY$11.79
0.0044969 Eth
$63,743.00
5,494.120 LINK
0.0317%
75
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.69
0.0044532 Eth
$59,831.00
59,013.039 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3403%
76
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.74
0.0044779 Eth
$59,641.00
5,175.657 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0298%
77
Kraken
LINK-GBP$11.72
0.0044712 Eth
$59,447.00
5,073.747 LINK
0.0293%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.77
0.0044906 Eth
$39,167.00
3,388.616 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0195%
79
Binance
LINK-BRL$11.65
0.0044380 Eth
$38,245.00
3,338.520 LINK
0.0192%
80
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.76
0.0044866 Eth
$37,833.00
3,305.466 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0191%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.74
0.0044799 Eth
$37,826.00
3,281.204 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0189%
82
Mercado Bitcoin
LINK-BRL$11.60
0.0044273 Eth
$37,244.00
3,210.249 LINK
0.0185%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.77
0.0044903 Eth
$33,528.00
2,892.822 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0167%
84
EXMO
LINK-BTC$11.77
0.0044920 Eth
$30,668.00
2,605.333 LINK
0.0150%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.77
0.0044920 Eth
$30,288.00
2,625.951 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0151%
86
Bitcointry
LINK-USDT$11.75
0.0044843 Eth
$28,508.00
2,471.928 LINK
0.0143%
87
HTX
LINK-BTC$11.81
0.0045056 Eth
$27,786.00
2,407.033 LINK
0.0139%
88
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.72
0.0044717 Eth
$25,666.00
25,291.303 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1458%
89
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.76
0.0044833 Eth
$24,680.00
2,131.390 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0123%
90
Coinone
LINK-KRW$11.73
0.0044727 Eth
$22,778.00
1,942.481 LINK
0.0112%
91
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.73
0.0044744 Eth
$22,332.00
1,930.447 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0111%
92
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.74
0.0044814 Eth
$22,156.00
21,851.288 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1260%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.75
0.0044745 Eth
$19,222.35
1,668.028 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0096%
94
Nonkyc.io
LINK-BTC$11.72
0.0044708 Eth
$17,913.88
1,539.688 LINK
0.0089%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD93F7E271CB87C23AAA73EDC008A79646D1F9912$11.74
0.0044785 Eth
$14,747.04
1,276.681 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0074%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.71
0.0044670 Eth
$9,451.52
817.993 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0047%
97
Uniswap V2 (Ethereum)
0XDFC5964141C018485B4D017634660F85AA667714-0X514910771AF9CA656AF840DFF83E8264ECF986CA$11.75
0.0044735 Eth
$9,425.69
470,424.524 0XDFC5964141C018485B4D017634660F85AA667714
2.7124%
98
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.73
0.0044765 Eth
$8,309.70
12.470 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.77
0.0044906 Eth
$8,127.71
695.031 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0040%
100
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.70
0.0044652 Eth
$7,903.42
722.321 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0042%

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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