ETH Price: $3,290.84 (-2.67%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,919 ( -0.007%)

Market

Price

$25.01 @ 0.007600 ETH (-3.75%)

Onchain Market Cap

$25,010,000,000.00

Circulating Supply Market Cap

$15,954,707,723.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x4bfcd2887e7ad7cee0e48fad155fda218271d114
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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 22636.36% |ETH 0.0003846 1876.08%

Market

Volume (24H):$749,967,511.00
Market Capitalization:$15,954,707,723.00
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$24.98
0.0075923 Eth
$92,098,660.00
3,579,608.320 LINK
19.3150%
2
Coinbase Exchange
LINK-USD$24.99
0.0075918 Eth
$45,972,694.00
1,840,011.760 LINK
9.9284%
3
Bybit
LINK-USDT$24.97
0.0075894 Eth
$32,503,739.00
1,262,183.203 LINK
6.8106%
4
Slex
LINK-USDT$25.02
0.0075957 Eth
$25,890,953.00
1,010,719.420 LINK
5.4537%
5
WhiteBIT
LINK-USDT$24.94
0.0075761 Eth
$19,120,394.00
766,525.550 LINK
4.1361%
6
P2B
LINK-USDT$25.01
0.0075937 Eth
$18,696,232.00
747,584.160 LINK
4.0339%
7
HTX
LINK-USDT$24.98
0.0075926 Eth
$16,464,201.00
640,957.612 LINK
3.4585%
8
OKX
LINK-USDT$24.99
0.0075960 Eth
$16,073,433.00
624,860.148 LINK
3.3717%
9
Gate.io
LINK-USDT$24.95
0.0075814 Eth
$12,870,682.00
497,452.020 LINK
2.6842%
10
DigiFinex
LINK-USDT$25.00
0.0075973 Eth
$11,645,742.00
465,885.100 LINK
2.5138%
11
XT.COM
LINK-USDT$25.02
0.0075957 Eth
$9,150,377.00
355,648.570 LINK
1.9190%
12
Binance
LINK-FDUSD$24.96
0.0075860 Eth
$9,138,645.00
354,989.390 LINK
1.9155%
13
Azbit
LINK-USDT$25.02
0.0075957 Eth
$9,100,057.00
353,711.043 LINK
1.9086%
14
MEXC
LINK-USDT$25.01
0.0075935 Eth
$9,096,071.00
363,735.010 LINK
1.9627%
15
Coinstore
LINK-USDT$24.97
0.0075815 Eth
$8,187,908.00
318,636.390 LINK
1.7193%
16
KuCoin
LINK-USDT$24.98
0.0075925 Eth
$7,551,668.00
302,286.197 LINK
1.6311%
17
Bitunix
LINK-USDT$25.01
0.0075942 Eth
$7,149,634.00
285,913.920 LINK
1.5427%
18
Binance
LINK-USDC$25.00
0.0075958 Eth
$6,483,522.00
251,489.440 LINK
1.3570%
19
CoinW
LINK-USDT$24.95
0.0075813 Eth
$5,745,945.00
230,294.370 LINK
1.2426%
20
Kraken
LINK-USD$24.98
0.0075911 Eth
$5,688,393.00
227,727.570 LINK
1.2288%
21
BTSE
LINK-USDT$25.03
0.0076017 Eth
$5,636,904.00
225,226.131 LINK
1.2153%
22
Hotcoin
LINK-USDT$25.02
0.0075978 Eth
$5,331,812.00
213,113.260 LINK
1.1499%
23
Sushiswap
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.95
0.0075835 Eth
$5,160,533.00
51,512.955 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.2780%
24
BYDFi
LINK-USDT$25.04
0.0076090 Eth
$5,073,824.00
202,655.100 LINK
1.0935%
25
LATOKEN
LINK-USDT$24.97
0.0075894 Eth
$4,360,066.00
174,628.155 LINK
0.9423%
26
LBank
LINK-USDT$25.01
0.0075934 Eth
$4,327,043.00
173,021.810 LINK
0.9336%
27
QMall
LINK-USDT$25.02
0.0076110 Eth
$3,738,004.00
145,253.968 LINK
0.7838%
28
Bitvavo
LINK-EUR$25.00
0.0075961 Eth
$3,321,440.00
132,860.932 LINK
0.7169%
29
FMCPAY
LINK-USDT$24.99
0.0075930 Eth
$3,213,885.00
125,584.432 LINK
0.6776%
30
Coinbase Exchange
LINK-EUR$25.04
0.0076031 Eth
$3,153,029.00
125,918.020 LINK
0.6794%
31
Dex-Trade
LINK-USDT$25.02
0.0075991 Eth
$2,759,052.00
110,280.730 LINK
0.5951%
32
CoinEx
LINK-USDT$24.97
0.0075869 Eth
$2,493,604.00
96,575.062 LINK
0.5211%
33
WhiteBIT
LINK-BTC$24.98
0.0075949 Eth
$2,328,273.00
93,188.130 LINK
0.5028%
34
Coinbase Exchange
LINK-GBP$24.96
0.0075848 Eth
$2,076,941.00
83,222.370 LINK
0.4491%
35
WhiteBIT
LINK-TRY$25.05
0.0076087 Eth
$1,730,712.00
69,086.420 LINK
0.3728%
36
FMCPAY
LINK-ETH$24.96
0.0075842 Eth
$1,660,374.00
66,015.680 LINK
0.3562%
37
FMCPAY
LINK-BTC$25.01
0.0075931 Eth
$1,492,063.00
58,718.200 LINK
0.3168%
38
PointPay
LINK-USDT$25.02
0.0075965 Eth
$1,414,524.00
54,868.944 LINK
0.2961%
39
Kraken
LINK-EUR$25.01
0.0076015 Eth
$1,343,613.00
53,715.864 LINK
0.2898%
40
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.94
0.0075733 Eth
$1,239,760.00
49,242.882 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2657%
41
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.97
0.0075877 Eth
$1,017,254.00
40,512.918 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2186%
42
OKX
LINK-USDC$24.97
0.0075882 Eth
$1,012,062.00
39,564.169 LINK
0.2135%
43
EXMO
LINK-USDT$25.01
0.0075946 Eth
$980,158.00
39,196.611 LINK
0.2115%
44
Phemex
LINK-USDT$24.99
0.0075936 Eth
$961,051.00
38,461.710 LINK
0.2075%
45
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.00
0.0075926 Eth
$934,819.00
37,107.986 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2002%
46
Gemini
LINK-USD$25.04
0.0076101 Eth
$905,950.00
36,181.242 LINK
0.1952%
47
BigONE
LINK-USDT$25.08
0.0076251 Eth
$777,785.00
31,008.220 LINK
0.1673%
48
EarnBIT
LINK-USDT$24.99
0.0075972 Eth
$768,221.00
29,864.929 LINK
0.1611%
49
Trubit
LINK-USDT$25.01
0.0075943 Eth
$763,172.00
29,868.910 LINK
0.1612%
50
Bitbank
LINK-JPY$25.13
0.0076317 Eth
$758,244.00
30,174.865 LINK
0.1628%
51
Bybit
LINK-USDC$24.99
0.0075936 Eth
$704,861.00
27,410.571 LINK
0.1479%
52
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$24.94
0.0075733 Eth
$655,934.00
25,535.276 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1378%
53
Binance
LINK-TRY$25.12
0.0076339 Eth
$639,242.00
24,791.070 LINK
0.1338%
54
Binance
LINK-EUR$25.07
0.0076149 Eth
$631,498.00
24,417.210 LINK
0.1318%
55
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$25.01
0.0075949 Eth
$582,381.00
22,755.375 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1228%
56
Bitkub
LINK-THB$25.19
0.0076502 Eth
$563,594.00
22,377.918 LINK
0.1207%
57
WhiteBIT
LINK-EUR$25.10
0.0076226 Eth
$550,277.00
21,925.980 LINK
0.1183%
58
Coinbase Exchange
LINK-USDT$25.02
0.0076033 Eth
$534,148.00
21,351.565 LINK
0.1152%
59
QMall
LINK-USDC$25.04
0.0076058 Eth
$522,328.00
20,262.301 LINK
0.1093%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.11
0.0076311 Eth
$451,418.00
17,860.631 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0964%
61
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.07
0.0076122 Eth
$435,218.00
446,648.283 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.4100%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.01
0.0076018 Eth
$422,800.00
16,748.193 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0904%
63
LATOKEN
LINK-BTC$24.95
0.0075835 Eth
$419,827.00
16,824.076 LINK
0.0908%
64
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$25.01
0.0076002 Eth
$381,824.00
30,862.562 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1665%
65
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.07
0.0076120 Eth
$338,138.00
348,007.246 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.8778%
66
itBit
LINK-USD$25.03
0.0075996 Eth
$318,542.00
12,726.419 LINK
0.0687%
67
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.97
0.0075830 Eth
$305,913.00
11,851.144 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0639%
68
BitMart
LINK-BTC$24.97
0.0075834 Eth
$290,211.00
11,623.200 LINK
0.0627%
69
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.94
0.0075792 Eth
$287,116.00
11,274.024 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0608%
70
BitDelta
LINK-USDT$24.98
0.0075906 Eth
$271,782.00
10,576.000 LINK
0.0571%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$25.07
0.0076196 Eth
$260,653.00
10,100.643 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0545%
72
Slex
LINK-ETH$24.96
0.0075852 Eth
$251,923.00
9,984.090 LINK
0.0539%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.00
0.0075921 Eth
$229,752.00
9,094.596 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0491%
74
Coinbase Exchange
LINK-BTC$24.99
0.0075889 Eth
$211,610.00
8,466.250 LINK
0.0457%
75
Hotcoin
LINK-BTC$25.02
0.0075966 Eth
$200,045.00
7,996.090 LINK
0.0431%
76
bitcastle
LINK-USDT$25.00
0.0075930 Eth
$197,923.00
7,699.120 LINK
0.0415%
77
BitStorage
LINK-ETH$24.96
0.0075848 Eth
$173,690.00
6,959.830 LINK
0.0376%
78
Binance US
LINK-USDT$25.00
0.0075943 Eth
$165,537.00
6,620.399 LINK
0.0357%
79
BYDFi
LINK-USDC$25.00
0.0076040 Eth
$156,006.00
6,239.460 LINK
0.0337%
80
PointPay
LINK-BTC$24.94
0.0075809 Eth
$152,203.00
5,952.088 LINK
0.0321%
81
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$24.94
0.0075742 Eth
$140,218.00
6,716.534 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0362%
82
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.90
0.0075670 Eth
$133,765.00
5,190.437 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0280%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.94
0.0075733 Eth
$122,784.00
126,767.966 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6840%
84
Mercado Bitcoin
LINK-BRL$25.04
0.0076101 Eth
$112,218.00
4,481.596 LINK
0.0242%
85
BitMart
LINK-ETH$24.96
0.0075824 Eth
$105,051.00
4,207.960 LINK
0.0227%
86
Bitso
LINK-USD$24.99
0.0075936 Eth
$97,668.00
3,908.125 LINK
0.0211%
87
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984$25.12
0.0076268 Eth
$79,815.00
959.947 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0052%
88
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.92
0.0075689 Eth
$72,394.00
2,851.062 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0154%
89
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$25.02
0.0076035 Eth
$65,512.00
2,591.049 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0140%
90
Hotcoin
LINK-ETH$24.96
0.0075885 Eth
$63,547.00
2,545.850 LINK
0.0137%
91
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.06
0.0076086 Eth
$55,657.00
2,203.528 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0119%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$24.97
0.0075811 Eth
$52,706.00
2,002.106 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0108%
93
Gemini
LINK-BTC$25.12
0.0076335 Eth
$25,976.00
1,034.233 LINK
0.0056%
94
Bitstamp
LINK-BTC$25.08
0.0076237 Eth
$25,444.00
1,014.339 LINK
0.0055%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$25.07
0.0076120 Eth
$25,281.00
976.199 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0053%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.07
0.0076196 Eth
$24,884.00
986.203 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0053%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$25.10
0.0076285 Eth
$23,928.00
937.297 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0051%
98
Dex-Trade
LINK-ETH$25.04
0.0076019 Eth
$22,157.00
885.000 LINK
0.0048%
99
HTX
LINK-BTC$25.09
0.0076244 Eth
$16,906.71
658.957 LINK
0.0036%
100
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$25.04
0.0076022 Eth
$16,273.46
48.385 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0003%

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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