ETH Price: $2,317.65 (-5.27%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,223 ( 0.007%)

Market

Price

$10.47 @ 0.004518 ETH (-3.47%)

Onchain Market Cap

$10,470,000,000.00

Circulating Supply Market Cap

$6,552,806,097.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
26.55180338 LINK

Value
$278.00 ( ~0.119949267295516 Eth) [0.0000%]
0x6f050c52eF93e7BE5594aC7018FfCBBCd69C97eB
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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 9418.18% |ETH 0.0003846 1074.73%

Market

Volume (24H):$531,054,482.00
Market Capitalization:$6,552,806,097.00
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
LBank
LINK-USDT$10.46
0.0045042 Eth
$37,962,342.00
3,629,112.060 LINK
15.0323%
2
Binance
LINK-USDT$10.41
0.0044872 Eth
$35,872,517.00
3,390,167.390 LINK
14.0425%
3
WhiteBIT
LINK-USDT$10.41
0.0044940 Eth
$28,243,531.00
2,713,176.340 LINK
11.2383%
4
Bybit
LINK-USDT$10.40
0.0044879 Eth
$21,805,707.00
2,061,654.383 LINK
8.5396%
5
Coinbase Exchange
LINK-USD$10.42
0.0044971 Eth
$18,034,711.00
1,730,778.410 LINK
7.1691%
6
HTX
LINK-USDT$10.40
0.0044801 Eth
$13,148,335.00
1,239,858.405 LINK
5.1357%
7
Bitget
LINK-USDT$10.42
0.0044968 Eth
$9,706,938.00
914,782.788 LINK
3.7891%
8
P2B
LINK-USDT$10.46
0.0045042 Eth
$6,624,567.00
633,293.270 LINK
2.6232%
9
OKX
LINK-USDT$10.42
0.0044909 Eth
$6,189,970.00
583,991.246 LINK
2.4190%
10
Slex
LINK-USDT$10.43
0.0045049 Eth
$6,110,321.00
575,231.670 LINK
2.3827%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.42
0.0044839 Eth
$5,399,709.00
520,154.407 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.1545%
12
Azbit
LINK-USDT$10.41
0.0044962 Eth
$4,887,698.00
460,298.790 LINK
1.9066%
13
DigiFinex
LINK-USDT$10.40
0.0044902 Eth
$4,592,182.00
441,523.230 LINK
1.8288%
14
Biconomy.com
LINK-USDT$10.44
0.0044924 Eth
$4,251,905.00
400,308.560 LINK
1.6581%
15
KuCoin
LINK-USDT$10.41
0.0044944 Eth
$4,153,610.00
398,861.930 LINK
1.6521%
16
XT.COM
LINK-USDT$10.40
0.0044829 Eth
$3,349,432.00
316,516.650 LINK
1.3111%
17
CoinW
LINK-USDT$10.45
0.0045051 Eth
$2,782,941.00
266,197.000 LINK
1.1026%
18
Kraken
LINK-USD$10.45
0.0045043 Eth
$2,568,690.00
245,747.463 LINK
1.0179%
19
ProBit Global
LINK-USDT$10.44
0.0044978 Eth
$2,559,600.00
245,055.405 LINK
1.0151%
20
Coinstore
LINK-USDT$10.41
0.0044991 Eth
$2,140,612.00
201,814.310 LINK
0.8359%
21
Trubit
LINK-USDT$10.46
0.0045029 Eth
$2,073,685.00
195,606.530 LINK
0.8102%
22
Bitunix
LINK-USDT$10.42
0.0044842 Eth
$1,721,604.00
165,249.870 LINK
0.6845%
23
BYDFi
LINK-USDT$10.43
0.0044905 Eth
$1,701,726.00
163,160.880 LINK
0.6758%
24
AscendEX (BitMax)
LINK-USDT$10.45
0.0045080 Eth
$1,676,997.00
160,551.300 LINK
0.6650%
25
FameEX
LINK-USDT$10.41
0.0044840 Eth
$1,432,232.00
135,238.917 LINK
0.5602%
26
Bitexen
LINK-TRY$10.50
0.0045176 Eth
$1,281,769.00
122,053.270 LINK
0.5056%
27
WhiteBIT
LINK-BTC$10.43
0.0045032 Eth
$1,274,790.00
122,212.250 LINK
0.5062%
28
Dex-Trade
LINK-USDT$10.42
0.0044856 Eth
$1,181,313.00
113,376.320 LINK
0.4696%
29
Bitvavo
LINK-EUR$10.42
0.0044924 Eth
$987,400.00
94,732.069 LINK
0.3924%
30
BTSE
LINK-USDT$10.44
0.0044924 Eth
$931,592.00
89,196.473 LINK
0.3695%
31
Azbit
LINK-ETH$10.43
0.0045016 Eth
$877,852.00
84,551.513 LINK
0.3502%
32
Bitexen
LINK-USDT$10.46
0.0044987 Eth
$843,910.00
80,697.200 LINK
0.3343%
33
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.46
0.0045124 Eth
$824,527.00
78,729.006 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3261%
34
FMCPAY
LINK-USDT$10.45
0.0045004 Eth
$792,014.00
74,503.302 LINK
0.3086%
35
WhiteBIT
LINK-EUR$10.40
0.0044896 Eth
$712,328.00
68,495.860 LINK
0.2837%
36
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.42
0.0044863 Eth
$662,483.00
64,112.603 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2656%
37
BigONE
LINK-USDT$10.44
0.0044897 Eth
$543,137.00
52,040.110 LINK
0.2156%
38
tanX
LINK-USDC$10.45
0.0044986 Eth
$535,230.00
50,448.430 LINK
0.2090%
39
PointPay
LINK-USDT$10.44
0.0044939 Eth
$522,318.00
49,447.018 LINK
0.2048%
40
LATOKEN
LINK-USDT$10.42
0.0044955 Eth
$505,161.00
48,497.860 LINK
0.2009%
41
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.41
0.0044826 Eth
$504,168.00
48,593.850 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2013%
42
EXMO
LINK-USDT$10.44
0.0044934 Eth
$501,524.00
48,054.573 LINK
0.1990%
43
FMCPAY
LINK-BTC$10.43
0.0045016 Eth
$443,033.00
42,267.400 LINK
0.1751%
44
Bybit
LINK-USDC$10.41
0.0044917 Eth
$421,444.00
39,701.341 LINK
0.1644%
45
ProBit Global
LINK-BTC$10.46
0.0045034 Eth
$418,485.00
40,016.377 LINK
0.1658%
46
Phemex
LINK-USDT$10.41
0.0044816 Eth
$397,660.00
38,198.860 LINK
0.1582%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.47
0.0045196 Eth
$378,188.00
36,437.796 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1509%
48
FMCPAY
LINK-ETH$10.41
0.0044936 Eth
$372,628.00
35,986.560 LINK
0.1491%
49
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.40
0.0044792 Eth
$340,629.00
33,015.443 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1368%
50
EarnBIT
LINK-USDT$10.40
0.0044915 Eth
$282,084.00
26,681.952 LINK
0.1105%
51
Coinbase Exchange
LINK-EUR$10.47
0.0045178 Eth
$260,205.00
24,857.250 LINK
0.1030%
52
CoinEx
LINK-USDT$10.46
0.0044982 Eth
$196,138.00
18,509.277 LINK
0.0767%
53
LATOKEN
LINK-BTC$10.43
0.0045024 Eth
$185,923.00
17,821.977 LINK
0.0738%
54
BitDelta
LINK-USDT$10.41
0.0044962 Eth
$175,008.00
16,527.000 LINK
0.0685%
55
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.42
0.0044839 Eth
$172,505.00
16,331.677 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0676%
56
BitMart
LINK-BTC$10.46
0.0045042 Eth
$167,435.00
16,006.460 LINK
0.0663%
57
BYDFi
LINK-USDC$10.46
0.0045042 Eth
$151,762.00
14,507.010 LINK
0.0601%
58
Coinbase Exchange
LINK-GBP$10.46
0.0045080 Eth
$148,437.00
14,189.290 LINK
0.0588%
59
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.43
0.0045009 Eth
$145,170.00
13,788.594 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0571%
60
Bitbank
LINK-JPY$10.45
0.0045082 Eth
$142,392.00
13,631.743 LINK
0.0565%
61
Nonkyc.io
LINK-USDT$10.43
0.0044903 Eth
$130,257.00
12,318.677 LINK
0.0510%
62
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.47
0.0045196 Eth
$125,930.00
126,969.392 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5259%
63
OKX
LINK-USDC$10.44
0.0045071 Eth
$124,324.00
11,729.166 LINK
0.0486%
64
Gemini
LINK-USD$10.41
0.0044957 Eth
$102,421.00
9,835.244 LINK
0.0407%
65
WhiteBIT
LINK-TRY$10.46
0.0045163 Eth
$99,419.00
9,503.470 LINK
0.0394%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.41
0.0044912 Eth
$92,596.00
8,773.494 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0363%
67
Slex
LINK-BTC$10.47
0.0045073 Eth
$87,664.00
8,355.100 LINK
0.0346%
68
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.43
0.0044840 Eth
$86,307.00
87,341.657 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3618%
69
GMO Japan
LINK-JPY$10.43
0.0044886 Eth
$67,726.00
6,494.600 LINK
0.0269%
70
Slex
LINK-ETH$10.47
0.0045076 Eth
$62,349.00
5,999.940 LINK
0.0249%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.48
0.0045123 Eth
$57,874.00
5,569.286 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0231%
72
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.37
0.0044665 Eth
$57,057.00
5,415.064 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0224%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.47
0.0045196 Eth
$55,943.00
5,316.308 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0220%
74
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.40
0.0044792 Eth
$55,469.00
56,395.172 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2336%
75
LATOKEN
LINK-ETH$10.43
0.0045028 Eth
$54,356.00
5,209.884 LINK
0.0216%
76
PointPay
LINK-BTC$10.45
0.0045025 Eth
$50,759.00
4,843.151 LINK
0.0201%
77
Bitget
LINK-EUR$10.45
0.0045130 Eth
$48,172.00
4,530.730 LINK
0.0188%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.46
0.0044981 Eth
$36,883.00
3,475.328 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0144%
79
Uniswap V3 (Ethereum)
0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23-0X514910771AF9CA656AF840DFF83E8264ECF986CA$10.45
0.0044973 Eth
$36,447.00
204,498.504 0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23
0.8471%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.41
0.0044844 Eth
$32,372.00
3,100.342 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0128%
81
Binance US
LINK-USDT$10.42
0.0044909 Eth
$27,534.00
2,642.006 LINK
0.0109%
82
KuCoin
LINK-KCS$10.44
0.0045072 Eth
$16,955.61
1,623.598 LINK
0.0067%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.45
0.0044964 Eth
$15,160.39
1,444.278 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0060%
84
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$10.47
0.0045173 Eth
$10,320.99
17.791 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.42
0.0044863 Eth
$9,276.76
9,395.804 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0389%
86
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.48
0.0045088 Eth
$8,127.64
764.594 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0032%
87
CoinEx
LINK-BTC$10.42
0.0044809 Eth
$7,581.33
720.296 LINK
0.0030%
88
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.46
0.0045105 Eth
$4,777.86
460.336 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0019%
89
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.41
0.0044799 Eth
$4,163.91
392.790 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0016%
90
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.39
0.0044705 Eth
$3,243.81
313.785 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0013%
91
CoinEx
LINK-USDC$10.50
0.0045178 Eth
$3,215.46
301.928 LINK
0.0013%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.46
0.0044984 Eth
$3,172.40
300.093 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0012%
93
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.38
0.0044791 Eth
$1,944.67
188.936 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0008%
94
Honeyswap
0XE2E73A1C69ECF83F464EFCE6A5BE353A37CA09B2-0XE91D153E0B41518A2CE8DD3D7944FA863463A97D$10.35
0.0044525 Eth
$1,789.08
179.259 0XE2E73A1C69ECF83F464EFCE6A5BE353A37CA09B2
0.0007%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.48
0.0045088 Eth
$1,689.63
159.419 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0007%
96
Balancer V2 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$10.53
0.0045454 Eth
$1,154.30
109.643 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
97
Osmosis
IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049-UOSMO$10.44
0.0045073 Eth
$966.24
92.546 IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049
0.0004%
98
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$10.43
0.0044840 Eth
$718.08
67.830 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0003%
99
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$10.43
0.0044962 Eth
$704.35
713.619 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0030%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.40
0.0044770 Eth
$607.53
57.664 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
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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