ETH Price: $2,512.14 (+0.53%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,198 (0.00%)

Market

Price

$10.90 @ 0.004339 ETH (-2.04%)

Onchain Market Cap

$10,900,000,000.00

Circulating Supply Market Cap

$6,819,776,985.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xaa0b1d3289e7fd417440536abfd9a62662232a0e
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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 9809.09% |ETH 0.0003846 1028.19%

Market

Volume (24H):$338,731,127.00
Market Capitalization:$6,819,776,985.00
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
WhiteBIT
LINK-USDT$10.90
0.0043362 Eth
$21,926,381.00
2,012,361.880 LINK
13.6612%
2
Binance
LINK-USDT$10.90
0.0043383 Eth
$20,959,429.00
1,910,663.820 LINK
12.9708%
3
Coinbase Exchange
LINK-USD$10.89
0.0043345 Eth
$11,713,476.00
1,075,420.150 LINK
7.3007%
4
HTX
LINK-USDT$10.88
0.0043334 Eth
$10,460,277.00
954,176.895 LINK
6.4776%
5
Bitget
LINK-USDT$10.89
0.0043374 Eth
$8,870,766.00
808,867.436 LINK
5.4911%
6
Bybit
LINK-USDT$10.89
0.0043360 Eth
$7,709,716.00
701,849.381 LINK
4.7646%
7
P2B
LINK-USDT$10.89
0.0043348 Eth
$4,274,763.00
392,530.220 LINK
2.6648%
8
WEEX
LINK-USDT$10.89
0.0043342 Eth
$4,207,244.00
383,457.240 LINK
2.6032%
9
Azbit
LINK-USDT$10.89
0.0043350 Eth
$4,095,468.00
373,351.580 LINK
2.5346%
10
OKX
LINK-USDT$10.89
0.0043360 Eth
$4,072,620.00
371,390.367 LINK
2.5212%
11
BTSE
LINK-USDT$10.90
0.0043374 Eth
$3,957,484.00
363,222.665 LINK
2.4658%
12
Upbit
LINK-KRW$10.98
0.0043716 Eth
$3,758,467.00
342,218.335 LINK
2.3232%
13
Ourbit
LINK-USDT$10.89
0.0043342 Eth
$3,610,838.00
329,284.370 LINK
2.2354%
14
Slex
LINK-USDT$10.90
0.0043386 Eth
$3,517,273.00
320,671.300 LINK
2.1769%
15
Biconomy.com
LINK-USDT$10.89
0.0043350 Eth
$3,275,247.00
298,767.170 LINK
2.0282%
16
Trubit
LINK-USDT$10.90
0.0043401 Eth
$3,190,634.00
290,602.760 LINK
1.9728%
17
DigiFinex
LINK-USDT$10.89
0.0043351 Eth
$2,794,586.00
256,688.970 LINK
1.7426%
18
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.93
0.0043502 Eth
$2,709,545.00
246,211.597 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.6714%
19
ProBit Global
LINK-USDT$10.84
0.0043256 Eth
$2,412,743.00
222,554.480 LINK
1.5108%
20
CoinW
LINK-USDT$10.90
0.0043364 Eth
$2,200,578.00
201,973.790 LINK
1.3711%
21
XT.COM
LINK-USDT$10.90
0.0043382 Eth
$2,094,956.00
190,945.660 LINK
1.2963%
22
Niza Global
LINK-USD$10.89
0.0043354 Eth
$1,973,034.00
179,323.034 LINK
1.2174%
23
Kraken
LINK-USD$10.89
0.0043377 Eth
$1,952,747.00
179,253.352 LINK
1.2169%
24
Hotcoin
LINK-USDT$10.90
0.0043382 Eth
$1,834,531.00
168,294.160 LINK
1.1425%
25
Bitunix
LINK-USDT$10.90
0.0043366 Eth
$1,817,364.00
166,871.770 LINK
1.1328%
26
LBank
LINK-USDT$10.88
0.0043302 Eth
$1,708,347.00
157,004.100 LINK
1.0658%
27
AscendEX (BitMax)
LINK-USDT$10.84
0.0043131 Eth
$1,698,926.00
156,792.200 LINK
1.0644%
28
Coinstore
LINK-USDT$10.88
0.0043323 Eth
$1,493,294.00
136,234.820 LINK
0.9249%
29
HashKey Global
LINK-USDT$10.79
0.0043170 Eth
$1,097,622.00
101,647.500 LINK
0.6901%
30
BYDFi
LINK-USDT$10.89
0.0043352 Eth
$992,179.00
91,100.120 LINK
0.6184%
31
Azbit
LINK-ETH$10.89
0.0043322 Eth
$785,587.00
71,369.608 LINK
0.4845%
32
Bitvavo
LINK-EUR$10.90
0.0043371 Eth
$733,510.00
67,320.774 LINK
0.4570%
33
Bithumb
LINK-KRW$11.01
0.0043831 Eth
$714,365.00
64,874.315 LINK
0.4404%
34
Dex-Trade
LINK-USDT$10.89
0.0043345 Eth
$694,486.00
63,773.111 LINK
0.4329%
35
CoinEx
LINK-USDT$10.91
0.0043450 Eth
$668,849.00
60,983.400 LINK
0.4140%
36
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.85
0.0043202 Eth
$592,973.00
53,992.323 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3665%
37
AscendEX (BitMax)
LINK-BTC$10.90
0.0043388 Eth
$543,614.00
49,871.500 LINK
0.3386%
38
tanX
LINK-USDC$10.93
0.0043494 Eth
$506,363.00
46,128.020 LINK
0.3131%
39
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.88
0.0043303 Eth
$434,974.00
39,667.900 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2693%
40
LATOKEN
LINK-USDT$10.86
0.0043311 Eth
$397,476.00
36,584.363 LINK
0.2484%
41
BigONE
LINK-USDT$10.87
0.0043246 Eth
$394,989.00
36,353.650 LINK
0.2468%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.89
0.0043362 Eth
$368,200.00
34,487.429 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2341%
43
PointPay
LINK-USDT$10.90
0.0043392 Eth
$345,944.00
31,539.166 LINK
0.2141%
44
LATOKEN
LINK-BTC$10.90
0.0043372 Eth
$303,432.00
27,843.706 LINK
0.1890%
45
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.89
0.0043347 Eth
$291,209.00
26,485.883 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1798%
46
WhiteBIT
LINK-EUR$10.87
0.0043308 Eth
$246,161.00
22,639.230 LINK
0.1537%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.92
0.0043484 Eth
$237,255.00
21,600.123 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1466%
48
Phemex
LINK-USDT$10.90
0.0043388 Eth
$211,337.00
19,387.430 LINK
0.1316%
49
EXMO
LINK-USDT$10.89
0.0043359 Eth
$210,283.00
19,311.454 LINK
0.1311%
50
Bybit
LINK-USDC$10.90
0.0043403 Eth
$195,584.00
17,821.495 LINK
0.1210%
51
BitMart
LINK-BTC$10.89
0.0043361 Eth
$192,434.00
17,664.180 LINK
0.1199%
52
Hotcoin
LINK-BTC$10.90
0.0043366 Eth
$185,985.00
17,067.830 LINK
0.1159%
53
WhiteBIT
LINK-TRY$10.98
0.0043703 Eth
$173,146.00
15,770.300 LINK
0.1071%
54
Coinbase Exchange
LINK-ETH$10.90
0.0043386 Eth
$165,921.00
15,219.240 LINK
0.1033%
55
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.90
0.0043419 Eth
$164,682.00
15,107.598 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1026%
56
Gemini
LINK-USD$10.91
0.0043413 Eth
$158,796.00
14,559.772 LINK
0.0988%
57
BitDelta
LINK-USDT$10.89
0.0043352 Eth
$139,461.00
12,714.000 LINK
0.0863%
58
Hotcoin
LINK-ETH$10.89
0.0043332 Eth
$124,294.00
11,415.280 LINK
0.0775%
59
Bitci TR
LINK-TRY$11.01
0.0043840 Eth
$109,424.00
9,911.290 LINK
0.0673%
60
Coinbase Exchange
LINK-BTC$10.84
0.0043150 Eth
$109,385.00
10,091.540 LINK
0.0685%
61
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.90
0.0043400 Eth
$102,478.00
9,365.223 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0636%
62
BYDFi
LINK-USDC$10.90
0.0043380 Eth
$102,046.00
9,361.530 LINK
0.0636%
63
Coinbase Exchange
LINK-GBP$10.89
0.0043377 Eth
$94,243.00
8,651.120 LINK
0.0587%
64
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.91
0.0043442 Eth
$88,742.00
89,143.813 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6052%
65
Slex
LINK-BTC$10.87
0.0043308 Eth
$84,330.00
7,622.700 LINK
0.0517%
66
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.85
0.0043192 Eth
$75,902.00
76,655.709 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5204%
67
OKX
LINK-USDC$10.93
0.0043501 Eth
$70,415.00
6,405.593 LINK
0.0435%
68
Slex
LINK-ETH$10.88
0.0043315 Eth
$62,035.00
5,635.380 LINK
0.0383%
69
GMO Japan
LINK-JPY$10.87
0.0043266 Eth
$54,575.00
5,020.200 LINK
0.0341%
70
PointPay
LINK-BTC$10.88
0.0043317 Eth
$54,280.00
4,909.105 LINK
0.0333%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.89
0.0043357 Eth
$51,891.00
4,742.917 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0322%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.91
0.0043442 Eth
$51,026.00
4,643.872 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0315%
73
Bitkub
LINK-THB$10.93
0.0043511 Eth
$47,363.00
4,334.365 LINK
0.0294%
74
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.85
0.0043202 Eth
$27,148.00
27,602.586 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1874%
75
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.84
0.0043139 Eth
$26,640.00
2,417.446 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0164%
76
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.90
0.0043383 Eth
$26,548.00
2,423.313 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0165%
77
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.88
0.0043291 Eth
$25,728.00
25,970.765 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1763%
78
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.86
0.0043253 Eth
$24,295.00
2,215.545 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0150%
79
Bitcointry
LINK-USDT$10.91
0.0043423 Eth
$23,773.00
2,162.714 LINK
0.0147%
80
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.88
0.0043299 Eth
$19,828.29
1,888.357 0X5947BB275C521040051D82396192181B413227A3
0.0128%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.87
0.0043268 Eth
$19,513.37
1,820.295 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0124%
82
Nonkyc.io
LINK-BTC$10.93
0.0043495 Eth
$19,094.30
1,723.826 LINK
0.0117%
83
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.79
0.0042945 Eth
$16,648.34
1,589.666 0X5947BB275C521040051D82396192181B413227A3
0.0108%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.89
0.0043349 Eth
$15,117.35
1,376.043 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0093%
85
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$10.91
0.0043423 Eth
$14,875.23
1,356.276 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0092%
86
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$10.87
0.0043268 Eth
$12,611.12
19.609 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.86
0.0043213 Eth
$9,442.52
864.407 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0059%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.89
0.0043370 Eth
$7,370.42
668.489 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0045%
89
CoinEx
LINK-BTC$10.85
0.0043171 Eth
$7,016.55
633.574 LINK
0.0043%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.87
0.0043250 Eth
$7,003.92
642.429 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0044%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.91
0.0043404 Eth
$4,708.48
429.372 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0029%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.86
0.0043215 Eth
$2,320.51
212.137 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0014%
93
CoinEx
LINK-USDC$10.90
0.0043400 Eth
$2,231.88
203.843 LINK
0.0014%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.86
0.0043207 Eth
$1,462.86
131.869 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0009%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$10.91
0.0043442 Eth
$874.68
80.951 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$10.89
0.0043446 Eth
$794.49
72.210 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
97
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$10.88
0.0043306 Eth
$774.47
776.887 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0053%
98
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$10.78
0.0042896 Eth
$766.52
70.307 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0005%
99
Uniswap V3 (Ethereum)
0X5B52BFB8062CE664D74BBCD4CD6DC7DF53FD7233-0X514910771AF9CA656AF840DFF83E8264ECF986CA$10.93
0.0043482 Eth
$524.23
81,292.077 0X5B52BFB8062CE664D74BBCD4CD6DC7DF53FD7233
0.5519%
100
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X7130D2A12B9BCBFAE4F2634D864A1EE1CE3EAD9C$10.87
0.0043247 Eth
$288.25
26.252 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
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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