ETH Price: $2,818.75 (+2.00%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,926 ( 0.071%)

Market

Price

$17.60 @ 0.006244 ETH (-1.01%)

Onchain Market Cap

$17,600,000,000.00

Circulating Supply Market Cap

$11,223,072,242.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
cryptomaniacs.eth
Balance
0 LINK

Value
$0.00
0x4d37f28d2db99e8d35a6c725a5f1749a085850a3
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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 15900% |ETH 0.0003846 1523.5%

Market

Volume (24H):$311,501,920.00
Market Capitalization:$11,223,072,242.00
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
WhiteBIT
LINK-USDT$17.58
0.0062281 Eth
$33,400,302.00
1,899,608.060 LINK
17.9387%
2
Websea
LINK-USDT$17.58
0.0062291 Eth
$32,787,673.00
0.000 LINK
0.0000%
3
Binance
LINK-USDT$17.60
0.0062408 Eth
$30,476,302.00
1,718,363.420 LINK
16.2271%
4
HTX
LINK-USDT$17.59
0.0062375 Eth
$11,977,716.00
675,965.401 LINK
6.3834%
5
BTCC
LINK-USDT$17.60
0.0062341 Eth
$10,099,753.00
569,653.610 LINK
5.3794%
6
Coinbase Exchange
LINK-USD$17.59
0.0062353 Eth
$8,505,998.00
483,597.580 LINK
4.5668%
7
Bybit
LINK-USDT$17.60
0.0062390 Eth
$7,113,059.00
400,669.833 LINK
3.7837%
8
Ourbit
LINK-USDT$17.58
0.0062300 Eth
$6,609,769.00
372,718.660 LINK
3.5197%
9
P2B
LINK-USDT$17.57
0.0062300 Eth
$6,592,340.00
375,119.900 LINK
3.5424%
10
BVOX
LINK-USDT$17.58
0.0062323 Eth
$4,761,035.00
268,534.220 LINK
2.5359%
11
Bitget
LINK-USDT$17.59
0.0062372 Eth
$4,737,924.00
266,643.058 LINK
2.5180%
12
DigiFinex
LINK-USDT$17.59
0.0062358 Eth
$3,669,963.00
208,667.980 LINK
1.9705%
13
OKX
LINK-USDT$17.58
0.0062337 Eth
$3,041,539.00
171,162.869 LINK
1.6164%
14
FameEX
LINK-USDT$17.52
0.0062107 Eth
$3,037,713.00
171,281.751 LINK
1.6175%
15
MEXC
LINK-EUR$17.57
0.0062243 Eth
$3,034,012.00
172,653.900 LINK
1.6304%
16
XT.COM
LINK-USDT$17.59
0.0062316 Eth
$3,010,406.00
169,800.270 LINK
1.6035%
17
MEXC
LINK-USDC$17.60
0.0062332 Eth
$2,923,049.00
166,100.220 LINK
1.5685%
18
LBank
LINK-USDT$17.60
0.0062355 Eth
$2,688,360.00
152,734.460 LINK
1.4423%
19
Hotcoin
LINK-USDT$17.60
0.0062341 Eth
$2,665,761.00
151,459.200 LINK
1.4303%
20
KuCoin
LINK-USDT$17.59
0.0062362 Eth
$2,522,423.00
143,412.420 LINK
1.3543%
21
Gate.io
LINK-USDT$17.58
0.0062337 Eth
$2,237,008.00
126,267.780 LINK
1.1924%
22
Binance
LINK-USDC$17.57
0.0062258 Eth
$2,219,193.00
125,025.270 LINK
1.1807%
23
BTSE
LINK-USDT$17.59
0.0062319 Eth
$2,175,239.00
123,632.681 LINK
1.1675%
24
Azbit
LINK-USDT$17.60
0.0062353 Eth
$1,881,808.00
106,127.054 LINK
1.0022%
25
Bitunix
LINK-USDT$17.60
0.0062390 Eth
$1,754,416.00
99,729.340 LINK
0.9418%
26
BYDFi
LINK-USDT$17.58
0.0062280 Eth
$1,684,494.00
95,839.300 LINK
0.9050%
27
Oceanex
LINK-USDT$17.60
0.0062323 Eth
$1,661,251.00
94,413.670 LINK
0.8916%
28
Toobit
LINK-USDT$17.58
0.0062337 Eth
$1,499,888.00
84,554.550 LINK
0.7985%
29
FMCPAY
LINK-USDT$17.57
0.0062302 Eth
$1,491,039.00
84,156.594 LINK
0.7947%
30
Biconomy.com
LINK-USDT$17.59
0.0062340 Eth
$1,120,931.00
63,208.470 LINK
0.5969%
31
Kraken
LINK-USD$17.59
0.0062349 Eth
$983,243.00
55,913.603 LINK
0.5280%
32
Dex-Trade
LINK-USDT$17.68
0.0062575 Eth
$978,365.00
55,351.586 LINK
0.5227%
33
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.64
0.0062548 Eth
$897,818.00
50,115.413 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4733%
34
FMCPAY
LINK-ETH$17.59
0.0062362 Eth
$889,464.00
49,685.920 LINK
0.4692%
35
CoinEx
LINK-USDT$17.58
0.0062274 Eth
$816,883.00
46,030.291 LINK
0.4347%
36
FMCPAY
LINK-BTC$17.58
0.0062280 Eth
$781,495.00
44,115.800 LINK
0.4166%
37
Bitvavo
LINK-EUR$17.59
0.0062319 Eth
$694,659.00
39,484.066 LINK
0.3729%
38
Binance
LINK-ETH$17.54
0.0062219 Eth
$686,426.00
38,614.550 LINK
0.3647%
39
tanX
LINK-USDC$17.59
0.0062370 Eth
$637,320.00
35,943.320 LINK
0.3394%
40
Coinbase Exchange
LINK-EUR$17.57
0.0062258 Eth
$509,972.00
29,020.520 LINK
0.2741%
41
Coinbase Exchange
LINK-GBP$17.59
0.0062315 Eth
$392,324.00
22,305.170 LINK
0.2106%
42
BigONE
LINK-USDT$17.52
0.0062130 Eth
$336,286.00
19,190.810 LINK
0.1812%
43
BitMart
LINK-BTC$17.59
0.0062341 Eth
$277,694.00
15,786.600 LINK
0.1491%
44
WhiteBIT
LINK-BTC$17.60
0.0062371 Eth
$275,946.00
15,678.560 LINK
0.1481%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.58
0.0062305 Eth
$265,209.00
14,957.462 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1412%
46
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.58
0.0062309 Eth
$218,376.00
220,207.058 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.0795%
47
LATOKEN
LINK-BTC$17.60
0.0062349 Eth
$213,401.00
12,126.138 LINK
0.1145%
48
Bitbank
LINK-JPY$17.73
0.0062837 Eth
$208,788.00
11,778.114 LINK
0.1112%
49
Bitci TR
LINK-TRY$17.48
0.0061927 Eth
$185,413.00
10,439.530 LINK
0.0986%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.52
0.0062100 Eth
$184,503.00
10,268.773 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0970%
51
BitStorage
LINK-ETH$17.58
0.0062300 Eth
$179,333.00
10,198.450 LINK
0.0963%
52
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.53
0.0062159 Eth
$176,688.00
19,757.055 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1866%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.52
0.0062100 Eth
$175,869.00
9,914.809 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0936%
54
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.55
0.0062184 Eth
$175,588.00
9,797.789 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0925%
55
Slex
LINK-ETH$17.59
0.0062352 Eth
$168,800.00
9,481.120 LINK
0.0895%
56
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.64
0.0062548 Eth
$156,950.00
8,803.569 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0831%
57
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.55
0.0062199 Eth
$139,409.00
7,904.976 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0746%
58
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.59
0.0062342 Eth
$113,872.00
6,316.252 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0596%
59
Bybit
LINK-USDC$17.52
0.0062119 Eth
$103,378.00
5,868.728 LINK
0.0554%
60
Coinbase Exchange
LINK-ETH$17.68
0.0062676 Eth
$97,745.00
5,528.580 LINK
0.0522%
61
Hotcoin
LINK-BTC$17.63
0.0062503 Eth
$89,573.00
5,080.100 LINK
0.0480%
62
BitMart
LINK-ETH$17.60
0.0062399 Eth
$87,735.00
4,984.560 LINK
0.0471%
63
BYDFi
LINK-USDC$17.52
0.0062063 Eth
$79,182.00
4,519.020 LINK
0.0427%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.59
0.0062344 Eth
$73,418.00
4,097.233 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0387%
65
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.54
0.0062185 Eth
$72,172.00
4,072.499 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0385%
66
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.56
0.0062267 Eth
$46,659.00
2,631.035 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0248%
67
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.64
0.0062548 Eth
$46,240.00
46,565.488 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4397%
68
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.54
0.0062195 Eth
$46,149.00
2,582.168 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0244%
69
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.56
0.0062247 Eth
$39,945.00
40,397.005 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3815%
70
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.62
0.0062435 Eth
$34,776.00
1,970.066 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0186%
71
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.59
0.0062364 Eth
$25,994.00
1,446.778 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0137%
72
Dex-Trade
LINK-ETH$17.56
0.0062212 Eth
$23,413.00
1,333.000 LINK
0.0126%
73
EXMO
LINK-BTC$17.55
0.0062249 Eth
$21,883.00
1,246.817 LINK
0.0118%
74
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.67
0.0062645 Eth
$17,536.82
17,610.444 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1663%
75
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.53
0.0062159 Eth
$12,684.97
716.756 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0068%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.58
0.0062304 Eth
$10,982.30
618.756 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0058%
77
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.58
0.0062338 Eth
$8,919.59
504.863 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0048%
78
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.60
0.0062404 Eth
$7,104.47
7,153.084 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0675%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.56
0.0062252 Eth
$6,434.67
362.574 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0034%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.64
0.0062527 Eth
$5,868.85
326.546 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0031%
81
Bitexen
LINK-TRY$17.45
0.0061825 Eth
$4,699.61
269.391 LINK
0.0025%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$17.64
0.0062515 Eth
$4,690.80
264.466 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0025%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.63
0.0062518 Eth
$4,147.21
4,177.866 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0395%
84
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.54
0.0062163 Eth
$4,017.30
227.130 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0021%
85
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.50
0.0062031 Eth
$3,978.32
482.414 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0046%
86
CoinEx
LINK-USDC$17.60
0.0062368 Eth
$3,813.49
215.740 LINK
0.0020%
87
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$17.53
0.0062124 Eth
$3,405.43
192.353 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0018%
88
Uniswap V4 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.57
0.0062239 Eth
$3,102.31
3,135.040 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0296%
89
CoinEx
LINK-BTC$17.62
0.0062433 Eth
$3,031.64
170.618 LINK
0.0016%
90
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.52
0.0062092 Eth
$2,384.18
9.758 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0001%
91
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.58
0.0062339 Eth
$1,041.91
58.110 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
92
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.65
0.0062536 Eth
$980.66
53.090 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0005%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$17.52
0.0062127 Eth
$923.80
52.296 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
94
KuCoin
LINK-KCS$17.55
0.0062210 Eth
$840.32
47.893 LINK
0.0005%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$17.60
0.0062331 Eth
$821.73
46.138 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
96
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XD036414FA2BCBB802691491E323BFF1348C5F4BA$17.59
0.0062400 Eth
$795.35
44.998 0X5947BB275C521040051D82396192181B413227A3
0.0004%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$17.61
0.0062380 Eth
$705.55
39.196 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$17.58
0.0062253 Eth
$676.89
37.925 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
99
Osmosis
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0.0062776 Eth
$321.08
18.134 IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049
0.0002%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.53
0.0062168 Eth
$180.12
10.183 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%

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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