ETH Price: $2,708.84 (+0.94%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

734,676 ( 0.014%)

Market

Price

$19.04 @ 0.007029 ETH (+1.50%)

Onchain Market Cap

$19,040,000,000.00

Circulating Supply Market Cap

$12,153,593,063.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.23115793 LINK

Value
$4.40 ( ~0.00162431322698553 Eth) [0.0000%]
0x071b6A405e79d8F0E93871Bc78174735579167f7
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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 17209.09% |ETH 0.0003846 1727.61%

Market

Volume (24H):$429,196,212.00
Market Capitalization:$12,153,593,063.00
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
Coinbase Exchange
LINK-USD$19.03
0.0070184 Eth
$29,050,993.00
1,526,990.430 LINK
14.2020%
2
MEXC
LINK-USDT$19.06
0.0070370 Eth
$24,059,402.00
1,261,968.690 LINK
11.7371%
3
Bybit
LINK-USDT$19.05
0.0070296 Eth
$23,237,518.00
1,252,005.567 LINK
11.6445%
4
HTX
LINK-USDT$19.05
0.0070292 Eth
$19,576,980.00
1,052,497.242 LINK
9.7889%
5
P2B
LINK-USDT$19.02
0.0070181 Eth
$8,658,284.00
455,140.990 LINK
4.2331%
6
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.06
0.0070330 Eth
$7,685,047.00
407,976.074 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.7944%
7
OKX
LINK-USDT$19.05
0.0070276 Eth
$6,189,679.00
332,927.026 LINK
3.0964%
8
Gate.io
LINK-USDT$19.05
0.0070289 Eth
$5,316,029.00
286,212.580 LINK
2.6620%
9
WhiteBIT
LINK-USDT$19.04
0.0070241 Eth
$5,121,269.00
268,908.360 LINK
2.5010%
10
KuCoin
LINK-USDT$19.05
0.0070299 Eth
$4,631,344.00
243,061.622 LINK
2.2606%
11
XT.COM
LINK-USDT$19.04
0.0070287 Eth
$4,166,996.00
224,174.640 LINK
2.0850%
12
BTSE
LINK-USDT$19.03
0.0070218 Eth
$4,134,487.00
217,281.595 LINK
2.0209%
13
Hotcoin
LINK-USDT$19.06
0.0070362 Eth
$4,068,797.00
213,431.180 LINK
1.9850%
14
Coinstore
LINK-USDT$19.03
0.0070210 Eth
$3,703,779.00
199,347.000 LINK
1.8541%
15
CoinW
LINK-USDT$19.03
0.0070249 Eth
$3,411,011.00
179,229.930 LINK
1.6670%
16
Kraken
LINK-USD$19.06
0.0070304 Eth
$3,406,104.00
178,730.090 LINK
1.6623%
17
Bitunix
LINK-USDT$19.05
0.0070274 Eth
$3,134,007.00
164,479.720 LINK
1.5298%
18
Azbit
LINK-USDT$19.03
0.0070250 Eth
$2,485,278.00
133,707.922 LINK
1.2436%
19
BYDFi
LINK-USDT$19.02
0.0070213 Eth
$2,390,500.00
125,659.990 LINK
1.1687%
20
LATOKEN
LINK-USDT$19.06
0.0070361 Eth
$2,041,131.00
107,069.346 LINK
0.9958%
21
QMall
LINK-USDT$19.03
0.0070226 Eth
$1,714,411.00
92,230.595 LINK
0.8578%
22
FMCPAY
LINK-USDT$19.05
0.0070281 Eth
$1,695,447.00
91,234.618 LINK
0.8485%
23
Coinbase Exchange
LINK-EUR$19.07
0.0070361 Eth
$1,414,268.00
74,151.340 LINK
0.6897%
24
Dex-Trade
LINK-USDT$19.04
0.0070248 Eth
$1,375,590.00
72,232.280 LINK
0.6718%
25
Biconomy.com
LINK-USDT$19.04
0.0070258 Eth
$1,313,695.00
70,641.710 LINK
0.6570%
26
FMCPAY
LINK-ETH$19.06
0.0070331 Eth
$1,148,120.00
60,839.680 LINK
0.5658%
27
Bitvavo
LINK-EUR$19.07
0.0070394 Eth
$1,086,576.00
56,981.009 LINK
0.5300%
28
FMCPAY
LINK-BTC$19.06
0.0070369 Eth
$1,009,347.00
53,899.600 LINK
0.5013%
29
Coinbase Exchange
LINK-GBP$19.03
0.0070201 Eth
$889,224.00
46,728.970 LINK
0.4346%
30
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.03
0.0070218 Eth
$881,078.00
46,633.000 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4337%
31
CoinEx
LINK-USDT$19.07
0.0070351 Eth
$825,921.00
44,591.662 LINK
0.4147%
32
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.03
0.0070210 Eth
$811,772.00
42,995.822 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3999%
33
tanX
LINK-USDC$19.05
0.0070331 Eth
$749,704.00
40,258.420 LINK
0.3744%
34
Trubit
LINK-USDT$19.04
0.0070255 Eth
$731,024.00
39,346.210 LINK
0.3659%
35
PointPay
LINK-USDT$19.04
0.0070261 Eth
$646,064.00
34,739.324 LINK
0.3231%
36
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.91
0.0069755 Eth
$608,197.00
33,853.746 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.3149%
37
WhiteBIT
LINK-BTC$19.02
0.0070178 Eth
$535,007.00
28,124.820 LINK
0.2616%
38
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.06
0.0070323 Eth
$532,520.00
28,218.820 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2625%
39
BigONE
LINK-USDT$19.00
0.0070117 Eth
$504,944.00
26,582.190 LINK
0.2472%
40
EXMO
LINK-USDT$19.07
0.0070334 Eth
$482,420.00
25,303.400 LINK
0.2353%
41
Binance
LINK-TRY$19.01
0.0070111 Eth
$430,141.00
23,204.800 LINK
0.2158%
42
LATOKEN
LINK-BTC$19.01
0.0070186 Eth
$405,320.00
21,318.110 LINK
0.1983%
43
Bitbegin
LINK-USDT$19.04
0.0070256 Eth
$404,355.00
21,754.284 LINK
0.2023%
44
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.03
0.0070198 Eth
$400,632.00
21,223.852 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1974%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.06
0.0070302 Eth
$387,766.00
20,908.548 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1945%
46
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.06
0.0070302 Eth
$379,488.00
369,479.480 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.4364%
47
Bitbank
LINK-JPY$19.05
0.0070262 Eth
$367,669.00
19,302.597 LINK
0.1795%
48
QMall
LINK-USDC$19.06
0.0070305 Eth
$335,488.00
18,075.734 LINK
0.1681%
49
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.05
0.0070328 Eth
$316,884.00
31,667.411 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2945%
50
Gemini
LINK-USD$19.06
0.0070313 Eth
$306,482.00
16,079.851 LINK
0.1496%
51
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.01
0.0070150 Eth
$261,853.00
14,144.997 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1316%
52
BitMart
LINK-BTC$19.05
0.0070286 Eth
$258,966.00
13,592.280 LINK
0.1264%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.04
0.0070224 Eth
$255,702.00
13,546.218 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1260%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.06
0.0070302 Eth
$247,826.00
13,130.390 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1221%
55
Coinbase Exchange
LINK-USDT$19.08
0.0070369 Eth
$218,910.00
11,476.142 LINK
0.1067%
56
BitDelta
LINK-USDT$19.03
0.0070262 Eth
$207,607.00
11,174.000 LINK
0.1039%
57
OKX
LINK-USDC$19.07
0.0070357 Eth
$205,843.00
11,112.521 LINK
0.1034%
58
Bitci TR
LINK-TRY$19.08
0.0070423 Eth
$194,703.00
10,485.960 LINK
0.0975%
59
GMO Japan
LINK-JPY$19.11
0.0070505 Eth
$182,502.00
9,549.100 LINK
0.0888%
60
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.93
0.0069859 Eth
$147,809.00
7,968.658 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0741%
61
Slex
LINK-ETH$19.04
0.0070280 Eth
$147,351.00
7,817.590 LINK
0.0727%
62
Hotcoin
LINK-BTC$19.03
0.0070259 Eth
$144,208.00
7,576.260 LINK
0.0705%
63
BYDFi
LINK-USDC$18.98
0.0070039 Eth
$133,808.00
7,050.080 LINK
0.0656%
64
BitStorage
LINK-ETH$19.09
0.0070427 Eth
$126,341.00
6,617.970 LINK
0.0616%
65
Kraken
LINK-GBP$19.05
0.0070271 Eth
$124,088.00
6,514.413 LINK
0.0606%
66
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.06
0.0070297 Eth
$123,722.00
6,663.094 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0620%
67
WhiteBIT
LINK-TRY$18.98
0.0070017 Eth
$113,109.00
5,959.730 LINK
0.0554%
68
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.92
0.0069792 Eth
$94,414.00
5,278.827 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0491%
69
Kanga
LINK-PLN$19.16
0.0070693 Eth
$84,710.00
0.000 LINK
0.0000%
70
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.03
0.0070218 Eth
$84,453.00
82,144.893 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.7640%
71
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.00
0.0070125 Eth
$77,273.00
4,189.778 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0390%
72
Bitkub
LINK-THB$19.05
0.0070263 Eth
$76,539.00
4,018.712 LINK
0.0374%
73
BitMart
LINK-ETH$19.06
0.0070322 Eth
$69,997.00
3,671.940 LINK
0.0342%
74
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$19.03
0.0070219 Eth
$65,223.00
3,482.899 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0324%
75
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.96
0.0069964 Eth
$54,962.00
2,912.005 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0271%
76
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.05
0.0070262 Eth
$51,454.00
50,190.454 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4668%
77
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$19.07
0.0070341 Eth
$49,558.00
64.318 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0006%
78
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.04
0.0070245 Eth
$45,551.00
2,413.851 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0225%
79
Hotcoin
LINK-ETH$19.03
0.0070247 Eth
$39,492.00
2,075.160 LINK
0.0193%
80
Mercado Bitcoin
LINK-BRL$19.00
0.0070101 Eth
$37,255.00
1,960.646 LINK
0.0182%
81
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.03
0.0070196 Eth
$31,121.00
1,649.315 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0153%
82
EXMO
LINK-BTC$19.14
0.0070602 Eth
$29,731.00
1,553.521 LINK
0.0144%
83
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$18.93
0.0069830 Eth
$23,679.00
1,355.670 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0126%
84
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$19.05
0.0070328 Eth
$20,941.00
1,125.745 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0105%
85
Dex-Trade
LINK-ETH$19.07
0.0070339 Eth
$17,265.49
905.600 LINK
0.0084%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.06
0.0070302 Eth
$17,034.24
901.840 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0084%
87
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.02
0.0070219 Eth
$14,679.77
56.418 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0005%
88
Biswap V3
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.97
0.0069975 Eth
$14,617.74
814.748 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0076%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$19.04
0.0070237 Eth
$10,852.39
583.878 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0054%
90
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.05
0.0070312 Eth
$10,171.32
9,922.747 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0923%
91
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.01
0.0070113 Eth
$8,781.12
472.359 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0044%
92
CoinEx
LINK-USDC$18.99
0.0070039 Eth
$8,500.18
454.689 LINK
0.0042%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.02
0.0070216 Eth
$7,957.41
418.887 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0039%
94
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.93
0.0069876 Eth
$7,562.43
420.710 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0039%
95
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.07
0.0070370 Eth
$6,409.08
24.570 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0002%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.95
0.0069960 Eth
$4,820.43
256.437 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0024%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$19.02
0.0070149 Eth
$4,561.28
243.534 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0023%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$19.13
0.0070600 Eth
$4,224.55
221.725 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0021%
99
Gemini
LINK-BTC$19.01
0.0070138 Eth
$3,785.21
199.089 LINK
0.0019%
100
CoinEx
LINK-BTC$18.97
0.0069984 Eth
$3,253.57
173.703 LINK
0.0016%

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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