ETH Price: $2,556.62 (-2.08%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,004 ( 0.015%)

Market

Price

$11.73 @ 0.004588 ETH (-2.81%)

Onchain Market Cap

$11,730,000,000.00

Circulating Supply Market Cap

$7,352,480,750.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
178.78673382 LINK

Value
$2,097.17 ( ~0.820289753162576 Eth) [0.0000%]
0xBA40C4e5AcC07959735E8aAfB2757daaB3b1aECA
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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 10563.64% |ETH 0.0003846 1092.93%

Market

Volume (24H):$369,668,455.00
Market Capitalization:$7,352,480,750.00
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$11.80
0.0045907 Eth
$36,117,085.00
3,061,000.460 LINK
21.0850%
2
Coinbase Exchange
LINK-USD$11.77
0.0045817 Eth
$16,424,058.00
1,395,535.560 LINK
9.6128%
3
WhiteBIT
LINK-USDT$11.77
0.0045770 Eth
$15,684,086.00
1,332,084.550 LINK
9.1758%
4
Bybit
LINK-USDT$11.72
0.0045659 Eth
$15,587,190.00
1,299,271.581 LINK
8.9497%
5
HTX
LINK-USDT$11.75
0.0045792 Eth
$13,678,758.00
1,137,990.218 LINK
7.8388%
6
Bitget
LINK-USDT$11.72
0.0045698 Eth
$9,823,186.00
815,271.168 LINK
5.6158%
7
Azbit
LINK-USDT$11.80
0.0045887 Eth
$5,381,884.00
446,935.140 LINK
3.0786%
8
Biconomy.com
LINK-USDT$11.76
0.0045788 Eth
$4,830,081.00
401,267.950 LINK
2.7640%
9
P2B
LINK-USDT$11.77
0.0045869 Eth
$4,566,811.00
387,986.630 LINK
2.6726%
10
Slex
LINK-USDT$11.77
0.0045726 Eth
$3,650,978.00
303,756.040 LINK
2.0924%
11
OKX
LINK-USDT$11.73
0.0045656 Eth
$3,551,829.00
296,492.491 LINK
2.0423%
12
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.78
0.0045868 Eth
$3,270,110.00
275,911.081 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.9006%
13
KuCoin
LINK-USDT$11.72
0.0045675 Eth
$2,543,562.00
217,071.121 LINK
1.4952%
14
XT.COM
LINK-USDT$11.81
0.0045882 Eth
$2,365,635.00
197,394.240 LINK
1.3597%
15
Upbit
LINK-KRW$11.74
0.0045753 Eth
$2,015,553.00
171,716.767 LINK
1.1828%
16
Trubit
LINK-USDT$11.73
0.0045683 Eth
$1,880,954.00
156,414.910 LINK
1.0774%
17
CoinW
LINK-USDT$11.75
0.0045745 Eth
$1,805,839.00
153,707.900 LINK
1.0588%
18
Coinstore
LINK-USDT$11.79
0.0045853 Eth
$1,706,093.00
142,333.740 LINK
0.9804%
19
AscendEX (BitMax)
LINK-USDT$11.74
0.0045784 Eth
$1,665,937.00
141,932.200 LINK
0.9777%
20
C-Patex
LINK-USDT$11.80
0.0045854 Eth
$1,610,476.00
136,529.667 LINK
0.9405%
21
Kraken
LINK-USD$11.72
0.0045690 Eth
$1,548,309.00
132,056.460 LINK
0.9096%
22
WhiteBIT
LINK-BTC$11.76
0.0045795 Eth
$1,534,085.00
130,410.040 LINK
0.8983%
23
HashKey Global
LINK-USDT$11.85
0.0046025 Eth
$1,360,634.00
112,175.315 LINK
0.7727%
24
BTSE
LINK-USDT$11.76
0.0045734 Eth
$1,290,088.00
109,655.462 LINK
0.7553%
25
BYDFi
LINK-USDT$11.89
0.0045942 Eth
$1,095,498.00
92,154.220 LINK
0.6348%
26
FMCPAY
LINK-USDT$11.79
0.0045853 Eth
$959,311.00
79,957.896 LINK
0.5508%
27
Bitexen
LINK-TRY$11.82
0.0045954 Eth
$957,591.00
81,031.140 LINK
0.5582%
28
Bitexen
LINK-USDT$11.81
0.0045907 Eth
$940,859.00
79,696.000 LINK
0.5490%
29
Azbit
LINK-ETH$11.79
0.0045829 Eth
$937,407.00
79,327.563 LINK
0.5464%
30
Dex-Trade
LINK-USDT$11.78
0.0045746 Eth
$829,465.00
70,425.490 LINK
0.4851%
31
Bitvavo
LINK-EUR$11.76
0.0045794 Eth
$647,959.00
55,093.088 LINK
0.3795%
32
Bithumb
LINK-KRW$11.81
0.0045957 Eth
$646,362.00
54,750.107 LINK
0.3771%
33
CoinEx
LINK-USDT$11.73
0.0045761 Eth
$586,804.00
48,644.876 LINK
0.3351%
34
BigONE
LINK-USDT$11.78
0.0045848 Eth
$570,308.00
48,425.370 LINK
0.3336%
35
FMCPAY
LINK-BTC$11.78
0.0045835 Eth
$549,516.00
46,288.300 LINK
0.3188%
36
Bybit
LINK-USDC$11.74
0.0045748 Eth
$538,004.00
44,832.383 LINK
0.3088%
37
FMCPAY
LINK-ETH$11.78
0.0045818 Eth
$480,447.00
40,661.760 LINK
0.2801%
38
Coinbase Exchange
LINK-USDT$11.81
0.0045961 Eth
$480,179.00
40,672.132 LINK
0.2802%
39
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.70
0.0045547 Eth
$465,893.00
39,671.574 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2733%
40
WhiteBIT
LINK-EUR$11.71
0.0045536 Eth
$448,226.00
38,264.310 LINK
0.2636%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.76
0.0045724 Eth
$403,382.00
34,293.567 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2362%
42
PointPay
LINK-USDT$11.77
0.0045870 Eth
$394,323.00
32,914.679 LINK
0.2267%
43
LATOKEN
LINK-USDT$11.78
0.0045805 Eth
$350,621.00
29,756.578 LINK
0.2050%
44
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.79
0.0045851 Eth
$335,283.00
28,447.293 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1960%
45
EXMO
LINK-USDT$11.74
0.0045767 Eth
$335,030.00
28,526.876 LINK
0.1965%
46
Gemini
LINK-USD$11.71
0.0045650 Eth
$295,583.00
25,239.347 LINK
0.1739%
47
Phemex
LINK-USDT$11.75
0.0045742 Eth
$285,306.00
24,286.320 LINK
0.1673%
48
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.77
0.0045897 Eth
$250,649.00
21,233.884 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1463%
49
itBit
LINK-USD$11.79
0.0045832 Eth
$242,591.00
20,575.957 LINK
0.1417%
50
Kraken
LINK-XBT$11.77
0.0045862 Eth
$221,656.00
18,834.014 LINK
0.1297%
51
BitMart
LINK-BTC$11.78
0.0045812 Eth
$179,287.00
15,218.240 LINK
0.1048%
52
BitDelta
LINK-USDT$11.77
0.0045870 Eth
$152,174.00
12,664.000 LINK
0.0872%
53
LATOKEN
LINK-BTC$11.80
0.0045868 Eth
$148,125.00
12,553.849 LINK
0.0865%
54
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.70
0.0045555 Eth
$133,634.00
11,426.258 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0787%
55
BYDFi
LINK-USDC$11.73
0.0045637 Eth
$127,527.00
10,873.180 LINK
0.0749%
56
Bitci TR
LINK-TRY$11.80
0.0045971 Eth
$116,956.00
9,699.520 LINK
0.0668%
57
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.70
0.0045625 Eth
$111,871.00
9,489.553 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0654%
58
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.71
0.0045648 Eth
$93,814.00
8,157.502 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0562%
59
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.80
0.0045927 Eth
$80,935.00
82,171.370 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5660%
60
WhiteBIT
LINK-TRY$11.73
0.0045609 Eth
$74,656.00
6,363.200 LINK
0.0438%
61
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.75
0.0045786 Eth
$73,368.00
6,133.885 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0423%
62
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.69
0.0045557 Eth
$72,198.00
73,685.614 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5076%
63
Slex
LINK-BTC$11.78
0.0045753 Eth
$69,939.00
5,874.500 LINK
0.0405%
64
Slex
LINK-ETH$11.77
0.0045718 Eth
$64,227.00
5,431.060 LINK
0.0374%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.77
0.0045835 Eth
$58,587.00
4,950.810 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0341%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.78
0.0045856 Eth
$50,999.00
4,278.722 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0295%
67
OKX
LINK-USDC$11.74
0.0045719 Eth
$47,011.00
3,932.719 LINK
0.0271%
68
BTCMarkets
LINK-AUD$11.78
0.0045797 Eth
$44,335.00
3,763.220 LINK
0.0259%
69
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.76
0.0045787 Eth
$33,498.00
2,816.800 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0194%
70
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.72
0.0045566 Eth
$31,876.00
32,599.589 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2246%
71
Foxbit
LINK-BRL$11.79
0.0045915 Eth
$31,567.00
2,645.790 LINK
0.0182%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.77
0.0045798 Eth
$26,588.00
2,217.510 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0153%
73
Mercado Bitcoin
LINK-BRL$11.79
0.0045894 Eth
$26,232.00
2,225.136 LINK
0.0153%
74
Bitso
LINK-USD$11.81
0.0046015 Eth
$24,410.00
2,067.232 LINK
0.0142%
75
Binance US
LINK-USDT$11.81
0.0045921 Eth
$23,743.00
2,009.903 LINK
0.0138%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.76
0.0045737 Eth
$18,034.36
1,532.282 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0106%
77
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.76
0.0045854 Eth
$16,104.81
1,368.820 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0094%
78
KuCoin
LINK-KCS$11.78
0.0045902 Eth
$14,784.14
1,255.443 LINK
0.0086%
79
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.75
0.0045818 Eth
$14,056.56
1,192.232 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0082%
80
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.74
0.0045760 Eth
$12,579.46
1,076.773 0X5947BB275C521040051D82396192181B413227A3
0.0074%
81
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X68F180FCCE6836688E9084F035309E29BF0A2095$11.81
0.0046015 Eth
$11,880.69
1,044.641 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0072%
82
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.75
0.0045724 Eth
$10,408.37
17.021 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.74
0.0045642 Eth
$8,319.97
702.296 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0048%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.76
0.0045793 Eth
$8,068.15
8,165.671 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0562%
85
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.81
0.0045902 Eth
$5,996.51
497.483 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0034%
86
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.74
0.0045778 Eth
$5,710.82
511.186 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0035%
87
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.73
0.0045599 Eth
$5,698.21
484.641 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0033%
88
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.66
0.0045399 Eth
$5,634.22
483.171 0X5947BB275C521040051D82396192181B413227A3
0.0033%
89
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$11.59
0.0045213 Eth
$4,970.26
429.028 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0030%
90
CoinEx
LINK-USDC$11.76
0.0045658 Eth
$4,499.65
373.897 LINK
0.0026%
91
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$11.76
0.0045855 Eth
$4,270.09
4,184.998 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0288%
92
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.77
0.0045864 Eth
$3,817.61
331.353 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0023%
93
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$11.54
0.0044986 Eth
$3,183.52
437.220 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0030%
94
Korbit
LINK-KRW$11.78
0.0045900 Eth
$3,087.15
257.903 LINK
0.0018%
95
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.72
0.0045556 Eth
$2,564.82
215.664 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0015%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$11.79
0.0045890 Eth
$2,429.52
203.243 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0014%
97
CoinEx
LINK-BTC$11.77
0.0045704 Eth
$2,161.01
182.035 LINK
0.0013%
98
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.73
0.0045621 Eth
$2,153.40
182.851 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0013%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$11.75
0.0045668 Eth
$807.02
67.482 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
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100
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0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.72
0.0045555 Eth
$702.06
59.484 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
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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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