ETH Price: $3,337.67 (-0.06%)
Gas: 5.86 Gwei
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

730,695 ( 0.044%)

Market

Price

$26.03 @ 0.007799 ETH (+3.15%)

Onchain Market Cap

$26,030,000,000.00

Circulating Supply Market Cap

$16,620,878,525.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
505.86983 LINK

Value
$13,167.79 ( ~3.9452 Eth) [0.0001%]
0xca2bb0263bd8f7ef35aecf4ed8a16d9c2da793db
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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 23563.64% |ETH 0.0003846 1927.82%

Market

Volume (24H):$572,164,974.00
Market Capitalization:$16,620,878,525.00
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
Binance
LINK-USDT$26.02
0.0077936 Eth
$66,301,153.00
2,605,336.730 LINK
22.3455%
2
Coinbase Exchange
LINK-USD$26.05
0.0078042 Eth
$37,241,902.00
1,429,686.420 LINK
12.2621%
3
Bybit
LINK-USDT$26.06
0.0078065 Eth
$28,552,601.00
1,120,866.572 LINK
9.6135%
4
Slex
LINK-USDT$26.05
0.0078071 Eth
$25,256,373.00
995,544.040 LINK
8.5386%
5
HTX
LINK-USDT$26.03
0.0077998 Eth
$13,001,811.00
512,635.502 LINK
4.3968%
6
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$26.13
0.0078284 Eth
$11,503,148.00
450,904.754 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.8673%
7
OKX
LINK-USDT$26.04
0.0078030 Eth
$11,221,567.00
440,879.646 LINK
3.7813%
8
KuCoin
LINK-USDT$26.04
0.0078007 Eth
$6,752,440.00
259,337.751 LINK
2.2243%
9
XT.COM
LINK-USDT$26.03
0.0077966 Eth
$6,619,834.00
260,146.590 LINK
2.2312%
10
Azbit
LINK-USDT$26.01
0.0077910 Eth
$6,609,984.00
259,749.273 LINK
2.2278%
11
Coinstore
LINK-USDT$25.98
0.0077825 Eth
$6,366,845.00
250,410.770 LINK
2.1477%
12
Bitunix
LINK-USDT$26.03
0.0077942 Eth
$5,604,267.00
215,340.980 LINK
1.8469%
13
CoinW
LINK-USDT$26.06
0.0078067 Eth
$4,290,138.00
164,651.010 LINK
1.4122%
14
Coinbase Exchange
LINK-EUR$26.06
0.0078049 Eth
$3,824,133.00
146,725.450 LINK
1.2584%
15
BYDFi
LINK-USDT$25.99
0.0077847 Eth
$3,782,136.00
145,529.680 LINK
1.2482%
16
Kraken
LINK-USD$26.07
0.0078113 Eth
$3,676,099.00
141,020.373 LINK
1.2095%
17
Bitvavo
LINK-EUR$26.08
0.0078132 Eth
$3,379,762.00
129,600.294 LINK
1.1116%
18
FMCPAY
LINK-USDT$26.03
0.0077943 Eth
$3,342,925.00
131,242.508 LINK
1.1256%
19
LBank
LINK-USDT$26.00
0.0077844 Eth
$3,325,333.00
127,920.570 LINK
1.0971%
20
LATOKEN
LINK-USDT$25.98
0.0077811 Eth
$3,178,966.00
122,377.107 LINK
1.0496%
21
QMall
LINK-USDT$26.05
0.0078033 Eth
$2,707,104.00
106,371.516 LINK
0.9123%
22
Bitstamp
LINK-USD$26.04
0.0078017 Eth
$2,198,829.00
84,440.436 LINK
0.7242%
23
Dex-Trade
LINK-USDT$26.05
0.0078028 Eth
$2,169,256.00
83,258.146 LINK
0.7141%
24
Hotcoin
LINK-USDT$26.05
0.0077991 Eth
$2,048,548.00
78,652.420 LINK
0.6746%
25
Bitstamp
LINK-EUR$26.03
0.0078000 Eth
$1,777,033.00
68,257.484 LINK
0.5854%
26
FMCPAY
LINK-ETH$26.05
0.0077998 Eth
$1,739,931.00
68,251.040 LINK
0.5854%
27
CoinEx
LINK-USDT$25.99
0.0077828 Eth
$1,690,587.00
66,191.450 LINK
0.5677%
28
Coinbase Exchange
LINK-GBP$25.99
0.0077839 Eth
$1,653,504.00
63,614.060 LINK
0.5456%
29
OKX
LINK-USDC$26.06
0.0078078 Eth
$1,538,938.00
60,341.889 LINK
0.5175%
30
FMCPAY
LINK-BTC$26.04
0.0078023 Eth
$1,514,793.00
59,431.900 LINK
0.5097%
31
PointPay
LINK-USDT$26.04
0.0078003 Eth
$1,050,611.00
41,291.974 LINK
0.3542%
32
WhiteBIT
LINK-TRY$26.08
0.0078116 Eth
$936,536.00
35,905.380 LINK
0.3080%
33
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$26.01
0.0077878 Eth
$815,988.00
31,992.076 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2744%
34
Bitbank
LINK-JPY$25.95
0.0077706 Eth
$746,022.00
28,749.423 LINK
0.2466%
35
EXMO
LINK-USDT$26.05
0.0078017 Eth
$742,922.00
28,518.015 LINK
0.2446%
36
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$25.98
0.0077806 Eth
$547,813.00
21,523.199 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1846%
37
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.98
0.0077810 Eth
$529,134.00
20,589.875 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1766%
38
EarnBIT
LINK-USDT$25.99
0.0077832 Eth
$521,208.00
20,469.715 LINK
0.1756%
39
Coinbase Exchange
LINK-USDT$26.04
0.0077973 Eth
$513,463.00
19,718.639 LINK
0.1691%
40
Gemini
LINK-USD$26.05
0.0078037 Eth
$460,791.00
17,690.970 LINK
0.1517%
41
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$25.99
0.0077830 Eth
$455,843.00
17,971.808 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1541%
42
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.98
0.0077786 Eth
$451,235.00
17,673.053 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1516%
43
WhiteBIT
LINK-BTC$26.10
0.0078157 Eth
$442,234.00
16,945.780 LINK
0.1453%
44
WhiteBIT
LINK-EUR$26.04
0.0077985 Eth
$402,437.00
15,454.850 LINK
0.1326%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$26.01
0.0077878 Eth
$351,910.00
13,818.959 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1185%
46
BigONE
LINK-USDT$25.99
0.0077861 Eth
$349,991.00
13,467.210 LINK
0.1155%
47
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$26.01
0.0077878 Eth
$336,993.00
328,913.312 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.8210%
48
QMall
LINK-USDC$26.05
0.0078057 Eth
$330,039.00
12,913.698 LINK
0.1108%
49
BitMart
LINK-BTC$26.01
0.0077906 Eth
$305,776.00
11,753.940 LINK
0.1008%
50
Coinbase Exchange
LINK-BTC$26.03
0.0077934 Eth
$291,609.00
11,204.710 LINK
0.0961%
51
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$26.00
0.0077884 Eth
$282,944.00
22,681.815 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1945%
52
Slex
LINK-ETH$26.03
0.0077951 Eth
$273,848.00
10,731.170 LINK
0.0920%
53
LATOKEN
LINK-BTC$26.03
0.0077939 Eth
$271,569.00
10,433.688 LINK
0.0895%
54
BitStorage
LINK-ETH$26.05
0.0078012 Eth
$260,373.00
9,995.410 LINK
0.0857%
55
HashKey Exchange
LINK-USD$26.02
0.0077942 Eth
$252,448.00
9,884.490 LINK
0.0848%
56
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$25.97
0.0077778 Eth
$215,902.00
8,497.867 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0729%
57
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$26.09
0.0078150 Eth
$180,911.00
7,104.981 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0609%
58
GMO Japan
LINK-JPY$26.15
0.0078359 Eth
$168,990.00
6,461.200 LINK
0.0554%
59
bitcastle
LINK-USDT$26.01
0.0077923 Eth
$151,724.00
5,969.930 LINK
0.0512%
60
Bitso
LINK-USD$26.02
0.0077932 Eth
$145,835.00
5,604.224 LINK
0.0481%
61
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$26.02
0.0077964 Eth
$117,892.00
4,631.486 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0397%
62
BitMart
LINK-ETH$26.04
0.0077974 Eth
$98,430.00
3,780.320 LINK
0.0324%
63
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$25.99
0.0077821 Eth
$94,654.00
3,702.993 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0318%
64
Mercado Bitcoin
LINK-BRL$26.19
0.0078452 Eth
$93,811.00
3,582.541 LINK
0.0307%
65
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$25.99
0.0077829 Eth
$88,291.00
86,252.614 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.7398%
66
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$26.10
0.0078166 Eth
$81,706.00
3,190.639 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0274%
67
Hotcoin
LINK-BTC$26.03
0.0077998 Eth
$71,600.00
2,750.820 LINK
0.0236%
68
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$26.01
0.0077883 Eth
$68,547.00
2,687.618 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0231%
69
EXMO
LINK-BTC$26.07
0.0078089 Eth
$60,259.00
2,310.993 LINK
0.0198%
70
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$26.12
0.0078255 Eth
$54,191.00
52,735.593 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4523%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.96
0.0077743 Eth
$41,154.00
1,600.086 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0137%
72
Dex-Trade
LINK-ETH$26.17
0.0078378 Eth
$34,103.00
1,303.050 LINK
0.0112%
73
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$26.09
0.0078139 Eth
$33,798.00
1,316.765 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0113%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$26.00
0.0077861 Eth
$33,094.00
1,300.419 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0112%
75
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$25.84
0.0077373 Eth
$27,159.00
2,201.516 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0189%
76
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$26.10
0.0078197 Eth
$25,911.00
1,014.252 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0087%
77
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$26.01
0.0077878 Eth
$23,168.00
910.814 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0078%
78
Hotcoin
LINK-ETH$26.05
0.0078008 Eth
$19,842.37
761.690 LINK
0.0065%
79
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$26.04
0.0077982 Eth
$18,832.54
739.546 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0063%
80
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$26.08
0.0078113 Eth
$16,469.24
21.352 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
81
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$26.06
0.0078044 Eth
$14,108.70
548.923 0X5947BB275C521040051D82396192181B413227A3
0.0047%
82
Bitexen
LINK-TRY$25.88
0.0077523 Eth
$12,332.95
476.530 LINK
0.0041%
83
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$26.04
0.0077971 Eth
$11,760.61
457.367 0X5947BB275C521040051D82396192181B413227A3
0.0039%
84
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$26.02
0.0077923 Eth
$11,580.10
455.236 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0039%
85
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$25.99
0.0077843 Eth
$9,054.32
26.760 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0002%
86
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$26.04
0.0077972 Eth
$8,731.56
339.631 0X5947BB275C521040051D82396192181B413227A3
0.0029%
87
Gemini
LINK-BTC$26.04
0.0078010 Eth
$7,340.29
281.910 LINK
0.0024%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$26.08
0.0078122 Eth
$4,716.32
182.995 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0016%
89
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$26.07
0.0078101 Eth
$4,414.88
4,296.661 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0369%
90
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$26.01
0.0077897 Eth
$4,264.08
12.721 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
91
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$26.04
0.0077991 Eth
$3,207.09
125.648 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0011%
92
CoinEx
LINK-BTC$26.09
0.0078112 Eth
$2,753.06
108.282 LINK
0.0009%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$26.14
0.0078329 Eth
$2,531.39
99.054 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0008%
94
CoinEx
LINK-USDC$26.07
0.0078072 Eth
$2,316.43
91.287 LINK
0.0008%
95
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$26.13
0.0078251 Eth
$2,149.71
2,115.572 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0181%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$26.09
0.0078142 Eth
$2,004.74
78.951 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0007%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$26.08
0.0078122 Eth
$1,471.09
57.724 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC3C7D422809852031B44AB29EEC9F1EFF2A58756$26.03
0.0077978 Eth
$1,457.16
53.692 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
99
Lydia Finance
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$25.91
0.0077594 Eth
$1,448.28
56.238 0X5947BB275C521040051D82396192181B413227A3
0.0005%
100
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$26.03
0.0077950 Eth
$1,163.28
44.531 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0004%

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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