ETH Price: $3,622.94 (-0.10%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,586 ( 0.017%)

Market

Price

$23.14 @ 0.006387 ETH (-1.81%)

Onchain Market Cap

$23,140,000,000.00

Circulating Supply Market Cap

$14,602,011,793.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
100 LINK

Value
$2,314.00 ( ~0.638707747936362 Eth) [0.0000%]
0xe06a4e57e8f7181521735a30500c0bf04730f320
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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 20936.36% |ETH 0.0003846 1560.69%

Market

Volume (24H):$690,546,687.00
Market Capitalization:$14,602,011,793.00
Circulating Supply:631,099,972.00 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
Websea
LINK-USDT$23.22
0.0064149 Eth
$61,484,431.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$23.16
0.0063998 Eth
$60,870,114.00
2,604,665.530 LINK
17.4008%
3
Coinbase Exchange
LINK-USD$23.19
0.0064067 Eth
$27,770,279.00
1,197,510.970 LINK
8.0001%
4
Slex
LINK-USDT$23.20
0.0064103 Eth
$24,171,347.00
1,032,832.510 LINK
6.9000%
5
WhiteBIT
LINK-USDT$23.21
0.0064041 Eth
$20,031,070.00
862,920.290 LINK
5.7648%
6
Bybit
LINK-USDT$23.18
0.0063977 Eth
$17,015,307.00
727,681.245 LINK
4.8614%
7
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.15
0.0063953 Eth
$16,371,835.00
698,990.756 0X514910771AF9CA656AF840DFF83E8264ECF986CA
4.6697%
8
WEEX
LINK-USDT$23.20
0.0064023 Eth
$15,977,993.00
682,745.380 LINK
4.5612%
9
MEXC
LINK-USDT$23.20
0.0064074 Eth
$15,811,076.00
681,365.480 LINK
4.5519%
10
P2B
LINK-USDT$23.14
0.0063936 Eth
$12,115,162.00
523,623.940 LINK
3.4981%
11
CoinW
LINK-USDT$23.22
0.0064108 Eth
$10,832,674.00
466,516.170 LINK
3.1166%
12
OKX
LINK-USDT$23.16
0.0063920 Eth
$10,091,712.00
431,433.126 LINK
2.8822%
13
Gate.io
LINK-USDT$23.16
0.0063931 Eth
$9,077,856.00
388,920.840 LINK
2.5982%
14
BVOX
LINK-USDT$23.20
0.0064019 Eth
$8,800,468.00
375,818.700 LINK
2.5107%
15
HTX
LINK-USDT$23.17
0.0063930 Eth
$7,245,162.00
309,727.322 LINK
2.0692%
16
Deepcoin
LINK-USDT$23.17
0.0063950 Eth
$6,458,541.00
279,549.240 LINK
1.8676%
17
Biconomy.com
LINK-USDT$23.22
0.0064048 Eth
$6,129,972.00
261,873.550 LINK
1.7495%
18
XT.COM
LINK-USDT$23.20
0.0064074 Eth
$6,097,277.00
260,677.960 LINK
1.7415%
19
Azbit
LINK-USDT$23.18
0.0064067 Eth
$6,071,221.00
259,549.564 LINK
1.7340%
20
Coinstore
LINK-USDT$23.19
0.0064055 Eth
$5,630,418.00
240,671.180 LINK
1.6078%
21
Bithumb
LINK-KRW$23.29
0.0064266 Eth
$4,626,633.00
198,614.855 LINK
1.3269%
22
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.14
0.0063889 Eth
$3,929,601.00
168,563.278 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
1.1261%
23
BYDFi
LINK-USDT$23.16
0.0063996 Eth
$3,918,366.00
169,158.800 LINK
1.1301%
24
LATOKEN
LINK-USDT$23.11
0.0063866 Eth
$2,966,233.00
128,354.629 LINK
0.8575%
25
Dex-Trade
LINK-USDT$23.20
0.0064094 Eth
$1,946,427.00
83,880.710 LINK
0.5604%
26
Hotcoin
LINK-USDT$23.19
0.0063995 Eth
$1,944,959.00
83,852.860 LINK
0.5602%
27
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.16
0.0063935 Eth
$1,933,798.00
83,061.173 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5549%
28
Bitvavo
LINK-EUR$23.14
0.0063953 Eth
$1,879,452.00
81,226.093 LINK
0.5426%
29
Dcoin
LINK-USDT$23.18
0.0063984 Eth
$1,813,078.00
78,226.000 LINK
0.5226%
30
CoinEx
LINK-USDT$23.19
0.0063969 Eth
$1,809,589.00
77,260.808 LINK
0.5161%
31
KuCoin
LINK-USDT$23.19
0.0064008 Eth
$1,748,250.00
75,400.370 LINK
0.5037%
32
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.18
0.0063963 Eth
$1,091,247.00
46,815.997 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3128%
33
Coinbase Exchange
LINK-EUR$23.20
0.0064071 Eth
$1,055,406.00
45,484.500 LINK
0.3039%
34
PointPay
LINK-USDT$23.18
0.0064020 Eth
$960,735.00
41,096.220 LINK
0.2745%
35
tanX
LINK-USDC$23.17
0.0063976 Eth
$921,301.00
39,391.080 LINK
0.2632%
36
EXMO
LINK-USDT$23.18
0.0063955 Eth
$836,243.00
36,076.523 LINK
0.2410%
37
Bitstamp
LINK-USD$23.21
0.0064039 Eth
$783,883.00
33,773.485 LINK
0.2256%
38
WhiteBIT
LINK-TRY$23.22
0.0064220 Eth
$709,841.00
30,565.620 LINK
0.2042%
39
Bitstamp
LINK-EUR$23.17
0.0063936 Eth
$696,502.00
30,056.941 LINK
0.2008%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.13
0.0063855 Eth
$663,674.00
28,404.649 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1898%
41
WhiteBIT
LINK-BTC$23.22
0.0064081 Eth
$638,409.00
27,495.520 LINK
0.1837%
42
Gemini
LINK-USD$23.14
0.0063850 Eth
$636,795.00
27,517.666 LINK
0.1838%
43
Bitbank
LINK-JPY$23.20
0.0064153 Eth
$572,232.00
24,661.614 LINK
0.1648%
44
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.15
0.0063911 Eth
$547,828.00
23,751.839 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1587%
45
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.20
0.0064002 Eth
$465,887.00
470,265.049 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.1417%
46
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.13
0.0063891 Eth
$441,899.00
19,002.971 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1270%
47
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.15
0.0063953 Eth
$417,858.00
27,964.984 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1868%
48
Coinbase Exchange
LINK-GBP$23.17
0.0063972 Eth
$413,552.00
17,850.160 LINK
0.1193%
49
Bitbegin
LINK-USDT$23.18
0.0064059 Eth
$410,969.00
17,550.536 LINK
0.1172%
50
Slex
LINK-ETH$23.20
0.0064145 Eth
$372,840.00
15,991.890 LINK
0.1068%
51
BigONE
LINK-USDT$23.15
0.0063871 Eth
$328,125.00
14,174.280 LINK
0.0947%
52
Coinbase Exchange
LINK-ETH$23.23
0.0064134 Eth
$326,449.00
14,054.910 LINK
0.0939%
53
HashKey Exchange
LINK-USD$23.17
0.0063954 Eth
$308,714.00
13,251.566 LINK
0.0885%
54
BitMart
LINK-BTC$23.18
0.0063959 Eth
$262,842.00
11,338.320 LINK
0.0757%
55
Bitci TR
LINK-TRY$23.17
0.0063859 Eth
$242,184.00
10,333.480 LINK
0.0690%
56
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.09
0.0063755 Eth
$229,722.00
233,057.775 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.5570%
57
OKX
LINK-USDC$23.18
0.0063965 Eth
$223,744.00
9,582.521 LINK
0.0640%
58
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.16
0.0063939 Eth
$200,070.00
8,543.983 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0571%
59
Coinone
LINK-KRW$23.28
0.0064235 Eth
$173,607.00
7,457.081 LINK
0.0498%
60
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.13
0.0063831 Eth
$126,687.00
5,426.269 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0363%
61
Bitkub
LINK-THB$23.00
0.0063486 Eth
$124,590.00
5,417.613 LINK
0.0362%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.12
0.0063811 Eth
$120,375.00
5,220.700 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0349%
63
LATOKEN
LINK-BTC$23.20
0.0064137 Eth
$117,466.00
5,063.712 LINK
0.0338%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.20
0.0064049 Eth
$107,706.00
4,605.064 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0308%
65
BitMart
LINK-ETH$23.19
0.0063976 Eth
$85,416.00
3,683.400 LINK
0.0246%
66
Bitexen
LINK-TRY$23.03
0.0063649 Eth
$79,034.00
3,431.315 LINK
0.0229%
67
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.21
0.0064078 Eth
$76,202.00
3,262.174 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0218%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.10
0.0063779 Eth
$74,395.00
3,177.545 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0212%
69
Hotcoin
LINK-BTC$23.25
0.0064151 Eth
$63,276.00
2,720.970 LINK
0.0182%
70
Gemini
LINK-BTC$23.14
0.0063849 Eth
$58,212.00
2,515.525 LINK
0.0168%
71
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.16
0.0063883 Eth
$57,213.00
57,908.207 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3869%
72
Binance US
LINK-USDT$23.13
0.0063805 Eth
$53,439.00
2,310.837 LINK
0.0154%
73
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.16
0.0063899 Eth
$47,042.00
2,015.994 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0135%
74
CoinEx
LINK-USDC$23.24
0.0064190 Eth
$25,038.00
1,108.362 LINK
0.0074%
75
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$23.23
0.0064117 Eth
$22,927.00
29.996 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
76
Hotcoin
LINK-ETH$23.23
0.0064134 Eth
$21,833.00
939.920 LINK
0.0063%
77
Korbit
LINK-KRW$23.24
0.0064122 Eth
$19,378.37
828.634 LINK
0.0055%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.13
0.0063861 Eth
$19,339.93
826.510 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0055%
79
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.17
0.0064005 Eth
$16,049.97
769.496 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0051%
80
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.15
0.0063953 Eth
$15,208.62
650.473 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0043%
81
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.22
0.0064155 Eth
$14,580.60
624.575 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0042%
82
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.15
0.0063906 Eth
$13,836.12
593.807 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0040%
83
Dex-Trade
LINK-ETH$23.26
0.0064189 Eth
$12,564.88
540.240 LINK
0.0036%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.14
0.0063871 Eth
$11,341.88
486.026 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0032%
85
KuCoin
LINK-KCS$23.15
0.0063916 Eth
$9,955.63
429.995 LINK
0.0029%
86
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.25
0.0064188 Eth
$9,582.24
411.036 0X5947BB275C521040051D82396192181B413227A3
0.0027%
87
Biswap V3
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.17
0.0063976 Eth
$8,845.64
380.342 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0025%
88
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.15
0.0063919 Eth
$6,573.33
280.802 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0019%
89
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.16
0.0063978 Eth
$5,512.71
5,567.701 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0372%
90
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.20
0.0064098 Eth
$5,428.25
5,487.547 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0367%
91
CoinEx
LINK-BTC$23.21
0.0064081 Eth
$4,501.55
191.712 LINK
0.0013%
92
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.17
0.0064003 Eth
$3,488.04
149.483 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0010%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$23.16
0.0064018 Eth
$2,509.14
110.173 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0007%
94
Uniswap V3 (Arbitrum One)
0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.15
0.0063906 Eth
$2,323.25
440.396 0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8
0.0029%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.26
0.0064266 Eth
$1,098.05
46.963 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
96
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$22.98
0.0063433 Eth
$783.48
797.778 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0053%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$23.29
0.0064326 Eth
$561.17
23.875 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
98
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.16
0.0063978 Eth
$480.80
1.391 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0000%
99
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$23.34
0.0064408 Eth
$266.11
11.334 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0001%
100
Osmosis
IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049-UOSMO$23.25
0.0064145 Eth
$236.87
10.188 IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049
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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