ETH Price: $3,639.35 (-0.28%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,693 ( 0.037%)

Market

Price

$23.40 @ 0.006430 ETH (-0.99%)

Onchain Market Cap

$23,400,000,000.00

Circulating Supply Market Cap

$14,768,551,617.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xb5d22081cbf745de0dc513f748ab7ae53d33cd93
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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 21172.73% |ETH 0.0003846 1571.87%

Market

Volume (24H):$668,371,804.00
Market Capitalization:$14,768,551,617.00
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
Coinbase Exchange
LINK-USD$23.40
0.0064213 Eth
$24,609,802.00
1,051,745.900 LINK
10.2320%
2
Slex
LINK-USDT$23.46
0.0064368 Eth
$24,124,038.00
1,033,118.550 LINK
10.0507%
3
WhiteBIT
LINK-USDT$23.51
0.0064443 Eth
$19,852,347.00
844,350.130 LINK
8.2143%
4
Bybit
LINK-USDT$23.44
0.0064331 Eth
$16,281,169.00
697,616.927 LINK
6.7868%
5
MEXC
LINK-USDT$23.55
0.0064625 Eth
$15,198,914.00
645,278.440 LINK
6.2776%
6
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.43
0.0064342 Eth
$14,850,612.00
632,006.301 0X514910771AF9CA656AF840DFF83E8264ECF986CA
6.1485%
7
P2B
LINK-USDT$23.51
0.0064510 Eth
$12,092,514.00
514,307.420 LINK
5.0035%
8
CoinW
LINK-USDT$23.50
0.0064407 Eth
$10,938,531.00
465,531.900 LINK
4.5289%
9
OKX
LINK-USDT$23.46
0.0064373 Eth
$10,094,933.00
432,892.569 LINK
4.2114%
10
HTX
LINK-USDT$23.47
0.0064400 Eth
$7,262,319.00
311,166.406 LINK
3.0272%
11
Azbit
LINK-USDT$23.48
0.0064442 Eth
$5,997,142.00
257,237.243 LINK
2.5025%
12
XT.COM
LINK-USDT$23.52
0.0064462 Eth
$5,988,000.00
256,570.760 LINK
2.4961%
13
Binance
LINK-FDUSD$23.51
0.0064529 Eth
$5,658,272.00
241,604.270 LINK
2.3505%
14
Coinstore
LINK-USDT$23.46
0.0064365 Eth
$5,605,034.00
240,421.620 LINK
2.3390%
15
Bithumb
LINK-KRW$23.58
0.0064709 Eth
$4,564,770.00
193,579.780 LINK
1.8832%
16
BYDFi
LINK-USDT$23.52
0.0064538 Eth
$3,907,533.00
166,120.860 LINK
1.6161%
17
LATOKEN
LINK-USDT$23.52
0.0064457 Eth
$2,924,362.00
124,350.013 LINK
1.2097%
18
Hotcoin
LINK-USDT$23.47
0.0064387 Eth
$2,090,433.00
89,049.930 LINK
0.8663%
19
Bitvavo
LINK-EUR$23.49
0.0064466 Eth
$1,984,028.00
84,458.837 LINK
0.8217%
20
Dex-Trade
LINK-USDT$23.63
0.0064904 Eth
$1,908,823.00
80,772.480 LINK
0.7858%
21
Dcoin
LINK-USDT$23.51
0.0064606 Eth
$1,801,765.00
76,634.000 LINK
0.7455%
22
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.44
0.0064323 Eth
$1,706,038.00
72,696.903 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.7072%
23
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.51
0.0064511 Eth
$1,671,146.00
71,203.838 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.6927%
24
CoinEx
LINK-USDT$23.50
0.0064451 Eth
$1,669,945.00
71,674.995 LINK
0.6973%
25
KuCoin
LINK-USDT$23.46
0.0064383 Eth
$1,551,700.00
66,135.001 LINK
0.6434%
26
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.47
0.0064419 Eth
$1,497,789.00
63,886.963 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.6215%
27
tanX
LINK-USDC$23.46
0.0064390 Eth
$1,078,105.00
46,153.270 LINK
0.4490%
28
PointPay
LINK-USDT$23.46
0.0064389 Eth
$955,242.00
40,981.498 LINK
0.3987%
29
Coinbase Exchange
LINK-EUR$23.58
0.0064636 Eth
$890,032.00
37,740.850 LINK
0.3672%
30
EXMO
LINK-USDT$23.41
0.0064255 Eth
$865,808.00
36,977.786 LINK
0.3597%
31
AscendEX (BitMax)
LINK-BTC$23.38
0.0064195 Eth
$794,800.00
33,997.800 LINK
0.3307%
32
WhiteBIT
LINK-TRY$23.50
0.0064414 Eth
$736,765.00
31,349.480 LINK
0.3050%
33
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.53
0.0064570 Eth
$666,118.00
28,241.902 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2748%
34
WhiteBIT
LINK-BTC$23.50
0.0064411 Eth
$662,755.00
28,201.770 LINK
0.2744%
35
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.46
0.0064309 Eth
$659,907.00
28,426.166 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.2765%
36
Bitstamp
LINK-USD$23.45
0.0064353 Eth
$640,525.00
27,314.501 LINK
0.2657%
37
Gemini
LINK-USD$23.38
0.0064152 Eth
$624,855.00
26,729.752 LINK
0.2600%
38
Bitstamp
LINK-EUR$23.42
0.0064265 Eth
$623,744.00
26,635.277 LINK
0.2591%
39
Bybit
LINK-USDC$23.49
0.0064469 Eth
$555,688.00
23,818.706 LINK
0.2317%
40
Bitbank
LINK-JPY$23.49
0.0064448 Eth
$500,733.00
21,320.310 LINK
0.2074%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.53
0.0064570 Eth
$497,614.00
21,246.141 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2067%
42
BitStorage
LINK-USDT$23.57
0.0064675 Eth
$486,208.00
20,626.290 LINK
0.2007%
43
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.51
0.0064512 Eth
$478,559.00
475,398.801 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
4.6249%
44
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.43
0.0064350 Eth
$411,699.00
27,250.146 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2651%
45
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.40
0.0064207 Eth
$410,346.00
17,646.666 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1717%
46
Bitbegin
LINK-USDT$23.53
0.0064677 Eth
$407,701.00
17,463.897 LINK
0.1699%
47
Coinbase Exchange
LINK-GBP$23.56
0.0064578 Eth
$368,030.00
15,619.810 LINK
0.1520%
48
BigONE
LINK-USDT$23.51
0.0064545 Eth
$354,392.00
15,072.300 LINK
0.1466%
49
Coinbase Exchange
LINK-ETH$23.49
0.0064390 Eth
$336,453.00
14,321.270 LINK
0.1393%
50
Slex
LINK-ETH$23.50
0.0064502 Eth
$317,503.00
13,544.730 LINK
0.1318%
51
BitMart
LINK-BTC$23.52
0.0064515 Eth
$268,545.00
11,417.040 LINK
0.1111%
52
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.53
0.0064570 Eth
$248,059.00
246,299.862 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3961%
53
Bitci TR
LINK-TRY$23.28
0.0063814 Eth
$242,041.00
10,349.440 LINK
0.1007%
54
GMO Japan
LINK-JPY$23.52
0.0064536 Eth
$235,301.00
10,003.600 LINK
0.0973%
55
OKX
LINK-USDC$23.44
0.0064314 Eth
$228,423.00
9,792.352 LINK
0.0953%
56
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.57
0.0064689 Eth
$215,861.00
9,244.245 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0899%
57
Coinone
LINK-KRW$23.60
0.0064768 Eth
$167,348.00
7,090.645 LINK
0.0690%
58
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.54
0.0064556 Eth
$122,040.00
5,204.760 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0506%
59
LATOKEN
LINK-BTC$23.71
0.0065071 Eth
$108,232.00
4,564.500 LINK
0.0444%
60
Bitkub
LINK-THB$23.49
0.0064470 Eth
$103,899.00
4,424.066 LINK
0.0430%
61
BitStorage
LINK-ETH$23.51
0.0064538 Eth
$101,729.00
4,327.260 LINK
0.0421%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.50
0.0064493 Eth
$95,549.00
4,068.930 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0396%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.53
0.0064570 Eth
$93,127.00
3,977.283 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0387%
64
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.52
0.0064540 Eth
$79,241.00
3,375.133 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0328%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.53
0.0064570 Eth
$76,062.00
3,262.690 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0317%
66
Hotcoin
LINK-BTC$23.50
0.0064448 Eth
$67,348.00
2,866.240 LINK
0.0279%
67
EXMO
LINK-BTC$23.74
0.0065146 Eth
$62,967.00
2,652.515 LINK
0.0258%
68
Gemini
LINK-BTC$23.41
0.0064237 Eth
$58,755.00
2,510.087 LINK
0.0244%
69
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.44
0.0064323 Eth
$48,143.00
47,957.766 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4666%
70
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.44
0.0064323 Eth
$45,610.00
1,942.456 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0189%
71
Bitexen
LINK-TRY$23.25
0.0063806 Eth
$32,210.00
1,385.265 LINK
0.0135%
72
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$23.49
0.0064461 Eth
$30,892.00
39.784 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0004%
73
CoinEx
LINK-USDC$23.53
0.0064574 Eth
$29,200.00
1,285.821 LINK
0.0125%
74
Tokpie
LINK-USDT$23.64
0.0064915 Eth
$23,726.00
1,003.461 LINK
0.0098%
75
Hotcoin
LINK-ETH$23.48
0.0064420 Eth
$23,357.00
994.940 LINK
0.0097%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.56
0.0064667 Eth
$19,109.60
817.763 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0080%
77
Korbit
LINK-KRW$23.67
0.0064956 Eth
$16,190.54
695.445 LINK
0.0068%
78
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.52
0.0064548 Eth
$15,422.56
736.948 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0072%
79
Dex-Trade
LINK-ETH$23.53
0.0064532 Eth
$14,370.05
610.770 LINK
0.0059%
80
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.46
0.0064382 Eth
$14,302.39
609.633 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0059%
81
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.43
0.0064350 Eth
$14,199.75
606.890 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0059%
82
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.45
0.0064312 Eth
$12,453.44
532.410 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0052%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.53
0.0064570 Eth
$11,546.22
489.157 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0048%
84
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.59
0.0064748 Eth
$11,530.53
479.600 0X5947BB275C521040051D82396192181B413227A3
0.0047%
85
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.70
0.0065043 Eth
$10,832.20
453.147 0X5947BB275C521040051D82396192181B413227A3
0.0044%
86
KuCoin
LINK-KCS$23.42
0.0064277 Eth
$9,006.73
384.510 LINK
0.0037%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.61
0.0064789 Eth
$6,379.13
270.814 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0026%
88
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.54
0.0064532 Eth
$5,418.83
5,370.729 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0522%
89
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.55
0.0064585 Eth
$5,332.10
5,292.472 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0515%
90
CoinEx
LINK-BTC$23.48
0.0064352 Eth
$2,384.07
101.513 LINK
0.0010%
91
Ace
LINK-USDT$23.47
0.0064409 Eth
$2,361.69
101.240 LINK
0.0010%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$23.44
0.0064531 Eth
$2,043.05
88.386 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0009%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$23.39
0.0064202 Eth
$1,289.51
55.050 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.47
0.0064424 Eth
$887.53
37.791 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
95
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$23.61
0.0064811 Eth
$709.86
700.080 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0068%
96
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.46
0.0064300 Eth
$594.55
1.716 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0000%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$23.50
0.0064694 Eth
$547.93
23.412 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$23.46
0.0064358 Eth
$487.32
20.635 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.44
0.0064530 Eth
$362.80
15.558 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
100
Osmosis
IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049-UOSMO$23.70
0.0065182 Eth
$230.26
9.714 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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