ETH Price: $3,645.18 (+0.72%)
Gas: 7.61 Gwei
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,710 ( -0.003%)

Market

Price

$23.52 @ 0.006452 ETH (+1.13%)

Onchain Market Cap

$23,520,000,000.00

Circulating Supply Market Cap

$14,850,904,875.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
370.396237671085198 LINK

Value
$8,711.72 ( ~2.3899 Eth) [0.0000%]
0xff6709c4aFcf04f10731bfAb00b7835eCFb6275A
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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 21281.82% |ETH 0.0003846 1577.59%

Market

Volume (24H):$846,894,858.00
Market Capitalization:$14,850,904,875.00
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$23.49
0.0064343 Eth
$33,063,454.00
1,407,374.720 LINK
11.2386%
2
WhiteBIT
LINK-USDT$23.52
0.0064397 Eth
$26,560,954.00
1,129,511.850 LINK
9.0197%
3
Bybit
LINK-USDT$23.48
0.0064397 Eth
$20,070,942.00
853,747.747 LINK
6.8176%
4
MEXC
LINK-USDT$23.52
0.0064413 Eth
$18,335,199.00
779,509.770 LINK
6.2248%
5
P2B
LINK-USDT$23.53
0.0064424 Eth
$17,808,726.00
756,995.860 LINK
6.0450%
6
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.49
0.0064386 Eth
$16,568,011.00
703,679.448 0X514910771AF9CA656AF840DFF83E8264ECF986CA
5.6192%
7
CoinW
LINK-USDT$23.48
0.0064360 Eth
$15,114,228.00
643,724.830 LINK
5.1405%
8
OKX
LINK-USDT$23.48
0.0064390 Eth
$13,945,836.00
592,309.622 LINK
4.7299%
9
DigiFinex
LINK-USDT$23.48
0.0064390 Eth
$10,851,821.00
462,146.880 LINK
3.6905%
10
XT.COM
LINK-USDT$23.53
0.0064441 Eth
$8,362,225.00
355,382.970 LINK
2.8379%
11
Azbit
LINK-USDT$23.53
0.0064448 Eth
$8,352,452.00
355,006.625 LINK
2.8349%
12
HTX
LINK-USDT$23.49
0.0064418 Eth
$7,877,652.00
336,021.779 LINK
2.6833%
13
Coinstore
LINK-USDT$23.45
0.0064236 Eth
$7,694,669.00
327,163.760 LINK
2.6126%
14
BYDFi
LINK-USDT$23.53
0.0064368 Eth
$5,526,322.00
234,840.060 LINK
1.8753%
15
Biconomy.com
LINK-USDT$23.48
0.0064400 Eth
$5,420,307.00
231,707.970 LINK
1.8503%
16
Bithumb
LINK-KRW$23.66
0.0064853 Eth
$4,995,578.00
211,148.829 LINK
1.6861%
17
LBank
LINK-USDT$23.60
0.0064516 Eth
$4,230,141.00
179,277.320 LINK
1.4316%
18
LATOKEN
LINK-USDT$23.54
0.0064330 Eth
$4,128,539.00
175,383.414 LINK
1.4005%
19
Hotcoin
LINK-USDT$23.59
0.0064592 Eth
$3,160,596.00
133,977.250 LINK
1.0699%
20
Kraken
LINK-USD$23.48
0.0064385 Eth
$2,971,878.00
126,566.227 LINK
1.0107%
21
Dex-Trade
LINK-USDT$23.53
0.0064424 Eth
$2,696,229.00
114,608.670 LINK
0.9152%
22
KuCoin
LINK-USDT$23.48
0.0064377 Eth
$2,348,659.00
100,042.322 LINK
0.7989%
23
CoinEx
LINK-USDT$23.50
0.0064378 Eth
$2,268,947.00
96,582.771 LINK
0.7713%
24
Bitvavo
LINK-EUR$23.53
0.0064478 Eth
$2,183,176.00
92,774.533 LINK
0.7409%
25
Dcoin
LINK-USDT$23.47
0.0064364 Eth
$2,080,974.00
88,658.000 LINK
0.7080%
26
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.52
0.0064407 Eth
$1,963,995.00
83,480.843 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.6666%
27
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.50
0.0064351 Eth
$1,726,818.00
73,388.943 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5860%
28
Coinbase Exchange
LINK-EUR$23.50
0.0064445 Eth
$1,367,150.00
58,170.290 LINK
0.4645%
29
PointPay
LINK-USDT$23.52
0.0064405 Eth
$1,274,527.00
54,193.647 LINK
0.4328%
30
EXMO
LINK-USDT$23.50
0.0064445 Eth
$1,207,302.00
51,371.822 LINK
0.4102%
31
Bybit
LINK-USDC$23.47
0.0064359 Eth
$1,158,599.00
49,179.567 LINK
0.3927%
32
tanX
LINK-USDC$23.49
0.0064403 Eth
$1,155,504.00
49,270.270 LINK
0.3934%
33
WhiteBIT
LINK-BTC$23.52
0.0064408 Eth
$1,123,959.00
47,786.890 LINK
0.3816%
34
Gemini
LINK-USD$23.50
0.0064441 Eth
$1,099,541.00
46,788.975 LINK
0.3736%
35
WhiteBIT
LINK-TRY$23.53
0.0064434 Eth
$989,973.00
42,074.350 LINK
0.3360%
36
Phemex
LINK-USDT$23.50
0.0064392 Eth
$904,086.00
38,467.790 LINK
0.3072%
37
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.56
0.0064591 Eth
$803,074.00
52,735.716 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.4211%
38
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.52
0.0064431 Eth
$730,140.00
30,971.084 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2473%
39
EarnBIT
LINK-USDT$23.49
0.0064350 Eth
$676,165.00
28,750.543 LINK
0.2296%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.53
0.0064467 Eth
$633,585.00
26,800.673 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2140%
41
Bitstamp
LINK-EUR$23.52
0.0064505 Eth
$605,523.00
25,741.528 LINK
0.2056%
42
Bitbank
LINK-JPY$23.62
0.0064741 Eth
$602,486.00
25,511.113 LINK
0.2037%
43
BigONE
LINK-USDT$23.55
0.0064415 Eth
$540,259.00
22,937.240 LINK
0.1832%
44
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.51
0.0064390 Eth
$537,680.00
535,731.203 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
4.2781%
45
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.49
0.0064386 Eth
$525,133.00
22,157.540 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.1769%
46
Bitstamp
LINK-USD$23.53
0.0064524 Eth
$513,789.00
21,835.486 LINK
0.1744%
47
Bitbegin
LINK-USDT$23.52
0.0064438 Eth
$476,608.00
20,328.492 LINK
0.1623%
48
HashKey Exchange
LINK-USD$23.52
0.0064428 Eth
$445,589.00
19,009.551 LINK
0.1518%
49
Coinbase Exchange
LINK-GBP$23.52
0.0064500 Eth
$379,247.00
16,122.600 LINK
0.1287%
50
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.52
0.0064431 Eth
$345,593.00
345,546.351 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.7594%
51
OKX
LINK-USDC$23.46
0.0064332 Eth
$330,208.00
14,042.370 LINK
0.1121%
52
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.66
0.0064795 Eth
$313,519.00
13,339.340 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1065%
53
Coinbase Exchange
LINK-ETH$23.50
0.0064421 Eth
$300,219.00
12,774.450 LINK
0.1020%
54
GMO Japan
LINK-JPY$23.60
0.0064701 Eth
$264,187.00
11,193.300 LINK
0.0894%
55
BitMart
LINK-BTC$23.49
0.0064405 Eth
$257,274.00
10,950.580 LINK
0.0874%
56
Slex
LINK-ETH$23.54
0.0064450 Eth
$246,553.00
10,484.370 LINK
0.0837%
57
Bitci TR
LINK-TRY$23.75
0.0065100 Eth
$241,517.00
10,290.230 LINK
0.0822%
58
Coinone
LINK-KRW$23.67
0.0064896 Eth
$230,410.00
9,735.959 LINK
0.0777%
59
BitDelta
LINK-USDT$23.53
0.0064449 Eth
$222,160.00
9,481.000 LINK
0.0757%
60
Bitkub
LINK-THB$23.45
0.0064297 Eth
$172,405.00
7,352.888 LINK
0.0587%
61
LATOKEN
LINK-BTC$23.51
0.0064374 Eth
$138,135.00
5,876.305 LINK
0.0469%
62
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.54
0.0064465 Eth
$136,823.00
5,818.012 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0465%
63
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.54
0.0064352 Eth
$135,285.00
5,743.661 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0459%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.57
0.0064585 Eth
$127,126.00
5,394.280 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0431%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.51
0.0064417 Eth
$107,921.00
4,553.767 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0364%
66
Hotcoin
LINK-BTC$23.53
0.0064428 Eth
$105,025.00
4,463.910 LINK
0.0356%
67
Nonkyc.io
LINK-BTC$23.60
0.0064702 Eth
$99,321.00
4,194.299 LINK
0.0335%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.52
0.0064431 Eth
$98,821.00
4,208.864 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0336%
69
BitMart
LINK-ETH$23.50
0.0064420 Eth
$87,098.00
3,706.100 LINK
0.0296%
70
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.47
0.0064282 Eth
$84,557.00
3,600.350 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0288%
71
Bitso
LINK-USD$23.59
0.0064611 Eth
$78,230.00
3,315.617 LINK
0.0265%
72
EXMO
LINK-BTC$23.51
0.0064475 Eth
$73,547.00
3,128.041 LINK
0.0250%
73
Bitexen
LINK-TRY$23.28
0.0063806 Eth
$61,745.00
2,652.795 LINK
0.0212%
74
Binance US
LINK-USDT$23.50
0.0064424 Eth
$57,349.00
2,440.251 LINK
0.0195%
75
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.50
0.0064351 Eth
$51,997.00
51,827.181 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4139%
76
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.54
0.0064463 Eth
$48,662.00
2,054.343 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0164%
77
Hotcoin
LINK-ETH$23.54
0.0064457 Eth
$38,282.00
1,626.370 LINK
0.0130%
78
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$23.56
0.0064513 Eth
$38,189.00
49.124 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0004%
79
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.58
0.0064582 Eth
$30,831.00
1,360.726 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0109%
80
Korbit
LINK-KRW$23.78
0.0065196 Eth
$24,080.00
1,020.299 LINK
0.0081%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.52
0.0064431 Eth
$23,862.00
1,017.069 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0081%
82
Dex-Trade
LINK-ETH$23.48
0.0064364 Eth
$16,856.72
717.940 LINK
0.0057%
83
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.62
0.0064707 Eth
$15,905.76
753.875 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0060%
84
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.49
0.0064386 Eth
$15,277.35
657.399 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0052%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.49
0.0064410 Eth
$14,553.70
620.038 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0050%
86
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.46
0.0064238 Eth
$14,464.83
606.979 0X5947BB275C521040051D82396192181B413227A3
0.0048%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.55
0.0064533 Eth
$13,230.10
558.262 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0045%
88
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.50
0.0064359 Eth
$9,475.44
396.909 0X5947BB275C521040051D82396192181B413227A3
0.0032%
89
Biswap V3
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.52
0.0064420 Eth
$9,451.40
400.036 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0032%
90
KuCoin
LINK-KCS$23.38
0.0064123 Eth
$7,897.22
337.720 LINK
0.0027%
91
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.69
0.0064906 Eth
$7,190.80
306.313 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0024%
92
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.58
0.0064490 Eth
$6,702.40
6,678.810 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0533%
93
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.70
0.0064805 Eth
$5,944.67
5,871.170 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0469%
94
CoinEx
LINK-BTC$23.43
0.0064175 Eth
$4,480.81
189.622 LINK
0.0015%
95
Ace
LINK-USDT$23.50
0.0064397 Eth
$3,081.22
131.070 LINK
0.0010%
96
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.51
0.0064369 Eth
$2,480.34
7.169 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$23.70
0.0064941 Eth
$2,130.63
91.193 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0007%
98
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$23.51
0.0064459 Eth
$2,122.77
90.608 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0007%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.60
0.0064621 Eth
$1,237.98
52.549 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
100
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.42
0.0064230 Eth
$1,015.96
2.971 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0000%

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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