ETH Price: $2,679.31 (-1.17%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

736,006 ( 0.036%)

Market

Price

$18.85 @ 0.007035 ETH (-0.76%)

Onchain Market Cap

$18,850,000,000.00

Circulating Supply Market Cap

$11,937,999,658.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Hotbit 7
Balance
1.72416777 LINK

Value
$32.50 ( ~0.0121299721310382 Eth) [0.0000%]
0x4A41D76B0524a3989998380c033f12bfEb5f7201
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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 17036.36% |ETH 0.0003846 1729.17%

Market

Volume (24H):$359,982,159.00
Market Capitalization:$11,937,999,658.00
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$18.93
0.0070629 Eth
$38,671,061.00
2,049,873.990 LINK
21.6275%
2
Bybit
LINK-USDT$18.88
0.0070459 Eth
$19,975,088.00
1,059,899.463 LINK
11.1826%
3
Coinbase Exchange
LINK-USD$18.89
0.0070462 Eth
$16,505,261.00
873,941.600 LINK
9.2206%
4
HTX
LINK-USDT$18.86
0.0070359 Eth
$15,974,230.00
846,158.874 LINK
8.9275%
5
P2B
LINK-USDT$18.91
0.0070546 Eth
$8,035,100.00
424,933.650 LINK
4.4833%
6
OKX
LINK-USDT$18.89
0.0070535 Eth
$5,074,217.00
269,783.942 LINK
2.8464%
7
BTSE
LINK-USDT$18.75
0.0070277 Eth
$3,880,220.00
206,948.340 LINK
2.1834%
8
XT.COM
LINK-USDT$18.91
0.0070557 Eth
$3,851,904.00
204,229.270 LINK
2.1547%
9
Gate.io
LINK-USDT$18.86
0.0070399 Eth
$3,831,368.00
203,269.660 LINK
2.1446%
10
WhiteBIT
LINK-USDT$18.85
0.0070396 Eth
$3,682,681.00
195,347.230 LINK
2.0610%
11
KuCoin
LINK-USDT$18.88
0.0070443 Eth
$3,433,349.00
181,864.513 LINK
1.9188%
12
Coinstore
LINK-USDT$18.93
0.0070624 Eth
$3,400,578.00
180,448.260 LINK
1.9038%
13
Kraken
LINK-USD$18.88
0.0070463 Eth
$3,213,886.00
170,192.220 LINK
1.7956%
14
CoinW
LINK-USDT$18.91
0.0070545 Eth
$2,928,953.00
154,897.520 LINK
1.6343%
15
Hotcoin
LINK-USDT$18.92
0.0070583 Eth
$2,492,583.00
131,749.770 LINK
1.3900%
16
Azbit
LINK-USDT$18.74
0.0070243 Eth
$2,346,752.00
124,359.593 LINK
1.3121%
17
BYDFi
LINK-USDT$18.74
0.0070250 Eth
$2,146,324.00
114,527.620 LINK
1.2083%
18
LATOKEN
LINK-USDT$18.91
0.0070550 Eth
$1,940,066.00
102,600.880 LINK
1.0825%
19
FMCPAY
LINK-USDT$18.90
0.0070513 Eth
$1,882,749.00
99,956.721 LINK
1.0546%
20
Bitvavo
LINK-EUR$18.92
0.0070591 Eth
$1,512,503.00
79,943.312 LINK
0.8435%
21
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.89
0.0070494 Eth
$1,509,184.00
80,101.161 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.8451%
22
QMall
LINK-USDT$18.91
0.0070551 Eth
$1,482,021.00
78,663.994 LINK
0.8300%
23
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.91
0.0070569 Eth
$1,303,115.00
69,171.574 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.7298%
24
Dex-Trade
LINK-USDT$18.86
0.0070371 Eth
$1,233,831.00
65,422.940 LINK
0.6903%
25
Biconomy.com
LINK-USDT$18.74
0.0070257 Eth
$1,222,639.00
64,785.240 LINK
0.6835%
26
FMCPAY
LINK-ETH$18.91
0.0070573 Eth
$1,180,311.00
62,617.120 LINK
0.6606%
27
CoinEx
LINK-USDT$18.92
0.0070577 Eth
$1,064,213.00
56,306.166 LINK
0.5941%
28
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.87
0.0070396 Eth
$1,031,573.00
54,792.343 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.5781%
29
FMCPAY
LINK-BTC$18.91
0.0070556 Eth
$954,080.00
50,784.300 LINK
0.5358%
30
Coinbase Exchange
LINK-EUR$18.87
0.0070414 Eth
$905,583.00
47,988.490 LINK
0.5063%
31
Trubit
LINK-USDT$18.90
0.0070508 Eth
$826,071.00
43,760.850 LINK
0.4617%
32
tanX
LINK-USDC$18.93
0.0070615 Eth
$747,042.00
39,600.090 LINK
0.4178%
33
Coinbase Exchange
LINK-GBP$18.89
0.0070471 Eth
$608,975.00
32,244.560 LINK
0.3402%
34
Bitbank
LINK-JPY$18.98
0.0070826 Eth
$606,828.00
31,966.931 LINK
0.3373%
35
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.94
0.0070655 Eth
$477,124.00
25,327.415 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2672%
36
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$18.94
0.0070655 Eth
$464,868.00
24,676.396 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2604%
37
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.94
0.0070688 Eth
$450,265.00
447,584.284 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
4.7223%
38
Bitbegin
LINK-USDT$18.73
0.0070189 Eth
$449,882.00
23,845.333 LINK
0.2516%
39
Phemex
LINK-USDT$18.86
0.0070527 Eth
$444,666.00
23,575.280 LINK
0.2487%
40
WhiteBIT
LINK-BTC$18.95
0.0070694 Eth
$391,050.00
20,639.490 LINK
0.2178%
41
BigONE
LINK-USDT$18.90
0.0070515 Eth
$361,764.00
19,140.170 LINK
0.2019%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.89
0.0070499 Eth
$328,173.00
17,418.816 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1838%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.90
0.0070538 Eth
$318,959.00
16,887.466 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1782%
44
Binance
LINK-TRY$18.97
0.0070770 Eth
$308,130.00
16,248.450 LINK
0.1714%
45
LATOKEN
LINK-BTC$18.92
0.0070604 Eth
$298,142.00
15,755.179 LINK
0.1662%
46
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.95
0.0070691 Eth
$273,247.00
28,044.599 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2959%
47
BitMart
LINK-BTC$18.91
0.0070545 Eth
$262,561.00
13,886.460 LINK
0.1465%
48
EXMO
LINK-USDT$18.89
0.0070487 Eth
$251,390.00
13,307.744 LINK
0.1404%
49
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.92
0.0070612 Eth
$236,664.00
12,563.867 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1326%
50
QMall
LINK-USDC$18.91
0.0070551 Eth
$214,256.00
11,366.442 LINK
0.1199%
51
Bitci TR
LINK-TRY$18.90
0.0070529 Eth
$197,255.00
10,386.670 LINK
0.1096%
52
BitDelta
LINK-USDT$18.90
0.0070507 Eth
$186,276.00
9,877.000 LINK
0.1042%
53
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.95
0.0070691 Eth
$176,592.00
9,364.423 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0988%
54
Gemini
LINK-USD$18.91
0.0070569 Eth
$148,523.00
7,855.449 LINK
0.0829%
55
GMO Japan
LINK-JPY$18.84
0.0070306 Eth
$142,268.00
7,549.700 LINK
0.0797%
56
CoinTR
LINK-TRY$18.95
0.0070703 Eth
$123,788.00
6,520.870 LINK
0.0688%
57
WhiteBIT
LINK-EUR$18.93
0.0070622 Eth
$102,763.00
5,429.300 LINK
0.0573%
58
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.91
0.0070567 Eth
$89,328.00
89,013.653 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.9391%
59
Hotcoin
LINK-BTC$18.88
0.0070460 Eth
$86,502.00
4,582.220 LINK
0.0483%
60
BYDFi
LINK-USDC$18.76
0.0070308 Eth
$78,122.00
4,164.340 LINK
0.0439%
61
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.91
0.0070569 Eth
$75,869.00
75,594.816 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.7976%
62
Coinbase Exchange
LINK-ETH$18.64
0.0069560 Eth
$69,061.00
3,704.610 LINK
0.0391%
63
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$18.93
0.0070629 Eth
$68,676.00
3,653.902 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0386%
64
BitMart
LINK-ETH$18.92
0.0070596 Eth
$66,705.00
3,525.420 LINK
0.0372%
65
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.90
0.0070555 Eth
$66,474.00
3,527.075 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0372%
66
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.84
0.0070275 Eth
$65,479.00
3,481.677 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0367%
67
Binance US
LINK-USDT$18.74
0.0070259 Eth
$54,110.00
2,886.630 LINK
0.0305%
68
KuCoin
LINK-USDC$18.90
0.0070510 Eth
$52,931.00
2,801.050 LINK
0.0296%
69
Bitso
LINK-USD$18.88
0.0070433 Eth
$52,444.00
2,777.952 LINK
0.0293%
70
Bitexen
LINK-TRY$18.82
0.0070235 Eth
$39,651.00
2,106.369 LINK
0.0222%
71
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.90
0.0070541 Eth
$39,430.00
2,092.255 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0221%
72
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$18.91
0.0070553 Eth
$32,740.00
1,737.894 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0183%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.93
0.0070641 Eth
$24,559.00
1,296.960 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0137%
74
Bitstamp
LINK-GBP$18.95
0.0070727 Eth
$23,486.00
1,239.444 LINK
0.0131%
75
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.87
0.0070410 Eth
$22,774.00
1,208.511 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0128%
76
EXMO
LINK-BTC$19.12
0.0071335 Eth
$22,659.00
1,185.222 LINK
0.0125%
77
Hotcoin
LINK-ETH$18.91
0.0070568 Eth
$21,552.00
1,139.500 LINK
0.0120%
78
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$18.85
0.0070327 Eth
$19,124.99
26.189 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0003%
79
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$18.89
0.0070505 Eth
$18,883.47
2,182.805 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0230%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$18.93
0.0070638 Eth
$16,398.16
870.695 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0092%
81
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.93
0.0070621 Eth
$16,393.90
16,305.205 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1720%
82
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.87
0.0070397 Eth
$11,855.65
629.356 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0066%
83
Dex-Trade
LINK-ETH$18.77
0.0070330 Eth
$10,311.01
549.210 LINK
0.0058%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$18.92
0.0070584 Eth
$8,183.82
435.659 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0046%
85
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.85
0.0070319 Eth
$7,289.80
383.954 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0041%
86
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.91
0.0070554 Eth
$6,836.10
26.902 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0003%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.87
0.0070388 Eth
$5,396.14
285.887 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0030%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD93F7E271CB87C23AAA73EDC008A79646D1F9912$18.62
0.0069502 Eth
$4,884.53
267.401 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0028%
89
Uniswap V4 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.66
0.0069626 Eth
$4,061.99
218.225 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0023%
90
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.00
0.0070901 Eth
$3,966.43
15.416 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0002%
91
CoinEx
LINK-BTC$18.83
0.0070250 Eth
$3,661.69
195.131 LINK
0.0021%
92
CoinEx
LINK-USDC$18.83
0.0070260 Eth
$3,396.75
179.992 LINK
0.0019%
93
Uniswap V4 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.66
0.0069782 Eth
$3,389.73
180.689 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0019%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$18.83
0.0070241 Eth
$3,035.44
160.224 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0017%
95
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XD036414FA2BCBB802691491E323BFF1348C5F4BA$18.77
0.0070177 Eth
$2,772.81
145.005 0X5947BB275C521040051D82396192181B413227A3
0.0015%
96
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.86
0.0070341 Eth
$2,699.02
2,695.950 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0284%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.89
0.0070505 Eth
$1,843.04
97.009 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0010%
98
Uniswap V4 (Polygon)
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$1,217.59
64.682 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0007%
99
Lydia Finance
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0.0070107 Eth
$990.88
52.548 0X5947BB275C521040051D82396192181B413227A3
0.0006%
100
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0.0069959 Eth
$771.72
40.992 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
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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