ETH Price: $3,668.10 (+0.86%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,726 ( 0.002%)

Market

Price

$23.92 @ 0.006521 ETH (+2.65%)

Onchain Market Cap

$23,920,000,000.00

Circulating Supply Market Cap

$15,071,343,283.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
761.59347958 LINK

Value
$18,217.32 ( ~4.9664 Eth) [0.0001%]
0xE658Ea616160C03e79ACF78a2bDA78775a146BBa
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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 21645.45% |ETH 0.0003846 1595.53%

Market

Volume (24H):$763,895,800.00
Market Capitalization:$15,071,343,283.00
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$23.93
0.0065174 Eth
$29,595,069.00
1,236,941.760 LINK
12.5426%
2
Slex
LINK-USDT$23.95
0.0065243 Eth
$24,045,413.00
1,029,232.300 LINK
10.4364%
3
Bitget
LINK-USDT$23.94
0.0065220 Eth
$20,507,363.00
877,220.166 LINK
8.8950%
4
Bybit
LINK-USDT$23.93
0.0065189 Eth
$18,153,206.00
776,037.431 LINK
7.8690%
5
P2B
LINK-USDT$23.96
0.0065264 Eth
$14,845,176.00
619,569.090 LINK
6.2824%
6
CoinW
LINK-USDT$23.95
0.0065257 Eth
$13,206,848.00
551,390.810 LINK
5.5911%
7
OKX
LINK-USDT$23.95
0.0065250 Eth
$11,517,848.00
491,917.090 LINK
4.9880%
8
HTX
LINK-USDT$23.91
0.0065148 Eth
$7,760,135.00
332,001.205 LINK
3.3665%
9
XT.COM
LINK-USDT$23.92
0.0065166 Eth
$7,142,234.00
305,186.650 LINK
3.0946%
10
Azbit
LINK-USDT$23.96
0.0065268 Eth
$7,107,650.00
303,810.836 LINK
3.0806%
11
Coinstore
LINK-USDT$23.84
0.0065012 Eth
$6,449,894.00
275,826.200 LINK
2.7969%
12
Biconomy.com
LINK-USDT$23.97
0.0065284 Eth
$6,000,709.00
256,826.870 LINK
2.6042%
13
Bithumb
LINK-KRW$23.98
0.0065323 Eth
$4,893,368.00
204,098.595 LINK
2.0696%
14
BYDFi
LINK-USDT$23.93
0.0065212 Eth
$4,695,181.00
196,213.790 LINK
1.9896%
15
BTSE
LINK-USDT$23.95
0.0065236 Eth
$3,562,772.00
148,758.136 LINK
1.5084%
16
LATOKEN
LINK-USDT$23.95
0.0065258 Eth
$3,466,084.00
144,737.694 LINK
1.4676%
17
Kraken
LINK-USD$23.95
0.0065226 Eth
$3,011,666.00
125,767.583 LINK
1.2753%
18
Hotcoin
LINK-USDT$23.84
0.0065100 Eth
$2,594,892.00
108,867.510 LINK
1.1039%
19
Dex-Trade
LINK-USDT$23.92
0.0065156 Eth
$2,339,013.00
97,782.760 LINK
0.9915%
20
Bitvavo
LINK-EUR$23.96
0.0065257 Eth
$2,110,042.00
88,072.556 LINK
0.8931%
21
Dcoin
LINK-USDT$23.99
0.0065346 Eth
$2,013,736.00
83,939.000 LINK
0.8511%
22
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.91
0.0065131 Eth
$2,013,434.00
85,215.827 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.8641%
23
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.93
0.0065181 Eth
$1,874,915.00
79,396.841 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.8051%
24
CoinEx
LINK-USDT$23.98
0.0065314 Eth
$1,711,341.00
73,356.584 LINK
0.7438%
25
KuCoin
LINK-USDT$23.94
0.0065208 Eth
$1,707,555.00
71,338.499 LINK
0.7234%
26
PointPay
LINK-USDT$23.95
0.0065246 Eth
$1,161,927.00
49,666.645 LINK
0.5036%
27
tanX
LINK-USDC$23.93
0.0065209 Eth
$1,160,929.00
49,632.670 LINK
0.5033%
28
Gemini
LINK-USD$23.97
0.0065289 Eth
$1,051,440.00
43,865.487 LINK
0.4448%
29
EXMO
LINK-USDT$23.95
0.0065243 Eth
$1,033,880.00
43,166.201 LINK
0.4377%
30
Bybit
LINK-USDC$23.96
0.0065256 Eth
$1,031,902.00
43,935.027 LINK
0.4455%
31
WhiteBIT
LINK-BTC$23.94
0.0065231 Eth
$950,919.00
39,724.700 LINK
0.4028%
32
Coinbase Exchange
LINK-EUR$23.91
0.0065154 Eth
$948,470.00
39,673.920 LINK
0.4023%
33
Trubit
LINK-USDT$23.88
0.0065041 Eth
$929,756.00
39,841.120 LINK
0.4040%
34
WhiteBIT
LINK-TRY$23.83
0.0065058 Eth
$901,397.00
37,832.870 LINK
0.3836%
35
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.95
0.0065246 Eth
$816,969.00
34,517.605 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3500%
36
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.93
0.0065179 Eth
$792,281.00
51,264.070 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.5198%
37
Bitstamp
LINK-EUR$23.96
0.0065275 Eth
$649,643.00
27,108.894 LINK
0.2749%
38
Bitbank
LINK-JPY$23.88
0.0065040 Eth
$609,765.00
25,538.002 LINK
0.2590%
39
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.93
0.0065190 Eth
$605,821.00
25,705.387 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.2607%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.91
0.0065143 Eth
$560,824.00
23,641.696 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2397%
41
EarnBIT
LINK-USDT$23.97
0.0065321 Eth
$557,911.00
23,821.826 LINK
0.2416%
42
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.84
0.0064945 Eth
$516,326.00
21,937.345 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.2224%
43
Bitstamp
LINK-USD$23.97
0.0065290 Eth
$475,454.00
19,835.397 LINK
0.2011%
44
BigONE
LINK-USDT$24.00
0.0065376 Eth
$458,243.00
19,092.350 LINK
0.1936%
45
Bitbegin
LINK-USDT$23.95
0.0065237 Eth
$451,670.00
19,329.515 LINK
0.1960%
46
Coinbase Exchange
LINK-GBP$23.94
0.0065259 Eth
$396,125.00
16,543.220 LINK
0.1677%
47
HashKey Exchange
LINK-USD$23.95
0.0065271 Eth
$373,101.00
15,967.203 LINK
0.1619%
48
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.96
0.0065276 Eth
$343,504.00
335,947.634 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.4065%
49
Coinbase Exchange
LINK-ETH$23.74
0.0064696 Eth
$325,094.00
13,694.740 LINK
0.1389%
50
WhiteBIT
LINK-EUR$23.93
0.0065211 Eth
$310,792.00
12,987.350 LINK
0.1317%
51
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.90
0.0065095 Eth
$307,155.00
13,110.798 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1329%
52
Coinbase Exchange
LINK-BTC$23.96
0.0065292 Eth
$296,943.00
12,390.740 LINK
0.1256%
53
Slex
LINK-ETH$23.94
0.0065216 Eth
$276,542.00
11,699.300 LINK
0.1186%
54
OKX
LINK-USDC$23.95
0.0065242 Eth
$274,239.00
11,723.817 LINK
0.1189%
55
GMO Japan
LINK-JPY$24.00
0.0065395 Eth
$273,524.00
11,397.900 LINK
0.1156%
56
BitMart
LINK-BTC$23.98
0.0065317 Eth
$267,354.00
11,150.520 LINK
0.1131%
57
Bitci TR
LINK-TRY$24.04
0.0065479 Eth
$240,062.00
10,255.290 LINK
0.1040%
58
Coinone
LINK-KRW$24.00
0.0065361 Eth
$187,793.00
7,826.041 LINK
0.0794%
59
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.87
0.0065016 Eth
$145,772.00
6,166.249 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0625%
60
LATOKEN
LINK-BTC$23.95
0.0065267 Eth
$122,765.00
5,126.565 LINK
0.0520%
61
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.93
0.0065195 Eth
$111,743.00
4,707.039 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0477%
62
Bitkub
LINK-THB$23.86
0.0064998 Eth
$105,471.00
4,420.180 LINK
0.0448%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.94
0.0065236 Eth
$105,007.00
4,437.418 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0450%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.95
0.0065246 Eth
$99,099.00
4,235.306 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0429%
65
Kanga
LINK-PLN$23.84
0.0065021 Eth
$92,829.00
0.000 LINK
0.0000%
66
BitMart
LINK-ETH$23.97
0.0065290 Eth
$87,807.00
3,663.680 LINK
0.0371%
67
Hotcoin
LINK-BTC$23.82
0.0065055 Eth
$87,105.00
3,656.970 LINK
0.0371%
68
Bitso
LINK-USD$23.91
0.0065138 Eth
$83,591.00
3,496.379 LINK
0.0355%
69
Nonkyc.io
LINK-BTC$23.89
0.0065160 Eth
$76,949.00
3,268.622 LINK
0.0331%
70
Gemini
LINK-BTC$23.77
0.0064758 Eth
$61,971.00
2,606.624 LINK
0.0264%
71
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.90
0.0065095 Eth
$59,982.00
58,713.013 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5953%
72
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.89
0.0065088 Eth
$57,034.00
2,415.267 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0245%
73
Binance US
LINK-USDT$23.95
0.0065233 Eth
$51,254.00
2,140.358 LINK
0.0217%
74
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$23.84
0.0064935 Eth
$37,926.00
48.154 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0005%
75
Bitexen
LINK-TRY$23.57
0.0064391 Eth
$32,654.00
1,385.265 LINK
0.0140%
76
Hotcoin
LINK-ETH$23.98
0.0065315 Eth
$31,661.00
1,320.460 LINK
0.0134%
77
CoinEx
LINK-USDC$23.87
0.0065024 Eth
$31,195.00
1,372.824 LINK
0.0139%
78
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.85
0.0064972 Eth
$28,165.00
1,242.484 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0126%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.95
0.0065266 Eth
$24,485.00
1,046.521 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0106%
80
Korbit
LINK-KRW$23.93
0.0065176 Eth
$21,174.00
905.630 LINK
0.0092%
81
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.93
0.0065179 Eth
$18,323.76
777.212 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0079%
82
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.75
0.0064708 Eth
$16,145.22
766.788 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0078%
83
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.92
0.0065175 Eth
$15,247.07
645.120 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0065%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.95
0.0065246 Eth
$14,613.01
618.272 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0063%
85
Dex-Trade
LINK-ETH$23.95
0.0065239 Eth
$13,332.58
556.660 LINK
0.0056%
86
KuCoin
LINK-KCS$23.93
0.0065188 Eth
$10,855.80
453.673 LINK
0.0046%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.86
0.0064988 Eth
$7,726.88
330.463 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0034%
88
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.90
0.0065132 Eth
$6,499.68
6,367.559 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0646%
89
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.86
0.0065022 Eth
$6,431.27
6,299.857 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0639%
90
Ace
LINK-USDT$23.94
0.0065211 Eth
$2,745.01
117.340 LINK
0.0012%
91
CoinEx
LINK-BTC$23.86
0.0065026 Eth
$2,405.98
101.972 LINK
0.0010%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$23.78
0.0064903 Eth
$2,360.05
101.106 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0010%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$23.91
0.0065121 Eth
$2,300.26
96.245 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0010%
94
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.89
0.0065077 Eth
$964.08
2.758 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0000%
95
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$23.88
0.0065094 Eth
$888.41
871.232 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0088%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$23.89
0.0065080 Eth
$742.71
31.682 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0003%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$23.76
0.0064836 Eth
$736.26
31.454 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC3C7D422809852031B44AB29EEC9F1EFF2A58756$23.75
0.0064710 Eth
$597.37
25.575 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$23.96
0.0065305 Eth
$555.64
23.232 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
100
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$23.89
0.0065075 Eth
$315.60
13.455 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
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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