ETH Price: $3,665.56 (+0.79%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,725 ( 0.002%)

Market

Price

$23.78 @ 0.006487 ETH (+2.07%)

Onchain Market Cap

$23,780,000,000.00

Circulating Supply Market Cap

$15,009,007,052.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x46b67d319a7233a6dc2c002d2e6e294e84d840af
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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 21518.18% |ETH 0.0003846 1586.69%

Market

Volume (24H):$758,475,236.00
Market Capitalization:$15,009,007,052.00
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$23.87
0.0065119 Eth
$28,918,295.00
1,211,643.470 LINK
11.6614%
2
Slex
LINK-USDT$23.86
0.0065101 Eth
$23,970,178.00
1,025,530.010 LINK
9.8702%
3
Bitget
LINK-USDT$23.88
0.0065129 Eth
$20,509,648.00
877,583.947 LINK
8.4463%
4
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.92
0.0065265 Eth
$18,141,365.00
765,375.129 0X514910771AF9CA656AF840DFF83E8264ECF986CA
7.3663%
5
Bybit
LINK-USDT$23.88
0.0065136 Eth
$17,893,079.00
765,315.048 LINK
7.3658%
6
P2B
LINK-USDT$23.82
0.0065013 Eth
$14,729,971.00
618,269.430 LINK
5.9505%
7
CoinW
LINK-USDT$23.87
0.0065105 Eth
$13,053,829.00
546,791.350 LINK
5.2626%
8
OKX
LINK-USDT$23.88
0.0065115 Eth
$11,272,874.00
481,725.291 LINK
4.6364%
9
HTX
LINK-USDT$23.88
0.0065122 Eth
$7,752,030.00
331,704.069 LINK
3.1925%
10
Azbit
LINK-USDT$23.76
0.0064792 Eth
$7,043,896.00
301,240.259 LINK
2.8993%
11
XT.COM
LINK-USDT$23.88
0.0065129 Eth
$7,043,633.00
301,007.220 LINK
2.8970%
12
Coinstore
LINK-USDT$23.78
0.0064949 Eth
$6,492,453.00
277,699.520 LINK
2.6727%
13
Bithumb
LINK-KRW$23.93
0.0065255 Eth
$4,845,196.00
202,437.736 LINK
1.9484%
14
BYDFi
LINK-USDT$23.92
0.0065286 Eth
$4,711,561.00
196,934.280 LINK
1.8954%
15
BTSE
LINK-USDT$23.87
0.0065150 Eth
$3,528,466.00
147,790.776 LINK
1.4224%
16
LATOKEN
LINK-USDT$23.92
0.0065208 Eth
$3,438,020.00
143,747.143 LINK
1.3835%
17
Kraken
LINK-USD$23.89
0.0065149 Eth
$3,002,980.00
125,706.509 LINK
1.2099%
18
Hotcoin
LINK-USDT$23.84
0.0065100 Eth
$2,594,892.00
108,867.510 LINK
1.0478%
19
Dex-Trade
LINK-USDT$23.79
0.0064985 Eth
$2,315,859.00
97,346.750 LINK
0.9369%
20
Bitvavo
LINK-EUR$23.76
0.0064817 Eth
$2,087,407.00
87,845.277 LINK
0.8455%
21
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.82
0.0064970 Eth
$2,060,177.00
87,345.021 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.8406%
22
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.78
0.0064842 Eth
$2,003,690.00
85,116.296 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.8192%
23
Dcoin
LINK-USDT$23.92
0.0065238 Eth
$1,998,802.00
83,550.000 LINK
0.8041%
24
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.87
0.0065096 Eth
$1,864,685.00
79,029.376 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.7606%
25
CoinEx
LINK-USDT$23.79
0.0064984 Eth
$1,722,972.00
73,888.788 LINK
0.7111%
26
KuCoin
LINK-USDT$23.93
0.0065248 Eth
$1,683,599.00
70,367.231 LINK
0.6772%
27
tanX
LINK-USDC$23.92
0.0065239 Eth
$1,176,800.00
50,200.340 LINK
0.4832%
28
PointPay
LINK-USDT$23.83
0.0065073 Eth
$1,141,301.00
48,798.449 LINK
0.4697%
29
Gemini
LINK-USD$23.89
0.0065140 Eth
$1,049,099.00
43,922.837 LINK
0.4227%
30
EXMO
LINK-USDT$23.88
0.0065127 Eth
$1,024,171.00
42,887.630 LINK
0.4128%
31
Bybit
LINK-USDC$23.90
0.0065194 Eth
$994,508.00
42,374.638 LINK
0.4078%
32
Coinbase Exchange
LINK-EUR$23.86
0.0065068 Eth
$944,914.00
39,600.630 LINK
0.3811%
33
WhiteBIT
LINK-BTC$23.89
0.0065138 Eth
$938,906.00
39,298.660 LINK
0.3782%
34
Trubit
LINK-USDT$23.86
0.0065137 Eth
$935,407.00
40,063.890 LINK
0.3856%
35
WhiteBIT
LINK-TRY$23.83
0.0065058 Eth
$901,397.00
37,832.870 LINK
0.3641%
36
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.84
0.0065077 Eth
$791,910.00
33,525.593 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3227%
37
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.68
0.0064607 Eth
$753,499.00
49,256.708 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.4741%
38
Bitstamp
LINK-EUR$23.85
0.0065047 Eth
$652,452.00
27,355.609 LINK
0.2633%
39
Bitbank
LINK-JPY$23.84
0.0065023 Eth
$608,007.00
25,499.979 LINK
0.2454%
40
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.68
0.0064607 Eth
$591,866.00
25,090.157 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.2415%
41
EarnBIT
LINK-USDT$23.86
0.0065109 Eth
$551,603.00
23,563.244 LINK
0.2268%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.81
0.0064994 Eth
$550,832.00
23,278.717 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2240%
43
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.82
0.0065019 Eth
$508,517.00
21,611.331 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.2080%
44
Bitstamp
LINK-USD$23.87
0.0065099 Eth
$473,441.00
19,834.138 LINK
0.1909%
45
Bitbegin
LINK-USDT$23.82
0.0064958 Eth
$448,289.00
19,187.892 LINK
0.1847%
46
BigONE
LINK-USDT$23.71
0.0064727 Eth
$441,641.00
18,629.780 LINK
0.1793%
47
Coinbase Exchange
LINK-GBP$23.89
0.0065148 Eth
$393,540.00
16,472.660 LINK
0.1585%
48
HashKey Exchange
LINK-USD$23.77
0.0064924 Eth
$366,032.00
15,674.712 LINK
0.1509%
49
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.84
0.0065065 Eth
$337,007.00
331,163.574 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.1873%
50
Coinbase Exchange
LINK-ETH$23.71
0.0064666 Eth
$324,754.00
13,694.740 LINK
0.1318%
51
WhiteBIT
LINK-EUR$23.83
0.0064971 Eth
$306,970.00
12,881.590 LINK
0.1240%
52
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.91
0.0065196 Eth
$305,347.00
13,022.195 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1253%
53
Coinbase Exchange
LINK-BTC$23.87
0.0065093 Eth
$294,728.00
12,347.700 LINK
0.1188%
54
Slex
LINK-ETH$23.86
0.0065084 Eth
$279,794.00
11,862.510 LINK
0.1142%
55
GMO Japan
LINK-JPY$23.83
0.0065093 Eth
$266,879.00
11,197.900 LINK
0.1078%
56
BitMart
LINK-BTC$23.83
0.0064990 Eth
$266,304.00
11,174.100 LINK
0.1075%
57
OKX
LINK-USDC$23.88
0.0065123 Eth
$261,350.00
11,183.868 LINK
0.1076%
58
Bitci TR
LINK-TRY$23.61
0.0064491 Eth
$239,891.00
10,249.650 LINK
0.0986%
59
BitDelta
LINK-USDT$23.77
0.0064850 Eth
$215,580.00
9,232.000 LINK
0.0889%
60
Coinone
LINK-KRW$23.87
0.0065089 Eth
$186,327.00
7,807.128 LINK
0.0751%
61
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.63
0.0064439 Eth
$143,926.00
6,110.231 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0588%
62
LATOKEN
LINK-BTC$23.79
0.0064994 Eth
$124,173.00
5,218.856 LINK
0.0502%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.84
0.0065078 Eth
$109,239.00
4,613.123 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0444%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.81
0.0064997 Eth
$103,445.00
4,382.061 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0422%
65
Bitkub
LINK-THB$23.65
0.0064607 Eth
$102,110.00
4,317.264 LINK
0.0416%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.86
0.0065123 Eth
$97,697.00
4,173.384 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0402%
67
Kanga
LINK-PLN$23.80
0.0065046 Eth
$90,783.00
0.000 LINK
0.0000%
68
BitMart
LINK-ETH$23.85
0.0065049 Eth
$87,395.00
3,663.740 LINK
0.0353%
69
Hotcoin
LINK-BTC$23.82
0.0065055 Eth
$87,105.00
3,656.970 LINK
0.0352%
70
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.72
0.0064683 Eth
$86,506.00
3,665.437 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0353%
71
Bitso
LINK-USD$23.83
0.0065010 Eth
$79,704.00
3,345.119 LINK
0.0322%
72
Nonkyc.io
LINK-BTC$23.89
0.0065160 Eth
$76,949.00
3,268.622 LINK
0.0315%
73
Gemini
LINK-BTC$23.74
0.0064753 Eth
$61,890.00
2,606.624 LINK
0.0251%
74
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.82
0.0064970 Eth
$58,788.00
57,702.333 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5554%
75
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.69
0.0064605 Eth
$56,356.00
2,389.397 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0230%
76
Binance US
LINK-USDT$23.75
0.0064807 Eth
$46,636.00
1,963.519 LINK
0.0189%
77
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$23.70
0.0064635 Eth
$37,388.00
47.736 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0005%
78
Bitexen
LINK-TRY$23.57
0.0064391 Eth
$32,654.00
1,385.265 LINK
0.0133%
79
CoinEx
LINK-USDC$23.71
0.0064680 Eth
$31,169.00
1,372.209 LINK
0.0132%
80
Hotcoin
LINK-ETH$23.76
0.0064833 Eth
$30,709.00
1,292.690 LINK
0.0124%
81
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.76
0.0064864 Eth
$27,470.00
1,214.774 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0117%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.84
0.0065073 Eth
$24,115.00
1,030.623 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0099%
83
Korbit
LINK-KRW$23.84
0.0065015 Eth
$21,092.00
902.466 LINK
0.0087%
84
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.68
0.0064607 Eth
$18,132.18
777.212 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0075%
85
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.79
0.0064935 Eth
$16,154.36
764.527 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0074%
86
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.80
0.0064917 Eth
$15,095.31
640.191 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0062%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.73
0.0064765 Eth
$14,191.66
601.364 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0058%
88
Dex-Trade
LINK-ETH$23.76
0.0064934 Eth
$13,308.41
560.230 LINK
0.0054%
89
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.85
0.0065091 Eth
$10,853.01
454.054 0X5947BB275C521040051D82396192181B413227A3
0.0044%
90
KuCoin
LINK-KCS$23.85
0.0065039 Eth
$10,811.03
453.303 LINK
0.0044%
91
Biswap V3
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.69
0.0064598 Eth
$9,758.04
417.369 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0040%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.83
0.0064977 Eth
$7,671.42
326.633 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0031%
93
Binance US
LINK-BTC$23.76
0.0064801 Eth
$6,995.21
294.453 LINK
0.0028%
94
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.75
0.0064776 Eth
$6,375.10
6,283.730 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0605%
95
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.75
0.0064782 Eth
$6,286.87
6,183.909 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0595%
96
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.69
0.0064661 Eth
$3,740.99
158.594 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0015%
97
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.66
0.0064623 Eth
$2,888.43
8.291 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
98
CoinEx
LINK-BTC$23.76
0.0064877 Eth
$2,392.62
101.634 LINK
0.0010%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$23.78
0.0064903 Eth
$2,360.05
101.106 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0010%
100
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$23.82
0.0065016 Eth
$2,291.59
96.245 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0009%

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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