ETH Price: $2,320.37 (-5.16%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,223 ( 0.007%)

Market

Price

$10.47 @ 0.004512 ETH (-3.47%)

Onchain Market Cap

$10,470,000,000.00

Circulating Supply Market Cap

$6,552,806,097.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
14.949147015276979475 LINK

Value
$156.52 ( ~0.0674548358175903 Eth) [0.0000%]
0xB5522D3C81ffAe67AaC360D466Dd5df1927D23cd
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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 9418.18% |ETH 0.0003846 1073.17%

Market

Volume (24H):$531,054,482.00
Market Capitalization:$6,552,806,097.00
Circulating Supply:626,849,971.00 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
LBank
LINK-USDT$10.46
0.0045042 Eth
$37,962,342.00
3,629,112.060 LINK
14.9571%
2
Binance
LINK-USDT$10.42
0.0044862 Eth
$36,003,593.00
3,399,362.410 LINK
14.0102%
3
WhiteBIT
LINK-USDT$10.46
0.0044986 Eth
$28,344,654.00
2,709,891.260 LINK
11.1686%
4
Bybit
LINK-USDT$10.46
0.0045034 Eth
$21,872,813.00
2,066,979.857 LINK
8.5189%
5
Coinbase Exchange
LINK-USD$10.45
0.0044957 Eth
$19,082,106.00
1,825,514.760 LINK
7.5237%
6
HTX
LINK-USDT$10.45
0.0044981 Eth
$13,168,655.00
1,242,323.915 LINK
5.1201%
7
Bitget
LINK-USDT$10.42
0.0044842 Eth
$9,715,654.00
915,204.164 LINK
3.7719%
8
P2B
LINK-USDT$10.46
0.0045042 Eth
$6,624,567.00
633,293.270 LINK
2.6101%
9
OKX
LINK-USDT$10.41
0.0044799 Eth
$6,189,228.00
584,098.350 LINK
2.4073%
10
Slex
LINK-USDT$10.47
0.0045032 Eth
$6,123,112.00
575,666.270 LINK
2.3726%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.42
0.0044839 Eth
$5,399,709.00
520,154.407 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.1438%
12
Azbit
LINK-USDT$10.46
0.0045006 Eth
$4,902,765.00
461,096.840 LINK
1.9004%
13
DigiFinex
LINK-USDT$10.42
0.0044853 Eth
$4,590,300.00
440,507.650 LINK
1.8155%
14
Biconomy.com
LINK-USDT$10.44
0.0044924 Eth
$4,251,905.00
400,308.560 LINK
1.6498%
15
KuCoin
LINK-USDT$10.42
0.0044871 Eth
$4,157,557.00
398,814.940 LINK
1.6437%
16
XT.COM
LINK-USDT$10.48
0.0045139 Eth
$3,366,213.00
317,792.830 LINK
1.3098%
17
CoinW
LINK-USDT$10.45
0.0045065 Eth
$2,793,434.00
267,261.070 LINK
1.1015%
18
Kraken
LINK-USD$10.45
0.0045008 Eth
$2,568,690.00
245,747.463 LINK
1.0128%
19
ProBit Global
LINK-USDT$10.44
0.0044978 Eth
$2,559,600.00
245,055.405 LINK
1.0100%
20
Coinstore
LINK-USDT$10.41
0.0044991 Eth
$2,140,612.00
201,814.310 LINK
0.8318%
21
Trubit
LINK-USDT$10.46
0.0045029 Eth
$2,073,685.00
195,606.530 LINK
0.8062%
22
Bitunix
LINK-USDT$10.42
0.0044842 Eth
$1,721,604.00
165,249.870 LINK
0.6811%
23
BYDFi
LINK-USDT$10.43
0.0044905 Eth
$1,701,726.00
163,160.880 LINK
0.6725%
24
AscendEX (BitMax)
LINK-USDT$10.45
0.0044974 Eth
$1,675,403.00
160,347.500 LINK
0.6609%
25
FameEX
LINK-USDT$10.41
0.0044840 Eth
$1,432,232.00
135,238.917 LINK
0.5574%
26
Bitexen
LINK-TRY$10.50
0.0045176 Eth
$1,281,769.00
122,053.270 LINK
0.5030%
27
WhiteBIT
LINK-BTC$10.47
0.0045047 Eth
$1,281,243.00
122,326.100 LINK
0.5042%
28
Dex-Trade
LINK-USDT$10.42
0.0044856 Eth
$1,181,313.00
113,376.320 LINK
0.4673%
29
Bitvavo
LINK-EUR$10.45
0.0045028 Eth
$989,184.00
94,626.025 LINK
0.3900%
30
BTSE
LINK-USDT$10.44
0.0044924 Eth
$931,592.00
89,196.473 LINK
0.3676%
31
Azbit
LINK-ETH$10.47
0.0045026 Eth
$880,807.00
84,546.515 LINK
0.3485%
32
Bitexen
LINK-USDT$10.46
0.0044987 Eth
$843,910.00
80,697.200 LINK
0.3326%
33
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.45
0.0044950 Eth
$824,838.00
78,728.836 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3245%
34
FMCPAY
LINK-USDT$10.45
0.0045004 Eth
$792,014.00
74,503.302 LINK
0.3071%
35
WhiteBIT
LINK-EUR$10.43
0.0044848 Eth
$716,427.00
68,704.230 LINK
0.2832%
36
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.42
0.0044863 Eth
$662,483.00
64,112.603 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2642%
37
BigONE
LINK-USDT$10.44
0.0044897 Eth
$543,137.00
52,040.110 LINK
0.2145%
38
tanX
LINK-USDC$10.45
0.0044986 Eth
$535,230.00
50,448.430 LINK
0.2079%
39
PointPay
LINK-USDT$10.44
0.0044939 Eth
$522,318.00
49,447.018 LINK
0.2038%
40
LATOKEN
LINK-USDT$10.47
0.0045043 Eth
$506,077.00
48,339.739 LINK
0.1992%
41
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.41
0.0044826 Eth
$504,168.00
48,593.850 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2003%
42
EXMO
LINK-USDT$10.44
0.0044934 Eth
$501,524.00
48,054.573 LINK
0.1981%
43
FMCPAY
LINK-BTC$10.46
0.0045016 Eth
$446,043.00
42,445.100 LINK
0.1749%
44
Bybit
LINK-USDC$10.47
0.0045054 Eth
$423,205.00
39,821.676 LINK
0.1641%
45
ProBit Global
LINK-BTC$10.46
0.0045034 Eth
$418,485.00
40,016.377 LINK
0.1649%
46
Phemex
LINK-USDT$10.46
0.0045088 Eth
$400,083.00
38,258.040 LINK
0.1577%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.48
0.0045080 Eth
$378,449.00
36,437.796 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1502%
48
FMCPAY
LINK-ETH$10.46
0.0044986 Eth
$368,658.00
35,481.440 LINK
0.1462%
49
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.40
0.0044792 Eth
$340,629.00
33,015.443 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1361%
50
EarnBIT
LINK-USDT$10.47
0.0045028 Eth
$293,855.00
27,712.618 LINK
0.1142%
51
Coinbase Exchange
LINK-EUR$10.47
0.0045014 Eth
$265,953.00
25,410.420 LINK
0.1047%
52
CoinEx
LINK-USDT$10.46
0.0044982 Eth
$196,138.00
18,509.277 LINK
0.0763%
53
LATOKEN
LINK-BTC$10.46
0.0044996 Eth
$191,524.00
18,313.186 LINK
0.0755%
54
BitDelta
LINK-USDT$10.47
0.0045032 Eth
$182,874.00
17,221.000 LINK
0.0710%
55
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.42
0.0044839 Eth
$172,505.00
16,331.677 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0673%
56
BitMart
LINK-BTC$10.46
0.0045042 Eth
$167,435.00
16,006.460 LINK
0.0660%
57
Coinbase Exchange
LINK-GBP$10.46
0.0045062 Eth
$152,843.00
14,616.210 LINK
0.0602%
58
BYDFi
LINK-USDC$10.46
0.0045042 Eth
$151,762.00
14,507.010 LINK
0.0598%
59
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.48
0.0045069 Eth
$145,650.00
13,772.794 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0568%
60
Bitbank
LINK-JPY$10.50
0.0045139 Eth
$141,963.00
13,526.228 LINK
0.0557%
61
OKX
LINK-USDC$10.45
0.0044998 Eth
$133,491.00
12,565.567 LINK
0.0518%
62
Nonkyc.io
LINK-USDT$10.43
0.0044903 Eth
$130,257.00
12,318.677 LINK
0.0508%
63
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.48
0.0045080 Eth
$127,218.00
128,214.629 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5284%
64
Gemini
LINK-USD$10.41
0.0044840 Eth
$102,853.00
9,876.670 LINK
0.0407%
65
WhiteBIT
LINK-TRY$10.53
0.0045271 Eth
$100,542.00
9,551.730 LINK
0.0394%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.48
0.0045080 Eth
$94,134.00
8,909.037 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0367%
67
Slex
LINK-BTC$10.47
0.0045073 Eth
$87,664.00
8,355.100 LINK
0.0344%
68
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.43
0.0044840 Eth
$86,307.00
87,341.657 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3600%
69
GMO Japan
LINK-JPY$10.43
0.0044886 Eth
$67,726.00
6,494.600 LINK
0.0268%
70
Slex
LINK-ETH$10.47
0.0045076 Eth
$62,349.00
5,999.940 LINK
0.0247%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.48
0.0045123 Eth
$57,874.00
5,569.286 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0230%
72
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.37
0.0044665 Eth
$57,057.00
5,415.064 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0223%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.48
0.0045080 Eth
$55,982.00
5,316.308 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0219%
74
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.40
0.0044792 Eth
$55,469.00
56,395.172 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2324%
75
LATOKEN
LINK-ETH$10.47
0.0045057 Eth
$53,592.00
5,117.442 LINK
0.0211%
76
PointPay
LINK-BTC$10.45
0.0045032 Eth
$50,754.00
4,839.017 LINK
0.0199%
77
Bitget
LINK-EUR$10.43
0.0044894 Eth
$48,283.00
4,540.870 LINK
0.0187%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.46
0.0044981 Eth
$36,883.00
3,475.328 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0143%
79
Uniswap V3 (Ethereum)
0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23-0X514910771AF9CA656AF840DFF83E8264ECF986CA$10.45
0.0044973 Eth
$36,447.00
204,498.504 0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23
0.8428%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.41
0.0044844 Eth
$32,372.00
3,100.342 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0128%
81
Mercado Bitcoin
LINK-BRL$10.43
0.0044881 Eth
$29,300.00
2,808.111 LINK
0.0116%
82
Binance US
LINK-USDT$10.43
0.0044925 Eth
$27,662.00
2,652.264 LINK
0.0109%
83
KuCoin
LINK-BTC$10.43
0.0044881 Eth
$22,086.00
2,118.119 LINK
0.0087%
84
KuCoin
LINK-KCS$10.47
0.0045076 Eth
$17,357.31
1,657.427 LINK
0.0068%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.45
0.0044964 Eth
$15,160.39
1,444.278 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0060%
86
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$10.46
0.0045018 Eth
$10,319.26
17.791 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.42
0.0044863 Eth
$9,276.76
9,395.804 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0387%
88
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.48
0.0045088 Eth
$8,127.64
764.594 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0032%
89
CoinEx
LINK-BTC$10.42
0.0044809 Eth
$7,581.33
720.296 LINK
0.0030%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.46
0.0045105 Eth
$4,777.86
460.336 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0019%
91
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.41
0.0044799 Eth
$4,163.91
392.790 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0016%
92
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.39
0.0044705 Eth
$3,243.81
313.785 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0013%
93
CoinEx
LINK-USDC$10.50
0.0045178 Eth
$3,215.46
301.928 LINK
0.0012%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.46
0.0044984 Eth
$3,172.40
300.093 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0012%
95
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.41
0.0044809 Eth
$1,988.86
192.460 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0008%
96
Honeyswap
0XE2E73A1C69ECF83F464EFCE6A5BE353A37CA09B2-0XE91D153E0B41518A2CE8DD3D7944FA863463A97D$10.35
0.0044525 Eth
$1,789.08
179.259 0XE2E73A1C69ECF83F464EFCE6A5BE353A37CA09B2
0.0007%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.48
0.0045088 Eth
$1,689.63
159.419 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0007%
98
Balancer V2 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$10.53
0.0045356 Eth
$1,154.07
109.643 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
99
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$10.43
0.0044840 Eth
$718.08
67.830 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0003%
100
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$10.45
0.0045039 Eth
$705.58
713.619 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0029%

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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