ETH Price: $2,497.21 (-1.49%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,332 ( -0.007%)

Market

Price

$11.16 @ 0.004469 ETH (-2.00%)

Onchain Market Cap

$11,160,000,000.00

Circulating Supply Market Cap

$6,992,912,490.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.8721 LINK

Value
$9.73 ( ~0.00389635391137115 Eth) [0.0000%]
0x8e69a5098a077e70da5618aff184cd526f2e6733
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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 10045.45% |ETH 0.0003846 1061.99%

Market

Volume (24H):$409,551,506.00
Market Capitalization:$6,992,912,490.00
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
WhiteBIT
LINK-USDT$11.17
0.0044793 Eth
$33,266,865.00
2,977,810.120 LINK
16.2082%
2
Binance
LINK-USDT$11.17
0.0044736 Eth
$32,455,540.00
2,857,378.570 LINK
15.5527%
3
HTX
LINK-USDT$11.21
0.0044911 Eth
$12,522,586.00
1,106,444.637 LINK
6.0224%
4
Coinbase Exchange
LINK-USD$11.17
0.0044824 Eth
$10,801,246.00
966,727.470 LINK
5.2619%
5
Bybit
LINK-USDT$11.18
0.0044776 Eth
$10,180,480.00
898,922.755 LINK
4.8928%
6
Bitget
LINK-USDT$11.21
0.0044913 Eth
$10,074,344.00
889,404.901 LINK
4.8410%
7
BTSE
LINK-USDT$11.18
0.0044825 Eth
$7,256,958.00
649,128.779 LINK
3.5332%
8
Gate.io
LINK-USDT$11.21
0.0044905 Eth
$7,131,059.00
626,728.570 LINK
3.4113%
9
OKX
LINK-USDT$11.20
0.0044895 Eth
$6,444,485.00
567,309.906 LINK
3.0879%
10
P2B
LINK-USDT$11.16
0.0044733 Eth
$6,030,829.00
540,566.800 LINK
2.9423%
11
Ourbit
LINK-USDT$11.15
0.0044706 Eth
$5,562,572.00
489,683.470 LINK
2.6653%
12
WEEX
LINK-USDT$11.17
0.0044713 Eth
$5,436,025.00
478,382.190 LINK
2.6038%
13
Slex
LINK-USDT$11.16
0.0044726 Eth
$5,411,641.00
477,484.460 LINK
2.5989%
14
DigiFinex
LINK-USDT$11.21
0.0044925 Eth
$4,470,185.00
398,609.590 LINK
2.1696%
15
Biconomy.com
LINK-USDT$11.21
0.0044906 Eth
$3,950,463.00
348,650.850 LINK
1.8977%
16
Azbit
LINK-USDT$11.19
0.0044805 Eth
$3,837,786.00
339,379.250 LINK
1.8472%
17
XT.COM
LINK-USDT$11.17
0.0044818 Eth
$3,324,789.00
292,942.270 LINK
1.5945%
18
Bitunix
LINK-USDT$11.16
0.0044737 Eth
$3,225,969.00
289,129.280 LINK
1.5737%
19
Hotcoin
LINK-USDT$11.20
0.0044919 Eth
$2,876,043.00
256,787.990 LINK
1.3977%
20
CoinW
LINK-USDT$11.21
0.0044920 Eth
$2,689,768.00
239,878.530 LINK
1.3057%
21
Coinstore
LINK-USDT$11.15
0.0044716 Eth
$2,186,025.00
192,737.890 LINK
1.0491%
22
ProBit Global
LINK-USDT$11.15
0.0044738 Eth
$1,942,443.00
174,132.582 LINK
0.9478%
23
HashKey Global
LINK-USDT$11.16
0.0044630 Eth
$1,847,107.00
163,072.025 LINK
0.8876%
24
LBank
LINK-USDT$11.16
0.0044759 Eth
$1,791,339.00
160,560.590 LINK
0.8739%
25
AscendEX (BitMax)
LINK-USDT$11.20
0.0044870 Eth
$1,699,939.00
151,803.000 LINK
0.8263%
26
KuCoin
LINK-USDT$11.21
0.0044908 Eth
$1,690,121.00
150,727.780 LINK
0.8204%
27
BYDFi
LINK-USDT$11.16
0.0044689 Eth
$1,509,554.00
135,319.450 LINK
0.7365%
28
Trubit
LINK-USDT$11.14
0.0044625 Eth
$1,504,524.00
132,089.970 LINK
0.7190%
29
WhiteBIT
LINK-BTC$11.14
0.0044640 Eth
$1,274,120.00
114,355.360 LINK
0.6224%
30
Dex-Trade
LINK-USDT$11.18
0.0044799 Eth
$1,083,404.00
96,914.960 LINK
0.5275%
31
Azbit
LINK-ETH$11.16
0.0044706 Eth
$716,504.00
63,858.615 LINK
0.3476%
32
Bitvavo
LINK-EUR$11.23
0.0045045 Eth
$650,182.00
57,889.655 LINK
0.3151%
33
LATOKEN
LINK-USDT$11.17
0.0044799 Eth
$635,936.00
56,932.137 LINK
0.3099%
34
EXMO
LINK-USDT$11.17
0.0044769 Eth
$628,580.00
56,297.212 LINK
0.3064%
35
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.18
0.0044791 Eth
$553,082.00
49,170.778 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2676%
36
AscendEX (BitMax)
LINK-BTC$11.25
0.0045094 Eth
$548,715.00
48,756.000 LINK
0.2654%
37
PointPay
LINK-USDT$11.21
0.0044906 Eth
$511,776.00
45,086.918 LINK
0.2454%
38
BigONE
LINK-USDT$11.18
0.0044840 Eth
$489,058.00
43,731.940 LINK
0.2380%
39
Coinbase Exchange
LINK-USDT$11.15
0.0044742 Eth
$415,970.00
37,293.164 LINK
0.2030%
40
CoinEx
LINK-USDT$11.18
0.0044785 Eth
$405,346.00
35,655.838 LINK
0.1941%
41
tanX
LINK-USDC$11.18
0.0044703 Eth
$393,028.00
34,658.620 LINK
0.1886%
42
WhiteBIT
LINK-EUR$11.21
0.0044933 Eth
$386,278.00
34,469.440 LINK
0.1876%
43
Phemex
LINK-USDT$11.19
0.0044824 Eth
$333,709.00
29,834.840 LINK
0.1624%
44
LATOKEN
LINK-BTC$11.17
0.0044768 Eth
$327,341.00
29,304.109 LINK
0.1595%
45
WhiteBIT
LINK-TRY$11.25
0.0045098 Eth
$302,815.00
26,922.650 LINK
0.1465%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.14
0.0044656 Eth
$283,037.00
25,102.972 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1366%
47
ProBit Global
LINK-BTC$11.16
0.0044751 Eth
$261,581.00
23,442.769 LINK
0.1276%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.19
0.0044828 Eth
$215,494.00
19,141.884 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1042%
49
Gemini
LINK-USD$11.16
0.0044698 Eth
$207,196.00
18,570.912 LINK
0.1011%
50
BitMart
LINK-BTC$11.15
0.0044702 Eth
$194,510.00
17,444.580 LINK
0.0950%
51
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.13
0.0044577 Eth
$181,061.00
15,954.939 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0868%
52
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.18
0.0044771 Eth
$172,664.00
15,329.364 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0834%
53
Coinbase Exchange
LINK-EUR$11.26
0.0045118 Eth
$167,452.00
14,868.990 LINK
0.0809%
54
OKX
LINK-USDC$11.20
0.0044857 Eth
$166,751.00
14,649.934 LINK
0.0797%
55
BitDelta
LINK-USDT$11.21
0.0044906 Eth
$153,112.00
13,512.000 LINK
0.0735%
56
BYDFi
LINK-USDC$11.16
0.0044682 Eth
$144,925.00
12,985.470 LINK
0.0707%
57
Coinbase Exchange
LINK-GBP$11.19
0.0044850 Eth
$143,333.00
12,803.560 LINK
0.0697%
58
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.19
0.0044827 Eth
$131,449.00
133,693.796 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.7277%
59
Slex
LINK-BTC$11.19
0.0044820 Eth
$99,721.00
8,827.700 LINK
0.0480%
60
GMO Japan
LINK-JPY$11.26
0.0045123 Eth
$91,931.00
8,164.700 LINK
0.0444%
61
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.11
0.0044533 Eth
$79,863.00
81,473.498 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4435%
62
Bitkub
LINK-THB$11.20
0.0044861 Eth
$63,868.00
5,700.924 LINK
0.0310%
63
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.18
0.0044799 Eth
$63,551.00
5,583.620 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0304%
64
PointPay
LINK-BTC$11.21
0.0044906 Eth
$60,888.00
5,386.879 LINK
0.0293%
65
Slex
LINK-ETH$11.15
0.0044721 Eth
$54,493.00
4,852.020 LINK
0.0264%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.14
0.0044656 Eth
$50,359.00
4,427.902 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0241%
67
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.12
0.0044540 Eth
$48,671.00
4,347.649 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0237%
68
Bitso
LINK-USD$11.19
0.0044850 Eth
$42,603.00
3,806.100 LINK
0.0207%
69
KuCoin
LINK-USDC$11.22
0.0044933 Eth
$41,952.00
3,739.253 LINK
0.0204%
70
Binance US
LINK-USDT$11.15
0.0044653 Eth
$40,290.00
3,615.047 LINK
0.0197%
71
Coinbase Exchange
LINK-BTC$11.13
0.0044629 Eth
$35,353.00
3,175.790 LINK
0.0173%
72
Bitcointry
LINK-USDT$11.14
0.0044659 Eth
$34,474.00
3,041.374 LINK
0.0166%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.16
0.0044716 Eth
$34,185.00
3,003.266 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0163%
74
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.15
0.0044651 Eth
$33,024.00
33,722.379 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1836%
75
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.15
0.0044674 Eth
$20,975.00
1,862.357 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0101%
76
Nonkyc.io
LINK-BTC$11.17
0.0044764 Eth
$18,312.73
1,621.533 LINK
0.0088%
77
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.12
0.0044560 Eth
$17,431.91
1,546.197 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0084%
78
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.12
0.0044532 Eth
$15,108.54
15,390.277 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0838%
79
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.20
0.0044858 Eth
$14,866.86
8,674.180 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0472%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.18
0.0044804 Eth
$13,256.69
1,178.988 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0064%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.16
0.0044741 Eth
$11,936.19
1,061.512 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0058%
82
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.11
0.0044511 Eth
$11,798.99
1,078.391 0X5947BB275C521040051D82396192181B413227A3
0.0059%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD93F7E271CB87C23AAA73EDC008A79646D1F9912$11.25
0.0045061 Eth
$11,193.53
987.125 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0054%
84
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.15
0.0044667 Eth
$8,945.79
807.818 0X5947BB275C521040051D82396192181B413227A3
0.0044%
85
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.13
0.0044574 Eth
$6,136.71
540.233 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0029%
86
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$11.17
0.0044768 Eth
$5,988.83
526.829 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0029%
87
Kanga
LINK-USDT$11.17
0.0044822 Eth
$5,856.00
0.000 LINK
0.0000%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.14
0.0044656 Eth
$5,527.63
489.129 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0027%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$11.15
0.0044696 Eth
$4,765.14
419.185 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0023%
90
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$11.12
0.0044583 Eth
$3,004.27
21.454 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
91
CoinEx
LINK-BTC$11.12
0.0044625 Eth
$2,177.80
192.970 LINK
0.0011%
92
CoinEx
LINK-USDC$11.14
0.0044695 Eth
$2,098.34
185.286 LINK
0.0010%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.13
0.0044618 Eth
$2,013.52
178.545 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0010%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.20
0.0044842 Eth
$1,646.54
146.255 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0008%
95
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$11.09
0.0044506 Eth
$1,514.13
1,546.021 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0084%
96
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$11.13
0.0044630 Eth
$1,308.83
115.150 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0006%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$11.13
0.0044618 Eth
$1,043.46
92.020 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
98
Uniswap V3 (Arbitrum One)
0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.15
0.0044682 Eth
$929.67
195.287 0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8
0.0011%
99
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$11.15
0.0044645 Eth
$910.72
83.845 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
100
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.25
0.0045011 Eth
$173.68
14.619 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
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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