ETH Price: $2,765.39 (+4.76%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,513 ( 0.051%)

Market

Price

$17.90 @ 0.006473 ETH (+2.67%)

Onchain Market Cap

$17,900,000,000.00

Circulating Supply Market Cap

$11,417,687,261.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
32.5191387592495447 LINK

Value
$582.09 ( ~0.210490962012268 Eth) [0.0000%]
0x4C703393150e1f3978BB73363062b653b5D6daad
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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 16172.73% |ETH 0.0003846 1583.05%

Market

Volume (24H):$518,195,004.00
Market Capitalization:$11,417,687,261.00
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
WhiteBIT
LINK-USDT$17.87
0.0064615 Eth
$44,607,784.00
2,495,615.840 LINK
18.1185%
2
Bybit
LINK-USDT$17.86
0.0064568 Eth
$29,529,476.00
1,695,200.611 LINK
12.3074%
3
HTX
LINK-USDT$17.87
0.0064607 Eth
$19,905,725.00
1,134,510.425 LINK
8.2367%
4
Coinbase Exchange
LINK-USD$17.87
0.0064581 Eth
$18,042,007.00
1,009,851.520 LINK
7.3317%
5
OKX
LINK-USDT$17.88
0.0064637 Eth
$10,216,355.00
584,139.140 LINK
4.2409%
6
Slex
LINK-USDT$17.90
0.0064698 Eth
$10,129,796.00
576,712.450 LINK
4.1870%
7
P2B
LINK-USDT$17.89
0.0064665 Eth
$10,078,193.00
563,363.660 LINK
4.0901%
8
Gate.io
LINK-USDT$17.88
0.0064618 Eth
$9,079,099.00
517,871.340 LINK
3.7598%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.80
0.0064339 Eth
$6,331,351.00
352,997.655 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.5628%
10
KuCoin
LINK-USDT$17.87
0.0064602 Eth
$5,382,407.00
301,205.404 LINK
2.1868%
11
MEXC
LINK-EUR$17.86
0.0064577 Eth
$4,873,800.00
272,828.350 LINK
1.9808%
12
XT.COM
LINK-USDT$17.89
0.0064667 Eth
$4,771,372.00
272,396.240 LINK
1.9776%
13
MEXC
LINK-USDC$17.89
0.0064660 Eth
$4,711,621.00
263,377.470 LINK
1.9122%
14
Hotcoin
LINK-USDT$17.88
0.0064626 Eth
$4,387,909.00
245,410.130 LINK
1.7817%
15
Coinstore
LINK-USDT$17.90
0.0064702 Eth
$4,382,072.00
250,246.730 LINK
1.8168%
16
Binance
LINK-USDC$17.89
0.0064659 Eth
$4,101,930.00
234,135.350 LINK
1.6999%
17
CoinW
LINK-USDT$17.87
0.0064588 Eth
$3,664,836.00
205,108.400 LINK
1.4891%
18
Bitunix
LINK-USDT$17.89
0.0064674 Eth
$3,649,748.00
204,022.590 LINK
1.4812%
19
Kraken
LINK-USD$17.89
0.0064666 Eth
$3,176,096.00
177,563.015 LINK
1.2891%
20
Azbit
LINK-USDT$17.90
0.0064746 Eth
$3,076,253.00
175,594.540 LINK
1.2748%
21
BYDFi
LINK-USDT$17.90
0.0064709 Eth
$2,841,141.00
158,696.040 LINK
1.1522%
22
BTSE
LINK-USDT$17.89
0.0064668 Eth
$2,477,788.00
138,492.028 LINK
1.0055%
23
CoinEx
LINK-USDT$17.88
0.0064647 Eth
$2,262,429.00
129,906.137 LINK
0.9431%
24
QMall
LINK-USDT$17.90
0.0064701 Eth
$1,821,539.00
103,827.736 LINK
0.7538%
25
Biconomy.com
LINK-USDT$17.90
0.0064683 Eth
$1,760,752.00
100,463.090 LINK
0.7294%
26
Dex-Trade
LINK-USDT$17.90
0.0064713 Eth
$1,594,712.00
89,089.740 LINK
0.6468%
27
FMCPAY
LINK-USDT$17.88
0.0064641 Eth
$1,593,712.00
90,751.766 LINK
0.6589%
28
Bitvavo
LINK-EUR$17.90
0.0064693 Eth
$1,236,712.00
69,103.972 LINK
0.5017%
29
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.82
0.0064415 Eth
$1,141,909.00
63,535.136 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4613%
30
FMCPAY
LINK-ETH$17.90
0.0064681 Eth
$1,038,734.00
57,781.920 LINK
0.4195%
31
Bybit
LINK-USDC$17.90
0.0064698 Eth
$1,021,829.00
59,020.284 LINK
0.4285%
32
Coinbase Exchange
LINK-EUR$17.87
0.0064620 Eth
$945,237.00
52,882.080 LINK
0.3839%
33
FMCPAY
LINK-BTC$17.90
0.0064677 Eth
$858,037.00
48,689.700 LINK
0.3535%
34
Coinbase Exchange
LINK-GBP$17.88
0.0064657 Eth
$759,558.00
42,469.500 LINK
0.3083%
35
Binance
LINK-ETH$17.89
0.0064660 Eth
$700,333.00
38,809.420 LINK
0.2818%
36
tanX
LINK-USDC$17.89
0.0064676 Eth
$652,518.00
37,044.160 LINK
0.2689%
37
PointPay
LINK-USDT$17.89
0.0064665 Eth
$646,860.00
36,911.378 LINK
0.2680%
38
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.93
0.0064808 Eth
$639,242.00
35,374.231 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2568%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.91
0.0064738 Eth
$557,574.00
31,375.797 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2278%
40
BigONE
LINK-USDT$17.91
0.0064732 Eth
$527,792.00
29,470.220 LINK
0.2140%
41
EXMO
LINK-USDT$17.87
0.0064608 Eth
$524,796.00
29,365.384 LINK
0.2132%
42
EarnBIT
LINK-USDT$17.89
0.0064703 Eth
$463,953.00
26,502.112 LINK
0.1924%
43
WhiteBIT
LINK-BTC$17.92
0.0064769 Eth
$446,196.00
24,902.160 LINK
0.1808%
44
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.83
0.0064458 Eth
$444,915.00
24,596.220 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1786%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.87
0.0064582 Eth
$409,271.00
22,884.563 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1661%
46
Binance
LINK-EUR$17.88
0.0064652 Eth
$408,387.00
23,309.960 LINK
0.1692%
47
Bitbank
LINK-JPY$17.96
0.0064915 Eth
$372,368.00
20,735.043 LINK
0.1505%
48
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.92
0.0064780 Eth
$364,277.00
40,387.359 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2932%
49
LATOKEN
LINK-BTC$17.90
0.0064698 Eth
$355,936.00
19,887.179 LINK
0.1444%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.87
0.0064582 Eth
$332,615.00
18,982.197 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1378%
51
Binance
LINK-TRY$17.93
0.0064822 Eth
$303,128.00
17,211.500 LINK
0.1250%
52
QMall
LINK-USDC$17.89
0.0064674 Eth
$295,532.00
16,845.733 LINK
0.1223%
53
BitMart
LINK-BTC$17.89
0.0064681 Eth
$289,944.00
16,204.340 LINK
0.1176%
54
Gemini
LINK-USD$17.88
0.0064640 Eth
$233,056.00
13,033.032 LINK
0.0946%
55
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.87
0.0064582 Eth
$229,697.00
226,263.732 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.6427%
56
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.86
0.0064538 Eth
$227,685.00
13,081.273 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0950%
57
Slex
LINK-ETH$17.89
0.0064660 Eth
$217,928.00
12,091.240 LINK
0.0878%
58
WEEX
LINK-USDC$17.87
0.0064594 Eth
$186,844.00
10,670.800 LINK
0.0775%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.89
0.0064663 Eth
$180,133.00
9,999.982 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0726%
60
Bybit
LINK-EUR$17.85
0.0064525 Eth
$172,551.00
9,982.750 LINK
0.0725%
61
BitDelta
LINK-USDT$17.89
0.0064662 Eth
$171,733.00
9,792.000 LINK
0.0711%
62
OKX
LINK-USDC$17.88
0.0064654 Eth
$160,718.00
9,162.566 LINK
0.0665%
63
Hotcoin
LINK-BTC$17.90
0.0064733 Eth
$154,181.00
8,614.930 LINK
0.0625%
64
BitStorage
LINK-ETH$17.87
0.0064595 Eth
$149,848.00
8,386.590 LINK
0.0609%
65
BYDFi
LINK-USDC$17.90
0.0064698 Eth
$130,461.00
7,289.080 LINK
0.0529%
66
KuCoin
LINK-USDC$17.90
0.0064712 Eth
$127,302.00
7,111.923 LINK
0.0516%
67
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.83
0.0064437 Eth
$123,886.00
7,069.215 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0513%
68
GMO Japan
LINK-JPY$17.98
0.0065005 Eth
$118,519.00
6,590.800 LINK
0.0479%
69
bitcastle
LINK-USDT$17.89
0.0064704 Eth
$101,399.00
5,779.950 LINK
0.0420%
70
Gemini
LINK-BTC$17.95
0.0064899 Eth
$100,109.00
5,575.937 LINK
0.0405%
71
Bitkub
LINK-THB$17.90
0.0064701 Eth
$98,868.00
5,524.329 LINK
0.0401%
72
BitMart
LINK-ETH$17.90
0.0064706 Eth
$90,468.00
5,054.140 LINK
0.0367%
73
Bitso
LINK-USD$17.85
0.0064524 Eth
$84,757.00
4,748.229 LINK
0.0345%
74
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.88
0.0064614 Eth
$67,419.00
3,746.988 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0272%
75
KuCoin
LINK-BTC$17.90
0.0064714 Eth
$63,157.00
3,528.237 LINK
0.0256%
76
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.85
0.0064528 Eth
$54,414.00
3,023.898 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0220%
77
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.98
0.0064994 Eth
$54,393.00
3,090.730 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0224%
78
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.85
0.0064543 Eth
$47,568.00
46,612.451 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3384%
79
Bitstamp
LINK-GBP$17.90
0.0064695 Eth
$41,259.00
2,305.323 LINK
0.0167%
80
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.85
0.0064510 Eth
$33,659.00
1,872.170 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0136%
81
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.88
0.0064614 Eth
$31,876.00
31,461.294 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2284%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.95
0.0064888 Eth
$26,672.00
1,503.156 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0109%
83
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.87
0.0064603 Eth
$21,963.00
21,499.461 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1561%
84
Dex-Trade
LINK-ETH$17.88
0.0064655 Eth
$18,169.25
1,015.940 LINK
0.0074%
85
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.83
0.0064437 Eth
$16,371.42
938.362 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0068%
86
HashKey Global
LINK-USDT$17.90
0.0064711 Eth
$15,405.09
876.917 LINK
0.0064%
87
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.93
0.0064826 Eth
$15,346.06
1,802.455 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0131%
88
CoinEx
LINK-USDC$17.95
0.0064888 Eth
$12,594.93
717.960 LINK
0.0052%
89
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.84
0.0064481 Eth
$9,625.99
9,446.444 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0686%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.86
0.0064574 Eth
$9,249.30
527.656 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0038%
91
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.93
0.0064804 Eth
$8,372.50
476.022 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0035%
92
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.83
0.0064450 Eth
$8,363.43
33.690 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0002%
93
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.94
0.0064860 Eth
$8,062.57
442.508 0X5947BB275C521040051D82396192181B413227A3
0.0032%
94
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$17.93
0.0064824 Eth
$8,061.06
451.561 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0033%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$17.96
0.0064916 Eth
$7,211.14
409.467 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0030%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.87
0.0064600 Eth
$6,274.62
348.876 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0025%
97
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.88
0.0064626 Eth
$4,911.92
280.729 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0020%
98
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.90
0.0064722 Eth
$3,892.64
216.265 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0016%
99
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.92
0.0064786 Eth
$3,873.07
15.549 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
100
Uniswap V4 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.88
0.0064605 Eth
$3,806.31
3,729.199 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0271%

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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