ETH Price: $3,269.75 (+0.78%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,509 ( -0.028%)

Market

Price

$20.02 @ 0.006123 ETH (+0.48%)

Onchain Market Cap

$20,020,000,000.00

Circulating Supply Market Cap

$12,636,897,968.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.620808216674016593 LINK

Value
$12.43 ( ~0.00380151925960651 Eth) [0.0000%]
0x463e46D1146cC2E929c0466Ba61F368799597de7
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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 18100% |ETH 0.0003846 1492.04%

Market

Volume (24H):$526,188,248.00
Market Capitalization:$12,636,897,968.00
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
Websea
LINK-USDT$19.98
0.0061058 Eth
$57,582,171.00
0.000 LINK
0.0000%
2
Coinbase Exchange
LINK-USD$19.98
0.0061087 Eth
$22,616,686.00
1,131,852.960 LINK
10.7433%
3
WEEX
LINK-USDT$19.99
0.0061148 Eth
$13,096,224.00
651,725.330 LINK
6.1860%
4
Bitget
LINK-USDT$19.97
0.0061056 Eth
$12,240,327.00
608,598.778 LINK
5.7767%
5
P2B
LINK-USDT$20.00
0.0061122 Eth
$11,383,581.00
569,103.810 LINK
5.4018%
6
Bybit
LINK-USDT$19.98
0.0061075 Eth
$10,289,980.00
511,404.571 LINK
4.8541%
7
HTX
LINK-USDT$19.98
0.0061074 Eth
$9,348,476.00
465,297.806 LINK
4.4165%
8
BVOX
LINK-USDT$20.00
0.0061106 Eth
$7,712,288.00
383,684.870 LINK
3.6418%
9
Ourbit
LINK-USDT$20.00
0.0061103 Eth
$7,667,751.00
381,453.930 LINK
3.6207%
10
MEXC
LINK-USDT$19.98
0.0061086 Eth
$6,561,399.00
328,368.570 LINK
3.1168%
11
DigiFinex
LINK-USDT$19.98
0.0061077 Eth
$6,473,521.00
324,019.080 LINK
3.0755%
12
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.96
0.0061017 Eth
$5,844,763.00
290,485.872 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.7572%
13
Deepcoin
LINK-USDT$20.02
0.0061194 Eth
$5,528,934.00
310,595.060 LINK
2.9481%
14
XT.COM
LINK-USDT$19.99
0.0061088 Eth
$5,433,561.00
270,254.080 LINK
2.5652%
15
Azbit
LINK-USDT$19.99
0.0061092 Eth
$5,386,758.00
267,927.588 LINK
2.5431%
16
FameEX
LINK-USDT$19.98
0.0061077 Eth
$5,383,100.00
267,688.244 LINK
2.5408%
17
OKX
LINK-USDT$19.97
0.0061046 Eth
$5,063,891.00
252,052.638 LINK
2.3924%
18
Coinstore
LINK-USDT$19.94
0.0060978 Eth
$4,868,804.00
242,295.790 LINK
2.2998%
19
CoinW
LINK-USDT$19.98
0.0061078 Eth
$4,380,592.00
219,257.370 LINK
2.0811%
20
Gate.io
LINK-USDT$19.97
0.0061058 Eth
$3,859,468.00
191,778.280 LINK
1.8203%
21
Toobit
LINK-USDT$19.98
0.0061088 Eth
$3,436,775.00
170,923.870 LINK
1.6224%
22
BYDFi
LINK-USDT$20.00
0.0061118 Eth
$3,022,159.00
151,114.600 LINK
1.4343%
23
BTSE
LINK-USDT$19.99
0.0061098 Eth
$2,860,814.00
143,077.547 LINK
1.3581%
24
Kraken
LINK-USD$19.98
0.0061072 Eth
$2,805,337.00
140,438.598 LINK
1.3330%
25
LBank
LINK-USDT$19.98
0.0061086 Eth
$2,665,997.00
133,421.200 LINK
1.2664%
26
LATOKEN
LINK-USDT$20.00
0.0061118 Eth
$2,625,342.00
131,272.889 LINK
1.2460%
27
QMall
LINK-USDT$20.00
0.0061122 Eth
$2,150,489.00
106,967.316 LINK
1.0153%
28
KuCoin
LINK-USDT$19.99
0.0061109 Eth
$1,971,559.00
98,639.056 LINK
0.9363%
29
Dex-Trade
LINK-USDT$20.01
0.0061152 Eth
$1,775,592.00
88,723.510 LINK
0.8421%
30
FMCPAY
LINK-USDT$19.98
0.0061088 Eth
$1,696,224.00
84,521.394 LINK
0.8023%
31
Coinbase Exchange
LINK-GBP$20.02
0.0061183 Eth
$1,469,361.00
73,393.610 LINK
0.6966%
32
Biconomy.com
LINK-USDT$20.02
0.0061235 Eth
$1,353,193.00
67,366.180 LINK
0.6394%
33
Coinbase Exchange
LINK-ETH$19.99
0.0061122 Eth
$1,229,427.00
61,496.050 LINK
0.5837%
34
CoinEx
LINK-USDT$20.00
0.0061110 Eth
$1,176,906.00
58,517.886 LINK
0.5554%
35
Bitvavo
LINK-EUR$20.02
0.0061206 Eth
$1,088,514.00
54,368.959 LINK
0.5161%
36
FMCPAY
LINK-ETH$19.98
0.0061072 Eth
$1,058,445.00
52,532.480 LINK
0.4986%
37
FMCPAY
LINK-BTC$19.98
0.0061089 Eth
$962,217.00
47,937.900 LINK
0.4550%
38
Coinbase Exchange
LINK-EUR$20.03
0.0061203 Eth
$917,882.00
45,832.160 LINK
0.4350%
39
PointPay
LINK-USDT$19.99
0.0061088 Eth
$897,520.00
44,636.868 LINK
0.4237%
40
Coinbase Exchange
LINK-USDT$20.07
0.0061333 Eth
$849,992.00
42,351.767 LINK
0.4020%
41
tanX
LINK-USDC$19.99
0.0061129 Eth
$785,900.00
39,173.540 LINK
0.3718%
42
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.01
0.0061172 Eth
$660,511.00
32,738.699 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3107%
43
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.01
0.0061178 Eth
$614,780.00
30,521.168 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2897%
44
Trubit
LINK-USDT$19.99
0.0061103 Eth
$575,274.00
28,629.300 LINK
0.2717%
45
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.00
0.0061152 Eth
$523,038.00
38,507.704 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3655%
46
EXMO
LINK-USDT$19.99
0.0061102 Eth
$515,724.00
25,802.563 LINK
0.2449%
47
Bitstamp
LINK-EUR$20.02
0.0061193 Eth
$477,377.00
23,848.858 LINK
0.2264%
48
BigONE
LINK-USDT$19.93
0.0060919 Eth
$470,115.00
23,583.500 LINK
0.2238%
49
Bitstamp
LINK-USD$20.00
0.0061142 Eth
$459,147.00
22,957.343 LINK
0.2179%
50
Bitbegin
LINK-USDT$19.99
0.0061117 Eth
$413,712.00
20,602.951 LINK
0.1956%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.02
0.0061199 Eth
$395,447.00
19,701.842 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1870%
52
OKX
LINK-USDC$19.99
0.0061110 Eth
$365,566.00
18,153.620 LINK
0.1723%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.99
0.0061102 Eth
$328,505.00
16,313.809 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1548%
54
Bitbank
LINK-JPY$20.09
0.0061394 Eth
$318,687.00
15,862.656 LINK
0.1506%
55
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.01
0.0061176 Eth
$315,967.00
317,728.340 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.0158%
56
BitMart
LINK-BTC$19.99
0.0061116 Eth
$265,669.00
13,288.980 LINK
0.1261%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.99
0.0061091 Eth
$243,433.00
12,083.575 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1147%
58
Coinbase Exchange
LINK-BTC$19.98
0.0061092 Eth
$230,073.00
11,513.900 LINK
0.1093%
59
QMall
LINK-USDC$20.00
0.0061117 Eth
$228,389.00
11,357.057 LINK
0.1078%
60
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.99
0.0061083 Eth
$227,275.00
229,027.963 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.1739%
61
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.08
0.0061401 Eth
$199,459.00
9,902.531 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0940%
62
BitDelta
LINK-USDT$20.00
0.0061122 Eth
$192,622.00
9,603.000 LINK
0.0911%
63
OKX
LINK-EUR$20.00
0.0061135 Eth
$155,176.00
7,689.966 LINK
0.0730%
64
Hotcoin
LINK-BTC$20.01
0.0061156 Eth
$120,150.00
6,003.800 LINK
0.0570%
65
Binance US
LINK-USDT$19.95
0.0060968 Eth
$114,500.00
5,739.146 LINK
0.0545%
66
BitMart
LINK-ETH$19.99
0.0061125 Eth
$85,678.00
4,285.080 LINK
0.0407%
67
KuCoin
LINK-USDC$20.00
0.0061144 Eth
$76,554.00
3,827.854 LINK
0.0363%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.99
0.0061091 Eth
$72,176.00
3,587.832 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0341%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.00
0.0061119 Eth
$65,257.00
3,237.765 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0307%
70
Hotcoin
LINK-ETH$20.00
0.0061125 Eth
$39,984.00
1,999.040 LINK
0.0190%
71
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061136 Eth
$37,941.00
38,136.122 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3620%
72
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.05
0.0061285 Eth
$35,906.00
1,783.580 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0169%
73
Bitso
LINK-USD$20.03
0.0061216 Eth
$34,244.00
1,709.486 LINK
0.0162%
74
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.02
0.0061185 Eth
$28,372.00
1,407.269 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0134%
75
BTCMarkets
LINK-AUD$20.10
0.0061421 Eth
$26,357.00
1,311.233 LINK
0.0124%
76
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$20.00
0.0061124 Eth
$21,269.00
1,059.382 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0101%
77
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.08
0.0061375 Eth
$20,355.00
1,024.866 0X5947BB275C521040051D82396192181B413227A3
0.0097%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.98
0.0061073 Eth
$18,066.08
900.478 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0085%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$20.00
0.0061131 Eth
$15,885.29
790.240 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0075%
80
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$20.04
0.0061257 Eth
$12,310.58
16.195 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
81
Bitexen
LINK-TRY$19.89
0.0060816 Eth
$11,770.74
591.903 LINK
0.0056%
82
Dex-Trade
LINK-ETH$20.01
0.0061238 Eth
$11,100.82
554.660 LINK
0.0053%
83
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$20.00
0.0061149 Eth
$10,604.03
526.754 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0050%
84
CoinEx
LINK-USDC$20.09
0.0061405 Eth
$6,375.56
316.423 LINK
0.0030%
85
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$20.03
0.0061224 Eth
$5,064.97
251.964 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0024%
86
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.99
0.0061123 Eth
$4,173.29
4,194.787 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0398%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061142 Eth
$3,682.36
3,696.617 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0351%
88
CoinEx
LINK-BTC$19.95
0.0061009 Eth
$2,669.60
133.072 LINK
0.0013%
89
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061142 Eth
$2,621.30
3,521.458 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0334%
90
KuCoin
LINK-KCS$20.01
0.0061168 Eth
$2,088.94
104.410 LINK
0.0010%
91
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061140 Eth
$1,874.45
6.622 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0001%
92
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$20.05
0.0061285 Eth
$1,734.30
85.913 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0008%
93
Lydia Finance
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.90
0.0060823 Eth
$1,530.39
77.547 0X5947BB275C521040051D82396192181B413227A3
0.0007%
94
Uniswap V3 (Arbitrum One)
0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061140 Eth
$1,446.17
371.127 0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8
0.0035%
95
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.02
0.0061209 Eth
$1,212.21
60.128 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$20.06
0.0061341 Eth
$1,194.37
58.859 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
97
Swapsicle
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.94
0.0060948 Eth
$896.95
45.661 0X5947BB275C521040051D82396192181B413227A3
0.0004%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.03
0.0061243 Eth
$796.65
39.510 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.03
0.0061281 Eth
$530.19
26.291 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$20.07
0.0061371 Eth
$263.94
13.143 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
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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