ETH Price: $3,278.85 (+1.06%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,492 ( -0.033%)

Market

Price

$20.05 @ 0.006115 ETH (+0.94%)

Onchain Market Cap

$20,050,000,000.00

Circulating Supply Market Cap

$12,652,872,527.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.610636072775667537 LINK

Value
$12.24 ( ~0.00373301592241259 Eth) [0.0000%]
0x12adc9cd9217c983265ad4a4f33a97c5207e72d6
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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 18127.27% |ETH 0.0003846 1489.96%

Market

Volume (24H):$569,747,087.00
Market Capitalization:$12,652,872,527.00
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
Binance
LINK-USDT$20.05
0.0061301 Eth
$60,610,082.00
3,020,421.460 LINK
27.0009%
2
Websea
LINK-USDT$20.09
0.0061315 Eth
$56,612,995.00
0.000 LINK
0.0000%
3
Coinbase Exchange
LINK-USD$20.08
0.0061304 Eth
$22,491,759.00
1,120,274.910 LINK
10.0146%
4
WEEX
LINK-USDT$20.06
0.0061315 Eth
$13,939,877.00
694,892.870 LINK
6.2120%
5
P2B
LINK-USDT$20.10
0.0061339 Eth
$12,286,837.00
611,264.840 LINK
5.4644%
6
Bybit
LINK-USDT$20.08
0.0061286 Eth
$11,490,913.00
572,111.514 LINK
5.1144%
7
HTX
LINK-USDT$20.08
0.0061275 Eth
$9,623,681.00
479,293.578 LINK
4.2846%
8
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.07
0.0061266 Eth
$8,220,330.00
66,135.961 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.5912%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.08
0.0061323 Eth
$6,244,356.00
310,446.559 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.7752%
10
XT.COM
LINK-USDT$20.08
0.0061301 Eth
$5,942,267.00
296,054.570 LINK
2.6466%
11
OKX
LINK-USDT$20.07
0.0061279 Eth
$5,552,085.00
276,747.362 LINK
2.4740%
12
Deepcoin
LINK-USDT$20.06
0.0061256 Eth
$5,434,939.00
340,534.160 LINK
3.0442%
13
Coinstore
LINK-USDT$20.01
0.0061189 Eth
$5,421,025.00
270,279.570 LINK
2.4162%
14
CoinW
LINK-USDT$20.08
0.0061282 Eth
$4,803,277.00
239,189.070 LINK
2.1382%
15
BYDFi
LINK-USDT$20.07
0.0061356 Eth
$3,427,576.00
170,774.420 LINK
1.5266%
16
BTSE
LINK-USDT$20.07
0.0061344 Eth
$3,231,901.00
161,047.888 LINK
1.4397%
17
LBank
LINK-USDT$20.08
0.0061315 Eth
$2,945,423.00
146,668.140 LINK
1.3111%
18
LATOKEN
LINK-USDT$20.12
0.0061385 Eth
$2,923,589.00
145,341.511 LINK
1.2993%
19
Kraken
LINK-USD$20.08
0.0061306 Eth
$2,886,840.00
143,755.697 LINK
1.2851%
20
KuCoin
LINK-USDT$20.10
0.0061353 Eth
$2,498,017.00
124,293.124 LINK
1.1111%
21
QMall
LINK-USDT$20.08
0.0061313 Eth
$2,113,313.00
105,102.207 LINK
0.9396%
22
Dex-Trade
LINK-USDT$20.07
0.0061382 Eth
$1,986,738.00
98,966.070 LINK
0.8847%
23
FMCPAY
LINK-USDT$20.04
0.0061183 Eth
$1,765,738.00
88,074.594 LINK
0.7873%
24
Coinbase Exchange
LINK-GBP$20.08
0.0061303 Eth
$1,459,364.00
72,672.690 LINK
0.6497%
25
Biconomy.com
LINK-USDT$20.09
0.0061364 Eth
$1,399,875.00
69,751.580 LINK
0.6235%
26
Coinbase Exchange
LINK-ETH$20.05
0.0061227 Eth
$1,221,168.00
60,896.200 LINK
0.5444%
27
CoinEx
LINK-USDT$20.08
0.0061310 Eth
$1,219,773.00
60,724.088 LINK
0.5428%
28
FMCPAY
LINK-ETH$20.04
0.0061213 Eth
$1,082,629.00
53,631.840 LINK
0.4794%
29
FMCPAY
LINK-BTC$20.06
0.0061255 Eth
$973,537.00
48,433.900 LINK
0.4330%
30
Coinbase Exchange
LINK-EUR$20.11
0.0061388 Eth
$916,913.00
45,596.970 LINK
0.4076%
31
PointPay
LINK-USDT$20.05
0.0061224 Eth
$880,562.00
43,782.868 LINK
0.3914%
32
Coinbase Exchange
LINK-USDT$20.07
0.0061291 Eth
$850,016.00
42,351.767 LINK
0.3786%
33
FMFW.io
LINK-USDT$20.07
0.0061267 Eth
$781,291.00
38,928.730 LINK
0.3480%
34
tanX
LINK-USDC$20.09
0.0061325 Eth
$775,522.00
38,660.600 LINK
0.3456%
35
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.06
0.0061235 Eth
$753,451.00
37,350.279 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3339%
36
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.07
0.0061279 Eth
$615,033.00
30,495.512 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2726%
37
BigONE
LINK-USDT$20.12
0.0061442 Eth
$561,936.00
27,924.140 LINK
0.2496%
38
EXMO
LINK-USDT$20.08
0.0061321 Eth
$561,414.00
27,952.982 LINK
0.2499%
39
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.08
0.0061320 Eth
$533,756.00
39,164.266 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3501%
40
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.05
0.0061189 Eth
$513,994.00
25,457.371 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2276%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.06
0.0061217 Eth
$428,670.00
21,304.204 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1904%
42
Bitbegin
LINK-USDT$20.07
0.0061250 Eth
$419,697.00
20,915.096 LINK
0.1870%
43
OKX
LINK-USDC$20.06
0.0061224 Eth
$394,967.00
19,645.802 LINK
0.1756%
44
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.11
0.0061384 Eth
$377,105.00
376,575.559 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.3664%
45
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$20.14
0.0061476 Eth
$357,987.00
17,790.503 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1590%
46
Bitbank
LINK-JPY$20.10
0.0061376 Eth
$341,333.00
16,978.912 LINK
0.1518%
47
BitMart
LINK-BTC$20.11
0.0061386 Eth
$268,922.00
13,374.000 LINK
0.1196%
48
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.12
0.0061374 Eth
$261,726.00
261,497.092 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3376%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.12
0.0061374 Eth
$245,714.00
12,196.625 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1090%
50
Coinbase Exchange
LINK-BTC$20.08
0.0061321 Eth
$229,054.00
11,404.650 LINK
0.1020%
51
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.08
0.0061304 Eth
$224,606.00
11,154.733 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0997%
52
QMall
LINK-USDC$20.07
0.0061284 Eth
$215,703.00
10,728.169 LINK
0.0959%
53
Gemini
LINK-USD$20.05
0.0061187 Eth
$191,325.00
9,542.374 LINK
0.0853%
54
Bitci TR
LINK-TRY$20.04
0.0061258 Eth
$189,696.00
9,416.710 LINK
0.0842%
55
OKX
LINK-EUR$20.10
0.0061357 Eth
$159,117.00
7,889.397 LINK
0.0705%
56
Hotcoin
LINK-BTC$20.06
0.0061322 Eth
$145,179.00
7,237.740 LINK
0.0647%
57
GMO Japan
LINK-JPY$20.09
0.0061309 Eth
$142,334.00
7,084.600 LINK
0.0633%
58
Binance US
LINK-USDT$20.09
0.0061346 Eth
$115,028.00
5,724.983 LINK
0.0512%
59
LATOKEN
LINK-BTC$20.06
0.0061223 Eth
$110,952.00
5,530.377 LINK
0.0494%
60
BitMart
LINK-ETH$20.12
0.0061415 Eth
$86,051.00
4,277.440 LINK
0.0382%
61
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$20.14
0.0061435 Eth
$84,156.00
4,194.296 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0375%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.08
0.0061261 Eth
$73,881.00
3,658.134 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0327%
63
Mercado Bitcoin
LINK-BRL$20.12
0.0061432 Eth
$53,716.00
2,669.317 LINK
0.0239%
64
Hotcoin
LINK-ETH$20.06
0.0061273 Eth
$48,036.00
2,394.070 LINK
0.0214%
65
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.05
0.0061189 Eth
$46,663.00
46,678.005 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4173%
66
EXMO
LINK-BTC$20.17
0.0061554 Eth
$42,738.00
2,118.393 LINK
0.0189%
67
Bitkub
LINK-THB$20.06
0.0061258 Eth
$40,625.00
2,025.216 LINK
0.0181%
68
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$19.98
0.0061073 Eth
$38,779.00
1,931.456 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0173%
69
Bitso
LINK-USD$20.05
0.0061220 Eth
$37,732.00
1,881.689 LINK
0.0168%
70
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.08
0.0061301 Eth
$36,181.00
1,794.101 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0160%
71
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.07
0.0061220 Eth
$28,436.00
1,407.269 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0126%
72
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.05
0.0061207 Eth
$26,983.00
1,364.572 0X5947BB275C521040051D82396192181B413227A3
0.0122%
73
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$20.10
0.0061345 Eth
$20,350.00
1,012.004 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0090%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.12
0.0061374 Eth
$19,416.00
961.769 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0086%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$20.07
0.0061226 Eth
$18,251.12
910.227 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0081%
76
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$20.05
0.0061213 Eth
$13,555.35
17.826 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
77
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$20.15
0.0061524 Eth
$11,860.46
585.954 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0052%
78
Bitexen
LINK-TRY$19.94
0.0060958 Eth
$11,804.18
591.903 LINK
0.0053%
79
Dex-Trade
LINK-ETH$20.03
0.0061189 Eth
$11,543.06
576.360 LINK
0.0052%
80
CoinEx
LINK-USDC$20.04
0.0061172 Eth
$6,435.29
319.501 LINK
0.0029%
81
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.08
0.0061399 Eth
$4,512.44
4,508.702 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0403%
82
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.02
0.0061237 Eth
$4,077.92
4,080.379 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0365%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$20.12
0.0061374 Eth
$3,716.08
183.415 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0016%
84
CoinEx
LINK-BTC$20.04
0.0061188 Eth
$2,733.56
136.042 LINK
0.0012%
85
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061153 Eth
$2,627.30
3,529.977 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0316%
86
Ace
LINK-USDT$20.07
0.0061283 Eth
$2,467.17
123.020 LINK
0.0011%
87
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.04
0.0061191 Eth
$2,286.51
8.055 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0001%
88
KuCoin
LINK-KCS$20.02
0.0061117 Eth
$2,200.25
109.900 LINK
0.0010%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$19.94
0.0060984 Eth
$1,762.58
87.114 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0008%
90
Uniswap V3 (Arbitrum One)
0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.04
0.0061191 Eth
$1,494.15
382.410 0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8
0.0034%
91
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.03
0.0061171 Eth
$1,352.28
67.091 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$20.16
0.0061643 Eth
$1,260.53
62.177 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$20.00
0.0061086 Eth
$1,000.52
49.923 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.11
0.0061396 Eth
$964.72
47.915 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
95
Swapsicle
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.98
0.0061022 Eth
$898.80
45.661 0X5947BB275C521040051D82396192181B413227A3
0.0004%
96
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$20.06
0.0061353 Eth
$692.12
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0.0002%

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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