ETH Price: $3,268.65 (+0.74%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,492 ( -0.033%)

Market

Price

$20.09 @ 0.006146 ETH (+1.98%)

Onchain Market Cap

$20,090,000,000.00

Circulating Supply Market Cap

$12,675,023,852.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x81b76039e3dd7d5e5f44b7550813c11b73ae6476
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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 18163.64% |ETH 0.0003846 1498.02%

Market

Volume (24H):$549,172,110.00
Market Capitalization:$12,675,023,852.00
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$20.04
0.0061157 Eth
$56,730,574.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$19.99
0.0061174 Eth
$56,339,119.00
2,804,198.290 LINK
22.6203%
3
Coinbase Exchange
LINK-USD$20.04
0.0061202 Eth
$22,474,480.00
1,121,592.960 LINK
9.0474%
4
WEEX
LINK-USDT$20.04
0.0061165 Eth
$13,524,402.00
673,673.580 LINK
5.4342%
5
Bitget
LINK-USDT$19.99
0.0061137 Eth
$13,311,835.00
662,606.010 LINK
5.3450%
6
P2B
LINK-USDT$20.10
0.0061339 Eth
$12,286,837.00
611,264.840 LINK
4.9308%
7
Bybit
LINK-USDT$20.03
0.0061241 Eth
$11,201,374.00
557,351.627 LINK
4.4959%
8
HTX
LINK-USDT$19.99
0.0061163 Eth
$9,542,760.00
475,275.237 LINK
3.8338%
9
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.08
0.0061363 Eth
$8,224,534.00
66,081.250 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.5330%
10
BVOX
LINK-USDT$19.99
0.0061166 Eth
$7,873,084.00
391,979.200 LINK
3.1619%
11
DigiFinex
LINK-USDT$19.99
0.0061146 Eth
$6,777,461.00
338,971.180 LINK
2.7343%
12
XT.COM
LINK-USDT$20.03
0.0061134 Eth
$5,819,116.00
289,785.480 LINK
2.3376%
13
Azbit
LINK-USDT$20.03
0.0061184 Eth
$5,698,260.00
283,703.898 LINK
2.2885%
14
Deepcoin
LINK-USDT$20.02
0.0061186 Eth
$5,464,225.00
340,534.160 LINK
2.7469%
15
Coinstore
LINK-USDT$20.01
0.0061189 Eth
$5,421,025.00
270,279.570 LINK
2.1802%
16
OKX
LINK-USDT$19.98
0.0061139 Eth
$5,296,983.00
263,838.663 LINK
2.1283%
17
CoinW
LINK-USDT$20.03
0.0061175 Eth
$4,639,067.00
231,645.990 LINK
1.8686%
18
Hotcoin
LINK-USDT$20.07
0.0061229 Eth
$3,795,980.00
189,097.410 LINK
1.5254%
19
BYDFi
LINK-USDT$20.04
0.0061175 Eth
$3,258,995.00
162,612.930 LINK
1.3117%
20
Kraken
LINK-USD$20.04
0.0061317 Eth
$2,851,420.00
142,282.181 LINK
1.1477%
21
BTSE
LINK-USDT$20.01
0.0061168 Eth
$2,846,091.00
142,199.159 LINK
1.1471%
22
LBank
LINK-USDT$20.01
0.0061166 Eth
$2,796,635.00
139,764.620 LINK
1.1274%
23
LATOKEN
LINK-USDT$20.03
0.0061182 Eth
$2,774,894.00
138,527.519 LINK
1.1174%
24
KuCoin
LINK-USDT$19.99
0.0061127 Eth
$2,423,234.00
121,234.591 LINK
0.9779%
25
QMall
LINK-USDT$20.04
0.0061160 Eth
$2,117,369.00
105,347.758 LINK
0.8498%
26
Dex-Trade
LINK-USDT$20.05
0.0061245 Eth
$1,863,992.00
92,967.570 LINK
0.7499%
27
FMCPAY
LINK-USDT$20.00
0.0061168 Eth
$1,717,601.00
85,609.794 LINK
0.6906%
28
Coinbase Exchange
LINK-GBP$20.04
0.0061259 Eth
$1,460,042.00
72,839.310 LINK
0.5876%
29
Biconomy.com
LINK-USDT$20.09
0.0061364 Eth
$1,399,875.00
69,751.580 LINK
0.5627%
30
Coinbase Exchange
LINK-ETH$20.05
0.0061260 Eth
$1,224,066.00
61,036.160 LINK
0.4924%
31
CoinEx
LINK-USDT$20.06
0.0061192 Eth
$1,210,947.00
60,275.716 LINK
0.4862%
32
FMCPAY
LINK-ETH$20.03
0.0061247 Eth
$1,072,760.00
53,194.880 LINK
0.4291%
33
FMCPAY
LINK-BTC$20.00
0.0061155 Eth
$967,978.00
48,205.600 LINK
0.3889%
34
Coinbase Exchange
LINK-EUR$20.07
0.0061331 Eth
$916,484.00
45,668.820 LINK
0.3684%
35
PointPay
LINK-USDT$20.04
0.0061215 Eth
$884,700.00
43,994.325 LINK
0.3549%
36
Coinbase Exchange
LINK-USDT$20.07
0.0061339 Eth
$850,022.00
42,351.767 LINK
0.3416%
37
tanX
LINK-USDC$20.04
0.0061244 Eth
$776,959.00
38,739.720 LINK
0.3125%
38
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.03
0.0061234 Eth
$742,878.00
36,860.448 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2973%
39
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.03
0.0061271 Eth
$621,476.00
30,880.297 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2491%
40
Trubit
LINK-USDT$20.02
0.0061223 Eth
$581,525.00
28,952.830 LINK
0.2335%
41
EXMO
LINK-USDT$20.02
0.0061183 Eth
$540,270.00
26,987.139 LINK
0.2177%
42
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.01
0.0061157 Eth
$531,868.00
39,164.266 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3159%
43
BigONE
LINK-USDT$20.05
0.0061269 Eth
$518,560.00
25,865.860 LINK
0.2086%
44
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.03
0.0061175 Eth
$509,763.00
25,276.424 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2039%
45
Bitstamp
LINK-EUR$20.06
0.0061340 Eth
$503,018.00
25,078.438 LINK
0.2023%
46
Bitstamp
LINK-USD$20.00
0.0061164 Eth
$471,135.00
23,556.738 LINK
0.1900%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.14
0.0061506 Eth
$423,771.00
20,971.708 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1692%
48
OKX
LINK-USDC$20.01
0.0061235 Eth
$381,117.00
18,938.531 LINK
0.1528%
49
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.03
0.0061292 Eth
$368,774.00
369,770.846 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.9828%
50
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$20.03
0.0061175 Eth
$350,730.00
17,527.300 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1414%
51
Bitbank
LINK-JPY$20.10
0.0061405 Eth
$309,679.00
15,404.310 LINK
0.1243%
52
BitMart
LINK-BTC$20.03
0.0061245 Eth
$264,619.00
13,213.440 LINK
0.1066%
53
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.14
0.0061506 Eth
$257,644.00
257,257.376 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.0752%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.14
0.0061506 Eth
$246,740.00
12,165.179 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0981%
55
Coinbase Exchange
LINK-BTC$20.04
0.0061207 Eth
$229,064.00
11,431.900 LINK
0.0922%
56
QMall
LINK-USDC$20.05
0.0061184 Eth
$225,569.00
11,212.309 LINK
0.0904%
57
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.11
0.0061535 Eth
$219,914.00
10,920.345 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0881%
58
Bitci TR
LINK-TRY$20.22
0.0061856 Eth
$189,928.00
9,425.980 LINK
0.0760%
59
BitDelta
LINK-USDT$20.03
0.0061134 Eth
$189,591.00
9,452.000 LINK
0.0762%
60
Gemini
LINK-USD$20.05
0.0061325 Eth
$187,487.00
9,349.643 LINK
0.0754%
61
OKX
LINK-EUR$20.00
0.0061182 Eth
$158,603.00
7,863.130 LINK
0.0634%
62
Hotcoin
LINK-BTC$20.06
0.0061322 Eth
$145,179.00
7,237.740 LINK
0.0584%
63
Binance US
LINK-USDT$20.09
0.0061411 Eth
$114,149.00
5,682.006 LINK
0.0458%
64
BitMart
LINK-ETH$20.03
0.0061263 Eth
$85,588.00
4,272.440 LINK
0.0345%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$20.14
0.0061506 Eth
$82,541.00
4,112.460 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0332%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.06
0.0061287 Eth
$72,230.00
3,576.401 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0288%
67
Hotcoin
LINK-ETH$20.07
0.0061222 Eth
$46,983.00
2,340.730 LINK
0.0189%
68
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.03
0.0061175 Eth
$45,894.00
45,976.030 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3709%
69
Bitso
LINK-USD$20.02
0.0061154 Eth
$37,025.00
1,849.307 LINK
0.0149%
70
EXMO
LINK-BTC$20.05
0.0061279 Eth
$36,950.00
1,842.825 LINK
0.0149%
71
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.07
0.0061356 Eth
$36,147.00
1,792.940 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0145%
72
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$20.01
0.0061167 Eth
$35,618.00
1,769.711 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0143%
73
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.04
0.0061219 Eth
$28,402.00
1,407.269 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0114%
74
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.01
0.0061157 Eth
$26,909.00
1,364.672 0X5947BB275C521040051D82396192181B413227A3
0.0110%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.14
0.0061506 Eth
$19,635.89
971.317 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0078%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$20.07
0.0061296 Eth
$17,919.42
893.435 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0072%
77
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$20.05
0.0061335 Eth
$13,070.65
17.193 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
78
Bitexen
LINK-TRY$19.91
0.0060825 Eth
$11,787.46
591.903 LINK
0.0048%
79
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$20.01
0.0061157 Eth
$11,779.34
585.954 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0047%
80
Dex-Trade
LINK-ETH$20.05
0.0061265 Eth
$11,258.85
561.630 LINK
0.0045%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.01
0.0061150 Eth
$8,655.37
430.327 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0035%
82
CoinEx
LINK-USDC$20.04
0.0061172 Eth
$6,435.29
319.501 LINK
0.0026%
83
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$20.11
0.0061418 Eth
$5,527.55
274.599 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0022%
84
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.14
0.0061488 Eth
$4,383.06
4,369.917 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0353%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.04
0.0061139 Eth
$4,052.37
4,053.565 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0327%
86
CoinEx
LINK-BTC$19.97
0.0061106 Eth
$2,697.04
134.425 LINK
0.0011%
87
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.04
0.0061139 Eth
$2,632.53
3,529.977 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0285%
88
Ace
LINK-USDT$20.03
0.0061166 Eth
$2,385.75
118.850 LINK
0.0010%
89
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061182 Eth
$2,281.01
8.055 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0001%
90
Uniswap V3 (Arbitrum One)
0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.00
0.0061182 Eth
$1,490.55
382.410 0X0C880F6761F1AF8D9AA9C466984B80DAB9A8C9E8
0.0031%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$20.23
0.0061790 Eth
$1,265.00
62.177 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
92
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.02
0.0061247 Eth
$1,211.94
60.128 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
93
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.22
0.0061850 Eth
$1,129.51
3.940 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0000%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$20.10
0.0061504 Eth
$935.35
46.396 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
95
Swapsicle
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.97
0.0061025 Eth
$898.04
45.661 0X5947BB275C521040051D82396192181B413227A3
0.0004%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.11
0.0061461 Eth
$852.33
42.282 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
97
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$20.20
0.0061638 Eth
$696.74
34.862 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$20.13
0.0061411 Eth
$564.46
28.113 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.13
0.0061425 Eth
$532.61
26.291 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$20.07
0.0061214 Eth
$344.32
17.214 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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