ETH Price: $3,278.84 (+1.04%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,741 (0.00%)

Market

Price

$20.11 @ 0.006136 ETH (+0.27%)

Onchain Market Cap

$20,110,000,000.00

Circulating Supply Market Cap

$12,676,312,262.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
25.23627957 LINK

Value
$507.50 ( ~0.154780352831467 Eth) [0.0000%]
0x5c9AF236817CA5cE28967d074B4371D7b05Cc3aB
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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 18181.82% |ETH 0.0003846 1495.42%

Market

Volume (24H):$489,572,780.00
Market Capitalization:$12,676,312,262.00
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$20.16
0.0061452 Eth
$56,300,585.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$20.16
0.0061459 Eth
$52,591,462.00
2,615,209.100 LINK
23.8120%
3
Coinbase Exchange
LINK-USD$20.16
0.0061503 Eth
$20,321,469.00
1,008,059.400 LINK
9.1786%
4
WEEX
LINK-USDT$20.16
0.0061512 Eth
$12,234,748.00
609,194.180 LINK
5.5468%
5
P2B
LINK-USDT$20.15
0.0061420 Eth
$11,286,940.00
560,121.290 LINK
5.1000%
6
BVOX
LINK-USDT$20.17
0.0061453 Eth
$7,712,264.00
383,831.330 LINK
3.4949%
7
Bybit
LINK-USDT$20.16
0.0061491 Eth
$7,169,230.00
356,814.974 LINK
3.2489%
8
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.08
0.0061263 Eth
$7,165,019.00
354,981.927 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.2322%
9
HTX
LINK-USDT$20.15
0.0061493 Eth
$6,543,343.00
326,762.178 LINK
2.9752%
10
DigiFinex
LINK-USDT$20.16
0.0061518 Eth
$6,376,757.00
316,265.560 LINK
2.8797%
11
Deepcoin
LINK-USDT$20.15
0.0061446 Eth
$5,432,827.00
273,429.097 LINK
2.4896%
12
OKX
LINK-USDT$20.15
0.0061470 Eth
$5,345,167.00
265,964.221 LINK
2.4217%
13
XT.COM
LINK-USDT$20.06
0.0061259 Eth
$5,252,286.00
261,177.660 LINK
2.3781%
14
Azbit
LINK-USDT$20.15
0.0061439 Eth
$5,242,341.00
260,695.688 LINK
2.3737%
15
Coinstore
LINK-USDT$20.15
0.0061429 Eth
$4,886,592.00
243,053.210 LINK
2.2130%
16
CoinW
LINK-USDT$20.19
0.0061549 Eth
$4,303,749.00
213,178.020 LINK
1.9410%
17
Gate.io
LINK-USDT$20.15
0.0061467 Eth
$4,280,683.00
211,856.160 LINK
1.9290%
18
Bitunix
LINK-USDT$20.14
0.0061430 Eth
$3,815,274.00
189,350.340 LINK
1.7241%
19
Toobit
LINK-USDT$20.16
0.0061512 Eth
$3,361,719.00
167,164.100 LINK
1.5221%
20
BYDFi
LINK-USDT$20.15
0.0061416 Eth
$2,945,330.00
146,173.310 LINK
1.3309%
21
LBank
LINK-USDT$20.09
0.0061233 Eth
$2,603,848.00
129,603.120 LINK
1.1801%
22
KuCoin
LINK-USDT$20.15
0.0061472 Eth
$2,568,660.00
127,482.401 LINK
1.1608%
23
LATOKEN
LINK-USDT$20.17
0.0061483 Eth
$2,517,516.00
124,834.986 LINK
1.1366%
24
QMall
LINK-USDT$20.15
0.0061411 Eth
$2,124,930.00
105,665.780 LINK
0.9621%
25
FMCPAY
LINK-USDT$20.15
0.0061479 Eth
$1,943,096.00
96,687.192 LINK
0.8804%
26
Dex-Trade
LINK-USDT$20.16
0.0061451 Eth
$1,752,641.00
86,932.750 LINK
0.7915%
27
Hotcoin
LINK-USDT$20.15
0.0061420 Eth
$1,690,283.00
83,881.300 LINK
0.7638%
28
BTSE
LINK-USDT$20.15
0.0061439 Eth
$1,629,224.00
80,859.151 LINK
0.7362%
29
Coinbase Exchange
LINK-ETH$20.16
0.0061424 Eth
$1,576,787.00
78,229.130 LINK
0.7123%
30
Biconomy.com
LINK-USDT$20.15
0.0061404 Eth
$1,377,316.00
68,640.100 LINK
0.6250%
31
Bitvavo
LINK-EUR$20.10
0.0061256 Eth
$1,143,558.00
56,905.506 LINK
0.5181%
32
FMCPAY
LINK-ETH$20.16
0.0061469 Eth
$1,035,887.00
51,423.840 LINK
0.4682%
33
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.15
0.0061442 Eth
$1,014,564.00
50,338.551 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.4583%
34
FMCPAY
LINK-BTC$20.14
0.0061455 Eth
$1,005,640.00
50,102.100 LINK
0.4562%
35
Coinbase Exchange
LINK-GBP$20.17
0.0061483 Eth
$939,682.00
46,595.540 LINK
0.4243%
36
Coinbase Exchange
LINK-EUR$20.16
0.0061463 Eth
$901,049.00
44,694.120 LINK
0.4069%
37
PointPay
LINK-USDT$20.15
0.0061411 Eth
$822,363.00
40,886.793 LINK
0.3723%
38
CoinEx
LINK-USDT$20.14
0.0061459 Eth
$762,085.00
38,015.384 LINK
0.3461%
39
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.18
0.0061549 Eth
$593,249.00
29,415.244 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2678%
40
EXMO
LINK-USDT$20.15
0.0061441 Eth
$507,002.00
25,164.133 LINK
0.2291%
41
Bitbegin
LINK-USDT$20.15
0.0061439 Eth
$434,703.00
21,663.739 LINK
0.1973%
42
Bitbank
LINK-JPY$20.14
0.0061398 Eth
$424,597.00
21,078.637 LINK
0.1919%
43
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.08
0.0061267 Eth
$330,446.00
24,169.439 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2201%
44
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.14
0.0061435 Eth
$316,110.00
15,559.571 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1417%
45
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.19
0.0061570 Eth
$311,377.00
310,914.080 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.8309%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.19
0.0061595 Eth
$285,301.00
14,133.397 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1287%
47
BitMart
LINK-BTC$20.17
0.0061500 Eth
$275,481.00
13,659.720 LINK
0.1244%
48
BigONE
LINK-USDT$20.08
0.0061269 Eth
$254,980.00
12,696.730 LINK
0.1156%
49
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$20.18
0.0061578 Eth
$239,384.00
11,917.206 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1085%
50
OKX
LINK-USDC$20.16
0.0061500 Eth
$238,086.00
11,874.636 LINK
0.1081%
51
QMall
LINK-USDC$20.15
0.0061471 Eth
$220,902.00
10,956.107 LINK
0.0998%
52
Gemini
LINK-USD$20.16
0.0061516 Eth
$207,117.00
10,271.969 LINK
0.0935%
53
Bitci TR
LINK-TRY$20.18
0.0061569 Eth
$196,577.00
9,766.544 LINK
0.0889%
54
Coinbase Exchange
LINK-BTC$20.17
0.0061455 Eth
$195,855.00
9,712.380 LINK
0.0884%
55
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.19
0.0061601 Eth
$181,951.00
181,911.617 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.6563%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.20
0.0061622 Eth
$176,232.00
8,731.033 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0795%
57
Slex
LINK-ETH$20.13
0.0061359 Eth
$167,084.00
8,301.930 LINK
0.0756%
58
BitStorage
LINK-ETH$20.17
0.0061483 Eth
$161,418.00
8,004.370 LINK
0.0729%
59
OKX
LINK-EUR$20.10
0.0061319 Eth
$157,313.00
7,804.225 LINK
0.0711%
60
GMO Japan
LINK-JPY$20.24
0.0061731 Eth
$148,467.00
7,334.300 LINK
0.0668%
61
Binance US
LINK-USDT$20.08
0.0061232 Eth
$107,144.00
5,336.006 LINK
0.0486%
62
Gemini
LINK-BTC$20.09
0.0061305 Eth
$103,839.00
5,167.625 LINK
0.0471%
63
KuCoin
LINK-USDC$20.06
0.0061192 Eth
$87,265.00
4,350.798 LINK
0.0396%
64
BitMart
LINK-ETH$20.17
0.0061497 Eth
$86,989.00
4,313.600 LINK
0.0393%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.16
0.0061516 Eth
$60,134.00
2,976.393 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0271%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$20.19
0.0061595 Eth
$59,081.00
2,928.901 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0267%
67
Hotcoin
LINK-BTC$20.18
0.0061525 Eth
$56,159.00
2,782.660 LINK
0.0253%
68
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$20.17
0.0061502 Eth
$49,370.00
2,452.146 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0223%
69
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.13
0.0061391 Eth
$47,207.00
2,349.277 0X5947BB275C521040051D82396192181B413227A3
0.0214%
70
EXMO
LINK-BTC$20.18
0.0061527 Eth
$43,911.00
2,176.431 LINK
0.0198%
71
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.11
0.0061348 Eth
$38,616.00
1,915.928 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0174%
72
Bitexen
LINK-TRY$20.03
0.0061035 Eth
$33,737.00
1,684.540 LINK
0.0153%
73
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$20.09
0.0061251 Eth
$31,250.00
1,548.408 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0141%
74
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.17
0.0061478 Eth
$29,818.00
1,472.927 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0134%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.19
0.0061595 Eth
$27,980.00
1,373.496 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0125%
76
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.19
0.0061543 Eth
$27,091.00
26,994.654 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2458%
77
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.14
0.0061461 Eth
$22,060.00
1,093.001 0X5947BB275C521040051D82396192181B413227A3
0.0100%
78
Dex-Trade
LINK-ETH$20.08
0.0061280 Eth
$20,566.00
1,024.110 LINK
0.0093%
79
Hotcoin
LINK-ETH$20.17
0.0061471 Eth
$18,235.62
904.210 LINK
0.0082%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$20.18
0.0061560 Eth
$13,504.86
670.222 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0061%
81
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$20.18
0.0061536 Eth
$12,797.79
16.719 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
82
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.13
0.0061396 Eth
$12,505.52
619.855 0X5947BB275C521040051D82396192181B413227A3
0.0056%
83
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$20.13
0.0061427 Eth
$8,347.66
412.537 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0038%
84
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.17
0.0061477 Eth
$7,927.07
393.081 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0036%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$20.08
0.0061250 Eth
$4,839.46
239.785 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0022%
86
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.04
0.0061108 Eth
$3,629.33
3,637.778 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0331%
87
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.19
0.0061537 Eth
$3,156.51
3,142.635 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0286%
88
CoinEx
LINK-BTC$20.10
0.0061327 Eth
$2,334.48
116.670 LINK
0.0011%
89
CoinEx
LINK-USDC$20.10
0.0061320 Eth
$2,202.05
109.929 LINK
0.0010%
90
Lydia Finance
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.16
0.0061512 Eth
$1,491.51
74.356 0X5947BB275C521040051D82396192181B413227A3
0.0007%
91
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.23
0.0061722 Eth
$1,485.19
64.882 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0006%
92
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.13
0.0061453 Eth
$1,397.79
69.193 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
93
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.07
0.0061170 Eth
$1,342.75
66.556 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0006%
94
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$20.04
0.0061100 Eth
$844.83
42.078 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0004%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$20.18
0.0061552 Eth
$754.22
37.345 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.15
0.0061522 Eth
$619.44
30.683 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$20.07
0.0061170 Eth
$532.25
26.532 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$20.16
0.0061544 Eth
$433.40
21.468 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$20.12
0.0061335 Eth
$218.25
10.861 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
100
Dfyn
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC168E40227E4EBD8C1CAE80F7A55A4F0E6D66C97$20.10
0.0061301 Eth
$98.35
4.595 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0000%

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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