ETH Price: $2,827.61 (+2.32%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,926 ( 0.071%)

Market

Price

$17.60 @ 0.006224 ETH (-1.01%)

Onchain Market Cap

$17,600,000,000.00

Circulating Supply Market Cap

$11,223,072,242.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
13,500.12535846 LINK

Value
$237,602.21 ( ~84.0292 Eth) [0.0014%]
0x33e09e240fe930895e69c9e34c3e07271ee53366
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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 15900% |ETH 0.0003846 1518.3%

Market

Volume (24H):$311,501,920.00
Market Capitalization:$11,223,072,242.00
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$17.64
0.0062363 Eth
$33,558,440.00
1,902,647.450 LINK
17.0551%
2
Binance
LINK-USDT$17.66
0.0062568 Eth
$30,517,086.00
1,718,771.720 LINK
15.4069%
3
MEXC
LINK-USDT$17.63
0.0062494 Eth
$18,248,525.00
1,035,088.220 LINK
9.2784%
4
HTX
LINK-USDT$17.66
0.0062454 Eth
$11,993,806.00
676,891.391 LINK
6.0676%
5
Coinbase Exchange
LINK-USD$17.66
0.0062435 Eth
$8,565,215.00
485,088.920 LINK
4.3483%
6
Bybit
LINK-USDT$17.66
0.0062458 Eth
$7,097,636.00
399,783.341 LINK
3.5836%
7
P2B
LINK-USDT$17.63
0.0062460 Eth
$6,616,079.00
375,292.210 LINK
3.3641%
8
Ourbit
LINK-USDT$17.62
0.0062443 Eth
$6,604,182.00
372,406.220 LINK
3.3382%
9
BVOX
LINK-USDT$17.58
0.0062323 Eth
$4,761,035.00
268,534.220 LINK
2.4071%
10
Bitget
LINK-USDT$17.65
0.0062413 Eth
$4,738,103.00
266,716.739 LINK
2.3908%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.54
0.0062025 Eth
$4,017,540.00
224,034.034 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.0082%
12
DigiFinex
LINK-USDT$17.66
0.0062447 Eth
$3,686,706.00
208,786.690 LINK
1.8715%
13
OKX
LINK-USDT$17.66
0.0062455 Eth
$3,048,692.00
171,587.518 LINK
1.5381%
14
FameEX
LINK-USDT$17.52
0.0062107 Eth
$3,037,713.00
171,281.751 LINK
1.5354%
15
MEXC
LINK-EUR$17.61
0.0062424 Eth
$3,032,573.00
172,215.510 LINK
1.5437%
16
XT.COM
LINK-USDT$17.63
0.0062460 Eth
$3,010,943.00
169,806.910 LINK
1.5221%
17
MEXC
LINK-USDC$17.65
0.0062404 Eth
$2,923,639.00
165,662.010 LINK
1.4850%
18
Binance
LINK-FDUSD$17.68
0.0062578 Eth
$2,715,034.00
152,967.070 LINK
1.3712%
19
LBank
LINK-USDT$17.67
0.0062484 Eth
$2,698,870.00
152,754.160 LINK
1.3693%
20
KuCoin
LINK-USDT$17.66
0.0062451 Eth
$2,565,705.00
145,293.703 LINK
1.3024%
21
Gate.io
LINK-USDT$17.69
0.0062530 Eth
$2,207,380.00
124,509.600 LINK
1.1161%
22
BTSE
LINK-USDT$17.65
0.0062475 Eth
$2,181,678.00
123,575.284 LINK
1.1077%
23
Azbit
LINK-USDT$17.60
0.0062353 Eth
$1,881,808.00
106,127.054 LINK
0.9513%
24
Bitunix
LINK-USDT$17.65
0.0062468 Eth
$1,761,250.00
99,828.670 LINK
0.8949%
25
BYDFi
LINK-USDT$17.62
0.0062408 Eth
$1,685,657.00
95,669.220 LINK
0.8576%
26
Toobit
LINK-USDT$17.65
0.0062472 Eth
$1,500,626.00
84,567.050 LINK
0.7580%
27
FMCPAY
LINK-USDT$17.64
0.0062436 Eth
$1,489,495.00
84,042.294 LINK
0.7533%
28
LATOKEN
LINK-USDT$17.62
0.0062408 Eth
$1,431,320.00
81,234.377 LINK
0.7282%
29
Biconomy.com
LINK-USDT$17.59
0.0062340 Eth
$1,120,931.00
63,208.470 LINK
0.5666%
30
Kraken
LINK-USD$17.66
0.0062437 Eth
$991,677.00
56,161.638 LINK
0.5034%
31
Dex-Trade
LINK-USDT$17.65
0.0062409 Eth
$981,254.00
55,596.646 LINK
0.4984%
32
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.67
0.0062479 Eth
$899,171.00
50,118.416 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4493%
33
FMCPAY
LINK-ETH$17.64
0.0062444 Eth
$889,998.00
49,656.960 LINK
0.4451%
34
CoinEx
LINK-USDT$17.66
0.0062438 Eth
$817,029.00
46,030.416 LINK
0.4126%
35
FMCPAY
LINK-BTC$17.60
0.0062392 Eth
$782,178.00
44,132.600 LINK
0.3956%
36
Bitvavo
LINK-EUR$17.62
0.0062308 Eth
$696,217.00
39,507.537 LINK
0.3541%
37
tanX
LINK-USDC$17.65
0.0062418 Eth
$636,505.00
35,898.720 LINK
0.3218%
38
Coinbase Exchange
LINK-EUR$17.58
0.0062219 Eth
$510,287.00
29,024.060 LINK
0.2602%
39
Azbit
LINK-ETH$17.65
0.0062409 Eth
$447,890.00
24,928.880 LINK
0.2235%
40
Coinbase Exchange
LINK-GBP$17.65
0.0062462 Eth
$396,589.00
22,469.280 LINK
0.2014%
41
Pionex
LINK-USDT$17.63
0.0062455 Eth
$393,118.00
22,166.910 LINK
0.1987%
42
BigONE
LINK-USDT$17.72
0.0062712 Eth
$341,307.00
19,264.620 LINK
0.1727%
43
BitMart
LINK-BTC$17.66
0.0062447 Eth
$278,380.00
15,763.000 LINK
0.1413%
44
WhiteBIT
LINK-BTC$17.62
0.0062399 Eth
$277,158.00
15,732.420 LINK
0.1410%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.59
0.0062244 Eth
$266,171.00
14,998.754 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1344%
46
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.63
0.0062380 Eth
$225,462.00
226,715.257 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.0322%
47
LATOKEN
LINK-BTC$17.62
0.0062417 Eth
$213,308.00
12,106.746 LINK
0.1085%
48
Bitbank
LINK-JPY$17.74
0.0062759 Eth
$203,545.00
11,476.989 LINK
0.1029%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.63
0.0062380 Eth
$187,398.00
10,442.041 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0936%
50
Bitci TR
LINK-TRY$17.72
0.0062719 Eth
$185,402.00
10,439.260 LINK
0.0936%
51
BitStorage
LINK-ETH$17.63
0.0062373 Eth
$180,090.00
10,217.180 LINK
0.0916%
52
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.56
0.0062097 Eth
$176,979.00
19,757.055 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1771%
53
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.56
0.0062129 Eth
$175,696.00
9,797.789 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0878%
54
Slex
LINK-ETH$17.65
0.0062464 Eth
$170,243.00
9,550.260 LINK
0.0856%
55
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.68
0.0062542 Eth
$157,725.00
8,884.922 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0796%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.55
0.0062108 Eth
$139,669.00
7,916.959 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0710%
57
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.62
0.0062349 Eth
$114,779.00
6,364.478 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0571%
58
Bybit
LINK-USDC$17.52
0.0061957 Eth
$103,370.00
5,868.728 LINK
0.0526%
59
Coinbase Exchange
LINK-ETH$17.71
0.0062619 Eth
$97,905.00
5,528.580 LINK
0.0496%
60
Hotcoin
LINK-BTC$17.65
0.0062461 Eth
$90,916.00
5,152.310 LINK
0.0462%
61
BitMart
LINK-ETH$17.65
0.0062412 Eth
$88,180.00
4,995.520 LINK
0.0448%
62
BYDFi
LINK-USDC$17.52
0.0062106 Eth
$79,696.00
4,548.760 LINK
0.0408%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.62
0.0062352 Eth
$73,647.00
4,112.891 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0369%
64
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.66
0.0062425 Eth
$72,904.00
4,110.905 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0368%
65
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.60
0.0062257 Eth
$46,770.00
2,631.035 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0236%
66
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.67
0.0062479 Eth
$46,758.00
47,015.867 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4214%
67
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.54
0.0062085 Eth
$46,156.00
2,582.168 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0231%
68
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.56
0.0062083 Eth
$39,945.00
40,397.005 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3621%
69
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.63
0.0062380 Eth
$34,797.00
1,970.066 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0177%
70
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.61
0.0062269 Eth
$26,335.00
1,466.577 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0131%
71
Dex-Trade
LINK-ETH$17.56
0.0062212 Eth
$23,413.00
1,333.000 LINK
0.0119%
72
EXMO
LINK-BTC$17.64
0.0062392 Eth
$21,982.00
1,245.808 LINK
0.0112%
73
Indodax
LINK-IDR$17.58
0.0062222 Eth
$21,895.00
1,245.265 LINK
0.0112%
74
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.47
0.0061832 Eth
$21,195.00
1,216.310 0X5947BB275C521040051D82396192181B413227A3
0.0109%
75
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.67
0.0062480 Eth
$17,537.04
17,610.444 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1579%
76
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.56
0.0062097 Eth
$12,705.92
716.756 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0064%
77
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.60
0.0062266 Eth
$10,992.10
618.756 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0055%
78
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.58
0.0062176 Eth
$8,918.96
504.863 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0045%
79
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.61
0.0062407 Eth
$7,167.09
7,210.165 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0646%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.56
0.0062203 Eth
$6,434.30
362.574 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0033%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.66
0.0062476 Eth
$5,890.65
328.149 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0029%
82
Bitexen
LINK-TRY$17.50
0.0061895 Eth
$4,714.77
269.391 LINK
0.0024%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$17.65
0.0062462 Eth
$4,693.85
264.466 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0024%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.65
0.0062581 Eth
$4,143.40
4,167.351 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0374%
85
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.56
0.0062128 Eth
$4,021.05
227.130 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0020%
86
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.51
0.0061964 Eth
$3,979.70
482.414 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0043%
87
CoinEx
LINK-USDC$17.60
0.0062368 Eth
$3,813.49
215.740 LINK
0.0019%
88
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$17.54
0.0062074 Eth
$3,407.52
192.353 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0017%
89
Uniswap V4 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.56
0.0062083 Eth
$3,100.51
3,135.040 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0281%
90
CoinEx
LINK-BTC$17.71
0.0062631 Eth
$3,034.24
170.222 LINK
0.0015%
91
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.59
0.0062235 Eth
$2,387.93
132.798 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0012%
92
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.53
0.0062033 Eth
$2,385.32
9.758 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0001%
93
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.58
0.0062339 Eth
$1,041.91
58.110 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
94
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.55
0.0062101 Eth
$972.28
52.848 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0005%
95
KuCoin
LINK-KCS$17.57
0.0062142 Eth
$841.55
47.893 LINK
0.0004%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$17.60
0.0062281 Eth
$821.79
46.138 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
97
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XD036414FA2BCBB802691491E323BFF1348C5F4BA$17.66
0.0062604 Eth
$787.90
44.172 0X5947BB275C521040051D82396192181B413227A3
0.0004%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$17.60
0.0062280 Eth
$705.24
39.196 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$17.58
0.0062205 Eth
$677.29
37.970 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
100
Osmosis
IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049-UOSMO$17.66
0.0062464 Eth
$320.30
18.134 IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049
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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