ETH Price: $2,806.11 (+1.28%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,837 ( 0.056%)

Market

Price

$17.53 @ 0.006247 ETH (-1.83%)

Onchain Market Cap

$17,530,000,000.00

Circulating Supply Market Cap

$11,195,000,904.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x970a11c52e50970f2ea42633b8ceb08904d8983e
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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 15836.36% |ETH 0.0003846 1524.28%

Market

Volume (24H):$309,496,715.00
Market Capitalization:$11,195,000,904.00
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
Websea
LINK-USDT$17.54
0.0062465 Eth
$31,668,254.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$17.53
0.0062448 Eth
$30,481,976.00
1,715,786.300 LINK
18.5036%
3
MEXC
LINK-USDT$17.53
0.0062480 Eth
$18,164,728.00
1,035,989.240 LINK
11.1725%
4
HTX
LINK-USDT$17.53
0.0062430 Eth
$11,835,319.00
666,269.247 LINK
7.1853%
5
Coinbase Exchange
LINK-USD$17.52
0.0062423 Eth
$7,938,191.00
453,222.420 LINK
4.8877%
6
Bybit
LINK-USDT$17.53
0.0062445 Eth
$7,565,028.00
425,619.860 LINK
4.5900%
7
Ourbit
LINK-USDT$17.51
0.0062380 Eth
$6,510,298.00
366,440.600 LINK
3.9518%
8
P2B
LINK-USDT$17.54
0.0062421 Eth
$6,493,228.00
370,160.690 LINK
3.9919%
9
WEEX
LINK-USDT$17.52
0.0062373 Eth
$5,836,941.00
328,405.767 LINK
3.5416%
10
BVOX
LINK-USDT$17.57
0.0062472 Eth
$5,145,609.00
289,491.280 LINK
3.1220%
11
Bitget
LINK-USDT$17.52
0.0062407 Eth
$5,104,478.00
286,947.698 LINK
3.0945%
12
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.63
0.0062787 Eth
$3,716,712.00
207,295.782 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.2355%
13
DigiFinex
LINK-USDT$17.53
0.0062451 Eth
$3,640,702.00
207,631.400 LINK
2.2392%
14
OKX
LINK-USDT$17.53
0.0062446 Eth
$3,066,589.00
172,351.741 LINK
1.8587%
15
FameEX
LINK-USDT$17.52
0.0062398 Eth
$3,028,972.00
170,513.929 LINK
1.8389%
16
XT.COM
LINK-USDT$17.56
0.0062508 Eth
$3,020,823.00
170,041.750 LINK
1.8338%
17
MEXC
LINK-EUR$17.57
0.0062511 Eth
$3,020,269.00
171,912.240 LINK
1.8540%
18
MEXC
LINK-USDC$17.54
0.0062506 Eth
$2,908,025.00
165,783.800 LINK
1.7879%
19
LBank
LINK-USDT$17.53
0.0062448 Eth
$2,678,986.00
152,790.270 LINK
1.6477%
20
KuCoin
LINK-USDT$17.54
0.0062483 Eth
$2,426,720.00
138,327.053 LINK
1.4918%
21
Gate.io
LINK-USDT$17.53
0.0062431 Eth
$2,340,464.00
131,866.760 LINK
1.4221%
22
BTSE
LINK-USDT$17.53
0.0062426 Eth
$2,072,422.00
118,249.244 LINK
1.2752%
23
Azbit
LINK-USDT$17.52
0.0062444 Eth
$1,859,919.00
104,694.463 LINK
1.1291%
24
Bitunix
LINK-USDT$17.54
0.0062464 Eth
$1,764,353.00
100,577.180 LINK
1.0847%
25
BYDFi
LINK-USDT$17.52
0.0062440 Eth
$1,674,051.00
95,551.870 LINK
1.0305%
26
Toobit
LINK-USDT$17.51
0.0062402 Eth
$1,497,142.00
84,213.890 LINK
0.9082%
27
FMCPAY
LINK-USDT$17.52
0.0062416 Eth
$1,464,617.00
82,460.746 LINK
0.8893%
28
Kraken
LINK-USD$17.53
0.0062428 Eth
$1,181,820.00
67,421.609 LINK
0.7271%
29
Biconomy.com
LINK-USDT$17.53
0.0062404 Eth
$1,120,412.00
63,016.110 LINK
0.6796%
30
Dex-Trade
LINK-USDT$17.53
0.0062482 Eth
$969,767.00
55,311.176 LINK
0.5965%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.60
0.0062703 Eth
$948,931.00
53,104.179 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5727%
32
FMCPAY
LINK-ETH$17.51
0.0062378 Eth
$889,146.00
49,702.560 LINK
0.5360%
33
CoinEx
LINK-USDT$17.54
0.0062488 Eth
$838,626.00
47,191.919 LINK
0.5089%
34
FMCPAY
LINK-BTC$17.53
0.0062421 Eth
$763,040.00
43,131.700 LINK
0.4651%
35
Bitvavo
LINK-EUR$17.54
0.0062484 Eth
$740,496.00
42,208.387 LINK
0.4552%
36
tanX
LINK-USDC$17.52
0.0062423 Eth
$621,946.00
34,986.340 LINK
0.3773%
37
Crypto.com Exchange
LINK-USD$17.51
0.0062350 Eth
$549,827.00
31,406.100 LINK
0.3387%
38
Coinbase Exchange
LINK-EUR$17.55
0.0062532 Eth
$359,301.00
20,474.030 LINK
0.2208%
39
BigONE
LINK-USDT$17.47
0.0062200 Eth
$316,575.00
18,117.580 LINK
0.1954%
40
BitMart
LINK-BTC$17.53
0.0062432 Eth
$276,121.00
15,751.380 LINK
0.1699%
41
WhiteBIT
LINK-BTC$17.52
0.0062408 Eth
$264,622.00
15,103.140 LINK
0.1629%
42
Coinbase Exchange
LINK-GBP$17.52
0.0062416 Eth
$264,071.00
15,075.410 LINK
0.1626%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.53
0.0062479 Eth
$255,050.00
14,505.812 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1564%
44
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.61
0.0062730 Eth
$252,013.00
28,092.851 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3030%
45
LATOKEN
LINK-BTC$17.53
0.0062452 Eth
$191,510.00
10,921.653 LINK
0.1178%
46
Bitbank
LINK-JPY$17.54
0.0062483 Eth
$187,984.00
10,715.792 LINK
0.1156%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.53
0.0062452 Eth
$187,912.00
10,476.393 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1130%
48
Bitci TR
LINK-TRY$17.50
0.0062333 Eth
$186,702.00
10,480.490 LINK
0.1130%
49
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.53
0.0062452 Eth
$181,887.00
184,428.096 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.9889%
50
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.65
0.0062897 Eth
$166,479.00
9,331.910 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1006%
51
BitStorage
LINK-ETH$17.55
0.0062412 Eth
$151,935.00
8,658.990 LINK
0.0934%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.52
0.0062418 Eth
$151,527.00
8,521.932 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0919%
53
Slex
LINK-ETH$17.52
0.0062430 Eth
$146,786.00
8,263.530 LINK
0.0891%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.53
0.0062459 Eth
$138,791.00
7,908.934 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0853%
55
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.49
0.0062321 Eth
$126,722.00
7,051.094 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0760%
56
GMO Japan
LINK-JPY$17.64
0.0062841 Eth
$104,795.00
5,939.700 LINK
0.0641%
57
Hotcoin
LINK-BTC$17.53
0.0062441 Eth
$83,673.00
4,773.000 LINK
0.0515%
58
BitMart
LINK-ETH$17.52
0.0062418 Eth
$80,082.00
4,569.760 LINK
0.0493%
59
BYDFi
LINK-USDC$17.59
0.0062565 Eth
$75,438.00
4,289.010 LINK
0.0463%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.55
0.0062530 Eth
$73,892.00
4,123.531 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0445%
61
Bybit
LINK-USDC$17.52
0.0062410 Eth
$71,557.00
4,049.744 LINK
0.0437%
62
bitcastle
LINK-USDT$17.53
0.0062444 Eth
$69,546.00
3,915.510 LINK
0.0422%
63
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.54
0.0062465 Eth
$67,411.00
3,795.955 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0409%
64
Kanga
LINK-PLN$17.55
0.0062510 Eth
$55,054.00
0.000 LINK
0.0000%
65
KuCoin
LINK-USDC$17.56
0.0062529 Eth
$48,768.00
2,777.806 LINK
0.0300%
66
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.55
0.0062538 Eth
$46,955.00
2,653.026 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0286%
67
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.60
0.0062703 Eth
$44,896.00
45,389.116 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4895%
68
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.58
0.0062646 Eth
$44,810.00
2,512.043 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0271%
69
Bitso
LINK-USD$17.56
0.0062575 Eth
$43,241.00
2,462.410 LINK
0.0266%
70
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.63
0.0062792 Eth
$38,095.00
38,432.384 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4145%
71
KuCoin
LINK-BTC$17.53
0.0062448 Eth
$26,127.00
1,490.070 LINK
0.0161%
72
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.57
0.0062625 Eth
$23,517.00
1,371.159 0X5947BB275C521040051D82396192181B413227A3
0.0148%
73
EXMO
LINK-BTC$17.57
0.0062589 Eth
$21,545.00
1,225.953 LINK
0.0132%
74
Dex-Trade
LINK-ETH$17.53
0.0062436 Eth
$19,876.99
1,134.010 LINK
0.0122%
75
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.66
0.0062911 Eth
$15,613.06
15,721.394 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1695%
76
Bitstamp
LINK-GBP$17.49
0.0062289 Eth
$11,962.28
684.027 LINK
0.0074%
77
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.61
0.0062730 Eth
$11,401.05
642.840 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0069%
78
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.61
0.0062746 Eth
$6,727.97
9.397 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
79
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$17.59
0.0062707 Eth
$6,312.88
355.630 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0038%
80
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.54
0.0062491 Eth
$5,996.38
6,074.871 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0655%
81
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.57
0.0062584 Eth
$5,797.86
327.270 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0035%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.52
0.0062444 Eth
$5,618.84
316.027 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0034%
83
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.60
0.0062695 Eth
$5,277.82
294.476 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0032%
84
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.44
0.0062146 Eth
$5,053.18
612.407 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0066%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$17.53
0.0062483 Eth
$4,691.93
265.035 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0029%
86
Bitexen
LINK-TRY$17.40
0.0061979 Eth
$4,688.28
269.391 LINK
0.0029%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD93F7E271CB87C23AAA73EDC008A79646D1F9912$17.59
0.0062681 Eth
$4,111.24
232.114 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0025%
88
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.60
0.0062702 Eth
$4,080.30
4,122.410 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0445%
89
CoinEx
LINK-USDC$17.49
0.0062302 Eth
$3,906.37
220.562 LINK
0.0024%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$17.56
0.0062583 Eth
$3,327.92
187.635 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0020%
91
CoinEx
LINK-BTC$17.58
0.0062606 Eth
$3,109.56
175.264 LINK
0.0019%
92
Uniswap V4 (Polygon)
0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.63
0.0062797 Eth
$3,025.86
3,052.222 0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174
0.0329%
93
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.59
0.0062707 Eth
$3,010.45
12.276 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0001%
94
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.47
0.0062238 Eth
$1,232.50
5.062 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0001%
95
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.54
0.0062525 Eth
$1,110.71
62.064 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0007%
96
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XD036414FA2BCBB802691491E323BFF1348C5F4BA$17.46
0.0062198 Eth
$866.78
48.464 0X5947BB275C521040051D82396192181B413227A3
0.0005%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.56
0.0062577 Eth
$843.77
48.081 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
98
KuCoin
LINK-KCS$17.49
0.0062299 Eth
$836.17
47.804 LINK
0.0005%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$17.59
0.0062632 Eth
$645.01
36.126 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
100
Osmosis
IBC/D3327A763C23F01EC43D1F0DB3CEFEC390C362569B6FD191F40A5192F8960049-UOSMO$17.69
0.0063016 Eth
$317.90
17.968 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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