ETH Price: $3,271.58 (-1.30%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,566 ( -0.020%)

Market

Price

$19.91 @ 0.006086 ETH (-0.49%)

Onchain Market Cap

$19,910,000,000.00

Circulating Supply Market Cap

$12,534,367,245.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
20.05092898162484923 LINK

Value
$399.21 ( ~0.122023784117657 Eth) [0.0000%]
0xd861edbe2947283dbc861e146d5d1e44fa9e0b5b
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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 18000% |ETH 0.0003846 1482.42%

Market

Volume (24H):$489,204,274.00
Market Capitalization:$12,534,367,245.00
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$19.96
0.0061058 Eth
$52,117,482.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$19.95
0.0061039 Eth
$51,476,941.00
2,559,015.120 LINK
20.1250%
3
Coinbase Exchange
LINK-USD$19.96
0.0061072 Eth
$20,596,224.00
1,031,823.240 LINK
8.1146%
4
WEEX
LINK-USDT$19.92
0.0060952 Eth
$12,540,891.00
623,802.750 LINK
4.9058%
5
Bitget
LINK-USDT$19.95
0.0061024 Eth
$10,966,585.00
544,703.098 LINK
4.2837%
6
P2B
LINK-USDT$19.92
0.0060941 Eth
$10,752,359.00
539,801.690 LINK
4.2452%
7
Bybit
LINK-USDT$19.94
0.0060993 Eth
$9,365,745.00
465,109.861 LINK
3.6578%
8
HTX
LINK-USDT$19.96
0.0061046 Eth
$8,956,411.00
445,661.599 LINK
3.5048%
9
Poloniex
LINK-USDT$19.95
0.0061042 Eth
$8,247,039.00
410,048.413 LINK
3.2248%
10
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.89
0.0060880 Eth
$8,206,258.00
65,862.184 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.5180%
11
BVOX
LINK-USDT$19.96
0.0061073 Eth
$7,495,555.00
372,833.450 LINK
2.9321%
12
Ourbit
LINK-USDT$19.99
0.0061079 Eth
$7,163,546.00
355,928.960 LINK
2.7992%
13
DigiFinex
LINK-USDT$19.96
0.0061060 Eth
$6,198,548.00
310,529.690 LINK
2.4421%
14
MEXC
LINK-USDT$19.92
0.0060949 Eth
$5,901,631.00
296,256.680 LINK
2.3299%
15
XT.COM
LINK-USDT$19.88
0.0060988 Eth
$5,197,040.00
258,308.210 LINK
2.0314%
16
FameEX
LINK-USDT$19.95
0.0061108 Eth
$5,171,638.00
256,992.065 LINK
2.0211%
17
Azbit
LINK-USDT$19.92
0.0060962 Eth
$5,111,062.00
254,112.916 LINK
1.9984%
18
Deepcoin
LINK-USDT$19.91
0.0060956 Eth
$5,064,484.00
271,598.040 LINK
2.1359%
19
OKX
LINK-USDT$19.95
0.0061037 Eth
$4,775,725.00
237,605.143 LINK
1.8686%
20
Coinstore
LINK-USDT$19.90
0.0060916 Eth
$4,675,005.00
232,586.310 LINK
1.8291%
21
CoinW
LINK-USDT$19.96
0.0061045 Eth
$4,195,840.00
210,251.100 LINK
1.6535%
22
Bitunix
LINK-USDT$19.92
0.0060972 Eth
$3,648,965.00
183,174.330 LINK
1.4405%
23
Gate.io
LINK-USDT$19.97
0.0061073 Eth
$3,542,378.00
175,878.220 LINK
1.3832%
24
Toobit
LINK-USDT$19.98
0.0061116 Eth
$3,286,023.00
163,365.710 LINK
1.2848%
25
BYDFi
LINK-USDT$19.93
0.0060993 Eth
$2,859,992.00
143,504.110 LINK
1.1286%
26
Kraken
LINK-USD$19.93
0.0060960 Eth
$2,842,913.00
142,655.228 LINK
1.1219%
27
Hotcoin
LINK-USDT$19.94
0.0061012 Eth
$2,764,526.00
138,632.240 LINK
1.0903%
28
LBank
LINK-USDT$19.88
0.0060978 Eth
$2,544,596.00
127,997.830 LINK
1.0066%
29
LATOKEN
LINK-USDT$19.92
0.0060935 Eth
$2,500,519.00
125,526.910 LINK
0.9872%
30
BTSE
LINK-USDT$19.93
0.0061099 Eth
$2,239,831.00
112,380.691 LINK
0.8838%
31
QMall
LINK-USDT$19.90
0.0060870 Eth
$1,934,520.00
96,221.254 LINK
0.7567%
32
KuCoin
LINK-USDT$19.98
0.0061060 Eth
$1,818,061.00
90,996.885 LINK
0.7156%
33
FMCPAY
LINK-USDT$19.95
0.0061024 Eth
$1,683,686.00
83,894.640 LINK
0.6598%
34
Dex-Trade
LINK-USDT$19.95
0.0061054 Eth
$1,673,106.00
83,869.580 LINK
0.6596%
35
Biconomy.com
LINK-USDT$19.88
0.0060999 Eth
$1,331,047.00
66,262.790 LINK
0.5211%
36
Coinbase Exchange
LINK-GBP$19.97
0.0061135 Eth
$1,106,404.00
55,399.250 LINK
0.4357%
37
Coinbase Exchange
LINK-ETH$19.95
0.0060970 Eth
$1,102,855.00
55,280.870 LINK
0.4347%
38
Bitvavo
LINK-EUR$19.94
0.0061025 Eth
$1,097,885.00
55,059.802 LINK
0.4330%
39
CoinEx
LINK-USDT$19.91
0.0060948 Eth
$1,070,543.00
53,183.423 LINK
0.4183%
40
FMCPAY
LINK-ETH$19.94
0.0060990 Eth
$1,033,031.00
51,266.080 LINK
0.4032%
41
PointPay
LINK-USDT$19.91
0.0060954 Eth
$801,570.00
39,861.186 LINK
0.3135%
42
Coinbase Exchange
LINK-EUR$19.92
0.0060992 Eth
$693,844.00
34,823.690 LINK
0.2739%
43
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.94
0.0060953 Eth
$661,840.00
32,919.287 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2589%
44
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.00
0.0061113 Eth
$589,532.00
29,163.118 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2293%
45
EXMO
LINK-USDT$19.98
0.0061056 Eth
$486,810.00
24,366.955 LINK
0.1916%
46
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.92
0.0060877 Eth
$458,605.00
22,774.229 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1791%
47
Bitbegin
LINK-USDT$19.95
0.0061064 Eth
$416,192.00
20,727.976 LINK
0.1630%
48
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.91
0.0060952 Eth
$412,082.00
30,294.256 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2382%
49
Bitbank
LINK-JPY$19.94
0.0060929 Eth
$387,948.00
19,459.003 LINK
0.1530%
50
BigONE
LINK-USDT$19.94
0.0061040 Eth
$384,557.00
19,287.640 LINK
0.1517%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.94
0.0060934 Eth
$353,069.00
17,622.434 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1386%
52
OKX
LINK-USDC$19.95
0.0061012 Eth
$337,277.00
16,730.948 LINK
0.1316%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.92
0.0060877 Eth
$297,298.00
14,805.984 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1164%
54
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.98
0.0061062 Eth
$287,623.00
289,855.001 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.2795%
55
BitMart
LINK-BTC$19.94
0.0060953 Eth
$266,522.00
13,363.200 LINK
0.1051%
56
Coinbase Exchange
LINK-BTC$19.97
0.0061016 Eth
$234,919.00
11,766.450 LINK
0.0925%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.91
0.0060850 Eth
$218,607.00
10,848.305 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0853%
58
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.98
0.0061073 Eth
$198,427.00
200,189.450 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.5744%
59
QMall
LINK-USDC$19.92
0.0060927 Eth
$196,131.00
9,748.088 LINK
0.0767%
60
Bitci TR
LINK-TRY$19.95
0.0061038 Eth
$189,943.00
9,422.130 LINK
0.0741%
61
Gemini
LINK-USD$19.95
0.0061037 Eth
$179,960.00
9,018.859 LINK
0.0709%
62
OKX
LINK-EUR$19.89
0.0060853 Eth
$158,611.00
7,862.264 LINK
0.0618%
63
Binance US
LINK-USDT$19.91
0.0060900 Eth
$106,118.00
5,329.830 LINK
0.0419%
64
Gemini
LINK-BTC$19.93
0.0060976 Eth
$99,785.00
5,005.828 LINK
0.0394%
65
Hotcoin
LINK-BTC$19.98
0.0061054 Eth
$94,400.00
4,725.350 LINK
0.0372%
66
BitMart
LINK-ETH$19.96
0.0061010 Eth
$86,576.00
4,336.840 LINK
0.0341%
67
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.98
0.0061073 Eth
$58,950.00
2,923.750 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0230%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.96
0.0061006 Eth
$58,824.00
2,914.104 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0229%
69
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.09
0.0061498 Eth
$50,636.00
3,698.251 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0291%
70
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.99
0.0061087 Eth
$37,974.00
1,927.880 0X5947BB275C521040051D82396192181B413227A3
0.0152%
71
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.95
0.0061068 Eth
$35,664.00
1,772.996 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0139%
72
EXMO
LINK-BTC$19.95
0.0060982 Eth
$35,175.00
1,762.806 LINK
0.0139%
73
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.92
0.0060877 Eth
$32,525.00
32,857.882 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2584%
74
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.95
0.0060971 Eth
$25,095.00
1,244.485 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0098%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.98
0.0061073 Eth
$19,737.72
980.427 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0077%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$19.99
0.0061099 Eth
$13,208.20
655.796 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0052%
77
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$20.04
0.0061240 Eth
$12,127.71
15.952 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
78
Dex-Trade
LINK-ETH$19.93
0.0061009 Eth
$11,734.72
588.670 LINK
0.0046%
79
Bitexen
LINK-TRY$19.83
0.0060696 Eth
$11,131.95
561.375 LINK
0.0044%
80
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.97
0.0061090 Eth
$10,067.74
509.316 0X5947BB275C521040051D82396192181B413227A3
0.0040%
81
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$19.91
0.0060952 Eth
$8,882.76
442.571 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0035%
82
CoinEx
LINK-USDC$19.86
0.0060770 Eth
$6,264.89
310.864 LINK
0.0024%
83
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$19.99
0.0061077 Eth
$4,541.35
225.153 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0018%
84
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.94
0.0061012 Eth
$3,481.15
3,514.304 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0276%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.97
0.0061203 Eth
$3,201.27
3,222.507 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0253%
86
CoinEx
LINK-BTC$19.87
0.0060824 Eth
$2,697.38
134.999 LINK
0.0011%
87
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.97
0.0061203 Eth
$2,254.26
3,035.378 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0239%
88
Ace
LINK-USDT$19.92
0.0060973 Eth
$2,134.63
106.180 LINK
0.0008%
89
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.14
0.0061646 Eth
$1,721.34
76.982 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0006%
90
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.85
0.0060761 Eth
$1,700.92
6.032 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0000%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XB33EAAD8D922B1083446DC23F610C2567FB5180F$19.76
0.0060381 Eth
$1,589.37
79.237 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
92
Lydia Finance
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$19.87
0.0060815 Eth
$1,311.75
66.575 0X5947BB275C521040051D82396192181B413227A3
0.0005%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$19.95
0.0061161 Eth
$1,264.43
63.315 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$19.83
0.0060676 Eth
$1,102.98
54.934 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0004%
95
Retro
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.92
0.0060981 Eth
$983.06
48.826 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0004%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$19.96
0.0061080 Eth
$732.85
36.445 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$20.00
0.0061203 Eth
$564.22
28.028 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0002%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XB33EAAD8D922B1083446DC23F610C2567FB5180F$19.84
0.0060720 Eth
$481.40
24.047 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$19.91
0.0060974 Eth
$231.13
11.513 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
100
Dfyn
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC168E40227E4EBD8C1CAE80F7A55A4F0E6D66C97$19.96
0.0061105 Eth
$96.35
4.521 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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