ETH Price: $2,673.32 (-1.22%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,173 ( -0.005%)

Market

Price

$12.85 @ 0.004807 ETH (+1.38%)

Onchain Market Cap

$12,850,000,000.00

Circulating Supply Market Cap

$8,051,146,519.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
120 LINK

Value
$1,542.00 ( ~0.576810386802078 Eth) [0.0000%]
0x92e0207eaC0809f88fF1319F8B50e72B47B819C6
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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 11581.82% |ETH 0.0003846 1149.87%

Market

Volume (24H):$396,519,174.00
Market Capitalization:$8,051,146,519.00
Circulating Supply:626,849,971.00 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
LBank
LINK-USDT$12.91
0.0048281 Eth
$31,726,770.00
2,457,077.470 LINK
15.3811%
2
Binance
LINK-USDT$12.90
0.0048250 Eth
$27,579,795.00
2,168,634.600 LINK
13.5755%
3
Bybit
LINK-USDT$12.91
0.0048272 Eth
$15,662,983.00
1,229,782.648 LINK
7.6983%
4
WhiteBIT
LINK-USDT$12.92
0.0048311 Eth
$13,794,760.00
1,067,968.690 LINK
6.6854%
5
Websea
LINK-USDT$12.91
0.0048280 Eth
$12,229,181.00
0.000 LINK
0.0000%
6
Coinbase Exchange
LINK-USD$12.88
0.0048242 Eth
$11,592,200.00
899,736.090 LINK
5.6323%
7
HTX
LINK-USDT$12.92
0.0048308 Eth
$11,482,531.00
902,853.405 LINK
5.6518%
8
Bitget
LINK-USDT$12.92
0.0048307 Eth
$10,894,706.00
855,055.585 LINK
5.3526%
9
P2B
LINK-USDT$12.91
0.0048293 Eth
$5,899,389.00
456,867.350 LINK
2.8599%
10
WEEX
LINK-USDT$12.90
0.0048245 Eth
$5,585,442.00
438,645.290 LINK
2.7459%
11
Azbit
LINK-USDT$12.90
0.0048240 Eth
$5,327,321.00
417,948.080 LINK
2.6163%
12
Biconomy.com
LINK-USDT$12.91
0.0048289 Eth
$5,269,669.00
413,809.270 LINK
2.5904%
13
BVOX
LINK-USDT$12.89
0.0048232 Eth
$5,021,944.00
394,540.250 LINK
2.4698%
14
OKX
LINK-USDT$12.91
0.0048278 Eth
$4,743,157.00
373,119.123 LINK
2.3357%
15
Slex
LINK-USDT$12.89
0.0048256 Eth
$4,691,817.00
368,722.620 LINK
2.3082%
16
DigiFinex
LINK-USDT$12.91
0.0048289 Eth
$3,668,460.00
284,084.080 LINK
1.7783%
17
Deepcoin
LINK-USDT$12.90
0.0048254 Eth
$2,938,502.00
233,338.540 LINK
1.4607%
18
Coinstore
LINK-USDT$12.89
0.0048247 Eth
$2,840,730.00
223,222.100 LINK
1.3973%
19
KuCoin
LINK-USDT$12.91
0.0048280 Eth
$2,682,966.00
207,786.945 LINK
1.3007%
20
XT.COM
LINK-USDT$12.87
0.0048179 Eth
$2,630,617.00
206,809.090 LINK
1.2946%
21
C-Patex
LINK-USDT$12.89
0.0048220 Eth
$2,022,087.00
156,919.612 LINK
0.9823%
22
Kraken
LINK-USD$12.91
0.0048289 Eth
$1,991,691.00
154,222.993 LINK
0.9654%
23
Gate.io
LINK-USDT$12.92
0.0048307 Eth
$1,834,656.00
144,297.430 LINK
0.9033%
24
AscendEX (BitMax)
LINK-USDT$12.92
0.0048314 Eth
$1,748,747.00
135,354.100 LINK
0.8473%
25
Crypto.com Exchange
LINK-USDT$12.91
0.0048276 Eth
$1,394,944.00
108,060.060 LINK
0.6764%
26
Trubit
LINK-USDT$12.91
0.0048289 Eth
$1,366,248.00
107,077.840 LINK
0.6703%
27
BYDFi
LINK-USDT$12.84
0.0048097 Eth
$1,359,116.00
105,823.120 LINK
0.6624%
28
FMCPAY
LINK-USDT$12.90
0.0048254 Eth
$1,093,949.00
85,976.880 LINK
0.5382%
29
BTSE
LINK-USDT$12.89
0.0048233 Eth
$1,063,116.00
82,451.527 LINK
0.5161%
30
Bybit
LINK-USDC$12.90
0.0048266 Eth
$1,039,863.00
81,671.302 LINK
0.5113%
31
Dex-Trade
LINK-USDT$12.89
0.0048254 Eth
$948,918.00
73,601.420 LINK
0.4607%
32
Azbit
LINK-ETH$12.89
0.0048216 Eth
$915,266.00
72,058.692 LINK
0.4511%
33
Bitvavo
LINK-EUR$12.87
0.0048165 Eth
$907,952.00
70,550.323 LINK
0.4416%
34
FMFW.io
LINK-USDT$12.91
0.0048290 Eth
$845,149.00
65,447.270 LINK
0.4097%
35
HitBTC
LINK-USDT$12.90
0.0048280 Eth
$831,534.00
65,441.530 LINK
0.4097%
36
Bithumb
LINK-KRW$12.94
0.0048377 Eth
$591,332.00
45,712.078 LINK
0.2862%
37
FMCPAY
LINK-BTC$12.90
0.0048246 Eth
$590,978.00
46,483.400 LINK
0.2910%
38
EXMO
LINK-USDT$12.91
0.0048277 Eth
$589,103.00
45,631.235 LINK
0.2856%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.89
0.0048205 Eth
$573,095.00
45,095.685 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2823%
40
FMCPAY
LINK-ETH$12.89
0.0048208 Eth
$568,310.00
44,730.400 LINK
0.2800%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.88
0.0048169 Eth
$553,807.00
43,923.882 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2750%
42
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.85
0.0048056 Eth
$526,103.00
41,599.849 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2604%
43
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.89
0.0048180 Eth
$500,198.00
39,358.652 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2464%
44
CoinEx
LINK-USDT$12.90
0.0048253 Eth
$453,437.00
35,608.938 LINK
0.2229%
45
PointPay
LINK-USDT$12.89
0.0048239 Eth
$442,025.00
34,753.269 LINK
0.2176%
46
LATOKEN
LINK-USDT$12.87
0.0048152 Eth
$352,333.00
27,380.714 LINK
0.1714%
47
LATOKEN
LINK-BTC$12.88
0.0048181 Eth
$314,278.00
24,408.459 LINK
0.1528%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.86
0.0048104 Eth
$289,902.00
22,945.718 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1436%
49
BigONE
LINK-USDT$12.86
0.0048086 Eth
$208,739.00
16,231.400 LINK
0.1016%
50
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.87
0.0048141 Eth
$194,908.00
15,428.789 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0966%
51
BitMart
LINK-BTC$12.89
0.0048218 Eth
$194,907.00
15,126.020 LINK
0.0947%
52
Coinbase Exchange
LINK-ETH$12.88
0.0048165 Eth
$168,389.00
13,074.560 LINK
0.0818%
53
Slex
LINK-BTC$12.89
0.0048235 Eth
$152,131.00
11,969.500 LINK
0.0749%
54
Gemini
LINK-USD$12.84
0.0048022 Eth
$130,790.00
10,183.667 LINK
0.0637%
55
Bitci TR
LINK-TRY$12.82
0.0047988 Eth
$130,548.00
10,238.660 LINK
0.0641%
56
PointPay
LINK-BTC$12.90
0.0048255 Eth
$103,527.00
8,142.907 LINK
0.0510%
57
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.90
0.0048232 Eth
$89,820.00
88,664.728 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5550%
58
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$12.87
0.0048119 Eth
$86,876.00
6,827.991 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0427%
59
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.89
0.0048180 Eth
$68,369.00
67,342.045 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4216%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.89
0.0048191 Eth
$65,571.00
5,146.481 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0322%
61
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$12.85
0.0048052 Eth
$64,667.00
5,177.548 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0324%
62
Bitget
LINK-EUR$12.95
0.0048422 Eth
$59,321.00
4,652.610 LINK
0.0291%
63
Slex
LINK-ETH$12.87
0.0048159 Eth
$51,943.00
4,094.870 LINK
0.0256%
64
EXMO
LINK-BTC$12.91
0.0048294 Eth
$50,424.00
3,904.468 LINK
0.0244%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.90
0.0048232 Eth
$47,274.00
3,717.937 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0233%
66
LATOKEN
LINK-ETH$12.88
0.0048205 Eth
$40,553.00
3,148.045 LINK
0.0197%
67
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.85
0.0048053 Eth
$40,168.00
39,494.968 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2472%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.87
0.0048146 Eth
$39,749.00
3,129.007 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0196%
69
Ace
LINK-USDT$12.91
0.0048293 Eth
$37,524.00
2,957.090 LINK
0.0185%
70
Mercado Bitcoin
LINK-BRL$12.93
0.0048352 Eth
$32,381.00
2,504.380 LINK
0.0157%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.89
0.0048227 Eth
$30,195.00
2,371.618 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0148%
72
KuCoin
LINK-USDC$12.90
0.0048246 Eth
$30,134.00
2,335.432 LINK
0.0146%
73
Bitso
LINK-USD$12.90
0.0048236 Eth
$28,476.00
2,207.966 LINK
0.0138%
74
Binance US
LINK-USDT$12.88
0.0048201 Eth
$20,983.00
1,628.954 LINK
0.0102%
75
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.84
0.0048006 Eth
$18,765.34
1,485.726 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0093%
76
KuCoin
LINK-KCS$12.91
0.0048278 Eth
$17,596.78
1,362.884 LINK
0.0085%
77
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.86
0.0048101 Eth
$17,396.28
1,373.385 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0086%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$12.89
0.0048214 Eth
$14,047.91
1,105.011 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0069%
79
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.85
0.0048056 Eth
$8,798.02
8,676.613 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0543%
80
CoinEx
LINK-BTC$12.83
0.0047993 Eth
$7,320.60
576.498 LINK
0.0036%
81
CoinEx
LINK-USDC$12.96
0.0048475 Eth
$7,040.77
551.395 LINK
0.0035%
82
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$12.83
0.0048017 Eth
$5,877.59
464.805 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0029%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$12.87
0.0048157 Eth
$5,094.42
399.897 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0025%
84
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.82
0.0047996 Eth
$3,961.33
313.027 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0020%
85
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.88
0.0048217 Eth
$3,175.65
249.570 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0016%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$12.87
0.0048131 Eth
$2,617.87
209.343 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0013%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$12.89
0.0048209 Eth
$2,187.48
172.208 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0011%
88
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.82
0.0047973 Eth
$2,095.96
165.408 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0010%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.81
0.0048014 Eth
$1,316.68
104.091 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0007%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$12.89
0.0048314 Eth
$1,313.26
102.100 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
91
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$12.80
0.0047973 Eth
$1,090.72
58.624 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
92
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.84
0.0048028 Eth
$900.83
71.084 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0004%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$12.82
0.0047976 Eth
$847.28
66.670 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
94
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.90
0.0048252 Eth
$360.76
355.403 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0022%
95
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.82
0.0048019 Eth
$298.47
448.615 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0028%
96
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$12.77
0.0047849 Eth
$229.57
18.204 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0001%
97
Balancer V2 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XDF7837DE1F2FA4631D716CF2502F8B230F1DCC32$12.88
0.0048212 Eth
$226.81
18.087 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.84
0.0048107 Eth
$213.51
16.841 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0001%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$12.85
0.0048063 Eth
$166.11
13.064 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XB33EAAD8D922B1083446DC23F610C2567FB5180F$12.88
0.0048157 Eth
$141.61
11.238 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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