ETH Price: $2,361.64 (-3.30%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,548 ( 0.016%)

Market

Price

$10.43 @ 0.004416 ETH (-4.47%)

Onchain Market Cap

$10,430,000,000.00

Circulating Supply Market Cap

$6,562,293,803.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
76.7 LINK

Value
$799.98 ( ~0.338739234492316 Eth) [0.0000%]
0x5e03b0296337BF2A428104439F4Ed0313EE4fd76
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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 9381.82% |ETH 0.0003846 1048.21%

Market

Volume (24H):$371,200,172.00
Market Capitalization:$6,562,293,803.00
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$10.46
0.0043898 Eth
$32,623,852.00
3,120,119.880 LINK
17.2457%
2
Binance
LINK-USDT$10.41
0.0043996 Eth
$27,283,822.00
2,547,424.240 LINK
14.0802%
3
WhiteBIT
LINK-USDT$10.43
0.0044065 Eth
$12,721,487.00
1,219,609.710 LINK
6.7411%
4
Coinbase Exchange
LINK-USD$10.44
0.0044213 Eth
$12,606,339.00
1,207,503.730 LINK
6.6742%
5
Bybit
LINK-USDT$10.42
0.0044117 Eth
$11,140,391.00
1,039,740.459 LINK
5.7469%
6
HTX
LINK-USDT$10.44
0.0044249 Eth
$10,644,092.00
991,391.586 LINK
5.4797%
7
Bitget
LINK-USDT$10.43
0.0044149 Eth
$9,477,873.00
883,082.071 LINK
4.8810%
8
P2B
LINK-USDT$10.44
0.0044216 Eth
$5,439,207.00
520,956.320 LINK
2.8795%
9
Azbit
LINK-USDT$10.43
0.0044091 Eth
$5,106,846.00
475,388.210 LINK
2.6276%
10
BVOX
LINK-USDT$10.42
0.0044181 Eth
$4,870,541.00
454,273.810 LINK
2.5109%
11
Slex
LINK-USDT$10.43
0.0044081 Eth
$4,794,935.00
447,006.730 LINK
2.4707%
12
WEEX
LINK-USDT$10.42
0.0043884 Eth
$4,324,400.00
403,893.150 LINK
2.2324%
13
Trubit
LINK-USDT$10.42
0.0044028 Eth
$3,692,011.00
344,645.640 LINK
1.9049%
14
BTSE
LINK-USDT$10.42
0.0043976 Eth
$3,603,633.00
345,687.269 LINK
1.9107%
15
DigiFinex
LINK-USDT$10.44
0.0044233 Eth
$3,202,020.00
306,791.070 LINK
1.6957%
16
Biconomy.com
LINK-USDT$10.43
0.0043993 Eth
$3,099,648.00
288,910.880 LINK
1.5969%
17
KuCoin
LINK-USDT$10.42
0.0044120 Eth
$3,092,096.00
296,707.701 LINK
1.6400%
18
Upbit
LINK-KRW$10.53
0.0044624 Eth
$2,895,249.00
274,965.084 LINK
1.5198%
19
Deepcoin
LINK-USDT$10.42
0.0044038 Eth
$2,659,652.00
241,367.844 LINK
1.3341%
20
OKX
LINK-USDT$10.42
0.0044030 Eth
$2,538,831.00
237,803.327 LINK
1.3144%
21
XT.COM
LINK-USDT$10.41
0.0043996 Eth
$2,446,365.00
228,415.960 LINK
1.2625%
22
ProBit Global
LINK-USDT$10.41
0.0043933 Eth
$2,219,438.00
213,111.433 LINK
1.1779%
23
Coinstore
LINK-USDT$10.47
0.0043952 Eth
$1,774,158.00
165,340.610 LINK
0.9139%
24
Gate.io
LINK-USDT$10.43
0.0044187 Eth
$1,624,255.00
151,935.470 LINK
0.8398%
25
AscendEX (BitMax)
LINK-USDT$10.42
0.0044108 Eth
$1,621,778.00
155,660.500 LINK
0.8604%
26
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.47
0.0044331 Eth
$1,480,070.00
141,594.319 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.7826%
27
BYDFi
LINK-USDT$10.46
0.0043898 Eth
$1,260,079.00
120,512.930 LINK
0.6661%
28
Hotcoin
LINK-USDT$10.44
0.0044253 Eth
$1,032,377.00
98,869.370 LINK
0.5465%
29
FMCPAY
LINK-USDT$10.43
0.0044219 Eth
$879,434.00
82,054.936 LINK
0.4535%
30
Dex-Trade
LINK-USDT$10.44
0.0043908 Eth
$862,748.00
82,667.880 LINK
0.4569%
31
LATOKEN
LINK-USDT$10.44
0.0043909 Eth
$848,563.00
81,306.635 LINK
0.4494%
32
Azbit
LINK-ETH$10.42
0.0044180 Eth
$825,002.00
79,161.883 LINK
0.4375%
33
tanX
LINK-USDC$10.46
0.0044186 Eth
$646,603.00
60,109.450 LINK
0.3322%
34
CoinEx
LINK-USDT$10.45
0.0043950 Eth
$625,037.00
58,220.000 LINK
0.3218%
35
WhiteBIT
LINK-BTC$10.45
0.0044136 Eth
$515,053.00
49,298.920 LINK
0.2725%
36
FMCPAY
LINK-BTC$10.44
0.0044246 Eth
$465,314.00
44,493.000 LINK
0.2459%
37
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.55
0.0044247 Eth
$461,355.00
43,952.321 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2429%
38
PointPay
LINK-USDT$10.42
0.0043884 Eth
$447,142.00
41,747.468 LINK
0.2307%
39
Bithumb
LINK-KRW$10.54
0.0044688 Eth
$392,339.00
37,208.395 LINK
0.2057%
40
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.41
0.0043978 Eth
$366,434.00
35,281.208 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1950%
41
FMCPAY
LINK-ETH$10.49
0.0044191 Eth
$332,231.00
31,671.440 LINK
0.1751%
42
BigONE
LINK-USDT$10.44
0.0043818 Eth
$327,214.00
31,351.170 LINK
0.1733%
43
Phemex
LINK-USDT$10.43
0.0044174 Eth
$292,145.00
28,007.870 LINK
0.1548%
44
WhiteBIT
LINK-EUR$10.43
0.0044075 Eth
$265,351.00
25,433.270 LINK
0.1406%
45
itBit
LINK-USD$10.45
0.0044287 Eth
$255,636.00
24,462.727 LINK
0.1352%
46
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.50
0.0044347 Eth
$222,228.00
21,177.149 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1171%
47
ProBit Global
LINK-BTC$10.43
0.0044005 Eth
$215,005.00
20,611.377 LINK
0.1139%
48
BitMart
LINK-BTC$10.45
0.0044143 Eth
$172,800.00
16,536.960 LINK
0.0914%
49
LATOKEN
LINK-BTC$10.44
0.0043921 Eth
$171,627.00
16,440.143 LINK
0.0909%
50
BitDelta
LINK-USDT$10.42
0.0043884 Eth
$132,677.00
12,375.000 LINK
0.0684%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.56
0.0044303 Eth
$132,295.00
12,532.375 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0693%
52
Hotcoin
LINK-ETH$10.45
0.0044300 Eth
$122,385.00
11,708.080 LINK
0.0647%
53
Bitci TR
LINK-TRY$10.42
0.0043767 Eth
$110,365.00
10,237.410 LINK
0.0566%
54
Bitbank
LINK-JPY$10.45
0.0044095 Eth
$102,873.00
9,841.607 LINK
0.0544%
55
Slex
LINK-ETH$10.40
0.0043920 Eth
$95,619.00
9,169.870 LINK
0.0507%
56
Hotcoin
LINK-BTC$10.43
0.0044182 Eth
$92,532.00
8,875.830 LINK
0.0491%
57
BYDFi
LINK-USDC$10.42
0.0043887 Eth
$85,096.00
8,166.640 LINK
0.0451%
58
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.47
0.0044235 Eth
$83,663.00
7,928.205 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0438%
59
Coinbase Exchange
LINK-ETH$10.48
0.0043952 Eth
$74,968.00
7,153.610 LINK
0.0395%
60
Bitget
LINK-EUR$10.44
0.0044232 Eth
$60,473.00
5,641.750 LINK
0.0312%
61
WhiteBIT
LINK-TRY$10.47
0.0044245 Eth
$53,377.00
5,096.480 LINK
0.0282%
62
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.32
0.0043696 Eth
$51,008.00
4,870.526 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0269%
63
Slex
LINK-BTC$10.42
0.0044016 Eth
$50,762.00
4,849.100 LINK
0.0268%
64
GMO Japan
LINK-JPY$10.47
0.0044155 Eth
$48,710.00
4,653.600 LINK
0.0257%
65
OKX
LINK-USDC$10.41
0.0044091 Eth
$44,184.00
4,153.972 LINK
0.0230%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.43
0.0044019 Eth
$41,239.00
3,847.323 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0213%
67
BitStorage
LINK-ETH$10.43
0.0044060 Eth
$39,885.00
3,824.230 LINK
0.0211%
68
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.42
0.0043853 Eth
$35,985.00
36,919.333 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2041%
69
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.54
0.0044221 Eth
$35,680.00
36,297.345 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2006%
70
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.55
0.0044372 Eth
$29,767.00
2,819.103 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0156%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.41
0.0043902 Eth
$27,248.00
2,618.064 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0145%
72
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.36
0.0043761 Eth
$25,385.00
2,388.211 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0132%
73
Bitso
LINK-USD$10.46
0.0044309 Eth
$24,467.00
2,340.202 LINK
0.0129%
74
EXMO
LINK-BTC$10.43
0.0044171 Eth
$21,601.00
2,070.969 LINK
0.0114%
75
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.39
0.0043876 Eth
$20,337.00
1,950.369 0X5947BB275C521040051D82396192181B413227A3
0.0108%
76
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$10.45
0.0044141 Eth
$19,760.28
1,893.817 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0105%
77
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.33
0.0043641 Eth
$19,433.44
1,878.313 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0104%
78
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.50
0.0044347 Eth
$17,485.60
17,852.770 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0987%
79
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.39
0.0043876 Eth
$16,733.52
1,604.314 0X5947BB275C521040051D82396192181B413227A3
0.0089%
80
Nonkyc.io
LINK-BTC$10.39
0.0044021 Eth
$14,426.08
1,379.534 LINK
0.0076%
81
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.35
0.0043741 Eth
$11,942.20
1,144.083 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0063%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.44
0.0043934 Eth
$10,543.90
985.634 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0054%
83
Coinone
LINK-KRW$10.60
0.0044798 Eth
$9,656.87
910.654 LINK
0.0050%
84
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.43
0.0044161 Eth
$7,875.23
763.660 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0042%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.36
0.0043761 Eth
$4,490.10
4,619.554 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0255%
86
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.50
0.0044284 Eth
$4,152.86
397.462 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0022%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.49
0.0044141 Eth
$4,150.38
394.177 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0022%
88
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.34
0.0043798 Eth
$2,600.94
252.181 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0014%
89
CoinEx
LINK-BTC$10.49
0.0044118 Eth
$2,398.24
228.752 LINK
0.0013%
90
CoinEx
LINK-USDC$10.44
0.0043925 Eth
$1,956.40
182.528 LINK
0.0010%
91
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.53
0.0044220 Eth
$1,680.11
156.096 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0009%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.49
0.0044423 Eth
$859.70
79.457 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.44
0.0043909 Eth
$812.91
76.574 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0004%
94
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$10.32
0.0043447 Eth
$711.73
736.989 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0041%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XB33EAAD8D922B1083446DC23F610C2567FB5180F$10.54
0.0044128 Eth
$546.55
50.370 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
96
Solidly V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.54
0.0043662 Eth
$246.31
23.227 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0001%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.54
0.0044128 Eth
$179.88
16.953 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
98
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.50
0.0043487 Eth
$160.97
305.601 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0017%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X7130D2A12B9BCBFAE4F2634D864A1EE1CE3EAD9C$10.37
0.0043816 Eth
$131.90
12.588 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0001%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$10.54
0.0044117 Eth
$116.20
10.835 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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