ETH Price: $2,630.69 (+0.06%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

720,990 ( 0.011%)

Market

Price

$12.17 @ 0.004626 ETH (+0.94%)

Onchain Market Cap

$12,170,000,000.00

Circulating Supply Market Cap

$7,631,285,492.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Stake.com 11
Balance
15,302.388851454419970556 LINK

Value
$186,230.07 ( ~70.7912 Eth) [0.0015%]
0x787B8840100d9BaAdD7463f4a73b5BA73B00C6cA
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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 10963.64% |ETH 0.0003846 1102.81%

Market

Volume (24H):$352,569,310.00
Market Capitalization:$7,631,285,492.00
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
Coinbase Exchange
LINK-USD$12.16
0.0046242 Eth
$15,028,374.00
1,235,885.990 LINK
10.8924%
2
Bybit
LINK-USDT$12.15
0.0046200 Eth
$14,426,750.00
1,197,494.866 LINK
10.5540%
3
HTX
LINK-USDT$12.16
0.0046239 Eth
$13,281,621.00
1,102,674.471 LINK
9.7183%
4
WhiteBIT
LINK-USDT$12.17
0.0046304 Eth
$13,032,979.00
1,070,607.360 LINK
9.4357%
5
Bitget
LINK-USDT$12.17
0.0046280 Eth
$9,343,384.00
774,780.758 LINK
6.8285%
6
Websea
LINK-USDT$12.15
0.0046217 Eth
$9,243,441.00
0.000 LINK
0.0000%
7
WEEX
LINK-USDT$12.15
0.0046229 Eth
$5,209,391.00
432,831.570 LINK
3.8147%
8
Azbit
LINK-USDT$12.16
0.0046247 Eth
$5,038,840.00
418,189.270 LINK
3.6857%
9
Biconomy.com
LINK-USDT$12.16
0.0046234 Eth
$4,929,492.00
408,848.103 LINK
3.6034%
10
P2B
LINK-USDT$12.16
0.0046242 Eth
$4,376,757.00
359,971.550 LINK
3.1726%
11
BVOX
LINK-USDT$12.16
0.0046257 Eth
$3,677,166.00
305,200.840 LINK
2.6899%
12
Slex
LINK-USDT$12.16
0.0046236 Eth
$3,591,366.00
298,288.500 LINK
2.6289%
13
OKX
LINK-USDT$12.16
0.0046242 Eth
$2,984,499.00
248,215.780 LINK
2.1876%
14
DigiFinex
LINK-USDT$12.16
0.0046219 Eth
$2,693,484.00
221,564.670 LINK
1.9527%
15
KuCoin
LINK-USDT$12.15
0.0046216 Eth
$2,326,746.00
191,452.341 LINK
1.6874%
16
Deepcoin
LINK-USDT$12.16
0.0046242 Eth
$2,230,065.00
190,214.860 LINK
1.6764%
17
Crypto.com Exchange
LINK-USDT$12.16
0.0046219 Eth
$2,108,869.00
173,475.970 LINK
1.5289%
18
XT.COM
LINK-USDT$12.16
0.0046223 Eth
$1,955,678.00
162,559.450 LINK
1.4327%
19
Trubit
LINK-USDT$12.15
0.0046217 Eth
$1,873,261.00
155,368.830 LINK
1.3693%
20
Upbit
LINK-KRW$12.17
0.0046270 Eth
$1,858,875.00
152,742.126 LINK
1.3462%
21
AscendEX (BitMax)
LINK-USDT$12.17
0.0046291 Eth
$1,745,444.00
143,387.300 LINK
1.2637%
22
Gate.io
LINK-USDT$12.16
0.0046245 Eth
$1,625,540.00
135,402.220 LINK
1.1934%
23
C-Patex
LINK-USDT$12.16
0.0046225 Eth
$1,577,237.00
129,718.515 LINK
1.1433%
24
CoinW
LINK-USDT$12.15
0.0046205 Eth
$1,571,545.00
129,341.590 LINK
1.1399%
25
WhiteBIT
LINK-BTC$12.16
0.0046268 Eth
$1,480,420.00
121,707.160 LINK
1.0727%
26
HashKey Global
LINK-USDT$12.17
0.0046261 Eth
$1,355,063.00
112,170.962 LINK
0.9886%
27
Kraken
LINK-USD$12.16
0.0046241 Eth
$1,355,018.00
111,412.146 LINK
0.9819%
28
Bitexen
LINK-TRY$12.17
0.0046285 Eth
$1,014,916.00
83,388.940 LINK
0.7349%
29
BYDFi
LINK-USDT$12.16
0.0046223 Eth
$1,010,269.00
83,098.120 LINK
0.7324%
30
Bitexen
LINK-USDT$12.16
0.0046260 Eth
$973,341.00
80,016.880 LINK
0.7052%
31
Azbit
LINK-ETH$12.17
0.0046280 Eth
$944,673.00
78,151.360 LINK
0.6888%
32
FMCPAY
LINK-USDT$12.16
0.0046236 Eth
$928,579.00
77,163.734 LINK
0.6801%
33
Bitvavo
LINK-EUR$12.17
0.0046296 Eth
$758,341.00
62,301.596 LINK
0.5491%
34
Dex-Trade
LINK-USDT$12.14
0.0046160 Eth
$711,938.00
58,650.270 LINK
0.5169%
35
Bithumb
LINK-KRW$12.19
0.0046328 Eth
$646,459.00
53,052.939 LINK
0.4676%
36
CoinEx
LINK-USDT$12.16
0.0046241 Eth
$620,573.00
51,297.387 LINK
0.4521%
37
FMCPAY
LINK-BTC$12.17
0.0046261 Eth
$557,399.00
46,251.300 LINK
0.4076%
38
BigONE
LINK-USDT$12.17
0.0046288 Eth
$530,869.00
43,613.810 LINK
0.3844%
39
tanX
LINK-USDC$12.20
0.0046227 Eth
$515,056.00
42,788.930 LINK
0.3771%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.16
0.0046244 Eth
$493,875.00
41,149.412 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3627%
41
FMCPAY
LINK-ETH$12.16
0.0046241 Eth
$481,698.00
39,800.640 LINK
0.3508%
42
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.14
0.0046158 Eth
$443,503.00
36,824.208 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3245%
43
WhiteBIT
LINK-EUR$12.08
0.0045944 Eth
$408,702.00
33,836.420 LINK
0.2982%
44
PointPay
LINK-USDT$12.17
0.0046274 Eth
$343,075.00
28,514.828 LINK
0.2513%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.20
0.0046386 Eth
$325,030.00
26,893.962 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2370%
46
Gemini
LINK-USD$12.14
0.0046183 Eth
$312,559.00
25,736.880 LINK
0.2268%
47
LATOKEN
LINK-USDT$12.17
0.0046260 Eth
$283,746.00
23,319.530 LINK
0.2055%
48
EXMO
LINK-USDT$12.15
0.0046209 Eth
$268,710.00
22,113.284 LINK
0.1949%
49
Phemex
LINK-USDT$12.15
0.0046199 Eth
$239,187.00
19,688.010 LINK
0.1735%
50
BitMart
LINK-BTC$12.16
0.0046257 Eth
$185,620.00
15,259.960 LINK
0.1345%
51
LATOKEN
LINK-BTC$12.15
0.0046183 Eth
$154,418.00
12,711.988 LINK
0.1120%
52
BitDelta
LINK-USDT$12.15
0.0046199 Eth
$149,857.00
12,445.000 LINK
0.1097%
53
Bitbank
LINK-JPY$12.19
0.0046330 Eth
$125,851.00
10,327.252 LINK
0.0910%
54
BYDFi
LINK-USDC$12.18
0.0046306 Eth
$121,514.00
9,979.550 LINK
0.0880%
55
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.15
0.0046184 Eth
$107,303.00
8,872.812 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0782%
56
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.14
0.0046140 Eth
$82,990.00
6,904.359 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0609%
57
Coinbase Exchange
LINK-GBP$12.17
0.0046289 Eth
$73,197.00
6,014.150 LINK
0.0530%
58
Slex
LINK-BTC$12.18
0.0046304 Eth
$72,478.00
6,003.900 LINK
0.0529%
59
WhiteBIT
LINK-TRY$12.20
0.0046418 Eth
$67,322.00
5,516.720 LINK
0.0486%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.16
0.0046222 Eth
$65,214.00
5,383.433 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0474%
61
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.14
0.0046159 Eth
$65,173.00
64,298.023 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5667%
62
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.15
0.0046226 Eth
$64,790.00
64,076.857 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5647%
63
Slex
LINK-ETH$12.18
0.0046291 Eth
$60,424.00
4,994.550 LINK
0.0440%
64
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$12.12
0.0046096 Eth
$51,439.00
4,295.369 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0379%
65
OKX
LINK-USDC$12.16
0.0046241 Eth
$42,524.00
3,549.886 LINK
0.0313%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.15
0.0046226 Eth
$38,960.00
3,244.021 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0286%
67
GMO Japan
LINK-JPY$12.22
0.0046471 Eth
$33,546.00
2,745.800 LINK
0.0242%
68
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.22
0.0046442 Eth
$27,978.00
27,538.160 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2427%
69
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.09
0.0045950 Eth
$26,637.00
2,232.313 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0197%
70
Bitso
LINK-USD$12.19
0.0046369 Eth
$24,364.00
1,998.326 LINK
0.0176%
71
Mercado Bitcoin
LINK-BRL$12.14
0.0046164 Eth
$20,555.00
1,692.767 LINK
0.0149%
72
EXMO
LINK-BTC$12.15
0.0046206 Eth
$20,474.00
1,684.586 LINK
0.0148%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.20
0.0046409 Eth
$20,335.00
1,694.216 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0149%
74
Binance US
LINK-USDT$12.16
0.0046222 Eth
$19,803.89
1,628.888 LINK
0.0144%
75
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$12.23
0.0046480 Eth
$15,475.47
1,267.616 0X5947BB275C521040051D82396192181B413227A3
0.0112%
76
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.14
0.0046175 Eth
$14,696.79
1,218.286 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0107%
77
KuCoin
LINK-KCS$12.15
0.0046176 Eth
$14,083.82
1,159.558 LINK
0.0102%
78
Tokpie
LINK-USDT$12.19
0.0046372 Eth
$12,622.54
1,035.254 LINK
0.0091%
79
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.15
0.0046197 Eth
$10,809.56
899.810 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0079%
80
Coinone
LINK-KRW$12.20
0.0046395 Eth
$9,268.45
759.689 LINK
0.0067%
81
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$12.16
0.0046237 Eth
$8,775.16
13.874 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
82
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X68F180FCCE6836688E9084F035309E29BF0A2095$12.13
0.0046123 Eth
$7,916.81
685.823 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0060%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.14
0.0046158 Eth
$6,451.41
6,345.373 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0559%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$12.19
0.0046378 Eth
$5,894.30
488.856 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0043%
85
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.14
0.0046167 Eth
$5,823.22
507.564 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0045%
86
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.14
0.0046158 Eth
$5,051.97
419.892 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0037%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$12.21
0.0046423 Eth
$4,687.70
387.585 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0034%
88
CoinEx
LINK-USDC$12.22
0.0046463 Eth
$4,510.63
374.733 LINK
0.0033%
89
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$12.12
0.0046100 Eth
$3,201.50
3,037.902 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0268%
90
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$12.16
0.0046216 Eth
$3,184.20
273.309 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0024%
91
CoinEx
LINK-BTC$12.17
0.0046293 Eth
$2,193.76
182.322 LINK
0.0016%
92
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.21
0.0046458 Eth
$1,972.95
164.365 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0014%
93
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.13
0.0046151 Eth
$1,665.98
138.284 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0012%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$12.22
0.0046488 Eth
$1,530.78
127.298 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0011%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$12.15
0.0046216 Eth
$637.57
52.332 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
96
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.15
0.0046232 Eth
$471.50
463.264 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0041%
97
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$12.15
0.0046195 Eth
$352.10
29.775 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0003%
98
Solidly V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.16
0.0046213 Eth
$279.60
23.217 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0002%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XB33EAAD8D922B1083446DC23F610C2567FB5180F$12.12
0.0046090 Eth
$142.69
11.672 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$12.16
0.0046245 Eth
$86.38
7.185 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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