ETH Price: $2,699.89 (+1.52%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

734,720 ( 0.017%)

Market

Price

$19.14 @ 0.007089 ETH (+3.57%)

Onchain Market Cap

$19,140,000,000.00

Circulating Supply Market Cap

$12,190,825,220.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x04abee536e802d6ed81a431d84a7dccbf8e0b495
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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 17300% |ETH 0.0003846 1743.21%

Market

Volume (24H):$442,118,042.00
Market Capitalization:$12,190,825,220.00
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
Coinbase Exchange
LINK-USD$19.21
0.0071250 Eth
$30,022,465.00
1,563,100.180 LINK
14.5038%
2
MEXC
LINK-USDT$19.11
0.0070912 Eth
$25,290,103.00
1,323,225.470 LINK
12.2780%
3
Bybit
LINK-USDT$19.22
0.0071235 Eth
$22,303,429.00
1,194,622.595 LINK
11.0847%
4
HTX
LINK-USDT$19.22
0.0071238 Eth
$19,033,127.00
1,019,408.775 LINK
9.4589%
5
P2B
LINK-USDT$19.14
0.0070896 Eth
$9,430,677.00
492,685.880 LINK
4.5716%
6
OKX
LINK-USDT$19.22
0.0071252 Eth
$6,800,397.00
362,631.183 LINK
3.3648%
7
Gate.io
LINK-USDT$19.12
0.0070948 Eth
$5,220,861.00
279,270.380 LINK
2.5913%
8
KuCoin
LINK-USDT$19.16
0.0071075 Eth
$4,643,444.00
242,353.235 LINK
2.2488%
9
XT.COM
LINK-USDT$19.20
0.0071230 Eth
$4,406,242.00
235,350.300 LINK
2.1838%
10
BTSE
LINK-USDT$19.11
0.0070788 Eth
$4,378,320.00
229,083.552 LINK
2.1256%
11
Coinstore
LINK-USDT$19.19
0.0071144 Eth
$3,971,311.00
212,153.730 LINK
1.9685%
12
WhiteBIT
LINK-USDT$19.05
0.0070831 Eth
$3,913,775.00
205,459.680 LINK
1.9064%
13
Binance
LINK-FDUSD$19.29
0.0071520 Eth
$3,895,906.00
207,611.490 LINK
1.9264%
14
Hotcoin
LINK-USDT$19.13
0.0070986 Eth
$3,796,146.00
198,413.780 LINK
1.8410%
15
CoinW
LINK-USDT$19.14
0.0070912 Eth
$3,576,819.00
186,875.220 LINK
1.7340%
16
Bitunix
LINK-USDT$19.19
0.0071137 Eth
$3,375,967.00
175,885.630 LINK
1.6320%
17
Azbit
LINK-USDT$19.13
0.0070897 Eth
$2,621,612.00
140,050.824 LINK
1.2995%
18
Kraken
LINK-USD$19.19
0.0071119 Eth
$2,612,459.00
136,120.515 LINK
1.2630%
19
BYDFi
LINK-USDT$19.19
0.0071053 Eth
$2,565,668.00
133,723.860 LINK
1.2408%
20
LATOKEN
LINK-USDT$19.12
0.0070860 Eth
$2,158,402.00
112,881.724 LINK
1.0474%
21
QMall
LINK-USDT$19.06
0.0070941 Eth
$1,752,350.00
93,637.884 LINK
0.8689%
22
FMCPAY
LINK-USDT$19.12
0.0070939 Eth
$1,723,518.00
92,228.467 LINK
0.8558%
23
Dex-Trade
LINK-USDT$19.03
0.0070780 Eth
$1,517,702.00
79,745.960 LINK
0.7399%
24
Coinbase Exchange
LINK-EUR$19.22
0.0071217 Eth
$1,478,568.00
76,934.430 LINK
0.7139%
25
Biconomy.com
LINK-USDT$19.14
0.0070996 Eth
$1,374,469.00
73,523.840 LINK
0.6822%
26
Bitvavo
LINK-EUR$19.14
0.0070996 Eth
$1,320,784.00
69,014.333 LINK
0.6404%
27
FMCPAY
LINK-ETH$19.14
0.0070884 Eth
$1,173,053.00
62,250.880 LINK
0.5776%
28
CoinEx
LINK-USDT$19.14
0.0070876 Eth
$1,057,342.00
56,602.426 LINK
0.5252%
29
FMCPAY
LINK-BTC$19.11
0.0070885 Eth
$1,007,889.00
53,810.700 LINK
0.4993%
30
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.10
0.0070860 Eth
$965,612.00
51,259.004 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4756%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.15
0.0071014 Eth
$955,826.00
50,618.633 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4697%
32
Coinbase Exchange
LINK-GBP$19.20
0.0071147 Eth
$881,445.00
45,908.890 LINK
0.4260%
33
Trubit
LINK-USDT$19.14
0.0070884 Eth
$742,804.00
39,818.920 LINK
0.3695%
34
tanX
LINK-USDC$19.14
0.0070917 Eth
$734,340.00
39,232.970 LINK
0.3640%
35
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.11
0.0070831 Eth
$667,962.00
35,427.302 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3287%
36
PointPay
LINK-USDT$19.09
0.0070750 Eth
$657,167.00
35,074.833 LINK
0.3255%
37
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.20
0.0071241 Eth
$629,943.00
34,642.310 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.3214%
38
WhiteBIT
LINK-BTC$19.15
0.0070948 Eth
$541,786.00
28,293.430 LINK
0.2625%
39
EXMO
LINK-USDT$19.13
0.0070969 Eth
$521,073.00
27,241.699 LINK
0.2528%
40
Bitbank
LINK-JPY$19.17
0.0071123 Eth
$508,831.00
26,539.479 LINK
0.2463%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.15
0.0071027 Eth
$490,006.00
25,921.746 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2405%
42
LATOKEN
LINK-BTC$19.10
0.0070859 Eth
$484,007.00
25,339.333 LINK
0.2351%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.09
0.0070825 Eth
$473,867.00
25,307.266 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2348%
44
BigONE
LINK-USDT$19.04
0.0070563 Eth
$462,609.00
24,294.760 LINK
0.2254%
45
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.10
0.0070826 Eth
$430,983.00
421,895.396 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.9147%
46
Binance
LINK-TRY$19.13
0.0070846 Eth
$424,998.00
22,810.050 LINK
0.2117%
47
Binance
LINK-EUR$19.17
0.0071103 Eth
$415,291.00
22,139.200 LINK
0.2054%
48
Bitbegin
LINK-USDT$19.15
0.0070932 Eth
$400,385.00
21,465.164 LINK
0.1992%
49
QMall
LINK-USDC$19.09
0.0070737 Eth
$381,862.00
20,405.558 LINK
0.1893%
50
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.20
0.0071205 Eth
$363,155.00
35,970.850 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3338%
51
Gemini
LINK-USD$19.19
0.0071125 Eth
$344,096.00
17,934.826 LINK
0.1664%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.20
0.0071217 Eth
$344,079.00
18,170.714 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1686%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.15
0.0071038 Eth
$302,786.00
16,244.394 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1507%
54
BitMart
LINK-BTC$19.11
0.0070913 Eth
$260,748.00
13,641.140 LINK
0.1266%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.14
0.0070980 Eth
$259,353.00
13,744.812 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1275%
56
OKX
LINK-USDC$19.09
0.0070817 Eth
$228,614.00
12,232.337 LINK
0.1135%
57
Coinbase Exchange
LINK-USDT$19.24
0.0071282 Eth
$221,848.00
11,531.068 LINK
0.1070%
58
BitDelta
LINK-USDT$19.08
0.0070797 Eth
$216,580.00
11,622.000 LINK
0.1078%
59
KuCoin
LINK-BTC$19.11
0.0070886 Eth
$210,646.00
11,023.526 LINK
0.1023%
60
Slex
LINK-ETH$19.14
0.0070904 Eth
$160,519.00
8,520.320 LINK
0.0791%
61
CoinTR
LINK-TRY$19.09
0.0070715 Eth
$148,861.00
7,995.750 LINK
0.0742%
62
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.19
0.0071187 Eth
$147,625.00
7,935.006 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0736%
63
BitStorage
LINK-ETH$19.01
0.0070717 Eth
$136,510.00
7,179.840 LINK
0.0666%
64
Hotcoin
LINK-BTC$19.12
0.0070935 Eth
$131,313.00
6,868.260 LINK
0.0637%
65
WhiteBIT
LINK-TRY$19.07
0.0070677 Eth
$126,055.00
6,609.530 LINK
0.0613%
66
BYDFi
LINK-USDC$19.23
0.0071202 Eth
$124,186.00
6,459.090 LINK
0.0599%
67
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.24
0.0071268 Eth
$120,575.00
6,442.914 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0598%
68
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.15
0.0071014 Eth
$101,530.00
98,886.263 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.9175%
69
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$19.05
0.0070657 Eth
$97,385.00
5,187.712 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0481%
70
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.10
0.0070866 Eth
$88,586.00
4,914.083 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0456%
71
Kanga
LINK-PLN$19.25
0.0071336 Eth
$82,282.00
0.000 LINK
0.0000%
72
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.18
0.0071162 Eth
$80,163.00
4,341.596 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0403%
73
Bitkub
LINK-THB$19.19
0.0071098 Eth
$76,815.00
4,002.796 LINK
0.0371%
74
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$19.13
0.0070932 Eth
$72,499.00
3,837.743 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0356%
75
BitMart
LINK-ETH$19.09
0.0070827 Eth
$69,283.00
3,628.940 LINK
0.0337%
76
Bitso
LINK-USD$19.10
0.0070774 Eth
$64,295.00
3,365.792 LINK
0.0312%
77
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.14
0.0071006 Eth
$62,500.00
61,141.922 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5673%
78
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.15
0.0070948 Eth
$57,543.00
3,040.812 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0282%
79
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$19.13
0.0070967 Eth
$51,747.00
67.358 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0006%
80
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.11
0.0070898 Eth
$50,530.00
2,677.257 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0248%
81
Mercado Bitcoin
LINK-BRL$19.13
0.0070908 Eth
$45,333.00
2,370.059 LINK
0.0220%
82
Hotcoin
LINK-ETH$19.12
0.0070938 Eth
$36,276.00
1,896.990 LINK
0.0176%
83
Crypto.com Exchange
LINK-BTC$18.95
0.0070243 Eth
$33,463.00
1,766.040 LINK
0.0164%
84
EXMO
LINK-BTC$19.18
0.0071155 Eth
$31,602.00
1,647.530 LINK
0.0153%
85
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$19.13
0.0070949 Eth
$23,583.00
1,347.361 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0125%
86
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$19.18
0.0071150 Eth
$22,602.00
1,210.182 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0112%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.21
0.0071243 Eth
$20,512.00
1,083.977 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0101%
88
Gemini
LINK-BTC$19.23
0.0071298 Eth
$18,155.96
944.022 LINK
0.0088%
89
Dex-Trade
LINK-ETH$19.14
0.0070837 Eth
$16,605.01
867.610 LINK
0.0081%
90
Uniswap V3 (BSC)
0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$19.18
0.0071160 Eth
$14,178.21
1,728.047 0XCF6BB5389C92BDDA8A3747DDB454CB7A64626C63
0.0160%
91
Biswap V3
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.17
0.0071055 Eth
$13,860.15
769.448 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0071%
92
Uniswap V3 (Arbitrum One)
0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.11
0.0070909 Eth
$12,894.07
49.164 0XBA5DDD1F9D7F570DC94A51479A000E3BCE967196
0.0005%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$19.22
0.0071199 Eth
$12,203.93
652.354 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0061%
94
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.16
0.0071074 Eth
$11,480.62
612.036 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0057%
95
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.12
0.0070946 Eth
$11,204.06
10,947.449 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1016%
96
CoinEx
LINK-USDC$19.15
0.0070942 Eth
$8,520.28
455.135 LINK
0.0042%
97
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.12
0.0070835 Eth
$6,848.17
378.571 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0035%
98
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.10
0.0070838 Eth
$6,417.03
339.728 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0032%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$19.18
0.0071147 Eth
$6,059.85
321.421 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0030%
100
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.17
0.0071107 Eth
$5,861.64
310.833 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0029%

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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