ETH Price: $2,411.59 (-1.25%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,541 ( 0.016%)

Market

Price

$10.52 @ 0.004362 ETH (-3.42%)

Onchain Market Cap

$10,520,000,000.00

Circulating Supply Market Cap

$6,596,372,563.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
7.92461367 LINK

Value
$83.37 ( ~0.0345705663743294 Eth) [0.0000%]
0xa108C1648a97C3557e878833A9E7B80D3cE96D0f
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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 9463.64% |ETH 0.0003846 1034.17%

Market

Volume (24H):$370,569,647.00
Market Capitalization:$6,596,372,563.00
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$10.53
0.0043738 Eth
$33,473,787.00
3,179,074.540 LINK
17.7466%
2
Binance
LINK-USDT$10.55
0.0043724 Eth
$26,583,148.00
2,475,542.840 LINK
13.8193%
3
Coinbase Exchange
LINK-USD$10.54
0.0043751 Eth
$12,239,513.00
1,161,354.340 LINK
6.4831%
4
WhiteBIT
LINK-USDT$10.54
0.0043742 Eth
$11,861,920.00
1,125,227.210 LINK
6.2814%
5
Bybit
LINK-USDT$10.54
0.0043662 Eth
$10,721,834.00
999,363.092 LINK
5.5788%
6
HTX
LINK-USDT$10.55
0.0043774 Eth
$10,543,365.00
980,891.086 LINK
5.4757%
7
Bitget
LINK-USDT$10.56
0.0043763 Eth
$9,286,394.00
863,788.983 LINK
4.8220%
8
P2B
LINK-USDT$10.51
0.0043701 Eth
$5,468,291.00
520,121.340 LINK
2.9035%
9
Azbit
LINK-USDT$10.47
0.0043562 Eth
$5,097,155.00
474,276.660 LINK
2.6476%
10
Slex
LINK-USDT$10.53
0.0043735 Eth
$4,856,257.00
451,852.400 LINK
2.5224%
11
BVOX
LINK-USDT$10.55
0.0043741 Eth
$4,817,049.00
448,541.150 LINK
2.5039%
12
WEEX
LINK-USDT$10.52
0.0043751 Eth
$4,277,780.00
398,795.200 LINK
2.2262%
13
Trubit
LINK-USDT$10.51
0.0043678 Eth
$3,651,695.00
340,509.730 LINK
1.9008%
14
BTSE
LINK-USDT$10.55
0.0043760 Eth
$3,511,985.00
332,842.450 LINK
1.8580%
15
DigiFinex
LINK-USDT$10.55
0.0043741 Eth
$3,097,557.00
293,482.670 LINK
1.6383%
16
Biconomy.com
LINK-USDT$10.56
0.0043767 Eth
$3,080,201.00
286,422.930 LINK
1.5989%
17
KuCoin
LINK-USDT$10.55
0.0043702 Eth
$3,076,526.00
291,720.688 LINK
1.6285%
18
Upbit
LINK-KRW$10.62
0.0043999 Eth
$2,844,355.00
267,914.543 LINK
1.4956%
19
Deepcoin
LINK-USDT$10.55
0.0043735 Eth
$2,583,587.00
241,367.844 LINK
1.3474%
20
XT.COM
LINK-USDT$10.51
0.0043652 Eth
$2,392,333.00
222,844.660 LINK
1.2440%
21
ProBit Global
LINK-USDT$10.56
0.0043746 Eth
$2,290,013.00
216,946.010 LINK
1.2111%
22
OKX
LINK-USDT$10.55
0.0043729 Eth
$2,237,357.00
208,669.471 LINK
1.1649%
23
CoinW
LINK-USDT$10.54
0.0043675 Eth
$2,156,548.00
204,637.200 LINK
1.1424%
24
AscendEX (BitMax)
LINK-USDT$10.55
0.0043732 Eth
$1,643,450.00
155,746.500 LINK
0.8694%
25
Gate.io
LINK-USDT$10.55
0.0043773 Eth
$1,467,271.00
136,841.850 LINK
0.7639%
26
BYDFi
LINK-USDT$10.47
0.0043557 Eth
$1,257,003.00
120,016.410 LINK
0.6700%
27
Bullish
LINK-USDC$10.57
0.0043788 Eth
$1,176,931.00
109,598.808 LINK
0.6118%
28
FameEX
LINK-USDT$10.56
0.0043745 Eth
$1,060,503.00
98,756.105 LINK
0.5513%
29
Hotcoin
LINK-USDT$10.54
0.0043684 Eth
$1,022,469.00
97,002.910 LINK
0.5415%
30
FMCPAY
LINK-USDT$10.54
0.0043682 Eth
$863,746.00
80,519.536 LINK
0.4495%
31
Dex-Trade
LINK-USDT$10.56
0.0043767 Eth
$858,482.00
81,290.980 LINK
0.4538%
32
Azbit
LINK-ETH$10.47
0.0043534 Eth
$834,412.00
78,818.459 LINK
0.4400%
33
LATOKEN
LINK-USDT$10.53
0.0043713 Eth
$833,516.00
79,157.084 LINK
0.4419%
34
tanX
LINK-USDC$10.58
0.0043797 Eth
$635,919.00
59,118.000 LINK
0.3300%
35
CoinEx
LINK-USDT$10.53
0.0043687 Eth
$612,881.00
57,048.938 LINK
0.3185%
36
EXMO
LINK-USDT$10.57
0.0043806 Eth
$512,882.00
48,521.968 LINK
0.2709%
37
WhiteBIT
LINK-BTC$10.53
0.0043707 Eth
$508,688.00
48,292.990 LINK
0.2696%
38
FMCPAY
LINK-BTC$10.54
0.0043681 Eth
$469,074.00
44,439.400 LINK
0.2481%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.52
0.0043595 Eth
$446,634.00
42,611.540 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2379%
40
PointPay
LINK-USDT$10.50
0.0043668 Eth
$438,061.00
40,831.224 LINK
0.2279%
41
Pionex
LINK-USDT$10.53
0.0043738 Eth
$391,950.00
36,497.340 LINK
0.2037%
42
Bithumb
LINK-KRW$10.63
0.0044060 Eth
$363,425.00
34,183.866 LINK
0.1908%
43
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.45
0.0043392 Eth
$327,058.00
31,018.810 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1732%
44
FMCPAY
LINK-ETH$10.49
0.0043560 Eth
$323,748.00
30,562.000 LINK
0.1706%
45
BigONE
LINK-USDT$10.57
0.0043869 Eth
$318,897.00
30,163.550 LINK
0.1684%
46
Phemex
LINK-USDT$10.54
0.0043731 Eth
$287,974.00
27,310.390 LINK
0.1525%
47
WhiteBIT
LINK-EUR$10.54
0.0043703 Eth
$257,528.00
24,438.470 LINK
0.1364%
48
itBit
LINK-USD$10.55
0.0043776 Eth
$253,457.00
24,024.351 LINK
0.1341%
49
ProBit Global
LINK-BTC$10.54
0.0043697 Eth
$216,049.00
20,490.942 LINK
0.1144%
50
BitMart
LINK-BTC$10.53
0.0043633 Eth
$175,121.00
16,633.340 LINK
0.0929%
51
LATOKEN
LINK-BTC$10.51
0.0043643 Eth
$170,150.00
16,184.623 LINK
0.0903%
52
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.50
0.0043595 Eth
$161,924.00
15,286.657 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0853%
53
BitDelta
LINK-USDT$10.51
0.0043652 Eth
$130,241.00
12,120.000 LINK
0.0677%
54
Hotcoin
LINK-ETH$10.53
0.0043661 Eth
$122,970.00
11,672.570 LINK
0.0652%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.49
0.0043467 Eth
$120,654.00
11,399.071 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0636%
56
Bitci TR
LINK-TRY$10.58
0.0043884 Eth
$110,596.00
10,254.720 LINK
0.0572%
57
Bitbank
LINK-JPY$10.51
0.0043568 Eth
$98,162.00
9,336.363 LINK
0.0521%
58
Slex
LINK-ETH$10.50
0.0043600 Eth
$97,440.00
9,204.240 LINK
0.0514%
59
Hotcoin
LINK-BTC$10.54
0.0043697 Eth
$92,934.00
8,814.050 LINK
0.0492%
60
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.52
0.0043670 Eth
$83,894.00
7,927.189 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0443%
61
BYDFi
LINK-USDC$10.48
0.0043604 Eth
$83,093.00
7,926.620 LINK
0.0442%
62
Coinbase Exchange
LINK-ETH$10.49
0.0043612 Eth
$68,964.00
6,573.080 LINK
0.0367%
63
Bitget
LINK-EUR$10.54
0.0043668 Eth
$59,987.00
5,594.490 LINK
0.0312%
64
WhiteBIT
LINK-TRY$10.56
0.0043831 Eth
$52,532.00
4,973.120 LINK
0.0278%
65
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.50
0.0043587 Eth
$51,905.00
4,870.526 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0272%
66
Slex
LINK-BTC$10.52
0.0043695 Eth
$50,391.00
4,781.600 LINK
0.0267%
67
OKX
LINK-USDC$10.48
0.0043425 Eth
$44,392.00
4,172.293 LINK
0.0233%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.49
0.0043620 Eth
$39,912.00
3,719.175 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0208%
69
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.45
0.0043392 Eth
$35,788.00
36,635.266 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2045%
70
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.49
0.0043459 Eth
$34,546.00
35,391.867 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1976%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.51
0.0043614 Eth
$28,950.00
2,728.893 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0152%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.49
0.0043620 Eth
$25,738.00
2,467.987 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0138%
73
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.45
0.0043392 Eth
$24,090.00
2,272.023 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0127%
74
EXMO
LINK-BTC$10.51
0.0043624 Eth
$21,699.00
2,063.988 LINK
0.0115%
75
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.45
0.0043399 Eth
$20,458.00
1,950.369 0X5947BB275C521040051D82396192181B413227A3
0.0109%
76
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$10.45
0.0043366 Eth
$18,932.58
1,799.985 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0100%
77
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.47
0.0043452 Eth
$18,822.37
1,800.916 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0101%
78
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.50
0.0043595 Eth
$17,342.12
17,715.339 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0989%
79
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.45
0.0043373 Eth
$16,833.47
1,604.314 0X5947BB275C521040051D82396192181B413227A3
0.0090%
80
Nonkyc.io
LINK-BTC$10.51
0.0043537 Eth
$14,537.91
1,377.380 LINK
0.0077%
81
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.51
0.0043635 Eth
$12,123.33
1,144.083 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0064%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.50
0.0043558 Eth
$10,187.38
949.647 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0053%
83
Coinone
LINK-KRW$10.61
0.0044000 Eth
$9,775.01
921.368 LINK
0.0051%
84
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.56
0.0043797 Eth
$7,696.60
745.668 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0042%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.45
0.0043392 Eth
$4,269.62
4,359.149 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0243%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.49
0.0043530 Eth
$4,084.08
388.321 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0022%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.54
0.0043876 Eth
$4,078.49
385.923 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0022%
88
CoinEx
LINK-BTC$10.53
0.0043683 Eth
$2,411.09
228.739 LINK
0.0013%
89
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.50
0.0043516 Eth
$2,352.89
222.454 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0012%
90
CoinEx
LINK-USDC$10.48
0.0043514 Eth
$1,959.96
182.555 LINK
0.0010%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.50
0.0043573 Eth
$1,086.38
101.076 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.55
0.0043755 Eth
$816.60
75.585 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.51
0.0043594 Eth
$745.08
70.004 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0004%
94
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$10.45
0.0043298 Eth
$707.41
723.596 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0040%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XB33EAAD8D922B1083446DC23F610C2567FB5180F$10.52
0.0043705 Eth
$545.51
50.370 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
96
Solidly V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.50
0.0043561 Eth
$229.02
21.762 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0001%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.39
0.0043167 Eth
$211.42
20.186 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
98
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.45
0.0043381 Eth
$160.26
305.601 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0017%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X7130D2A12B9BCBFAE4F2634D864A1EE1CE3EAD9C$10.46
0.0043506 Eth
$141.67
13.399 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0001%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$10.54
0.0043754 Eth
$116.14
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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