ETH Price: $3,350.01 (-1.15%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,093 ( 0.031%)

Market

Price

$21.23 @ 0.006337 ETH (-3.79%)

Onchain Market Cap

$21,230,000,000.00

Circulating Supply Market Cap

$13,440,905,253.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x082252d528300db9809cb2d90c285028136bdacc
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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 19200% |ETH 0.0003846 1547.69%

Market

Volume (24H):$636,155,384.00
Market Capitalization:$13,440,905,253.00
Circulating Supply:631,099,972.00 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$21.25
0.0063500 Eth
$23,001,007.00
1,082,451.290 LINK
9.0570%
2
Slex
LINK-USDT$21.27
0.0063421 Eth
$22,620,140.00
1,043,145.970 LINK
8.7281%
3
WhiteBIT
LINK-USDT$21.22
0.0063388 Eth
$17,529,749.00
826,232.520 LINK
6.9132%
4
MEXC
LINK-USDT$21.25
0.0063485 Eth
$15,214,577.00
715,845.420 LINK
5.9896%
5
Bybit
LINK-USDT$21.24
0.0063373 Eth
$15,012,573.00
691,240.288 LINK
5.7837%
6
P2B
LINK-USDT$21.30
0.0063498 Eth
$13,001,114.00
610,363.390 LINK
5.1070%
7
Gate.io
LINK-USDT$21.25
0.0063416 Eth
$9,984,299.00
460,268.680 LINK
3.8511%
8
CoinW
LINK-USDT$21.25
0.0063513 Eth
$9,938,716.00
467,628.770 LINK
3.9127%
9
OKX
LINK-USDT$21.26
0.0063435 Eth
$9,180,591.00
423,131.378 LINK
3.5404%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.20
0.0063271 Eth
$8,914,463.00
414,013.923 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.4641%
11
HTX
LINK-USDT$21.25
0.0063404 Eth
$7,520,173.00
347,018.017 LINK
2.9035%
12
DigiFinex
LINK-USDT$21.27
0.0063458 Eth
$7,369,795.00
346,557.530 LINK
2.8997%
13
Deepcoin
LINK-USDT$21.24
0.0063392 Eth
$6,190,680.00
319,797.580 LINK
2.6758%
14
XT.COM
LINK-USDT$21.22
0.0063416 Eth
$5,991,981.00
275,929.760 LINK
2.3087%
15
Azbit
LINK-USDT$21.24
0.0063425 Eth
$5,871,230.00
270,516.729 LINK
2.2634%
16
Coinstore
LINK-USDT$21.21
0.0063330 Eth
$5,277,544.00
243,353.110 LINK
2.0362%
17
Biconomy.com
LINK-USDT$21.23
0.0063407 Eth
$5,207,608.00
240,178.923 LINK
2.0096%
18
Bitunix
LINK-USDT$21.25
0.0063479 Eth
$4,752,842.00
223,726.180 LINK
1.8719%
19
Coinbase Exchange
LINK-GBP$21.25
0.0063511 Eth
$3,929,421.00
184,891.350 LINK
1.5470%
20
BYDFi
LINK-USDT$21.22
0.0063406 Eth
$3,859,973.00
181,918.910 LINK
1.5221%
21
BTSE
LINK-USDT$21.24
0.0063464 Eth
$3,773,483.00
177,626.340 LINK
1.4862%
22
LBank
LINK-USDT$21.24
0.0063388 Eth
$3,460,184.00
162,893.010 LINK
1.3629%
23
LATOKEN
LINK-USDT$21.24
0.0063392 Eth
$2,837,439.00
133,565.512 LINK
1.1176%
24
KuCoin
LINK-USDT$21.25
0.0063461 Eth
$2,595,765.00
122,138.489 LINK
1.0219%
25
QMall
LINK-USDT$21.24
0.0063392 Eth
$2,343,691.00
107,989.816 LINK
0.9036%
26
Bitvavo
LINK-EUR$21.28
0.0063458 Eth
$2,323,549.00
109,180.968 LINK
0.9135%
27
Hotcoin
LINK-USDT$21.25
0.0063422 Eth
$2,305,650.00
108,481.840 LINK
0.9077%
28
Dex-Trade
LINK-USDT$21.23
0.0063429 Eth
$1,930,633.00
90,936.740 LINK
0.7609%
29
CoinEx
LINK-USDT$21.24
0.0063342 Eth
$1,673,708.00
76,985.206 LINK
0.6441%
30
Dcoin
LINK-USDT$21.30
0.0063520 Eth
$1,637,110.00
76,851.000 LINK
0.6430%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.22
0.0063427 Eth
$1,548,958.00
71,914.256 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.6017%
32
Coinbase Exchange
LINK-USDT$21.31
0.0063682 Eth
$1,083,232.00
50,841.731 LINK
0.4254%
33
Bybit
LINK-USDC$21.22
0.0063325 Eth
$1,015,386.00
46,696.866 LINK
0.3907%
34
EXMO
LINK-USDT$21.27
0.0063522 Eth
$908,989.00
42,729.723 LINK
0.3575%
35
PointPay
LINK-USDT$21.34
0.0063577 Eth
$888,682.00
40,927.008 LINK
0.3424%
36
Azbit
LINK-ETH$21.21
0.0063346 Eth
$822,287.00
38,392.197 LINK
0.3212%
37
tanX
LINK-USDC$21.29
0.0063606 Eth
$758,469.00
34,879.570 LINK
0.2918%
38
Phemex
LINK-USDT$21.25
0.0063417 Eth
$724,196.00
34,076.520 LINK
0.2851%
39
WhiteBIT
LINK-BTC$21.23
0.0063378 Eth
$643,936.00
30,338.550 LINK
0.2538%
40
Coinbase Exchange
LINK-EUR$21.23
0.0063454 Eth
$614,809.00
28,954.430 LINK
0.2423%
41
Bitbank
LINK-JPY$21.20
0.0063290 Eth
$604,828.00
28,535.894 LINK
0.2388%
42
WhiteBIT
LINK-TRY$21.34
0.0063757 Eth
$514,024.00
24,087.280 LINK
0.2015%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.19
0.0063299 Eth
$511,432.00
23,946.036 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2004%
44
Binance
LINK-TRY$21.46
0.0063926 Eth
$427,696.00
19,578.980 LINK
0.1638%
45
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.20
0.0063353 Eth
$426,820.00
436,623.450 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.6533%
46
BigONE
LINK-USDT$21.17
0.0063196 Eth
$371,017.00
17,521.890 LINK
0.1466%
47
HashKey Exchange
LINK-USD$21.27
0.0063547 Eth
$368,231.00
17,111.367 LINK
0.1432%
48
Slex
LINK-ETH$21.30
0.0063509 Eth
$357,765.00
16,648.120 LINK
0.1393%
49
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.21
0.0063367 Eth
$346,937.00
16,175.162 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1353%
50
Bitbegin
LINK-USDT$21.25
0.0063495 Eth
$332,757.00
15,336.817 LINK
0.1283%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.20
0.0063340 Eth
$323,310.00
15,271.067 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1278%
52
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.20
0.0063271 Eth
$307,953.00
23,532.164 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1969%
53
BitMart
LINK-BTC$21.22
0.0063402 Eth
$280,203.00
13,202.640 LINK
0.1105%
54
QMall
LINK-USDC$21.26
0.0063432 Eth
$271,748.00
12,565.581 LINK
0.1051%
55
Binance
LINK-EUR$21.26
0.0063386 Eth
$268,359.00
12,333.220 LINK
0.1032%
56
Gemini
LINK-USD$21.22
0.0063313 Eth
$235,588.00
11,103.664 LINK
0.0929%
57
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$21.21
0.0063376 Eth
$190,526.00
8,763.638 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0733%
58
GMO Japan
LINK-JPY$21.25
0.0063396 Eth
$157,077.00
7,393.600 LINK
0.0619%
59
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.20
0.0063342 Eth
$151,928.00
7,083.182 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0593%
60
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.18
0.0063283 Eth
$143,178.00
146,883.221 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.2290%
61
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$21.21
0.0063407 Eth
$141,107.00
6,346.371 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0531%
62
Coinbase Exchange
LINK-BTC$21.22
0.0063385 Eth
$139,585.00
6,577.820 LINK
0.0550%
63
Coinbase Exchange
LINK-ETH$21.23
0.0063359 Eth
$138,551.00
6,525.410 LINK
0.0546%
64
BitStorage
LINK-ETH$21.31
0.0063526 Eth
$137,009.00
6,429.510 LINK
0.0538%
65
BitMart
LINK-ETH$21.22
0.0063415 Eth
$124,370.00
5,860.820 LINK
0.0490%
66
LATOKEN
LINK-BTC$21.21
0.0063289 Eth
$108,974.00
5,138.094 LINK
0.0430%
67
OKX
LINK-USDC$21.22
0.0063336 Eth
$102,978.00
4,741.936 LINK
0.0397%
68
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.21
0.0063373 Eth
$89,929.00
4,152.124 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0347%
69
Hotcoin
LINK-BTC$21.22
0.0063411 Eth
$74,586.00
3,514.960 LINK
0.0294%
70
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.22
0.0063373 Eth
$71,770.00
3,343.464 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0280%
71
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$21.30
0.0063565 Eth
$71,013.00
3,296.959 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0276%
72
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.20
0.0063271 Eth
$69,767.00
3,230.777 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0270%
73
Bitso
LINK-USD$21.34
0.0063626 Eth
$62,972.00
2,951.162 LINK
0.0247%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.26
0.0063515 Eth
$57,738.00
2,728.367 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0228%
75
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.36
0.0063797 Eth
$53,226.00
2,529.795 0X5947BB275C521040051D82396192181B413227A3
0.0212%
76
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.30
0.0063568 Eth
$47,362.00
2,205.871 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0185%
77
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$21.25
0.0063490 Eth
$37,538.00
2,056.479 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0172%
78
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.21
0.0063407 Eth
$33,355.00
34,303.511 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2870%
79
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.42
0.0063916 Eth
$31,373.00
1,490.043 0X5947BB275C521040051D82396192181B413227A3
0.0125%
80
Hotcoin
LINK-ETH$21.28
0.0063460 Eth
$25,508.00
1,198.550 LINK
0.0100%
81
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.33
0.0063656 Eth
$19,602.21
928.139 0X5947BB275C521040051D82396192181B413227A3
0.0078%
82
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$21.30
0.0063571 Eth
$16,643.33
765.751 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0064%
83
CoinEx
LINK-USDC$21.30
0.0063648 Eth
$13,386.12
621.615 LINK
0.0052%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$21.20
0.0063338 Eth
$13,306.28
611.713 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0051%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$21.20
0.0063342 Eth
$10,691.67
498.598 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0042%
86
KuCoin
LINK-KCS$21.31
0.0063618 Eth
$10,367.33
486.606 LINK
0.0041%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.27
0.0063411 Eth
$8,553.95
8,764.699 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0733%
88
Bitexen
LINK-TRY$21.20
0.0063231 Eth
$7,568.57
356.993 LINK
0.0030%
89
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$21.26
0.0063478 Eth
$6,657.56
309.350 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0026%
90
CoinEx
LINK-BTC$21.13
0.0063130 Eth
$6,645.30
313.303 LINK
0.0026%
91
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$21.20
0.0063345 Eth
$6,410.83
8.450 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
92
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.23
0.0063361 Eth
$5,216.70
243.155 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0020%
93
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.33
0.0063726 Eth
$3,637.89
167.537 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0014%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$21.36
0.0063665 Eth
$2,358.43
111.994 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0009%
95
Ace
LINK-USDT$21.34
0.0063623 Eth
$2,264.40
104.190 LINK
0.0009%
96
Lydia Finance
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.30
0.0063631 Eth
$2,054.76
97.436 0X5947BB275C521040051D82396192181B413227A3
0.0008%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$21.28
0.0063585 Eth
$1,732.29
81.040 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0007%
98
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$21.21
0.0063396 Eth
$1,358.76
63.774 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$21.25
0.0063512 Eth
$850.25
39.399 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0003%
100
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$21.26
0.0063433 Eth
$826.47
38.011 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0003%

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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