ETH Price: $3,385.96 (+1.18%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,867 ( 0.001%)

Market

Price

$21.57 @ 0.006370 ETH (+1.32%)

Onchain Market Cap

$21,570,000,000.00

Circulating Supply Market Cap

$13,619,110,351.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x124d6a3559fb1f90d353d442ef56f552f1246bf8
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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 19509.09% |ETH 0.0003846 1556.27%

Market

Volume (24H):$889,478,949.00
Market Capitalization:$13,619,110,351.00
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
Websea
LINK-USDT$21.54
0.0063566 Eth
$94,152,443.00
0.000 LINK
0.0000%
2
Binance
LINK-USDT$21.60
0.0063710 Eth
$91,290,056.00
4,220,727.700 LINK
26.5130%
3
Coinbase Exchange
LINK-USD$21.55
0.0063605 Eth
$36,833,171.00
1,709,354.530 LINK
10.7375%
4
Bybit
LINK-USDT$21.54
0.0063596 Eth
$24,650,677.00
1,139,943.567 LINK
7.1607%
5
WhiteBIT
LINK-USDT$21.55
0.0063604 Eth
$20,614,956.00
956,619.680 LINK
6.0091%
6
CoinW
LINK-USDT$21.55
0.0063586 Eth
$15,465,174.00
717,772.820 LINK
4.5088%
7
OKX
LINK-USDT$21.54
0.0063579 Eth
$13,567,388.00
627,000.750 LINK
3.9386%
8
DigiFinex
LINK-USDT$21.52
0.0063546 Eth
$11,475,383.00
533,127.440 LINK
3.3489%
9
XT.COM
LINK-USDT$21.55
0.0063610 Eth
$9,064,189.00
419,010.210 LINK
2.6321%
10
Azbit
LINK-USDT$21.55
0.0063619 Eth
$9,031,313.00
417,515.566 LINK
2.6227%
11
Bitstamp
LINK-EUR$21.54
0.0063600 Eth
$8,844,068.00
410,507.323 LINK
2.5786%
12
Coinstore
LINK-USDT$21.51
0.0063509 Eth
$8,059,948.00
372,882.960 LINK
2.3423%
13
HTX
LINK-USDT$21.54
0.0063591 Eth
$7,772,077.00
358,878.567 LINK
2.2543%
14
Bitunix
LINK-USDT$21.55
0.0063608 Eth
$7,342,526.00
340,655.510 LINK
2.1399%
15
Biconomy.com
LINK-USDT$21.53
0.0063559 Eth
$5,910,958.00
272,990.550 LINK
1.7148%
16
BYDFi
LINK-USDT$21.54
0.0063585 Eth
$5,906,867.00
274,175.620 LINK
1.7223%
17
KuCoin
LINK-USDT$21.56
0.0063635 Eth
$5,149,244.00
238,876.619 LINK
1.5005%
18
Coinbase Exchange
LINK-GBP$21.55
0.0063606 Eth
$4,599,775.00
213,462.310 LINK
1.3409%
19
LATOKEN
LINK-USDT$21.54
0.0063535 Eth
$4,420,906.00
205,200.505 LINK
1.2890%
20
BTSE
LINK-USDT$21.58
0.0063632 Eth
$4,193,320.00
194,272.620 LINK
1.2203%
21
Bitstamp
LINK-USD$21.54
0.0063588 Eth
$4,068,636.00
188,887.465 LINK
1.1865%
22
LBank
LINK-USDT$21.59
0.0063673 Eth
$3,985,030.00
184,544.720 LINK
1.1592%
23
Bitvavo
LINK-EUR$21.55
0.0063596 Eth
$2,984,797.00
138,509.185 LINK
0.8701%
24
Dex-Trade
LINK-USDT$21.55
0.0063620 Eth
$2,981,981.00
138,350.947 LINK
0.8691%
25
Kraken
LINK-USD$21.55
0.0063613 Eth
$2,503,006.00
116,162.331 LINK
0.7297%
26
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.60
0.0063770 Eth
$2,103,897.00
96,480.667 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.6061%
27
CoinEx
LINK-USDT$21.54
0.0063586 Eth
$1,970,682.00
91,050.253 LINK
0.5719%
28
Hotcoin
LINK-USDT$21.59
0.0063663 Eth
$1,898,905.00
87,949.910 LINK
0.5525%
29
Dcoin
LINK-USDT$21.60
0.0063676 Eth
$1,807,706.00
83,709.000 LINK
0.5258%
30
PointPay
LINK-USDT$21.59
0.0063641 Eth
$1,525,733.00
70,522.554 LINK
0.4430%
31
Bybit
LINK-USDC$21.54
0.0063599 Eth
$1,414,733.00
65,287.479 LINK
0.4101%
32
EXMO
LINK-USDT$21.54
0.0063587 Eth
$1,341,692.00
62,285.700 LINK
0.3913%
33
Coinbase Exchange
LINK-EUR$21.53
0.0063563 Eth
$1,302,431.00
60,483.070 LINK
0.3799%
34
Phemex
LINK-USDT$21.58
0.0063621 Eth
$1,062,343.00
49,218.930 LINK
0.3092%
35
Kraken
LINK-USDT$21.54
0.0063590 Eth
$948,449.00
44,033.050 LINK
0.2766%
36
tanX
LINK-USDC$21.59
0.0063718 Eth
$834,999.00
38,426.070 LINK
0.2414%
37
WhiteBIT
LINK-BTC$21.54
0.0063579 Eth
$783,777.00
36,381.910 LINK
0.2285%
38
BitStorage
LINK-USDT$21.55
0.0063628 Eth
$734,239.00
34,067.540 LINK
0.2140%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.63
0.0063845 Eth
$667,558.00
30,641.716 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1925%
40
EarnBIT
LINK-USDT$21.60
0.0063699 Eth
$660,129.00
30,501.607 LINK
0.1916%
41
Bitbank
LINK-JPY$21.57
0.0063656 Eth
$646,239.00
29,960.180 LINK
0.1882%
42
WhiteBIT
LINK-TRY$21.69
0.0064005 Eth
$639,164.00
29,473.810 LINK
0.1851%
43
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.60
0.0063772 Eth
$569,882.00
26,446.490 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1661%
44
Bitbegin
LINK-USDT$21.54
0.0063580 Eth
$379,343.00
17,517.240 LINK
0.1100%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.55
0.0063593 Eth
$365,253.00
16,830.689 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1057%
46
Slex
LINK-ETH$21.53
0.0063571 Eth
$359,940.00
16,576.310 LINK
0.1041%
47
BitMart
LINK-BTC$21.55
0.0063616 Eth
$333,095.00
15,458.000 LINK
0.0971%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.60
0.0063745 Eth
$331,483.00
15,152.550 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0952%
49
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.67
0.0063975 Eth
$329,630.00
24,637.968 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1548%
50
BigONE
LINK-USDT$21.65
0.0063820 Eth
$306,589.00
14,162.080 LINK
0.0890%
51
Coinbase Exchange
LINK-BTC$21.54
0.0063571 Eth
$277,606.00
12,887.360 LINK
0.0810%
52
Gemini
LINK-USD$21.54
0.0063574 Eth
$277,339.00
12,878.261 LINK
0.0809%
53
Coinbase Exchange
LINK-ETH$21.55
0.0063605 Eth
$267,354.00
12,408.000 LINK
0.0779%
54
WhiteBIT
LINK-EUR$21.53
0.0063563 Eth
$250,409.00
11,628.090 LINK
0.0730%
55
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$21.60
0.0063770 Eth
$226,327.00
10,405.188 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0654%
56
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.60
0.0063775 Eth
$225,495.00
10,375.809 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0652%
57
Bitci TR
LINK-TRY$21.65
0.0063817 Eth
$221,518.00
10,163.301 LINK
0.0638%
58
LATOKEN
LINK-BTC$21.55
0.0063601 Eth
$208,543.00
9,679.041 LINK
0.0608%
59
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.63
0.0063845 Eth
$195,534.00
196,286.481 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.2330%
60
KuCoin
LINK-USDC$21.53
0.0063565 Eth
$180,608.00
8,387.700 LINK
0.0527%
61
OKX
LINK-USDC$21.54
0.0063596 Eth
$173,107.00
7,993.959 LINK
0.0502%
62
PointPay
LINK-BTC$21.55
0.0063604 Eth
$155,692.00
7,186.015 LINK
0.0451%
63
BitMart
LINK-ETH$21.54
0.0063589 Eth
$151,274.00
7,023.120 LINK
0.0441%
64
BitStorage
LINK-ETH$21.56
0.0063645 Eth
$149,243.00
6,921.570 LINK
0.0435%
65
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$21.69
0.0064041 Eth
$146,771.00
6,755.333 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0424%
66
Kraken
LINK-GBP$21.57
0.0063672 Eth
$94,936.00
4,401.844 LINK
0.0277%
67
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.54
0.0063587 Eth
$85,031.00
3,908.584 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0246%
68
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.58
0.0063698 Eth
$83,429.00
3,840.572 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0241%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.50
0.0063470 Eth
$79,516.00
3,662.215 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0230%
70
Bitso
LINK-USD$21.79
0.0064319 Eth
$77,417.00
3,553.229 LINK
0.0223%
71
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.59
0.0063747 Eth
$75,720.00
3,476.562 0X5947BB275C521040051D82396192181B413227A3
0.0218%
72
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.62
0.0063800 Eth
$67,473.00
3,128.907 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0197%
73
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.60
0.0063742 Eth
$67,406.00
3,093.199 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0194%
74
Hotcoin
LINK-BTC$21.55
0.0063604 Eth
$62,667.00
2,907.990 LINK
0.0183%
75
Binance US
LINK-USDT$21.54
0.0063591 Eth
$62,386.00
2,895.767 LINK
0.0182%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$21.63
0.0063847 Eth
$53,284.00
2,456.014 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0154%
77
Mercado Bitcoin
LINK-BRL$21.73
0.0064147 Eth
$52,926.00
2,435.633 LINK
0.0153%
78
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.59
0.0063730 Eth
$48,425.00
2,229.502 0X5947BB275C521040051D82396192181B413227A3
0.0140%
79
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.60
0.0063770 Eth
$46,224.00
46,604.039 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2927%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$21.60
0.0063770 Eth
$41,459.00
1,906.025 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0120%
81
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$21.67
0.0063975 Eth
$36,171.00
1,637.276 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0103%
82
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$21.59
0.0063738 Eth
$27,463.00
1,276.106 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0080%
83
Hotcoin
LINK-ETH$21.57
0.0063684 Eth
$21,094.00
977.780 LINK
0.0061%
84
HTX
LINK-BTC$21.53
0.0063565 Eth
$20,827.00
957.400 LINK
0.0060%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$21.63
0.0063844 Eth
$17,417.20
800.470 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0050%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$21.57
0.0063663 Eth
$15,394.54
709.145 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0045%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.63
0.0063818 Eth
$12,751.72
12,792.337 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0804%
88
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$21.51
0.0063497 Eth
$10,999.58
14.232 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
89
KuCoin
LINK-KCS$21.50
0.0063460 Eth
$8,772.44
408.085 LINK
0.0026%
90
CoinEx
LINK-USDC$21.69
0.0063958 Eth
$8,561.93
397.171 LINK
0.0025%
91
Bitexen
LINK-TRY$21.54
0.0063522 Eth
$8,025.08
372.525 LINK
0.0023%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$21.55
0.0063615 Eth
$7,985.32
368.329 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0023%
93
Ace
LINK-USDT$21.55
0.0063624 Eth
$3,373.42
155.810 LINK
0.0010%
94
Lydia Finance
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.66
0.0063928 Eth
$3,031.01
139.152 0X5947BB275C521040051D82396192181B413227A3
0.0009%
95
CoinEx
LINK-BTC$21.67
0.0063907 Eth
$1,964.78
90.561 LINK
0.0006%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFF970A61A04B1CA14834A43F5DE4533EBDDB5CC8$21.60
0.0063769 Eth
$1,678.26
77.489 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0005%
97
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$21.62
0.0063736 Eth
$1,249.85
57.891 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0004%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$21.65
0.0063820 Eth
$1,212.54
55.825 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
99
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$21.65
0.0063895 Eth
$426.13
19.619 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0001%
100
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$21.76
0.0064174 Eth
$312.48
14.418 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
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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