ETH Price: $2,451.34 (+1.92%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,435 ( -0.001%)

Market

Price

$11.30 @ 0.004610 ETH (-0.38%)

Onchain Market Cap

$11,300,000,000.00

Circulating Supply Market Cap

$7,088,073,636.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
81.39256435285123177 LINK

Value
$919.74 ( ~0.375199469322562 Eth) [0.0000%]
0xa7e5158d5ab436df7030a68651cfbe46220c67b3
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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 10172.73% |ETH 0.0003846 1098.65%

Market

Volume (24H):$269,690,738.00
Market Capitalization:$7,088,073,636.00
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$11.35
0.0046275 Eth
$31,572,861.00
2,782,341.220 LINK
24.2187%
2
Binance
LINK-USDT$11.33
0.0046292 Eth
$14,383,750.00
1,277,052.560 LINK
11.1160%
3
Coinbase Exchange
LINK-USD$11.34
0.0046244 Eth
$9,316,760.00
821,656.260 LINK
7.1520%
4
Bitget
LINK-USDT$11.35
0.0046304 Eth
$9,155,041.00
812,977.312 LINK
7.0765%
5
HTX
LINK-USDT$11.35
0.0046280 Eth
$6,547,290.00
581,379.899 LINK
5.0606%
6
Websea
LINK-USDT$11.36
0.0046308 Eth
$6,272,211.00
0.000 LINK
0.0000%
7
Azbit
LINK-USDT$11.31
0.0046180 Eth
$5,218,340.00
463,256.520 LINK
4.0324%
8
Biconomy.com
LINK-USDT$11.35
0.0046342 Eth
$3,958,166.00
351,622.480 LINK
3.0607%
9
BVOX
LINK-USDT$11.35
0.0046342 Eth
$3,322,300.00
295,002.450 LINK
2.5678%
10
P2B
LINK-USDT$11.34
0.0046286 Eth
$3,102,880.00
273,659.700 LINK
2.3820%
11
WEEX
LINK-USDT$11.28
0.0046125 Eth
$3,020,514.00
268,094.180 LINK
2.3336%
12
Slex
LINK-USDT$11.31
0.0046151 Eth
$2,502,097.00
222,128.940 LINK
1.9335%
13
Poloniex
LINK-USDT$11.35
0.0046327 Eth
$2,378,907.00
211,260.450 LINK
1.8389%
14
OKX
LINK-USDT$11.36
0.0046309 Eth
$2,313,734.00
205,653.781 LINK
1.7901%
15
Trubit
LINK-USDT$11.35
0.0046342 Eth
$2,010,397.00
178,352.440 LINK
1.5525%
16
DigiFinex
LINK-USDT$11.36
0.0046314 Eth
$1,880,592.00
165,569.490 LINK
1.4412%
17
KuCoin
LINK-USDT$11.34
0.0046266 Eth
$1,721,080.00
151,724.351 LINK
1.3207%
18
AscendEX (BitMax)
LINK-USDT$11.36
0.0046341 Eth
$1,710,373.00
150,520.900 LINK
1.3102%
19
Deepcoin
LINK-USDT$11.36
0.0046363 Eth
$1,511,289.00
133,415.100 LINK
1.1613%
20
Toobit
LINK-USDT$11.37
0.0046403 Eth
$1,238,745.00
109,998.040 LINK
0.9575%
21
Binance
LINK-BTC$11.34
0.0046251 Eth
$1,178,096.00
103,396.440 LINK
0.9000%
22
Oceanex
LINK-USDT$11.34
0.0046337 Eth
$1,127,322.00
99,405.830 LINK
0.8653%
23
CoinW
LINK-USDT$11.36
0.0046360 Eth
$1,090,249.00
95,980.940 LINK
0.8355%
24
Azbit
LINK-ETH$11.30
0.0046160 Eth
$959,737.00
84,161.179 LINK
0.7326%
25
Crypto.com Exchange
LINK-USDT$11.35
0.0046300 Eth
$934,753.00
82,337.240 LINK
0.7167%
26
Gate.io
LINK-USDT$11.35
0.0046292 Eth
$861,642.00
76,436.510 LINK
0.6653%
27
FMCPAY
LINK-USDT$11.33
0.0046206 Eth
$828,933.00
73,632.418 LINK
0.6409%
28
BTSE
LINK-USDT$11.34
0.0046242 Eth
$781,759.00
68,946.165 LINK
0.6001%
29
Binance
LINK-FDUSD$11.28
0.0046113 Eth
$731,533.00
64,966.120 LINK
0.5655%
30
BYDFi
LINK-USDT$11.28
0.0046110 Eth
$682,769.00
60,527.570 LINK
0.5269%
31
Hotcoin
LINK-USDT$11.34
0.0046235 Eth
$628,515.00
55,436.420 LINK
0.4825%
32
FMFW.io
LINK-USDT$11.33
0.0046221 Eth
$615,181.00
54,284.640 LINK
0.4725%
33
HitBTC
LINK-USDT$11.35
0.0046285 Eth
$611,389.00
54,289.390 LINK
0.4726%
34
Bitunix
LINK-USDT$11.30
0.0046179 Eth
$607,918.00
53,811.780 LINK
0.4684%
35
FameEX
LINK-USDT$11.35
0.0046335 Eth
$574,998.00
51,054.719 LINK
0.4444%
36
Kraken
LINK-USD$11.34
0.0046250 Eth
$565,580.00
49,868.569 LINK
0.4341%
37
Niza Global
LINK-USD$11.34
0.0046296 Eth
$561,987.00
49,902.218 LINK
0.4344%
38
tanX
LINK-USDC$11.35
0.0046237 Eth
$557,433.00
49,491.960 LINK
0.4308%
39
Bitvavo
LINK-EUR$11.36
0.0046330 Eth
$556,577.00
48,990.655 LINK
0.4264%
40
CoinEx
LINK-USDT$11.35
0.0046311 Eth
$522,165.00
46,373.313 LINK
0.4037%
41
FMCPAY
LINK-BTC$11.34
0.0046250 Eth
$477,095.00
41,839.500 LINK
0.3642%
42
FMCPAY
LINK-ETH$11.35
0.0046262 Eth
$468,721.00
41,050.880 LINK
0.3573%
43
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.26
0.0045985 Eth
$447,320.00
39,472.785 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3436%
44
MEXC
LINK-USDT$11.36
0.0046324 Eth
$408,578.00
35,970.340 LINK
0.3131%
45
WhiteBIT
LINK-BTC$11.34
0.0046305 Eth
$388,258.00
34,238.110 LINK
0.2980%
46
Crypto.com Exchange
LINK-USD$11.35
0.0046297 Eth
$347,332.00
30,596.570 LINK
0.2663%
47
LATOKEN
LINK-BTC$11.33
0.0046253 Eth
$326,990.00
28,859.516 LINK
0.2512%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.31
0.0046156 Eth
$296,051.00
26,006.698 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2264%
49
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.30
0.0046125 Eth
$276,273.00
24,307.137 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2116%
50
EXMO
LINK-USDT$11.36
0.0046356 Eth
$258,893.00
22,784.058 LINK
0.1983%
51
Bithumb
LINK-KRW$11.35
0.0046294 Eth
$246,100.00
21,678.498 LINK
0.1887%
52
Pionex
LINK-USDT$11.35
0.0046280 Eth
$243,513.00
21,611.150 LINK
0.1881%
53
PointPay
LINK-USDT$11.31
0.0046159 Eth
$236,413.00
20,990.556 LINK
0.1827%
54
LATOKEN
LINK-USDT$11.34
0.0046285 Eth
$226,237.00
19,953.537 LINK
0.1737%
55
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.32
0.0046146 Eth
$207,419.00
18,257.190 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1589%
56
BigONE
LINK-USDT$11.34
0.0046267 Eth
$186,998.00
16,488.380 LINK
0.1435%
57
BitMart
LINK-BTC$11.35
0.0046292 Eth
$179,386.00
15,801.020 LINK
0.1375%
58
WhiteBIT
LINK-EUR$11.30
0.0046108 Eth
$178,932.00
15,827.850 LINK
0.1378%
59
Bitbank
LINK-JPY$11.34
0.0046265 Eth
$175,460.00
15,478.304 LINK
0.1347%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.34
0.0046274 Eth
$128,124.00
11,231.851 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0978%
61
Niza Global
LINK-EUR$11.34
0.0046247 Eth
$122,906.00
10,892.577 LINK
0.0948%
62
Hotcoin
LINK-ETH$11.35
0.0046292 Eth
$121,975.00
10,745.210 LINK
0.0935%
63
Bit2Me
LINK-EUR$11.29
0.0046083 Eth
$120,863.00
10,673.104 LINK
0.0929%
64
Bitci TR
LINK-TRY$11.48
0.0046800 Eth
$116,795.00
10,266.770 LINK
0.0894%
65
Coinbase Exchange
LINK-ETH$11.29
0.0046073 Eth
$114,213.00
10,118.410 LINK
0.0881%
66
Hotcoin
LINK-BTC$11.33
0.0046204 Eth
$105,664.00
9,325.890 LINK
0.0812%
67
Nominex
LINK-USDT$11.35
0.0046314 Eth
$94,447.00
8,319.452 LINK
0.0724%
68
Slex
LINK-BTC$11.32
0.0046202 Eth
$72,572.00
6,373.500 LINK
0.0555%
69
Slex
LINK-ETH$11.31
0.0046164 Eth
$71,298.00
6,243.060 LINK
0.0543%
70
GMO Japan
LINK-JPY$11.26
0.0046017 Eth
$57,745.00
5,127.200 LINK
0.0446%
71
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.34
0.0046280 Eth
$55,092.00
4,853.714 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0422%
72
Bitget
LINK-EUR$11.36
0.0046346 Eth
$51,468.00
4,564.340 LINK
0.0397%
73
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.24
0.0045887 Eth
$34,960.00
34,992.886 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3046%
74
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.30
0.0046125 Eth
$30,632.00
30,551.528 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2659%
75
Bitkub
LINK-THB$11.42
0.0046618 Eth
$27,379.00
2,396.991 LINK
0.0209%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.28
0.0046056 Eth
$27,284.00
2,393.822 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0208%
77
EXMO
LINK-BTC$11.37
0.0046373 Eth
$25,611.00
2,253.080 LINK
0.0196%
78
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.30
0.0046135 Eth
$23,596.00
23,390.078 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2036%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.32
0.0046229 Eth
$21,190.00
1,855.955 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0162%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.32
0.0046197 Eth
$19,171.84
1,703.454 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0148%
81
Bitso
LINK-USD$11.32
0.0046152 Eth
$18,008.13
1,591.457 LINK
0.0139%
82
TokoCrypto
LINK-USDT$11.34
0.0046235 Eth
$16,325.46
1,439.941 LINK
0.0125%
83
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.25
0.0045870 Eth
$15,206.49
1,342.539 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0117%
84
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.32
0.0046214 Eth
$12,729.26
1,115.894 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0097%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.32
0.0046146 Eth
$12,081.95
1,077.906 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0094%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.32
0.0046214 Eth
$7,561.66
670.757 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0058%
87
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.30
0.0046139 Eth
$7,046.31
11.475 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
88
CEX.IO
LINK-USDT$11.34
0.0046345 Eth
$6,796.75
600.231 LINK
0.0052%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.29
0.0046096 Eth
$4,136.95
363.579 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0032%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.30
0.0046167 Eth
$3,878.35
327.348 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0028%
91
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.35
0.0046304 Eth
$3,442.86
302.458 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0026%
92
CoinEx
LINK-BTC$11.34
0.0046273 Eth
$1,971.11
172.752 LINK
0.0015%
93
CoinEx
LINK-USDC$11.32
0.0046174 Eth
$1,958.51
173.802 LINK
0.0015%
94
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.29
0.0046095 Eth
$1,886.72
167.481 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0015%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.30
0.0046094 Eth
$1,723.21
150.554 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0013%
96
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.26
0.0045908 Eth
$985.48
86.767 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0008%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$11.30
0.0046094 Eth
$691.72
61.138 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.24
0.0045902 Eth
$177.04
15.533 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
99
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.24
0.0045878 Eth
$162.12
293.204 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0026%
100
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.23
0.0045859 Eth
$131.01
11.569 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
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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