ETH Price: $3,489.10 (+2.36%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,045 ( -0.006%)

Market

Price

$25.03 @ 0.007174 ETH (+4.21%)

Onchain Market Cap

$25,030,000,000.00

Circulating Supply Market Cap

$15,776,004,149.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Bad Dogs Company: Deployer
Balance
0.014773427963343481 LINK

Value
$0.37 ( ~0.000106044603344515 Eth) [0.0000%]
0xff4b23e45a8a58c36f7fc28ac9ed830a56a4cf61
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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 22654.55% |ETH 0.0003846 1765.31%

Market

Volume (24H):$1,646,014,775.00
Market Capitalization:$15,776,004,149.00
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$25.05
0.0071653 Eth
$69,711,111.00
2,783,211.990 LINK
13.1517%
2
MEXC
LINK-USDT$25.05
0.0071667 Eth
$47,369,708.00
1,890,966.250 LINK
8.9355%
3
Bybit
LINK-USDT$25.02
0.0071605 Eth
$41,691,513.00
1,676,090.277 LINK
7.9201%
4
OKX
LINK-USDT$24.97
0.0071441 Eth
$30,333,703.00
1,221,460.074 LINK
5.7718%
5
DigiFinex
LINK-USDT$24.96
0.0071440 Eth
$25,314,489.00
1,014,208.440 LINK
4.7925%
6
XT.COM
LINK-USDT$25.04
0.0071638 Eth
$22,871,838.00
921,908.370 LINK
4.3564%
7
WEEX
LINK-USDT$24.96
0.0071388 Eth
$20,700,654.00
834,977.740 LINK
3.9456%
8
FameEX
LINK-USDT$24.96
0.0071430 Eth
$19,519,614.00
786,717.781 LINK
3.7175%
9
Azbit
LINK-USDT$24.99
0.0071530 Eth
$19,241,532.00
775,583.825 LINK
3.6649%
10
Coinstore
LINK-USDT$24.97
0.0071452 Eth
$16,584,108.00
669,117.970 LINK
3.1618%
11
Bitunix
LINK-USDT$25.08
0.0071717 Eth
$15,591,161.00
621,427.580 LINK
2.9365%
12
HTX
LINK-USDT$25.00
0.0071521 Eth
$12,943,407.00
523,276.979 LINK
2.4727%
13
Binance
LINK-FDUSD$24.99
0.0071530 Eth
$11,589,177.00
466,732.900 LINK
2.2055%
14
BTSE
LINK-USDT$25.08
0.0071696 Eth
$11,155,991.00
444,889.259 LINK
2.1023%
15
BYDFi
LINK-USDT$25.04
0.0071638 Eth
$11,103,221.00
443,398.480 LINK
2.0952%
16
Coinbase Exchange
LINK-GBP$25.05
0.0071656 Eth
$11,056,750.00
441,435.900 LINK
2.0859%
17
KuCoin
LINK-USDT$25.00
0.0071539 Eth
$10,011,328.00
400,429.820 LINK
1.8922%
18
LATOKEN
LINK-USDT$25.04
0.0071635 Eth
$9,417,273.00
376,075.357 LINK
1.7771%
19
Kraken
LINK-USD$25.02
0.0071591 Eth
$9,197,902.00
367,628.735 LINK
1.7372%
20
Biconomy.com
LINK-USDT$25.08
0.0071707 Eth
$8,932,640.00
360,026.890 LINK
1.7013%
21
QMall
LINK-USDT$25.07
0.0071672 Eth
$7,988,192.00
321,851.134 LINK
1.5209%
22
Dex-Trade
LINK-USDT$24.92
0.0071425 Eth
$6,471,323.00
259,647.510 LINK
1.2269%
23
Hotcoin
LINK-USDT$25.11
0.0071788 Eth
$5,722,313.00
227,896.650 LINK
1.0769%
24
Bitvavo
LINK-EUR$25.04
0.0071660 Eth
$4,869,121.00
194,478.087 LINK
0.9190%
25
Binance
LINK-USDC$25.03
0.0071613 Eth
$4,834,617.00
195,005.600 LINK
0.9215%
26
PointPay
LINK-USDT$25.06
0.0071650 Eth
$3,125,011.00
125,819.593 LINK
0.5945%
27
CoinEx
LINK-USDT$24.98
0.0071508 Eth
$3,084,753.00
123,961.937 LINK
0.5858%
28
Dcoin
LINK-USDT$24.93
0.0071438 Eth
$3,007,616.00
120,655.000 LINK
0.5701%
29
Coinbase Exchange
LINK-EUR$25.01
0.0071566 Eth
$2,976,139.00
118,994.030 LINK
0.5623%
30
EXMO
LINK-USDT$25.09
0.0071780 Eth
$2,824,147.00
112,580.015 LINK
0.5320%
31
WhiteBIT
LINK-BTC$25.09
0.0071736 Eth
$2,259,583.00
90,059.190 LINK
0.4256%
32
Coinbase Exchange
LINK-USDT$25.02
0.0071529 Eth
$2,247,537.00
89,832.171 LINK
0.4245%
33
Phemex
LINK-USDT$25.04
0.0071635 Eth
$2,053,497.00
82,006.320 LINK
0.3875%
34
BitMart
LINK-USDT$25.10
0.0071811 Eth
$2,018,412.00
80,410.560 LINK
0.3800%
35
WhiteBIT
LINK-TRY$25.16
0.0071965 Eth
$2,017,404.00
80,195.390 LINK
0.3790%
36
BitStorage
LINK-USDT$25.01
0.0071546 Eth
$1,624,815.00
64,964.150 LINK
0.3070%
37
tanX
LINK-USDC$25.09
0.0071770 Eth
$1,507,917.00
60,927.020 LINK
0.2879%
38
EarnBIT
LINK-USDT$24.95
0.0071462 Eth
$1,411,224.00
56,778.843 LINK
0.2683%
39
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.11
0.0071858 Eth
$1,404,515.00
55,897.466 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2641%
40
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$24.94
0.0071354 Eth
$1,234,836.00
49,111.253 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.2321%
41
Binance
LINK-TRY$25.10
0.0071829 Eth
$1,230,958.00
49,427.740 LINK
0.2336%
42
Bitbank
LINK-JPY$25.47
0.0072870 Eth
$1,121,529.00
44,030.567 LINK
0.2081%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.04
0.0071683 Eth
$1,034,126.00
41,610.173 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1966%
44
Bybit
LINK-USDC$25.07
0.0071751 Eth
$1,003,639.00
40,298.569 LINK
0.1904%
45
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.75
0.0070902 Eth
$957,238.00
66,861.510 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3159%
46
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.82
0.0071011 Eth
$929,415.00
37,019.422 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1749%
47
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.07
0.0071745 Eth
$851,354.00
33,921.327 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1603%
48
WhiteBIT
LINK-EUR$25.03
0.0071611 Eth
$843,896.00
33,710.350 LINK
0.1593%
49
BigONE
LINK-USDT$25.01
0.0071520 Eth
$831,422.00
33,237.910 LINK
0.1571%
50
Trubit
LINK-USDT$24.89
0.0071314 Eth
$808,847.00
32,676.350 LINK
0.1544%
51
KuCoin
LINK-USDC$25.11
0.0071855 Eth
$797,797.00
31,769.805 LINK
0.1501%
52
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$25.07
0.0071723 Eth
$775,194.00
31,239.881 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1476%
53
Binance
LINK-EUR$25.11
0.0071789 Eth
$713,437.00
28,610.910 LINK
0.1352%
54
Gemini
LINK-USD$24.98
0.0071484 Eth
$667,912.00
26,743.082 LINK
0.1264%
55
Coinbase Exchange
LINK-ETH$25.06
0.0071696 Eth
$643,993.00
25,696.550 LINK
0.1214%
56
GMO Japan
LINK-JPY$25.31
0.0072428 Eth
$623,655.00
24,645.400 LINK
0.1165%
57
HashKey Exchange
LINK-USD$25.07
0.0071727 Eth
$538,992.00
21,762.397 LINK
0.1028%
58
Nonkyc.io
LINK-USDT$24.97
0.0071388 Eth
$503,678.00
20,518.998 LINK
0.0970%
59
WEEX
LINK-USDC$24.97
0.0071427 Eth
$501,188.00
20,069.361 LINK
0.0948%
60
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.10
0.0071841 Eth
$494,498.00
489,181.727 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3116%
61
BitMart
LINK-BTC$25.09
0.0071767 Eth
$460,027.00
18,336.460 LINK
0.0866%
62
itBit
LINK-USD$24.89
0.0071297 Eth
$446,388.00
17,934.451 LINK
0.0847%
63
Slex
LINK-ETH$25.05
0.0071675 Eth
$441,054.00
17,663.550 LINK
0.0835%
64
Bitkub
LINK-THB$25.03
0.0071605 Eth
$436,084.00
17,422.949 LINK
0.0823%
65
Coinbase Exchange
LINK-BTC$25.07
0.0071679 Eth
$408,892.00
16,309.230 LINK
0.0771%
66
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.09
0.0071735 Eth
$393,839.00
15,874.043 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0750%
67
LATOKEN
LINK-BTC$25.07
0.0071725 Eth
$363,435.00
14,494.904 LINK
0.0685%
68
Binance US
LINK-USDT$25.00
0.0071559 Eth
$349,253.00
13,969.400 LINK
0.0660%
69
BitDelta
LINK-USDT$25.07
0.0071721 Eth
$340,862.00
13,773.000 LINK
0.0651%
70
OKX
LINK-USDC$24.97
0.0071457 Eth
$314,194.00
12,635.379 LINK
0.0597%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.10
0.0071850 Eth
$291,635.00
11,739.779 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0555%
72
PointPay
LINK-BTC$25.05
0.0071621 Eth
$267,061.00
10,659.627 LINK
0.0504%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.04
0.0071672 Eth
$256,384.00
10,208.074 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0482%
74
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$25.05
0.0071689 Eth
$249,462.00
9,943.467 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0470%
75
Bitci TR
LINK-TRY$25.04
0.0071607 Eth
$243,070.00
9,811.790 LINK
0.0464%
76
BitMart
LINK-ETH$25.08
0.0071762 Eth
$242,255.00
9,657.540 LINK
0.0456%
77
BitStorage
LINK-ETH$25.02
0.0071603 Eth
$226,110.00
9,038.260 LINK
0.0427%
78
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.92
0.0071306 Eth
$215,634.00
8,725.927 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0412%
79
KuCoin
LINK-BTC$25.11
0.0071838 Eth
$212,115.00
8,448.897 LINK
0.0399%
80
BTCMarkets
LINK-AUD$25.15
0.0071978 Eth
$199,932.00
7,948.029 LINK
0.0376%
81
Hotcoin
LINK-BTC$25.06
0.0071696 Eth
$192,816.00
7,693.720 LINK
0.0364%
82
Kraken
LINK-ETH$25.12
0.0071874 Eth
$182,655.00
7,271.793 LINK
0.0344%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$25.08
0.0071731 Eth
$179,783.00
178,508.549 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.8435%
84
Kraken
LINK-GBP$25.13
0.0071915 Eth
$174,854.00
6,957.250 LINK
0.0329%
85
Bitso
LINK-USD$24.94
0.0071326 Eth
$154,366.00
6,188.735 LINK
0.0292%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$25.11
0.0071827 Eth
$129,271.00
5,203.754 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0246%
87
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$25.03
0.0071595 Eth
$127,239.00
5,079.052 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0240%
88
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$25.03
0.0071598 Eth
$106,083.00
4,200.156 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0198%
89
Bitexen
LINK-TRY$24.78
0.0071024 Eth
$75,706.00
3,054.674 LINK
0.0144%
90
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.92
0.0071306 Eth
$75,057.00
5,213.427 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0246%
91
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$24.98
0.0071466 Eth
$71,343.00
93.785 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0004%
92
Hotcoin
LINK-ETH$25.09
0.0071768 Eth
$67,892.00
2,706.060 LINK
0.0128%
93
Mercado Bitcoin
LINK-BRL$24.56
0.0070249 Eth
$61,922.00
2,521.714 LINK
0.0119%
94
Coins.ph
LINK-PHP$24.86
0.0071223 Eth
$52,752.00
2,119.277 LINK
0.0100%
95
Independent Reserve
LINK-AUD$24.98
0.0071545 Eth
$49,477.00
1,980.583 LINK
0.0094%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$24.65
0.0070560 Eth
$49,438.00
1,958.318 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0093%
97
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$24.71
0.0070688 Eth
$41,685.00
1,668.036 0X5947BB275C521040051D82396192181B413227A3
0.0079%
98
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$25.04
0.0071648 Eth
$34,176.00
1,374.247 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0065%
99
Ace
LINK-USDT$24.99
0.0071512 Eth
$7,277.58
293.470 LINK
0.0014%
100
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$24.93
0.0071315 Eth
$572.62
23.136 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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