ETH Price: $3,988.35 (-0.18%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,399 ( -0.023%)

Market

Price

$25.93 @ 0.006501 ETH (+5.47%)

Onchain Market Cap

$25,930,000,000.00

Circulating Supply Market Cap

$16,236,857,596.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.114072443255062912 LINK

Value
$2.96 ( ~0.000742162022363521 Eth) [0.0000%]
0x979fdeeeb9e5edae6ddeedc807e49fe6e9bcedec
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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 23472.73% |ETH 0.0003846 1590.33%

Market

Volume (24H):$2,181,660,866.00
Market Capitalization:$16,236,857,596.00
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
Coinbase Exchange
LINK-USD$25.93
0.0064998 Eth
$85,954,774.00
3,315,516.850 LINK
9.8086%
2
Bitget
LINK-USDT$25.93
0.0065017 Eth
$79,721,997.00
3,090,722.981 LINK
9.1436%
3
WhiteBIT
LINK-USDT$25.93
0.0065020 Eth
$68,544,522.00
2,643,050.910 LINK
7.8192%
4
Bybit
LINK-USDT$25.92
0.0064999 Eth
$68,161,762.00
2,644,561.999 LINK
7.8237%
5
Gate.io
LINK-USDT$25.92
0.0064996 Eth
$45,987,596.00
1,767,159.686 LINK
5.2280%
6
OKX
LINK-USDT$25.94
0.0065033 Eth
$37,354,745.00
1,442,604.575 LINK
4.2678%
7
DigiFinex
LINK-USDT$25.93
0.0065026 Eth
$29,524,463.00
1,138,421.660 LINK
3.3679%
8
Bitunix
LINK-USDT$25.94
0.0065024 Eth
$28,680,693.00
1,106,067.070 LINK
3.2722%
9
Ourbit
LINK-USDT$25.98
0.0065135 Eth
$26,998,125.00
1,044,355.680 LINK
3.0896%
10
Binance
LINK-FDUSD$25.92
0.0064980 Eth
$24,982,672.00
972,998.050 LINK
2.8785%
11
Slex
LINK-USDT$25.93
0.0065016 Eth
$24,962,776.00
982,458.710 LINK
2.9065%
12
BTSE
LINK-USDT$25.96
0.0065097 Eth
$23,651,557.00
911,084.672 LINK
2.6953%
13
XT.COM
LINK-USDT$25.86
0.0064873 Eth
$22,507,068.00
868,535.570 LINK
2.5695%
14
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.96
0.0065095 Eth
$21,432,290.00
823,169.475 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.4353%
15
Coinstore
LINK-USDT$25.97
0.0065105 Eth
$18,977,301.00
732,820.080 LINK
2.1680%
16
Toobit
LINK-USDT$25.95
0.0065076 Eth
$17,864,777.00
689,419.710 LINK
2.0396%
17
CoinW
LINK-USDT$25.85
0.0064863 Eth
$17,658,655.00
683,193.510 LINK
2.0212%
18
HTX
LINK-USDT$25.93
0.0065013 Eth
$16,730,700.00
655,482.763 LINK
1.9392%
19
BYDFi
LINK-USDT$25.79
0.0064689 Eth
$12,649,001.00
490,407.590 LINK
1.4508%
20
Azbit
LINK-USDT$25.81
0.0064740 Eth
$12,346,502.00
486,296.610 LINK
1.4387%
21
Biconomy.com
LINK-USDT$25.85
0.0064851 Eth
$11,602,008.00
451,373.240 LINK
1.3353%
22
Kraken
LINK-USD$25.96
0.0065085 Eth
$10,801,963.00
416,139.400 LINK
1.2311%
23
KuCoin
LINK-USDT$25.93
0.0065015 Eth
$10,249,653.00
395,288.421 LINK
1.1694%
24
LATOKEN
LINK-USDT$25.98
0.0065151 Eth
$10,190,824.00
392,241.555 LINK
1.1604%
25
Binance
LINK-BTC$25.94
0.0065041 Eth
$10,067,843.00
385,819.070 LINK
1.1414%
26
Bitvavo
LINK-EUR$25.89
0.0064915 Eth
$8,395,677.00
324,318.246 LINK
0.9595%
27
Dex-Trade
LINK-USDT$25.92
0.0064990 Eth
$7,412,594.00
285,982.440 LINK
0.8460%
28
Binance
LINK-USDC$25.93
0.0065011 Eth
$7,245,463.00
277,071.200 LINK
0.8197%
29
Hotcoin
LINK-USDT$25.94
0.0065040 Eth
$6,216,128.00
239,615.800 LINK
0.7089%
30
CoinEx
LINK-USDT$25.75
0.0064607 Eth
$5,668,851.00
217,919.970 LINK
0.6447%
31
LBank
LINK-USDT$25.93
0.0065021 Eth
$5,589,623.00
215,568.660 LINK
0.6377%
32
ProBit Global
LINK-USDT$25.87
0.0064918 Eth
$3,246,464.00
125,513.559 LINK
0.3713%
33
Kraken
LINK-EUR$25.89
0.0064904 Eth
$3,143,390.00
121,435.406 LINK
0.3593%
34
EXMO
LINK-USDT$25.95
0.0065064 Eth
$3,128,281.00
120,543.030 LINK
0.3566%
35
WhiteBIT
LINK-BTC$25.94
0.0065051 Eth
$2,923,118.00
112,668.290 LINK
0.3333%
36
Binance
LINK-TRY$26.03
0.0065245 Eth
$2,885,669.00
108,816.490 LINK
0.3219%
37
Binance
LINK-ETH$25.83
0.0064808 Eth
$2,751,067.00
106,667.630 LINK
0.3156%
38
WhiteBIT
LINK-TRY$26.06
0.0065347 Eth
$2,693,348.00
103,334.060 LINK
0.3057%
39
Dcoin
LINK-USDT$25.90
0.0064950 Eth
$2,610,218.00
100,783.000 LINK
0.2982%
40
PointPay
LINK-USDT$25.93
0.0065015 Eth
$2,514,187.00
96,981.813 LINK
0.2869%
41
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$26.03
0.0065253 Eth
$2,437,552.00
130,803.143 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3870%
42
Phemex
LINK-USDT$25.85
0.0064891 Eth
$2,323,515.00
89,869.000 LINK
0.2659%
43
Azbit
LINK-ETH$25.93
0.0065002 Eth
$2,198,421.00
86,656.131 LINK
0.2564%
44
Bitbank
LINK-JPY$25.98
0.0065152 Eth
$2,103,997.00
80,981.062 LINK
0.2396%
45
Trubit
LINK-USDT$25.95
0.0065065 Eth
$2,096,282.00
81,881.610 LINK
0.2422%
46
Bitstamp
LINK-USD$25.93
0.0065016 Eth
$2,017,970.00
77,823.758 LINK
0.2302%
47
Coinbase Exchange
LINK-EUR$25.90
0.0064942 Eth
$2,003,065.00
77,345.200 LINK
0.2288%
48
LATOKEN
LINK-BTC$25.71
0.0064509 Eth
$1,989,123.00
77,372.321 LINK
0.2289%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.91
0.0064963 Eth
$1,952,984.00
75,050.032 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2220%
50
Coinbase Exchange
LINK-BTC$25.95
0.0065051 Eth
$1,820,220.00
70,153.450 LINK
0.2075%
51
BitStorage
LINK-USDT$25.95
0.0065071 Eth
$1,816,620.00
69,991.260 LINK
0.2071%
52
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.88
0.0064899 Eth
$1,800,856.00
69,647.576 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2060%
53
EarnBIT
LINK-USDT$25.85
0.0064841 Eth
$1,789,984.00
69,159.219 LINK
0.2046%
54
Tokpie
LINK-USDT$25.97
0.0065105 Eth
$1,646,101.00
63,388.390 LINK
0.1875%
55
Kraken
LINK-USDT$25.94
0.0065052 Eth
$1,599,635.00
61,656.587 LINK
0.1824%
56
Bitstamp
LINK-EUR$25.89
0.0064908 Eth
$1,597,263.00
61,700.984 LINK
0.1825%
57
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$25.94
0.0065041 Eth
$1,580,000.00
61,338.048 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1815%
58
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.96
0.0065086 Eth
$1,519,794.00
58,592.976 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1733%
59
Gemini
LINK-USD$25.90
0.0064941 Eth
$1,310,084.00
50,582.401 LINK
0.1496%
60
itBit
LINK-USD$25.98
0.0065149 Eth
$1,269,791.00
48,875.721 LINK
0.1446%
61
Binance
LINK-EUR$25.92
0.0064995 Eth
$1,217,412.00
46,747.800 LINK
0.1383%
62
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$25.70
0.0064448 Eth
$951,595.00
36,745.741 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1087%
63
Coinbase Exchange
LINK-USDT$25.98
0.0065139 Eth
$871,612.00
33,546.739 LINK
0.0992%
64
ProBit Global
LINK-BTC$25.85
0.0064863 Eth
$866,352.00
33,518.352 LINK
0.0992%
65
XT.COM
LINK-ETH$25.85
0.0064825 Eth
$774,366.00
30,014.770 LINK
0.0888%
66
Bitkub
LINK-THB$25.84
0.0064826 Eth
$759,805.00
29,400.456 LINK
0.0870%
67
GMO Japan
LINK-JPY$25.93
0.0065007 Eth
$742,961.00
28,653.400 LINK
0.0848%
68
WhiteBIT
LINK-EUR$25.83
0.0064827 Eth
$707,308.00
27,380.860 LINK
0.0810%
69
Bybit
LINK-USDC$25.96
0.0065086 Eth
$642,710.00
24,816.138 LINK
0.0734%
70
CEX.IO
LINK-USDT$25.75
0.0064584 Eth
$632,855.00
23,798.273 LINK
0.0704%
71
BitStorage
LINK-ETH$25.92
0.0064975 Eth
$618,036.00
23,847.070 LINK
0.0705%
72
Binance
LINK-BRL$26.12
0.0065574 Eth
$601,310.00
23,600.250 LINK
0.0698%
73
BitMart
LINK-BTC$25.96
0.0065071 Eth
$585,074.00
22,541.840 LINK
0.0667%
74
BigONE
LINK-USDT$25.71
0.0064484 Eth
$578,419.00
22,499.380 LINK
0.0666%
75
Slex
LINK-BTC$25.93
0.0065016 Eth
$575,547.00
22,060.900 LINK
0.0653%
76
Binance US
LINK-USDT$25.96
0.0065089 Eth
$536,175.00
20,652.291 LINK
0.0611%
77
OKX
LINK-USDC$25.95
0.0065063 Eth
$521,000.00
20,331.064 LINK
0.0601%
78
HashKey Exchange
LINK-USD$25.91
0.0064955 Eth
$511,529.00
19,463.642 LINK
0.0576%
79
WEEX
LINK-USDC$25.74
0.0064567 Eth
$500,144.00
19,427.545 LINK
0.0575%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$25.88
0.0064886 Eth
$490,406.00
19,217.422 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0569%
81
Slex
LINK-ETH$25.91
0.0064952 Eth
$438,602.00
17,310.020 LINK
0.0512%
82
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.95
0.0065081 Eth
$400,628.00
15,442.879 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0457%
83
PointPay
LINK-BTC$25.98
0.0065139 Eth
$387,135.00
14,838.307 LINK
0.0439%
84
BitMart
LINK-ETH$25.93
0.0065018 Eth
$334,969.00
12,916.260 LINK
0.0382%
85
BitDelta
LINK-USDT$25.92
0.0064993 Eth
$325,090.00
12,641.000 LINK
0.0374%
86
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.97
0.0065127 Eth
$298,116.00
295,770.681 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.8750%
87
Kraken
LINK-GBP$25.92
0.0064994 Eth
$294,307.00
11,353.856 LINK
0.0336%
88
Coinbase Exchange
LINK-GBP$25.94
0.0065052 Eth
$286,718.00
11,052.410 LINK
0.0327%
89
KuCoin
LINK-BTC$25.87
0.0064862 Eth
$280,553.00
10,845.239 LINK
0.0321%
90
Uniswap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$25.84
0.0064783 Eth
$279,467.00
68,482.312 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.2026%
91
Bitso
LINK-USD$25.96
0.0065079 Eth
$256,250.00
9,872.812 LINK
0.0292%
92
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$25.87
0.0064871 Eth
$253,027.00
9,684.904 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0287%
93
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.80
0.0064693 Eth
$249,199.00
9,657.856 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0286%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.98
0.0065151 Eth
$236,041.00
9,090.293 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0269%
95
Sushiswap
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.81
0.0064726 Eth
$197,602.00
7,622.771 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0226%
96
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$25.71
0.0064468 Eth
$187,879.00
188,341.378 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5572%
97
Coinbase Exchange
LINK-ETH$25.94
0.0065052 Eth
$166,696.00
6,426.030 LINK
0.0190%
98
KuCoin
LINK-USDC$25.95
0.0065059 Eth
$142,562.00
5,494.351 LINK
0.0163%
99
Mercado Bitcoin
LINK-BRL$26.30
0.0065954 Eth
$137,046.00
5,209.940 LINK
0.0154%
100
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.88
0.0064911 Eth
$65,652.00
2,513.508 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0074%

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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