ETH Price: $3,617.29 (+4.82%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,251 ( 0.032%)

Market

Price

$23.42 @ 0.006474 ETH (+6.86%)

Onchain Market Cap

$23,420,000,000.00

Circulating Supply Market Cap

$14,801,773,262.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
447.15095933 LINK

Value
$10,472.28 ( ~2.8951 Eth) [0.0000%]
0x9F71FD0bB5c7Def872F05E873cD0F031704b9672
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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 21190.91% |ETH 0.0003846 1583.31%

Market

Volume (24H):$1,217,985,321.00
Market Capitalization:$14,801,773,262.00
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
Binance
LINK-USDT$23.52
0.0064979 Eth
$142,165,588.00
6,271,950.240 LINK
21.2460%
2
Coinbase Exchange
LINK-USD$23.49
0.0064934 Eth
$47,153,528.00
2,007,216.410 LINK
6.7994%
3
Upbit
LINK-KRW$23.60
0.0065198 Eth
$34,021,613.00
1,441,516.000 LINK
4.8831%
4
Bitget
LINK-USDT$23.53
0.0065014 Eth
$31,976,302.00
1,404,124.828 LINK
4.7564%
5
P2B
LINK-USDT$23.41
0.0064779 Eth
$30,876,817.00
1,319,199.470 LINK
4.4687%
6
MEXC
LINK-USDT$23.37
0.0064774 Eth
$27,837,526.00
1,191,129.990 LINK
4.0349%
7
Bybit
LINK-USDT$23.52
0.0064976 Eth
$26,718,462.00
1,174,209.731 LINK
3.9776%
8
CoinW
LINK-USDT$23.46
0.0064899 Eth
$26,401,375.00
1,125,580.480 LINK
3.8129%
9
OKX
LINK-USDT$23.53
0.0065014 Eth
$21,931,758.00
963,016.896 LINK
3.2622%
10
Slex
LINK-USDT$23.51
0.0064966 Eth
$21,919,815.00
969,559.770 LINK
3.2843%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.44
0.0064796 Eth
$21,043,189.00
895,875.337 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.0347%
12
DigiFinex
LINK-USDT$23.54
0.0065025 Eth
$18,910,466.00
803,373.270 LINK
2.7214%
13
FameEX
LINK-USDT$23.53
0.0065001 Eth
$14,185,157.00
625,835.100 LINK
2.1200%
14
XT.COM
LINK-USDT$23.49
0.0064920 Eth
$14,174,089.00
625,460.600 LINK
2.1187%
15
Azbit
LINK-USDT$23.45
0.0064809 Eth
$14,063,602.00
620,613.054 LINK
2.1023%
16
Coinstore
LINK-USDT$23.52
0.0065007 Eth
$12,602,681.00
556,119.630 LINK
1.8838%
17
Bitunix
LINK-USDT$23.51
0.0064952 Eth
$11,335,616.00
482,166.220 LINK
1.6333%
18
BYDFi
LINK-USDT$23.47
0.0064952 Eth
$9,486,292.00
404,105.630 LINK
1.3689%
19
Binance
LINK-FDUSD$23.47
0.0064974 Eth
$9,426,833.00
412,803.330 LINK
1.3984%
20
HTX
LINK-USDT$23.52
0.0064972 Eth
$9,396,647.00
415,462.523 LINK
1.4074%
21
Biconomy.com
LINK-USDT$23.51
0.0064993 Eth
$8,081,745.00
355,975.370 LINK
1.2059%
22
Kraken
LINK-USD$23.49
0.0064891 Eth
$7,593,957.00
323,284.797 LINK
1.0951%
23
Bithumb
LINK-KRW$23.64
0.0065319 Eth
$7,544,781.00
319,123.784 LINK
1.0810%
24
LBank
LINK-USDT$23.45
0.0064897 Eth
$7,269,630.00
309,942.270 LINK
1.0499%
25
LATOKEN
LINK-USDT$23.46
0.0064930 Eth
$6,876,817.00
293,123.028 LINK
0.9929%
26
Binance
LINK-USDC$23.38
0.0064732 Eth
$6,647,890.00
291,378.930 LINK
0.9870%
27
QMall
LINK-USDT$23.38
0.0064804 Eth
$5,735,040.00
253,049.990 LINK
0.8572%
28
Dex-Trade
LINK-USDT$23.55
0.0065039 Eth
$4,749,105.00
201,702.070 LINK
0.6833%
29
Hotcoin
LINK-USDT$23.46
0.0064924 Eth
$3,708,690.00
158,053.460 LINK
0.5354%
30
FMCPAY
LINK-USDT$23.48
0.0064906 Eth
$3,525,426.00
154,901.308 LINK
0.5247%
31
KuCoin
LINK-USDT$23.52
0.0064963 Eth
$3,525,246.00
149,907.950 LINK
0.5078%
32
BTSE
LINK-USDT$23.48
0.0064897 Eth
$3,270,720.00
139,293.243 LINK
0.4718%
33
CoinEx
LINK-USDT$23.50
0.0064919 Eth
$3,131,124.00
135,683.040 LINK
0.4596%
34
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.41
0.0064683 Eth
$2,655,746.00
113,916.635 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3859%
35
PointPay
LINK-USDT$23.50
0.0064938 Eth
$2,250,237.00
99,199.254 LINK
0.3360%
36
Dcoin
LINK-USDT$23.49
0.0064916 Eth
$2,167,984.00
92,302.000 LINK
0.3127%
37
Bitvavo
LINK-EUR$23.43
0.0064836 Eth
$2,163,602.00
92,331.047 LINK
0.3128%
38
EXMO
LINK-USDT$23.49
0.0064907 Eth
$2,029,206.00
86,385.097 LINK
0.2926%
39
ProBit Global
LINK-USDT$23.50
0.0065003 Eth
$1,703,817.00
72,499.536 LINK
0.2456%
40
Phemex
LINK-USDT$23.40
0.0064859 Eth
$1,568,141.00
67,011.470 LINK
0.2270%
41
FMCPAY
LINK-ETH$23.44
0.0064842 Eth
$1,540,356.00
65,844.000 LINK
0.2230%
42
Kraken
LINK-EUR$23.51
0.0064957 Eth
$1,507,993.00
64,131.429 LINK
0.2172%
43
Coinbase Exchange
LINK-EUR$23.50
0.0064962 Eth
$1,506,484.00
64,099.720 LINK
0.2171%
44
FMCPAY
LINK-BTC$23.49
0.0064912 Eth
$1,505,180.00
65,545.900 LINK
0.2220%
45
tanX
LINK-USDC$23.47
0.0064876 Eth
$1,350,237.00
59,783.790 LINK
0.2025%
46
Bybit
LINK-USDC$23.41
0.0064679 Eth
$1,214,287.00
52,957.788 LINK
0.1794%
47
BitStorage
LINK-USDT$23.51
0.0064965 Eth
$1,185,369.00
50,417.360 LINK
0.1708%
48
Kraken
LINK-USDT$23.38
0.0064594 Eth
$1,166,930.00
49,905.954 LINK
0.1691%
49
WhiteBIT
LINK-BTC$23.49
0.0064966 Eth
$1,092,386.00
46,509.200 LINK
0.1575%
50
EarnBIT
LINK-USDT$23.54
0.0065051 Eth
$1,046,831.00
45,877.175 LINK
0.1554%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.50
0.0064930 Eth
$1,032,630.00
43,939.762 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1488%
52
Bitbank
LINK-JPY$23.49
0.0064900 Eth
$929,595.00
39,568.273 LINK
0.1340%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.49
0.0064894 Eth
$875,605.00
37,177.752 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1259%
54
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.42
0.0064718 Eth
$771,754.00
32,865.904 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1113%
55
Binance
LINK-EUR$23.25
0.0064259 Eth
$768,900.00
33,872.160 LINK
0.1147%
56
WhiteBIT
LINK-TRY$23.47
0.0064914 Eth
$758,447.00
32,317.130 LINK
0.1095%
57
Koinpark
LINK-USDT$23.48
0.0064893 Eth
$753,740.00
32,103.689 LINK
0.1087%
58
Gemini
LINK-USD$23.49
0.0064911 Eth
$750,662.00
31,950.673 LINK
0.1082%
59
Coinbase Exchange
LINK-GBP$23.51
0.0065039 Eth
$707,900.00
30,115.460 LINK
0.1020%
60
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.40
0.0064669 Eth
$695,778.00
46,334.288 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1570%
61
itBit
LINK-USD$23.48
0.0064945 Eth
$622,885.00
26,528.314 LINK
0.0899%
62
ProBit Global
LINK-BTC$23.39
0.0064745 Eth
$604,559.00
25,847.119 LINK
0.0876%
63
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.35
0.0064515 Eth
$598,974.00
26,218.049 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0888%
64
Binance
LINK-TRY$23.39
0.0064726 Eth
$585,401.00
25,650.230 LINK
0.0869%
65
BigONE
LINK-USDT$23.50
0.0064935 Eth
$573,325.00
24,396.460 LINK
0.0826%
66
Coinbase Exchange
LINK-ETH$23.47
0.0064848 Eth
$504,481.00
21,494.670 LINK
0.0728%
67
GMO Japan
LINK-JPY$23.44
0.0064880 Eth
$489,839.00
20,895.600 LINK
0.0708%
68
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.37
0.0064560 Eth
$450,317.00
19,230.913 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0651%
69
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.41
0.0064678 Eth
$442,621.00
423,291.830 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.4339%
70
HashKey Exchange
LINK-USD$23.51
0.0065054 Eth
$433,575.00
19,340.604 LINK
0.0655%
71
Slex
LINK-ETH$23.44
0.0064797 Eth
$426,219.00
18,243.660 LINK
0.0618%
72
Coinbase Exchange
LINK-BTC$23.49
0.0064926 Eth
$423,828.00
18,042.500 LINK
0.0611%
73
Coinbase Exchange
LINK-USDT$23.37
0.0064586 Eth
$421,838.00
18,047.223 LINK
0.0611%
74
Bitkub
LINK-THB$23.36
0.0064539 Eth
$371,934.00
15,923.728 LINK
0.0539%
75
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.51
0.0064948 Eth
$304,458.00
294,225.806 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.9967%
76
BitMart
LINK-BTC$23.50
0.0064927 Eth
$286,340.00
12,186.060 LINK
0.0413%
77
OKX
LINK-USDC$23.53
0.0065001 Eth
$276,088.00
12,098.458 LINK
0.0410%
78
BTCMarkets
LINK-AUD$23.27
0.0064315 Eth
$265,554.00
11,411.737 LINK
0.0387%
79
KuCoin
LINK-USDC$23.36
0.0064540 Eth
$258,514.00
11,065.084 LINK
0.0375%
80
LATOKEN
LINK-BTC$23.45
0.0064868 Eth
$249,403.00
10,634.537 LINK
0.0360%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.42
0.0064708 Eth
$244,671.00
10,749.487 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0364%
82
Bitci TR
LINK-TRY$23.51
0.0065054 Eth
$228,665.00
10,126.270 LINK
0.0343%
83
Coinone
LINK-KRW$23.58
0.0065149 Eth
$206,126.00
8,741.251 LINK
0.0296%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.50
0.0064930 Eth
$192,576.00
8,144.764 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0276%
85
PointPay
LINK-BTC$23.38
0.0064710 Eth
$191,775.00
8,308.887 LINK
0.0281%
86
Bitexen
LINK-TRY$23.21
0.0064114 Eth
$182,056.00
7,843.782 LINK
0.0266%
87
BitStorage
LINK-ETH$23.44
0.0064842 Eth
$181,878.00
7,758.350 LINK
0.0263%
88
Binance
LINK-BRL$23.48
0.0064981 Eth
$163,284.00
7,155.660 LINK
0.0242%
89
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.33
0.0064479 Eth
$161,119.00
6,894.280 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0234%
90
Bitso
LINK-USD$23.50
0.0064936 Eth
$135,949.00
5,786.246 LINK
0.0196%
91
Hotcoin
LINK-BTC$23.45
0.0064892 Eth
$134,743.00
5,745.210 LINK
0.0195%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.45
0.0064818 Eth
$132,432.00
5,657.748 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0192%
93
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.39
0.0064737 Eth
$124,979.00
5,493.930 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0186%
94
Binance US
LINK-USDT$23.38
0.0064709 Eth
$118,820.00
5,081.995 LINK
0.0172%
95
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.56
0.0065113 Eth
$100,267.00
4,474.082 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0152%
96
Mercado Bitcoin
LINK-BRL$23.58
0.0065163 Eth
$78,482.00
3,327.747 LINK
0.0113%
97
Kraken
LINK-GBP$23.49
0.0064884 Eth
$76,307.00
3,248.808 LINK
0.0110%
98
Independent Reserve
LINK-AUD$23.50
0.0064962 Eth
$64,054.00
2,725.188 LINK
0.0092%
99
Coins.ph
LINK-PHP$23.54
0.0065032 Eth
$59,451.00
2,608.145 LINK
0.0088%
100
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.46
0.0064808 Eth
$54,453.00
2,321.768 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0079%

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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