ETH Price: $2,708.01 (-2.70%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

738,325 ( 0.028%)

Market

Price

$17.52 @ 0.006470 ETH (-6.08%)

Onchain Market Cap

$17,520,000,000.00

Circulating Supply Market Cap

$11,199,903,808.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xf7afd8b0399e7a8570f943c5a309cf24270ad9ed
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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 15827.27% |ETH 0.0003846 1582.27%

Market

Volume (24H):$843,910,060.00
Market Capitalization:$11,199,903,808.00
Circulating Supply:638,099,970.00 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
WhiteBIT
LINK-USDT$17.54
0.0064779 Eth
$95,014,352.00
5,417,273.280 LINK
15.6229%
2
Binance
LINK-USDT$17.52
0.0064676 Eth
$85,352,848.00
4,744,821.630 LINK
13.6836%
3
Bybit
LINK-USDT$17.50
0.0064602 Eth
$62,787,755.00
3,510,079.139 LINK
10.1227%
4
MEXC
LINK-USDT$17.54
0.0064738 Eth
$46,758,741.00
2,666,408.470 LINK
7.6897%
5
Coinbase Exchange
LINK-USD$17.52
0.0064676 Eth
$30,880,049.00
1,762,660.460 LINK
5.0834%
6
Bitget
LINK-USDT$17.53
0.0064713 Eth
$30,382,622.00
1,696,319.936 LINK
4.8920%
7
HTX
LINK-USDT$17.53
0.0064709 Eth
$20,719,035.00
1,162,238.414 LINK
3.3518%
8
Gate.io
LINK-USDT$17.53
0.0064714 Eth
$15,203,462.00
846,013.000 LINK
2.4398%
9
P2B
LINK-USDT$17.51
0.0064636 Eth
$15,196,851.00
868,105.430 LINK
2.5035%
10
OKX
LINK-USDT$17.52
0.0064698 Eth
$14,618,379.00
819,104.503 LINK
2.3622%
11
Slex
LINK-USDT$17.53
0.0064709 Eth
$11,308,777.00
630,361.600 LINK
1.8179%
12
DigiFinex
LINK-USDT$17.52
0.0064682 Eth
$10,960,871.00
625,669.360 LINK
1.8044%
13
KuCoin
LINK-USDT$17.52
0.0064683 Eth
$8,764,513.00
500,288.125 LINK
1.4428%
14
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.46
0.0064450 Eth
$8,719,924.00
489,046.475 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.4104%
15
XT.COM
LINK-USDT$17.54
0.0065038 Eth
$8,566,575.00
475,808.930 LINK
1.3722%
16
MEXC
LINK-EUR$17.53
0.0064754 Eth
$8,069,894.00
460,366.290 LINK
1.3277%
17
MEXC
LINK-USDC$17.58
0.0064896 Eth
$7,741,865.00
440,412.100 LINK
1.2701%
18
LBank
LINK-USDT$17.53
0.0064707 Eth
$7,390,116.00
421,619.880 LINK
1.2159%
19
Coinstore
LINK-USDT$17.51
0.0064658 Eth
$7,227,395.00
402,365.060 LINK
1.1604%
20
Binance
LINK-FDUSD$17.53
0.0064729 Eth
$7,121,997.00
395,497.390 LINK
1.1406%
21
Binance
LINK-USDC$17.52
0.0064684 Eth
$6,765,216.00
376,478.290 LINK
1.0857%
22
Kraken
LINK-USD$17.52
0.0064682 Eth
$6,555,102.00
374,187.878 LINK
1.0791%
23
CoinW
LINK-USDT$17.55
0.0064928 Eth
$6,253,799.00
356,410.720 LINK
1.0279%
24
Bitunix
LINK-USDT$17.51
0.0064726 Eth
$5,875,956.00
335,451.640 LINK
0.9674%
25
Azbit
LINK-USDT$17.53
0.0064707 Eth
$5,094,000.00
283,133.091 LINK
0.8165%
26
BYDFi
LINK-USDT$17.44
0.0064827 Eth
$4,721,148.00
270,631.370 LINK
0.7805%
27
BTSE
LINK-USDT$17.51
0.0064729 Eth
$4,033,418.00
230,317.129 LINK
0.6642%
28
LATOKEN
LINK-USDT$17.50
0.0064985 Eth
$3,990,076.00
228,069.345 LINK
0.6577%
29
QMall
LINK-USDT$17.52
0.0064741 Eth
$3,479,697.00
193,631.835 LINK
0.5584%
30
CoinEx
LINK-USDT$17.52
0.0064691 Eth
$2,877,727.00
163,334.075 LINK
0.4710%
31
Dex-Trade
LINK-USDT$17.55
0.0064855 Eth
$2,597,747.00
148,048.877 LINK
0.4270%
32
Bitvavo
LINK-EUR$17.53
0.0064770 Eth
$2,571,251.00
146,718.116 LINK
0.4231%
33
FMCPAY
LINK-USDT$17.56
0.0064818 Eth
$2,436,968.00
135,512.261 LINK
0.3908%
34
Biconomy.com
LINK-USDT$17.52
0.0064736 Eth
$1,985,780.00
111,434.690 LINK
0.3214%
35
Coinbase Exchange
LINK-EUR$17.54
0.0064760 Eth
$1,709,954.00
97,490.190 LINK
0.2812%
36
Coinbase Exchange
LINK-GBP$17.53
0.0064731 Eth
$1,696,113.00
96,744.800 LINK
0.2790%
37
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.54
0.0064747 Eth
$1,589,810.00
88,810.905 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2561%
38
PointPay
LINK-USDT$17.53
0.0064708 Eth
$1,365,887.00
75,960.527 LINK
0.2191%
39
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.54
0.0064770 Eth
$1,338,489.00
74,395.781 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2146%
40
Bybit
LINK-USDC$17.49
0.0064581 Eth
$1,294,020.00
73,908.034 LINK
0.2131%
41
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.53
0.0064731 Eth
$1,253,851.00
70,016.955 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2019%
42
FMCPAY
LINK-ETH$17.51
0.0064716 Eth
$1,120,603.00
62,760.480 LINK
0.1810%
43
Binance
LINK-ETH$17.54
0.0064790 Eth
$1,081,254.00
60,457.330 LINK
0.1744%
44
FMCPAY
LINK-BTC$17.51
0.0064699 Eth
$1,006,251.00
56,604.500 LINK
0.1632%
45
BigONE
LINK-USDT$17.54
0.0065142 Eth
$947,971.00
54,054.670 LINK
0.1559%
46
Phemex
LINK-USDT$17.53
0.0064709 Eth
$845,942.00
48,268.220 LINK
0.1392%
47
Trubit
LINK-USDT$17.55
0.0064915 Eth
$845,173.00
47,312.140 LINK
0.1364%
48
WhiteBIT
LINK-BTC$17.53
0.0064722 Eth
$804,105.00
45,868.950 LINK
0.1323%
49
EXMO
LINK-USDT$17.53
0.0064740 Eth
$780,797.00
44,529.790 LINK
0.1284%
50
Gemini
LINK-USD$17.54
0.0064779 Eth
$752,490.00
42,889.915 LINK
0.1237%
51
LATOKEN
LINK-BTC$17.54
0.0064757 Eth
$724,791.00
41,325.114 LINK
0.1192%
52
EarnBIT
LINK-USDT$17.54
0.0064827 Eth
$706,940.00
39,558.811 LINK
0.1141%
53
BitStorage
LINK-USDT$17.56
0.0064899 Eth
$687,439.00
39,148.040 LINK
0.1129%
54
Tokpie
LINK-USDT$17.46
0.0064453 Eth
$670,925.00
38,428.536 LINK
0.1108%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.52
0.0064695 Eth
$650,375.00
37,036.907 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1068%
56
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.56
0.0064820 Eth
$648,224.00
35,996.081 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1038%
57
tanX
LINK-USDC$17.56
0.0064864 Eth
$624,221.00
34,689.180 LINK
0.1000%
58
Binance
LINK-TRY$17.62
0.0065115 Eth
$613,427.00
33,952.200 LINK
0.0979%
59
Bitbank
LINK-JPY$17.60
0.0064967 Eth
$545,673.00
31,007.966 LINK
0.0894%
60
QMall
LINK-USDC$17.55
0.0064904 Eth
$535,004.00
29,776.004 LINK
0.0859%
61
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.56
0.0064820 Eth
$522,354.00
541,733.842 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.5623%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.51
0.0064637 Eth
$504,047.00
28,168.991 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0812%
63
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.54
0.0064736 Eth
$491,953.00
55,776.798 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1609%
64
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.56
0.0064836 Eth
$442,544.00
24,714.721 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0713%
65
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.55
0.0064830 Eth
$360,048.00
375,964.451 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
1.0842%
66
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.57
0.0064881 Eth
$337,098.00
18,532.570 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0534%
67
XT.COM
LINK-ETH$17.52
0.0064676 Eth
$296,252.00
16,566.320 LINK
0.0478%
68
BitMart
LINK-BTC$17.53
0.0064724 Eth
$295,022.00
16,829.640 LINK
0.0485%
69
itBit
LINK-USD$17.53
0.0064756 Eth
$275,697.00
15,727.140 LINK
0.0454%
70
Mercado Bitcoin
LINK-BRL$17.61
0.0065018 Eth
$266,638.00
15,139.692 LINK
0.0437%
71
Hotcoin
LINK-BTC$17.54
0.0064750 Eth
$255,216.00
14,551.260 LINK
0.0420%
72
Slex
LINK-ETH$17.53
0.0064751 Eth
$254,857.00
14,299.110 LINK
0.0412%
73
GMO Japan
LINK-JPY$17.59
0.0064945 Eth
$247,308.00
14,059.800 LINK
0.0405%
74
BitStorage
LINK-ETH$17.53
0.0064742 Eth
$238,182.00
13,583.710 LINK
0.0392%
75
Coinbase Exchange
LINK-BTC$17.52
0.0064672 Eth
$237,206.00
13,542.750 LINK
0.0391%
76
BYDFi
LINK-USDC$17.52
0.0064740 Eth
$229,567.00
13,100.570 LINK
0.0378%
77
BitDelta
LINK-USDT$17.53
0.0064710 Eth
$225,063.00
12,554.000 LINK
0.0362%
78
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.55
0.0064792 Eth
$222,582.00
12,363.737 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0357%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.52
0.0064675 Eth
$221,359.00
12,380.257 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0357%
80
OKX
LINK-USDC$17.53
0.0064721 Eth
$212,471.00
11,884.535 LINK
0.0343%
81
Bitkub
LINK-THB$17.58
0.0064956 Eth
$205,632.00
11,694.145 LINK
0.0337%
82
WhiteBIT
LINK-TRY$17.67
0.0065253 Eth
$186,586.00
10,556.970 LINK
0.0304%
83
KuCoin
LINK-USDC$17.54
0.0064768 Eth
$184,720.00
10,530.323 LINK
0.0304%
84
bitcastle
LINK-USDT$17.51
0.0064705 Eth
$171,573.00
9,565.890 LINK
0.0276%
85
Bitbegin
LINK-USDT$17.53
0.0064737 Eth
$158,300.00
8,852.895 LINK
0.0255%
86
WhiteBIT
LINK-EUR$17.52
0.0064679 Eth
$155,352.00
8,868.250 LINK
0.0256%
87
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.51
0.0064705 Eth
$135,542.00
7,514.895 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0217%
88
Foxbit
LINK-BRL$17.52
0.0064669 Eth
$125,226.00
6,976.900 LINK
0.0201%
89
Bitso
LINK-USD$17.56
0.0064826 Eth
$124,764.00
7,106.160 LINK
0.0205%
90
CoinTR
LINK-TRY$17.61
0.0065043 Eth
$122,690.00
6,866.140 LINK
0.0198%
91
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.54
0.0064769 Eth
$109,220.00
6,096.981 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0176%
92
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.53
0.0064718 Eth
$107,528.00
110,822.014 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3196%
93
Binance US
LINK-USDT$17.45
0.0064485 Eth
$107,326.00
6,151.781 LINK
0.0177%
94
KuCoin
LINK-BTC$17.55
0.0064813 Eth
$106,871.00
6,088.117 LINK
0.0176%
95
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.47
0.0064503 Eth
$101,991.00
106,725.347 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3078%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.57
0.0064875 Eth
$91,594.00
5,144.230 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0148%
97
HTX
LINK-BTC$17.53
0.0064724 Eth
$83,777.00
4,765.020 LINK
0.0137%
98
PointPay
LINK-BTC$17.51
0.0064724 Eth
$82,146.00
4,615.215 LINK
0.0133%
99
Hotcoin
LINK-ETH$17.53
0.0064716 Eth
$74,244.00
4,235.570 LINK
0.0122%
100
Dex-Trade
LINK-ETH$17.53
0.0064779 Eth
$29,983.00
1,710.760 LINK
0.0049%

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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