ETH Price: $3,348.97 (+0.41%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,355 ( -0.001%)

Market

Price

$20.08 @ 0.005996 ETH (-0.95%)

Onchain Market Cap

$20,080,000,000.00

Circulating Supply Market Cap

$12,680,735,454.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
2,920.721284927965412267 LINK

Value
$58,648.08 ( ~17.5123 Eth) [0.0003%]
0x499Ee0861D3F9A192B296521429bB8AAF2F34F4f
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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 18154.55% |ETH 0.0003846 1459.02%

Market

Volume (24H):$783,759,264.00
Market Capitalization:$12,680,735,454.00
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$20.10
0.0060025 Eth
$92,951,692.00
4,557,802.050 LINK
19.1420%
2
Coinbase Exchange
LINK-USD$20.10
0.0060129 Eth
$47,054,018.00
2,340,530.130 LINK
9.8298%
3
WhiteBIT
LINK-USDT$20.10
0.0060100 Eth
$25,541,149.00
1,270,625.020 LINK
5.3364%
4
Bitget
LINK-USDT$20.09
0.0060026 Eth
$22,015,552.00
1,077,080.202 LINK
4.5236%
5
Slex
LINK-USDT$20.10
0.0060055 Eth
$21,647,007.00
1,064,469.150 LINK
4.4706%
6
MEXC
LINK-USDT$20.04
0.0059874 Eth
$18,824,290.00
939,140.950 LINK
3.9442%
7
Bybit
LINK-USDT$20.10
0.0060053 Eth
$18,580,183.00
909,446.488 LINK
3.8195%
8
P2B
LINK-USDT$20.06
0.0059920 Eth
$17,158,187.00
855,490.400 LINK
3.5929%
9
CoinW
LINK-USDT$20.09
0.0060022 Eth
$17,009,382.00
846,753.310 LINK
3.5562%
10
OKX
LINK-USDT$20.08
0.0059999 Eth
$12,770,934.00
625,256.302 LINK
2.6260%
11
Gate.io
LINK-USDT$20.09
0.0060030 Eth
$12,515,028.00
611,102.140 LINK
2.5665%
12
DigiFinex
LINK-USDT$20.09
0.0060042 Eth
$11,537,684.00
574,168.480 LINK
2.4114%
13
HTX
LINK-USDT$20.10
0.0060056 Eth
$9,475,056.00
465,645.524 LINK
1.9556%
14
XT.COM
LINK-USDT$20.07
0.0059976 Eth
$9,302,817.00
456,160.670 LINK
1.9158%
15
Azbit
LINK-USDT$20.07
0.0059965 Eth
$9,254,916.00
453,757.858 LINK
1.9057%
16
Coinstore
LINK-USDT$20.05
0.0059887 Eth
$8,221,270.00
403,297.200 LINK
1.6938%
17
Binance
LINK-FDUSD$20.08
0.0060010 Eth
$8,113,667.00
398,165.740 LINK
1.6722%
18
Bitunix
LINK-USDT$20.10
0.0060029 Eth
$6,974,749.00
347,074.120 LINK
1.4577%
19
Binance
LINK-USDC$20.08
0.0059971 Eth
$5,844,952.00
287,595.330 LINK
1.2079%
20
LBank
LINK-USDT$20.10
0.0060090 Eth
$5,747,555.00
285,978.700 LINK
1.2011%
21
BYDFi
LINK-USDT$20.08
0.0059953 Eth
$5,683,037.00
283,067.210 LINK
1.1888%
22
Biconomy.com
LINK-USDT$20.07
0.0059947 Eth
$5,574,726.00
273,831.700 LINK
1.1500%
23
BTSE
LINK-USDT$20.08
0.0059969 Eth
$5,443,755.00
271,149.795 LINK
1.1388%
24
LATOKEN
LINK-USDT$20.09
0.0060016 Eth
$4,473,121.00
222,698.328 LINK
0.9353%
25
QMall
LINK-USDT$20.12
0.0060091 Eth
$3,801,549.00
186,355.800 LINK
0.7827%
26
Hotcoin
LINK-USDT$20.07
0.0059958 Eth
$3,757,967.00
187,276.540 LINK
0.7865%
27
KuCoin
LINK-USDT$20.11
0.0060101 Eth
$3,460,868.00
172,074.437 LINK
0.7227%
28
Kraken
LINK-USD$20.06
0.0059947 Eth
$3,153,605.00
157,171.261 LINK
0.6601%
29
Dex-Trade
LINK-USDT$20.11
0.0060080 Eth
$2,933,988.00
145,927.229 LINK
0.6129%
30
Bitstamp
LINK-EUR$20.13
0.0060150 Eth
$2,909,445.00
144,527.600 LINK
0.6070%
31
Bitvavo
LINK-EUR$20.07
0.0059966 Eth
$2,480,009.00
123,538.235 LINK
0.5188%
32
FMCPAY
LINK-USDT$20.05
0.0059904 Eth
$2,301,663.00
113,089.702 LINK
0.4750%
33
Dcoin
LINK-USDT$20.09
0.0060024 Eth
$2,033,886.00
101,236.000 LINK
0.4252%
34
Bitstamp
LINK-USD$20.08
0.0059999 Eth
$1,998,857.00
99,544.682 LINK
0.4181%
35
CoinEx
LINK-USDT$20.10
0.0060028 Eth
$1,806,003.00
89,061.549 LINK
0.3740%
36
PointPay
LINK-USDT$20.08
0.0059998 Eth
$1,499,264.00
73,485.868 LINK
0.3086%
37
Bitbank
LINK-JPY$20.20
0.0060373 Eth
$1,432,926.00
70,923.953 LINK
0.2979%
38
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.02
0.0059827 Eth
$1,271,673.00
62,506.892 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2625%
39
EXMO
LINK-USDT$20.10
0.0060049 Eth
$1,244,303.00
61,914.729 LINK
0.2600%
40
FMCPAY
LINK-ETH$20.10
0.0060011 Eth
$1,229,655.00
60,746.080 LINK
0.2551%
41
FMCPAY
LINK-BTC$20.08
0.0059978 Eth
$1,164,187.00
57,367.200 LINK
0.2409%
42
Phemex
LINK-USDT$20.10
0.0060055 Eth
$1,080,586.00
53,763.060 LINK
0.2258%
43
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$20.21
0.0060433 Eth
$1,066,226.00
51,573.389 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.2166%
44
tanX
LINK-USDC$20.12
0.0060104 Eth
$988,887.00
48,434.510 LINK
0.2034%
45
Bybit
LINK-USDC$20.07
0.0059959 Eth
$900,506.00
44,184.325 LINK
0.1856%
46
Coinbase Exchange
LINK-USDT$20.02
0.0059817 Eth
$886,868.00
44,300.856 LINK
0.1861%
47
Coinbase Exchange
LINK-EUR$20.08
0.0059990 Eth
$870,146.00
43,336.180 LINK
0.1820%
48
WhiteBIT
LINK-TRY$20.18
0.0060292 Eth
$860,242.00
42,631.950 LINK
0.1790%
49
Trubit
LINK-USDT$20.03
0.0059734 Eth
$805,953.00
39,621.000 LINK
0.1664%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.15
0.0060190 Eth
$760,235.00
37,524.545 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1576%
51
BitStorage
LINK-USDT$20.11
0.0060084 Eth
$743,528.00
36,972.120 LINK
0.1553%
52
GMO Japan
LINK-JPY$20.13
0.0060142 Eth
$713,114.00
35,432.300 LINK
0.1488%
53
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.16
0.0060218 Eth
$692,104.00
51,940.091 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2181%
54
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.13
0.0060140 Eth
$654,636.00
665,045.763 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.7931%
55
Gemini
LINK-USD$20.09
0.0060014 Eth
$631,179.00
31,425.140 LINK
0.1320%
56
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.13
0.0060133 Eth
$623,008.00
31,176.676 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1309%
57
EarnBIT
LINK-USDT$20.09
0.0060016 Eth
$619,943.00
30,367.120 LINK
0.1275%
58
BigONE
LINK-USDT$20.16
0.0060296 Eth
$606,200.00
30,067.730 LINK
0.1263%
59
Binance
LINK-EUR$20.12
0.0060098 Eth
$590,706.00
29,095.590 LINK
0.1222%
60
HashKey Exchange
LINK-USD$20.15
0.0060207 Eth
$480,374.00
23,315.121 LINK
0.0979%
61
QMall
LINK-USDC$20.09
0.0060064 Eth
$478,766.00
23,550.658 LINK
0.0989%
62
Koinpark
LINK-USDT$20.08
0.0059972 Eth
$468,296.00
23,323.559 LINK
0.0980%
63
KuCoin
LINK-USDC$20.09
0.0060040 Eth
$431,600.00
21,479.297 LINK
0.0902%
64
Bitbegin
LINK-USDT$20.08
0.0059995 Eth
$430,206.00
21,149.918 LINK
0.0888%
65
Coinbase Exchange
LINK-GBP$20.09
0.0060017 Eth
$389,857.00
19,407.460 LINK
0.0815%
66
itBit
LINK-USD$20.12
0.0060123 Eth
$342,884.00
17,041.950 LINK
0.0716%
67
Slex
LINK-ETH$20.10
0.0060015 Eth
$341,122.00
16,849.560 LINK
0.0708%
68
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.14
0.0060173 Eth
$340,871.00
345,750.557 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.4521%
69
WhiteBIT
LINK-EUR$20.00
0.0059792 Eth
$340,720.00
17,037.500 LINK
0.0716%
70
Coinbase Exchange
LINK-BTC$20.09
0.0060008 Eth
$304,289.00
15,146.510 LINK
0.0636%
71
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.14
0.0060160 Eth
$283,974.00
14,031.736 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0589%
72
BitMart
LINK-BTC$20.07
0.0060013 Eth
$263,617.00
13,133.400 LINK
0.0552%
73
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$20.02
0.0059827 Eth
$244,510.00
11,920.911 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0501%
74
BitDelta
LINK-USDT$20.08
0.0059953 Eth
$230,558.00
11,321.000 LINK
0.0475%
75
OKX
LINK-USDC$20.10
0.0060051 Eth
$227,619.00
11,189.753 LINK
0.0470%
76
Bitci TR
LINK-TRY$20.27
0.0060557 Eth
$206,269.00
10,114.664 LINK
0.0425%
77
Bitkub
LINK-THB$20.13
0.0060140 Eth
$179,431.00
8,915.430 LINK
0.0374%
78
Hotcoin
LINK-BTC$20.09
0.0060032 Eth
$145,223.00
7,227.200 LINK
0.0304%
79
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$20.08
0.0059990 Eth
$138,248.00
6,770.315 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0284%
80
LATOKEN
LINK-BTC$20.10
0.0060067 Eth
$136,168.00
6,774.125 LINK
0.0285%
81
BYDFi
LINK-USDC$20.06
0.0059973 Eth
$135,198.00
6,740.120 LINK
0.0283%
82
Coinbase Exchange
LINK-ETH$19.98
0.0059698 Eth
$132,797.00
6,647.260 LINK
0.0279%
83
BitMart
LINK-ETH$20.06
0.0059989 Eth
$128,626.00
6,410.760 LINK
0.0269%
84
Binance
LINK-BRL$20.25
0.0060512 Eth
$127,189.00
6,178.750 LINK
0.0259%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$20.14
0.0060173 Eth
$120,494.00
5,905.079 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0248%
86
BitStorage
LINK-ETH$20.07
0.0060009 Eth
$114,788.00
5,720.730 LINK
0.0240%
87
Korbit
LINK-KRW$20.29
0.0060615 Eth
$114,071.00
5,499.709 LINK
0.0231%
88
Kraken
LINK-ETH$20.14
0.0060177 Eth
$113,875.00
5,653.725 LINK
0.0237%
89
PointPay
LINK-BTC$20.07
0.0059999 Eth
$101,254.00
4,987.357 LINK
0.0209%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.11
0.0060068 Eth
$99,272.00
4,977.272 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0209%
91
Kraken
LINK-GBP$20.08
0.0059991 Eth
$97,965.00
4,878.920 LINK
0.0205%
92
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$20.05
0.0059903 Eth
$96,299.00
4,736.283 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0199%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.09
0.0060081 Eth
$94,807.00
4,683.399 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0197%
94
Bitso
LINK-USD$20.11
0.0060136 Eth
$72,150.00
3,588.192 LINK
0.0151%
95
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$20.04
0.0059873 Eth
$63,115.00
3,069.109 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0129%
96
Binance US
LINK-USDT$20.03
0.0059804 Eth
$61,907.00
3,091.224 LINK
0.0130%
97
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.11
0.0060092 Eth
$54,599.00
2,677.989 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0112%
98
Hotcoin
LINK-ETH$20.08
0.0059998 Eth
$53,145.00
2,646.910 LINK
0.0111%
99
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.12
0.0060106 Eth
$35,377.00
1,746.514 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0073%
100
Bitstamp
LINK-GBP$20.04
0.0059873 Eth
$24,668.00
1,231.066 LINK
0.0052%

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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