ETH Price: $3,325.27 (-4.11%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,674 ( 0.042%)

Market

Price

$22.77 @ 0.006848 ETH (-7.21%)

Onchain Market Cap

$22,770,000,000.00

Circulating Supply Market Cap

$14,368,176,079.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.000098594457401798 LINK

Value
$0.00 ( ~0 Eth) [0.0000%]
0xb23967853e831765872df929cf2e90bd9f53dfe0
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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 20600% |ETH 0.0003846 1680.55%

Market

Volume (24H):$976,745,460.00
Market Capitalization:$14,368,176,079.00
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
WhiteBIT
LINK-USDT$22.81
0.0068435 Eth
$37,352,489.00
1,637,509.880 LINK
9.8258%
2
Coinbase Exchange
LINK-USD$22.76
0.0068450 Eth
$36,793,977.00
1,616,962.310 LINK
9.7025%
3
MEXC
LINK-USDT$22.79
0.0068620 Eth
$29,699,241.00
1,303,052.580 LINK
7.8189%
4
Bybit
LINK-USDT$22.79
0.0068600 Eth
$28,773,499.00
1,220,232.928 LINK
7.3219%
5
Slex
LINK-USDT$22.75
0.0068413 Eth
$23,767,100.00
1,008,898.930 LINK
6.0538%
6
CoinW
LINK-USDT$22.75
0.0068456 Eth
$21,226,363.00
932,903.680 LINK
5.5978%
7
OKX
LINK-USDT$22.79
0.0068605 Eth
$18,128,787.00
772,748.219 LINK
4.6368%
8
DigiFinex
LINK-USDT$22.79
0.0068610 Eth
$13,140,912.00
576,647.360 LINK
3.4601%
9
HTX
LINK-USDT$22.80
0.0068657 Eth
$11,342,818.00
482,529.814 LINK
2.8954%
10
XT.COM
LINK-USDT$22.77
0.0068563 Eth
$10,190,328.00
434,629.550 LINK
2.6080%
11
Azbit
LINK-USDT$22.82
0.0068442 Eth
$10,174,820.00
434,045.312 LINK
2.6045%
12
Coinstore
LINK-USDT$22.76
0.0068373 Eth
$8,944,082.00
381,403.390 LINK
2.2886%
13
Bitunix
LINK-USDT$22.80
0.0068635 Eth
$8,154,027.00
357,600.700 LINK
2.1458%
14
BTSE
LINK-USDT$22.76
0.0068484 Eth
$8,130,183.00
357,216.901 LINK
2.1435%
15
Binance
LINK-FDUSD$22.71
0.0068339 Eth
$8,081,397.00
343,807.260 LINK
2.0630%
16
Biconomy.com
LINK-USDT$22.79
0.0068626 Eth
$6,984,330.00
296,702.234 LINK
1.7803%
17
Kraken
LINK-USD$22.78
0.0068585 Eth
$6,680,360.00
293,250.733 LINK
1.7596%
18
BYDFi
LINK-USDT$22.84
0.0068479 Eth
$6,285,697.00
275,207.590 LINK
1.6514%
19
KuCoin
LINK-USDT$22.79
0.0068614 Eth
$5,445,710.00
238,952.027 LINK
1.4338%
20
Hotcoin
LINK-USDT$22.76
0.0068410 Eth
$5,178,794.00
227,542.410 LINK
1.3654%
21
LATOKEN
LINK-USDT$22.78
0.0068530 Eth
$4,984,805.00
218,822.815 LINK
1.3130%
22
LBank
LINK-USDT$22.80
0.0068411 Eth
$4,568,494.00
200,349.250 LINK
1.2022%
23
Binance
LINK-USDC$22.75
0.0068457 Eth
$3,726,790.00
159,739.170 LINK
0.9585%
24
Dex-Trade
LINK-USDT$22.79
0.0068456 Eth
$3,245,307.00
142,424.740 LINK
0.8546%
25
Coinbase Exchange
LINK-GBP$22.80
0.0068634 Eth
$2,759,567.00
121,050.650 LINK
0.7264%
26
Bitvavo
LINK-EUR$22.77
0.0068447 Eth
$2,431,641.00
106,770.996 LINK
0.6407%
27
Dcoin
LINK-USDT$22.79
0.0068432 Eth
$2,378,388.00
104,354.000 LINK
0.6262%
28
ProBit Global
LINK-USDT$22.79
0.0068484 Eth
$2,252,845.00
98,839.581 LINK
0.5931%
29
CoinEx
LINK-USDT$22.77
0.0068550 Eth
$2,149,912.00
92,123.111 LINK
0.5528%
30
PointPay
LINK-USDT$22.81
0.0068397 Eth
$1,655,167.00
70,686.486 LINK
0.4241%
31
Bitbank
LINK-JPY$22.88
0.0068849 Eth
$1,521,056.00
66,475.143 LINK
0.3989%
32
EXMO
LINK-USDT$22.81
0.0068685 Eth
$1,430,917.00
62,722.727 LINK
0.3764%
33
Bitstamp
LINK-USD$22.78
0.0068584 Eth
$1,366,910.00
60,004.836 LINK
0.3601%
34
WhiteBIT
LINK-BTC$22.75
0.0068467 Eth
$1,239,113.00
54,455.700 LINK
0.3268%
35
Phemex
LINK-USDT$22.79
0.0068465 Eth
$1,225,981.00
53,798.980 LINK
0.3228%
36
WhiteBIT
LINK-TRY$22.90
0.0068917 Eth
$1,214,952.00
53,045.820 LINK
0.3183%
37
Coinbase Exchange
LINK-EUR$22.79
0.0068619 Eth
$1,196,854.00
52,513.130 LINK
0.3151%
38
Bitstamp
LINK-EUR$22.82
0.0068713 Eth
$1,122,291.00
49,174.135 LINK
0.2951%
39
tanX
LINK-USDC$22.80
0.0068583 Eth
$1,100,656.00
46,621.920 LINK
0.2798%
40
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$22.74
0.0068451 Eth
$961,366.00
41,708.298 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2503%
41
Trubit
LINK-USDT$22.76
0.0068399 Eth
$952,136.00
40,416.750 LINK
0.2425%
42
Bybit
LINK-USDC$22.78
0.0068574 Eth
$947,984.00
40,606.109 LINK
0.2437%
43
EarnBIT
LINK-USDT$22.73
0.0068371 Eth
$878,831.00
37,520.021 LINK
0.2251%
44
BigONE
LINK-USDT$22.66
0.0068190 Eth
$849,459.00
37,483.040 LINK
0.2249%
45
BitStorage
LINK-USDT$22.82
0.0068695 Eth
$823,425.00
36,078.040 LINK
0.2165%
46
itBit
LINK-USD$22.79
0.0068603 Eth
$795,195.00
34,892.255 LINK
0.2094%
47
Azbit
LINK-ETH$22.77
0.0068503 Eth
$697,950.00
30,391.991 LINK
0.1824%
48
ProBit Global
LINK-BTC$22.79
0.0068564 Eth
$662,328.00
29,066.924 LINK
0.1744%
49
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$22.71
0.0068368 Eth
$555,728.00
23,924.199 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1436%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.83
0.0068713 Eth
$514,842.00
22,248.174 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1335%
51
Koinpark
LINK-USDT$22.76
0.0068480 Eth
$510,743.00
22,439.398 LINK
0.1346%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.75
0.0068481 Eth
$502,191.00
22,117.774 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1327%
53
Binance
LINK-EUR$22.80
0.0068547 Eth
$473,282.00
20,234.360 LINK
0.1214%
54
HashKey Exchange
LINK-USD$22.80
0.0068504 Eth
$461,358.00
19,813.128 LINK
0.1189%
55
Coinbase Exchange
LINK-USDT$22.74
0.0068343 Eth
$454,219.00
19,974.684 LINK
0.1199%
56
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$22.74
0.0068451 Eth
$441,601.00
18,741.255 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1125%
57
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.77
0.0068556 Eth
$437,583.00
455,330.124 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.7322%
58
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$22.69
0.0068250 Eth
$427,517.00
18,470.188 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1108%
59
Slex
LINK-ETH$22.76
0.0068407 Eth
$407,025.00
17,724.510 LINK
0.1064%
60
GMO Japan
LINK-JPY$22.81
0.0068621 Eth
$398,995.00
17,491.800 LINK
0.1050%
61
BitMart
LINK-BTC$22.75
0.0068429 Eth
$360,196.00
15,835.260 LINK
0.0950%
62
WhiteBIT
LINK-EUR$22.78
0.0068536 Eth
$353,814.00
15,530.310 LINK
0.0932%
63
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.83
0.0068713 Eth
$296,241.00
305,384.685 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.8324%
64
OKX
LINK-USDC$22.77
0.0068545 Eth
$285,393.00
12,142.578 LINK
0.0729%
65
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.79
0.0068615 Eth
$281,141.00
12,255.573 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0735%
66
BitDelta
LINK-USDT$22.75
0.0068434 Eth
$273,319.00
11,596.000 LINK
0.0696%
67
Gemini
LINK-USD$22.74
0.0068460 Eth
$268,346.00
11,801.185 LINK
0.0708%
68
LATOKEN
LINK-BTC$22.80
0.0068655 Eth
$263,124.00
11,538.732 LINK
0.0692%
69
Coinbase Exchange
LINK-BTC$22.77
0.0068505 Eth
$260,507.00
11,441.240 LINK
0.0687%
70
Bitkub
LINK-THB$22.79
0.0068354 Eth
$254,497.00
11,165.079 LINK
0.0670%
71
Bitci TR
LINK-TRY$23.01
0.0069221 Eth
$239,742.00
10,093.891 LINK
0.0606%
72
Nonkyc.io
LINK-USDT$22.71
0.0068216 Eth
$232,759.00
9,973.393 LINK
0.0598%
73
Coinbase Exchange
LINK-ETH$22.73
0.0068387 Eth
$224,074.00
9,856.240 LINK
0.0591%
74
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.69
0.0068255 Eth
$220,269.00
9,358.396 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0562%
75
Binance
LINK-BRL$22.90
0.0068839 Eth
$214,278.00
9,021.830 LINK
0.0541%
76
bitcastle
LINK-USDT$22.80
0.0068363 Eth
$212,582.00
9,057.460 LINK
0.0543%
77
PointPay
LINK-BTC$22.80
0.0068364 Eth
$202,717.00
8,768.884 LINK
0.0526%
78
Hotcoin
LINK-BTC$22.77
0.0068499 Eth
$181,940.00
7,991.330 LINK
0.0480%
79
BitStorage
LINK-ETH$22.73
0.0068433 Eth
$169,916.00
7,475.440 LINK
0.0449%
80
BitMart
LINK-ETH$22.74
0.0068430 Eth
$158,548.00
6,973.600 LINK
0.0418%
81
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$22.98
0.0069176 Eth
$150,556.00
11,581.418 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0695%
82
BTCMarkets
LINK-AUD$22.97
0.0069016 Eth
$144,074.00
6,272.242 LINK
0.0376%
83
KuCoin
LINK-USDC$22.78
0.0068597 Eth
$121,787.00
5,345.240 LINK
0.0321%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.73
0.0068420 Eth
$118,408.00
5,172.357 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0310%
85
Binance US
LINK-USDT$22.76
0.0068533 Eth
$114,747.00
5,040.953 LINK
0.0302%
86
OKX
LINK-EUR$22.69
0.0068301 Eth
$114,483.00
4,962.025 LINK
0.0298%
87
Bitso
LINK-USD$22.76
0.0068518 Eth
$94,091.00
4,133.753 LINK
0.0248%
88
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$22.74
0.0068451 Eth
$79,202.00
82,149.263 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4929%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.65
0.0068168 Eth
$76,728.00
3,383.037 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0203%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$22.83
0.0068713 Eth
$76,061.00
3,236.581 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0194%
91
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$22.85
0.0068739 Eth
$65,833.00
2,854.570 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0171%
92
Hotcoin
LINK-ETH$22.74
0.0068389 Eth
$63,499.00
2,792.630 LINK
0.0168%
93
KuCoin
LINK-BTC$22.80
0.0068649 Eth
$58,344.00
2,558.751 LINK
0.0154%
94
Nonkyc.io
LINK-BTC$22.65
0.0068193 Eth
$50,599.00
2,197.664 LINK
0.0132%
95
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$22.74
0.0068451 Eth
$42,789.00
1,847.871 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0111%
96
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$22.77
0.0068536 Eth
$18,550.02
25.288 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
97
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$22.88
0.0068862 Eth
$15,765.79
690.689 0X5947BB275C521040051D82396192181B413227A3
0.0041%
98
Gemini
LINK-BTC$22.65
0.0068189 Eth
$14,284.74
630.706 LINK
0.0038%
99
Bitstamp
LINK-BTC$22.68
0.0068273 Eth
$10,073.17
444.212 LINK
0.0027%
100
Bitexen
LINK-TRY$22.78
0.0068307 Eth
$8,897.83
390.544 LINK
0.0023%

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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