ETH Price: $3,307.89 (-4.53%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,758 ( 0.050%)

Market

Price

$22.51 @ 0.006805 ETH (-7.99%)

Onchain Market Cap

$22,510,000,000.00

Circulating Supply Market Cap

$14,252,383,652.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
1,097.82 LINK

Value
$24,711.93 ( ~7.4706 Eth) [0.0001%]
0x256c66dd9a17BDA419d1CAAAEceC3Df4fE2b6c4A
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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 20363.64% |ETH 0.0003846 1669.37%

Market

Volume (24H):$963,198,933.00
Market Capitalization:$14,252,383,652.00
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$22.48
0.0067832 Eth
$101,212,785.00
4,338,088.770 LINK
21.9281%
2
WhiteBIT
LINK-USDT$22.51
0.0067892 Eth
$37,774,382.00
1,677,789.110 LINK
8.4809%
3
Coinbase Exchange
LINK-USD$22.49
0.0067822 Eth
$35,667,020.00
1,585,835.230 LINK
8.0160%
4
Bybit
LINK-USDT$22.42
0.0067654 Eth
$27,969,020.00
1,193,664.834 LINK
6.0337%
5
Slex
LINK-USDT$22.60
0.0068146 Eth
$23,662,805.00
1,012,035.780 LINK
5.1156%
6
P2B
LINK-USDT$22.64
0.0068215 Eth
$20,010,686.00
883,980.730 LINK
4.4683%
7
OKX
LINK-USDT$22.42
0.0067690 Eth
$17,995,764.00
771,573.420 LINK
3.9001%
8
DigiFinex
LINK-USDT$22.42
0.0067657 Eth
$12,847,262.00
573,035.690 LINK
2.8966%
9
HTX
LINK-USDT$22.49
0.0067866 Eth
$11,292,954.00
484,042.412 LINK
2.4467%
10
Azbit
LINK-USDT$22.50
0.0067909 Eth
$10,051,793.00
430,684.372 LINK
2.1770%
11
XT.COM
LINK-USDT$22.50
0.0067907 Eth
$10,047,154.00
430,623.550 LINK
2.1767%
12
Coinstore
LINK-USDT$22.56
0.0068039 Eth
$8,753,944.00
374,937.800 LINK
1.8952%
13
Bitunix
LINK-USDT$22.50
0.0067902 Eth
$7,946,121.00
353,240.700 LINK
1.7856%
14
BTSE
LINK-USDT$22.49
0.0067871 Eth
$7,853,559.00
349,196.389 LINK
1.7651%
15
Binance
LINK-FDUSD$22.52
0.0067961 Eth
$7,688,925.00
328,181.780 LINK
1.6589%
16
Kraken
LINK-USD$22.49
0.0067871 Eth
$6,934,539.00
308,356.729 LINK
1.5587%
17
Biconomy.com
LINK-USDT$22.48
0.0067856 Eth
$6,870,145.00
293,878.754 LINK
1.4855%
18
BYDFi
LINK-USDT$22.51
0.0067893 Eth
$6,120,506.00
271,846.340 LINK
1.3741%
19
KuCoin
LINK-USDT$22.47
0.0067820 Eth
$5,646,668.00
251,278.397 LINK
1.2702%
20
Hotcoin
LINK-USDT$22.55
0.0067996 Eth
$5,086,346.00
225,512.310 LINK
1.1399%
21
LATOKEN
LINK-USDT$22.54
0.0067982 Eth
$4,910,119.00
217,847.324 LINK
1.1012%
22
LBank
LINK-USDT$22.63
0.0067994 Eth
$4,549,183.00
201,010.250 LINK
1.0161%
23
QMall
LINK-USDT$22.58
0.0068105 Eth
$4,145,523.00
177,616.483 LINK
0.8978%
24
FMCPAY
LINK-USDT$22.52
0.0067912 Eth
$3,611,390.00
154,537.690 LINK
0.7812%
25
Dex-Trade
LINK-USDT$22.67
0.0068199 Eth
$3,171,209.00
139,885.850 LINK
0.7071%
26
Coinbase Exchange
LINK-GBP$22.49
0.0067882 Eth
$2,560,165.00
113,846.770 LINK
0.5755%
27
ProBit Global
LINK-USDT$22.48
0.0067846 Eth
$2,495,443.00
111,031.272 LINK
0.5612%
28
Bitvavo
LINK-EUR$22.52
0.0067962 Eth
$2,456,013.00
109,064.496 LINK
0.5513%
29
Dcoin
LINK-USDT$22.42
0.0067675 Eth
$2,351,265.00
104,886.000 LINK
0.5302%
30
CoinEx
LINK-USDT$22.57
0.0067854 Eth
$2,223,727.00
95,624.407 LINK
0.4834%
31
PointPay
LINK-USDT$22.43
0.0067681 Eth
$1,639,552.00
70,373.324 LINK
0.3557%
32
Bitbank
LINK-JPY$22.55
0.0068077 Eth
$1,492,641.00
66,186.070 LINK
0.3346%
33
FMCPAY
LINK-ETH$22.62
0.0068179 Eth
$1,488,111.00
65,211.680 LINK
0.3296%
34
FMCPAY
LINK-BTC$22.52
0.0067909 Eth
$1,425,418.00
62,033.800 LINK
0.3136%
35
EXMO
LINK-USDT$22.52
0.0067975 Eth
$1,402,819.00
62,283.843 LINK
0.3148%
36
Bitstamp
LINK-USD$22.44
0.0067743 Eth
$1,344,277.00
59,905.404 LINK
0.3028%
37
WhiteBIT
LINK-BTC$22.65
0.0068169 Eth
$1,253,603.00
55,354.680 LINK
0.2798%
38
WhiteBIT
LINK-TRY$22.61
0.0068202 Eth
$1,193,024.00
52,771.590 LINK
0.2667%
39
Phemex
LINK-USDT$22.65
0.0068286 Eth
$1,153,914.00
50,940.860 LINK
0.2575%
40
Bitstamp
LINK-EUR$22.41
0.0067665 Eth
$1,070,769.00
47,771.927 LINK
0.2415%
41
Coinbase Exchange
LINK-EUR$22.51
0.0067938 Eth
$1,050,368.00
46,669.740 LINK
0.2359%
42
tanX
LINK-USDC$22.61
0.0068200 Eth
$1,017,384.00
43,347.050 LINK
0.2191%
43
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$22.67
0.0068393 Eth
$988,863.00
43,056.765 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2176%
44
Trubit
LINK-USDT$22.48
0.0067831 Eth
$945,626.00
40,472.010 LINK
0.2046%
45
Bybit
LINK-USDC$22.44
0.0067715 Eth
$931,709.00
40,112.000 LINK
0.2028%
46
EarnBIT
LINK-USDT$22.51
0.0067900 Eth
$836,369.00
35,916.090 LINK
0.1815%
47
BigONE
LINK-USDT$22.59
0.0068117 Eth
$836,241.00
37,019.890 LINK
0.1871%
48
itBit
LINK-USD$22.45
0.0067773 Eth
$830,903.00
37,011.274 LINK
0.1871%
49
BitStorage
LINK-USDT$22.47
0.0067843 Eth
$804,259.00
35,786.270 LINK
0.1809%
50
ProBit Global
LINK-BTC$22.50
0.0067878 Eth
$676,887.00
30,083.851 LINK
0.1521%
51
Binance
LINK-TRY$22.58
0.0068139 Eth
$571,238.00
24,390.780 LINK
0.1233%
52
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$22.73
0.0068572 Eth
$537,767.00
23,194.252 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1172%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.53
0.0068025 Eth
$498,005.00
22,188.059 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1122%
54
Koinpark
LINK-USDT$22.54
0.0067966 Eth
$496,956.00
22,043.198 LINK
0.1114%
55
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$22.81
0.0068831 Eth
$468,336.00
19,792.772 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1000%
56
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.52
0.0067992 Eth
$465,723.00
20,409.758 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1032%
57
HashKey Exchange
LINK-USD$22.68
0.0068288 Eth
$461,065.00
19,804.304 LINK
0.1001%
58
Coinbase Exchange
LINK-USDT$22.40
0.0067619 Eth
$445,363.00
19,877.883 LINK
0.1005%
59
Slex
LINK-ETH$22.52
0.0067953 Eth
$414,850.00
18,196.350 LINK
0.0920%
60
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.52
0.0067993 Eth
$397,012.00
415,023.021 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.0978%
61
GMO Japan
LINK-JPY$22.79
0.0068719 Eth
$362,491.00
15,906.800 LINK
0.0804%
62
BitMart
LINK-BTC$22.48
0.0067829 Eth
$356,596.00
15,863.160 LINK
0.0802%
63
WhiteBIT
LINK-EUR$22.56
0.0068029 Eth
$343,918.00
15,244.920 LINK
0.0771%
64
OKX
LINK-USDC$22.42
0.0067682 Eth
$286,420.00
12,262.936 LINK
0.0620%
65
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.52
0.0067988 Eth
$281,458.00
292,077.881 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.4764%
66
BitDelta
LINK-USDT$22.57
0.0068021 Eth
$277,260.00
11,835.000 LINK
0.0598%
67
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.47
0.0067842 Eth
$266,781.00
11,717.807 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0592%
68
Coinbase Exchange
LINK-BTC$22.45
0.0067774 Eth
$263,211.00
11,724.180 LINK
0.0593%
69
LATOKEN
LINK-BTC$22.48
0.0067856 Eth
$256,488.00
11,410.113 LINK
0.0577%
70
Gemini
LINK-USD$22.42
0.0067670 Eth
$249,628.00
11,136.236 LINK
0.0563%
71
Bitci TR
LINK-TRY$22.63
0.0068284 Eth
$238,417.00
10,124.871 LINK
0.0512%
72
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.38
0.0067566 Eth
$212,747.00
9,115.311 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0461%
73
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$22.54
0.0068036 Eth
$204,778.00
15,937.047 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0806%
74
PointPay
LINK-BTC$22.56
0.0068014 Eth
$202,044.00
8,786.160 LINK
0.0444%
75
Binance
LINK-BNB$22.62
0.0068226 Eth
$184,022.00
7,964.651 LINK
0.0403%
76
Hotcoin
LINK-BTC$22.44
0.0067739 Eth
$178,188.00
7,941.050 LINK
0.0401%
77
BitStorage
LINK-ETH$22.54
0.0067983 Eth
$164,825.00
7,314.010 LINK
0.0370%
78
BitMart
LINK-ETH$22.51
0.0067913 Eth
$152,244.00
6,764.160 LINK
0.0342%
79
BTCMarkets
LINK-AUD$22.70
0.0068293 Eth
$142,289.00
6,267.242 LINK
0.0317%
80
Binance US
LINK-USDT$22.62
0.0068149 Eth
$139,027.00
6,145.793 LINK
0.0311%
81
KuCoin
LINK-USDC$22.49
0.0067887 Eth
$118,551.00
5,270.362 LINK
0.0266%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.56
0.0068106 Eth
$114,314.00
5,008.473 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0253%
83
OKX
LINK-EUR$22.41
0.0067656 Eth
$114,281.00
4,957.001 LINK
0.0251%
84
Coinbase Exchange
LINK-ETH$22.55
0.0068001 Eth
$104,463.00
4,633.390 LINK
0.0234%
85
Kanga
LINK-PLN$22.68
0.0068477 Eth
$100,725.00
0.000 LINK
0.0000%
86
Bitso
LINK-USD$22.42
0.0067684 Eth
$97,012.00
4,326.913 LINK
0.0219%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$22.81
0.0068831 Eth
$82,223.00
84,643.606 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4279%
88
EXMO
LINK-BTC$22.28
0.0067253 Eth
$80,114.00
3,595.175 LINK
0.0182%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$22.68
0.0068448 Eth
$74,469.00
3,185.863 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0161%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.68
0.0068448 Eth
$69,772.00
3,095.133 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0156%
91
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$22.55
0.0068030 Eth
$66,755.00
2,913.054 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0147%
92
Hotcoin
LINK-ETH$22.50
0.0067890 Eth
$61,999.00
2,755.540 LINK
0.0139%
93
Foxbit
LINK-BRL$22.68
0.0068331 Eth
$61,780.00
2,579.114 LINK
0.0130%
94
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.51
0.0067942 Eth
$61,057.00
2,553.945 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0129%
95
Kraken
LINK-GBP$22.51
0.0067922 Eth
$46,815.00
2,080.158 LINK
0.0105%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$22.67
0.0068393 Eth
$43,764.00
1,895.783 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0096%
97
Mercado Bitcoin
LINK-BRL$22.65
0.0068353 Eth
$41,652.00
1,838.704 LINK
0.0093%
98
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$22.58
0.0068162 Eth
$21,693.00
945.655 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0048%
99
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$22.71
0.0068569 Eth
$15,586.28
687.701 0X5947BB275C521040051D82396192181B413227A3
0.0035%
100
Bitexen
LINK-TRY$22.67
0.0068104 Eth
$8,852.92
390.544 LINK
0.0020%

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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