ETH Price: $2,676.87 (-2.87%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

736,326 ( 0.013%)

Market

Price

$17.89 @ 0.006683 ETH (-8.88%)

Onchain Market Cap

$17,890,000,000.00

Circulating Supply Market Cap

$11,411,126,953.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.13211592430206369 LINK

Value
$2.36 ( ~0.000881626877980257 Eth) [0.0000%]
0x3e7b8d12d4de6cb284a7d60bf92b462d2a6d6a2f
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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 16163.64% |ETH 0.0003846 1637.65%

Market

Volume (24H):$670,535,954.00
Market Capitalization:$11,411,126,953.00
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
Binance
LINK-USDT$17.81
0.0066524 Eth
$77,149,525.00
4,144,976.870 LINK
17.0804%
2
MEXC
LINK-USDT$17.90
0.0066545 Eth
$43,046,245.00
2,405,482.430 LINK
9.9124%
3
Bybit
LINK-USDT$17.78
0.0066444 Eth
$29,966,808.00
1,603,415.414 LINK
6.6073%
4
Coinbase Exchange
LINK-USD$17.82
0.0066578 Eth
$29,925,218.00
1,679,493.680 LINK
6.9208%
5
HTX
LINK-USDT$17.81
0.0066561 Eth
$19,302,930.00
1,035,646.839 LINK
4.2676%
6
MEXC
LINK-EUR$17.93
0.0066818 Eth
$13,398,711.00
747,314.450 LINK
3.0795%
7
MEXC
LINK-USDC$17.81
0.0066557 Eth
$12,680,216.00
711,983.710 LINK
2.9339%
8
Slex
LINK-USDT$17.79
0.0066502 Eth
$11,756,891.00
630,792.630 LINK
2.5993%
9
Bitget
LINK-USDT$17.84
0.0066637 Eth
$11,527,683.00
617,110.069 LINK
2.5430%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.74
0.0066328 Eth
$10,996,546.00
598,418.391 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.4659%
11
Kraken
LINK-USD$17.82
0.0066582 Eth
$10,549,836.00
592,052.141 LINK
2.4397%
12
WhiteBIT
LINK-USDT$17.74
0.0066341 Eth
$10,081,257.00
568,152.980 LINK
2.3412%
13
DigiFinex
LINK-USDT$17.84
0.0066658 Eth
$9,043,943.00
506,914.880 LINK
2.0889%
14
OKX
LINK-USDT$17.79
0.0066470 Eth
$9,012,129.00
485,059.157 LINK
1.9988%
15
Gate.io
LINK-USDT$17.81
0.0066543 Eth
$8,714,489.00
468,788.500 LINK
1.9318%
16
XT.COM
LINK-USDT$17.79
0.0066490 Eth
$7,692,248.00
413,355.300 LINK
1.7033%
17
Coinstore
LINK-USDT$17.89
0.0066695 Eth
$6,589,138.00
354,105.960 LINK
1.4592%
18
KuCoin
LINK-USDT$17.81
0.0066547 Eth
$6,573,079.00
369,067.825 LINK
1.5208%
19
CoinW
LINK-USDT$17.90
0.0066714 Eth
$5,623,863.00
314,180.890 LINK
1.2947%
20
Binance
LINK-USDC$17.96
0.0066971 Eth
$5,416,602.00
289,884.280 LINK
1.1945%
21
Binance
LINK-FDUSD$17.89
0.0066736 Eth
$5,410,400.00
292,361.700 LINK
1.2047%
22
BTSE
LINK-USDT$17.88
0.0066647 Eth
$4,754,541.00
265,890.228 LINK
1.0957%
23
Azbit
LINK-USDT$17.77
0.0066421 Eth
$4,572,917.00
245,836.145 LINK
1.0130%
24
Bitunix
LINK-USDT$17.77
0.0066409 Eth
$4,544,553.00
255,737.310 LINK
1.0538%
25
BYDFi
LINK-USDT$17.76
0.0066337 Eth
$4,081,265.00
229,752.790 LINK
0.9468%
26
Hotcoin
LINK-USDT$17.77
0.0066416 Eth
$3,911,668.00
220,182.520 LINK
0.9073%
27
LATOKEN
LINK-USDT$17.78
0.0066456 Eth
$3,622,488.00
203,690.316 LINK
0.8394%
28
Coinbase Exchange
LINK-GBP$17.75
0.0066332 Eth
$3,472,276.00
195,597.230 LINK
0.8060%
29
QMall
LINK-USDT$17.87
0.0066647 Eth
$3,013,866.00
162,229.910 LINK
0.6685%
30
FMCPAY
LINK-USDT$17.75
0.0066318 Eth
$2,926,792.00
157,477.319 LINK
0.6489%
31
Coinbase Exchange
LINK-EUR$17.83
0.0066614 Eth
$2,783,988.00
156,159.840 LINK
0.6435%
32
Bitvavo
LINK-EUR$17.90
0.0066711 Eth
$2,339,925.00
130,730.625 LINK
0.5387%
33
Dex-Trade
LINK-USDT$17.88
0.0066717 Eth
$2,279,539.00
127,495.950 LINK
0.5254%
34
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.91
0.0066930 Eth
$2,192,680.00
119,538.231 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4926%
35
CoinEx
LINK-USDT$17.78
0.0066424 Eth
$1,820,343.00
98,913.381 LINK
0.4076%
36
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.89
0.0066848 Eth
$1,582,221.00
85,043.031 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3504%
37
Biconomy.com
LINK-USDT$17.77
0.0066431 Eth
$1,501,272.00
80,638.520 LINK
0.3323%
38
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.75
0.0066332 Eth
$1,499,821.00
80,559.461 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3320%
39
FMCPAY
LINK-ETH$17.80
0.0066507 Eth
$1,226,707.00
66,678.240 LINK
0.2748%
40
FMCPAY
LINK-BTC$17.85
0.0066525 Eth
$1,207,542.00
64,998.800 LINK
0.2678%
41
PointPay
LINK-USDT$17.77
0.0066370 Eth
$1,166,906.00
62,767.860 LINK
0.2587%
42
Gemini
LINK-USD$17.80
0.0066523 Eth
$1,008,314.00
56,631.119 LINK
0.2334%
43
Binance
LINK-ETH$17.77
0.0066405 Eth
$868,860.00
47,665.180 LINK
0.1964%
44
tanX
LINK-USDC$17.80
0.0066511 Eth
$805,928.00
43,359.210 LINK
0.1787%
45
EXMO
LINK-USDT$17.80
0.0066514 Eth
$786,587.00
44,187.700 LINK
0.1821%
46
Trubit
LINK-USDT$17.79
0.0066482 Eth
$766,567.00
41,188.910 LINK
0.1697%
47
WhiteBIT
LINK-BTC$17.89
0.0066678 Eth
$755,167.00
42,211.530 LINK
0.1739%
48
Phemex
LINK-USDT$17.89
0.0066777 Eth
$741,883.00
41,459.580 LINK
0.1708%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.77
0.0066425 Eth
$646,992.00
34,652.743 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1428%
50
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.85
0.0066748 Eth
$610,949.00
640,201.676 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.6381%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.85
0.0066748 Eth
$596,879.00
32,273.730 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1330%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.89
0.0066876 Eth
$594,102.00
33,055.993 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1362%
53
BitStorage
LINK-USDT$17.79
0.0066493 Eth
$587,654.00
33,024.870 LINK
0.1361%
54
Bitbank
LINK-JPY$17.85
0.0066699 Eth
$568,198.00
31,833.051 LINK
0.1312%
55
LATOKEN
LINK-BTC$17.78
0.0066452 Eth
$559,905.00
31,496.047 LINK
0.1298%
56
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.91
0.0066930 Eth
$553,063.00
578,633.128 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
2.3844%
57
BigONE
LINK-USDT$18.00
0.0067110 Eth
$545,984.00
30,339.100 LINK
0.1250%
58
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.92
0.0066983 Eth
$530,103.00
56,930.030 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2346%
59
Binance
LINK-EUR$17.87
0.0066698 Eth
$503,536.00
27,384.570 LINK
0.1128%
60
Kraken
LINK-XBT$17.78
0.0066425 Eth
$446,107.00
25,094.496 LINK
0.1034%
61
QMall
LINK-USDC$17.82
0.0066432 Eth
$416,848.00
22,397.141 LINK
0.0923%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.88
0.0066838 Eth
$398,906.00
21,559.683 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0888%
63
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.95
0.0067075 Eth
$365,527.00
19,586.298 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0807%
64
Binance
LINK-TRY$17.91
0.0066814 Eth
$364,396.00
19,598.760 LINK
0.0808%
65
Coinbase Exchange
LINK-USDT$17.77
0.0066316 Eth
$321,586.00
18,097.925 LINK
0.0746%
66
OKX
LINK-USDC$17.82
0.0066587 Eth
$315,378.00
16,880.339 LINK
0.0696%
67
BitDelta
LINK-USDT$17.76
0.0066337 Eth
$298,706.00
16,073.000 LINK
0.0662%
68
itBit
LINK-USD$17.82
0.0066585 Eth
$277,099.00
15,549.864 LINK
0.0641%
69
Binance US
LINK-USDT$17.79
0.0066490 Eth
$240,665.00
13,531.497 LINK
0.0558%
70
BitMart
LINK-BTC$17.78
0.0066468 Eth
$236,402.00
13,293.240 LINK
0.0548%
71
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.81
0.0066567 Eth
$227,828.00
12,222.436 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0504%
72
Bitci TR
LINK-TRY$17.80
0.0066435 Eth
$191,412.00
10,229.280 LINK
0.0422%
73
WhiteBIT
LINK-EUR$17.89
0.0066876 Eth
$190,585.00
10,652.820 LINK
0.0439%
74
BitStorage
LINK-ETH$17.78
0.0066425 Eth
$186,280.00
10,477.550 LINK
0.0432%
75
Slex
LINK-ETH$17.76
0.0066390 Eth
$177,816.00
9,736.490 LINK
0.0401%
76
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.77
0.0066418 Eth
$160,204.00
8,594.336 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0354%
77
CoinTR
LINK-TRY$17.77
0.0066423 Eth
$157,950.00
8,494.190 LINK
0.0350%
78
Coinbase Exchange
LINK-BTC$17.76
0.0066380 Eth
$146,217.00
8,231.880 LINK
0.0339%
79
Hotcoin
LINK-BTC$17.79
0.0066495 Eth
$140,658.00
7,904.430 LINK
0.0326%
80
BYDFi
LINK-USDC$17.75
0.0066293 Eth
$128,911.00
7,261.840 LINK
0.0299%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.82
0.0066597 Eth
$125,329.00
6,750.386 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0278%
82
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.81
0.0066564 Eth
$114,243.00
120,242.464 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4955%
83
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.86
0.0066724 Eth
$110,424.00
6,020.161 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0248%
84
Coinbase Exchange
LINK-ETH$17.77
0.0066417 Eth
$108,786.00
6,121.120 LINK
0.0252%
85
Bitkub
LINK-THB$18.02
0.0067045 Eth
$99,118.00
5,500.280 LINK
0.0227%
86
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.91
0.0066930 Eth
$96,095.00
100,576.571 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4145%
87
KuCoin
LINK-USDC$17.75
0.0066328 Eth
$84,718.00
4,772.514 LINK
0.0197%
88
Bitso
LINK-USD$17.77
0.0066395 Eth
$81,553.00
4,590.342 LINK
0.0189%
89
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.88
0.0066804 Eth
$76,072.00
4,112.885 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0169%
90
BTCMarkets
LINK-AUD$17.79
0.0066494 Eth
$73,551.00
4,133.772 LINK
0.0170%
91
Binance US
LINK-BTC$17.87
0.0066815 Eth
$70,194.00
3,927.492 LINK
0.0162%
92
BitMart
LINK-ETH$17.79
0.0066482 Eth
$66,008.00
3,710.920 LINK
0.0153%
93
Kanga
LINK-PLN$17.93
0.0067050 Eth
$58,325.00
0.000 LINK
0.0000%
94
Tokenize
LINK-ETH$17.82
0.0066397 Eth
$56,251.00
3,157.305 LINK
0.0130%
95
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.90
0.0066881 Eth
$53,281.00
2,890.722 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0119%
96
Binance
LINK-BNB$17.98
0.0067062 Eth
$47,607.00
2,581.404 LINK
0.0106%
97
KuCoin
LINK-BTC$17.77
0.0066382 Eth
$40,714.00
2,291.720 LINK
0.0094%
98
Hotcoin
LINK-ETH$17.80
0.0066533 Eth
$39,215.00
2,202.480 LINK
0.0091%
99
Mercado Bitcoin
LINK-BRL$17.92
0.0066987 Eth
$36,108.00
2,014.907 LINK
0.0083%
100
Dex-Trade
LINK-ETH$17.79
0.0066465 Eth
$24,105.00
1,355.000 LINK
0.0056%

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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