ETH Price: $3,333.15 (-3.88%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,699 ( 0.042%)

Market

Price

$22.76 @ 0.006828 ETH (-6.88%)

Onchain Market Cap

$22,760,000,000.00

Circulating Supply Market Cap

$14,364,512,760.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
108.07264893731823616 LINK

Value
$2,459.73 ( ~0.737958539518499 Eth) [0.0000%]
0x8541dbe3d76e7c8f7ca6f7282dcaa549a92f3598
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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 20590.91% |ETH 0.0003846 1675.35%

Market

Volume (24H):$978,009,468.00
Market Capitalization:$14,364,512,760.00
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$22.78
0.0068326 Eth
$37,649,159.00
1,652,997.130 LINK
10.2725%
2
Coinbase Exchange
LINK-USD$22.78
0.0068336 Eth
$37,298,483.00
1,637,478.410 LINK
10.1761%
3
MEXC
LINK-USDT$22.77
0.0068412 Eth
$29,654,027.00
1,302,359.580 LINK
8.0935%
4
Bybit
LINK-USDT$22.79
0.0068383 Eth
$28,715,474.00
1,218,190.464 LINK
7.5704%
5
Slex
LINK-USDT$22.79
0.0068454 Eth
$23,755,712.00
1,008,400.530 LINK
6.2667%
6
OKX
LINK-USDT$22.78
0.0068348 Eth
$18,052,721.00
769,708.568 LINK
4.7834%
7
DigiFinex
LINK-USDT$22.77
0.0068319 Eth
$13,108,515.00
575,696.730 LINK
3.5777%
8
HTX
LINK-USDT$22.77
0.0068315 Eth
$11,323,453.00
482,026.412 LINK
2.9956%
9
FameEX
LINK-USDT$22.78
0.0068426 Eth
$10,233,113.00
436,565.385 LINK
2.7130%
10
Azbit
LINK-USDT$22.80
0.0068472 Eth
$10,185,128.00
434,534.586 LINK
2.7004%
11
XT.COM
LINK-USDT$22.76
0.0068382 Eth
$10,178,307.00
434,281.660 LINK
2.6988%
12
Coinstore
LINK-USDT$22.78
0.0068426 Eth
$8,952,405.00
381,839.570 LINK
2.3729%
13
BTSE
LINK-USDT$22.79
0.0068359 Eth
$8,159,917.00
358,088.473 LINK
2.2253%
14
Bitunix
LINK-USDT$22.79
0.0068373 Eth
$8,135,796.00
357,020.620 LINK
2.2187%
15
Binance
LINK-FDUSD$22.75
0.0068424 Eth
$8,077,684.00
343,801.640 LINK
2.1366%
16
Biconomy.com
LINK-USDT$22.78
0.0068436 Eth
$6,965,452.00
295,980.334 LINK
1.8394%
17
Kraken
LINK-USD$22.78
0.0068341 Eth
$6,688,344.00
293,609.710 LINK
1.8246%
18
BYDFi
LINK-USDT$22.78
0.0068340 Eth
$6,273,612.00
275,386.740 LINK
1.7114%
19
KuCoin
LINK-USDT$22.77
0.0068332 Eth
$5,442,152.00
238,961.022 LINK
1.4850%
20
Hotcoin
LINK-USDT$22.76
0.0068410 Eth
$5,178,794.00
227,542.410 LINK
1.4141%
21
LATOKEN
LINK-USDT$22.80
0.0068407 Eth
$4,978,042.00
218,317.245 LINK
1.3567%
22
LBank
LINK-USDT$22.76
0.0068293 Eth
$4,568,503.00
200,714.200 LINK
1.2473%
23
Binance
LINK-USDC$22.75
0.0068457 Eth
$3,726,790.00
159,739.170 LINK
0.9927%
24
Dex-Trade
LINK-USDT$22.82
0.0068579 Eth
$3,260,956.00
142,875.460 LINK
0.8879%
25
Coinbase Exchange
LINK-GBP$22.81
0.0068500 Eth
$2,766,673.00
121,316.630 LINK
0.7539%
26
Bitvavo
LINK-EUR$22.77
0.0068447 Eth
$2,431,641.00
106,770.996 LINK
0.6635%
27
Dcoin
LINK-USDT$22.82
0.0068510 Eth
$2,394,510.00
104,930.000 LINK
0.6521%
28
ProBit Global
LINK-USDT$22.79
0.0068484 Eth
$2,252,845.00
98,839.581 LINK
0.6142%
29
CoinEx
LINK-USDT$22.77
0.0068550 Eth
$2,149,912.00
92,123.111 LINK
0.5725%
30
PointPay
LINK-USDT$22.79
0.0068358 Eth
$1,666,988.00
71,220.035 LINK
0.4426%
31
Bitbank
LINK-JPY$22.81
0.0068442 Eth
$1,517,019.00
66,496.930 LINK
0.4132%
32
EXMO
LINK-USDT$22.78
0.0068352 Eth
$1,429,650.00
62,757.014 LINK
0.3900%
33
Bitstamp
LINK-USD$22.75
0.0068265 Eth
$1,345,724.00
59,152.691 LINK
0.3676%
34
WhiteBIT
LINK-BTC$22.77
0.0068366 Eth
$1,245,419.00
54,684.790 LINK
0.3398%
35
Phemex
LINK-USDT$22.78
0.0068340 Eth
$1,226,862.00
53,854.400 LINK
0.3347%
36
Coinbase Exchange
LINK-EUR$22.81
0.0068510 Eth
$1,220,580.00
53,514.220 LINK
0.3326%
37
WhiteBIT
LINK-TRY$22.89
0.0068797 Eth
$1,216,751.00
53,150.710 LINK
0.3303%
38
tanX
LINK-USDC$22.80
0.0068456 Eth
$1,096,193.00
46,431.950 LINK
0.2886%
39
Bitstamp
LINK-EUR$22.77
0.0068328 Eth
$1,061,683.00
46,624.698 LINK
0.2897%
40
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$22.81
0.0068461 Eth
$981,133.00
42,444.391 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2638%
41
Trubit
LINK-USDT$22.75
0.0068330 Eth
$958,444.00
40,733.030 LINK
0.2531%
42
Bybit
LINK-USDC$22.78
0.0068353 Eth
$929,507.00
39,826.803 LINK
0.2475%
43
EarnBIT
LINK-USDT$22.82
0.0068459 Eth
$882,164.00
37,569.331 LINK
0.2335%
44
BigONE
LINK-USDT$22.74
0.0068448 Eth
$853,341.00
37,531.310 LINK
0.2332%
45
BitStorage
LINK-USDT$22.81
0.0068544 Eth
$823,801.00
36,113.840 LINK
0.2244%
46
itBit
LINK-USD$22.81
0.0068430 Eth
$802,307.00
35,173.469 LINK
0.2186%
47
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$22.70
0.0068115 Eth
$550,301.00
23,698.919 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1473%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.85
0.0068591 Eth
$512,667.00
22,149.010 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1376%
49
Koinpark
LINK-USDT$22.79
0.0068412 Eth
$511,114.00
22,427.199 LINK
0.1394%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.76
0.0068328 Eth
$505,555.00
22,223.378 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1381%
51
Binance
LINK-EUR$22.80
0.0068547 Eth
$473,282.00
20,234.360 LINK
0.1257%
52
HashKey Exchange
LINK-USD$22.81
0.0068439 Eth
$461,280.00
19,810.752 LINK
0.1231%
53
Coinbase Exchange
LINK-USDT$22.78
0.0068353 Eth
$455,048.00
19,974.684 LINK
0.1241%
54
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$22.80
0.0068451 Eth
$442,894.00
18,743.024 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1165%
55
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.75
0.0068290 Eth
$433,242.00
451,191.352 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.8039%
56
Slex
LINK-ETH$22.76
0.0068407 Eth
$407,025.00
17,724.510 LINK
0.1101%
57
GMO Japan
LINK-JPY$22.80
0.0068463 Eth
$380,637.00
16,691.300 LINK
0.1037%
58
BitMart
LINK-BTC$22.78
0.0068369 Eth
$361,534.00
15,873.760 LINK
0.0986%
59
WhiteBIT
LINK-EUR$22.80
0.0068394 Eth
$353,464.00
15,503.490 LINK
0.0963%
60
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.85
0.0068591 Eth
$294,663.00
303,352.703 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.8852%
61
OKX
LINK-USDC$22.83
0.0068493 Eth
$287,675.00
12,248.570 LINK
0.0761%
62
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.77
0.0068353 Eth
$283,649.00
12,333.749 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0766%
63
BitDelta
LINK-USDT$22.75
0.0068434 Eth
$273,319.00
11,596.000 LINK
0.0721%
64
Gemini
LINK-USD$22.76
0.0068291 Eth
$267,405.00
11,748.684 LINK
0.0730%
65
Coinbase Exchange
LINK-BTC$22.79
0.0068365 Eth
$266,639.00
11,700.710 LINK
0.0727%
66
LATOKEN
LINK-BTC$22.77
0.0068424 Eth
$263,416.00
11,566.794 LINK
0.0719%
67
Bitkub
LINK-THB$22.79
0.0068354 Eth
$254,497.00
11,165.079 LINK
0.0694%
68
Bitci TR
LINK-TRY$22.80
0.0068406 Eth
$239,721.00
10,100.641 LINK
0.0628%
69
Coinbase Exchange
LINK-ETH$22.79
0.0068359 Eth
$227,613.00
9,989.170 LINK
0.0621%
70
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.78
0.0068455 Eth
$220,575.00
9,351.208 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0581%
71
Binance
LINK-BRL$22.90
0.0068839 Eth
$214,278.00
9,021.830 LINK
0.0561%
72
PointPay
LINK-BTC$22.79
0.0068359 Eth
$202,857.00
8,791.462 LINK
0.0546%
73
Binance
LINK-BNB$22.78
0.0068357 Eth
$186,235.00
8,003.079 LINK
0.0497%
74
Hotcoin
LINK-BTC$22.78
0.0068383 Eth
$181,714.00
7,976.830 LINK
0.0496%
75
BitStorage
LINK-ETH$22.79
0.0068360 Eth
$170,870.00
7,498.890 LINK
0.0466%
76
BitMart
LINK-ETH$22.77
0.0068322 Eth
$158,919.00
6,979.100 LINK
0.0434%
77
BTCMarkets
LINK-AUD$22.97
0.0069016 Eth
$144,074.00
6,272.242 LINK
0.0390%
78
KuCoin
LINK-USDC$22.80
0.0068410 Eth
$121,871.00
5,345.156 LINK
0.0332%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.78
0.0068376 Eth
$119,522.00
5,204.561 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0323%
80
Binance US
LINK-USDT$22.76
0.0068400 Eth
$114,736.00
5,040.894 LINK
0.0313%
81
OKX
LINK-EUR$22.68
0.0068043 Eth
$114,431.00
4,962.025 LINK
0.0308%
82
Kanga
LINK-PLN$22.84
0.0068600 Eth
$104,842.00
0.000 LINK
0.0000%
83
Bitso
LINK-USD$22.80
0.0068444 Eth
$94,237.00
4,133.533 LINK
0.0257%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$22.81
0.0068461 Eth
$79,434.00
82,149.263 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5105%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$22.85
0.0068591 Eth
$75,595.00
3,214.416 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0200%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.70
0.0068135 Eth
$74,100.00
3,260.009 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0203%
87
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$22.85
0.0068546 Eth
$65,743.00
2,851.367 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0177%
88
Hotcoin
LINK-ETH$22.77
0.0068360 Eth
$63,246.00
2,777.580 LINK
0.0173%
89
KuCoin
LINK-BTC$22.83
0.0068497 Eth
$58,390.00
2,557.669 LINK
0.0159%
90
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$22.80
0.0068436 Eth
$43,489.00
1,876.307 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0117%
91
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$22.80
0.0068445 Eth
$21,958.00
944.661 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0059%
92
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$22.78
0.0068343 Eth
$18,558.13
25.288 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$22.75
0.0068332 Eth
$14,372.07
632.267 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0039%
94
Gemini
LINK-BTC$22.68
0.0068038 Eth
$14,302.07
630.706 LINK
0.0039%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$22.78
0.0068377 Eth
$12,123.62
523.421 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0033%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$22.81
0.0068507 Eth
$11,737.24
500.615 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0031%
97
KuCoin
LINK-KCS$22.86
0.0068598 Eth
$10,302.71
450.632 LINK
0.0028%
98
Bitstamp
LINK-BTC$22.84
0.0068547 Eth
$10,251.06
448.743 LINK
0.0028%
99
Bitexen
LINK-TRY$22.70
0.0068103 Eth
$8,864.48
390.544 LINK
0.0024%
100
Ace
LINK-USDT$22.80
0.0068522 Eth
$3,845.03
163.830 LINK
0.0010%

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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