ETH Price: $3,191.32 (+4.87%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,925 ( 0.015%)

Market

Price

$19.82 @ 0.006211 ETH (+9.15%)

Onchain Market Cap

$19,820,000,000.00

Circulating Supply Market Cap

$12,505,911,909.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.000151094267314176 LINK

Value
$0.00 ( ~0 Eth) [0.0000%]
0x83d83b8ce0fdf18d81eabc9288f1943741bc7c8f
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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 17918.18% |ETH 0.0003846 1514.92%

Market

Volume (24H):$913,161,392.00
Market Capitalization:$12,505,911,909.00
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$19.85
0.0062231 Eth
$131,128,852.00
6,903,064.340 LINK
23.3527%
2
Coinbase Exchange
LINK-USD$19.86
0.0062270 Eth
$45,688,627.00
2,300,882.680 LINK
7.7838%
3
Bitget
LINK-USDT$19.85
0.0062231 Eth
$26,275,377.00
1,385,743.253 LINK
4.6879%
4
P2B
LINK-USDT$19.85
0.0062262 Eth
$25,324,530.00
1,275,722.530 LINK
4.3157%
5
Bybit
LINK-USDT$19.86
0.0062264 Eth
$21,008,326.00
1,110,937.787 LINK
3.7582%
6
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.90
0.0062352 Eth
$20,511,071.00
1,041,448.742 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.5232%
7
MEXC
LINK-USDT$19.85
0.0062235 Eth
$19,245,830.00
969,415.080 LINK
3.2795%
8
Slex
LINK-USDT$19.80
0.0062133 Eth
$18,880,111.00
982,681.420 LINK
3.3244%
9
DigiFinex
LINK-USDT$19.85
0.0062221 Eth
$16,638,191.00
838,281.410 LINK
2.8359%
10
Gate.io
LINK-USDT$19.85
0.0062221 Eth
$15,660,129.00
813,226.449 LINK
2.7511%
11
OKX
LINK-USDT$19.86
0.0062252 Eth
$14,086,968.00
735,746.958 LINK
2.4890%
12
XT.COM
LINK-USDT$19.87
0.0062290 Eth
$13,084,005.00
688,806.090 LINK
2.3302%
13
Azbit
LINK-USDT$19.83
0.0062240 Eth
$12,635,008.00
667,024.887 LINK
2.2565%
14
HTX
LINK-USDT$19.85
0.0062243 Eth
$12,525,107.00
653,775.638 LINK
2.2117%
15
Coinstore
LINK-USDT$19.84
0.0062110 Eth
$11,232,419.00
590,319.300 LINK
1.9970%
16
KuCoin
LINK-USDT$19.86
0.0062254 Eth
$11,078,836.00
557,873.963 LINK
1.8873%
17
CoinW
LINK-USDT$19.85
0.0062217 Eth
$10,622,348.00
535,069.520 LINK
1.8101%
18
Bitunix
LINK-USDT$19.85
0.0062215 Eth
$10,112,204.00
509,403.310 LINK
1.7233%
19
Binance
LINK-FDUSD$19.85
0.0062331 Eth
$9,123,253.00
477,460.410 LINK
1.6152%
20
Hotcoin
LINK-USDT$19.85
0.0062208 Eth
$7,872,843.00
396,631.160 LINK
1.3418%
21
BYDFi
LINK-USDT$19.84
0.0062254 Eth
$7,744,977.00
390,412.260 LINK
1.3207%
22
LBank
LINK-USDT$19.85
0.0062231 Eth
$6,692,933.00
337,157.190 LINK
1.1406%
23
LATOKEN
LINK-USDT$19.85
0.0062249 Eth
$6,459,963.00
325,369.114 LINK
1.1007%
24
Binance
LINK-USDC$19.87
0.0062286 Eth
$5,845,221.00
307,367.370 LINK
1.0398%
25
QMall
LINK-USDT$19.84
0.0062172 Eth
$5,396,989.00
284,127.955 LINK
0.9612%
26
Kraken
LINK-USD$19.86
0.0062254 Eth
$4,538,850.00
228,553.570 LINK
0.7732%
27
Dex-Trade
LINK-USDT$19.87
0.0062324 Eth
$4,182,493.00
210,481.010 LINK
0.7120%
28
BTSE
LINK-USDT$19.85
0.0062252 Eth
$4,004,351.00
201,750.414 LINK
0.6825%
29
Binance
LINK-BTC$19.80
0.0062128 Eth
$2,963,271.00
151,777.630 LINK
0.5135%
30
FMCPAY
LINK-USDT$19.84
0.0062218 Eth
$2,666,387.00
138,593.248 LINK
0.4689%
31
PointPay
LINK-USDT$19.86
0.0062290 Eth
$2,193,163.00
115,318.079 LINK
0.3901%
32
Coinbase Exchange
LINK-GBP$19.86
0.0062273 Eth
$2,124,092.00
106,943.750 LINK
0.3618%
33
Coinbase Exchange
LINK-EUR$19.85
0.0062234 Eth
$2,088,956.00
105,240.640 LINK
0.3560%
34
CoinEx
LINK-USDT$19.80
0.0062133 Eth
$2,077,308.00
109,761.034 LINK
0.3713%
35
EXMO
LINK-USDT$19.85
0.0062249 Eth
$1,987,109.00
100,107.799 LINK
0.3387%
36
Biconomy.com
LINK-USDT$19.84
0.0062175 Eth
$1,975,109.00
102,913.744 LINK
0.3482%
37
AscendEX (BitMax)
LINK-USDT$19.85
0.0062212 Eth
$1,823,287.00
91,875.800 LINK
0.3108%
38
Bitvavo
LINK-EUR$19.85
0.0062253 Eth
$1,551,070.00
78,136.180 LINK
0.2643%
39
Phemex
LINK-USDT$19.85
0.0062231 Eth
$1,506,237.00
75,877.670 LINK
0.2567%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.87
0.0062346 Eth
$1,415,116.00
71,971.702 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2435%
41
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.70
0.0061803 Eth
$1,392,233.00
71,586.716 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2422%
42
BigONE
LINK-USDT$19.90
0.0062394 Eth
$1,259,726.00
63,293.490 LINK
0.2141%
43
Bitstamp
LINK-EUR$19.86
0.0062259 Eth
$1,226,995.00
61,781.972 LINK
0.2090%
44
FMCPAY
LINK-ETH$19.84
0.0062229 Eth
$1,213,541.00
61,783.360 LINK
0.2090%
45
FMCPAY
LINK-BTC$19.84
0.0062221 Eth
$1,163,102.00
59,166.600 LINK
0.2002%
46
BitStorage
LINK-USDT$19.85
0.0062235 Eth
$1,030,142.00
51,888.380 LINK
0.1755%
47
Tokpie
LINK-USDT$19.95
0.0062595 Eth
$979,630.00
49,112.087 LINK
0.1661%
48
Binance
LINK-ETH$19.83
0.0062164 Eth
$967,584.00
49,309.690 LINK
0.1668%
49
Bitstamp
LINK-USD$19.85
0.0062227 Eth
$950,098.00
47,863.877 LINK
0.1619%
50
tanX
LINK-USDC$19.86
0.0062292 Eth
$941,774.00
48,533.510 LINK
0.1642%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.86
0.0062335 Eth
$933,570.00
47,517.766 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1607%
52
Gemini
LINK-USD$19.88
0.0062328 Eth
$824,586.00
41,473.743 LINK
0.1403%
53
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.81
0.0062091 Eth
$815,827.00
779,098.553 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.6356%
54
Trubit
LINK-USDT$19.85
0.0062243 Eth
$784,193.00
40,905.480 LINK
0.1384%
55
Coinbase Exchange
LINK-USDT$19.80
0.0062102 Eth
$739,166.00
37,326.307 LINK
0.1263%
56
EarnBIT
LINK-USDT$19.83
0.0062195 Eth
$666,009.00
34,792.290 LINK
0.1177%
57
Bitbank
LINK-JPY$19.86
0.0062256 Eth
$535,541.00
26,965.891 LINK
0.0912%
58
Binance
LINK-EUR$19.90
0.0062317 Eth
$522,459.00
27,586.960 LINK
0.0933%
59
Bybit
LINK-USDC$19.84
0.0062185 Eth
$514,146.00
27,094.071 LINK
0.0917%
60
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.83
0.0062223 Eth
$495,899.00
25,648.694 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0868%
61
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.77
0.0061931 Eth
$489,283.00
26,679.427 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0903%
62
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.64
0.0061580 Eth
$488,840.00
25,057.558 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0848%
63
QMall
LINK-USDC$19.81
0.0062203 Eth
$479,514.00
25,175.282 LINK
0.0852%
64
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.75
0.0061978 Eth
$464,206.00
445,519.847 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.5072%
65
GMO Japan
LINK-JPY$19.82
0.0062139 Eth
$428,589.00
21,622.300 LINK
0.0731%
66
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.91
0.0062395 Eth
$421,011.00
21,420.507 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0725%
67
Binance
LINK-TRY$19.87
0.0062309 Eth
$409,499.00
21,362.780 LINK
0.0723%
68
OKX
LINK-USDC$19.85
0.0062216 Eth
$344,237.00
18,108.583 LINK
0.0613%
69
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.86
0.0062207 Eth
$340,499.00
25,721.827 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0870%
70
Coinbase Exchange
LINK-BTC$19.84
0.0062239 Eth
$317,444.00
15,997.010 LINK
0.0541%
71
Hotcoin
LINK-BTC$19.78
0.0062064 Eth
$303,600.00
15,349.950 LINK
0.0519%
72
BYDFi
LINK-USDC$19.79
0.0062129 Eth
$282,425.00
14,271.690 LINK
0.0483%
73
BitMart
LINK-BTC$19.86
0.0062256 Eth
$273,234.00
13,758.220 LINK
0.0465%
74
BitDelta
LINK-USDT$19.85
0.0062208 Eth
$272,432.00
14,303.000 LINK
0.0484%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.94
0.0062594 Eth
$266,271.00
13,490.260 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0456%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$19.76
0.0062011 Eth
$220,149.00
11,596.017 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0392%
77
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$19.90
0.0062418 Eth
$212,955.00
10,872.834 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0368%
78
BitStorage
LINK-ETH$19.83
0.0062231 Eth
$175,203.00
8,834.190 LINK
0.0299%
79
Slex
LINK-ETH$19.85
0.0062167 Eth
$174,858.00
8,899.690 LINK
0.0301%
80
Coinbase Exchange
LINK-ETH$19.83
0.0062152 Eth
$168,622.00
8,504.860 LINK
0.0288%
81
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.73
0.0061912 Eth
$167,584.00
8,438.466 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0285%
82
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.85
0.0062249 Eth
$165,272.00
8,710.987 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0295%
83
LATOKEN
LINK-BTC$19.86
0.0062281 Eth
$148,676.00
7,486.176 LINK
0.0253%
84
Kraken
LINK-GBP$19.87
0.0062287 Eth
$142,937.00
7,193.734 LINK
0.0243%
85
Binance US
LINK-USDT$19.79
0.0062073 Eth
$139,461.00
7,046.644 LINK
0.0238%
86
Bitso
LINK-USD$19.78
0.0062019 Eth
$133,145.00
6,729.841 LINK
0.0228%
87
KuCoin
LINK-USDC$19.77
0.0061985 Eth
$114,600.00
5,795.657 LINK
0.0196%
88
PointPay
LINK-BTC$19.86
0.0062282 Eth
$109,250.00
5,586.891 LINK
0.0189%
89
Mercado Bitcoin
LINK-BRL$19.92
0.0062444 Eth
$105,956.00
5,319.176 LINK
0.0180%
90
Hotcoin
LINK-ETH$19.85
0.0062248 Eth
$100,187.00
5,048.090 LINK
0.0171%
91
Binance
LINK-BRL$19.92
0.0062390 Eth
$93,286.00
4,853.650 LINK
0.0164%
92
BitMart
LINK-ETH$19.86
0.0062257 Eth
$89,125.00
4,487.660 LINK
0.0152%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.83
0.0062177 Eth
$83,732.00
4,223.030 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0143%
94
Bitkub
LINK-THB$19.75
0.0061903 Eth
$83,575.00
4,232.404 LINK
0.0143%
95
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.80
0.0062124 Eth
$77,856.00
74,232.947 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2511%
96
Binance
LINK-BNB$19.86
0.0062258 Eth
$70,550.00
3,635.110 LINK
0.0123%
97
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$19.71
0.0061836 Eth
$68,876.00
3,534.118 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0120%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.82
0.0062207 Eth
$64,489.00
3,283.136 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0111%
99
BTCMarkets
LINK-AUD$19.84
0.0062137 Eth
$48,085.00
2,423.246 LINK
0.0082%
100
Dex-Trade
LINK-ETH$19.85
0.0061865 Eth
$25,258.00
1,272.350 LINK
0.0043%

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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