ETH Price: $2,677.41 (+1.91%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

734,375 ( 0.013%)

Market

Price

$18.80 @ 0.007022 ETH (+1.74%)

Onchain Market Cap

$18,800,000,000.00

Circulating Supply Market Cap

$11,997,137,550.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.03812547 LINK

Value
$0.72 ( ~0.0002689163744617 Eth) [0.0000%]
0xd7c870aeea03fd06a1f0662e3c805e6210e191d6
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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 16990.91% |ETH 0.0003846 1725.79%

Market

Volume (24H):$793,411,259.00
Market Capitalization:$11,997,137,550.00
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
Coinbase Exchange
LINK-USD$18.76
0.0070084 Eth
$38,390,824.00
2,046,091.970 LINK
12.4176%
2
Bybit
LINK-USDT$18.78
0.0070139 Eth
$30,513,356.00
1,641,802.864 LINK
9.9640%
3
P2B
LINK-USDT$18.80
0.0070166 Eth
$16,251,747.00
864,393.470 LINK
5.2460%
4
WhiteBIT
LINK-USDT$18.76
0.0070018 Eth
$15,551,535.00
828,888.380 LINK
5.0305%
5
DigiFinex
LINK-USDT$18.78
0.0070145 Eth
$13,229,393.00
704,465.380 LINK
4.2754%
6
Gate.io
LINK-USDT$18.78
0.0070115 Eth
$12,449,748.00
675,209.520 LINK
4.0978%
7
OKX
LINK-USDT$18.76
0.0070092 Eth
$11,539,159.00
621,405.169 LINK
3.7713%
8
XT.COM
LINK-USDT$18.79
0.0070131 Eth
$10,557,896.00
571,122.350 LINK
3.4661%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.76
0.0070075 Eth
$10,257,099.00
547,607.743 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.3234%
10
Binance
LINK-USDC$18.79
0.0070183 Eth
$9,718,185.00
524,213.170 LINK
3.1814%
11
Coinstore
LINK-USDT$18.76
0.0070013 Eth
$8,436,429.00
455,607.050 LINK
2.7651%
12
Bitunix
LINK-USDT$18.79
0.0070128 Eth
$7,439,036.00
396,097.870 LINK
2.4039%
13
CoinW
LINK-USDT$18.78
0.0070109 Eth
$7,268,204.00
387,072.230 LINK
2.3491%
14
Binance
LINK-FDUSD$18.78
0.0070084 Eth
$6,772,720.00
366,545.520 LINK
2.2245%
15
Hotcoin
LINK-USDT$18.78
0.0070100 Eth
$6,469,837.00
344,486.210 LINK
2.0907%
16
KuCoin
LINK-USDT$18.75
0.0070044 Eth
$6,086,712.00
324,606.114 LINK
1.9700%
17
BYDFi
LINK-USDT$18.78
0.0070064 Eth
$6,017,076.00
320,378.910 LINK
1.9444%
18
Azbit
LINK-USDT$18.78
0.0070088 Eth
$6,014,834.00
325,241.416 LINK
1.9739%
19
Coinbase Exchange
LINK-EUR$18.78
0.0070127 Eth
$5,306,777.00
282,577.770 LINK
1.7150%
20
BTSE
LINK-USDT$18.77
0.0070072 Eth
$5,116,545.00
272,581.418 LINK
1.6543%
21
LATOKEN
LINK-USDT$18.80
0.0070163 Eth
$4,999,632.00
265,878.076 LINK
1.6136%
22
Kraken
LINK-USD$18.79
0.0070189 Eth
$4,969,034.00
264,447.883 LINK
1.6049%
23
QMall
LINK-USDT$18.81
0.0070183 Eth
$4,374,246.00
236,814.871 LINK
1.4372%
24
Dex-Trade
LINK-USDT$18.81
0.0070198 Eth
$3,079,102.00
163,690.420 LINK
0.9934%
25
MEXC
LINK-USDC$18.80
0.0070193 Eth
$2,905,992.00
154,593.160 LINK
0.9382%
26
Coinbase Exchange
LINK-GBP$18.78
0.0070124 Eth
$2,539,947.00
135,253.590 LINK
0.8208%
27
Bitvavo
LINK-EUR$18.80
0.0070154 Eth
$2,260,900.00
120,272.933 LINK
0.7299%
28
FMCPAY
LINK-USDT$18.78
0.0070091 Eth
$2,190,198.00
117,118.032 LINK
0.7108%
29
PointPay
LINK-USDT$18.79
0.0070078 Eth
$1,757,110.00
95,167.746 LINK
0.5776%
30
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.76
0.0070018 Eth
$1,643,422.00
87,793.302 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5328%
31
Biconomy.com
LINK-USDT$18.80
0.0070175 Eth
$1,641,277.00
87,848.070 LINK
0.5331%
32
CoinEx
LINK-USDT$18.80
0.0070147 Eth
$1,558,430.00
83,958.335 LINK
0.5095%
33
Gemini
LINK-USD$18.81
0.0070259 Eth
$1,385,090.00
73,635.735 LINK
0.4469%
34
Bitstamp
LINK-USD$18.78
0.0070147 Eth
$1,304,088.00
69,440.272 LINK
0.4214%
35
FMCPAY
LINK-ETH$18.80
0.0070139 Eth
$1,261,708.00
67,216.640 LINK
0.4079%
36
FMCPAY
LINK-BTC$18.77
0.0070052 Eth
$1,051,734.00
56,397.350 LINK
0.3423%
37
Tokpie
LINK-USDT$18.81
0.0070211 Eth
$1,015,484.00
53,976.585 LINK
0.3276%
38
Phemex
LINK-USDT$18.80
0.0070168 Eth
$1,012,048.00
53,830.060 LINK
0.3267%
39
BigONE
LINK-USDT$18.77
0.0070106 Eth
$964,872.00
51,393.390 LINK
0.3119%
40
Bitbank
LINK-JPY$18.86
0.0070377 Eth
$959,766.00
50,892.920 LINK
0.3089%
41
EXMO
LINK-USDT$18.79
0.0070147 Eth
$892,165.00
47,492.320 LINK
0.2882%
42
Binance
LINK-TRY$18.79
0.0070187 Eth
$854,456.00
45,925.880 LINK
0.2787%
43
Trubit
LINK-USDT$18.81
0.0070171 Eth
$833,541.00
44,480.580 LINK
0.2700%
44
LATOKEN
LINK-BTC$18.80
0.0070163 Eth
$827,550.00
44,023.321 LINK
0.2672%
45
BitStorage
LINK-USDT$18.79
0.0070136 Eth
$805,739.00
42,879.670 LINK
0.2602%
46
WhiteBIT
LINK-BTC$18.83
0.0070260 Eth
$791,589.00
42,046.570 LINK
0.2552%
47
QMall
LINK-USDC$18.80
0.0070155 Eth
$777,722.00
41,944.734 LINK
0.2546%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.67
0.0069691 Eth
$757,350.00
40,427.304 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2454%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$18.85
0.0070358 Eth
$741,744.00
39,923.312 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2423%
50
Kraken
LINK-EUR$18.81
0.0070251 Eth
$727,887.00
38,703.404 LINK
0.2349%
51
tanX
LINK-USDC$18.80
0.0070204 Eth
$653,037.00
34,665.040 LINK
0.2104%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.76
0.0070027 Eth
$619,121.00
32,882.834 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1996%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.77
0.0070065 Eth
$584,513.00
31,210.290 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1894%
54
EarnBIT
LINK-USDT$18.79
0.0070115 Eth
$568,812.00
30,638.981 LINK
0.1859%
55
Bybit
LINK-USDC$18.79
0.0070195 Eth
$567,445.00
30,817.462 LINK
0.1870%
56
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.87
0.0070430 Eth
$522,749.00
28,391.390 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1723%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.83
0.0070301 Eth
$518,763.00
27,711.590 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1682%
58
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.87
0.0070487 Eth
$502,530.00
51,449.444 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3122%
59
Binance
LINK-EUR$18.80
0.0070126 Eth
$451,494.00
24,414.750 LINK
0.1482%
60
OKX
LINK-USDC$18.78
0.0070167 Eth
$449,220.00
24,383.520 LINK
0.1480%
61
Coinbase Exchange
LINK-USDT$18.81
0.0070190 Eth
$443,140.00
23,556.983 LINK
0.1430%
62
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.85
0.0070358 Eth
$409,028.00
404,270.580 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.4535%
63
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.86
0.0070383 Eth
$359,305.00
19,125.868 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1161%
64
Bitbegin
LINK-USDT$18.79
0.0070118 Eth
$311,902.00
16,533.452 LINK
0.1003%
65
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.89
0.0070565 Eth
$294,964.00
15,939.488 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0967%
66
BitDelta
LINK-USDT$18.79
0.0070137 Eth
$266,386.00
14,276.000 LINK
0.0866%
67
BitMart
LINK-BTC$18.78
0.0070132 Eth
$264,075.00
14,060.620 LINK
0.0853%
68
Hotcoin
LINK-BTC$18.79
0.0070117 Eth
$253,260.00
13,479.270 LINK
0.0818%
69
Bitkub
LINK-THB$18.83
0.0070278 Eth
$231,662.00
12,303.625 LINK
0.0747%
70
BYDFi
LINK-USDC$18.79
0.0070163 Eth
$230,146.00
12,247.190 LINK
0.0743%
71
GMO Japan
LINK-JPY$18.83
0.0070268 Eth
$202,658.00
10,764.800 LINK
0.0653%
72
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.79
0.0070137 Eth
$201,489.00
10,845.255 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0658%
73
Bitci TR
LINK-TRY$18.92
0.0070617 Eth
$186,527.00
9,931.800 LINK
0.0603%
74
Slex
LINK-ETH$18.80
0.0070225 Eth
$170,243.00
9,083.000 LINK
0.0551%
75
Bitso
LINK-USD$18.68
0.0069672 Eth
$165,900.00
8,881.322 LINK
0.0539%
76
BitStorage
LINK-ETH$18.81
0.0070227 Eth
$156,683.00
8,327.640 LINK
0.0505%
77
CoinTR
LINK-TRY$18.76
0.0070051 Eth
$149,939.00
7,990.280 LINK
0.0485%
78
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.88
0.0070447 Eth
$143,093.00
140,125.579 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.8504%
79
Coinbase Exchange
LINK-BTC$18.84
0.0070321 Eth
$139,667.00
7,412.190 LINK
0.0450%
80
KuCoin
LINK-USDC$18.86
0.0070454 Eth
$128,887.00
6,833.542 LINK
0.0415%
81
Kraken
LINK-GBP$18.79
0.0070190 Eth
$125,511.00
6,679.503 LINK
0.0405%
82
Binance
LINK-BNB$18.77
0.0070118 Eth
$118,218.00
6,085.237 LINK
0.0369%
83
KuCoin
LINK-BTC$18.74
0.0070006 Eth
$114,083.00
6,087.344 LINK
0.0369%
84
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.81
0.0070235 Eth
$105,646.00
104,653.648 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6351%
85
Binance US
LINK-USDT$18.83
0.0070317 Eth
$104,570.00
5,553.099 LINK
0.0337%
86
WhiteBIT
LINK-TRY$18.82
0.0070212 Eth
$100,550.00
5,342.540 LINK
0.0324%
87
BitMart
LINK-ETH$18.80
0.0070192 Eth
$84,457.00
4,493.060 LINK
0.0273%
88
PointPay
LINK-BTC$18.81
0.0070193 Eth
$84,131.00
4,562.179 LINK
0.0277%
89
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.79
0.0070163 Eth
$79,671.00
4,248.499 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0258%
90
Hotcoin
LINK-ETH$18.80
0.0070177 Eth
$72,547.00
3,858.550 LINK
0.0234%
91
Mercado Bitcoin
LINK-BRL$18.89
0.0070572 Eth
$63,316.00
3,351.366 LINK
0.0203%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.76
0.0070032 Eth
$60,373.00
3,208.047 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0195%
93
Kraken
LINK-USDC$18.85
0.0070418 Eth
$55,930.00
2,966.846 LINK
0.0180%
94
EXMO
LINK-BTC$18.80
0.0070217 Eth
$51,985.00
2,765.483 LINK
0.0168%
95
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$18.76
0.0070079 Eth
$49,006.00
2,651.201 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0161%
96
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.80
0.0070166 Eth
$47,088.00
2,516.007 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0153%
97
Indodax
LINK-IDR$18.75
0.0069944 Eth
$45,481.00
2,425.787 LINK
0.0147%
98
Bitstamp
LINK-GBP$18.83
0.0070331 Eth
$44,187.00
2,346.715 LINK
0.0142%
99
Bitexen
LINK-TRY$18.63
0.0069460 Eth
$37,435.00
2,009.133 LINK
0.0122%
100
Dex-Trade
LINK-ETH$18.78
0.0070099 Eth
$20,352.00
1,083.510 LINK
0.0066%

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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