ETH Price: $2,417.60 (+0.66%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,430 (0.00%)

Market

Price

$11.30 @ 0.004674 ETH (+1.70%)

Onchain Market Cap

$11,300,000,000.00

Circulating Supply Market Cap

$7,080,531,993.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Nexo 2
Balance
0.000000002213419893 LINK

Value
$0.00 ( ~0 Eth) [0.0000%]
0xffec0067f5a79cff07527f63d83dd5462ccf8ba4
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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 10172.73% |ETH 0.0003846 1115.29%

Market

Volume (24H):$262,040,567.00
Market Capitalization:$7,080,531,993.00
Circulating Supply:626,849,971.00 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
LBank
LINK-USDT$11.29
0.0046719 Eth
$27,528,198.00
2,438,248.050 LINK
21.4167%
2
Coinbase Exchange
LINK-USD$11.29
0.0046734 Eth
$9,989,670.00
884,511.210 LINK
7.7692%
3
Bitget
LINK-USDT$11.30
0.0046740 Eth
$8,908,909.00
793,318.515 LINK
6.9682%
4
Bybit
LINK-USDT$11.29
0.0046729 Eth
$7,658,235.00
681,394.445 LINK
5.9851%
5
Websea
LINK-USDT$11.30
0.0046738 Eth
$5,736,104.00
0.000 LINK
0.0000%
6
WhiteBIT
LINK-USDT$11.30
0.0046760 Eth
$5,721,716.00
506,339.630 LINK
4.4475%
7
Azbit
LINK-USDT$11.30
0.0046759 Eth
$5,248,760.00
467,421.700 LINK
4.1057%
8
Biconomy.com
LINK-USDT$11.30
0.0046732 Eth
$4,664,740.00
415,234.530 LINK
3.6473%
9
BVOX
LINK-USDT$11.30
0.0046739 Eth
$3,190,963.00
284,293.330 LINK
2.4971%
10
P2B
LINK-USDT$11.30
0.0046760 Eth
$2,857,878.00
252,906.070 LINK
2.2214%
11
WEEX
LINK-USDT$11.29
0.0046682 Eth
$2,815,752.00
250,458.860 LINK
2.1999%
12
Bitexen
LINK-TRY$11.36
0.0046975 Eth
$2,767,086.00
243,598.290 LINK
2.1397%
13
Poloniex
LINK-USDT$11.30
0.0046719 Eth
$2,589,238.00
230,783.003 LINK
2.0271%
14
Slex
LINK-USDT$11.29
0.0046694 Eth
$2,306,431.00
205,601.310 LINK
1.8059%
15
ProBit Global
LINK-USDT$11.30
0.0046743 Eth
$2,252,538.00
199,411.170 LINK
1.7516%
16
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.30
0.0046736 Eth
$2,169,779.00
192,900.819 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.6944%
17
OKX
LINK-USDT$11.30
0.0046743 Eth
$1,975,708.00
176,053.607 LINK
1.5464%
18
DigiFinex
LINK-USDT$11.29
0.0046736 Eth
$1,702,497.00
150,738.770 LINK
1.3240%
19
AscendEX (BitMax)
LINK-USDT$11.32
0.0046831 Eth
$1,687,175.00
149,062.900 LINK
1.3093%
20
Upbit
LINK-KRW$11.34
0.0046945 Eth
$1,449,065.00
127,729.227 LINK
1.1219%
21
Trubit
LINK-USDT$11.30
0.0046755 Eth
$1,406,493.00
124,980.200 LINK
1.0978%
22
Deepcoin
LINK-USDT$11.29
0.0046707 Eth
$1,402,084.00
131,861.500 LINK
1.1582%
23
KuCoin
LINK-USDT$11.30
0.0046745 Eth
$1,291,790.00
114,354.555 LINK
1.0045%
24
C-Patex
LINK-USDT$11.31
0.0046749 Eth
$1,237,163.00
109,405.639 LINK
0.9610%
25
XT.COM
LINK-USDT$11.31
0.0046730 Eth
$1,186,100.00
105,684.320 LINK
0.9283%
26
Oceanex
LINK-USDT$11.29
0.0046721 Eth
$1,168,000.00
103,436.570 LINK
0.9086%
27
Toobit
LINK-USDT$11.31
0.0046758 Eth
$1,160,789.00
103,483.700 LINK
0.9090%
28
CoinW
LINK-USDT$11.30
0.0046723 Eth
$1,071,878.00
94,832.160 LINK
0.8330%
29
Binance
LINK-BTC$11.28
0.0046641 Eth
$976,305.00
86,813.410 LINK
0.7625%
30
Azbit
LINK-ETH$11.30
0.0046742 Eth
$955,429.00
84,870.347 LINK
0.7455%
31
Crypto.com Exchange
LINK-USDT$11.30
0.0046743 Eth
$883,025.00
78,170.450 LINK
0.6866%
32
Gate.io
LINK-USDT$11.30
0.0046740 Eth
$848,585.00
75,561.390 LINK
0.6637%
33
FMCPAY
LINK-USDT$11.31
0.0046746 Eth
$809,262.00
72,136.444 LINK
0.6336%
34
BloFin
LINK-USDT$11.31
0.0046719 Eth
$729,922.00
65,001.460 LINK
0.5710%
35
BYDFi
LINK-USDT$11.30
0.0046676 Eth
$658,337.00
58,265.380 LINK
0.5118%
36
BTSE
LINK-USDT$11.30
0.0046733 Eth
$655,028.00
57,946.644 LINK
0.5090%
37
Tapbit
LINK-USDT$11.29
0.0046692 Eth
$618,040.00
55,043.530 LINK
0.4835%
38
Hotcoin
LINK-USDT$11.30
0.0046686 Eth
$617,246.00
54,623.320 LINK
0.4798%
39
FMFW.io
LINK-USDT$11.29
0.0046723 Eth
$614,577.00
54,430.670 LINK
0.4781%
40
HitBTC
LINK-USDT$11.30
0.0046737 Eth
$610,690.00
54,427.860 LINK
0.4781%
41
Bitunix
LINK-USDT$11.29
0.0046730 Eth
$578,860.00
51,252.690 LINK
0.4502%
42
Bitvavo
LINK-EUR$11.31
0.0046785 Eth
$551,869.00
48,802.677 LINK
0.4287%
43
QMall
LINK-USDT$11.30
0.0046760 Eth
$545,327.00
48,567.045 LINK
0.4266%
44
Kraken
LINK-USD$11.30
0.0046765 Eth
$539,178.00
47,703.736 LINK
0.4190%
45
FameEX
LINK-USDT$11.30
0.0046761 Eth
$530,017.00
47,239.664 LINK
0.4149%
46
Kraken
LINK-USDT$11.30
0.0046751 Eth
$516,155.00
45,680.493 LINK
0.4012%
47
Bit2Me
LINK-USDT$11.30
0.0046748 Eth
$504,213.00
44,766.883 LINK
0.3932%
48
Binance
LINK-FDUSD$11.30
0.0046757 Eth
$472,526.00
42,170.380 LINK
0.3704%
49
FMCPAY
LINK-ETH$11.30
0.0046732 Eth
$471,683.00
41,927.040 LINK
0.3683%
50
FMCPAY
LINK-BTC$11.30
0.0046731 Eth
$441,568.00
39,349.100 LINK
0.3456%
51
CoinEx
LINK-USDT$11.31
0.0046752 Eth
$395,926.00
35,261.414 LINK
0.3097%
52
Coinbase Exchange
LINK-USDT$11.30
0.0046716 Eth
$381,660.00
33,775.088 LINK
0.2967%
53
Crypto.com Exchange
LINK-USD$11.29
0.0046728 Eth
$362,275.00
32,079.590 LINK
0.2818%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.30
0.0046751 Eth
$318,409.00
28,406.424 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2495%
55
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.24
0.0046465 Eth
$306,742.00
27,369.174 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2404%
56
WhiteBIT
LINK-BTC$11.30
0.0046746 Eth
$266,563.00
23,596.650 LINK
0.2073%
57
MEXC
LINK-USDT$11.31
0.0046777 Eth
$236,984.00
20,960.800 LINK
0.1841%
58
Bitstamp
LINK-EUR$11.29
0.0046711 Eth
$230,194.00
20,390.146 LINK
0.1791%
59
EXMO
LINK-USDT$11.30
0.0046732 Eth
$221,937.00
19,648.672 LINK
0.1726%
60
Bybit
LINK-USDC$11.31
0.0046794 Eth
$214,067.00
19,057.650 LINK
0.1674%
61
PointPay
LINK-USDT$11.29
0.0046694 Eth
$212,514.00
18,933.681 LINK
0.1663%
62
Pionex
LINK-USDT$11.29
0.0046694 Eth
$209,095.00
18,637.680 LINK
0.1637%
63
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.25
0.0046510 Eth
$194,481.00
17,345.131 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1524%
64
BitMart
LINK-BTC$11.31
0.0046755 Eth
$178,633.00
15,799.580 LINK
0.1388%
65
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.28
0.0046645 Eth
$165,502.00
14,730.454 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1294%
66
BigONE
LINK-USDT$11.30
0.0046767 Eth
$160,954.00
14,239.770 LINK
0.1251%
67
WhiteBIT
LINK-EUR$11.30
0.0046753 Eth
$157,335.00
13,925.580 LINK
0.1223%
68
Bithumb
LINK-KRW$11.34
0.0046937 Eth
$148,074.00
13,052.141 LINK
0.1146%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.31
0.0046799 Eth
$145,142.00
12,881.261 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1131%
70
Kraken
LINK-EUR$11.31
0.0046806 Eth
$125,570.00
11,100.166 LINK
0.0975%
71
Koinpark
LINK-USDT$11.30
0.0046760 Eth
$125,408.00
11,097.938 LINK
0.0975%
72
LATOKEN
LINK-BTC$11.25
0.0046512 Eth
$124,406.00
11,060.945 LINK
0.0972%
73
Hotcoin
LINK-ETH$11.30
0.0046689 Eth
$123,646.00
10,941.400 LINK
0.0961%
74
Bit2Me
LINK-EUR$11.31
0.0046806 Eth
$121,765.00
10,878.163 LINK
0.0956%
75
Hotcoin
LINK-BTC$11.31
0.0046715 Eth
$94,308.00
8,340.600 LINK
0.0733%
76
Nominex
LINK-USDT$11.31
0.0046758 Eth
$93,487.00
8,265.822 LINK
0.0726%
77
Slex
LINK-ETH$11.28
0.0046684 Eth
$75,475.00
6,692.870 LINK
0.0588%
78
Slex
LINK-BTC$11.30
0.0046744 Eth
$70,346.00
6,263.100 LINK
0.0550%
79
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.27
0.0046617 Eth
$50,605.00
4,469.346 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0393%
80
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.30
0.0046756 Eth
$43,515.00
43,188.876 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3794%
81
GMO Japan
LINK-JPY$11.36
0.0047016 Eth
$39,573.00
3,482.500 LINK
0.0306%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.30
0.0046769 Eth
$24,804.00
2,212.265 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0194%
83
EXMO
LINK-BTC$11.32
0.0046844 Eth
$23,683.00
2,091.683 LINK
0.0184%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.30
0.0046756 Eth
$22,383.00
1,999.184 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0176%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.31
0.0046779 Eth
$21,755.00
1,927.251 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0169%
86
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.24
0.0046509 Eth
$19,999.01
19,870.718 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1745%
87
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.28
0.0046645 Eth
$19,721.86
19,595.840 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1721%
88
TokoCrypto
LINK-USDT$11.31
0.0046758 Eth
$18,539.16
1,639.465 LINK
0.0144%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.25
0.0046500 Eth
$13,609.39
1,222.825 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0107%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.30
0.0046722 Eth
$8,663.18
770.455 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0068%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.30
0.0046735 Eth
$3,929.97
349.479 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0031%
92
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.25
0.0046500 Eth
$3,647.70
3,613.086 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0317%
93
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.28
0.0046642 Eth
$2,373.76
211.659 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0019%
94
CoinEx
LINK-USDC$11.32
0.0046817 Eth
$2,147.57
191.134 LINK
0.0017%
95
CoinEx
LINK-BTC$11.31
0.0046753 Eth
$2,132.18
189.786 LINK
0.0017%
96
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.27
0.0046646 Eth
$1,263.13
112.943 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0010%
97
Quickswap
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.22
0.0046404 Eth
$797.34
62.078 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0005%
98
Energiswap
0X68CA48CA2626C415A89756471D4ADE2CC9034008-0XA55F26319462355474A9F2C8790860776A329AA4$11.21
0.0046345 Eth
$236.55
21.213 0X68CA48CA2626C415A89756471D4ADE2CC9034008
0.0002%
99
Coinzoom
LINK-USD$11.29
0.0046735 Eth
$169.41
15.000 LINK
0.0001%
100
CEX.IO
LINK-USDT$11.30
0.0046765 Eth
$161.07
14.336 LINK
0.0001%

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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