ETH Price: $3,335.21 (-1.25%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

726,071 ( -0.137%)

Market

Price

$23.02 @ 0.006902 ETH (+1.84%)

Onchain Market Cap

$23,020,000,000.00

Circulating Supply Market Cap

$14,530,331,363.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Yearn: YFI Token
Balance
2,100 LINK

Value
$48,342.00 ( ~14.4944 Eth) [0.0002%]
0x0bc529c00c6401aef6d220be8c6ea1667f6ad93e
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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 20827.27% |ETH 0.0003846 1694.59%

Market

Volume (24H):$1,306,096,450.00
Market Capitalization:$14,530,331,363.00
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$23.01
0.0068864 Eth
$136,514,501.00
6,093,851.330 LINK
20.5653%
2
WhiteBIT
LINK-USDT$22.99
0.0068829 Eth
$64,041,948.00
2,785,627.380 LINK
9.4008%
3
Coinbase Exchange
LINK-USD$23.09
0.0069073 Eth
$59,883,495.00
2,593,144.890 LINK
8.7512%
4
MEXC
LINK-USDT$23.12
0.0069142 Eth
$37,264,100.00
1,612,031.320 LINK
5.4402%
5
Bybit
LINK-USDT$22.97
0.0068751 Eth
$33,054,522.00
1,476,856.747 LINK
4.9840%
6
OKX
LINK-USDT$23.01
0.0068891 Eth
$24,893,877.00
1,110,001.793 LINK
3.7460%
7
Slex
LINK-USDT$23.13
0.0069261 Eth
$22,792,796.00
1,020,400.090 LINK
3.4436%
8
WEEX
LINK-USDT$23.09
0.0069147 Eth
$19,387,264.00
867,564.450 LINK
2.9278%
9
DigiFinex
LINK-USDT$23.00
0.0068858 Eth
$18,481,339.00
803,411.150 LINK
2.7113%
10
XT.COM
LINK-USDT$23.02
0.0068997 Eth
$16,231,500.00
724,903.670 LINK
2.4464%
11
BTSE
LINK-USDT$23.22
0.0069299 Eth
$15,737,770.00
677,742.325 LINK
2.2872%
12
FameEX
LINK-USDT$23.01
0.0068889 Eth
$13,627,896.00
608,340.512 LINK
2.0530%
13
Azbit
LINK-USDT$23.04
0.0068976 Eth
$13,575,854.00
606,113.708 LINK
2.0455%
14
HTX
LINK-USDT$23.02
0.0068898 Eth
$12,668,516.00
567,460.995 LINK
1.9150%
15
Coinstore
LINK-USDT$23.01
0.0068870 Eth
$11,810,940.00
527,968.520 LINK
1.7818%
16
Bitunix
LINK-USDT$23.03
0.0068925 Eth
$11,771,353.00
511,150.020 LINK
1.7250%
17
Binance
LINK-FDUSD$22.93
0.0068628 Eth
$11,546,663.00
514,267.130 LINK
1.7355%
18
BYDFi
LINK-USDT$23.03
0.0069051 Eth
$7,939,273.00
344,733.710 LINK
1.1634%
19
Kraken
LINK-USD$23.01
0.0068886 Eth
$7,452,271.00
323,938.280 LINK
1.0932%
20
Biconomy.com
LINK-USDT$22.99
0.0068819 Eth
$7,347,746.00
328,301.590 LINK
1.1079%
21
CoinW
LINK-USDT$23.13
0.0069175 Eth
$7,181,029.00
310,498.410 LINK
1.0479%
22
KuCoin
LINK-USDT$22.97
0.0068776 Eth
$6,699,553.00
291,631.552 LINK
0.9842%
23
LATOKEN
LINK-USDT$23.11
0.0069201 Eth
$6,390,338.00
276,554.825 LINK
0.9333%
24
Hotcoin
LINK-USDT$23.21
0.0069329 Eth
$5,651,698.00
243,472.400 LINK
0.8217%
25
QMall
LINK-USDT$23.03
0.0069040 Eth
$5,647,877.00
252,232.906 LINK
0.8512%
26
LBank
LINK-USDT$23.03
0.0068866 Eth
$5,530,254.00
240,172.320 LINK
0.8105%
27
Dex-Trade
LINK-USDT$23.23
0.0069398 Eth
$4,688,113.00
201,790.390 LINK
0.6810%
28
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.06
0.0069014 Eth
$4,377,765.00
192,777.765 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.6506%
29
Coinbase Exchange
LINK-EUR$22.97
0.0068758 Eth
$3,980,574.00
173,321.030 LINK
0.5849%
30
Bitvavo
LINK-EUR$23.21
0.0069237 Eth
$3,659,811.00
157,706.953 LINK
0.5322%
31
FMCPAY
LINK-USDT$23.00
0.0068950 Eth
$3,353,750.00
150,072.686 LINK
0.5065%
32
Dcoin
LINK-USDT$23.14
0.0069193 Eth
$3,246,696.00
140,325.000 LINK
0.4736%
33
ProBit Global
LINK-USDT$23.23
0.0069328 Eth
$2,507,580.00
107,943.619 LINK
0.3643%
34
WhiteBIT
LINK-TRY$23.06
0.0069053 Eth
$2,482,105.00
107,613.590 LINK
0.3632%
35
CoinEx
LINK-USDT$23.01
0.0068874 Eth
$2,386,394.00
106,655.817 LINK
0.3599%
36
PointPay
LINK-USDT$23.16
0.0069169 Eth
$2,264,873.00
101,133.435 LINK
0.3413%
37
WhiteBIT
LINK-BTC$23.03
0.0069007 Eth
$2,242,076.00
97,368.480 LINK
0.3286%
38
FMCPAY
LINK-ETH$23.11
0.0069123 Eth
$1,673,106.00
74,099.520 LINK
0.2501%
39
EXMO
LINK-USDT$23.02
0.0068912 Eth
$1,633,325.00
70,950.421 LINK
0.2394%
40
FMCPAY
LINK-BTC$23.10
0.0069104 Eth
$1,471,784.00
65,378.400 LINK
0.2206%
41
Phemex
LINK-USDT$23.06
0.0069141 Eth
$1,453,205.00
63,018.080 LINK
0.2127%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.07
0.0069073 Eth
$1,341,080.00
59,197.149 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1998%
43
Kraken
LINK-EUR$23.00
0.0068860 Eth
$1,320,809.00
57,434.468 LINK
0.1938%
44
EarnBIT
LINK-USDT$23.09
0.0069185 Eth
$1,195,927.00
53,306.986 LINK
0.1799%
45
tanX
LINK-USDC$23.02
0.0068919 Eth
$1,150,436.00
51,401.990 LINK
0.1735%
46
Nonkyc.io
LINK-USDT$23.19
0.0069414 Eth
$1,147,852.00
51,858.295 LINK
0.1750%
47
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.05
0.0068995 Eth
$1,122,472.00
48,689.094 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1643%
48
BitStorage
LINK-USDT$22.98
0.0068819 Eth
$1,120,429.00
48,750.310 LINK
0.1645%
49
Binance
LINK-TRY$23.19
0.0069368 Eth
$1,112,555.00
49,271.130 LINK
0.1663%
50
KuCoin
LINK-USDC$23.00
0.0068845 Eth
$967,974.00
42,093.877 LINK
0.1421%
51
BigONE
LINK-USDT$23.29
0.0069581 Eth
$960,786.00
41,260.350 LINK
0.1392%
52
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.20
0.0069431 Eth
$931,855.00
64,504.106 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2177%
53
Binance
LINK-EUR$23.00
0.0068858 Eth
$860,823.00
38,351.680 LINK
0.1294%
54
Bybit
LINK-USDC$22.99
0.0068826 Eth
$837,098.00
37,610.228 LINK
0.1269%
55
WhiteBIT
LINK-EUR$23.13
0.0069191 Eth
$804,228.00
34,765.770 LINK
0.1173%
56
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.01
0.0068871 Eth
$755,414.00
33,305.861 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1124%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.03
0.0068929 Eth
$721,569.00
32,097.332 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1083%
58
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.07
0.0069046 Eth
$719,879.00
31,743.151 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1071%
59
Koinpark
LINK-USDT$23.02
0.0068984 Eth
$713,571.00
31,001.947 LINK
0.1046%
60
OKX
LINK-USDC$23.01
0.0068890 Eth
$630,717.00
28,205.978 LINK
0.0952%
61
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.07
0.0069073 Eth
$622,606.00
602,328.377 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.0327%
62
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$22.96
0.0068732 Eth
$618,642.00
27,752.265 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0937%
63
GMO Japan
LINK-JPY$23.21
0.0069351 Eth
$566,300.00
24,398.500 LINK
0.0823%
64
Gemini
LINK-USD$23.03
0.0068974 Eth
$558,766.00
24,257.494 LINK
0.0819%
65
Coinbase Exchange
LINK-USDT$23.18
0.0069314 Eth
$551,518.00
23,796.896 LINK
0.0803%
66
WEEX
LINK-USDC$23.11
0.0069216 Eth
$501,332.00
21,693.333 LINK
0.0732%
67
BitMart
LINK-BTC$23.01
0.0068872 Eth
$437,005.00
18,994.280 LINK
0.0641%
68
BitDelta
LINK-USDT$23.13
0.0069177 Eth
$415,341.00
18,598.000 LINK
0.0628%
69
Coinbase Exchange
LINK-ETH$23.06
0.0069043 Eth
$407,999.00
17,689.700 LINK
0.0597%
70
HashKey Exchange
LINK-USD$23.10
0.0069086 Eth
$399,129.00
17,872.468 LINK
0.0603%
71
Slex
LINK-ETH$23.07
0.0068996 Eth
$393,169.00
17,425.380 LINK
0.0588%
72
Coinbase Exchange
LINK-GBP$23.02
0.0068942 Eth
$313,998.00
13,637.830 LINK
0.0460%
73
Coinbase Exchange
LINK-BTC$23.04
0.0068991 Eth
$287,144.00
12,462.580 LINK
0.0421%
74
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.07
0.0069003 Eth
$282,016.00
12,644.883 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0427%
75
LATOKEN
LINK-BTC$23.05
0.0068999 Eth
$256,690.00
11,136.972 LINK
0.0376%
76
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.20
0.0069431 Eth
$253,744.00
769.883 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0026%
77
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.18
0.0069371 Eth
$223,683.00
10,004.336 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0338%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.06
0.0069034 Eth
$220,531.00
9,787.906 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0330%
79
Binance
LINK-BNB$23.07
0.0069143 Eth
$216,378.00
9,435.394 LINK
0.0318%
80
Bitci TR
LINK-TRY$23.38
0.0069981 Eth
$215,340.00
9,549.780 LINK
0.0322%
81
Hotcoin
LINK-BTC$23.18
0.0069236 Eth
$212,906.00
9,185.550 LINK
0.0310%
82
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.08
0.0069084 Eth
$211,805.00
9,406.980 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0317%
83
BitMart
LINK-ETH$23.00
0.0068836 Eth
$210,640.00
9,160.240 LINK
0.0309%
84
PointPay
LINK-BTC$23.01
0.0068883 Eth
$201,621.00
8,916.528 LINK
0.0301%
85
BitStorage
LINK-ETH$23.03
0.0069040 Eth
$186,398.00
8,094.440 LINK
0.0273%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.06
0.0069051 Eth
$182,810.00
8,087.720 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0273%
87
Bitso
LINK-USD$23.19
0.0069433 Eth
$178,813.00
7,709.323 LINK
0.0260%
88
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.06
0.0069014 Eth
$164,588.00
159,691.397 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5389%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.00
0.0068848 Eth
$153,650.00
6,844.009 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0231%
90
Binance US
LINK-USDT$23.11
0.0069104 Eth
$122,803.00
5,314.540 LINK
0.0179%
91
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.07
0.0069046 Eth
$112,649.00
108,992.497 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3678%
92
Coins.ph
LINK-PHP$23.31
0.0069792 Eth
$102,384.00
4,528.092 LINK
0.0153%
93
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.21
0.0069485 Eth
$101,839.00
4,410.518 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0149%
94
Kanga
LINK-PLN$23.32
0.0069824 Eth
$98,722.00
0.000 LINK
0.0000%
95
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.03
0.0068948 Eth
$97,565.00
4,341.987 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0147%
96
KuCoin
LINK-BTC$22.98
0.0068797 Eth
$92,057.00
4,006.051 LINK
0.0135%
97
Kraken
LINK-GBP$23.19
0.0069438 Eth
$86,968.00
3,750.313 LINK
0.0127%
98
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.12
0.0069221 Eth
$84,080.00
3,713.004 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0125%
99
Mercado Bitcoin
LINK-BRL$23.35
0.0069906 Eth
$77,611.00
3,324.387 LINK
0.0112%
100
HTX
LINK-BTC$22.89
0.0068524 Eth
$14,081.68
622.389 LINK
0.0021%

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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