ETH Price: $3,208.31 (-3.54%)
Gas: 5.02 Gwei
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,939 ( 0.002%)

Market

Price

$24.32 @ 0.007580 ETH (-6.03%)

Onchain Market Cap

$24,320,000,000.00

Circulating Supply Market Cap

$15,495,590,666.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
75.5994 LINK

Value
$1,838.58 ( ~0.573068915892543 Eth) [0.0000%]
0x250ece0304ea2b9a6e9e071e53fb0dd6f5452929
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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 22009.09% |ETH 0.0003846 1870.88%

Market

Volume (24H):$755,687,263.00
Market Capitalization:$15,495,590,666.00
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
Binance
LINK-USDT$24.36
0.0075977 Eth
$92,972,359.00
3,709,043.820 LINK
18.6970%
2
Coinbase Exchange
LINK-USD$24.35
0.0075914 Eth
$47,576,663.00
1,953,947.290 LINK
9.8497%
3
WhiteBIT
LINK-USDT$24.37
0.0075952 Eth
$37,582,260.00
1,542,449.880 LINK
7.7754%
4
Bybit
LINK-USDT$24.36
0.0075929 Eth
$33,757,652.00
1,352,921.845 LINK
6.8200%
5
Slex
LINK-USDT$24.35
0.0075956 Eth
$24,459,103.00
976,959.600 LINK
4.9248%
6
P2B
LINK-USDT$24.35
0.0075908 Eth
$18,848,299.00
774,205.040 LINK
3.9027%
7
HTX
LINK-USDT$24.34
0.0075883 Eth
$15,608,613.00
623,355.673 LINK
3.1423%
8
OKX
LINK-USDT$24.34
0.0075882 Eth
$13,440,712.00
538,249.027 LINK
2.7133%
9
DigiFinex
LINK-USDT$24.35
0.0075885 Eth
$11,513,515.00
472,924.900 LINK
2.3840%
10
Gate.io
LINK-USDT$24.37
0.0075953 Eth
$9,558,402.00
382,341.180 LINK
1.9274%
11
XT.COM
LINK-USDT$24.34
0.0075883 Eth
$9,285,378.00
370,327.780 LINK
1.8668%
12
Azbit
LINK-USDT$24.36
0.0075820 Eth
$9,180,793.00
366,098.805 LINK
1.8455%
13
Coinstore
LINK-USDT$24.29
0.0075749 Eth
$8,696,701.00
347,150.700 LINK
1.7500%
14
Binance
LINK-USDC$24.34
0.0075914 Eth
$8,262,694.00
330,883.940 LINK
1.6680%
15
Bitunix
LINK-USDT$24.35
0.0075923 Eth
$7,008,332.00
287,871.380 LINK
1.4511%
16
KuCoin
LINK-USDT$24.39
0.0076022 Eth
$6,897,906.00
282,845.616 LINK
1.4258%
17
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.31
0.0075846 Eth
$6,855,564.00
278,634.645 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.4046%
18
Kraken
LINK-USD$24.34
0.0075888 Eth
$6,653,779.00
273,314.066 LINK
1.3778%
19
Hotcoin
LINK-USDT$24.36
0.0075925 Eth
$6,631,170.00
272,229.840 LINK
1.3723%
20
CoinW
LINK-USDT$24.38
0.0076005 Eth
$6,318,637.00
259,150.660 LINK
1.3064%
21
BTSE
LINK-USDT$24.31
0.0075761 Eth
$6,018,652.00
247,530.458 LINK
1.2478%
22
Binance
LINK-FDUSD$24.29
0.0075727 Eth
$6,013,327.00
239,963.780 LINK
1.2096%
23
BYDFi
LINK-USDT$24.21
0.0075523 Eth
$5,040,780.00
208,215.950 LINK
1.0496%
24
LATOKEN
LINK-USDT$24.05
0.0074952 Eth
$4,539,970.00
188,770.845 LINK
0.9516%
25
LBank
LINK-USDT$24.34
0.0075883 Eth
$4,400,438.00
180,767.590 LINK
0.9112%
26
FMCPAY
LINK-USDT$24.35
0.0075928 Eth
$4,045,318.00
162,389.616 LINK
0.8186%
27
QMall
LINK-USDT$24.36
0.0075966 Eth
$3,799,319.00
151,644.327 LINK
0.7644%
28
Coinbase Exchange
LINK-GBP$24.39
0.0076031 Eth
$3,613,944.00
148,156.210 LINK
0.7468%
29
Coinbase Exchange
LINK-EUR$24.39
0.0076029 Eth
$3,375,803.00
138,397.130 LINK
0.6976%
30
Dex-Trade
LINK-USDT$24.33
0.0075891 Eth
$2,893,097.00
118,910.550 LINK
0.5994%
31
Bitvavo
LINK-EUR$24.38
0.0076066 Eth
$2,841,765.00
116,538.689 LINK
0.5875%
32
WhiteBIT
LINK-BTC$24.39
0.0076014 Eth
$2,172,094.00
89,074.940 LINK
0.4490%
33
Bitstamp
LINK-USD$24.40
0.0076055 Eth
$2,139,161.00
87,670.515 LINK
0.4419%
34
Biconomy.com
LINK-USDT$24.36
0.0075981 Eth
$2,038,058.00
81,528.500 LINK
0.4110%
35
CoinEx
LINK-USDT$24.34
0.0075906 Eth
$1,855,600.00
74,227.584 LINK
0.3742%
36
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.34
0.0075865 Eth
$1,821,982.00
73,869.599 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3724%
37
WhiteBIT
LINK-TRY$24.35
0.0075905 Eth
$1,775,994.00
72,935.880 LINK
0.3677%
38
FMCPAY
LINK-ETH$24.36
0.0075859 Eth
$1,711,050.00
69,133.440 LINK
0.3485%
39
FMCPAY
LINK-BTC$24.34
0.0075885 Eth
$1,587,474.00
64,445.300 LINK
0.3249%
40
ProBit Global
LINK-USDT$24.36
0.0075943 Eth
$1,579,914.00
64,850.350 LINK
0.3269%
41
PointPay
LINK-USDT$24.35
0.0075898 Eth
$1,452,370.00
57,892.691 LINK
0.2918%
42
Bitbank
LINK-JPY$24.52
0.0076437 Eth
$1,252,155.00
51,065.543 LINK
0.2574%
43
Kraken
LINK-EUR$24.39
0.0076034 Eth
$1,174,466.00
48,150.650 LINK
0.2427%
44
EXMO
LINK-USDT$24.38
0.0076013 Eth
$1,058,854.00
43,423.187 LINK
0.2189%
45
Trubit
LINK-USDT$24.37
0.0075961 Eth
$1,032,084.00
41,119.770 LINK
0.2073%
46
Gemini
LINK-USD$24.38
0.0075979 Eth
$1,026,548.00
42,114.096 LINK
0.2123%
47
tanX
LINK-USDC$24.35
0.0075897 Eth
$1,010,970.00
40,324.480 LINK
0.2033%
48
BigONE
LINK-USDT$24.46
0.0076234 Eth
$973,369.00
39,797.550 LINK
0.2006%
49
Phemex
LINK-USDT$24.37
0.0075961 Eth
$959,312.00
39,367.670 LINK
0.1984%
50
QMall
LINK-USDC$24.34
0.0075901 Eth
$670,763.00
26,849.614 LINK
0.1353%
51
Bybit
LINK-USDC$24.40
0.0076062 Eth
$662,400.00
26,500.912 LINK
0.1336%
52
Binance
LINK-TRY$24.41
0.0076102 Eth
$638,667.00
25,418.630 LINK
0.1281%
53
EarnBIT
LINK-USDT$24.25
0.0075629 Eth
$633,254.00
25,360.530 LINK
0.1278%
54
itBit
LINK-USD$24.37
0.0076015 Eth
$617,613.00
25,343.169 LINK
0.1278%
55
Binance
LINK-EUR$24.33
0.0075747 Eth
$599,675.00
23,996.610 LINK
0.1210%
56
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$24.36
0.0075949 Eth
$594,282.00
23,811.373 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1200%
57
Coinbase Exchange
LINK-USDT$24.34
0.0075912 Eth
$578,154.00
23,753.761 LINK
0.1197%
58
GMO Japan
LINK-JPY$24.44
0.0076198 Eth
$571,832.00
23,397.300 LINK
0.1179%
59
OKX
LINK-USDC$24.39
0.0076034 Eth
$560,572.00
22,269.609 LINK
0.1123%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.38
0.0075983 Eth
$559,829.00
22,778.036 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1148%
61
WhiteBIT
LINK-EUR$24.43
0.0076156 Eth
$543,549.00
22,248.620 LINK
0.1122%
62
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.34
0.0075934 Eth
$489,506.00
38,978.042 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1965%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.26
0.0075609 Eth
$461,246.00
18,749.049 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0945%
64
Slex
LINK-ETH$24.31
0.0075810 Eth
$430,820.00
17,428.550 LINK
0.0879%
65
HashKey Exchange
LINK-USD$24.37
0.0075971 Eth
$415,968.00
16,671.245 LINK
0.0840%
66
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.32
0.0075872 Eth
$404,396.00
417,680.206 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.1055%
67
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$24.26
0.0075609 Eth
$393,273.00
15,698.208 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0791%
68
ProBit Global
LINK-BTC$24.28
0.0075724 Eth
$384,374.00
15,833.470 LINK
0.0798%
69
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.38
0.0076060 Eth
$380,905.00
15,321.430 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0772%
70
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.26
0.0075609 Eth
$300,078.00
309,383.886 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.5596%
71
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.11
0.0075158 Eth
$285,787.00
11,718.514 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0591%
72
BitDelta
LINK-USDT$24.35
0.0075914 Eth
$284,974.00
11,374.000 LINK
0.0573%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.38
0.0075992 Eth
$277,659.00
11,202.555 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0565%
74
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.40
0.0076023 Eth
$275,399.00
10,972.991 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0553%
75
LATOKEN
LINK-BTC$24.06
0.0075005 Eth
$269,872.00
11,215.215 LINK
0.0565%
76
Coinbase Exchange
LINK-ETH$24.35
0.0075906 Eth
$266,777.00
10,955.780 LINK
0.0552%
77
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$24.39
0.0076029 Eth
$264,938.00
10,741.498 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0541%
78
Bitci TR
LINK-TRY$24.27
0.0075714 Eth
$248,264.00
9,894.069 LINK
0.0499%
79
Hotcoin
LINK-BTC$24.36
0.0075934 Eth
$242,240.00
9,944.350 LINK
0.0501%
80
Binance US
LINK-USDT$24.31
0.0075821 Eth
$238,408.00
9,808.433 LINK
0.0494%
81
Coinbase Exchange
LINK-BTC$24.36
0.0075928 Eth
$230,716.00
9,472.020 LINK
0.0477%
82
BitStorage
LINK-ETH$24.35
0.0075914 Eth
$208,371.00
8,556.260 LINK
0.0431%
83
Bitkub
LINK-THB$24.36
0.0075948 Eth
$207,719.00
8,525.684 LINK
0.0430%
84
BYDFi
LINK-USDC$24.36
0.0075948 Eth
$193,666.00
7,950.810 LINK
0.0401%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.34
0.0075865 Eth
$122,421.00
125,952.530 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6349%
86
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.34
0.0075934 Eth
$112,954.00
4,508.984 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0227%
87
PointPay
LINK-BTC$24.37
0.0075955 Eth
$104,498.00
4,239.526 LINK
0.0214%
88
Mercado Bitcoin
LINK-BRL$24.57
0.0076575 Eth
$98,222.00
3,997.489 LINK
0.0202%
89
Bitso
LINK-USD$24.39
0.0076032 Eth
$89,196.00
3,656.766 LINK
0.0184%
90
Hotcoin
LINK-ETH$24.35
0.0075915 Eth
$76,273.00
3,131.950 LINK
0.0158%
91
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.35
0.0075905 Eth
$73,545.00
2,986.142 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0151%
92
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.26
0.0075656 Eth
$69,365.00
2,805.006 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0141%
93
Coins.ph
LINK-PHP$24.42
0.0076168 Eth
$46,995.00
1,848.303 LINK
0.0093%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$24.29
0.0075703 Eth
$41,780.00
1,690.473 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0085%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$24.38
0.0075977 Eth
$39,463.00
1,572.154 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0079%
96
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$24.25
0.0075609 Eth
$32,623.00
44.410 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
97
Dex-Trade
LINK-ETH$24.32
0.0075822 Eth
$30,954.00
1,272.550 LINK
0.0064%
98
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$24.26
0.0075620 Eth
$29,133.00
1,207.849 0X5947BB275C521040051D82396192181B413227A3
0.0061%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.37
0.0075963 Eth
$25,127.00
1,022.822 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0052%
100
zondacrypto
LINK-PLN$24.26
0.0075638 Eth
$17,322.18
714.002 LINK
0.0036%

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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