ETH Price: $3,116.88 (+1.33%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

732,180 ( 0.031%)

Market

Price

$23.86 @ 0.007655 ETH (+6.31%)

Onchain Market Cap

$23,860,000,000.00

Circulating Supply Market Cap

$15,227,497,329.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
5.387438669999999488 LINK

Value
$128.54 ( ~0.0412400158985258 Eth) [0.0000%]
0x87f44dcd23ce8959c8739aa02713f4a89aace756
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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 21590.91% |ETH 0.0003846 1890.38%

Market

Volume (24H):$973,408,926.00
Market Capitalization:$15,227,497,329.00
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$23.88
0.0076303 Eth
$126,151,597.00
5,422,723.460 LINK
21.2711%
2
Coinbase Exchange
LINK-USD$23.75
0.0076063 Eth
$63,788,843.00
2,686,185.330 LINK
10.5368%
3
Bybit
LINK-USDT$23.71
0.0076058 Eth
$49,232,371.00
2,119,441.406 LINK
8.3137%
4
OKX
LINK-USDT$23.71
0.0076039 Eth
$26,868,626.00
1,167,089.928 LINK
4.5780%
5
P2B
LINK-USDT$23.74
0.0076145 Eth
$21,539,671.00
907,348.210 LINK
3.5592%
6
DigiFinex
LINK-USDT$23.70
0.0075998 Eth
$17,623,132.00
743,719.590 LINK
2.9173%
7
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.93
0.0076763 Eth
$17,526,171.00
749,597.424 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.9404%
8
Gate.io
LINK-USDT$23.71
0.0076045 Eth
$17,320,504.00
744,018.920 LINK
2.9185%
9
MEXC
LINK-USDT$23.74
0.0076063 Eth
$13,908,089.00
585,944.120 LINK
2.2984%
10
HTX
LINK-USDT$23.71
0.0076035 Eth
$13,844,268.00
596,412.791 LINK
2.3395%
11
XT.COM
LINK-USDT$23.79
0.0076160 Eth
$12,497,797.00
537,295.830 LINK
2.1076%
12
Azbit
LINK-USDT$23.76
0.0076112 Eth
$12,271,308.00
527,503.694 LINK
2.0692%
13
Binance
LINK-FDUSD$23.68
0.0075959 Eth
$10,837,438.00
465,797.390 LINK
1.8271%
14
Kraken
LINK-USD$23.74
0.0076131 Eth
$10,692,035.00
450,475.472 LINK
1.7670%
15
Bitunix
LINK-USDT$23.71
0.0076035 Eth
$10,500,723.00
442,946.470 LINK
1.7375%
16
Binance
LINK-USDC$23.72
0.0075965 Eth
$10,384,719.00
444,195.230 LINK
1.7424%
17
Coinstore
LINK-USDT$23.76
0.0076095 Eth
$10,200,519.00
438,685.610 LINK
1.7208%
18
KuCoin
LINK-USDT$23.72
0.0076075 Eth
$9,801,360.00
413,257.049 LINK
1.6210%
19
CoinW
LINK-USDT$23.78
0.0076179 Eth
$8,445,833.00
355,110.420 LINK
1.3930%
20
Coinbase Exchange
LINK-EUR$23.74
0.0076042 Eth
$7,299,162.00
307,467.820 LINK
1.2061%
21
BYDFi
LINK-USDT$23.78
0.0076128 Eth
$7,211,980.00
303,335.040 LINK
1.1899%
22
BTSE
LINK-USDT$23.75
0.0076059 Eth
$6,536,877.00
275,273.014 LINK
1.0798%
23
LBank
LINK-USDT$23.77
0.0076126 Eth
$6,245,764.00
262,767.670 LINK
1.0307%
24
LATOKEN
LINK-USDT$23.75
0.0076080 Eth
$6,233,018.00
262,419.180 LINK
1.0294%
25
QMall
LINK-USDT$23.84
0.0076153 Eth
$5,242,607.00
225,256.350 LINK
0.8836%
26
Bitvavo
LINK-EUR$23.78
0.0076146 Eth
$4,745,095.00
199,548.005 LINK
0.7827%
27
WhiteBIT
LINK-USDT$23.90
0.0076557 Eth
$4,723,371.00
197,627.040 LINK
0.7752%
28
Dex-Trade
LINK-USDT$23.74
0.0076035 Eth
$3,780,062.00
159,198.570 LINK
0.6245%
29
FMCPAY
LINK-USDT$23.77
0.0076101 Eth
$3,624,585.00
156,031.036 LINK
0.6120%
30
Biconomy.com
LINK-USDT$23.69
0.0075978 Eth
$3,417,615.00
148,470.690 LINK
0.5824%
31
CoinEx
LINK-USDT$23.74
0.0076135 Eth
$2,648,091.00
114,007.199 LINK
0.4472%
32
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.74
0.0076048 Eth
$2,425,796.00
104,262.064 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4090%
33
PointPay
LINK-USDT$23.76
0.0076046 Eth
$2,112,337.00
90,758.349 LINK
0.3560%
34
Coinbase Exchange
LINK-GBP$23.73
0.0075986 Eth
$1,959,720.00
82,582.600 LINK
0.3239%
35
WhiteBIT
LINK-TRY$23.78
0.0076178 Eth
$1,903,849.00
80,051.060 LINK
0.3140%
36
FMCPAY
LINK-ETH$23.77
0.0076097 Eth
$1,683,026.00
72,422.720 LINK
0.2841%
37
Phemex
LINK-USDT$23.82
0.0076056 Eth
$1,603,354.00
67,311.470 LINK
0.2640%
38
FMCPAY
LINK-BTC$23.92
0.0076247 Eth
$1,487,792.00
63,114.700 LINK
0.2476%
39
Kraken
LINK-EUR$23.93
0.0076743 Eth
$1,331,323.00
55,644.388 LINK
0.2183%
40
EarnBIT
LINK-USDT$23.75
0.0076044 Eth
$1,330,054.00
57,818.201 LINK
0.2268%
41
OKX
LINK-USDC$23.73
0.0076122 Eth
$1,238,172.00
53,527.999 LINK
0.2100%
42
Binance
LINK-TRY$23.78
0.0076105 Eth
$1,215,737.00
52,143.790 LINK
0.2045%
43
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.80
0.0076336 Eth
$1,169,686.00
97,141.325 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3810%
44
EXMO
LINK-USDT$23.72
0.0076082 Eth
$1,157,705.00
48,802.642 LINK
0.1914%
45
Tokpie
LINK-USDT$23.90
0.0076651 Eth
$1,122,009.00
46,946.981 LINK
0.1842%
46
tanX
LINK-USDC$23.76
0.0076132 Eth
$1,080,122.00
46,693.940 LINK
0.1832%
47
Bitbank
LINK-JPY$23.81
0.0076269 Eth
$1,074,679.00
45,134.643 LINK
0.1770%
48
WhiteBIT
LINK-BTC$23.79
0.0076200 Eth
$1,063,639.00
44,711.290 LINK
0.1754%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.77
0.0076131 Eth
$1,018,932.00
43,800.292 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1718%
50
Binance
LINK-ETH$23.77
0.0076121 Eth
$1,004,085.00
43,244.010 LINK
0.1696%
51
WhiteBIT
LINK-EUR$23.93
0.0076426 Eth
$949,363.00
39,679.720 LINK
0.1556%
52
Binance
LINK-EUR$23.73
0.0076110 Eth
$942,994.00
40,414.980 LINK
0.1585%
53
BigONE
LINK-USDT$23.90
0.0076011 Eth
$929,755.00
38,901.360 LINK
0.1526%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.80
0.0076209 Eth
$920,300.00
39,422.547 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1546%
55
BitStorage
LINK-USDT$23.75
0.0076080 Eth
$916,869.00
38,601.520 LINK
0.1514%
56
Trubit
LINK-USDT$23.92
0.0076290 Eth
$846,643.00
36,524.570 LINK
0.1433%
57
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.71
0.0075924 Eth
$846,121.00
36,522.639 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1433%
58
Bybit
LINK-USDC$23.74
0.0076133 Eth
$819,063.00
35,435.431 LINK
0.1390%
59
QMall
LINK-USDC$23.75
0.0076070 Eth
$812,593.00
34,717.382 LINK
0.1362%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.78
0.0076145 Eth
$810,709.00
34,940.007 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1371%
61
Gemini
LINK-USD$23.73
0.0076092 Eth
$805,468.00
33,949.607 LINK
0.1332%
62
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.77
0.0076138 Eth
$736,362.00
722,150.075 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.8327%
63
Coinbase Exchange
LINK-USDT$23.73
0.0076046 Eth
$727,536.00
30,657.628 LINK
0.1203%
64
itBit
LINK-USD$23.73
0.0075985 Eth
$573,130.00
24,152.117 LINK
0.0947%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.80
0.0076218 Eth
$542,847.00
23,243.623 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0912%
66
LATOKEN
LINK-BTC$23.83
0.0076313 Eth
$532,124.00
22,334.640 LINK
0.0876%
67
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.75
0.0076075 Eth
$526,951.00
22,608.438 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0887%
68
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.61
0.0075607 Eth
$505,099.00
21,664.895 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0850%
69
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.83
0.0076302 Eth
$499,725.00
21,351.237 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0838%
70
Coinbase Exchange
LINK-BTC$23.71
0.0076043 Eth
$430,048.00
18,139.730 LINK
0.0712%
71
Coinbase Exchange
LINK-ETH$23.77
0.0076122 Eth
$304,792.00
12,821.670 LINK
0.0503%
72
BitMart
LINK-BTC$23.80
0.0076196 Eth
$292,341.00
12,285.360 LINK
0.0482%
73
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.74
0.0076132 Eth
$292,024.00
12,563.779 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0493%
74
HashKey Exchange
LINK-USD$23.74
0.0076052 Eth
$271,571.00
11,695.084 LINK
0.0459%
75
GMO Japan
LINK-JPY$23.73
0.0076019 Eth
$271,108.00
11,423.200 LINK
0.0448%
76
Bitso
LINK-USD$23.87
0.0076468 Eth
$233,474.00
9,779.189 LINK
0.0384%
77
Slex
LINK-ETH$23.78
0.0076149 Eth
$226,936.00
9,768.850 LINK
0.0383%
78
Hotcoin
LINK-BTC$23.73
0.0076010 Eth
$225,775.00
9,514.030 LINK
0.0373%
79
Kraken
LINK-USDC$23.75
0.0076177 Eth
$214,803.00
9,044.648 LINK
0.0355%
80
BitStorage
LINK-ETH$23.86
0.0076263 Eth
$208,764.00
8,748.810 LINK
0.0343%
81
PointPay
LINK-BTC$23.78
0.0076105 Eth
$207,689.00
8,831.861 LINK
0.0346%
82
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.72
0.0076084 Eth
$207,427.00
8,860.507 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0348%
83
KuCoin
LINK-USDC$23.71
0.0076045 Eth
$203,243.00
8,572.769 LINK
0.0336%
84
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.85
0.0076434 Eth
$201,283.00
8,627.403 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0338%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.72
0.0075996 Eth
$189,391.00
184,746.961 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.7247%
86
BYDFi
LINK-USDC$23.81
0.0076000 Eth
$188,169.00
7,904.230 LINK
0.0310%
87
CoinTR
LINK-TRY$23.75
0.0076060 Eth
$175,537.00
7,565.690 LINK
0.0297%
88
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.86
0.0076393 Eth
$171,984.00
167,851.547 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6584%
89
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.79
0.0076197 Eth
$160,124.00
6,878.907 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0270%
90
Mercado Bitcoin
LINK-BRL$23.63
0.0075680 Eth
$148,319.00
6,275.453 LINK
0.0246%
91
Kraken
LINK-GBP$23.90
0.0076672 Eth
$141,059.00
5,901.146 LINK
0.0231%
92
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.80
0.0076336 Eth
$133,986.00
11,101.275 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0435%
93
Bitkub
LINK-THB$23.86
0.0076209 Eth
$129,847.00
5,441.452 LINK
0.0213%
94
Binance US
LINK-USDT$23.70
0.0075915 Eth
$116,491.00
4,914.817 LINK
0.0193%
95
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.95
0.0076762 Eth
$107,772.00
4,526.919 0X5947BB275C521040051D82396192181B413227A3
0.0178%
96
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.69
0.0075931 Eth
$106,304.00
4,535.587 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0178%
97
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.90
0.0076654 Eth
$104,699.00
4,486.748 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0176%
98
BitMart
LINK-ETH$23.80
0.0076208 Eth
$93,109.00
3,912.180 LINK
0.0153%
99
Hotcoin
LINK-ETH$23.79
0.0076159 Eth
$65,765.00
2,764.920 LINK
0.0108%
100
Dex-Trade
LINK-ETH$23.77
0.0076129 Eth
$31,650.00
1,331.320 LINK
0.0052%

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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