ETH Price: $3,118.92 (-5.49%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

732,939 ( 0.049%)

Market

Price

$23.09 @ 0.007403 ETH (-7.52%)

Onchain Market Cap

$23,090,000,000.00

Circulating Supply Market Cap

$14,727,054,149.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
Binance Dep: 0x1788cF08256cb7C18398C0E6040d61E04651F478
Balance
3.5949 LINK

Value
$83.01 ( ~0.0266150051372528 Eth) [0.0000%]
0x1788cF08256cb7C18398C0E6040d61E04651F478
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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 20890.91% |ETH 0.0003846 1824.86%

Market

Volume (24H):$796,404,047.00
Market Capitalization:$14,727,054,149.00
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$23.11
0.0073715 Eth
$109,889,259.00
4,438,953.390 LINK
22.7993%
2
Coinbase Exchange
LINK-USD$23.01
0.0073505 Eth
$45,433,368.00
1,974,162.160 LINK
10.1397%
3
Bybit
LINK-USDT$23.08
0.0073594 Eth
$33,266,406.00
1,349,221.494 LINK
6.9299%
4
P2B
LINK-USDT$23.06
0.0073358 Eth
$21,653,313.00
939,143.630 LINK
4.8236%
5
OKX
LINK-USDT$23.10
0.0073667 Eth
$19,357,893.00
785,048.743 LINK
4.0322%
6
Slex
LINK-USDT$23.05
0.0073612 Eth
$17,512,613.00
707,390.790 LINK
3.6333%
7
HTX
LINK-USDT$23.03
0.0073561 Eth
$13,494,738.00
544,756.031 LINK
2.7980%
8
DigiFinex
LINK-USDT$23.00
0.0073525 Eth
$13,408,012.00
582,842.480 LINK
2.9936%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.09
0.0073790 Eth
$13,208,287.00
552,116.919 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.8358%
10
XT.COM
LINK-USDT$23.24
0.0073597 Eth
$10,962,910.00
441,575.760 LINK
2.2680%
11
Azbit
LINK-USDT$23.10
0.0073684 Eth
$10,878,515.00
439,363.425 LINK
2.2567%
12
Coinstore
LINK-USDT$23.05
0.0073599 Eth
$9,899,601.00
400,427.310 LINK
2.0567%
13
MEXC
LINK-USDT$23.05
0.0073660 Eth
$9,567,279.00
415,123.590 LINK
2.1322%
14
KuCoin
LINK-USDT$23.12
0.0073751 Eth
$8,853,973.00
383,036.917 LINK
1.9674%
15
Bitunix
LINK-USDT$23.00
0.0073467 Eth
$8,131,436.00
353,441.220 LINK
1.8153%
16
Binance
LINK-USDC$23.04
0.0073530 Eth
$7,111,539.00
290,213.810 LINK
1.4906%
17
Binance
LINK-FDUSD$22.93
0.0073234 Eth
$6,849,774.00
278,044.870 LINK
1.4281%
18
CoinW
LINK-USDT$23.16
0.0073705 Eth
$6,531,688.00
282,004.940 LINK
1.4484%
19
BYDFi
LINK-USDT$23.17
0.0073880 Eth
$5,749,900.00
248,183.720 LINK
1.2747%
20
Kraken
LINK-USD$23.02
0.0073406 Eth
$5,671,858.00
246,341.273 LINK
1.2653%
21
BTSE
LINK-USDT$23.05
0.0073512 Eth
$5,666,108.00
245,767.055 LINK
1.2623%
22
LATOKEN
LINK-USDT$23.04
0.0073624 Eth
$5,103,879.00
221,565.659 LINK
1.1380%
23
LBank
LINK-USDT$23.01
0.0073484 Eth
$4,978,980.00
216,410.860 LINK
1.1115%
24
QMall
LINK-USDT$23.06
0.0073645 Eth
$4,464,250.00
180,040.325 LINK
0.9247%
25
FMCPAY
LINK-USDT$23.02
0.0073485 Eth
$4,354,377.00
177,344.744 LINK
0.9109%
26
Bitvavo
LINK-EUR$23.17
0.0073895 Eth
$3,826,379.00
165,139.259 LINK
0.8482%
27
Coinbase Exchange
LINK-EUR$23.08
0.0073668 Eth
$3,720,359.00
161,205.320 LINK
0.8280%
28
Dex-Trade
LINK-USDT$23.02
0.0073514 Eth
$3,314,740.00
144,014.960 LINK
0.7397%
29
Hotcoin
LINK-USDT$23.11
0.0073689 Eth
$2,917,130.00
126,246.800 LINK
0.6484%
30
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.02
0.0073534 Eth
$1,981,076.00
83,863.312 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4307%
31
CoinEx
LINK-USDT$23.13
0.0073593 Eth
$1,976,029.00
80,963.723 LINK
0.4158%
32
FMCPAY
LINK-BTC$23.15
0.0073588 Eth
$1,741,641.00
71,396.300 LINK
0.3667%
33
PointPay
LINK-USDT$23.00
0.0073496 Eth
$1,724,698.00
69,735.220 LINK
0.3582%
34
FMCPAY
LINK-ETH$23.15
0.0073731 Eth
$1,708,497.00
71,398.880 LINK
0.3667%
35
Coinbase Exchange
LINK-GBP$23.03
0.0073516 Eth
$1,518,862.00
65,950.010 LINK
0.3387%
36
EXMO
LINK-USDT$23.03
0.0073615 Eth
$1,111,470.00
48,253.554 LINK
0.2478%
37
tanX
LINK-USDC$23.06
0.0073499 Eth
$1,108,855.00
45,083.470 LINK
0.2316%
38
Phemex
LINK-USDT$23.03
0.0073505 Eth
$1,069,960.00
46,465.320 LINK
0.2387%
39
Binance
LINK-TRY$23.32
0.0074380 Eth
$1,013,706.00
40,860.410 LINK
0.2099%
40
Bitstamp
LINK-USD$23.03
0.0073606 Eth
$952,772.00
41,370.924 LINK
0.2125%
41
EarnBIT
LINK-USDT$23.10
0.0073704 Eth
$919,645.00
37,318.762 LINK
0.1917%
42
Bitbank
LINK-JPY$23.07
0.0073700 Eth
$892,997.00
38,700.381 LINK
0.1988%
43
Bybit
LINK-USDC$23.08
0.0073655 Eth
$880,195.00
35,888.965 LINK
0.1843%
44
Binance
LINK-EUR$23.18
0.0073942 Eth
$877,904.00
35,842.650 LINK
0.1841%
45
Bitstamp
LINK-EUR$23.06
0.0073695 Eth
$832,032.00
36,084.857 LINK
0.1853%
46
BitStorage
LINK-USDT$23.06
0.0073540 Eth
$822,751.00
35,684.600 LINK
0.1833%
47
WhiteBIT
LINK-TRY$23.26
0.0074285 Eth
$803,393.00
34,532.830 LINK
0.1774%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.15
0.0073925 Eth
$792,643.00
33,245.440 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1708%
49
Azbit
LINK-ETH$23.09
0.0073621 Eth
$741,288.00
31,138.457 LINK
0.1599%
50
Trubit
LINK-USDT$23.02
0.0073409 Eth
$733,409.00
29,783.800 LINK
0.1530%
51
Coinbase Exchange
LINK-BTC$23.03
0.0073601 Eth
$621,089.00
26,969.250 LINK
0.1385%
52
QMall
LINK-USDC$23.06
0.0073668 Eth
$589,996.00
24,040.214 LINK
0.1235%
53
Gemini
LINK-USD$23.05
0.0073682 Eth
$538,412.00
23,354.712 LINK
0.1200%
54
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$22.95
0.0073287 Eth
$523,673.00
21,493.956 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1104%
55
WhiteBIT
LINK-BTC$23.10
0.0073753 Eth
$508,874.00
22,031.050 LINK
0.1132%
56
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$22.87
0.0073031 Eth
$490,470.00
20,715.679 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1064%
57
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.07
0.0073697 Eth
$469,071.00
19,670.883 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1010%
58
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.01
0.0073541 Eth
$455,189.00
488,279.266 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.5079%
59
LATOKEN
LINK-BTC$23.05
0.0073613 Eth
$451,943.00
19,609.286 LINK
0.1007%
60
BigONE
LINK-USDT$23.04
0.0073502 Eth
$442,509.00
19,204.090 LINK
0.0986%
61
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.01
0.0073488 Eth
$441,099.00
18,973.446 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0975%
62
Coinbase Exchange
LINK-USDT$23.04
0.0073460 Eth
$435,724.00
18,914.479 LINK
0.0971%
63
HashKey Exchange
LINK-USD$23.19
0.0074003 Eth
$427,592.00
17,380.580 LINK
0.0893%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.10
0.0073766 Eth
$399,988.00
16,788.582 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0862%
65
OKX
LINK-USDC$23.02
0.0073521 Eth
$384,689.00
15,546.959 LINK
0.0799%
66
itBit
LINK-USD$23.09
0.0073794 Eth
$352,627.00
15,271.859 LINK
0.0784%
67
WhiteBIT
LINK-EUR$23.09
0.0073718 Eth
$327,256.00
14,170.660 LINK
0.0728%
68
GMO Japan
LINK-JPY$23.14
0.0073551 Eth
$303,347.00
13,110.000 LINK
0.0673%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.02
0.0073524 Eth
$300,910.00
12,081.932 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0621%
70
BitMart
LINK-BTC$23.01
0.0073547 Eth
$256,300.00
11,137.980 LINK
0.0572%
71
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.96
0.0073318 Eth
$254,995.00
10,316.727 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0530%
72
Slex
LINK-ETH$23.04
0.0073502 Eth
$250,687.00
10,513.000 LINK
0.0540%
73
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$22.99
0.0073374 Eth
$211,437.00
19,783.221 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1016%
74
BitStorage
LINK-ETH$23.16
0.0073679 Eth
$210,405.00
9,086.390 LINK
0.0467%
75
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.13
0.0073531 Eth
$198,383.00
8,422.199 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0433%
76
PointPay
LINK-BTC$23.13
0.0073553 Eth
$180,835.00
7,442.905 LINK
0.0382%
77
Bitci TR
LINK-TRY$23.33
0.0074367 Eth
$164,010.00
6,652.310 LINK
0.0342%
78
Coinbase Exchange
LINK-ETH$23.06
0.0073606 Eth
$146,981.00
6,373.760 LINK
0.0327%
79
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.09
0.0073744 Eth
$138,666.00
5,599.669 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0288%
80
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$22.99
0.0073465 Eth
$116,724.00
4,915.761 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0252%
81
KuCoin
LINK-USDC$23.20
0.0073724 Eth
$113,026.00
4,872.835 LINK
0.0250%
82
Hotcoin
LINK-BTC$23.14
0.0073578 Eth
$104,654.00
4,521.920 LINK
0.0232%
83
Bitkub
LINK-THB$23.26
0.0074210 Eth
$97,780.00
4,203.019 LINK
0.0216%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$22.98
0.0073405 Eth
$97,227.00
103,460.024 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5314%
85
EXMO
LINK-BTC$23.08
0.0073755 Eth
$91,709.00
3,973.920 LINK
0.0204%
86
Binance US
LINK-USDT$23.05
0.0073610 Eth
$90,716.00
3,936.203 LINK
0.0202%
87
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.05
0.0073534 Eth
$83,840.00
89,818.558 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4613%
88
BitMart
LINK-ETH$23.06
0.0073704 Eth
$81,819.00
3,548.000 LINK
0.0182%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.25
0.0073899 Eth
$78,395.00
3,228.630 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0166%
90
Bitso
LINK-USD$23.00
0.0073506 Eth
$68,020.00
2,957.391 LINK
0.0152%
91
Gemini
LINK-BTC$23.05
0.0073617 Eth
$67,897.00
2,945.824 LINK
0.0151%
92
Kanga
LINK-PLN$23.18
0.0074029 Eth
$47,047.00
0.000 LINK
0.0000%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.12
0.0073894 Eth
$43,520.00
1,799.968 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0092%
94
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.00
0.0073393 Eth
$39,853.00
1,633.798 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0084%
95
Mercado Bitcoin
LINK-BRL$23.29
0.0074437 Eth
$35,502.00
1,524.241 LINK
0.0078%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.18
0.0073926 Eth
$34,592.00
1,441.625 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0074%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.25
0.0074156 Eth
$34,021.00
1,382.260 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0071%
98
Hotcoin
LINK-ETH$23.13
0.0073780 Eth
$31,514.00
1,362.200 LINK
0.0070%
99
Dex-Trade
LINK-ETH$23.11
0.0073715 Eth
$30,599.00
1,323.800 LINK
0.0068%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.05
0.0073525 Eth
$29,859.00
1,211.927 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0062%

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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