ETH Price: $3,105.81 (-5.89%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

732,942 ( 0.049%)

Market

Price

$22.96 @ 0.007393 ETH (-8.42%)

Onchain Market Cap

$22,960,000,000.00

Circulating Supply Market Cap

$14,656,321,126.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
3.5765621 LINK

Value
$82.12 ( ~0.0264407635318131 Eth) [0.0000%]
0x0dd0AF69e22440b6c6a07a0065583911a57C9B20
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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 20772.73% |ETH 0.0003846 1822.26%

Market

Volume (24H):$799,416,163.00
Market Capitalization:$14,656,321,126.00
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$22.82
0.0073195 Eth
$110,515,882.00
4,476,188.400 LINK
22.8153%
2
Coinbase Exchange
LINK-USD$22.84
0.0073252 Eth
$46,111,471.00
2,018,714.270 LINK
10.2895%
3
Bybit
LINK-USDT$23.08
0.0073594 Eth
$33,266,406.00
1,349,221.494 LINK
6.8770%
4
P2B
LINK-USDT$23.06
0.0073358 Eth
$21,653,313.00
939,143.630 LINK
4.7869%
5
OKX
LINK-USDT$22.87
0.0073322 Eth
$19,791,911.00
805,458.585 LINK
4.1055%
6
Slex
LINK-USDT$22.88
0.0073307 Eth
$17,507,220.00
708,023.940 LINK
3.6088%
7
HTX
LINK-USDT$23.03
0.0073561 Eth
$13,494,738.00
544,756.031 LINK
2.7766%
8
DigiFinex
LINK-USDT$23.00
0.0073525 Eth
$13,408,012.00
582,842.480 LINK
2.9708%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$22.98
0.0073655 Eth
$13,083,974.00
552,943.781 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.8184%
10
XT.COM
LINK-USDT$22.84
0.0073286 Eth
$11,042,905.00
447,059.380 LINK
2.2787%
11
Azbit
LINK-USDT$22.86
0.0073361 Eth
$10,896,371.00
441,116.679 LINK
2.2484%
12
Coinstore
LINK-USDT$22.90
0.0073216 Eth
$9,945,527.00
402,482.410 LINK
2.0515%
13
MEXC
LINK-USDT$22.87
0.0073326 Eth
$9,520,494.00
416,209.920 LINK
2.1214%
14
KuCoin
LINK-USDT$23.12
0.0073751 Eth
$8,853,973.00
383,036.917 LINK
1.9524%
15
Bitunix
LINK-USDT$23.00
0.0073467 Eth
$8,131,436.00
353,441.220 LINK
1.8015%
16
Binance
LINK-USDC$23.04
0.0073530 Eth
$7,111,539.00
290,213.810 LINK
1.4792%
17
Binance
LINK-FDUSD$22.81
0.0073099 Eth
$6,942,867.00
283,490.830 LINK
1.4450%
18
CoinW
LINK-USDT$22.93
0.0073487 Eth
$6,464,515.00
281,954.450 LINK
1.4371%
19
BYDFi
LINK-USDT$22.87
0.0073310 Eth
$5,709,159.00
249,644.700 LINK
1.2725%
20
Kraken
LINK-USD$23.02
0.0073406 Eth
$5,671,858.00
246,341.273 LINK
1.2556%
21
BTSE
LINK-USDT$22.83
0.0073241 Eth
$5,595,467.00
245,072.575 LINK
1.2491%
22
LATOKEN
LINK-USDT$22.90
0.0073217 Eth
$5,114,341.00
223,349.537 LINK
1.1384%
23
LBank
LINK-USDT$23.01
0.0073484 Eth
$4,978,980.00
216,410.860 LINK
1.1031%
24
QMall
LINK-USDT$23.06
0.0073645 Eth
$4,464,250.00
180,040.325 LINK
0.9177%
25
FMCPAY
LINK-USDT$22.90
0.0073265 Eth
$4,412,712.00
180,009.044 LINK
0.9175%
26
Bitvavo
LINK-EUR$23.17
0.0073895 Eth
$3,826,379.00
165,139.259 LINK
0.8417%
27
Coinbase Exchange
LINK-EUR$23.01
0.0073516 Eth
$3,752,812.00
163,124.260 LINK
0.8315%
28
Dex-Trade
LINK-USDT$22.93
0.0073323 Eth
$3,319,052.00
144,758.960 LINK
0.7378%
29
Hotcoin
LINK-USDT$22.82
0.0073222 Eth
$2,949,118.00
129,210.500 LINK
0.6586%
30
CoinEx
LINK-USDT$22.91
0.0073399 Eth
$2,086,887.00
85,867.790 LINK
0.4377%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.02
0.0073573 Eth
$1,981,162.00
83,863.312 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4275%
32
PointPay
LINK-USDT$22.82
0.0073270 Eth
$1,755,366.00
71,118.157 LINK
0.3625%
33
FMCPAY
LINK-BTC$23.15
0.0073588 Eth
$1,741,641.00
71,396.300 LINK
0.3639%
34
FMCPAY
LINK-ETH$23.15
0.0073731 Eth
$1,708,497.00
71,398.880 LINK
0.3639%
35
Coinbase Exchange
LINK-GBP$22.87
0.0073304 Eth
$1,535,526.00
67,149.030 LINK
0.3423%
36
EXMO
LINK-USDT$22.84
0.0073261 Eth
$1,112,542.00
48,718.289 LINK
0.2483%
37
tanX
LINK-USDC$23.06
0.0073499 Eth
$1,108,855.00
45,083.470 LINK
0.2298%
38
Phemex
LINK-USDT$22.86
0.0073324 Eth
$1,076,280.00
47,072.310 LINK
0.2399%
39
Binance
LINK-TRY$23.32
0.0074380 Eth
$1,013,706.00
40,860.410 LINK
0.2083%
40
Bitstamp
LINK-USD$22.84
0.0073326 Eth
$962,578.00
42,144.396 LINK
0.2148%
41
EarnBIT
LINK-USDT$23.10
0.0073704 Eth
$919,645.00
37,318.762 LINK
0.1902%
42
Bitbank
LINK-JPY$22.91
0.0073480 Eth
$888,643.00
38,794.069 LINK
0.1977%
43
Binance
LINK-EUR$22.95
0.0073639 Eth
$880,160.00
35,972.850 LINK
0.1834%
44
Bybit
LINK-USDC$22.88
0.0073395 Eth
$877,542.00
35,809.545 LINK
0.1825%
45
Bitstamp
LINK-EUR$22.89
0.0073493 Eth
$846,446.00
36,975.839 LINK
0.1885%
46
BitStorage
LINK-USDT$23.06
0.0073540 Eth
$822,751.00
35,684.600 LINK
0.1819%
47
WhiteBIT
LINK-TRY$23.22
0.0074169 Eth
$803,577.00
34,612.830 LINK
0.1764%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.96
0.0073644 Eth
$781,756.00
33,052.123 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1685%
49
Azbit
LINK-ETH$23.09
0.0073621 Eth
$741,288.00
31,138.457 LINK
0.1587%
50
Trubit
LINK-USDT$22.83
0.0073210 Eth
$731,472.00
29,787.190 LINK
0.1518%
51
Coinbase Exchange
LINK-BTC$22.86
0.0073359 Eth
$634,694.00
27,765.650 LINK
0.1415%
52
QMall
LINK-USDC$22.92
0.0073440 Eth
$605,629.00
24,700.200 LINK
0.1259%
53
Gemini
LINK-USD$22.91
0.0073339 Eth
$543,777.00
23,738.764 LINK
0.1210%
54
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$22.89
0.0073412 Eth
$533,430.00
21,847.223 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1114%
55
WhiteBIT
LINK-BTC$22.94
0.0073516 Eth
$502,647.00
21,907.300 LINK
0.1117%
56
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$22.74
0.0072914 Eth
$487,935.00
20,724.738 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1056%
57
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.87
0.0073371 Eth
$468,147.00
19,711.469 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1005%
58
Coinbase Exchange
LINK-USDT$22.83
0.0073143 Eth
$456,112.00
19,982.760 LINK
0.1019%
59
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.90
0.0073408 Eth
$455,620.00
490,657.943 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.5009%
60
LATOKEN
LINK-BTC$22.97
0.0073428 Eth
$452,768.00
19,712.980 LINK
0.1005%
61
BigONE
LINK-USDT$23.04
0.0073502 Eth
$442,509.00
19,204.090 LINK
0.0979%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.85
0.0073301 Eth
$440,308.00
19,091.152 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0973%
63
HashKey Exchange
LINK-USD$23.19
0.0074003 Eth
$427,592.00
17,380.580 LINK
0.0886%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.13
0.0074060 Eth
$400,318.00
16,785.488 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0856%
65
OKX
LINK-USDC$23.02
0.0073521 Eth
$384,689.00
15,546.959 LINK
0.0792%
66
itBit
LINK-USD$23.01
0.0073529 Eth
$359,121.00
15,607.180 LINK
0.0796%
67
WhiteBIT
LINK-EUR$22.98
0.0073585 Eth
$324,450.00
14,116.280 LINK
0.0720%
68
GMO Japan
LINK-JPY$22.91
0.0073533 Eth
$301,518.00
13,159.200 LINK
0.0671%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$22.78
0.0073059 Eth
$291,263.00
11,719.261 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0597%
70
BitMart
LINK-BTC$22.91
0.0073431 Eth
$255,564.00
11,156.540 LINK
0.0569%
71
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.96
0.0073318 Eth
$254,995.00
10,316.727 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0526%
72
Slex
LINK-ETH$23.04
0.0073502 Eth
$250,687.00
10,513.000 LINK
0.0536%
73
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$22.99
0.0073374 Eth
$211,437.00
19,783.221 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1008%
74
BitStorage
LINK-ETH$23.16
0.0073679 Eth
$210,405.00
9,086.390 LINK
0.0463%
75
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$22.74
0.0072930 Eth
$194,566.00
8,347.009 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0425%
76
PointPay
LINK-BTC$22.86
0.0073287 Eth
$179,888.00
7,448.153 LINK
0.0380%
77
Bitci TR
LINK-TRY$23.33
0.0074367 Eth
$164,010.00
6,652.310 LINK
0.0339%
78
Coinbase Exchange
LINK-ETH$22.89
0.0073345 Eth
$146,561.00
6,401.950 LINK
0.0326%
79
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.96
0.0073651 Eth
$143,071.00
5,775.370 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0294%
80
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$22.87
0.0073324 Eth
$116,153.00
4,915.761 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0251%
81
KuCoin
LINK-USDC$22.93
0.0073314 Eth
$112,796.00
4,919.447 LINK
0.0251%
82
Hotcoin
LINK-BTC$22.86
0.0073317 Eth
$105,840.00
4,629.450 LINK
0.0236%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$22.89
0.0073412 Eth
$98,668.00
105,284.581 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5366%
84
Bitkub
LINK-THB$23.26
0.0074210 Eth
$97,780.00
4,203.019 LINK
0.0214%
85
Binance US
LINK-USDT$22.85
0.0073319 Eth
$93,155.00
4,076.063 LINK
0.0208%
86
EXMO
LINK-BTC$23.02
0.0073837 Eth
$92,024.00
3,997.953 LINK
0.0204%
87
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.05
0.0073534 Eth
$83,840.00
89,818.558 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4578%
88
BitMart
LINK-ETH$22.90
0.0073424 Eth
$81,176.00
3,544.040 LINK
0.0181%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$22.84
0.0073215 Eth
$79,818.00
3,319.742 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0169%
90
KuCoin
LINK-BTC$22.86
0.0073280 Eth
$73,152.00
3,199.999 LINK
0.0163%
91
Bitso
LINK-USD$23.00
0.0073497 Eth
$69,081.00
3,003.491 LINK
0.0153%
92
Gemini
LINK-BTC$23.05
0.0073617 Eth
$67,897.00
2,945.824 LINK
0.0150%
93
Kanga
LINK-PLN$23.17
0.0074035 Eth
$47,258.00
0.000 LINK
0.0000%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.12
0.0073894 Eth
$43,520.00
1,799.968 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0092%
95
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.00
0.0073393 Eth
$39,853.00
1,633.798 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0083%
96
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$22.46
0.0072063 Eth
$36,695.00
1,588.110 0X5947BB275C521040051D82396192181B413227A3
0.0081%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.25
0.0074156 Eth
$34,021.00
1,382.260 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0070%
98
Hotcoin
LINK-ETH$22.93
0.0073369 Eth
$31,729.00
1,383.600 LINK
0.0071%
99
Dex-Trade
LINK-ETH$23.11
0.0073715 Eth
$30,599.00
1,323.800 LINK
0.0067%
100
Ace
LINK-USDT$23.09
0.0073811 Eth
$4,391.20
177.510 LINK
0.0009%

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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