ETH Price: $1,870.44 (+0.05%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

745,803 ( 0.020%)

Market

Price

$13.06 @ 0.006982 ETH (+0.56%)

Onchain Market Cap

$13,060,000,000.00

Circulating Supply Market Cap

$8,337,056,611.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
KuCoin Dep: 0x9176d8C40b3c22ea0c45A461ab1Edc684de1A1CA
Balance
0 LINK

Value
$0.00
0x9176d8c40b3c22ea0c45a461ab1edc684de1a1ca
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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 11772.73% |ETH 0.0003846 1715.39%

Market

Volume (24H):$504,043,542.00
Market Capitalization:$8,337,056,611.00
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$12.96
0.0069340 Eth
$60,486,792.00
4,568,880.770 LINK
19.7948%
2
Coinbase Exchange
LINK-USD$13.05
0.0069552 Eth
$35,627,016.00
2,730,876.620 LINK
11.8316%
3
MEXC
LINK-USDT$13.09
0.0069787 Eth
$23,134,310.00
1,767,812.110 LINK
7.6591%
4
P2B
LINK-USDT$12.99
0.0069419 Eth
$12,155,011.00
935,860.220 LINK
4.0546%
5
Ourbit
LINK-USDT$13.06
0.0069789 Eth
$9,745,585.00
735,086.770 LINK
3.1848%
6
Gate.io
LINK-USDT$13.05
0.0069618 Eth
$9,680,366.00
729,282.400 LINK
3.1596%
7
OKX
LINK-USDT$12.98
0.0069503 Eth
$8,634,911.00
651,739.290 LINK
2.8237%
8
Binance
LINK-USDC$13.08
0.0069896 Eth
$8,205,932.00
619,612.800 LINK
2.6845%
9
Slex
LINK-USDT$13.10
0.0069833 Eth
$7,784,144.00
586,548.090 LINK
2.5412%
10
HTX
LINK-USDT$12.99
0.0069404 Eth
$7,734,444.00
583,936.224 LINK
2.5299%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$13.05
0.0069559 Eth
$7,211,865.00
546,315.752 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.3669%
12
Bybit
LINK-USDT$12.98
0.0069410 Eth
$6,869,537.00
518,041.490 LINK
2.2444%
13
LBank
LINK-USDT$13.08
0.0069784 Eth
$6,462,052.00
494,145.140 LINK
2.1409%
14
MEXC
LINK-EUR$13.12
0.0069927 Eth
$6,150,266.00
468,938.940 LINK
2.0317%
15
XT.COM
LINK-USDT$13.09
0.0069745 Eth
$6,091,394.00
459,474.680 LINK
1.9907%
16
MEXC
LINK-USDC$13.10
0.0069820 Eth
$5,637,099.00
430,466.010 LINK
1.8650%
17
Binance
LINK-FDUSD$13.04
0.0069508 Eth
$5,582,848.00
421,846.370 LINK
1.8277%
18
Coinstore
LINK-USDT$13.11
0.0069791 Eth
$5,259,332.00
396,873.750 LINK
1.7195%
19
Bitget
LINK-USDT$12.97
0.0069393 Eth
$5,118,581.00
386,924.000 LINK
1.6764%
20
KuCoin
LINK-USDT$13.00
0.0069324 Eth
$4,879,285.00
375,399.659 LINK
1.6264%
21
Hotcoin
LINK-USDT$13.05
0.0069629 Eth
$4,676,489.00
358,222.660 LINK
1.5520%
22
CoinW
LINK-USDT$13.12
0.0069863 Eth
$4,445,027.00
338,764.040 LINK
1.4677%
23
Azbit
LINK-USDT$13.08
0.0069635 Eth
$3,609,142.00
272,231.406 LINK
1.1795%
24
Bitunix
LINK-USDT$13.04
0.0069508 Eth
$3,315,679.00
254,316.620 LINK
1.1018%
25
Bitvavo
LINK-EUR$13.12
0.0069831 Eth
$3,005,680.00
229,173.906 LINK
0.9929%
26
QMall
LINK-USDT$13.11
0.0069795 Eth
$2,422,075.00
182,557.786 LINK
0.7909%
27
BTSE
LINK-USDT$12.98
0.0069408 Eth
$2,001,197.00
154,210.641 LINK
0.6681%
28
WhiteBIT
LINK-USDT$13.08
0.0069631 Eth
$1,997,880.00
152,787.860 LINK
0.6620%
29
Dex-Trade
LINK-USDT$13.11
0.0069784 Eth
$1,951,862.00
148,924.180 LINK
0.6452%
30
AscendEX (BitMax)
LINK-USDT$13.03
0.0069512 Eth
$1,716,804.00
131,729.800 LINK
0.5707%
31
FMCPAY
LINK-USDT$13.08
0.0069705 Eth
$1,706,744.00
128,899.618 LINK
0.5585%
32
Hibt
LINK-USDT$13.03
0.0069506 Eth
$1,677,288.00
126,515.573 LINK
0.5481%
33
Dcoin
LINK-USDT$13.10
0.0069798 Eth
$1,626,624.00
124,133.000 LINK
0.5378%
34
Coinbase Exchange
LINK-EUR$13.00
0.0069461 Eth
$1,573,874.00
121,105.490 LINK
0.5247%
35
Biconomy.com
LINK-USDT$13.10
0.0069853 Eth
$1,302,655.00
98,146.020 LINK
0.4252%
36
FMCPAY
LINK-ETH$13.07
0.0069696 Eth
$1,236,023.00
93,677.280 LINK
0.4059%
37
Binance
LINK-ETH$13.10
0.0069735 Eth
$1,011,654.00
76,539.420 LINK
0.3316%
38
LATOKEN
LINK-BTC$13.07
0.0069745 Eth
$1,011,110.00
77,344.067 LINK
0.3351%
39
Coinbase Exchange
LINK-GBP$13.00
0.0069457 Eth
$947,058.00
72,878.600 LINK
0.3157%
40
FMCPAY
LINK-BTC$13.07
0.0069675 Eth
$919,166.00
70,577.700 LINK
0.3058%
41
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$13.03
0.0069485 Eth
$848,742.00
64,511.685 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2795%
42
EXMO
LINK-USDT$12.98
0.0069385 Eth
$667,973.00
51,455.453 LINK
0.2229%
43
Phemex
LINK-USDT$13.10
0.0069902 Eth
$626,946.00
47,860.810 LINK
0.2074%
44
CoinEx
LINK-USDT$13.07
0.0069709 Eth
$616,790.00
46,454.413 LINK
0.2013%
45
QMall
LINK-USDC$13.09
0.0069684 Eth
$606,875.00
45,763.267 LINK
0.1983%
46
tanX
LINK-USDC$13.08
0.0069779 Eth
$544,853.00
41,015.510 LINK
0.1777%
47
Binance
LINK-EUR$13.08
0.0069715 Eth
$522,320.00
39,480.840 LINK
0.1711%
48
Gemini
LINK-USD$13.03
0.0069691 Eth
$493,263.00
37,855.913 LINK
0.1640%
49
BigONE
LINK-USDT$13.04
0.0069320 Eth
$478,642.00
36,718.160 LINK
0.1591%
50
BitStorage
LINK-USDT$13.02
0.0069431 Eth
$476,675.00
36,617.810 LINK
0.1586%
51
Bybit
LINK-USDC$13.01
0.0069559 Eth
$471,408.00
35,546.569 LINK
0.1540%
52
Binance
LINK-TRY$13.01
0.0069601 Eth
$425,909.00
32,050.210 LINK
0.1389%
53
EarnBIT
LINK-USDT$13.03
0.0069463 Eth
$403,593.00
30,494.608 LINK
0.1321%
54
WhiteBIT
LINK-TRY$13.09
0.0069735 Eth
$326,269.00
24,928.330 LINK
0.1080%
55
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$13.10
0.0070000 Eth
$322,656.00
24,074.379 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1043%
56
BitMart
LINK-BTC$13.04
0.0069675 Eth
$315,896.00
24,232.620 LINK
0.1050%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.11
0.0070072 Eth
$293,087.00
22,088.428 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0957%
58
XT.COM
LINK-ETH$13.09
0.0069697 Eth
$283,206.00
21,423.230 LINK
0.0928%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.06
0.0069823 Eth
$280,492.00
21,238.348 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0920%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$13.11
0.0070072 Eth
$277,021.00
20,926.040 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0907%
61
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.12
0.0069963 Eth
$260,929.00
19,733.814 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0855%
62
BitStorage
LINK-ETH$13.05
0.0069760 Eth
$244,796.00
18,755.860 LINK
0.0813%
63
Bitso
LINK-USD$13.11
0.0069830 Eth
$225,449.00
17,196.706 LINK
0.0745%
64
BitDelta
LINK-USDT$13.05
0.0069629 Eth
$221,412.00
16,709.000 LINK
0.0724%
65
Coinbase Exchange
LINK-USDT$13.09
0.0069999 Eth
$219,942.00
16,805.474 LINK
0.0728%
66
Bitbank
LINK-JPY$13.17
0.0070168 Eth
$217,509.00
16,511.174 LINK
0.0715%
67
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$13.07
0.0069853 Eth
$216,496.00
16,530.872 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0716%
68
Slex
LINK-ETH$13.08
0.0069748 Eth
$215,474.00
16,291.510 LINK
0.0706%
69
Bitbegin
LINK-USDT$13.10
0.0069814 Eth
$188,407.00
14,196.674 LINK
0.0615%
70
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$13.07
0.0069675 Eth
$173,298.00
13,132.263 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0569%
71
CoinTR
LINK-TRY$13.08
0.0069732 Eth
$172,343.00
12,976.490 LINK
0.0562%
72
OKX
LINK-USDC$12.98
0.0069475 Eth
$168,933.00
12,774.692 LINK
0.0553%
73
WhiteBIT
LINK-BTC$13.05
0.0069615 Eth
$164,147.00
12,576.150 LINK
0.0545%
74
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$13.11
0.0070072 Eth
$142,449.00
144,203.596 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6248%
75
GMO Japan
LINK-JPY$13.22
0.0070536 Eth
$139,914.00
10,579.700 LINK
0.0458%
76
Hotcoin
LINK-BTC$13.06
0.0069654 Eth
$138,104.00
10,574.910 LINK
0.0458%
77
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$13.12
0.0069932 Eth
$129,968.00
9,807.536 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0425%
78
bitcastle
LINK-USDT$13.08
0.0069705 Eth
$122,475.00
9,234.920 LINK
0.0400%
79
Binance
LINK-BNB$13.17
0.0070227 Eth
$117,678.00
8,833.239 LINK
0.0383%
80
WhiteBIT
LINK-EUR$13.09
0.0069721 Eth
$116,383.00
8,888.860 LINK
0.0385%
81
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$13.07
0.0069681 Eth
$108,709.00
109,935.212 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4763%
82
Coinbase Exchange
LINK-ETH$13.14
0.0070084 Eth
$100,558.00
7,652.390 LINK
0.0332%
83
PointPay
LINK-BTC$13.07
0.0069679 Eth
$95,006.00
7,291.711 LINK
0.0316%
84
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$13.03
0.0069503 Eth
$91,478.00
6,958.643 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0301%
85
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.08
0.0069757 Eth
$86,363.00
6,536.996 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0283%
86
Tokenize
LINK-ETH$13.01
0.0069426 Eth
$71,626.00
5,506.851 LINK
0.0239%
87
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$13.06
0.0069788 Eth
$71,258.00
5,478.000 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0237%
88
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$13.13
0.0070217 Eth
$64,517.00
4,827.795 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0209%
89
Uniswap V3 (Ethereum)
0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23-0X514910771AF9CA656AF840DFF83E8264ECF986CA$13.05
0.0069629 Eth
$55,822.00
129,430.151 0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23
0.5608%
90
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$13.05
0.0069597 Eth
$42,629.00
43,285.278 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1875%
91
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$13.04
0.0069551 Eth
$40,132.00
3,088.247 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0134%
92
Bitexen
LINK-TRY$12.92
0.0068973 Eth
$38,251.00
2,960.800 LINK
0.0128%
93
Dex-Trade
LINK-ETH$13.05
0.0069807 Eth
$31,870.00
2,441.850 LINK
0.0106%
94
Hotcoin
LINK-ETH$13.10
0.0069736 Eth
$31,380.00
2,395.890 LINK
0.0104%
95
Bittime
LINK-USDT$13.09
0.0069795 Eth
$31,263.00
2,354.820 LINK
0.0102%
96
Binance US
LINK-USDT$13.10
0.0069827 Eth
$30,953.00
2,363.261 LINK
0.0102%
97
Bittime
LINK-IDR$13.13
0.0070008 Eth
$30,632.00
2,294.990 LINK
0.0099%
98
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$13.11
0.0070057 Eth
$26,214.00
1,986.654 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0086%
99
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$13.04
0.0069554 Eth
$18,514.23
1,411.463 0X5947BB275C521040051D82396192181B413227A3
0.0061%
100
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$13.01
0.0069372 Eth
$15,142.63
1,146.590 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0050%

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

API
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Deployed Bytecode

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Swarm Source

bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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