ETH Price: $1,589.71 (-3.50%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

752,422 ( 0.018%)

Market

Price

$12.62 @ 0.007939 ETH (-4.35%)

Onchain Market Cap

$12,620,000,000.00

Circulating Supply Market Cap

$8,064,190,965.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x119b64798b51dd67c8a66374630d2005ed3512c0
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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 11372.73% |ETH 0.0003846 1964.22%

Market

Volume (24H):$363,084,450.00
Market Capitalization:$8,064,190,965.00
Circulating Supply:638,099,971.00 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$12.61
0.0078963 Eth
$38,760,487.00
3,002,744.390 LINK
17.6739%
2
MEXC
LINK-USDT$12.61
0.0079083 Eth
$14,484,689.00
1,148,940.270 LINK
6.7626%
3
Coinbase Exchange
LINK-USD$12.61
0.0079162 Eth
$14,017,758.00
1,111,461.970 LINK
6.5420%
4
HTX
LINK-USDT$12.61
0.0079161 Eth
$10,472,447.00
809,920.057 LINK
4.7671%
5
KuCoin
LINK-USDT$12.61
0.0079168 Eth
$7,786,714.00
617,568.159 LINK
3.6350%
6
P2B
LINK-USDT$12.60
0.0079094 Eth
$7,737,213.00
614,216.920 LINK
3.6152%
7
Slex
LINK-USDT$12.62
0.0079152 Eth
$7,697,101.00
593,672.000 LINK
3.4943%
8
Binance
LINK-USDC$12.57
0.0078840 Eth
$7,536,602.00
584,995.160 LINK
3.4432%
9
OKX
LINK-USDT$12.61
0.0079184 Eth
$7,208,060.00
557,291.298 LINK
3.2802%
10
WhiteBIT
LINK-USDT$12.57
0.0078929 Eth
$6,767,845.00
538,289.470 LINK
3.1683%
11
Bybit
LINK-USDT$12.61
0.0079165 Eth
$6,765,861.00
524,749.505 LINK
3.0886%
12
CoinW
LINK-USDT$12.60
0.0079111 Eth
$6,245,305.00
495,620.730 LINK
2.9172%
13
Bitget
LINK-USDT$12.61
0.0079165 Eth
$6,201,964.00
480,677.635 LINK
2.8292%
14
Gate.io
LINK-USDT$12.62
0.0079213 Eth
$6,190,294.00
480,038.420 LINK
2.8255%
15
Binance
LINK-FDUSD$12.54
0.0078277 Eth
$5,912,476.00
461,216.620 LINK
2.7147%
16
Hotcoin
LINK-USDT$12.59
0.0079059 Eth
$5,011,079.00
398,008.970 LINK
2.3427%
17
DigiFinex
LINK-USDT$12.61
0.0079173 Eth
$4,925,933.00
390,611.790 LINK
2.2991%
18
MEXC
LINK-EUR$12.63
0.0079209 Eth
$3,878,727.00
307,163.580 LINK
1.8079%
19
XT.COM
LINK-USDT$12.58
0.0078901 Eth
$3,874,831.00
300,237.070 LINK
1.7672%
20
Coinstore
LINK-USDT$12.59
0.0078952 Eth
$3,773,259.00
292,473.440 LINK
1.7215%
21
MEXC
LINK-USDC$12.60
0.0079092 Eth
$3,441,639.00
273,126.080 LINK
1.6076%
22
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.58
0.0078965 Eth
$2,584,811.00
202,909.941 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.1943%
23
Azbit
LINK-USDT$12.63
0.0079269 Eth
$2,342,263.00
181,417.259 LINK
1.0678%
24
Kraken
LINK-USD$12.62
0.0079261 Eth
$2,163,619.00
171,396.922 LINK
1.0088%
25
AscendEX (BitMax)
LINK-USDT$12.61
0.0079165 Eth
$1,732,101.00
137,341.500 LINK
0.8084%
26
Hibt
LINK-USDT$12.61
0.0079154 Eth
$1,618,088.00
125,120.601 LINK
0.7365%
27
Bitvavo
LINK-EUR$12.60
0.0079080 Eth
$1,603,912.00
127,302.303 LINK
0.7493%
28
QMall
LINK-USDT$12.59
0.0079012 Eth
$1,587,731.00
123,107.983 LINK
0.7246%
29
Biconomy.com
LINK-USDT$12.60
0.0079085 Eth
$1,390,839.00
107,333.500 LINK
0.6318%
30
FMCPAY
LINK-USDT$12.61
0.0079165 Eth
$1,295,429.00
100,290.744 LINK
0.5903%
31
Dcoin
LINK-USDT$12.64
0.0079264 Eth
$1,231,239.00
97,441.000 LINK
0.5735%
32
Dex-Trade
LINK-USDT$12.77
0.0079336 Eth
$1,226,952.00
96,100.130 LINK
0.5656%
33
Coinbase Exchange
LINK-EUR$12.60
0.0079028 Eth
$1,081,476.00
85,844.350 LINK
0.5053%
34
Tapbit
LINK-USDT$12.62
0.0079196 Eth
$1,040,834.00
80,377.660 LINK
0.4731%
35
FMCPAY
LINK-ETH$12.62
0.0079167 Eth
$958,818.00
74,991.520 LINK
0.4414%
36
LATOKEN
LINK-USDT$12.63
0.0079215 Eth
$844,647.00
66,887.036 LINK
0.3937%
37
WhiteBIT
LINK-USDC$12.60
0.0079082 Eth
$777,450.00
61,716.160 LINK
0.3633%
38
Binance
LINK-ETH$12.58
0.0078963 Eth
$731,489.00
57,386.710 LINK
0.3378%
39
FMCPAY
LINK-BTC$12.61
0.0079180 Eth
$697,703.00
54,659.300 LINK
0.3217%
40
CoinEx
LINK-USDT$12.60
0.0079111 Eth
$684,152.00
52,977.139 LINK
0.3118%
41
Coinbase Exchange
LINK-GBP$12.60
0.0079046 Eth
$614,777.00
48,788.510 LINK
0.2872%
42
QMall
LINK-USDC$12.59
0.0079040 Eth
$582,047.00
45,152.675 LINK
0.2658%
43
WhiteBIT
LINK-TRY$12.63
0.0079310 Eth
$580,146.00
45,924.450 LINK
0.2703%
44
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.53
0.0078657 Eth
$537,158.00
42,402.797 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2496%
45
BigONE
LINK-USDT$12.57
0.0078911 Eth
$518,126.00
41,226.830 LINK
0.2427%
46
tanX
LINK-USDC$12.59
0.0078997 Eth
$513,717.00
39,634.010 LINK
0.2333%
47
WhiteBIT
LINK-BTC$12.61
0.0079049 Eth
$430,391.00
34,141.970 LINK
0.2010%
48
Coinbase Exchange
LINK-BTC$12.58
0.0078987 Eth
$395,832.00
31,456.660 LINK
0.1852%
49
EXMO
LINK-USDT$12.61
0.0079192 Eth
$372,511.00
29,535.168 LINK
0.1738%
50
Bybit
LINK-USDC$12.61
0.0079168 Eth
$352,291.00
27,455.732 LINK
0.1616%
51
EarnBIT
LINK-USDT$12.61
0.0079182 Eth
$335,508.00
25,920.251 LINK
0.1526%
52
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.58
0.0078960 Eth
$310,337.00
24,395.922 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1436%
53
BitStorage
LINK-USDT$12.60
0.0079010 Eth
$309,430.00
24,558.160 LINK
0.1445%
54
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.54
0.0078717 Eth
$282,602.00
22,320.530 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1314%
55
BitMart
LINK-BTC$12.60
0.0079106 Eth
$275,899.00
21,896.420 LINK
0.1289%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.57
0.0078898 Eth
$245,674.00
19,332.340 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1138%
57
Slex
LINK-ETH$12.59
0.0079038 Eth
$213,598.00
16,756.050 LINK
0.0986%
58
XT.COM
LINK-ETH$12.61
0.0079193 Eth
$205,482.00
16,087.870 LINK
0.0947%
59
LATOKEN
LINK-BTC$12.63
0.0079258 Eth
$193,276.00
15,305.968 LINK
0.0901%
60
itBit
LINK-USD$12.61
0.0079154 Eth
$192,850.00
15,293.432 LINK
0.0900%
61
BitStorage
LINK-ETH$12.57
0.0078874 Eth
$184,110.00
14,651.190 LINK
0.0862%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.59
0.0079077 Eth
$169,271.00
13,124.879 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0773%
63
Bitbank
LINK-JPY$12.55
0.0078801 Eth
$166,412.00
13,256.003 LINK
0.0780%
64
Gemini
LINK-USD$12.58
0.0078969 Eth
$155,258.00
12,343.223 LINK
0.0727%
65
BYDFi
LINK-USDC$12.57
0.0078887 Eth
$144,876.00
11,526.890 LINK
0.0678%
66
Hotcoin
LINK-BTC$12.67
0.0079058 Eth
$144,749.00
11,425.800 LINK
0.0673%
67
GMO Japan
LINK-JPY$12.58
0.0078975 Eth
$143,766.00
11,426.100 LINK
0.0673%
68
OKX
LINK-USDC$12.57
0.0078929 Eth
$126,534.00
9,855.456 LINK
0.0580%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.59
0.0079077 Eth
$125,140.00
9,795.644 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0577%
70
BitMart
LINK-ETH$12.59
0.0079021 Eth
$101,656.00
8,076.440 LINK
0.0475%
71
Binance US
LINK-USDT$12.63
0.0079252 Eth
$99,085.00
7,847.414 LINK
0.0462%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.60
0.0079084 Eth
$98,990.00
7,756.083 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0457%
73
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.60
0.0079086 Eth
$86,767.00
6,842.658 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0403%
74
WhiteBIT
LINK-EUR$12.55
0.0078781 Eth
$75,637.00
6,027.610 LINK
0.0355%
75
HashKey Global
LINK-USDT$12.60
0.0079116 Eth
$75,576.00
5,909.354 LINK
0.0348%
76
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.59
0.0079077 Eth
$70,649.00
72,376.622 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4260%
77
Tokenize
LINK-ETH$12.57
0.0078911 Eth
$68,743.00
5,467.972 LINK
0.0322%
78
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$12.64
0.0079355 Eth
$65,604.00
5,071.507 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0299%
79
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.53
0.0078657 Eth
$65,114.00
66,511.545 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3915%
80
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$12.59
0.0079051 Eth
$48,910.00
3,877.784 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0228%
81
Gate.io
LINK-ETH$12.59
0.0079047 Eth
$48,802.00
3,834.748 LINK
0.0226%
82
Gate.io
LINK-TRY$12.68
0.0079558 Eth
$45,987.00
3,526.058 LINK
0.0208%
83
Backpack Exchange
LINK-USDC$12.60
0.0079120 Eth
$41,884.00
3,225.096 LINK
0.0190%
84
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.59
0.0079079 Eth
$39,931.00
3,149.562 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0185%
85
OKX
LINK-EUR$12.57
0.0078944 Eth
$39,662.00
3,088.230 LINK
0.0182%
86
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.54
0.0078764 Eth
$32,149.00
2,498.301 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0147%
87
Mercado Bitcoin
LINK-BRL$12.65
0.0079419 Eth
$30,359.00
2,399.511 LINK
0.0141%
88
Bittime
LINK-USDT$12.53
0.0078699 Eth
$30,306.00
2,346.310 LINK
0.0138%
89
Bittime
LINK-IDR$12.67
0.0079458 Eth
$30,246.00
2,325.470 LINK
0.0137%
90
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.60
0.0079082 Eth
$26,149.00
26,833.848 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1579%
91
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.60
0.0079094 Eth
$24,955.00
1,954.859 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0115%
92
Dex-Trade
LINK-ETH$12.61
0.0079154 Eth
$24,706.00
1,959.250 LINK
0.0115%
93
Aerodrome SlipStream
0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196-0X4200000000000000000000000000000000000006$12.70
0.0079756 Eth
$22,317.00
1,751.942 0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196
0.0103%
94
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.59
0.0079035 Eth
$22,272.00
22,828.085 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1344%
95
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$12.41
0.0077921 Eth
$16,771.30
1,339.860 0X5947BB275C521040051D82396192181B413227A3
0.0079%
96
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$12.61
0.0079143 Eth
$13,751.17
14,019.686 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0825%
97
Uniswap V4 (Ethereum)
0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A-0X514910771AF9CA656AF840DFF83E8264ECF986CA$12.61
0.0079152 Eth
$12,215.89
12,494.354 0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A
0.0735%
98
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$12.51
0.0078520 Eth
$10,397.12
823.854 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0048%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.57
0.0078938 Eth
$7,234.59
570.848 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0034%
100
Bitexen
LINK-TRY$12.68
0.0079593 Eth
$3,952.44
311.659 LINK
0.0018%

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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