ETH Price: $3,344.85 (-1.04%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,390 ( 0.009%)

Market

Price

$21.34 @ 0.006380 ETH (-6.12%)

Onchain Market Cap

$21,340,000,000.00

Circulating Supply Market Cap

$13,465,840,180.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
qateam.eth
Balance
0.000000639457371712 LINK

Value
$0.00 ( ~0 Eth) [0.0000%]
0x7a618b048f61a3dcf8a1b9bc04a5384f6dcd5964
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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 19300% |ETH 0.0003846 1558.87%

Market

Volume (24H):$1,044,410,396.00
Market Capitalization:$13,465,840,180.00
Circulating Supply:631,099,972.00 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$21.37
0.0063836 Eth
$112,406,990.00
5,030,757.800 LINK
21.6928%
2
Coinbase Exchange
LINK-USD$21.35
0.0063795 Eth
$43,224,650.00
2,024,289.310 LINK
8.7288%
3
Bitget
LINK-USDT$21.36
0.0063802 Eth
$37,850,982.00
1,707,792.008 LINK
7.3641%
4
Bybit
LINK-USDT$21.34
0.0063768 Eth
$32,736,161.00
1,479,091.452 LINK
6.3779%
5
OKX
LINK-USDT$21.35
0.0063773 Eth
$22,574,525.00
1,011,287.028 LINK
4.3607%
6
P2B
LINK-USDT$21.36
0.0063806 Eth
$21,565,201.00
1,009,761.960 LINK
4.3541%
7
CoinW
LINK-USDT$21.38
0.0063911 Eth
$19,060,310.00
891,703.370 LINK
3.8451%
8
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.43
0.0064056 Eth
$16,724,396.00
750,485.550 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.2361%
9
DigiFinex
LINK-USDT$21.36
0.0063818 Eth
$14,468,228.00
677,328.890 LINK
2.9207%
10
Azbit
LINK-USDT$21.34
0.0063817 Eth
$11,179,988.00
500,438.918 LINK
2.1579%
11
XT.COM
LINK-USDT$21.35
0.0063818 Eth
$11,173,913.00
500,282.570 LINK
2.1572%
12
HTX
LINK-USDT$21.36
0.0063808 Eth
$11,040,224.00
494,591.277 LINK
2.1327%
13
Coinstore
LINK-USDT$21.34
0.0063810 Eth
$9,974,154.00
447,145.090 LINK
1.9281%
14
Bitunix
LINK-USDT$21.38
0.0063923 Eth
$9,004,646.00
421,051.540 LINK
1.8156%
15
Biconomy.com
LINK-USDT$21.35
0.0063852 Eth
$7,463,584.00
334,322.262 LINK
1.4416%
16
BYDFi
LINK-USDT$21.39
0.0064020 Eth
$7,020,694.00
328,251.520 LINK
1.4154%
17
BTSE
LINK-USDT$21.35
0.0063772 Eth
$6,936,388.00
324,957.792 LINK
1.4012%
18
Binance
LINK-FDUSD$21.35
0.0063871 Eth
$6,426,805.00
287,757.980 LINK
1.2408%
19
Hotcoin
LINK-USDT$21.35
0.0063854 Eth
$5,389,521.00
252,437.320 LINK
1.0885%
20
LATOKEN
LINK-USDT$21.36
0.0063846 Eth
$5,376,522.00
251,761.240 LINK
1.0856%
21
QMall
LINK-USDT$21.34
0.0063816 Eth
$4,589,251.00
205,591.152 LINK
0.8865%
22
LBank
LINK-USDT$21.34
0.0063816 Eth
$4,570,759.00
214,151.460 LINK
0.9234%
23
Binance
LINK-USDC$21.37
0.0063836 Eth
$4,293,437.00
192,418.110 LINK
0.8297%
24
KuCoin
LINK-USDT$21.36
0.0063826 Eth
$3,894,875.00
182,332.311 LINK
0.7862%
25
Kraken
LINK-USD$21.36
0.0063830 Eth
$3,608,376.00
168,913.124 LINK
0.7284%
26
Dex-Trade
LINK-USDT$21.30
0.0063757 Eth
$3,565,360.00
167,411.261 LINK
0.7219%
27
FMCPAY
LINK-USDT$21.35
0.0063806 Eth
$3,424,560.00
153,360.461 LINK
0.6613%
28
Bitvavo
LINK-EUR$21.34
0.0063856 Eth
$2,938,009.00
137,663.060 LINK
0.5936%
29
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.37
0.0063843 Eth
$2,305,701.00
103,856.708 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4478%
30
Dcoin
LINK-USDT$21.38
0.0063865 Eth
$2,297,076.00
107,457.000 LINK
0.4634%
31
CoinEx
LINK-USDT$21.38
0.0063873 Eth
$2,092,851.00
94,403.441 LINK
0.4071%
32
PointPay
LINK-USDT$21.29
0.0063748 Eth
$1,889,241.00
84,531.946 LINK
0.3645%
33
Coinbase Exchange
LINK-GBP$21.35
0.0063785 Eth
$1,812,197.00
84,891.290 LINK
0.3661%
34
EXMO
LINK-USDT$21.36
0.0063820 Eth
$1,669,406.00
78,149.905 LINK
0.3370%
35
Coinbase Exchange
LINK-ETH$21.31
0.0063719 Eth
$1,525,641.00
71,588.300 LINK
0.3087%
36
FMCPAY
LINK-BTC$21.34
0.0063776 Eth
$1,489,943.00
67,154.400 LINK
0.2896%
37
FMCPAY
LINK-ETH$21.35
0.0063837 Eth
$1,472,896.00
66,101.440 LINK
0.2850%
38
Coinbase Exchange
LINK-EUR$21.36
0.0063829 Eth
$1,433,788.00
67,119.100 LINK
0.2894%
39
Bybit
LINK-USDC$21.33
0.0063737 Eth
$1,400,979.00
63,987.136 LINK
0.2759%
40
WhiteBIT
LINK-BTC$21.34
0.0063783 Eth
$1,339,241.00
62,753.860 LINK
0.2706%
41
Phemex
LINK-USDT$21.35
0.0063853 Eth
$1,276,359.00
59,789.800 LINK
0.2578%
42
Coinbase Exchange
LINK-USDT$21.36
0.0063806 Eth
$1,230,533.00
57,618.085 LINK
0.2485%
43
WhiteBIT
LINK-TRY$21.50
0.0064279 Eth
$1,208,412.00
56,209.020 LINK
0.2424%
44
EarnBIT
LINK-USDT$21.37
0.0063885 Eth
$1,066,340.00
47,706.270 LINK
0.2057%
45
tanX
LINK-USDC$21.41
0.0064023 Eth
$1,015,497.00
45,611.780 LINK
0.1967%
46
Bitbank
LINK-JPY$21.46
0.0064157 Eth
$938,318.00
43,724.503 LINK
0.1885%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.40
0.0063956 Eth
$916,806.00
41,054.984 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1770%
48
BigONE
LINK-USDT$21.39
0.0063989 Eth
$842,487.00
39,382.280 LINK
0.1698%
49
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.36
0.0063850 Eth
$803,033.00
35,872.736 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1547%
50
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.43
0.0064056 Eth
$754,749.00
58,435.248 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2520%
51
Gemini
LINK-USD$21.34
0.0063766 Eth
$733,800.00
34,380.422 LINK
0.1482%
52
Binance
LINK-TRY$21.53
0.0064321 Eth
$718,854.00
31,970.740 LINK
0.1379%
53
Binance
LINK-EUR$21.37
0.0063874 Eth
$578,001.00
25,694.190 LINK
0.1108%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.36
0.0063860 Eth
$574,914.00
25,950.375 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1119%
55
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.39
0.0063958 Eth
$544,012.00
581,010.079 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.5053%
56
itBit
LINK-USD$21.40
0.0063985 Eth
$507,073.00
23,695.005 LINK
0.1022%
57
GMO Japan
LINK-JPY$21.45
0.0064121 Eth
$497,348.00
23,189.100 LINK
0.1000%
58
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.39
0.0063949 Eth
$493,266.00
21,947.139 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0946%
59
WhiteBIT
LINK-EUR$21.34
0.0063802 Eth
$485,688.00
22,760.660 LINK
0.0981%
60
HashKey Exchange
LINK-USD$21.40
0.0063932 Eth
$395,029.00
17,324.772 LINK
0.0747%
61
Slex
LINK-ETH$21.34
0.0063842 Eth
$385,610.00
17,340.860 LINK
0.0748%
62
QMall
LINK-USDC$21.34
0.0063870 Eth
$363,601.00
16,274.916 LINK
0.0702%
63
BitMart
LINK-BTC$21.35
0.0063830 Eth
$362,145.00
16,962.080 LINK
0.0731%
64
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$21.50
0.0064244 Eth
$356,897.00
15,805.253 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0682%
65
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.39
0.0063935 Eth
$342,320.00
361,624.748 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.5593%
66
BitDelta
LINK-USDT$21.36
0.0063841 Eth
$266,219.00
11,886.000 LINK
0.0513%
67
OKX
LINK-USDC$21.35
0.0063778 Eth
$266,078.00
11,905.283 LINK
0.0513%
68
Bitci TR
LINK-TRY$21.36
0.0063827 Eth
$227,456.00
10,119.580 LINK
0.0436%
69
Coinbase Exchange
LINK-BTC$21.36
0.0063848 Eth
$215,644.00
10,097.880 LINK
0.0435%
70
LATOKEN
LINK-BTC$21.38
0.0063933 Eth
$207,932.00
9,723.401 LINK
0.0419%
71
BitStorage
LINK-ETH$21.40
0.0063927 Eth
$197,999.00
9,253.470 LINK
0.0399%
72
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.37
0.0063896 Eth
$184,678.00
8,199.209 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0354%
73
Hotcoin
LINK-BTC$21.35
0.0063842 Eth
$183,625.00
8,602.290 LINK
0.0371%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.35
0.0063830 Eth
$160,707.00
7,229.226 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0312%
75
Bitso
LINK-USD$21.26
0.0063650 Eth
$157,985.00
7,431.026 LINK
0.0320%
76
BitMart
LINK-ETH$21.39
0.0063942 Eth
$153,742.00
7,188.340 LINK
0.0310%
77
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.43
0.0064056 Eth
$147,640.00
6,542.998 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0282%
78
PointPay
LINK-BTC$21.36
0.0063876 Eth
$142,482.00
6,463.818 LINK
0.0279%
79
Bitkub
LINK-THB$21.50
0.0064255 Eth
$137,929.00
6,415.492 LINK
0.0277%
80
Kraken
LINK-GBP$21.27
0.0063560 Eth
$108,613.00
5,105.969 LINK
0.0220%
81
KuCoin
LINK-USDC$21.40
0.0063934 Eth
$106,857.00
4,993.879 LINK
0.0215%
82
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$21.54
0.0064389 Eth
$105,460.00
4,722.990 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0204%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.32
0.0063728 Eth
$103,875.00
4,687.624 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0202%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$21.38
0.0063922 Eth
$98,858.00
4,388.148 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0189%
85
Kanga
LINK-PLN$21.41
0.0064052 Eth
$89,556.00
0.000 LINK
0.0000%
86
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.37
0.0063843 Eth
$88,083.00
93,466.754 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4030%
87
Mercado Bitcoin
LINK-BRL$21.50
0.0064268 Eth
$80,084.00
3,725.077 LINK
0.0161%
88
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.34
0.0063794 Eth
$75,258.00
3,412.200 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0147%
89
Uniswap V3 (Ethereum)
0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.31
0.0063696 Eth
$65,885.00
102,287.373 0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23
0.4411%
90
Hotcoin
LINK-ETH$21.28
0.0063714 Eth
$65,408.00
3,074.220 LINK
0.0133%
91
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.45
0.0064115 Eth
$63,940.00
2,844.845 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0123%
92
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$21.51
0.0064260 Eth
$59,275.00
2,661.336 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0115%
93
Coins.ph
LINK-PHP$21.55
0.0064426 Eth
$52,186.00
2,301.429 LINK
0.0099%
94
Nonkyc.io
LINK-BTC$21.28
0.0063575 Eth
$43,199.00
1,939.300 LINK
0.0084%
95
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$21.42
0.0064042 Eth
$39,767.00
1,768.501 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0076%
96
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.43
0.0064056 Eth
$37,227.00
2,858.351 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0123%
97
Gemini
LINK-BTC$21.42
0.0063991 Eth
$32,879.00
1,535.053 LINK
0.0066%
98
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.40
0.0063966 Eth
$29,432.00
1,335.131 0X5947BB275C521040051D82396192181B413227A3
0.0058%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$21.36
0.0063868 Eth
$25,123.00
1,122.246 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0048%
100
Bitexen
LINK-TRY$21.31
0.0063727 Eth
$19,460.34
913.338 LINK
0.0039%

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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