ETH Price: $3,496.53 (+1.26%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,069 ( -0.002%)

Market

Price

$24.65 @ 0.007050 ETH (+0.52%)

Onchain Market Cap

$24,650,000,000.00

Circulating Supply Market Cap

$15,584,814,583.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.02 LINK

Value
$0.49 ( ~0.000140138949181955 Eth) [0.0000%]
0x7e4c3c5f20ccd0dc27189fc833871ea9c1ce53d2
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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 22309.09% |ETH 0.0003846 1733.07%

Market

Volume (24H):$1,592,103,304.00
Market Capitalization:$15,584,814,583.00
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
WhiteBIT
LINK-USDT$24.74
0.0070853 Eth
$62,091,263.00
2,509,529.420 LINK
11.3120%
2
Coinbase Exchange
LINK-USD$24.73
0.0070815 Eth
$61,635,913.00
2,492,051.620 LINK
11.2333%
3
MEXC
LINK-USDT$24.75
0.0070849 Eth
$45,122,797.00
1,823,327.890 LINK
8.2189%
4
Bybit
LINK-USDT$24.74
0.0070829 Eth
$42,152,519.00
1,685,194.551 LINK
7.5962%
5
OKX
LINK-USDT$24.72
0.0070782 Eth
$29,186,635.00
1,168,284.192 LINK
5.2662%
6
DigiFinex
LINK-USDT$24.79
0.0070962 Eth
$24,091,495.00
971,817.090 LINK
4.3806%
7
XT.COM
LINK-USDT$24.72
0.0070772 Eth
$21,324,129.00
853,994.730 LINK
3.8495%
8
FameEX
LINK-USDT$24.77
0.0070917 Eth
$18,821,287.00
753,887.538 LINK
3.3983%
9
Azbit
LINK-USDT$24.73
0.0070792 Eth
$18,656,151.00
747,145.983 LINK
3.3679%
10
Coinstore
LINK-USDT$24.76
0.0070878 Eth
$15,796,470.00
633,066.560 LINK
2.8536%
11
Bitunix
LINK-USDT$24.72
0.0070800 Eth
$14,850,765.00
600,797.750 LINK
2.7082%
12
HTX
LINK-USDT$24.74
0.0070859 Eth
$12,510,674.00
502,131.822 LINK
2.2634%
13
BTSE
LINK-USDT$24.67
0.0070650 Eth
$12,073,827.00
489,502.615 LINK
2.2065%
14
Binance
LINK-FDUSD$24.63
0.0070713 Eth
$11,376,359.00
455,409.180 LINK
2.0528%
15
BYDFi
LINK-USDT$24.60
0.0070597 Eth
$11,025,526.00
448,160.390 LINK
2.0201%
16
KuCoin
LINK-USDT$24.75
0.0070856 Eth
$9,717,563.00
392,633.652 LINK
1.7699%
17
LATOKEN
LINK-USDT$24.70
0.0070787 Eth
$9,055,442.00
366,639.651 LINK
1.6527%
18
Kraken
LINK-USD$24.73
0.0070805 Eth
$8,889,754.00
359,541.968 LINK
1.6207%
19
Biconomy.com
LINK-USDT$24.75
0.0070864 Eth
$8,762,171.00
350,875.760 LINK
1.5816%
20
QMall
LINK-USDT$24.74
0.0070925 Eth
$7,514,255.00
300,664.647 LINK
1.3553%
21
Dex-Trade
LINK-USDT$24.73
0.0070814 Eth
$6,197,621.00
250,627.650 LINK
1.1297%
22
Hotcoin
LINK-USDT$24.60
0.0070652 Eth
$5,764,916.00
234,339.610 LINK
1.0563%
23
LBank
LINK-USDT$24.72
0.0070763 Eth
$5,342,749.00
216,138.620 LINK
0.9743%
24
Bitvavo
LINK-EUR$24.88
0.0071229 Eth
$4,676,454.00
187,993.067 LINK
0.8474%
25
Binance
LINK-USDC$24.69
0.0070838 Eth
$4,581,686.00
183,656.930 LINK
0.8279%
26
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.89
0.0071247 Eth
$4,346,652.00
172,845.687 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.7791%
27
Dcoin
LINK-USDT$24.62
0.0070619 Eth
$3,005,634.00
122,083.000 LINK
0.5503%
28
CoinEx
LINK-USDT$24.72
0.0070755 Eth
$2,972,175.00
118,840.898 LINK
0.5357%
29
PointPay
LINK-USDT$24.65
0.0070675 Eth
$2,876,461.00
115,050.983 LINK
0.5186%
30
EXMO
LINK-USDT$24.75
0.0070862 Eth
$2,841,943.00
114,848.741 LINK
0.5177%
31
Coinbase Exchange
LINK-EUR$24.83
0.0071082 Eth
$2,619,151.00
105,488.560 LINK
0.4755%
32
WhiteBIT
LINK-BTC$24.71
0.0070837 Eth
$2,256,669.00
91,337.710 LINK
0.4117%
33
WhiteBIT
LINK-TRY$24.86
0.0071258 Eth
$2,111,056.00
84,907.620 LINK
0.3827%
34
Phemex
LINK-USDT$24.71
0.0070815 Eth
$1,946,294.00
78,770.330 LINK
0.3551%
35
Coinbase Exchange
LINK-USDT$24.72
0.0070764 Eth
$1,918,270.00
77,607.747 LINK
0.3498%
36
BitMart
LINK-USDT$24.79
0.0070964 Eth
$1,717,484.00
69,279.220 LINK
0.3123%
37
BitStorage
LINK-USDT$24.71
0.0070849 Eth
$1,541,546.00
62,383.210 LINK
0.2812%
38
tanX
LINK-USDC$24.69
0.0070789 Eth
$1,432,325.00
57,423.550 LINK
0.2588%
39
EarnBIT
LINK-USDT$24.82
0.0071058 Eth
$1,369,910.00
54,569.902 LINK
0.2460%
40
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.74
0.0070824 Eth
$1,313,176.00
52,325.710 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2359%
41
Binance
LINK-TRY$24.75
0.0070960 Eth
$1,232,640.00
49,095.420 LINK
0.2213%
42
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$24.62
0.0070478 Eth
$1,153,375.00
45,586.880 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.2055%
43
Bitbank
LINK-JPY$24.67
0.0070693 Eth
$1,115,992.00
45,244.165 LINK
0.2039%
44
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.70
0.0070726 Eth
$1,042,787.00
41,950.880 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1891%
45
Koinpark
LINK-USDT$24.60
0.0070652 Eth
$977,020.00
39,715.151 LINK
0.1790%
46
WhiteBIT
LINK-EUR$24.79
0.0070979 Eth
$914,822.00
36,908.790 LINK
0.1664%
47
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.77
0.0070925 Eth
$902,746.00
35,912.848 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1619%
48
BigONE
LINK-USDT$24.59
0.0070513 Eth
$855,095.00
34,771.680 LINK
0.1567%
49
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.59
0.0070417 Eth
$841,138.00
59,283.332 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2672%
50
KuCoin
LINK-USDC$24.66
0.0070587 Eth
$821,846.00
33,332.733 LINK
0.1503%
51
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.80
0.0071002 Eth
$797,474.00
31,719.112 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1430%
52
Binance
LINK-EUR$24.77
0.0070916 Eth
$720,673.00
28,708.290 LINK
0.1294%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$24.85
0.0071132 Eth
$702,634.00
28,054.398 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1265%
54
GMO Japan
LINK-JPY$24.73
0.0070902 Eth
$657,911.00
26,604.200 LINK
0.1199%
55
HashKey Exchange
LINK-USD$24.68
0.0070646 Eth
$652,646.00
26,178.189 LINK
0.1180%
56
Gemini
LINK-USD$24.73
0.0070812 Eth
$646,450.00
26,142.894 LINK
0.1178%
57
Coinbase Exchange
LINK-ETH$24.69
0.0070697 Eth
$608,994.00
24,663.660 LINK
0.1112%
58
WEEX
LINK-USDC$24.75
0.0070903 Eth
$500,981.00
20,242.182 LINK
0.0912%
59
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.61
0.0070446 Eth
$485,647.00
493,636.214 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.2251%
60
itBit
LINK-USD$24.75
0.0070934 Eth
$477,151.00
19,278.827 LINK
0.0869%
61
Slex
LINK-ETH$24.68
0.0070739 Eth
$445,929.00
17,864.370 LINK
0.0805%
62
BitMart
LINK-BTC$24.74
0.0070818 Eth
$440,617.00
17,810.060 LINK
0.0803%
63
Coinbase Exchange
LINK-BTC$24.68
0.0070772 Eth
$431,880.00
17,496.210 LINK
0.0789%
64
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.78
0.0070964 Eth
$416,492.00
16,643.287 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0750%
65
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.89
0.0071247 Eth
$392,544.00
394,655.407 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
1.7790%
66
LATOKEN
LINK-BTC$24.71
0.0070761 Eth
$357,009.00
14,447.926 LINK
0.0651%
67
OKX
LINK-USDC$24.73
0.0070811 Eth
$319,856.00
12,799.077 LINK
0.0577%
68
Binance US
LINK-USDT$24.62
0.0070477 Eth
$316,201.00
12,842.814 LINK
0.0579%
69
Bitkub
LINK-THB$24.74
0.0070931 Eth
$280,672.00
11,345.202 LINK
0.0511%
70
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.73
0.0070800 Eth
$280,129.00
11,270.708 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0508%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.68
0.0070658 Eth
$270,192.00
10,780.530 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0486%
72
PointPay
LINK-BTC$24.65
0.0070671 Eth
$248,606.00
9,898.392 LINK
0.0446%
73
Bitci TR
LINK-TRY$24.70
0.0070816 Eth
$246,316.00
9,845.570 LINK
0.0444%
74
BitMart
LINK-ETH$24.68
0.0070654 Eth
$241,117.00
9,768.640 LINK
0.0440%
75
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$24.67
0.0070642 Eth
$229,386.00
9,147.358 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0412%
76
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.67
0.0070640 Eth
$225,616.00
9,014.928 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0406%
77
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.72
0.0070758 Eth
$222,378.00
8,932.576 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0403%
78
BitStorage
LINK-ETH$24.65
0.0070637 Eth
$221,593.00
8,990.920 LINK
0.0405%
79
BTCMarkets
LINK-AUD$24.79
0.0071133 Eth
$202,870.00
8,184.036 LINK
0.0369%
80
KuCoin
LINK-BTC$24.64
0.0070556 Eth
$197,457.00
8,012.055 LINK
0.0361%
81
Hotcoin
LINK-BTC$24.74
0.0070893 Eth
$197,099.00
7,967.510 LINK
0.0359%
82
Kraken
LINK-GBP$24.67
0.0070655 Eth
$185,839.00
7,532.154 LINK
0.0340%
83
Bitso
LINK-USD$24.65
0.0070724 Eth
$154,956.00
6,285.987 LINK
0.0283%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$24.61
0.0070446 Eth
$125,280.00
5,006.184 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0226%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.85
0.0071156 Eth
$123,185.00
4,899.164 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0221%
86
EXMO
LINK-BTC$24.91
0.0071337 Eth
$113,358.00
4,550.516 LINK
0.0205%
87
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$24.73
0.0070791 Eth
$100,871.00
3,968.916 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0179%
88
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.63
0.0070510 Eth
$81,634.00
3,256.645 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0147%
89
Nonkyc.io
LINK-BTC$24.56
0.0070486 Eth
$70,003.00
2,804.233 LINK
0.0126%
90
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$24.60
0.0070438 Eth
$68,284.00
91.224 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0004%
91
Hotcoin
LINK-ETH$24.71
0.0070761 Eth
$67,605.00
2,735.450 LINK
0.0123%
92
Bitexen
LINK-TRY$24.38
0.0069919 Eth
$65,788.00
2,698.617 LINK
0.0122%
93
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$24.70
0.0070719 Eth
$44,672.00
1,800.065 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0081%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$24.61
0.0070446 Eth
$42,830.00
1,704.292 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0077%
95
HTX
LINK-BTC$24.77
0.0070939 Eth
$40,242.00
1,604.219 LINK
0.0072%
96
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$24.39
0.0069836 Eth
$39,773.00
1,610.940 0X5947BB275C521040051D82396192181B413227A3
0.0073%
97
Binance US
LINK-BTC$24.54
0.0070533 Eth
$34,505.00
1,406.024 LINK
0.0063%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$24.67
0.0070625 Eth
$32,310.00
1,283.154 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0058%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.95
0.0068571 Eth
$28,131.00
1,121.581 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0051%
100
Ace
LINK-USDT$24.66
0.0070600 Eth
$7,210.60
289.050 LINK
0.0013%

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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