ETH Price: $2,710.00 (-5.05%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

732,892 ( 0.014%)

Market

Price

$18.72 @ 0.006908 ETH (-5.10%)

Onchain Market Cap

$18,720,000,000.00

Circulating Supply Market Cap

$11,984,494,977.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xd18ba063dc07d5b9d54dedfb9f748492da8dca0d
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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 16918.18% |ETH 0.0003846 1696.15%

Market

Volume (24H):$680,198,073.00
Market Capitalization:$11,984,494,977.00
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$18.75
0.0069216 Eth
$87,581,260.00
4,607,574.310 LINK
22.4036%
2
Coinbase Exchange
LINK-USD$18.72
0.0069189 Eth
$42,167,532.00
2,252,539.090 LINK
10.9526%
3
Bybit
LINK-USDT$18.75
0.0069213 Eth
$34,699,919.00
1,825,168.118 LINK
8.8746%
4
HTX
LINK-USDT$18.73
0.0069135 Eth
$19,152,554.00
1,008,578.299 LINK
4.9041%
5
P2B
LINK-USDT$18.68
0.0069051 Eth
$17,430,195.00
932,979.970 LINK
4.5365%
6
Gate.io
LINK-USDT$18.73
0.0069142 Eth
$15,890,675.00
833,926.480 LINK
4.0548%
7
OKX
LINK-USDT$18.74
0.0069161 Eth
$11,801,374.00
621,353.493 LINK
3.0212%
8
DigiFinex
LINK-USDT$18.73
0.0069134 Eth
$10,872,244.00
580,458.140 LINK
2.8224%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.66
0.0068943 Eth
$10,637,523.00
567,717.679 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.7604%
10
MEXC
LINK-USDT$18.73
0.0069146 Eth
$10,380,432.00
554,097.230 LINK
2.6942%
11
XT.COM
LINK-USDT$18.72
0.0069198 Eth
$8,767,358.00
461,322.230 LINK
2.2431%
12
KuCoin
LINK-USDT$18.75
0.0069238 Eth
$8,227,770.00
438,701.672 LINK
2.1331%
13
Coinstore
LINK-USDT$18.73
0.0069202 Eth
$7,224,090.00
380,232.700 LINK
1.8488%
14
BTSE
LINK-USDT$18.74
0.0069096 Eth
$7,171,883.00
382,677.901 LINK
1.8607%
15
Bitunix
LINK-USDT$18.75
0.0069237 Eth
$6,164,563.00
328,923.520 LINK
1.5993%
16
Kraken
LINK-USD$18.75
0.0069219 Eth
$5,921,545.00
315,796.042 LINK
1.5355%
17
CoinW
LINK-USDT$18.70
0.0069126 Eth
$5,800,687.00
310,146.260 LINK
1.5080%
18
Hotcoin
LINK-USDT$18.73
0.0069218 Eth
$5,578,614.00
297,769.770 LINK
1.4479%
19
Binance
LINK-USDC$18.73
0.0069126 Eth
$5,392,452.00
284,004.930 LINK
1.3809%
20
Azbit
LINK-USDT$18.72
0.0069133 Eth
$5,197,571.00
273,457.407 LINK
1.3296%
21
BYDFi
LINK-USDT$18.72
0.0069110 Eth
$4,829,260.00
257,918.850 LINK
1.2541%
22
LATOKEN
LINK-USDT$18.68
0.0069053 Eth
$4,416,873.00
236,391.809 LINK
1.1494%
23
Bitvavo
LINK-EUR$18.75
0.0069238 Eth
$3,882,658.00
207,021.022 LINK
1.0066%
24
QMall
LINK-USDT$18.74
0.0069207 Eth
$3,524,282.00
185,647.594 LINK
0.9027%
25
Dex-Trade
LINK-USDT$18.71
0.0069161 Eth
$2,762,228.00
147,599.950 LINK
0.7177%
26
FMCPAY
LINK-USDT$18.71
0.0069144 Eth
$2,278,221.00
119,819.782 LINK
0.5826%
27
Coinbase Exchange
LINK-EUR$18.75
0.0069208 Eth
$1,972,683.00
105,220.860 LINK
0.5116%
28
Biconomy.com
LINK-USDT$18.73
0.0069215 Eth
$1,735,928.00
91,250.670 LINK
0.4437%
29
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.67
0.0068962 Eth
$1,554,421.00
82,860.842 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4029%
30
CoinEx
LINK-USDT$18.70
0.0069127 Eth
$1,498,238.00
79,172.958 LINK
0.3850%
31
Coinbase Exchange
LINK-GBP$18.69
0.0069048 Eth
$1,457,595.00
77,976.100 LINK
0.3791%
32
PointPay
LINK-USDT$18.75
0.0069216 Eth
$1,394,490.00
73,507.354 LINK
0.3574%
33
FMCPAY
LINK-ETH$18.70
0.0069093 Eth
$1,263,105.00
67,342.240 LINK
0.3274%
34
FMCPAY
LINK-BTC$18.72
0.0069172 Eth
$1,091,352.00
57,435.800 LINK
0.2793%
35
Phemex
LINK-USDT$18.67
0.0069016 Eth
$965,684.00
51,711.210 LINK
0.2514%
36
EXMO
LINK-USDT$18.76
0.0069267 Eth
$900,209.00
47,974.881 LINK
0.2333%
37
tanX
LINK-USDC$18.72
0.0069121 Eth
$855,768.00
44,726.640 LINK
0.2175%
38
Trubit
LINK-USDT$18.75
0.0069212 Eth
$855,005.00
44,917.910 LINK
0.2184%
39
Binance
LINK-ETH$18.71
0.0069073 Eth
$841,155.00
44,735.310 LINK
0.2175%
40
Gemini
LINK-USD$18.79
0.0069360 Eth
$797,033.00
42,413.617 LINK
0.2062%
41
Bybit
LINK-USDC$18.74
0.0069171 Eth
$706,783.00
37,265.914 LINK
0.1812%
42
BitStorage
LINK-USDT$18.69
0.0069088 Eth
$704,920.00
37,711.820 LINK
0.1834%
43
BigONE
LINK-USDT$18.82
0.0069501 Eth
$702,006.00
37,304.770 LINK
0.1814%
44
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$18.68
0.0069002 Eth
$677,746.00
35,848.857 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1743%
45
Binance
LINK-EUR$18.80
0.0069366 Eth
$589,483.00
30,937.520 LINK
0.1504%
46
Coinbase Exchange
LINK-USDT$18.72
0.0069161 Eth
$561,798.00
30,012.113 LINK
0.1459%
47
Binance
LINK-TRY$18.73
0.0069015 Eth
$559,334.00
29,266.780 LINK
0.1423%
48
EarnBIT
LINK-USDT$18.72
0.0069152 Eth
$553,043.00
29,198.857 LINK
0.1420%
49
Coinbase Exchange
LINK-ETH$18.84
0.0069534 Eth
$537,716.00
28,546.560 LINK
0.1388%
50
Bitbank
LINK-JPY$18.74
0.0069266 Eth
$532,990.00
28,437.160 LINK
0.1383%
51
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.79
0.0069383 Eth
$507,531.00
26,672.943 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1297%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.67
0.0068951 Eth
$489,464.00
26,076.398 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1268%
53
GMO Japan
LINK-JPY$18.68
0.0069039 Eth
$437,329.00
23,412.700 LINK
0.1138%
54
QMall
LINK-USDC$18.78
0.0069209 Eth
$430,136.00
22,672.553 LINK
0.1102%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.70
0.0069082 Eth
$397,023.00
21,225.596 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1032%
56
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.68
0.0069002 Eth
$381,978.00
388,477.243 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.8889%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.71
0.0069115 Eth
$374,274.00
19,937.463 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0969%
58
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.67
0.0068962 Eth
$347,754.00
18,359.910 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0893%
59
itBit
LINK-USD$18.71
0.0069145 Eth
$323,113.00
17,269.558 LINK
0.0840%
60
Coinbase Exchange
LINK-BTC$18.78
0.0069354 Eth
$310,537.00
16,539.220 LINK
0.0804%
61
OKX
LINK-USDC$18.71
0.0069041 Eth
$306,717.00
16,293.787 LINK
0.0792%
62
LATOKEN
LINK-BTC$18.78
0.0069186 Eth
$303,338.00
16,155.001 LINK
0.0786%
63
Slex
LINK-ETH$18.72
0.0069118 Eth
$298,075.00
15,876.540 LINK
0.0772%
64
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.74
0.0069171 Eth
$292,315.00
15,558.835 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0757%
65
BitDelta
LINK-USDT$18.73
0.0069218 Eth
$272,536.00
14,326.000 LINK
0.0697%
66
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.71
0.0069128 Eth
$264,430.00
14,091.822 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0685%
67
WhiteBIT
LINK-TRY$18.72
0.0069051 Eth
$254,657.00
13,605.860 LINK
0.0662%
68
BitMart
LINK-BTC$18.74
0.0069176 Eth
$248,730.00
13,271.340 LINK
0.0645%
69
Bitkub
LINK-THB$18.76
0.0069346 Eth
$239,256.00
12,750.487 LINK
0.0620%
70
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.66
0.0068978 Eth
$208,357.00
10,993.368 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0535%
71
Hotcoin
LINK-BTC$18.72
0.0069108 Eth
$201,911.00
10,783.100 LINK
0.0524%
72
BitStorage
LINK-ETH$18.70
0.0069044 Eth
$191,085.00
10,216.440 LINK
0.0497%
73
KuCoin
LINK-USDC$18.69
0.0069004 Eth
$187,820.00
10,048.510 LINK
0.0489%
74
Bitso
LINK-USD$18.75
0.0069296 Eth
$187,486.00
9,998.779 LINK
0.0486%
75
BYDFi
LINK-USDC$18.68
0.0068956 Eth
$177,311.00
9,490.230 LINK
0.0461%
76
WhiteBIT
LINK-BTC$18.77
0.0069273 Eth
$149,061.00
7,942.180 LINK
0.0386%
77
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.70
0.0069071 Eth
$135,727.00
7,145.756 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0347%
78
Mercado Bitcoin
LINK-BRL$18.82
0.0069488 Eth
$118,461.00
6,293.635 LINK
0.0306%
79
PointPay
LINK-BTC$18.75
0.0069210 Eth
$107,484.00
5,684.417 LINK
0.0276%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$18.71
0.0069128 Eth
$103,723.00
5,487.013 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0267%
81
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.84
0.0069608 Eth
$76,246.00
4,052.905 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0197%
82
BitMart
LINK-ETH$18.72
0.0069106 Eth
$69,233.00
3,697.800 LINK
0.0180%
83
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.57
0.0068569 Eth
$63,877.00
3,434.799 0X5947BB275C521040051D82396192181B413227A3
0.0167%
84
EXMO
LINK-BTC$18.81
0.0069453 Eth
$59,276.00
3,150.555 LINK
0.0153%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.67
0.0068962 Eth
$58,176.00
59,221.274 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2880%
86
Hotcoin
LINK-ETH$18.70
0.0069113 Eth
$57,041.00
3,050.190 LINK
0.0148%
87
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.80
0.0069395 Eth
$48,590.00
2,550.666 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0124%
88
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$18.83
0.0069555 Eth
$48,174.00
2,541.190 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0124%
89
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.72
0.0069087 Eth
$46,029.00
2,452.144 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0119%
90
Indodax
LINK-IDR$18.75
0.0069226 Eth
$36,045.00
1,922.071 LINK
0.0093%
91
Gemini
LINK-BTC$18.79
0.0069352 Eth
$28,636.00
1,524.047 LINK
0.0074%
92
Dex-Trade
LINK-ETH$18.69
0.0069031 Eth
$25,793.00
1,379.960 LINK
0.0067%
93
Bitexen
LINK-TRY$18.59
0.0068545 Eth
$25,568.00
1,375.705 LINK
0.0067%
94
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$18.77
0.0069295 Eth
$21,552.00
34.832 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$18.80
0.0069429 Eth
$19,561.53
1,029.895 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0050%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.79
0.0069335 Eth
$19,026.89
1,595.653 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0078%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.68
0.0069002 Eth
$18,043.11
961.862 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0047%
98
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.70
0.0069095 Eth
$16,189.56
16,414.612 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0798%
99
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.74
0.0069213 Eth
$14,909.33
802.141 0X5947BB275C521040051D82396192181B413227A3
0.0039%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$18.69
0.0069011 Eth
$14,682.04
770.125 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0037%

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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