ETH Price: $2,493.63 (+0.76%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,304 ( -0.011%)

Market

Price

$10.95 @ 0.004391 ETH (+0.42%)

Onchain Market Cap

$10,950,000,000.00

Circulating Supply Market Cap

$6,861,601,234.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
64.83583326 LINK

Value
$709.95 ( ~0.28470543411404 Eth) [0.0000%]
0xfc52ba56499f7057dad79a13bcd7e4820c8489fe
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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 9854.55% |ETH 0.0003846 1041.71%

Market

Volume (24H):$312,679,451.00
Market Capitalization:$6,861,601,234.00
Circulating Supply:626,849,971.00 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
Ecxx
LINK-USDT$10.93
0.0043803 Eth
$58,246,688.00
5,328,699.580 LINK
34.3984%
2
WhiteBIT
LINK-USDT$10.90
0.0043704 Eth
$12,896,215.00
1,183,024.980 LINK
7.6368%
3
HTX
LINK-USDT$10.90
0.0043712 Eth
$8,513,566.00
775,698.632 LINK
5.0074%
4
Bitget
LINK-USDT$10.91
0.0043734 Eth
$8,217,154.00
749,028.566 LINK
4.8352%
5
Coinbase Exchange
LINK-USD$10.89
0.0043676 Eth
$7,537,044.00
691,852.800 LINK
4.4661%
6
Azbit
LINK-USDT$10.91
0.0043733 Eth
$4,490,663.00
409,807.730 LINK
2.6454%
7
Bybit
LINK-USDT$10.91
0.0043748 Eth
$4,314,976.00
392,702.252 LINK
2.5350%
8
BTSE
LINK-USDT$10.90
0.0043669 Eth
$3,468,938.00
318,329.897 LINK
2.0549%
9
Poloniex
LINK-USDT$10.90
0.0043696 Eth
$3,156,859.00
287,519.104 LINK
1.8560%
10
WEEX
LINK-USDT$10.95
0.0043826 Eth
$3,005,784.00
273,699.890 LINK
1.7668%
11
P2B
LINK-USDT$10.90
0.0043669 Eth
$3,005,618.00
275,810.850 LINK
1.7804%
12
Biconomy.com
LINK-USDT$10.90
0.0043716 Eth
$2,926,694.00
266,803.950 LINK
1.7223%
13
BVOX
LINK-USDT$10.90
0.0043689 Eth
$2,863,901.00
260,741.994 LINK
1.6832%
14
Ourbit
LINK-USDT$10.94
0.0043818 Eth
$2,521,023.00
229,591.110 LINK
1.4821%
15
Slex
LINK-USDT$10.90
0.0043726 Eth
$2,513,012.00
228,866.580 LINK
1.4774%
16
Upbit
LINK-KRW$10.99
0.0044056 Eth
$2,344,215.00
213,323.454 LINK
1.3771%
17
Trubit
LINK-USDT$10.96
0.0043817 Eth
$2,177,614.00
198,163.210 LINK
1.2792%
18
OKX
LINK-USDT$10.91
0.0043740 Eth
$2,149,740.00
195,880.494 LINK
1.2645%
19
DigiFinex
LINK-USDT$10.90
0.0043696 Eth
$1,832,672.00
168,147.250 LINK
1.0854%
20
KuCoin
LINK-USDT$10.90
0.0043696 Eth
$1,729,193.00
158,682.630 LINK
1.0243%
21
AscendEX (BitMax)
LINK-USDT$10.89
0.0043667 Eth
$1,702,194.00
156,290.100 LINK
1.0089%
22
C-Patex
LINK-USDT$10.90
0.0043701 Eth
$1,563,642.00
143,409.572 LINK
0.9258%
23
Deepcoin
LINK-USDT$10.90
0.0043650 Eth
$1,498,687.00
138,073.460 LINK
0.8913%
24
CoinW
LINK-USDT$10.97
0.0043890 Eth
$1,494,602.00
136,297.430 LINK
0.8798%
25
XT.COM
LINK-USDT$10.97
0.0043894 Eth
$1,430,518.00
130,252.090 LINK
0.8408%
26
Niza Global
LINK-USD$10.94
0.0043795 Eth
$1,275,188.00
116,107.889 LINK
0.7495%
27
Kraken
LINK-USD$10.90
0.0043704 Eth
$1,263,692.00
115,931.232 LINK
0.7484%
28
Toobit
LINK-USDT$10.92
0.0043766 Eth
$1,206,702.00
109,901.580 LINK
0.7094%
29
Bitunix
LINK-USDT$10.90
0.0043673 Eth
$1,189,879.00
109,228.630 LINK
0.7051%
30
HashKey Global
LINK-USDT$10.96
0.0043853 Eth
$1,098,851.00
100,772.132 LINK
0.6505%
31
Coinstore
LINK-USDT$10.91
0.0043736 Eth
$1,064,000.00
96,929.820 LINK
0.6257%
32
Crypto.com Exchange
LINK-USDT$10.90
0.0043698 Eth
$1,013,573.00
92,998.300 LINK
0.6003%
33
Binance
LINK-BTC$10.90
0.0043702 Eth
$837,556.00
76,128.350 LINK
0.4914%
34
Azbit
LINK-ETH$10.95
0.0043812 Eth
$825,799.00
74,799.388 LINK
0.4829%
35
MEXC
LINK-USDT$10.91
0.0043766 Eth
$777,189.00
71,205.360 LINK
0.4597%
36
FMCPAY
LINK-USDT$10.90
0.0043690 Eth
$763,322.00
69,562.624 LINK
0.4490%
37
BYDFi
LINK-USDT$10.92
0.0043695 Eth
$670,700.00
61,431.700 LINK
0.3966%
38
Bithumb
LINK-KRW$10.99
0.0044056 Eth
$631,397.00
57,457.092 LINK
0.3709%
39
Bitvavo
LINK-EUR$10.92
0.0043783 Eth
$626,487.00
57,349.477 LINK
0.3702%
40
Crypto.com Exchange
LINK-USD$10.89
0.0043678 Eth
$612,616.00
56,234.230 LINK
0.3630%
41
HitBTC
LINK-USDT$10.90
0.0043699 Eth
$593,106.00
54,071.390 LINK
0.3490%
42
FMFW.io
LINK-USDT$10.91
0.0043719 Eth
$590,033.00
54,068.050 LINK
0.3490%
43
FameEX
LINK-USDT$10.94
0.0043786 Eth
$570,912.00
51,966.906 LINK
0.3355%
44
Gate.io
LINK-USDT$10.90
0.0043704 Eth
$534,736.00
48,661.650 LINK
0.3141%
45
CoinEx
LINK-USDT$10.91
0.0043708 Eth
$518,342.00
47,226.649 LINK
0.3049%
46
WhiteBIT
LINK-BTC$10.90
0.0043708 Eth
$515,889.00
47,319.740 LINK
0.3055%
47
Dex-Trade
LINK-USDT$10.92
0.0043738 Eth
$480,298.00
43,994.231 LINK
0.2840%
48
FMCPAY
LINK-BTC$10.91
0.0043754 Eth
$477,589.00
43,375.850 LINK
0.2800%
49
FMCPAY
LINK-ETH$10.91
0.0043753 Eth
$385,683.00
34,943.680 LINK
0.2256%
50
LATOKEN
LINK-USDT$10.90
0.0043687 Eth
$274,451.00
25,187.957 LINK
0.1626%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.93
0.0043810 Eth
$244,499.00
22,253.577 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1437%
52
PointPay
LINK-USDT$10.94
0.0043814 Eth
$239,739.00
21,825.049 LINK
0.1409%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.91
0.0043730 Eth
$234,753.00
21,328.399 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1377%
54
BitMart
LINK-BTC$10.90
0.0043717 Eth
$196,674.00
18,039.480 LINK
0.1165%
55
BigONE
LINK-USDT$10.90
0.0043678 Eth
$190,712.00
17,499.970 LINK
0.1130%
56
Pionex
LINK-USDT$10.90
0.0043714 Eth
$189,366.00
17,245.450 LINK
0.1113%
57
LATOKEN
LINK-BTC$10.91
0.0043759 Eth
$169,201.00
15,502.873 LINK
0.1001%
58
EXMO
LINK-USDT$10.90
0.0043697 Eth
$146,247.00
13,418.824 LINK
0.0866%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.92
0.0043798 Eth
$146,197.00
13,238.621 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0855%
60
Phemex
LINK-USDT$10.91
0.0043727 Eth
$145,208.00
13,314.360 LINK
0.0859%
61
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.97
0.0043983 Eth
$139,320.00
12,722.584 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0821%
62
Bit2Me
LINK-EUR$10.90
0.0043712 Eth
$125,844.00
11,539.483 LINK
0.0745%
63
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.91
0.0043733 Eth
$121,565.00
11,006.329 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0710%
64
BitDelta
LINK-USDT$10.90
0.0043673 Eth
$120,775.00
11,009.000 LINK
0.0711%
65
Bitci TR
LINK-TRY$10.97
0.0043943 Eth
$115,311.00
10,428.530 LINK
0.0673%
66
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.91
0.0043734 Eth
$110,087.00
10,024.917 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0647%
67
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.97
0.0043986 Eth
$97,116.00
8,865.718 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0572%
68
WhiteBIT
LINK-TRY$11.00
0.0044017 Eth
$96,897.00
8,811.510 LINK
0.0569%
69
Coinbase Exchange
LINK-BTC$10.90
0.0043699 Eth
$95,047.00
8,720.650 LINK
0.0563%
70
Slex
LINK-ETH$10.97
0.0043896 Eth
$66,419.00
6,010.660 LINK
0.0388%
71
Coinbase Exchange
LINK-ETH$10.94
0.0043887 Eth
$60,638.00
5,540.280 LINK
0.0358%
72
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.92
0.0043769 Eth
$59,909.00
60,369.377 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3897%
73
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.91
0.0043727 Eth
$56,553.00
56,875.456 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3671%
74
Slex
LINK-BTC$10.90
0.0043703 Eth
$52,183.00
4,744.700 LINK
0.0306%
75
OKX
LINK-USDC$10.92
0.0043786 Eth
$48,801.00
4,446.388 LINK
0.0287%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.92
0.0043798 Eth
$36,682.00
3,327.437 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0215%
77
Binance US
LINK-USDT$10.91
0.0043709 Eth
$23,396.00
2,144.955 LINK
0.0138%
78
EXMO
LINK-BTC$10.90
0.0043719 Eth
$22,446.00
2,058.507 LINK
0.0133%
79
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.91
0.0043756 Eth
$19,831.81
1,800.813 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0116%
80
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.97
0.0043962 Eth
$19,821.76
19,896.541 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1284%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.92
0.0043769 Eth
$17,000.24
1,546.433 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0100%
82
Bitcointry
LINK-USDT$10.90
0.0043693 Eth
$16,683.24
1,523.629 LINK
0.0098%
83
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.91
0.0043730 Eth
$16,017.19
1,458.320 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0094%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.91
0.0043730 Eth
$13,017.54
13,176.671 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0851%
85
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.92
0.0043800 Eth
$11,333.31
1,027.819 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0066%
86
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.98
0.0043956 Eth
$8,431.59
794.203 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0051%
87
TokoCrypto
LINK-USDT$10.95
0.0043815 Eth
$8,043.86
734.883 LINK
0.0047%
88
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$10.98
0.0043978 Eth
$5,963.76
41.070 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0003%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.90
0.0043699 Eth
$4,429.43
401.797 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0026%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.91
0.0043750 Eth
$3,340.46
304.207 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0020%
91
CoinEx
LINK-BTC$10.97
0.0043943 Eth
$2,470.51
223.578 LINK
0.0014%
92
CoinEx
LINK-USDC$10.93
0.0043801 Eth
$1,986.39
180.822 LINK
0.0012%
93
Uniswap V3 (Ethereum)
0XC944E90C64B2C07662A292BE6244BDF05CDA44A7-0X514910771AF9CA656AF840DFF83E8264ECF986CA$10.97
0.0043919 Eth
$1,191.37
7,787.935 0XC944E90C64B2C07662A292BE6244BDF05CDA44A7
0.0503%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$10.98
0.0043981 Eth
$1,089.09
97.294 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0006%
95
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$10.95
0.0043829 Eth
$956.39
86.662 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0006%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.97
0.0043944 Eth
$868.60
78.555 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$11.05
0.0044300 Eth
$612.74
54.962 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0004%
98
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.94
0.0043821 Eth
$364.47
32.858 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0002%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X8F3CF7AD23CD3CADBD9735AFF958023239C6A063$10.95
0.0043829 Eth
$120.02
10.924 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0001%
100
CEX.IO
LINK-USDT$10.95
0.0043850 Eth
$18.43
1.678 LINK
0.0000%

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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