ETH Price: $2,435.20 (-0.85%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,506 ( 0.000%)

Market

Price

$10.50 @ 0.004312 ETH (-1.44%)

Onchain Market Cap

$10,500,000,000.00

Circulating Supply Market Cap

$6,563,658,886.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
70.03646 LINK

Value
$735.38 ( ~0.301979337713637 Eth) [0.0000%]
0x7F0FD0400a2f3E81A182E1d7DF28DB94D406c4F2
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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 9445.45% |ETH 0.0003846 1021.16%

Market

Volume (24H):$460,727,820.00
Market Capitalization:$6,563,658,886.00
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
Binance
LINK-USDT$10.50
0.0042997 Eth
$34,121,695.00
3,279,930.900 LINK
16.6135%
2
WhiteBIT
LINK-USDT$10.51
0.0043141 Eth
$32,438,817.00
3,086,933.480 LINK
15.6360%
3
HTX
LINK-USDT$10.50
0.0043118 Eth
$11,770,826.00
1,130,177.151 LINK
5.7246%
4
Coinbase Exchange
LINK-USD$10.50
0.0043102 Eth
$10,701,095.00
1,019,248.950 LINK
5.1627%
5
Gate.io
LINK-USDT$10.51
0.0043125 Eth
$10,346,325.00
1,013,013.730 LINK
5.1311%
6
Bitget
LINK-USDT$10.51
0.0043133 Eth
$9,367,615.00
898,526.984 LINK
4.5512%
7
Bybit
LINK-USDT$10.51
0.0043134 Eth
$9,289,861.00
894,035.710 LINK
4.5285%
8
OKX
LINK-USDT$10.51
0.0043137 Eth
$7,142,063.00
690,030.355 LINK
3.4951%
9
P2B
LINK-USDT$10.51
0.0043162 Eth
$7,066,863.00
672,167.280 LINK
3.4047%
10
Slex
LINK-USDT$10.51
0.0043160 Eth
$5,954,724.00
571,401.290 LINK
2.8943%
11
BTSE
LINK-USDT$10.51
0.0043140 Eth
$5,846,817.00
556,340.114 LINK
2.8180%
12
DigiFinex
LINK-USDT$10.50
0.0043121 Eth
$4,649,250.00
442,637.960 LINK
2.2421%
13
Bitunix
LINK-USDT$10.50
0.0043101 Eth
$4,372,486.00
416,563.800 LINK
2.1100%
14
Biconomy.com
LINK-USDT$10.51
0.0043135 Eth
$3,839,045.00
369,311.900 LINK
1.8706%
15
Azbit
LINK-USDT$10.51
0.0043039 Eth
$3,604,187.00
344,430.270 LINK
1.7446%
16
CoinW
LINK-USDT$10.51
0.0043128 Eth
$3,568,442.00
339,682.680 LINK
1.7206%
17
XT.COM
LINK-USDT$10.51
0.0043063 Eth
$3,425,298.00
329,365.850 LINK
1.6683%
18
Hotcoin
LINK-USDT$10.49
0.0043070 Eth
$2,846,397.00
271,309.100 LINK
1.3742%
19
Coinstore
LINK-USDT$10.51
0.0043131 Eth
$2,284,784.00
219,719.850 LINK
1.1129%
20
Trubit
LINK-USDT$10.51
0.0043151 Eth
$2,249,752.00
216,584.420 LINK
1.0970%
21
LBank
LINK-USDT$10.50
0.0043116 Eth
$2,111,590.00
201,041.920 LINK
1.0183%
22
KuCoin
LINK-USDT$10.51
0.0043123 Eth
$1,979,064.00
188,392.537 LINK
0.9542%
23
AscendEX (BitMax)
LINK-USDT$10.48
0.0043031 Eth
$1,764,255.00
168,319.800 LINK
0.8526%
24
BYDFi
LINK-USDT$10.51
0.0043063 Eth
$1,717,548.00
163,385.080 LINK
0.8276%
25
Bitvavo
LINK-EUR$10.50
0.0043038 Eth
$1,439,450.00
137,122.079 LINK
0.6946%
26
ProBit Global
LINK-USDT$10.51
0.0043045 Eth
$1,342,384.00
127,727.668 LINK
0.6470%
27
WhiteBIT
LINK-BTC$10.51
0.0043138 Eth
$1,175,067.00
111,779.660 LINK
0.5662%
28
Dex-Trade
LINK-USDT$10.50
0.0043021 Eth
$1,126,802.00
107,290.960 LINK
0.5435%
29
Tokpie
LINK-USDT$10.49
0.0043052 Eth
$916,777.00
87,367.192 LINK
0.4425%
30
HashKey Global
LINK-USDT$10.50
0.0043091 Eth
$906,688.00
87,955.661 LINK
0.4455%
31
Azbit
LINK-ETH$10.51
0.0043091 Eth
$699,034.00
66,832.969 LINK
0.3385%
32
EXMO
LINK-USDT$10.51
0.0043132 Eth
$689,716.00
65,648.117 LINK
0.3325%
33
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.44
0.0042871 Eth
$670,697.00
64,393.594 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3262%
34
LATOKEN
LINK-USDT$10.50
0.0042985 Eth
$669,194.00
63,708.680 LINK
0.3227%
35
AscendEX (BitMax)
LINK-BTC$10.50
0.0043095 Eth
$578,077.00
55,070.100 LINK
0.2789%
36
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.45
0.0042908 Eth
$561,996.00
53,932.140 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2732%
37
BigONE
LINK-USDT$10.48
0.0043030 Eth
$538,408.00
51,366.250 LINK
0.2602%
38
Kraken
LINK-USDT$10.51
0.0043152 Eth
$515,502.00
49,043.914 LINK
0.2484%
39
CoinEx
LINK-USDT$10.49
0.0043015 Eth
$502,742.00
48,285.487 LINK
0.2446%
40
itBit
LINK-USD$10.45
0.0043148 Eth
$476,560.00
45,603.801 LINK
0.2310%
41
ProBit Global
LINK-BTC$10.51
0.0043131 Eth
$454,038.00
43,215.677 LINK
0.2189%
42
PointPay
LINK-USDT$10.50
0.0043111 Eth
$440,713.00
42,418.148 LINK
0.2149%
43
WhiteBIT
LINK-EUR$10.52
0.0043100 Eth
$409,081.00
38,874.510 LINK
0.1969%
44
Coinbase Exchange
LINK-USDT$10.46
0.0042955 Eth
$385,668.00
36,856.219 LINK
0.1867%
45
Phemex
LINK-USDT$10.52
0.0043073 Eth
$352,115.00
33,461.540 LINK
0.1695%
46
Bybit
LINK-USDC$10.51
0.0043130 Eth
$349,615.00
33,593.102 LINK
0.1702%
47
Nonkyc.io
LINK-USDT$10.47
0.0042993 Eth
$336,058.00
31,889.789 LINK
0.1615%
48
EarnBIT
LINK-USDT$10.51
0.0043131 Eth
$331,001.00
32,015.917 LINK
0.1622%
49
Coinbase Exchange
LINK-EUR$10.52
0.0043136 Eth
$316,840.00
30,125.440 LINK
0.1526%
50
WhiteBIT
LINK-TRY$10.54
0.0043172 Eth
$314,058.00
29,800.660 LINK
0.1509%
51
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.45
0.0042902 Eth
$306,516.00
29,423.169 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1490%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.53
0.0043234 Eth
$306,079.00
28,958.257 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1467%
53
LATOKEN
LINK-BTC$10.51
0.0043054 Eth
$250,698.00
23,857.661 LINK
0.1208%
54
Binance
LINK-EUR$10.52
0.0043182 Eth
$215,688.00
20,636.880 LINK
0.1045%
55
BitMart
LINK-BTC$10.50
0.0043117 Eth
$197,962.00
18,846.520 LINK
0.0955%
56
BitDelta
LINK-USDT$10.49
0.0043011 Eth
$193,323.00
18,586.000 LINK
0.0941%
57
Slex
LINK-ETH$10.52
0.0043169 Eth
$185,692.00
17,762.720 LINK
0.0900%
58
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.53
0.0043219 Eth
$171,743.00
170,216.135 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.8622%
59
Bitbank
LINK-JPY$10.53
0.0043190 Eth
$167,546.00
15,918.710 LINK
0.0806%
60
BYDFi
LINK-USDC$10.51
0.0043033 Eth
$159,613.00
15,181.990 LINK
0.0769%
61
Gemini
LINK-USD$10.53
0.0043231 Eth
$145,518.00
13,818.229 LINK
0.0700%
62
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$10.45
0.0042917 Eth
$138,789.00
13,235.327 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0670%
63
OKX
LINK-USDC$10.50
0.0043103 Eth
$121,446.00
11,687.492 LINK
0.0592%
64
GMO Japan
LINK-JPY$10.54
0.0043274 Eth
$119,149.00
11,303.400 LINK
0.0573%
65
Coinbase Exchange
LINK-GBP$10.48
0.0042992 Eth
$114,188.00
10,893.440 LINK
0.0552%
66
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$10.50
0.0043099 Eth
$112,560.00
10,829.663 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0549%
67
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$10.50
0.0043127 Eth
$107,547.00
10,321.209 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0523%
68
Bitci TR
LINK-TRY$10.58
0.0043443 Eth
$106,378.00
10,156.520 LINK
0.0514%
69
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.45
0.0042884 Eth
$100,504.00
99,869.987 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5059%
70
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$10.44
0.0042871 Eth
$92,552.00
9,171.345 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0465%
71
Bitkub
LINK-THB$10.45
0.0042834 Eth
$81,928.00
7,838.592 LINK
0.0397%
72
Slex
LINK-BTC$10.51
0.0043160 Eth
$73,264.00
6,976.900 LINK
0.0353%
73
Mercado Bitcoin
LINK-BRL$10.59
0.0043440 Eth
$73,030.00
6,898.735 LINK
0.0349%
74
Bitso
LINK-USD$10.50
0.0043110 Eth
$62,894.00
5,988.839 LINK
0.0303%
75
Kraken
LINK-GBP$10.46
0.0042933 Eth
$61,908.00
5,919.821 LINK
0.0300%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.53
0.0043219 Eth
$60,180.00
5,790.341 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0293%
77
PointPay
LINK-BTC$10.51
0.0043132 Eth
$48,671.00
4,638.275 LINK
0.0235%
78
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$10.50
0.0043124 Eth
$39,299.00
3,865.205 0X5947BB275C521040051D82396192181B413227A3
0.0196%
79
Coinbase Exchange
LINK-ETH$10.50
0.0043121 Eth
$38,901.00
3,703.120 LINK
0.0188%
80
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.50
0.0043064 Eth
$38,307.00
3,668.501 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0186%
81
Binance US
LINK-USDT$10.49
0.0043080 Eth
$32,029.00
3,052.239 LINK
0.0155%
82
Coinbase Exchange
LINK-BTC$10.52
0.0043121 Eth
$31,685.00
3,013.180 LINK
0.0153%
83
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.51
0.0043087 Eth
$29,310.00
29,037.609 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1471%
84
Coinone
LINK-KRW$10.59
0.0043480 Eth
$25,683.00
2,424.744 LINK
0.0123%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$10.50
0.0043122 Eth
$25,085.00
2,394.718 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0121%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$10.45
0.0042905 Eth
$22,473.00
2,154.568 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0109%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$10.51
0.0043163 Eth
$22,279.00
2,113.877 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0107%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD93F7E271CB87C23AAA73EDC008A79646D1F9912$10.50
0.0043108 Eth
$18,909.21
1,791.531 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0091%
89
CoinEx
LINK-USDC$10.47
0.0042979 Eth
$18,576.00
1,786.559 LINK
0.0090%
90
CoinEx
LINK-BTC$10.50
0.0043013 Eth
$17,624.71
1,684.219 LINK
0.0085%
91
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$10.46
0.0042942 Eth
$17,314.90
1,656.503 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0084%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$10.49
0.0042928 Eth
$16,983.73
1,642.934 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0083%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$10.44
0.0042874 Eth
$12,230.89
1,163.114 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0059%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$10.49
0.0043031 Eth
$12,082.67
1,154.635 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0058%
95
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$10.44
0.0042871 Eth
$11,609.79
11,573.113 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0586%
96
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$10.48
0.0043029 Eth
$9,497.31
15.610 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$10.50
0.0043062 Eth
$9,091.22
871.235 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0044%
98
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$10.45
0.0042916 Eth
$6,904.89
52.632 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0003%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$10.51
0.0043104 Eth
$6,627.42
637.027 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0032%
100
KuCoin
LINK-KCS$10.50
0.0043102 Eth
$4,345.91
413.896 LINK
0.0021%

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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