ETH Price: $2,410.06 (-0.97%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,423 ( 0.003%)

Market

Price

$11.35 @ 0.004709 ETH (+1.55%)

Onchain Market Cap

$11,350,000,000.00

Circulating Supply Market Cap

$7,112,519,890.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
82.25 LINK

Value
$933.54 ( ~0.387351213915954 Eth) [0.0000%]
0x9822c9d97dd24f9d2Bc0C594cBBBdc245030C8Fe
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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 10218.18% |ETH 0.0003846 1124.39%

Market

Volume (24H):$279,273,696.00
Market Capitalization:$7,112,519,890.00
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
LBank
LINK-USDT$11.32
0.0046932 Eth
$31,189,540.00
2,755,147.780 LINK
19.8632%
2
Binance
LINK-USDT$11.33
0.0046951 Eth
$15,588,915.00
1,395,598.970 LINK
10.0616%
3
Coinbase Exchange
LINK-USD$11.33
0.0046940 Eth
$10,617,077.00
937,407.500 LINK
6.7582%
4
HTX
LINK-USDT$11.32
0.0046946 Eth
$10,059,758.00
900,274.852 LINK
6.4905%
5
Bitget
LINK-USDT$11.32
0.0046927 Eth
$9,330,461.00
834,728.160 LINK
6.0180%
6
Bybit
LINK-USDT$11.31
0.0046911 Eth
$8,709,532.00
778,484.848 LINK
5.6125%
7
Websea
LINK-USDT$11.34
0.0047015 Eth
$6,583,169.00
0.000 LINK
0.0000%
8
WhiteBIT
LINK-USDT$11.34
0.0046967 Eth
$5,871,539.00
517,999.440 LINK
3.7345%
9
Azbit
LINK-USDT$11.32
0.0046952 Eth
$5,407,554.00
483,555.680 LINK
3.4862%
10
Biconomy.com
LINK-USDT$11.31
0.0046910 Eth
$4,676,331.00
418,070.810 LINK
3.0141%
11
Poloniex
LINK-USDT$11.35
0.0047041 Eth
$3,585,220.00
321,192.446 LINK
2.3156%
12
BVOX
LINK-USDT$11.31
0.0046911 Eth
$3,462,845.00
309,824.500 LINK
2.2337%
13
P2B
LINK-USDT$11.32
0.0046926 Eth
$3,293,015.00
290,914.420 LINK
2.0973%
14
WEEX
LINK-USDT$11.35
0.0047035 Eth
$3,048,019.00
272,161.840 LINK
1.9621%
15
Slex
LINK-USDT$11.36
0.0047077 Eth
$2,762,386.00
247,262.240 LINK
1.7826%
16
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.28
0.0046723 Eth
$2,107,400.00
188,731.018 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.3607%
17
DigiFinex
LINK-USDT$11.32
0.0046943 Eth
$1,898,980.00
167,736.830 LINK
1.2093%
18
AscendEX (BitMax)
LINK-USDT$11.34
0.0047019 Eth
$1,719,033.00
151,633.000 LINK
1.0932%
19
OKX
LINK-USDT$11.32
0.0046932 Eth
$1,630,383.00
145,660.810 LINK
1.0501%
20
Deepcoin
LINK-USDT$11.31
0.0046894 Eth
$1,560,628.00
150,984.480 LINK
1.0885%
21
Gate.io
LINK-USDT$11.32
0.0046920 Eth
$1,546,089.00
138,500.470 LINK
0.9985%
22
KuCoin
LINK-USDT$11.32
0.0046920 Eth
$1,533,661.00
135,535.253 LINK
0.9771%
23
ProBit Global
LINK-USDT$11.36
0.0047070 Eth
$1,415,905.00
124,640.294 LINK
0.8986%
24
Trubit
LINK-USDT$11.31
0.0046896 Eth
$1,401,062.00
125,067.300 LINK
0.9017%
25
XT.COM
LINK-USDT$11.32
0.0046926 Eth
$1,388,426.00
124,287.000 LINK
0.8960%
26
Toobit
LINK-USDT$11.31
0.0046896 Eth
$1,307,072.00
117,057.520 LINK
0.8439%
27
CoinW
LINK-USDT$11.34
0.0046989 Eth
$1,306,343.00
115,218.380 LINK
0.8307%
28
C-Patex
LINK-USDT$11.36
0.0047054 Eth
$1,206,250.00
106,222.431 LINK
0.7658%
29
Oceanex
LINK-USDT$11.32
0.0046945 Eth
$1,157,280.00
102,195.960 LINK
0.7368%
30
Azbit
LINK-ETH$11.33
0.0046974 Eth
$933,618.00
83,699.238 LINK
0.6034%
31
Crypto.com Exchange
LINK-USDT$11.33
0.0046960 Eth
$903,797.00
79,804.180 LINK
0.5753%
32
BYDFi
LINK-USDT$11.36
0.0047073 Eth
$804,157.00
70,789.110 LINK
0.5104%
33
FMCPAY
LINK-USDT$11.32
0.0046932 Eth
$796,541.00
71,263.796 LINK
0.5138%
34
BloFin
LINK-USDT$11.33
0.0046951 Eth
$728,542.00
65,141.660 LINK
0.4696%
35
FMFW.io
LINK-USDT$11.32
0.0046943 Eth
$645,292.00
56,985.900 LINK
0.4108%
36
HitBTC
LINK-USDT$11.31
0.0046907 Eth
$636,608.00
56,975.410 LINK
0.4108%
37
FameEX
LINK-USDT$11.34
0.0046979 Eth
$620,221.00
55,523.408 LINK
0.4003%
38
BTSE
LINK-USDT$11.34
0.0046971 Eth
$587,969.00
51,867.750 LINK
0.3739%
39
tanX
LINK-USDC$11.32
0.0046901 Eth
$550,159.00
49,221.630 LINK
0.3549%
40
Bitvavo
LINK-EUR$11.33
0.0046965 Eth
$547,866.00
48,368.850 LINK
0.3487%
41
Kraken
LINK-USDT$11.30
0.0046837 Eth
$520,287.00
46,059.603 LINK
0.3321%
42
Kraken
LINK-USD$11.32
0.0046914 Eth
$517,764.00
45,754.430 LINK
0.3299%
43
FMCPAY
LINK-ETH$11.34
0.0047002 Eth
$462,641.00
41,615.360 LINK
0.3000%
44
FMCPAY
LINK-BTC$11.31
0.0046905 Eth
$459,335.00
41,149.200 LINK
0.2967%
45
Crypto.com Exchange
LINK-USD$11.33
0.0046972 Eth
$422,104.00
37,262.030 LINK
0.2686%
46
Coinbase Exchange
LINK-USDT$11.33
0.0046976 Eth
$397,718.00
35,105.646 LINK
0.2531%
47
MEXC
LINK-USDT$11.32
0.0046934 Eth
$375,401.00
33,165.870 LINK
0.2391%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.34
0.0047003 Eth
$358,707.00
32,228.962 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2324%
49
CoinEx
LINK-USDT$11.33
0.0046965 Eth
$346,591.00
31,023.311 LINK
0.2237%
50
WhiteBIT
LINK-BTC$11.36
0.0047055 Eth
$303,502.00
26,725.640 LINK
0.1927%
51
Bithumb
LINK-KRW$11.37
0.0047163 Eth
$270,398.00
23,772.262 LINK
0.1714%
52
Bitstamp
LINK-EUR$11.34
0.0047040 Eth
$267,398.00
23,570.943 LINK
0.1699%
53
EXMO
LINK-USDT$11.31
0.0046893 Eth
$267,064.00
23,620.819 LINK
0.1703%
54
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.25
0.0046657 Eth
$233,609.00
21,038.735 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1517%
55
PointPay
LINK-USDT$11.35
0.0047029 Eth
$224,441.00
20,091.620 LINK
0.1449%
56
Pionex
LINK-USDT$11.33
0.0046962 Eth
$214,995.00
19,241.030 LINK
0.1387%
57
ProBit Global
LINK-BTC$11.34
0.0047003 Eth
$211,370.00
18,633.082 LINK
0.1343%
58
BigONE
LINK-USDT$11.30
0.0046819 Eth
$211,098.00
18,682.490 LINK
0.1347%
59
WhiteBIT
LINK-EUR$11.35
0.0047015 Eth
$185,818.00
16,378.140 LINK
0.1181%
60
BitMart
LINK-BTC$11.36
0.0047074 Eth
$182,205.00
16,046.020 LINK
0.1157%
61
Phemex
LINK-USDT$11.31
0.0046891 Eth
$179,132.00
15,839.910 LINK
0.1142%
62
Kraken
LINK-EUR$11.30
0.0046841 Eth
$153,319.00
13,569.979 LINK
0.0978%
63
Bit2Me
LINK-EUR$11.30
0.0046860 Eth
$148,899.00
13,300.218 LINK
0.0959%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.35
0.0047054 Eth
$147,917.00
13,217.969 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0953%
65
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.25
0.0046657 Eth
$139,148.00
12,479.061 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0900%
66
LATOKEN
LINK-BTC$11.34
0.0047009 Eth
$134,778.00
11,886.063 LINK
0.0857%
67
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.34
0.0047006 Eth
$133,162.00
11,952.839 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0862%
68
BitDelta
LINK-USDT$11.33
0.0046953 Eth
$114,523.00
10,241.000 LINK
0.0738%
69
Bitci TR
LINK-TRY$11.44
0.0047437 Eth
$112,952.00
10,055.530 LINK
0.0725%
70
Coinbase Exchange
LINK-ETH$11.32
0.0046926 Eth
$96,847.00
8,556.100 LINK
0.0617%
71
Slex
LINK-BTC$11.34
0.0047006 Eth
$70,467.00
6,291.800 LINK
0.0454%
72
Slex
LINK-ETH$11.36
0.0047062 Eth
$70,336.00
6,292.450 LINK
0.0454%
73
OKX
LINK-USDC$11.34
0.0046993 Eth
$65,608.00
5,888.506 LINK
0.0425%
74
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.35
0.0047034 Eth
$65,229.00
5,767.488 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0416%
75
GMO Japan
LINK-JPY$11.32
0.0046940 Eth
$58,322.00
5,150.800 LINK
0.0371%
76
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.35
0.0047065 Eth
$39,245.00
38,693.316 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2790%
77
PancakeSwap V1 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.31
0.0046885 Eth
$28,762.00
5,029.457 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0363%
78
EXMO
LINK-BTC$11.36
0.0047129 Eth
$25,804.00
2,270.813 LINK
0.0164%
79
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.35
0.0047041 Eth
$24,286.00
2,173.211 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0157%
80
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.25
0.0046660 Eth
$22,917.00
22,673.634 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1635%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.36
0.0047076 Eth
$21,358.00
1,911.761 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0138%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.35
0.0047038 Eth
$20,923.00
1,872.129 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0135%
83
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.36
0.0047093 Eth
$17,483.43
17,202.600 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1240%
84
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.25
0.0046657 Eth
$16,145.26
1,446.645 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0104%
85
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.32
0.0046939 Eth
$13,690.89
1,225.401 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0088%
86
Bitlo
LINK-TRY$11.41
0.0047341 Eth
$12,637.73
1,116.945 LINK
0.0081%
87
CoinEx
LINK-USDC$11.35
0.0047036 Eth
$10,807.51
967.132 LINK
0.0070%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.34
0.0047004 Eth
$8,039.39
717.246 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0052%
89
CoinEx
LINK-BTC$11.32
0.0046903 Eth
$5,823.53
520.001 LINK
0.0037%
90
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.25
0.0046655 Eth
$3,684.14
3,637.648 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0262%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$11.34
0.0046980 Eth
$3,212.62
286.729 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0021%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$11.29
0.0046788 Eth
$2,014.18
180.090 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0013%
93
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.25
0.0046618 Eth
$1,916.44
173.078 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0012%
94
Quickswap
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.39
0.0047189 Eth
$1,373.45
104.139 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0008%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.31
0.0046878 Eth
$722.97
64.629 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.37
0.0047119 Eth
$639.56
56.580 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$11.30
0.0046816 Eth
$533.41
48.939 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0004%
98
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.25
0.0046657 Eth
$455.18
813.382 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0059%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.35
0.0047052 Eth
$245.30
21.815 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0002%
100
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$11.28
0.0046657 Eth
$151.98
13.581 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0001%

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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