ETH Price: $2,649.84 (-5.64%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

739,135 ( 0.029%)

Market

Price

$16.26 @ 0.006136 ETH (-7.45%)

Onchain Market Cap

$16,260,000,000.00

Circulating Supply Market Cap

$10,368,509,343.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x8e324e58272f38229620a09f8b15f055d1109c99
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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 14681.82% |ETH 0.0003846 1495.42%

Market

Volume (24H):$553,269,424.00
Market Capitalization:$10,368,509,343.00
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$16.26
0.0061299 Eth
$60,264,072.00
3,615,005.400 LINK
17.3920%
2
WhiteBIT
LINK-USDT$16.29
0.0061391 Eth
$53,758,134.00
3,301,040.560 LINK
15.8815%
3
Coinbase Exchange
LINK-USD$16.25
0.0061240 Eth
$21,080,613.00
1,297,508.040 LINK
6.2424%
4
HTX
LINK-USDT$16.24
0.0061170 Eth
$14,174,716.00
841,585.276 LINK
4.0489%
5
Gate.io
LINK-USDT$16.24
0.0061189 Eth
$12,517,795.00
756,192.600 LINK
3.6381%
6
P2B
LINK-USDT$16.26
0.0061197 Eth
$11,920,046.00
733,030.790 LINK
3.5267%
7
Bybit
LINK-USDT$16.22
0.0061115 Eth
$11,776,905.00
703,229.450 LINK
3.3833%
8
KuCoin
LINK-USDT$16.24
0.0061167 Eth
$9,974,584.00
614,294.529 LINK
2.9554%
9
Bitget
LINK-USDT$16.21
0.0061069 Eth
$8,252,410.00
493,271.196 LINK
2.3732%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$16.21
0.0061057 Eth
$8,239,553.00
503,262.296 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.4212%
11
Slex
LINK-USDT$16.25
0.0061220 Eth
$8,090,936.00
483,204.450 LINK
2.3247%
12
DigiFinex
LINK-USDT$16.20
0.0061041 Eth
$7,244,337.00
447,118.830 LINK
2.1511%
13
OKX
LINK-USDT$16.21
0.0061059 Eth
$6,962,192.00
417,927.414 LINK
2.0107%
14
Binance
LINK-FDUSD$16.29
0.0061332 Eth
$6,299,527.00
376,575.420 LINK
1.8117%
15
XT.COM
LINK-USDT$16.26
0.0061317 Eth
$5,996,082.00
359,794.510 LINK
1.7310%
16
MEXC
LINK-EUR$16.26
0.0061191 Eth
$5,785,771.00
355,830.110 LINK
1.7119%
17
MEXC
LINK-USDC$16.26
0.0061203 Eth
$5,585,898.00
343,478.310 LINK
1.6525%
18
Hotcoin
LINK-USDT$16.26
0.0061317 Eth
$5,303,639.00
326,140.280 LINK
1.5691%
19
LBank
LINK-USDT$16.25
0.0061195 Eth
$5,135,726.00
316,000.990 LINK
1.5203%
20
Coinstore
LINK-USDT$16.21
0.0061157 Eth
$5,044,247.00
302,327.790 LINK
1.4545%
21
Binance
LINK-USDC$16.25
0.0061244 Eth
$4,879,276.00
292,018.670 LINK
1.4049%
22
CoinW
LINK-USDT$16.28
0.0061247 Eth
$4,522,328.00
277,851.860 LINK
1.3368%
23
Azbit
LINK-USDT$16.25
0.0061176 Eth
$3,621,271.00
217,278.687 LINK
1.0453%
24
Kraken
LINK-USD$16.24
0.0061175 Eth
$3,532,103.00
217,501.231 LINK
1.0464%
25
Bitunix
LINK-USDT$16.27
0.0061318 Eth
$3,479,079.00
213,798.780 LINK
1.0286%
26
BYDFi
LINK-USDT$16.22
0.0061115 Eth
$3,272,931.00
201,759.010 LINK
0.9707%
27
LATOKEN
LINK-USDT$16.26
0.0061299 Eth
$2,817,410.00
173,220.397 LINK
0.8334%
28
BTSE
LINK-USDT$16.25
0.0061267 Eth
$2,702,878.00
166,348.392 LINK
0.8003%
29
QMall
LINK-USDT$16.27
0.0061234 Eth
$2,455,926.00
147,234.086 LINK
0.7084%
30
Bitvavo
LINK-EUR$16.23
0.0061132 Eth
$2,204,225.00
135,780.540 LINK
0.6532%
31
FMCPAY
LINK-USDT$16.25
0.0061165 Eth
$2,185,219.00
129,947.807 LINK
0.6252%
32
Dex-Trade
LINK-USDT$16.25
0.0061176 Eth
$1,895,069.00
116,648.846 LINK
0.5612%
33
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.32
0.0061469 Eth
$1,597,777.00
97,613.862 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4696%
34
CoinEx
LINK-USDT$16.24
0.0061248 Eth
$1,459,498.00
87,799.841 LINK
0.4224%
35
Biconomy.com
LINK-USDT$16.24
0.0061108 Eth
$1,325,456.00
78,859.780 LINK
0.3794%
36
Coinbase Exchange
LINK-EUR$16.27
0.0061336 Eth
$1,279,350.00
78,620.800 LINK
0.3782%
37
Coinbase Exchange
LINK-GBP$16.20
0.0061027 Eth
$1,046,785.00
64,614.900 LINK
0.3109%
38
FMCPAY
LINK-ETH$16.25
0.0061252 Eth
$973,885.00
59,303.840 LINK
0.2853%
39
FMCPAY
LINK-BTC$16.23
0.0061147 Eth
$953,521.00
57,180.900 LINK
0.2751%
40
PointPay
LINK-USDT$16.22
0.0061107 Eth
$949,298.00
56,905.030 LINK
0.2738%
41
Bitbank
LINK-JPY$16.23
0.0061122 Eth
$760,579.00
46,859.866 LINK
0.2254%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$16.21
0.0060993 Eth
$707,480.00
42,598.977 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2049%
43
EXMO
LINK-USDT$16.25
0.0061221 Eth
$679,245.00
41,794.879 LINK
0.2011%
44
tanX
LINK-USDC$16.26
0.0061283 Eth
$665,502.00
39,425.210 LINK
0.1897%
45
BigONE
LINK-USDT$16.32
0.0061430 Eth
$663,237.00
40,627.790 LINK
0.1955%
46
WhiteBIT
LINK-BTC$16.26
0.0061195 Eth
$526,386.00
32,373.930 LINK
0.1558%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$16.22
0.0061031 Eth
$523,967.00
31,902.666 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1535%
48
LATOKEN
LINK-BTC$16.30
0.0061368 Eth
$498,163.00
30,568.806 LINK
0.1471%
49
Gemini
LINK-USD$16.23
0.0061129 Eth
$490,043.00
30,201.383 LINK
0.1453%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.32
0.0061418 Eth
$442,581.00
27,160.705 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1307%
51
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.21
0.0060993 Eth
$418,413.00
432,298.811 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.0798%
52
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.23
0.0061158 Eth
$399,321.00
24,398.542 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1174%
53
QMall
LINK-USDC$16.22
0.0061097 Eth
$394,143.00
23,591.916 LINK
0.1135%
54
OKX
LINK-USDC$16.21
0.0061042 Eth
$337,541.00
20,414.674 LINK
0.0982%
55
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$16.34
0.0061515 Eth
$313,588.00
19,058.053 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0917%
56
Binance
LINK-TRY$16.28
0.0061331 Eth
$311,955.00
18,707.810 LINK
0.0900%
57
XT.COM
LINK-ETH$16.30
0.0061347 Eth
$310,286.00
18,883.660 LINK
0.0909%
58
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$16.30
0.0061403 Eth
$291,055.00
17,374.722 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0836%
59
BitMart
LINK-BTC$16.27
0.0061224 Eth
$278,258.00
17,105.400 LINK
0.0823%
60
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$16.18
0.0060889 Eth
$277,224.00
33,272.277 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1601%
61
BitStorage
LINK-ETH$16.23
0.0061208 Eth
$247,748.00
15,262.160 LINK
0.0734%
62
Slex
LINK-ETH$16.30
0.0061347 Eth
$237,836.00
14,452.400 LINK
0.0695%
63
Coinbase Exchange
LINK-BTC$16.28
0.0061253 Eth
$207,159.00
12,727.610 LINK
0.0612%
64
BitDelta
LINK-USDT$16.23
0.0061090 Eth
$201,034.00
11,970.000 LINK
0.0576%
65
Bybit
LINK-USDC$16.23
0.0061153 Eth
$199,912.00
11,851.208 LINK
0.0570%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.27
0.0061225 Eth
$188,488.00
11,516.559 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0554%
67
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.22
0.0061064 Eth
$187,205.00
11,429.100 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0550%
68
Hotcoin
LINK-BTC$16.27
0.0061250 Eth
$181,183.00
11,133.580 LINK
0.0536%
69
Bitci TR
LINK-TRY$16.19
0.0060984 Eth
$167,015.00
9,861.240 LINK
0.0474%
70
BYDFi
LINK-USDC$16.25
0.0061174 Eth
$165,820.00
10,207.290 LINK
0.0491%
71
Bybit
LINK-EUR$16.22
0.0061112 Eth
$164,590.00
9,830.950 LINK
0.0473%
72
Kraken
LINK-GBP$16.23
0.0061132 Eth
$162,810.00
10,032.534 LINK
0.0483%
73
CoinTR
LINK-TRY$16.27
0.0061228 Eth
$158,041.00
9,357.320 LINK
0.0450%
74
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.25
0.0061169 Eth
$150,658.00
9,492.937 0X5947BB275C521040051D82396192181B413227A3
0.0457%
75
bitcastle
LINK-USDT$16.27
0.0061226 Eth
$126,872.00
7,597.670 LINK
0.0366%
76
KuCoin
LINK-USDC$16.20
0.0061029 Eth
$123,119.00
7,599.627 LINK
0.0366%
77
WhiteBIT
LINK-TRY$16.28
0.0061319 Eth
$118,732.00
7,294.130 LINK
0.0351%
78
BitMart
LINK-ETH$16.27
0.0061285 Eth
$98,436.00
6,051.160 LINK
0.0291%
79
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$16.23
0.0061087 Eth
$95,871.00
5,655.073 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0272%
80
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$16.27
0.0061252 Eth
$91,914.00
5,610.532 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0270%
81
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$16.26
0.0061269 Eth
$73,406.00
4,405.082 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0212%
82
Bitso
LINK-USD$16.24
0.0061114 Eth
$70,529.00
4,343.034 LINK
0.0209%
83
Binance US
LINK-USDT$16.23
0.0061101 Eth
$66,404.00
4,092.457 LINK
0.0197%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$16.32
0.0061472 Eth
$54,205.00
55,902.237 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2689%
85
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$16.34
0.0061530 Eth
$54,014.00
3,298.203 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0159%
86
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.27
0.0061257 Eth
$51,085.00
3,121.247 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0150%
87
Hotcoin
LINK-ETH$16.25
0.0061278 Eth
$50,482.00
3,106.310 LINK
0.0149%
88
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.22
0.0061079 Eth
$43,870.00
45,552.133 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2192%
89
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.23
0.0061162 Eth
$42,863.00
2,686.471 0X5947BB275C521040051D82396192181B413227A3
0.0129%
90
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$16.25
0.0061155 Eth
$33,166.00
1,981.627 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0095%
91
Dex-Trade
LINK-ETH$16.23
0.0061152 Eth
$32,587.00
2,007.430 LINK
0.0097%
92
Indodax
LINK-IDR$16.39
0.0061712 Eth
$31,283.00
1,908.827 LINK
0.0092%
93
Bitexen
LINK-TRY$16.17
0.0060944 Eth
$28,729.00
1,777.070 LINK
0.0085%
94
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.25
0.0061149 Eth
$21,732.00
1,355.687 0X5947BB275C521040051D82396192181B413227A3
0.0065%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$16.21
0.0060993 Eth
$15,858.88
967.945 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0047%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$16.23
0.0061079 Eth
$15,604.99
954.710 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0046%
97
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$16.27
0.0061237 Eth
$15,331.74
903.436 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0043%
98
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$16.26
0.0061207 Eth
$14,926.61
910.913 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0044%
99
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.30
0.0061354 Eth
$13,334.58
811.216 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0039%
100
Bittime
LINK-USDT$16.21
0.0061029 Eth
$11,629.94
706.090 LINK
0.0034%

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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