ETH Price: $2,678.88 (-2.55%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

737,607 ( 0.044%)

Market

Price

$17.71 @ 0.006611 ETH (-3.07%)

Onchain Market Cap

$17,710,000,000.00

Circulating Supply Market Cap

$11,316,360,533.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xee26c711ca99e2bbe7306baac350f62792f42e06
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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 16000% |ETH 0.0003846 1618.93%

Market

Volume (24H):$658,044,331.00
Market Capitalization:$11,316,360,533.00
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$17.79
0.0066392 Eth
$69,288,479.00
3,770,593.670 LINK
14.8568%
2
WhiteBIT
LINK-USDT$17.70
0.0066014 Eth
$68,050,621.00
3,844,560.580 LINK
15.1483%
3
Bybit
LINK-USDT$17.60
0.0065702 Eth
$49,967,063.00
2,740,503.414 LINK
10.7981%
4
MEXC
LINK-USDT$17.74
0.0066076 Eth
$37,019,074.00
2,086,626.930 LINK
8.2217%
5
Coinbase Exchange
LINK-USD$17.69
0.0065982 Eth
$23,514,911.00
1,329,126.770 LINK
5.2370%
6
HTX
LINK-USDT$17.69
0.0066007 Eth
$18,292,668.00
997,621.530 LINK
3.9308%
7
P2B
LINK-USDT$17.68
0.0065938 Eth
$12,204,157.00
690,280.780 LINK
2.7198%
8
Gate.io
LINK-USDT$17.71
0.0066091 Eth
$10,386,738.00
564,965.460 LINK
2.2261%
9
DigiFinex
LINK-USDT$17.69
0.0066044 Eth
$8,334,168.00
470,994.910 LINK
1.8558%
10
OKX
LINK-USDT$17.69
0.0066019 Eth
$8,317,802.00
452,478.204 LINK
1.7828%
11
Slex
LINK-USDT$17.74
0.0066076 Eth
$8,221,450.00
445,908.040 LINK
1.7570%
12
XT.COM
LINK-USDT$17.70
0.0066053 Eth
$6,833,310.00
372,094.710 LINK
1.4661%
13
KuCoin
LINK-USDT$17.69
0.0066043 Eth
$6,508,135.00
367,805.174 LINK
1.4492%
14
MEXC
LINK-EUR$17.73
0.0066085 Eth
$6,399,085.00
360,979.750 LINK
1.4223%
15
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.80
0.0066370 Eth
$6,226,416.00
348,045.487 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.3714%
16
MEXC
LINK-USDC$17.74
0.0066118 Eth
$6,140,263.00
346,203.170 LINK
1.3641%
17
LBank
LINK-USDT$17.80
0.0066423 Eth
$5,988,750.00
336,403.300 LINK
1.3255%
18
Coinstore
LINK-USDT$17.68
0.0065974 Eth
$5,928,804.00
322,906.570 LINK
1.2723%
19
Binance
LINK-FDUSD$17.68
0.0065995 Eth
$5,607,758.00
304,964.820 LINK
1.2016%
20
Binance
LINK-USDC$17.70
0.0066121 Eth
$5,266,993.00
286,630.240 LINK
1.1294%
21
CoinW
LINK-USDT$17.69
0.0066028 Eth
$5,121,965.00
289,530.040 LINK
1.1408%
22
Kraken
LINK-USD$17.70
0.0066034 Eth
$5,064,895.00
286,203.696 LINK
1.1277%
23
Bitunix
LINK-USDT$17.71
0.0065990 Eth
$4,414,868.00
249,417.970 LINK
0.9828%
24
Azbit
LINK-USDT$17.74
0.0066264 Eth
$4,126,293.00
224,538.838 LINK
0.8847%
25
BTSE
LINK-USDT$17.76
0.0066170 Eth
$3,905,013.00
219,926.667 LINK
0.8666%
26
BYDFi
LINK-USDT$17.77
0.0066254 Eth
$3,779,340.00
212,691.870 LINK
0.8380%
27
LATOKEN
LINK-USDT$17.75
0.0066133 Eth
$3,129,594.00
176,355.081 LINK
0.6949%
28
Bitvavo
LINK-EUR$17.78
0.0066288 Eth
$3,016,566.00
169,677.921 LINK
0.6686%
29
QMall
LINK-USDT$17.77
0.0066258 Eth
$2,808,585.00
152,733.982 LINK
0.6018%
30
FMCPAY
LINK-USDT$17.68
0.0065982 Eth
$2,270,539.00
123,751.817 LINK
0.4876%
31
Dex-Trade
LINK-USDT$17.71
0.0066095 Eth
$2,036,276.00
114,980.787 LINK
0.4530%
32
Coinbase Exchange
LINK-GBP$17.68
0.0066001 Eth
$1,872,111.00
105,870.140 LINK
0.4171%
33
Biconomy.com
LINK-USDT$17.73
0.0066110 Eth
$1,422,791.00
77,478.860 LINK
0.3053%
34
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.76
0.0066221 Eth
$1,360,702.00
76,070.151 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2997%
35
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.77
0.0066289 Eth
$1,300,430.00
72,852.108 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2871%
36
CoinEx
LINK-USDT$17.70
0.0066028 Eth
$1,241,484.00
68,024.001 LINK
0.2680%
37
Coinbase Exchange
LINK-EUR$17.67
0.0065969 Eth
$1,203,767.00
68,106.780 LINK
0.2684%
38
PointPay
LINK-USDT$17.79
0.0066361 Eth
$1,121,031.00
60,980.556 LINK
0.2403%
39
FMCPAY
LINK-ETH$17.74
0.0066177 Eth
$1,036,022.00
58,045.280 LINK
0.2287%
40
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.76
0.0066218 Eth
$1,005,218.00
56,299.888 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2218%
41
FMCPAY
LINK-BTC$17.76
0.0066260 Eth
$1,000,902.00
55,434.400 LINK
0.2184%
42
Trubit
LINK-USDT$17.73
0.0066077 Eth
$825,033.00
44,987.790 LINK
0.1773%
43
BigONE
LINK-USDT$17.71
0.0066020 Eth
$803,051.00
45,345.470 LINK
0.1787%
44
tanX
LINK-USDC$17.68
0.0065979 Eth
$776,979.00
42,425.620 LINK
0.1672%
45
Gemini
LINK-USD$17.74
0.0066224 Eth
$758,688.00
42,759.762 LINK
0.1685%
46
EXMO
LINK-USDT$17.70
0.0066033 Eth
$632,219.00
35,725.775 LINK
0.1408%
47
Binance
LINK-TRY$17.73
0.0066182 Eth
$593,873.00
32,447.440 LINK
0.1278%
48
LATOKEN
LINK-BTC$17.78
0.0066287 Eth
$558,986.00
31,436.997 LINK
0.1239%
49
Bitbank
LINK-JPY$17.77
0.0066282 Eth
$554,316.00
31,189.797 LINK
0.1229%
50
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.79
0.0066331 Eth
$541,548.00
560,983.661 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.2104%
51
BitStorage
LINK-USDT$17.70
0.0066003 Eth
$539,019.00
30,457.200 LINK
0.1200%
52
WhiteBIT
LINK-BTC$17.71
0.0066039 Eth
$527,674.00
29,799.790 LINK
0.1174%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.69
0.0065977 Eth
$516,639.00
28,121.414 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1108%
54
Bybit
LINK-USDC$17.61
0.0065735 Eth
$430,066.00
23,691.595 LINK
0.0933%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.72
0.0066070 Eth
$427,910.00
24,225.222 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0955%
56
QMall
LINK-USDC$17.70
0.0066216 Eth
$426,790.00
23,238.995 LINK
0.0916%
57
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.67
0.0065886 Eth
$417,613.00
46,709.636 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1840%
58
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.76
0.0066222 Eth
$363,798.00
375,667.020 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
1.4802%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.66
0.0065873 Eth
$355,530.00
19,914.452 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0785%
60
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.77
0.0066273 Eth
$347,753.00
18,971.902 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0748%
61
NovaDAX
LINK-BRL$17.85
0.0066605 Eth
$328,825.00
18,425.275 LINK
0.0726%
62
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.79
0.0066398 Eth
$302,242.00
16,681.306 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0657%
63
BitMart
LINK-BTC$17.72
0.0066134 Eth
$295,271.00
16,664.220 LINK
0.0657%
64
Mercado Bitcoin
LINK-BRL$17.76
0.0066300 Eth
$252,671.00
14,223.235 LINK
0.0560%
65
GMO Japan
LINK-JPY$17.82
0.0066452 Eth
$251,053.00
14,087.000 LINK
0.0555%
66
Coinbase Exchange
LINK-BTC$17.73
0.0066173 Eth
$220,011.00
12,408.590 LINK
0.0489%
67
Hotcoin
LINK-BTC$17.74
0.0066063 Eth
$219,359.00
12,367.010 LINK
0.0487%
68
BitDelta
LINK-USDT$17.77
0.0066329 Eth
$208,471.00
11,368.000 LINK
0.0448%
69
BYDFi
LINK-USDC$17.62
0.0065805 Eth
$194,332.00
11,030.310 LINK
0.0435%
70
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.80
0.0066370 Eth
$188,466.00
10,243.909 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0404%
71
Bitci TR
LINK-TRY$17.88
0.0066759 Eth
$184,293.00
10,087.510 LINK
0.0397%
72
Bitkub
LINK-THB$17.77
0.0066243 Eth
$184,250.00
10,368.929 LINK
0.0409%
73
BitStorage
LINK-ETH$17.79
0.0066256 Eth
$175,953.00
9,890.940 LINK
0.0390%
74
OKX
LINK-USDC$17.70
0.0066082 Eth
$165,296.00
9,021.879 LINK
0.0355%
75
Bitbegin
LINK-USDT$17.78
0.0066284 Eth
$160,882.00
8,771.876 LINK
0.0346%
76
Slex
LINK-ETH$17.78
0.0066216 Eth
$158,068.00
8,834.820 LINK
0.0348%
77
WhiteBIT
LINK-TRY$17.73
0.0066125 Eth
$145,618.00
8,212.890 LINK
0.0324%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.72
0.0066080 Eth
$142,957.00
8,004.640 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0315%
79
CoinTR
LINK-TRY$17.76
0.0066295 Eth
$121,621.00
6,663.490 LINK
0.0263%
80
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.77
0.0066303 Eth
$119,795.00
6,516.154 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0257%
81
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.76
0.0066293 Eth
$113,454.00
117,711.072 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4638%
82
Binance US
LINK-USDT$17.73
0.0066114 Eth
$110,358.00
6,225.245 LINK
0.0245%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.77
0.0066289 Eth
$99,948.00
103,238.352 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4068%
84
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.82
0.0066478 Eth
$97,335.00
5,447.546 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0215%
85
KuCoin
LINK-USDC$17.69
0.0066022 Eth
$96,654.00
5,464.107 LINK
0.0215%
86
BitMart
LINK-ETH$17.72
0.0066157 Eth
$93,126.00
5,253.940 LINK
0.0207%
87
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.75
0.0066258 Eth
$83,392.00
4,659.258 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0184%
88
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.72
0.0066087 Eth
$75,345.00
4,182.388 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0165%
89
Bitso
LINK-USD$17.73
0.0066037 Eth
$67,607.00
3,813.000 LINK
0.0150%
90
Hotcoin
LINK-ETH$17.67
0.0065947 Eth
$62,890.00
3,559.400 LINK
0.0140%
91
Kanga
LINK-PLN$17.79
0.0066378 Eth
$61,476.00
0.000 LINK
0.0000%
92
KuCoin
LINK-BTC$17.67
0.0065949 Eth
$55,203.00
3,124.215 LINK
0.0123%
93
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.67
0.0065886 Eth
$39,246.00
2,158.042 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0085%
94
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.80
0.0066450 Eth
$36,028.00
37,279.436 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1469%
95
Bitexen
LINK-TRY$17.66
0.0065892 Eth
$34,187.00
1,935.757 LINK
0.0076%
96
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.70
0.0066072 Eth
$29,444.00
1,651.170 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0065%
97
Dex-Trade
LINK-ETH$17.70
0.0066025 Eth
$22,841.00
1,290.210 LINK
0.0051%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.78
0.0066252 Eth
$17,276.33
940.894 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0037%
99
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$17.71
0.0066034 Eth
$16,794.40
24.274 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
100
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.94
0.0066902 Eth
$16,694.25
934.381 0X5947BB275C521040051D82396192181B413227A3
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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