ETH Price: $3,300.42 (+1.20%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

732,496 ( 0.031%)

Market

Price

$24.94 @ 0.007557 ETH (+2.00%)

Onchain Market Cap

$24,940,000,000.00

Circulating Supply Market Cap

$15,912,888,558.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.049811256571708764 LINK

Value
$1.24 ( ~0.000375709342202689 Eth) [0.0000%]
0x2F69d5d362549d3B8F351BDAbf8d64D65Ef39EE0
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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 22572.73% |ETH 0.0003846 1864.9%

Market

Volume (24H):$1,014,382,115.00
Market Capitalization:$15,912,888,558.00
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$24.98
0.0075490 Eth
$139,667,433.00
5,529,126.060 LINK
22.8237%
2
Coinbase Exchange
LINK-USD$25.03
0.0075619 Eth
$59,430,386.00
2,374,555.930 LINK
9.8019%
3
Bybit
LINK-USDT$24.98
0.0075477 Eth
$47,807,805.00
1,895,825.657 LINK
7.8258%
4
P2B
LINK-USDT$24.99
0.0075444 Eth
$28,720,744.00
1,149,174.200 LINK
4.7437%
5
OKX
LINK-USDT$24.97
0.0075445 Eth
$22,811,961.00
900,883.214 LINK
3.7188%
6
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.99
0.0075460 Eth
$18,389,349.00
730,262.772 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.0145%
7
Gate.io
LINK-USDT$25.02
0.0075610 Eth
$18,207,368.00
720,920.160 LINK
2.9759%
8
DigiFinex
LINK-USDT$25.00
0.0075555 Eth
$17,955,921.00
718,136.760 LINK
2.9644%
9
MEXC
LINK-USDT$25.01
0.0075502 Eth
$14,279,748.00
570,999.030 LINK
2.3570%
10
XT.COM
LINK-USDT$24.83
0.0074909 Eth
$13,949,197.00
552,535.210 LINK
2.2808%
11
Azbit
LINK-USDT$25.01
0.0075481 Eth
$13,757,195.00
544,886.006 LINK
2.2492%
12
HTX
LINK-USDT$25.02
0.0075593 Eth
$12,217,917.00
488,246.105 LINK
2.0154%
13
Coinstore
LINK-USDT$25.00
0.0075457 Eth
$11,929,046.00
473,302.220 LINK
1.9537%
14
Bitunix
LINK-USDT$24.96
0.0075422 Eth
$10,836,847.00
434,024.190 LINK
1.7916%
15
Binance
LINK-USDC$24.97
0.0075453 Eth
$10,384,161.00
411,802.300 LINK
1.6999%
16
CoinW
LINK-USDT$24.93
0.0075153 Eth
$8,859,730.00
355,345.870 LINK
1.4668%
17
Binance
LINK-FDUSD$24.90
0.0075216 Eth
$8,645,026.00
344,576.880 LINK
1.4224%
18
KuCoin
LINK-USDT$25.03
0.0075613 Eth
$8,511,216.00
340,098.925 LINK
1.4039%
19
BYDFi
LINK-USDT$24.98
0.0075517 Eth
$7,696,277.00
308,143.440 LINK
1.2720%
20
LATOKEN
LINK-USDT$25.03
0.0075492 Eth
$6,875,881.00
274,693.729 LINK
1.1339%
21
LBank
LINK-USDT$25.03
0.0075671 Eth
$6,793,008.00
271,395.540 LINK
1.1203%
22
Kraken
LINK-USD$25.01
0.0075565 Eth
$6,520,986.00
260,735.138 LINK
1.0763%
23
BTSE
LINK-USDT$24.82
0.0074927 Eth
$6,084,263.00
245,100.050 LINK
1.0118%
24
Hotcoin
LINK-USDT$24.98
0.0075383 Eth
$5,845,598.00
233,990.696 LINK
0.9659%
25
Bitvavo
LINK-EUR$25.01
0.0075552 Eth
$5,844,469.00
233,641.003 LINK
0.9644%
26
QMall
LINK-USDT$24.88
0.0075145 Eth
$5,753,634.00
227,811.361 LINK
0.9404%
27
Coinbase Exchange
LINK-EUR$25.00
0.0075596 Eth
$4,330,392.00
173,199.690 LINK
0.7150%
28
Dex-Trade
LINK-USDT$24.98
0.0075517 Eth
$4,297,775.00
172,074.270 LINK
0.7103%
29
FMCPAY
LINK-USDT$25.01
0.0075577 Eth
$4,243,588.00
169,011.098 LINK
0.6977%
30
CoinEx
LINK-USDT$25.03
0.0075634 Eth
$3,194,249.00
126,088.596 LINK
0.5205%
31
Bitstamp
LINK-USD$25.03
0.0075635 Eth
$2,929,917.00
117,056.225 LINK
0.4832%
32
Biconomy.com
LINK-USDT$25.02
0.0075610 Eth
$2,744,239.00
109,071.670 LINK
0.4502%
33
PointPay
LINK-USDT$25.04
0.0075668 Eth
$2,264,566.00
89,536.008 LINK
0.3696%
34
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.82
0.0074940 Eth
$2,236,070.00
89,434.138 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3692%
35
FMCPAY
LINK-ETH$24.95
0.0075470 Eth
$1,793,871.00
71,559.840 LINK
0.2954%
36
Coinbase Exchange
LINK-GBP$24.98
0.0075515 Eth
$1,774,399.00
71,045.280 LINK
0.2933%
37
FMCPAY
LINK-BTC$24.96
0.0075242 Eth
$1,658,199.00
67,577.100 LINK
0.2790%
38
Bitstamp
LINK-EUR$25.07
0.0075770 Eth
$1,634,709.00
65,193.215 LINK
0.2691%
39
Phemex
LINK-USDT$25.00
0.0075612 Eth
$1,586,416.00
63,460.760 LINK
0.2620%
40
EXMO
LINK-USDT$25.05
0.0075735 Eth
$1,430,207.00
57,091.302 LINK
0.2357%
41
Binance
LINK-TRY$25.14
0.0075964 Eth
$1,385,351.00
54,675.280 LINK
0.2257%
42
tanX
LINK-USDC$24.98
0.0075411 Eth
$1,230,552.00
49,063.040 LINK
0.2025%
43
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.72
0.0074686 Eth
$1,201,694.00
48,179.181 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1989%
44
Bybit
LINK-USDC$25.02
0.0075619 Eth
$1,169,182.00
46,091.575 LINK
0.1903%
45
BitStorage
LINK-USDT$24.91
0.0075170 Eth
$1,096,233.00
44,002.020 LINK
0.1816%
46
EarnBIT
LINK-USDT$24.97
0.0075364 Eth
$1,071,871.00
42,377.288 LINK
0.1749%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.96
0.0075414 Eth
$996,356.00
39,556.465 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1633%
48
Bitbank
LINK-JPY$25.04
0.0075660 Eth
$978,217.00
39,063.986 LINK
0.1613%
49
Binance
LINK-EUR$25.03
0.0075645 Eth
$938,300.00
37,230.470 LINK
0.1537%
50
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.93
0.0075265 Eth
$909,771.00
75,482.778 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3116%
51
Trubit
LINK-USDT$24.96
0.0075346 Eth
$877,184.00
35,097.190 LINK
0.1449%
52
Coinbase Exchange
LINK-USDT$25.00
0.0075472 Eth
$874,498.00
34,982.198 LINK
0.1444%
53
BigONE
LINK-USDT$24.99
0.0075495 Eth
$872,287.00
34,909.760 LINK
0.1441%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$24.95
0.0075429 Eth
$798,110.00
31,780.386 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1312%
55
QMall
LINK-USDC$24.99
0.0075513 Eth
$761,544.00
30,103.435 LINK
0.1243%
56
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.02
0.0075596 Eth
$749,996.00
29,675.025 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1225%
57
Gemini
LINK-USD$25.00
0.0075547 Eth
$737,989.00
29,518.361 LINK
0.1218%
58
OKX
LINK-USDC$25.01
0.0075572 Eth
$731,269.00
28,912.244 LINK
0.1193%
59
WhiteBIT
LINK-TRY$25.03
0.0075673 Eth
$725,320.00
28,980.700 LINK
0.1196%
60
itBit
LINK-USD$24.95
0.0075286 Eth
$725,224.00
29,067.094 LINK
0.1200%
61
HashKey Exchange
LINK-USD$24.95
0.0075423 Eth
$689,537.00
27,491.201 LINK
0.1135%
62
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$24.82
0.0074940 Eth
$672,054.00
26,694.890 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1102%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$25.01
0.0075566 Eth
$621,437.00
24,801.204 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1024%
64
LATOKEN
LINK-BTC$24.99
0.0075557 Eth
$617,934.00
24,724.870 LINK
0.1021%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.00
0.0075518 Eth
$600,646.00
24,330.453 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1004%
66
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.96
0.0075414 Eth
$584,761.00
590,838.631 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.4389%
67
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.97
0.0075442 Eth
$483,060.00
19,176.344 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0792%
68
BitDelta
LINK-USDT$24.95
0.0075461 Eth
$465,669.00
18,472.000 LINK
0.0763%
69
Coinbase Exchange
LINK-BTC$25.02
0.0075599 Eth
$416,033.00
16,627.200 LINK
0.0686%
70
GMO Japan
LINK-JPY$24.97
0.0075315 Eth
$411,800.00
16,492.200 LINK
0.0681%
71
WhiteBIT
LINK-BTC$24.96
0.0075323 Eth
$364,337.00
14,595.660 LINK
0.0602%
72
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.97
0.0075332 Eth
$338,268.00
13,421.458 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0554%
73
Kraken
LINK-GBP$24.84
0.0075053 Eth
$302,080.00
12,160.810 LINK
0.0502%
74
BitMart
LINK-BTC$24.98
0.0075489 Eth
$274,830.00
11,001.200 LINK
0.0454%
75
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.84
0.0075035 Eth
$263,038.00
10,304.862 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0425%
76
Slex
LINK-ETH$25.00
0.0075534 Eth
$256,400.00
10,236.700 LINK
0.0423%
77
Bitci TR
LINK-TRY$25.23
0.0076227 Eth
$254,022.00
10,133.300 LINK
0.0418%
78
PointPay
LINK-BTC$24.91
0.0075111 Eth
$245,406.00
9,897.374 LINK
0.0409%
79
WhiteBIT
LINK-EUR$24.92
0.0075258 Eth
$221,588.00
8,892.910 LINK
0.0367%
80
BitStorage
LINK-ETH$25.01
0.0075529 Eth
$208,743.00
8,347.280 LINK
0.0345%
81
Bitkub
LINK-THB$24.71
0.0074700 Eth
$208,048.00
8,421.016 LINK
0.0348%
82
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.93
0.0075279 Eth
$206,257.00
8,252.120 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0341%
83
Hotcoin
LINK-BTC$24.98
0.0075412 Eth
$205,962.00
8,245.610 LINK
0.0340%
84
Binance US
LINK-USDT$24.97
0.0075490 Eth
$196,322.00
7,862.324 LINK
0.0325%
85
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$24.99
0.0075518 Eth
$171,124.00
6,809.873 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0281%
86
Binance
LINK-BRL$25.12
0.0075825 Eth
$170,986.00
6,766.830 LINK
0.0279%
87
BYDFi
LINK-USDC$25.04
0.0075670 Eth
$170,779.00
6,819.620 LINK
0.0282%
88
Bitso
LINK-USD$24.96
0.0075321 Eth
$139,479.00
5,587.794 LINK
0.0231%
89
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.82
0.0074940 Eth
$138,077.00
139,248.332 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5748%
90
Coinbase Exchange
LINK-ETH$25.00
0.0075469 Eth
$136,832.00
5,473.830 LINK
0.0226%
91
Mercado Bitcoin
LINK-BRL$25.11
0.0075888 Eth
$132,239.00
5,265.392 LINK
0.0217%
92
CoinTR
LINK-TRY$25.08
0.0075794 Eth
$130,387.00
5,203.710 LINK
0.0215%
93
KuCoin
LINK-USDC$24.97
0.0075434 Eth
$118,430.00
4,743.520 LINK
0.0196%
94
Uniswap V3 (Ethereum)
0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.90
0.0075176 Eth
$115,449.00
162,693.978 0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23
0.6716%
95
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.84
0.0074986 Eth
$114,362.00
4,649.892 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0192%
96
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.95
0.0075316 Eth
$108,615.00
109,289.764 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4511%
97
KuCoin
LINK-BTC$25.03
0.0075636 Eth
$100,755.00
4,024.831 LINK
0.0166%
98
BitMart
LINK-ETH$24.97
0.0075460 Eth
$80,979.00
3,242.760 LINK
0.0134%
99
Hotcoin
LINK-ETH$25.01
0.0075508 Eth
$65,560.00
2,621.320 LINK
0.0108%
100
Dex-Trade
LINK-ETH$24.99
0.0075430 Eth
$28,085.00
1,123.780 LINK
0.0046%

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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