ETH Price: $3,455.05 (-5.98%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,238 ( -0.073%)

Market

Price

$21.93 @ 0.006347 ETH (-9.36%)

Onchain Market Cap

$21,930,000,000.00

Circulating Supply Market Cap

$13,826,473,546.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x9295785ce2d004b46ab0986f07ccfa0d4b4144bb
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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 19836.36% |ETH 0.0003846 1550.29%

Market

Volume (24H):$1,140,985,492.00
Market Capitalization:$13,826,473,546.00
Circulating Supply:631,099,972.00 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$21.88
0.0063250 Eth
$154,713,320.00
6,759,697.970 LINK
24.8340%
2
Coinbase Exchange
LINK-USD$21.89
0.0063300 Eth
$40,278,009.00
1,840,102.750 LINK
6.7602%
3
Bitget
LINK-USDT$21.88
0.0063264 Eth
$35,774,284.00
1,562,502.296 LINK
5.7404%
4
Bybit
LINK-USDT$21.88
0.0063267 Eth
$29,746,725.00
1,298,811.075 LINK
4.7716%
5
MEXC
LINK-USDT$21.88
0.0063238 Eth
$25,668,619.00
1,173,371.830 LINK
4.3108%
6
Slex
LINK-USDT$21.94
0.0063471 Eth
$23,236,920.00
991,966.880 LINK
3.6443%
7
P2B
LINK-USDT$21.93
0.0063354 Eth
$21,940,918.00
1,000,361.640 LINK
3.6752%
8
OKX
LINK-USDT$21.88
0.0063264 Eth
$20,229,435.00
878,863.401 LINK
3.2288%
9
DigiFinex
LINK-USDT$21.86
0.0063231 Eth
$18,569,189.00
849,287.390 LINK
3.1201%
10
CoinW
LINK-USDT$21.93
0.0063301 Eth
$15,985,496.00
728,848.250 LINK
2.6777%
11
FameEX
LINK-USDT$21.95
0.0063465 Eth
$15,401,840.00
672,943.972 LINK
2.4723%
12
Azbit
LINK-USDT$21.89
0.0063293 Eth
$15,391,432.00
672,184.365 LINK
2.4695%
13
XT.COM
LINK-USDT$21.94
0.0063383 Eth
$15,356,849.00
670,018.400 LINK
2.4615%
14
Coinstore
LINK-USDT$21.93
0.0063353 Eth
$12,393,933.00
538,421.570 LINK
1.9781%
15
Bitunix
LINK-USDT$21.89
0.0063300 Eth
$11,139,964.00
508,816.230 LINK
1.8693%
16
HTX
LINK-USDT$21.85
0.0063238 Eth
$10,735,414.00
459,390.785 LINK
1.6877%
17
BYDFi
LINK-USDT$21.88
0.0063264 Eth
$8,671,462.00
396,400.020 LINK
1.4563%
18
Binance
LINK-FDUSD$21.88
0.0063289 Eth
$8,630,261.00
376,276.000 LINK
1.3824%
19
LATOKEN
LINK-USDT$21.87
0.0063242 Eth
$7,573,627.00
346,225.879 LINK
1.2720%
20
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.87
0.0063291 Eth
$7,521,051.00
342,235.822 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.2573%
21
LBank
LINK-USDT$21.90
0.0063318 Eth
$7,248,767.00
331,068.000 LINK
1.2163%
22
Binance
LINK-USDC$21.87
0.0063244 Eth
$6,773,517.00
296,550.770 LINK
1.0895%
23
Hotcoin
LINK-USDT$21.95
0.0063453 Eth
$6,428,890.00
292,949.490 LINK
1.0762%
24
QMall
LINK-USDT$21.89
0.0063292 Eth
$6,185,859.00
270,593.344 LINK
0.9941%
25
Kraken
LINK-USD$21.90
0.0063387 Eth
$5,381,434.00
245,727.563 LINK
0.9028%
26
KuCoin
LINK-USDT$21.87
0.0063242 Eth
$4,631,964.00
211,813.422 LINK
0.7782%
27
Dex-Trade
LINK-USDT$21.87
0.0063233 Eth
$3,866,717.00
176,790.610 LINK
0.6495%
28
BTSE
LINK-USDT$21.96
0.0063550 Eth
$3,257,345.00
148,326.661 LINK
0.5449%
29
Coinbase Exchange
LINK-BTC$21.90
0.0063314 Eth
$3,237,378.00
147,809.970 LINK
0.5430%
30
FMCPAY
LINK-USDT$21.90
0.0063285 Eth
$2,967,463.00
127,850.494 LINK
0.4697%
31
CoinEx
LINK-USDT$21.87
0.0063231 Eth
$2,826,579.00
122,537.984 LINK
0.4502%
32
Biconomy.com
LINK-USDT$21.90
0.0063343 Eth
$2,776,742.00
119,748.840 LINK
0.4399%
33
Bitvavo
LINK-EUR$21.91
0.0063352 Eth
$2,681,057.00
122,388.592 LINK
0.4496%
34
PointPay
LINK-USDT$21.89
0.0063274 Eth
$2,431,873.00
106,515.730 LINK
0.3913%
35
Coinbase Exchange
LINK-EUR$21.93
0.0063385 Eth
$2,204,417.00
100,539.540 LINK
0.3694%
36
EXMO
LINK-USDT$21.88
0.0063269 Eth
$1,832,376.00
83,753.539 LINK
0.3077%
37
Dcoin
LINK-USDT$21.91
0.0063375 Eth
$1,759,883.00
80,305.000 LINK
0.2950%
38
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.98
0.0063575 Eth
$1,724,273.00
77,973.237 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2865%
39
ProBit Global
LINK-USDT$21.90
0.0063321 Eth
$1,635,463.00
74,670.817 LINK
0.2743%
40
Phemex
LINK-USDT$21.91
0.0063337 Eth
$1,500,061.00
68,453.450 LINK
0.2515%
41
itBit
LINK-USD$21.98
0.0063521 Eth
$1,419,096.00
64,563.050 LINK
0.2372%
42
FMCPAY
LINK-BTC$21.91
0.0063332 Eth
$1,340,591.00
59,530.100 LINK
0.2187%
43
tanX
LINK-USDC$21.90
0.0063336 Eth
$1,289,771.00
55,152.130 LINK
0.2026%
44
FMCPAY
LINK-ETH$21.90
0.0063305 Eth
$1,281,751.00
57,736.480 LINK
0.2121%
45
OKX
LINK-USDC$21.86
0.0063232 Eth
$1,182,294.00
50,777.881 LINK
0.1865%
46
Kraken
LINK-EUR$21.91
0.0063421 Eth
$1,173,490.00
53,555.343 LINK
0.1968%
47
Binance
LINK-EUR$21.89
0.0063319 Eth
$1,168,269.00
51,419.120 LINK
0.1889%
48
Coinbase Exchange
LINK-GBP$21.93
0.0063405 Eth
$1,074,669.00
48,998.290 LINK
0.1800%
49
BitStorage
LINK-USDT$21.95
0.0063447 Eth
$1,053,744.00
48,005.090 LINK
0.1764%
50
Coinbase Exchange
LINK-USDT$21.90
0.0063322 Eth
$1,052,250.00
48,055.928 LINK
0.1765%
51
BigONE
LINK-USDT$21.83
0.0063055 Eth
$998,931.00
45,760.240 LINK
0.1681%
52
Bybit
LINK-USDC$21.88
0.0063270 Eth
$982,064.00
42,872.330 LINK
0.1575%
53
EarnBIT
LINK-USDT$21.94
0.0063405 Eth
$882,532.00
38,357.358 LINK
0.1409%
54
Gemini
LINK-USD$21.92
0.0063390 Eth
$850,291.00
38,792.208 LINK
0.1425%
55
Bitbank
LINK-JPY$22.01
0.0063643 Eth
$839,103.00
38,128.068 LINK
0.1401%
56
Koinpark
LINK-USDT$21.92
0.0063366 Eth
$759,884.00
34,660.563 LINK
0.1273%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.98
0.0063554 Eth
$742,449.00
33,937.650 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1247%
58
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$22.01
0.0063612 Eth
$629,844.00
27,777.167 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1020%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.92
0.0063381 Eth
$588,389.00
26,545.523 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0975%
60
Binance
LINK-TRY$21.95
0.0063492 Eth
$537,059.00
23,365.930 LINK
0.0858%
61
HashKey Exchange
LINK-USD$21.91
0.0063307 Eth
$511,291.00
22,204.572 LINK
0.0816%
62
ProBit Global
LINK-BTC$21.89
0.0063313 Eth
$436,450.00
19,935.233 LINK
0.0732%
63
Coinbase Exchange
LINK-ETH$21.90
0.0063380 Eth
$435,103.00
19,869.930 LINK
0.0730%
64
Bitbegin
LINK-USDT$21.88
0.0063334 Eth
$431,882.00
18,464.184 LINK
0.0678%
65
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.90
0.0063323 Eth
$416,564.00
18,827.605 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0692%
66
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$21.89
0.0063300 Eth
$387,924.00
16,894.943 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0621%
67
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.89
0.0063311 Eth
$382,674.00
407,239.786 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.4961%
68
GMO Japan
LINK-JPY$22.03
0.0063697 Eth
$380,078.00
17,255.900 LINK
0.0634%
69
Bitkub
LINK-THB$21.94
0.0063484 Eth
$331,991.00
15,133.352 LINK
0.0556%
70
Coins.ph
LINK-PHP$21.98
0.0063556 Eth
$317,621.00
14,089.750 LINK
0.0518%
71
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.89
0.0063303 Eth
$268,430.00
282,876.344 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.0392%
72
Hotcoin
LINK-BTC$21.91
0.0063342 Eth
$241,495.00
11,021.560 LINK
0.0405%
73
Bitci TR
LINK-TRY$22.09
0.0063883 Eth
$239,535.00
10,193.257 LINK
0.0374%
74
Binance
LINK-BRL$22.05
0.0063774 Eth
$234,223.00
10,184.370 LINK
0.0374%
75
BitDelta
LINK-USDT$21.93
0.0063333 Eth
$226,006.00
9,711.000 LINK
0.0357%
76
LATOKEN
LINK-BTC$21.89
0.0063313 Eth
$193,375.00
8,832.595 LINK
0.0324%
77
Foxbit
LINK-BRL$22.05
0.0063665 Eth
$185,475.00
8,049.108 LINK
0.0296%
78
Binance US
LINK-USDT$21.96
0.0063499 Eth
$175,454.00
7,988.457 LINK
0.0293%
79
BitStorage
LINK-ETH$21.99
0.0063507 Eth
$161,686.00
7,353.970 LINK
0.0270%
80
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$21.91
0.0063372 Eth
$155,754.00
7,043.219 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0259%
81
PointPay
LINK-BTC$21.90
0.0063339 Eth
$148,682.00
6,674.110 LINK
0.0245%
82
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.93
0.0063346 Eth
$148,010.00
6,424.000 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0236%
83
BitMart
LINK-ETH$21.90
0.0063321 Eth
$140,662.00
6,424.080 LINK
0.0236%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.92
0.0063392 Eth
$128,984.00
5,813.558 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0214%
85
KuCoin
LINK-USDC$21.89
0.0063291 Eth
$106,897.00
4,884.456 LINK
0.0179%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$21.92
0.0063381 Eth
$103,336.00
4,487.643 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0165%
87
Mercado Bitcoin
LINK-BRL$22.03
0.0063711 Eth
$95,174.00
4,320.009 LINK
0.0159%
88
Hotcoin
LINK-ETH$21.90
0.0063332 Eth
$86,820.00
3,964.380 LINK
0.0146%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.02
0.0063681 Eth
$80,642.00
3,685.840 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0135%
90
Nonkyc.io
LINK-BTC$22.03
0.0063693 Eth
$77,482.00
3,460.721 LINK
0.0127%
91
Bitso
LINK-USD$21.91
0.0063429 Eth
$73,201.00
3,340.281 LINK
0.0123%
92
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.91
0.0063359 Eth
$68,160.00
3,025.255 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0111%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$22.01
0.0063645 Eth
$63,302.00
2,825.326 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0104%
94
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.04
0.0063785 Eth
$63,181.00
2,776.095 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0102%
95
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.98
0.0063575 Eth
$55,326.00
58,137.361 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2136%
96
Bitexen
LINK-TRY$21.70
0.0062759 Eth
$47,064.00
2,168.688 LINK
0.0080%
97
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$21.99
0.0063601 Eth
$29,524.00
39.495 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
98
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.98
0.0063562 Eth
$24,587.00
1,134.167 0X5947BB275C521040051D82396192181B413227A3
0.0042%
99
Dex-Trade
LINK-ETH$21.96
0.0063411 Eth
$23,030.00
1,048.580 LINK
0.0039%
100
HTX
LINK-BTC$21.85
0.0063245 Eth
$13,952.02
622.530 LINK
0.0023%

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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