ETH Price: $3,310.51 (-4.74%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,114 ( 0.027%)

Market

Price

$23.94 @ 0.007232 ETH (-4.61%)

Onchain Market Cap

$23,940,000,000.00

Circulating Supply Market Cap

$15,121,568,769.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
450.020702917424221415 LINK

Value
$10,773.50 ( ~3.2543 Eth) [0.0000%]
0x4f9fB298567D043a215E94cE2819050b2868eC60
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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 21663.64% |ETH 0.0003846 1780.4%

Market

Volume (24H):$1,174,480,547.00
Market Capitalization:$15,121,568,769.00
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$24.12
0.0072943 Eth
$173,163,936.00
7,154,285.830 LINK
22.3394%
2
Coinbase Exchange
LINK-USD$24.15
0.0073065 Eth
$85,607,948.00
3,544,842.560 LINK
11.0688%
3
Bybit
LINK-USDT$24.14
0.0072994 Eth
$46,070,968.00
1,905,638.772 LINK
5.9504%
4
P2B
LINK-USDT$24.14
0.0073006 Eth
$34,788,295.00
1,440,822.540 LINK
4.4990%
5
Slex
LINK-USDT$24.13
0.0072966 Eth
$24,564,969.00
1,016,580.540 LINK
3.1743%
6
OKX
LINK-USDT$24.11
0.0072900 Eth
$21,864,030.00
902,089.033 LINK
2.8168%
7
DigiFinex
LINK-USDT$24.13
0.0072950 Eth
$21,593,199.00
894,978.650 LINK
2.7946%
8
Gate.io
LINK-USDT$24.14
0.0072988 Eth
$17,929,333.00
741,626.440 LINK
2.3157%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.89
0.0072213 Eth
$17,916,801.00
749,673.946 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.3409%
10
HTX
LINK-USDT$24.14
0.0073004 Eth
$17,637,468.00
729,970.182 LINK
2.2793%
11
XT.COM
LINK-USDT$23.90
0.0072743 Eth
$17,122,218.00
707,073.950 LINK
2.2079%
12
Azbit
LINK-USDT$24.08
0.0072798 Eth
$17,083,669.00
705,725.711 LINK
2.2036%
13
Binance
LINK-FDUSD$23.97
0.0072781 Eth
$15,921,216.00
659,315.980 LINK
2.0587%
14
MEXC
LINK-USDT$24.14
0.0072996 Eth
$14,919,605.00
618,171.270 LINK
1.9303%
15
Coinstore
LINK-USDT$24.11
0.0072867 Eth
$14,841,422.00
613,538.780 LINK
1.9158%
16
Bitunix
LINK-USDT$24.08
0.0072780 Eth
$12,903,628.00
535,848.220 LINK
1.6732%
17
CoinW
LINK-USDT$24.12
0.0072962 Eth
$11,449,066.00
474,671.630 LINK
1.4822%
18
Kraken
LINK-USD$24.14
0.0072977 Eth
$10,362,816.00
429,354.210 LINK
1.3407%
19
BYDFi
LINK-USDT$23.99
0.0072860 Eth
$9,498,111.00
395,851.490 LINK
1.2361%
20
KuCoin
LINK-USDT$24.14
0.0073004 Eth
$8,825,737.00
365,546.545 LINK
1.1414%
21
BTSE
LINK-USDT$23.97
0.0072811 Eth
$8,577,508.00
357,776.249 LINK
1.1172%
22
LATOKEN
LINK-USDT$24.09
0.0072824 Eth
$8,573,631.00
355,845.459 LINK
1.1111%
23
LBank
LINK-USDT$24.09
0.0072794 Eth
$8,492,852.00
352,507.440 LINK
1.1007%
24
Binance
LINK-USDC$24.12
0.0072930 Eth
$7,988,910.00
331,390.190 LINK
1.0348%
25
QMall
LINK-USDT$24.08
0.0072790 Eth
$7,027,149.00
290,362.202 LINK
0.9067%
26
Hotcoin
LINK-USDT$24.09
0.0072828 Eth
$6,420,101.00
266,470.820 LINK
0.8321%
27
Coinbase Exchange
LINK-EUR$24.07
0.0072767 Eth
$6,015,387.00
249,882.350 LINK
0.7803%
28
Coinbase Exchange
LINK-USDT$24.12
0.0072943 Eth
$5,824,884.00
241,448.378 LINK
0.7539%
29
Dex-Trade
LINK-USDT$24.08
0.0072776 Eth
$5,483,371.00
227,733.570 LINK
0.7111%
30
FMCPAY
LINK-USDT$24.07
0.0072758 Eth
$4,387,871.00
181,238.582 LINK
0.5659%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.08
0.0072802 Eth
$4,132,600.00
171,351.265 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5350%
32
Bitvavo
LINK-EUR$24.01
0.0072632 Eth
$4,086,142.00
170,168.818 LINK
0.5314%
33
CoinEx
LINK-USDT$24.03
0.0072592 Eth
$3,796,714.00
157,714.462 LINK
0.4925%
34
PointPay
LINK-USDT$24.14
0.0073006 Eth
$2,718,096.00
112,305.938 LINK
0.3507%
35
Biconomy.com
LINK-USDT$24.14
0.0073000 Eth
$2,701,518.00
111,594.380 LINK
0.3485%
36
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.07
0.0072759 Eth
$2,056,067.00
84,859.382 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2650%
37
Phemex
LINK-USDT$23.93
0.0072772 Eth
$1,946,482.00
81,357.030 LINK
0.2540%
38
Coinbase Exchange
LINK-GBP$24.09
0.0072830 Eth
$1,911,397.00
79,332.070 LINK
0.2477%
39
FMCPAY
LINK-ETH$24.07
0.0072766 Eth
$1,851,992.00
76,803.840 LINK
0.2398%
40
ProBit Global
LINK-USDT$24.12
0.0072988 Eth
$1,800,980.00
74,653.677 LINK
0.2331%
41
FMCPAY
LINK-BTC$24.09
0.0072812 Eth
$1,786,112.00
73,302.000 LINK
0.2289%
42
Kraken
LINK-EUR$24.10
0.0072880 Eth
$1,656,490.00
68,722.780 LINK
0.2146%
43
EXMO
LINK-USDT$24.16
0.0073046 Eth
$1,630,789.00
67,505.022 LINK
0.2108%
44
BitStorage
LINK-USDT$24.10
0.0072855 Eth
$1,357,355.00
56,332.530 LINK
0.1759%
45
Bitbank
LINK-JPY$24.20
0.0073179 Eth
$1,355,260.00
56,012.498 LINK
0.1749%
46
Kraken
LINK-USDT$24.11
0.0072913 Eth
$1,234,568.00
51,195.432 LINK
0.1599%
47
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$24.08
0.0072802 Eth
$1,187,886.00
49,152.412 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1535%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.11
0.0072865 Eth
$1,176,533.00
48,720.040 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1521%
49
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.92
0.0072363 Eth
$1,150,353.00
47,575.850 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1486%
50
Binance
LINK-TRY$24.18
0.0073418 Eth
$1,114,910.00
45,839.920 LINK
0.1431%
51
Coinbase Exchange
LINK-ETH$24.09
0.0072814 Eth
$1,103,099.00
45,796.730 LINK
0.1430%
52
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.14
0.0072962 Eth
$1,073,519.00
75,336.003 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2352%
53
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.13
0.0072931 Eth
$1,043,489.00
1,043,616.524 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.2587%
54
EarnBIT
LINK-USDT$24.06
0.0072781 Eth
$1,020,849.00
42,160.138 LINK
0.1316%
55
Binance
LINK-EUR$23.98
0.0072487 Eth
$995,942.00
41,403.980 LINK
0.1293%
56
Gemini
LINK-USD$24.11
0.0072889 Eth
$986,912.00
40,939.195 LINK
0.1278%
57
tanX
LINK-USDC$24.12
0.0072967 Eth
$959,431.00
39,539.170 LINK
0.1235%
58
Nonkyc.io
LINK-USDT$24.05
0.0072686 Eth
$950,726.00
39,506.422 LINK
0.1234%
59
itBit
LINK-USD$24.07
0.0072758 Eth
$907,595.00
37,706.467 LINK
0.1177%
60
Curve (Ethereum)
0XB8B295DF2CD735B15BE5EB419517AA626FC43CD5-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.75
0.0072192 Eth
$903,738.00
38,325.577 0XB8B295DF2CD735B15BE5EB419517AA626FC43CD5
0.1197%
61
Bybit
LINK-USDC$24.15
0.0073013 Eth
$893,523.00
36,962.999 LINK
0.1154%
62
BigONE
LINK-USDT$24.20
0.0073161 Eth
$891,590.00
36,848.830 LINK
0.1151%
63
Trubit
LINK-USDT$24.05
0.0072819 Eth
$853,358.00
35,371.050 LINK
0.1104%
64
LATOKEN
LINK-BTC$24.09
0.0072817 Eth
$807,615.00
33,527.650 LINK
0.1047%
65
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.96
0.0072439 Eth
$681,291.00
687,848.583 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.1478%
66
QMall
LINK-USDC$24.06
0.0072785 Eth
$661,839.00
27,449.938 LINK
0.0857%
67
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.06
0.0072733 Eth
$598,850.00
24,876.755 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0777%
68
GMO Japan
LINK-JPY$24.16
0.0073053 Eth
$597,081.00
24,712.600 LINK
0.0772%
69
ProBit Global
LINK-BTC$24.07
0.0072742 Eth
$582,263.00
24,189.000 LINK
0.0755%
70
Kraken
LINK-ETH$24.11
0.0072890 Eth
$556,260.00
23,074.423 LINK
0.0721%
71
Bitbegin
LINK-USDT$24.10
0.0072905 Eth
$465,786.00
19,281.483 LINK
0.0602%
72
Coinbase Exchange
LINK-BTC$24.09
0.0072821 Eth
$448,137.00
18,605.080 LINK
0.0581%
73
Slex
LINK-BTC$24.05
0.0072882 Eth
$429,278.00
17,569.700 LINK
0.0549%
74
OKX
LINK-USDC$24.14
0.0073005 Eth
$418,200.00
17,320.844 LINK
0.0541%
75
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.13
0.0072945 Eth
$383,063.00
15,863.055 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0495%
76
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.10
0.0072836 Eth
$370,888.00
15,306.352 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0478%
77
Bitkub
LINK-THB$24.19
0.0073188 Eth
$352,757.00
14,582.285 LINK
0.0455%
78
BitDelta
LINK-USDT$24.07
0.0072760 Eth
$334,882.00
13,845.000 LINK
0.0432%
79
bitcastle
LINK-USDT$23.97
0.0072518 Eth
$325,596.00
13,455.790 LINK
0.0420%
80
Bitso
LINK-USD$23.82
0.0072346 Eth
$325,434.00
13,660.317 LINK
0.0427%
81
Slex
LINK-ETH$24.09
0.0072826 Eth
$316,075.00
13,091.940 LINK
0.0409%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.08
0.0072785 Eth
$310,717.00
12,865.995 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0402%
83
PointPay
LINK-BTC$23.99
0.0072615 Eth
$303,633.00
12,441.290 LINK
0.0388%
84
BitMart
LINK-BTC$24.07
0.0072804 Eth
$287,587.00
11,947.180 LINK
0.0373%
85
BitStorage
LINK-ETH$24.13
0.0072950 Eth
$273,544.00
11,337.660 LINK
0.0354%
86
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.00
0.0072554 Eth
$220,389.00
9,059.967 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0283%
87
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.00
0.0072617 Eth
$219,324.00
9,095.190 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0284%
88
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$24.11
0.0072873 Eth
$207,938.00
8,600.165 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0269%
89
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.78
0.0072349 Eth
$207,260.00
8,657.905 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0270%
90
BYDFi
LINK-USDC$24.03
0.0072975 Eth
$192,092.00
7,994.580 LINK
0.0250%
91
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.02
0.0072604 Eth
$186,080.00
7,641.948 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0239%
92
Kraken
LINK-GBP$24.09
0.0072823 Eth
$183,651.00
7,625.077 LINK
0.0238%
93
KuCoin
LINK-USDC$24.15
0.0073010 Eth
$183,159.00
7,585.465 LINK
0.0237%
94
Binance US
LINK-USDT$24.07
0.0072746 Eth
$181,890.00
7,557.319 LINK
0.0236%
95
Binance
LINK-BNB$24.12
0.0072935 Eth
$180,435.00
7,391.230 LINK
0.0231%
96
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.08
0.0072802 Eth
$179,726.00
180,306.899 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5630%
97
Mercado Bitcoin
LINK-BRL$24.10
0.0072859 Eth
$135,959.00
5,642.408 LINK
0.0176%
98
KuCoin
LINK-BTC$24.15
0.0073028 Eth
$132,088.00
5,469.100 LINK
0.0171%
99
BitMart
LINK-ETH$24.06
0.0072759 Eth
$107,582.00
4,472.040 LINK
0.0140%
100
Coins.ph
LINK-PHP$24.16
0.0073035 Eth
$78,025.00
3,219.246 LINK
0.0101%

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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