ETH Price: $3,860.81 (-1.65%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,149 ( -0.013%)

Market

Price

$28.70 @ 0.007434 ETH (-3.83%)

Onchain Market Cap

$28,700,000,000.00

Circulating Supply Market Cap

$17,998,214,525.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
9.65699497 LINK

Value
$277.16 ( ~0.0717879570071022 Eth) [0.0000%]
0x5802326dd47c3ecfb76d33444a350448a868967a
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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 25990.91% |ETH 0.0003846 1832.92%

Market

Volume (24H):$2,977,432,236.00
Market Capitalization:$17,998,214,525.00
Circulating Supply:626,849,971.00 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$28.77
0.0074605 Eth
$292,842,620.00
9,900,803.270 LINK
23.2456%
2
Coinbase Exchange
LINK-USD$28.84
0.0074760 Eth
$115,371,898.00
4,001,106.240 LINK
9.3940%
3
Bitget
LINK-USDT$28.82
0.0074735 Eth
$89,833,350.00
3,041,873.356 LINK
7.1419%
4
Bybit
LINK-USDT$28.75
0.0074566 Eth
$76,387,448.00
2,587,138.399 LINK
6.0742%
5
Gate.io
LINK-USDT$28.80
0.0074688 Eth
$62,413,520.00
2,107,066.000 LINK
4.9471%
6
OKX
LINK-USDT$28.84
0.0074733 Eth
$59,830,211.00
2,023,428.173 LINK
4.7507%
7
P2B
LINK-USDT$28.83
0.0074753 Eth
$59,728,714.00
2,071,720.650 LINK
4.8641%
8
MEXC
LINK-USDT$28.77
0.0074586 Eth
$55,918,417.00
1,943,578.610 LINK
4.5632%
9
DigiFinex
LINK-USDT$28.80
0.0074692 Eth
$38,483,622.00
1,336,113.560 LINK
3.1370%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$28.69
0.0074375 Eth
$31,664,466.00
1,076,375.695 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.5272%
11
Bitunix
LINK-USDT$28.72
0.0074470 Eth
$28,811,089.00
1,003,194.330 LINK
2.3553%
12
Bithumb
LINK-KRW$28.90
0.0074943 Eth
$26,755,013.00
925,656.386 LINK
2.1733%
13
CoinW
LINK-USDT$28.78
0.0074628 Eth
$22,358,579.00
776,774.700 LINK
1.8237%
14
Binance
LINK-FDUSD$28.69
0.0074444 Eth
$20,519,028.00
693,965.910 LINK
1.6293%
15
Biconomy.com
LINK-USDT$28.72
0.0074453 Eth
$17,449,828.00
590,085.630 LINK
1.3854%
16
HTX
LINK-USDT$28.79
0.0074649 Eth
$17,370,047.00
589,254.234 LINK
1.3835%
17
BTSE
LINK-USDT$28.73
0.0074483 Eth
$17,163,805.00
597,457.231 LINK
1.4027%
18
BYDFi
LINK-USDT$28.71
0.0074618 Eth
$16,087,912.00
560,297.570 LINK
1.3155%
19
Kraken
LINK-USD$28.81
0.0074661 Eth
$14,681,243.00
509,531.320 LINK
1.1963%
20
LATOKEN
LINK-USDT$28.76
0.0074757 Eth
$13,813,570.00
480,274.985 LINK
1.1276%
21
KuCoin
LINK-USDT$28.80
0.0074692 Eth
$12,588,112.00
437,045.375 LINK
1.0261%
22
Dex-Trade
LINK-USDT$28.82
0.0074703 Eth
$9,461,633.00
328,352.813 LINK
0.7709%
23
Coinbase Exchange
LINK-EUR$28.86
0.0074815 Eth
$9,004,384.00
312,007.790 LINK
0.7325%
24
Binance
LINK-USDC$28.66
0.0074357 Eth
$8,216,536.00
277,987.380 LINK
0.6527%
25
CoinEx
LINK-USDT$28.83
0.0074734 Eth
$7,435,546.00
251,697.864 LINK
0.5909%
26
Bitvavo
LINK-EUR$28.83
0.0074733 Eth
$7,028,834.00
243,819.869 LINK
0.5725%
27
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$28.73
0.0074493 Eth
$6,621,619.00
225,950.301 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5305%
28
Binance
LINK-TRY$28.93
0.0074991 Eth
$5,454,663.00
182,435.630 LINK
0.4283%
29
PointPay
LINK-USDT$28.72
0.0074457 Eth
$4,855,161.00
164,137.057 LINK
0.3854%
30
EXMO
LINK-USDT$28.78
0.0074624 Eth
$4,107,067.00
142,702.113 LINK
0.3350%
31
Dcoin
LINK-USDT$28.74
0.0074704 Eth
$4,023,346.00
139,989.000 LINK
0.3287%
32
WhiteBIT
LINK-BTC$28.73
0.0074491 Eth
$4,007,062.00
139,467.240 LINK
0.3274%
33
WhiteBIT
LINK-TRY$29.02
0.0075248 Eth
$3,919,936.00
135,090.870 LINK
0.3172%
34
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$28.69
0.0074374 Eth
$3,694,371.00
125,662.344 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2950%
35
Hotcoin
LINK-USDT$28.70
0.0074569 Eth
$3,596,845.00
125,323.264 LINK
0.2942%
36
Phemex
LINK-USDT$28.72
0.0074653 Eth
$2,911,666.00
101,374.760 LINK
0.2380%
37
Bitbank
LINK-JPY$28.85
0.0074794 Eth
$2,879,050.00
99,798.178 LINK
0.2343%
38
EarnBIT
LINK-USDT$28.72
0.0074451 Eth
$2,859,028.00
96,575.049 LINK
0.2267%
39
Bitstamp
LINK-EUR$28.68
0.0074318 Eth
$2,748,546.00
95,831.763 LINK
0.2250%
40
Tapbit
LINK-USDT$28.76
0.0074570 Eth
$2,705,677.00
91,494.330 LINK
0.2148%
41
Coinbase Exchange
LINK-USDT$28.77
0.0074574 Eth
$2,579,442.00
89,671.536 LINK
0.2105%
42
BitStorage
LINK-USDT$28.82
0.0074703 Eth
$2,275,287.00
78,960.660 LINK
0.1854%
43
OKX
LINK-USDC$28.87
0.0074799 Eth
$2,143,621.00
72,418.722 LINK
0.1700%
44
Kraken
LINK-EUR$28.88
0.0074837 Eth
$2,102,681.00
72,804.421 LINK
0.1709%
45
Bybit
LINK-USDC$28.83
0.0074770 Eth
$2,052,089.00
69,495.688 LINK
0.1632%
46
Kraken
LINK-USDT$28.85
0.0074752 Eth
$2,032,195.00
70,443.529 LINK
0.1654%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$28.76
0.0074567 Eth
$1,978,416.00
67,790.594 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1592%
48
tanX
LINK-USDC$28.83
0.0074749 Eth
$1,854,841.00
62,847.160 LINK
0.1476%
49
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$28.72
0.0074475 Eth
$1,830,513.00
62,557.050 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1469%
50
Binance
LINK-EUR$28.74
0.0074539 Eth
$1,755,030.00
59,091.190 LINK
0.1387%
51
Slex
LINK-BTC$28.86
0.0074812 Eth
$1,326,137.00
44,822.700 LINK
0.1052%
52
Gemini
LINK-USD$28.78
0.0074630 Eth
$1,244,777.00
43,253.180 LINK
0.1016%
53
LATOKEN
LINK-BTC$28.70
0.0074410 Eth
$1,151,239.00
40,112.706 LINK
0.0942%
54
Kraken
LINK-XBT$28.71
0.0074382 Eth
$1,134,433.00
39,519.724 LINK
0.0928%
55
GMO Japan
LINK-JPY$28.71
0.0074445 Eth
$1,127,881.00
39,282.900 LINK
0.0922%
56
Bitkub
LINK-THB$28.62
0.0074381 Eth
$1,045,853.00
36,539.447 LINK
0.0858%
57
WhiteBIT
LINK-EUR$28.70
0.0074472 Eth
$988,615.00
34,445.430 LINK
0.0809%
58
Uniswap V3 (Ethereum)
0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9-0X514910771AF9CA656AF840DFF83E8264ECF986CA$28.69
0.0074373 Eth
$975,249.00
2,694.602 0X7FC66500C84A76AD7E9C93437BFC5AC33E2DDAE9
0.0063%
59
PointPay
LINK-BTC$28.73
0.0074488 Eth
$908,335.00
30,707.396 LINK
0.0721%
60
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$28.69
0.0074373 Eth
$887,569.00
54,544.388 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1281%
61
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$28.69
0.0074372 Eth
$815,988.00
27,841.466 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0654%
62
Bancor (V3)
LINK-BNT$28.71
0.0074423 Eth
$803,014.00
27,956.532 LINK
0.0656%
63
Trubit
LINK-USDT$28.69
0.0074551 Eth
$799,941.00
27,190.200 LINK
0.0638%
64
Coinbase Exchange
LINK-GBP$28.72
0.0074450 Eth
$776,138.00
27,025.660 LINK
0.0635%
65
BitMart
LINK-BTC$28.68
0.0074365 Eth
$718,342.00
25,042.460 LINK
0.0588%
66
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$28.72
0.0074456 Eth
$689,648.00
23,478.565 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0551%
67
itBit
LINK-USD$28.78
0.0074878 Eth
$676,844.00
23,517.853 LINK
0.0552%
68
BigONE
LINK-USDT$28.70
0.0074677 Eth
$631,245.00
21,996.800 LINK
0.0516%
69
Coinbase Exchange
LINK-BTC$28.79
0.0074633 Eth
$614,840.00
21,356.670 LINK
0.0501%
70
HashKey Exchange
LINK-USD$28.79
0.0074809 Eth
$614,183.00
20,813.540 LINK
0.0489%
71
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$28.77
0.0074590 Eth
$599,413.00
20,335.697 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0477%
72
XT.COM
LINK-BTC$28.73
0.0074688 Eth
$578,144.00
19,585.400 LINK
0.0460%
73
XT.COM
LINK-ETH$28.75
0.0074538 Eth
$572,781.00
19,436.860 LINK
0.0456%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$28.71
0.0074431 Eth
$556,053.00
19,069.768 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0448%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$28.75
0.0074520 Eth
$542,466.00
18,443.274 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0433%
76
BitDelta
LINK-USDT$28.76
0.0074566 Eth
$525,986.00
17,793.000 LINK
0.0418%
77
Slex
LINK-ETH$28.71
0.0074437 Eth
$522,501.00
17,786.320 LINK
0.0418%
78
WEEX
LINK-USDC$28.68
0.0074551 Eth
$500,406.00
17,447.288 LINK
0.0410%
79
Coinone
LINK-KRW$28.95
0.0075022 Eth
$493,577.00
17,047.769 LINK
0.0400%
80
BitStorage
LINK-ETH$28.76
0.0074553 Eth
$469,672.00
16,333.410 LINK
0.0383%
81
BitMart
LINK-ETH$28.71
0.0074437 Eth
$459,924.00
16,019.140 LINK
0.0376%
82
Binance US
LINK-USDT$28.74
0.0074510 Eth
$423,137.00
14,723.693 LINK
0.0346%
83
Bitso
LINK-USD$28.68
0.0074373 Eth
$403,511.00
14,067.560 LINK
0.0330%
84
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$28.83
0.0074752 Eth
$393,352.00
13,438.685 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0316%
85
EXMO
LINK-BTC$28.78
0.0074632 Eth
$378,824.00
13,160.954 LINK
0.0309%
86
Kraken
LINK-GBP$28.66
0.0074262 Eth
$334,489.00
11,671.248 LINK
0.0274%
87
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$28.63
0.0074229 Eth
$296,867.00
10,079.337 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0237%
88
Sushiswap
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$28.81
0.0074706 Eth
$271,601.00
9,226.208 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0217%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$28.69
0.0074374 Eth
$268,333.00
9,097.178 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0214%
90
BitStorage
LINK-BTC$28.80
0.0074667 Eth
$261,853.00
9,093.000 LINK
0.0213%
91
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$28.70
0.0074407 Eth
$220,453.00
226,904.294 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5327%
92
Coinbase Exchange
LINK-ETH$28.87
0.0074867 Eth
$217,316.00
7,526.200 LINK
0.0177%
93
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$28.71
0.0074417 Eth
$192,904.00
6,588.845 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0155%
94
Korbit
LINK-KRW$28.88
0.0074900 Eth
$172,766.00
5,840.582 LINK
0.0137%
95
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$28.73
0.0074493 Eth
$166,691.00
170,456.693 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4002%
96
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$28.76
0.0074576 Eth
$146,056.00
5,116.036 0X5947BB275C521040051D82396192181B413227A3
0.0120%
97
Foxbit
LINK-BRL$28.96
0.0075105 Eth
$145,458.00
4,900.499 LINK
0.0115%
98
BYDFi
LINK-USDC$28.70
0.0074592 Eth
$109,209.00
3,804.680 LINK
0.0089%
99
Mercado Bitcoin
LINK-BRL$28.93
0.0075002 Eth
$101,918.00
3,522.731 LINK
0.0083%
100
Independent Reserve
LINK-AUD$28.62
0.0074203 Eth
$85,982.00
3,004.251 LINK
0.0071%

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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