ETH Price: $3,344.11 (+0.54%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

726,426 ( 0.000%)

Market

Price

$23.59 @ 0.007054 ETH (+10.34%)

Onchain Market Cap

$23,590,000,000.00

Circulating Supply Market Cap

$14,889,729,031.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
16 LINK

Value
$377.44 ( ~0.112867094290877 Eth) [0.0000%]
0x890d2106ba6d55064a50f54345a58ece1b4c6e2f
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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 21345.45% |ETH 0.0003846 1734.11%

Market

Volume (24H):$1,320,050,761.00
Market Capitalization:$14,889,729,031.00
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$23.49
0.0070292 Eth
$189,161,935.00
8,467,390.010 LINK
24.3539%
2
Coinbase Exchange
LINK-USD$23.54
0.0070456 Eth
$85,861,254.00
3,647,307.000 LINK
10.4904%
3
Upbit
LINK-KRW$23.61
0.0070632 Eth
$57,419,980.00
2,432,451.447 LINK
6.9962%
4
Bybit
LINK-USDT$23.54
0.0070438 Eth
$32,256,609.00
1,440,100.602 LINK
4.1420%
5
DigiFinex
LINK-USDT$23.55
0.0070459 Eth
$24,613,303.00
1,045,233.370 LINK
3.0063%
6
OKX
LINK-USDT$23.53
0.0070403 Eth
$23,067,326.00
1,029,991.592 LINK
2.9625%
7
Gate.io
LINK-USDT$23.54
0.0070432 Eth
$21,627,275.00
967,066.149 LINK
2.7815%
8
XT.COM
LINK-USDT$23.48
0.0070265 Eth
$18,882,822.00
845,259.030 LINK
2.4311%
9
FameEX
LINK-USDT$23.54
0.0070303 Eth
$18,876,684.00
845,159.770 LINK
2.4308%
10
Azbit
LINK-USDT$23.48
0.0070263 Eth
$18,670,829.00
835,845.322 LINK
2.4041%
11
KuCoin
LINK-USDT$23.53
0.0070396 Eth
$16,591,798.00
705,175.992 LINK
2.0282%
12
Coinstore
LINK-USDT$23.55
0.0070450 Eth
$15,749,182.00
706,668.290 LINK
2.0325%
13
HTX
LINK-USDT$23.53
0.0070393 Eth
$15,277,295.00
692,255.354 LINK
1.9911%
14
Bitunix
LINK-USDT$23.54
0.0070441 Eth
$14,955,809.00
635,418.660 LINK
1.8276%
15
MEXC
LINK-USDT$23.47
0.0070232 Eth
$14,257,172.00
607,494.000 LINK
1.7473%
16
CoinW
LINK-USDT$23.47
0.0070219 Eth
$13,727,043.00
584,960.500 LINK
1.6825%
17
Binance
LINK-FDUSD$23.56
0.0070490 Eth
$12,748,067.00
568,552.000 LINK
1.6353%
18
Bithumb
LINK-KRW$23.67
0.0070804 Eth
$12,375,776.00
522,953.339 LINK
1.5041%
19
BYDFi
LINK-USDT$23.46
0.0070211 Eth
$11,097,392.00
473,007.920 LINK
1.3605%
20
LBank
LINK-USDT$23.49
0.0070287 Eth
$9,619,307.00
409,552.080 LINK
1.1780%
21
LATOKEN
LINK-USDT$23.42
0.0070093 Eth
$9,206,024.00
393,025.293 LINK
1.1304%
22
Binance
LINK-USDC$23.52
0.0070370 Eth
$7,875,020.00
351,269.590 LINK
1.0103%
23
Kraken
LINK-USD$23.53
0.0070415 Eth
$7,764,733.00
329,923.069 LINK
0.9489%
24
QMall
LINK-USDT$23.53
0.0070288 Eth
$7,590,739.00
339,635.816 LINK
0.9769%
25
Hotcoin
LINK-USDT$23.54
0.0070426 Eth
$7,425,482.00
315,482.090 LINK
0.9074%
26
BTSE
LINK-USDT$23.48
0.0070255 Eth
$6,901,068.00
293,923.436 LINK
0.8454%
27
Dex-Trade
LINK-USDT$23.46
0.0070211 Eth
$6,080,854.00
259,170.600 LINK
0.7454%
28
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.54
0.0070420 Eth
$5,079,957.00
231,284.572 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.6652%
29
Bitvavo
LINK-EUR$23.57
0.0070297 Eth
$4,874,806.00
206,792.525 LINK
0.5948%
30
Coinbase Exchange
LINK-EUR$23.48
0.0070258 Eth
$4,216,785.00
179,601.370 LINK
0.5166%
31
ProBit Global
LINK-USDT$23.48
0.0070264 Eth
$4,070,068.00
173,364.151 LINK
0.4986%
32
FMCPAY
LINK-USDT$23.56
0.0070093 Eth
$3,593,056.00
161,393.299 LINK
0.4642%
33
CoinEx
LINK-USDT$23.56
0.0070476 Eth
$3,510,960.00
156,813.713 LINK
0.4510%
34
PointPay
LINK-USDT$23.47
0.0070240 Eth
$3,013,515.00
134,851.971 LINK
0.3879%
35
Biconomy.com
LINK-USDT$23.51
0.0070234 Eth
$2,908,834.00
130,692.898 LINK
0.3759%
36
Coinbase Exchange
LINK-GBP$23.53
0.0070404 Eth
$2,564,372.00
108,976.600 LINK
0.3134%
37
Kraken
LINK-EUR$23.55
0.0070457 Eth
$2,501,866.00
106,239.751 LINK
0.3056%
38
Phemex
LINK-USDT$23.48
0.0070265 Eth
$2,270,838.00
96,709.540 LINK
0.2782%
39
AscendEX (BitMax)
LINK-USDT$23.53
0.0070390 Eth
$1,857,636.00
78,958.300 LINK
0.2271%
40
EXMO
LINK-USDT$23.55
0.0070496 Eth
$1,833,241.00
77,829.819 LINK
0.2239%
41
FMCPAY
LINK-ETH$23.48
0.0070291 Eth
$1,641,249.00
74,541.920 LINK
0.2144%
42
BitStorage
LINK-USDT$23.50
0.0070323 Eth
$1,576,614.00
67,099.870 LINK
0.1930%
43
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.47
0.0070240 Eth
$1,555,979.00
69,816.247 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2008%
44
FMCPAY
LINK-BTC$23.55
0.0070302 Eth
$1,503,934.00
67,385.400 LINK
0.1938%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.46
0.0070191 Eth
$1,482,343.00
66,282.213 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1906%
46
Bitbank
LINK-JPY$23.51
0.0070347 Eth
$1,429,314.00
60,800.346 LINK
0.1749%
47
Bybit
LINK-USDC$23.54
0.0070446 Eth
$1,382,992.00
62,056.993 LINK
0.1785%
48
Binance
LINK-TRY$23.50
0.0070204 Eth
$1,353,972.00
59,777.280 LINK
0.1719%
49
Kraken
LINK-USDT$23.48
0.0070262 Eth
$1,347,818.00
57,393.013 LINK
0.1651%
50
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.48
0.0070241 Eth
$1,221,315.00
81,453.412 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2343%
51
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.45
0.0070137 Eth
$1,125,918.00
50,652.583 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1457%
52
BigONE
LINK-USDT$23.56
0.0070511 Eth
$1,115,391.00
47,343.820 LINK
0.1362%
53
EarnBIT
LINK-USDT$23.44
0.0070144 Eth
$1,089,842.00
48,818.689 LINK
0.1404%
54
itBit
LINK-USD$23.44
0.0070142 Eth
$1,059,313.00
45,192.529 LINK
0.1300%
55
Nonkyc.io
LINK-USDT$23.69
0.0070712 Eth
$1,048,214.00
47,032.169 LINK
0.1353%
56
Binance
LINK-EUR$23.51
0.0070313 Eth
$1,042,003.00
46,423.000 LINK
0.1335%
57
tanX
LINK-USDC$23.45
0.0070187 Eth
$1,000,697.00
45,256.950 LINK
0.1302%
58
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.41
0.0070042 Eth
$979,389.00
43,874.539 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1262%
59
Gemini
LINK-USD$23.55
0.0070473 Eth
$929,514.00
39,465.079 LINK
0.1135%
60
Coinbase Exchange
LINK-USDT$23.48
0.0070246 Eth
$923,769.00
39,347.946 LINK
0.1132%
61
Trubit
LINK-USDT$23.51
0.0070364 Eth
$843,086.00
38,167.410 LINK
0.1098%
62
Coinbase Exchange
LINK-ETH$23.49
0.0070276 Eth
$813,544.00
34,635.850 LINK
0.0996%
63
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.54
0.0070420 Eth
$809,182.00
36,966.416 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1063%
64
Bitkub
LINK-THB$23.53
0.0070406 Eth
$799,362.00
33,975.160 LINK
0.0977%
65
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.42
0.0070085 Eth
$787,334.00
745,625.170 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.1446%
66
LATOKEN
LINK-BTC$23.46
0.0070213 Eth
$767,226.00
32,698.397 LINK
0.0940%
67
OKX
LINK-USDC$23.54
0.0070442 Eth
$747,107.00
32,624.104 LINK
0.0938%
68
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.49
0.0070279 Eth
$724,149.00
692,190.034 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.9909%
69
Coinbase Exchange
LINK-BTC$23.49
0.0070273 Eth
$650,911.00
27,715.710 LINK
0.0797%
70
QMall
LINK-USDC$23.49
0.0070303 Eth
$635,175.00
28,347.394 LINK
0.0815%
71
ProBit Global
LINK-BTC$23.48
0.0070281 Eth
$632,335.00
26,927.731 LINK
0.0774%
72
GMO Japan
LINK-JPY$23.61
0.0070650 Eth
$535,545.00
22,687.200 LINK
0.0653%
73
HashKey Exchange
LINK-USD$23.52
0.0070354 Eth
$482,363.00
21,587.577 LINK
0.0621%
74
Slex
LINK-BTC$23.52
0.0070379 Eth
$415,749.00
18,514.000 LINK
0.0532%
75
Bitso
LINK-USD$23.49
0.0070299 Eth
$399,880.00
17,022.986 LINK
0.0490%
76
bitcastle
LINK-USDT$23.52
0.0070381 Eth
$357,254.00
16,012.770 LINK
0.0461%
77
Coinone
LINK-KRW$23.64
0.0070735 Eth
$354,334.00
14,988.675 LINK
0.0431%
78
BitDelta
LINK-USDT$23.52
0.0070389 Eth
$327,513.00
14,721.000 LINK
0.0423%
79
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.48
0.0070241 Eth
$321,566.00
14,327.640 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0412%
80
BitStorage
LINK-ETH$23.59
0.0070395 Eth
$299,908.00
12,711.320 LINK
0.0366%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.51
0.0070351 Eth
$295,438.00
13,146.515 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0378%
82
BitMart
LINK-BTC$23.48
0.0070260 Eth
$290,024.00
12,354.260 LINK
0.0355%
83
PointPay
LINK-BTC$23.48
0.0070282 Eth
$285,474.00
12,699.425 LINK
0.0365%
84
Hotcoin
LINK-BTC$23.53
0.0070409 Eth
$274,375.00
11,660.050 LINK
0.0335%
85
Slex
LINK-ETH$23.60
0.0070446 Eth
$267,533.00
12,127.330 LINK
0.0349%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.53
0.0070424 Eth
$265,352.00
11,944.738 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0344%
87
BYDFi
LINK-USDC$23.59
0.0070319 Eth
$238,956.00
10,129.540 LINK
0.0291%
88
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.43
0.0070115 Eth
$214,165.00
9,573.025 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0275%
89
Foxbit
LINK-BRL$23.36
0.0069899 Eth
$209,496.00
9,317.068 LINK
0.0268%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.49
0.0070279 Eth
$206,096.00
9,163.975 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0264%
91
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.63
0.0070700 Eth
$194,309.00
8,645.855 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0249%
92
KuCoin
LINK-USDC$23.47
0.0070221 Eth
$193,287.00
8,235.417 LINK
0.0237%
93
Mercado Bitcoin
LINK-BRL$23.32
0.0069768 Eth
$170,511.00
7,312.141 LINK
0.0210%
94
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.42
0.0070048 Eth
$167,996.00
7,494.753 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0216%
95
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.51
0.0070353 Eth
$155,541.00
6,975.916 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0201%
96
Binance US
LINK-USDT$23.48
0.0070253 Eth
$146,519.00
6,240.493 LINK
0.0179%
97
KuCoin
LINK-BTC$23.50
0.0070301 Eth
$141,193.00
6,008.972 LINK
0.0173%
98
Kraken
LINK-GBP$23.51
0.0070349 Eth
$127,793.00
5,435.004 LINK
0.0156%
99
Korbit
LINK-KRW$23.65
0.0070776 Eth
$110,902.00
4,875.420 LINK
0.0140%
100
BitMart
LINK-ETH$23.47
0.0070250 Eth
$105,855.00
4,509.820 LINK
0.0130%

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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