ETH Price: $3,237.57 (-5.52%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

726,835 ( -0.010%)

Market

Price

$23.86 @ 0.007370 ETH (-1.50%)

Onchain Market Cap

$23,860,000,000.00

Circulating Supply Market Cap

$15,045,892,066.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
1,000 LINK

Value
$23,860.00 ( ~7.3697 Eth) [0.0001%]
0xC708B24A8a31731BD4f92d80e57f87A2673BfDC1
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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 21590.91% |ETH 0.0003846 1816.28%

Market

Volume (24H):$1,208,470,859.00
Market Capitalization:$15,045,892,066.00
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$23.99
0.0073824 Eth
$162,398,115.00
6,650,214.740 LINK
19.9254%
2
Coinbase Exchange
LINK-USD$23.86
0.0073436 Eth
$79,301,051.00
3,323,180.300 LINK
9.9569%
3
Upbit
LINK-KRW$24.39
0.0075269 Eth
$57,714,146.00
2,366,045.960 LINK
7.0891%
4
Bybit
LINK-USDT$23.80
0.0073451 Eth
$49,798,506.00
2,038,223.791 LINK
6.1069%
5
P2B
LINK-USDT$23.94
0.0073680 Eth
$32,181,985.00
1,344,041.910 LINK
4.0270%
6
Slex
LINK-USDT$23.80
0.0073332 Eth
$24,096,632.00
984,834.510 LINK
2.9508%
7
OKX
LINK-USDT$23.75
0.0073412 Eth
$21,479,618.00
879,300.398 LINK
2.6346%
8
DigiFinex
LINK-USDT$23.74
0.0073371 Eth
$20,029,259.00
843,713.080 LINK
2.5279%
9
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.99
0.0073833 Eth
$19,293,553.00
820,911.756 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.4596%
10
Gate.io
LINK-USDT$23.76
0.0073370 Eth
$18,326,356.00
751,222.360 LINK
2.2508%
11
Binance
LINK-FDUSD$23.95
0.0073546 Eth
$17,027,671.00
698,338.950 LINK
2.0924%
12
HTX
LINK-USDT$23.74
0.0073301 Eth
$16,443,508.00
672,606.712 LINK
2.0153%
13
XT.COM
LINK-USDT$23.81
0.0073348 Eth
$16,227,599.00
664,594.590 LINK
1.9913%
14
Azbit
LINK-USDT$23.87
0.0073498 Eth
$16,168,591.00
662,419.367 LINK
1.9847%
15
Coinstore
LINK-USDT$23.95
0.0073748 Eth
$14,043,024.00
575,211.440 LINK
1.7234%
16
MEXC
LINK-USDT$23.75
0.0073178 Eth
$13,601,257.00
572,732.860 LINK
1.7160%
17
Bithumb
LINK-KRW$24.37
0.0075244 Eth
$12,881,242.00
528,673.357 LINK
1.5840%
18
Bitunix
LINK-USDT$23.80
0.0073343 Eth
$12,107,872.00
508,597.580 LINK
1.5239%
19
CoinW
LINK-USDT$23.93
0.0073634 Eth
$10,609,747.00
443,339.700 LINK
1.3283%
20
Binance
LINK-USDC$23.76
0.0073449 Eth
$10,444,954.00
428,492.690 LINK
1.2838%
21
Hotcoin
LINK-USDT$23.92
0.0073631 Eth
$9,585,284.00
400,781.810 LINK
1.2008%
22
BYDFi
LINK-USDT$23.73
0.0073117 Eth
$8,863,855.00
373,560.900 LINK
1.1193%
23
KuCoin
LINK-USDT$23.72
0.0073163 Eth
$8,374,948.00
353,149.342 LINK
1.0581%
24
LATOKEN
LINK-USDT$23.94
0.0073660 Eth
$8,178,103.00
341,609.180 LINK
1.0235%
25
BTSE
LINK-USDT$23.82
0.0073363 Eth
$8,058,679.00
338,264.142 LINK
1.0135%
26
LBank
LINK-USDT$23.77
0.0073240 Eth
$7,830,547.00
329,457.740 LINK
0.9871%
27
Kraken
LINK-USD$23.72
0.0073252 Eth
$7,230,629.00
304,830.420 LINK
0.9133%
28
QMall
LINK-USDT$23.87
0.0073446 Eth
$6,619,007.00
270,993.548 LINK
0.8120%
29
Bitvavo
LINK-EUR$23.75
0.0073174 Eth
$5,255,578.00
221,319.178 LINK
0.6631%
30
Dex-Trade
LINK-USDT$23.75
0.0073345 Eth
$5,169,269.00
217,651.270 LINK
0.6521%
31
Crypto.com Exchange
LINK-USD$23.78
0.0073366 Eth
$4,545,012.00
191,159.640 LINK
0.5728%
32
FMCPAY
LINK-USDT$23.80
0.0073351 Eth
$4,538,794.00
185,191.718 LINK
0.5549%
33
Coinbase Exchange
LINK-EUR$23.72
0.0073264 Eth
$4,296,798.00
181,116.290 LINK
0.5427%
34
CoinEx
LINK-USDT$23.86
0.0073416 Eth
$4,223,126.00
173,305.438 LINK
0.5193%
35
Biconomy.com
LINK-USDT$23.75
0.0073266 Eth
$2,754,479.00
112,763.850 LINK
0.3379%
36
PointPay
LINK-USDT$24.03
0.0073865 Eth
$2,622,929.00
107,358.479 LINK
0.3217%
37
Kraken
LINK-EUR$23.72
0.0073240 Eth
$1,996,597.00
84,187.177 LINK
0.2522%
38
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.84
0.0073546 Eth
$1,912,300.00
82,098.273 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2460%
39
FMCPAY
LINK-ETH$23.87
0.0073549 Eth
$1,787,252.00
76,418.560 LINK
0.2290%
40
FMCPAY
LINK-BTC$23.81
0.0073374 Eth
$1,772,124.00
72,898.150 LINK
0.2184%
41
Phemex
LINK-USDT$23.93
0.0073623 Eth
$1,755,620.00
73,367.070 LINK
0.2198%
42
EXMO
LINK-USDT$23.74
0.0073239 Eth
$1,685,348.00
70,992.525 LINK
0.2127%
43
ProBit Global
LINK-USDT$23.77
0.0073333 Eth
$1,643,829.00
69,155.442 LINK
0.2072%
44
Bitbank
LINK-JPY$23.99
0.0073819 Eth
$1,456,628.00
60,719.896 LINK
0.1819%
45
Coinbase Exchange
LINK-GBP$23.72
0.0073266 Eth
$1,334,455.00
56,247.500 LINK
0.1685%
46
BigONE
LINK-USDT$23.64
0.0072928 Eth
$1,310,220.00
55,426.600 LINK
0.1661%
47
BitStorage
LINK-USDT$23.92
0.0073618 Eth
$1,294,535.00
54,109.880 LINK
0.1621%
48
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.91
0.0073575 Eth
$1,226,917.00
50,104.242 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1501%
49
itBit
LINK-USD$23.79
0.0073305 Eth
$1,221,706.00
51,353.744 LINK
0.1539%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.84
0.0073448 Eth
$1,209,370.00
51,623.049 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1547%
51
Binance
LINK-EUR$23.90
0.0073540 Eth
$1,192,712.00
49,091.550 LINK
0.1471%
52
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.95
0.0073694 Eth
$1,173,172.00
82,041.216 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2458%
53
Kraken
LINK-USDT$23.78
0.0073427 Eth
$1,145,191.00
48,164.190 LINK
0.1443%
54
Binance
LINK-TRY$23.95
0.0073777 Eth
$1,132,812.00
46,282.440 LINK
0.1387%
55
Coinbase Exchange
LINK-ETH$23.94
0.0073872 Eth
$1,072,354.00
44,784.260 LINK
0.1342%
56
EarnBIT
LINK-USDT$23.97
0.0073774 Eth
$978,915.00
40,023.958 LINK
0.1199%
57
Coinbase Exchange
LINK-USDT$23.82
0.0073294 Eth
$976,820.00
41,016.001 LINK
0.1229%
58
Gemini
LINK-USD$23.69
0.0073086 Eth
$936,372.00
39,534.271 LINK
0.1185%
59
Trubit
LINK-USDT$23.83
0.0073325 Eth
$894,406.00
36,634.200 LINK
0.1098%
60
Curve (Ethereum)
0XB8B295DF2CD735B15BE5EB419517AA626FC43CD5-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.03
0.0073856 Eth
$886,048.00
37,146.087 0XB8B295DF2CD735B15BE5EB419517AA626FC43CD5
0.1113%
61
QMall
LINK-USDC$23.78
0.0073378 Eth
$822,382.00
33,689.099 LINK
0.1009%
62
Bybit
LINK-USDC$23.79
0.0073413 Eth
$799,402.00
32,635.843 LINK
0.0978%
63
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.91
0.0073573 Eth
$792,817.00
806,872.484 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.4176%
64
LATOKEN
LINK-BTC$23.87
0.0073473 Eth
$768,254.00
32,178.271 LINK
0.0964%
65
tanX
LINK-USDC$23.90
0.0073607 Eth
$746,058.00
30,340.740 LINK
0.0909%
66
ProBit Global
LINK-BTC$23.80
0.0073413 Eth
$715,481.00
30,067.169 LINK
0.0901%
67
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.81
0.0073286 Eth
$690,151.00
29,654.134 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0888%
68
Bitso
LINK-USD$23.89
0.0073628 Eth
$613,478.00
25,674.126 LINK
0.0769%
69
GMO Japan
LINK-JPY$23.93
0.0073630 Eth
$607,312.00
25,382.900 LINK
0.0761%
70
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.84
0.0073545 Eth
$580,015.00
594,528.411 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7813%
71
Coinbase Exchange
LINK-BTC$23.84
0.0073419 Eth
$545,464.00
22,878.370 LINK
0.0685%
72
Kraken
LINK-ETH$23.84
0.0073629 Eth
$516,901.00
21,680.014 LINK
0.0650%
73
OKX
LINK-USDC$23.72
0.0073310 Eth
$448,392.00
18,343.488 LINK
0.0550%
74
Coinone
LINK-KRW$24.38
0.0075227 Eth
$372,552.00
15,281.696 LINK
0.0458%
75
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.79
0.0073405 Eth
$370,419.00
15,100.819 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0452%
76
Bitkub
LINK-THB$23.92
0.0073619 Eth
$367,187.00
15,347.806 LINK
0.0460%
77
HashKey Exchange
LINK-USD$23.70
0.0073030 Eth
$363,246.00
14,803.221 LINK
0.0444%
78
Hotcoin
LINK-BTC$23.83
0.0073406 Eth
$342,619.00
14,378.320 LINK
0.0431%
79
BitDelta
LINK-USDT$23.95
0.0073691 Eth
$329,314.00
13,472.000 LINK
0.0404%
80
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.88
0.0073505 Eth
$320,240.00
13,653.484 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0409%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.88
0.0073686 Eth
$317,653.00
13,580.787 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0407%
82
PointPay
LINK-BTC$23.77
0.0073333 Eth
$295,638.00
12,136.612 LINK
0.0364%
83
BYDFi
LINK-USDC$24.02
0.0073842 Eth
$284,963.00
11,861.360 LINK
0.0355%
84
Binance US
LINK-USDT$23.90
0.0073536 Eth
$282,035.00
11,802.866 LINK
0.0354%
85
BitMart
LINK-BTC$23.96
0.0073802 Eth
$280,148.00
11,693.500 LINK
0.0350%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.85
0.0073397 Eth
$258,218.00
11,182.774 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0335%
87
Bitvavo
LINK-USDC$24.27
0.0074677 Eth
$255,273.00
10,516.667 LINK
0.0315%
88
BitStorage
LINK-ETH$23.92
0.0073621 Eth
$236,316.00
9,878.200 LINK
0.0296%
89
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.10
0.0074154 Eth
$225,992.00
9,640.385 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0289%
90
Slex
LINK-ETH$23.75
0.0073400 Eth
$224,826.00
9,632.450 LINK
0.0289%
91
Binance
LINK-BNB$24.05
0.0073965 Eth
$221,362.00
9,294.107 LINK
0.0278%
92
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.03
0.0073936 Eth
$213,467.00
8,688.728 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0260%
93
Kraken
LINK-GBP$23.98
0.0074067 Eth
$199,838.00
8,332.096 LINK
0.0250%
94
KuCoin
LINK-USDC$23.73
0.0073197 Eth
$188,136.00
7,929.468 LINK
0.0238%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.82
0.0073398 Eth
$176,919.00
7,246.791 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0217%
96
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.90
0.0073559 Eth
$162,985.00
166,370.572 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4985%
97
Mercado Bitcoin
LINK-BRL$23.76
0.0073367 Eth
$148,888.00
6,267.009 LINK
0.0188%
98
BitMart
LINK-ETH$23.96
0.0073800 Eth
$102,474.00
4,277.460 LINK
0.0128%
99
Coins.ph
LINK-PHP$23.85
0.0073488 Eth
$80,464.00
3,313.546 LINK
0.0099%
100
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.02
0.0073987 Eth
$78,823.00
3,383.302 0X514910771AF9CA656AF840DFF83E8264ECF986CA
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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