ETH Price: $2,685.19 (-2.57%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

736,333 ( 0.013%)

Market

Price

$17.80 @ 0.006629 ETH (-8.75%)

Onchain Market Cap

$17,800,000,000.00

Circulating Supply Market Cap

$11,353,610,513.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
334.896185735034175411 LINK

Value
$5,961.15 ( ~2.2200 Eth) [0.0000%]
0x4aadbf894a6a6bb48951846d91492022a3a7d0bb
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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 16081.82% |ETH 0.0003846 1623.61%

Market

Volume (24H):$676,634,222.00
Market Capitalization:$11,353,610,513.00
Circulating Supply:638,099,970.00 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$17.86
0.0066564 Eth
$77,539,047.00
4,172,530.870 LINK
17.2880%
2
MEXC
LINK-USDT$17.76
0.0066366 Eth
$43,310,154.00
2,438,450.520 LINK
10.1032%
3
Coinbase Exchange
LINK-USD$17.73
0.0066184 Eth
$29,917,230.00
1,687,188.720 LINK
6.9905%
4
Bybit
LINK-USDT$17.85
0.0066497 Eth
$29,544,461.00
1,583,316.162 LINK
6.5601%
5
HTX
LINK-USDT$17.87
0.0066577 Eth
$19,303,825.00
1,036,696.682 LINK
4.2953%
6
P2B
LINK-USDT$17.79
0.0066346 Eth
$15,229,961.00
855,926.530 LINK
3.5464%
7
MEXC
LINK-EUR$17.84
0.0066507 Eth
$13,277,304.00
744,383.550 LINK
3.0842%
8
MEXC
LINK-USDC$17.79
0.0066469 Eth
$12,609,622.00
708,726.580 LINK
2.9365%
9
Bitget
LINK-USDT$17.86
0.0066564 Eth
$11,442,999.00
613,658.421 LINK
2.5426%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.82
0.0066488 Eth
$11,236,820.00
606,991.267 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.5149%
11
Kraken
LINK-USD$17.85
0.0066511 Eth
$10,439,746.00
584,866.905 LINK
2.4233%
12
WhiteBIT
LINK-USDT$17.80
0.0066422 Eth
$9,621,634.00
540,671.550 LINK
2.2402%
13
DigiFinex
LINK-USDT$17.86
0.0066547 Eth
$9,098,070.00
509,425.660 LINK
2.1107%
14
Gate.io
LINK-USDT$17.85
0.0066519 Eth
$9,010,339.00
486,166.700 LINK
2.0143%
15
OKX
LINK-USDT$17.87
0.0066572 Eth
$9,000,539.00
484,853.738 LINK
2.0089%
16
XT.COM
LINK-USDT$17.70
0.0066068 Eth
$7,707,563.00
414,597.040 LINK
1.7178%
17
Coinstore
LINK-USDT$17.85
0.0066561 Eth
$6,656,206.00
358,350.620 LINK
1.4848%
18
KuCoin
LINK-USDT$17.86
0.0066595 Eth
$6,587,592.00
368,831.299 LINK
1.5282%
19
Binance
LINK-FDUSD$17.92
0.0066757 Eth
$5,652,267.00
305,381.120 LINK
1.2653%
20
Binance
LINK-USDC$17.77
0.0066387 Eth
$5,402,108.00
290,163.050 LINK
1.2022%
21
BTSE
LINK-USDT$17.88
0.0066647 Eth
$4,754,541.00
265,890.228 LINK
1.1017%
22
Azbit
LINK-USDT$17.77
0.0066421 Eth
$4,572,917.00
245,836.145 LINK
1.0186%
23
Bitunix
LINK-USDT$17.70
0.0066049 Eth
$4,530,842.00
256,112.130 LINK
1.0611%
24
BYDFi
LINK-USDT$17.85
0.0066523 Eth
$4,178,411.00
234,042.280 LINK
0.9697%
25
Hotcoin
LINK-USDT$17.69
0.0066031 Eth
$3,893,112.00
220,063.510 LINK
0.9118%
26
LATOKEN
LINK-USDT$17.76
0.0066358 Eth
$3,627,843.00
204,247.480 LINK
0.8463%
27
Coinbase Exchange
LINK-GBP$17.70
0.0066138 Eth
$3,473,801.00
196,221.230 LINK
0.8130%
28
QMall
LINK-USDT$17.87
0.0066647 Eth
$3,013,866.00
162,229.910 LINK
0.6722%
29
FMCPAY
LINK-USDT$17.75
0.0066318 Eth
$2,926,792.00
157,477.319 LINK
0.6525%
30
Coinbase Exchange
LINK-EUR$17.71
0.0066161 Eth
$2,765,954.00
156,184.650 LINK
0.6471%
31
Bitvavo
LINK-EUR$17.86
0.0066606 Eth
$2,422,403.00
135,603.795 LINK
0.5618%
32
Dex-Trade
LINK-USDT$17.88
0.0066717 Eth
$2,279,539.00
127,495.950 LINK
0.5283%
33
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.80
0.0066311 Eth
$2,254,083.00
122,570.512 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5078%
34
CoinEx
LINK-USDT$17.78
0.0066313 Eth
$1,832,132.00
99,535.105 LINK
0.4124%
35
Biconomy.com
LINK-USDT$17.77
0.0066431 Eth
$1,501,272.00
80,638.520 LINK
0.3341%
36
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.77
0.0066198 Eth
$1,491,046.00
79,804.202 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3307%
37
FMCPAY
LINK-BTC$17.83
0.0066497 Eth
$1,226,290.00
66,044.000 LINK
0.2736%
38
FMCPAY
LINK-ETH$17.74
0.0066293 Eth
$1,225,763.00
66,671.680 LINK
0.2762%
39
PointPay
LINK-USDT$17.77
0.0066356 Eth
$1,183,106.00
63,663.319 LINK
0.2638%
40
Gemini
LINK-USD$17.84
0.0066487 Eth
$1,015,787.00
56,927.931 LINK
0.2359%
41
Binance
LINK-ETH$17.83
0.0066425 Eth
$867,078.00
47,373.280 LINK
0.1963%
42
tanX
LINK-USDC$17.85
0.0066532 Eth
$806,565.00
43,438.670 LINK
0.1800%
43
EXMO
LINK-USDT$17.81
0.0066414 Eth
$782,974.00
43,957.859 LINK
0.1821%
44
Trubit
LINK-USDT$17.80
0.0066487 Eth
$766,951.00
41,233.280 LINK
0.1708%
45
WhiteBIT
LINK-BTC$17.83
0.0066468 Eth
$747,404.00
41,925.960 LINK
0.1737%
46
Phemex
LINK-USDT$17.89
0.0066777 Eth
$741,883.00
41,459.580 LINK
0.1718%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.82
0.0066462 Eth
$642,927.00
34,439.484 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1427%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.77
0.0066290 Eth
$613,742.00
33,223.947 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1377%
49
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.82
0.0066462 Eth
$604,096.00
633,551.581 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.6250%
50
BitStorage
LINK-USDT$17.84
0.0066492 Eth
$594,899.00
33,341.590 LINK
0.1381%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.81
0.0066445 Eth
$591,790.00
33,022.410 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1368%
52
Bitbank
LINK-JPY$17.88
0.0066639 Eth
$584,951.00
32,711.421 LINK
0.1355%
53
LATOKEN
LINK-BTC$17.70
0.0066148 Eth
$552,368.00
31,201.977 LINK
0.1293%
54
BigONE
LINK-USDT$18.00
0.0067110 Eth
$545,984.00
30,339.100 LINK
0.1257%
55
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.83
0.0066418 Eth
$518,731.00
543,923.735 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
2.2536%
56
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.95
0.0066974 Eth
$506,464.00
54,237.119 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2247%
57
Binance
LINK-EUR$17.87
0.0066698 Eth
$503,536.00
27,384.570 LINK
0.1135%
58
Kraken
LINK-XBT$17.75
0.0066130 Eth
$447,447.00
25,211.475 LINK
0.1045%
59
QMall
LINK-USDC$17.86
0.0066587 Eth
$427,311.00
22,989.854 LINK
0.0953%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.79
0.0066354 Eth
$401,200.00
21,745.421 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0901%
61
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.84
0.0066508 Eth
$380,778.00
20,752.320 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0860%
62
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.83
0.0066418 Eth
$371,172.00
20,066.011 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0831%
63
Binance
LINK-TRY$17.91
0.0066814 Eth
$364,396.00
19,598.760 LINK
0.0812%
64
Coinbase Exchange
LINK-USDT$17.84
0.0066555 Eth
$323,971.00
18,157.231 LINK
0.0752%
65
OKX
LINK-USDC$17.86
0.0066539 Eth
$316,616.00
16,949.428 LINK
0.0702%
66
BitDelta
LINK-USDT$17.85
0.0066523 Eth
$303,014.00
16,316.000 LINK
0.0676%
67
itBit
LINK-USD$17.83
0.0066611 Eth
$279,083.00
15,652.416 LINK
0.0649%
68
Binance US
LINK-USDT$17.87
0.0066732 Eth
$248,961.00
13,934.813 LINK
0.0577%
69
BitMart
LINK-BTC$17.82
0.0066454 Eth
$237,069.00
13,301.420 LINK
0.0551%
70
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.73
0.0066149 Eth
$225,976.00
12,132.100 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0503%
71
Bitci TR
LINK-TRY$17.92
0.0066814 Eth
$191,079.00
10,220.640 LINK
0.0423%
72
WhiteBIT
LINK-EUR$17.89
0.0066825 Eth
$190,524.00
10,651.390 LINK
0.0441%
73
BitStorage
LINK-ETH$17.82
0.0066488 Eth
$185,284.00
10,395.870 LINK
0.0431%
74
Slex
LINK-ETH$17.76
0.0066390 Eth
$177,816.00
9,736.490 LINK
0.0403%
75
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.81
0.0066534 Eth
$160,638.00
8,595.002 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0356%
76
CoinTR
LINK-TRY$17.77
0.0066403 Eth
$158,715.00
8,540.070 LINK
0.0354%
77
Coinbase Exchange
LINK-BTC$17.85
0.0066532 Eth
$149,204.00
8,357.200 LINK
0.0346%
78
Hotcoin
LINK-BTC$17.75
0.0066292 Eth
$138,573.00
7,807.630 LINK
0.0323%
79
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.91
0.0066719 Eth
$128,403.00
6,904.416 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0286%
80
BYDFi
LINK-USDC$17.84
0.0066491 Eth
$127,613.00
7,151.400 LINK
0.0296%
81
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.91
0.0066731 Eth
$112,545.00
6,143.021 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0255%
82
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.79
0.0066325 Eth
$112,510.00
118,395.013 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4905%
83
Bitkub
LINK-THB$18.02
0.0067045 Eth
$99,118.00
5,500.280 LINK
0.0228%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.83
0.0066418 Eth
$95,617.00
100,449.240 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4162%
85
KuCoin
LINK-USDC$17.86
0.0066609 Eth
$83,480.00
4,672.946 LINK
0.0194%
86
Bitso
LINK-USD$17.73
0.0066180 Eth
$81,792.00
4,612.980 LINK
0.0191%
87
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.79
0.0066325 Eth
$76,082.00
4,117.608 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0171%
88
Binance US
LINK-BTC$17.84
0.0066649 Eth
$70,251.00
3,936.993 LINK
0.0163%
89
BitMart
LINK-ETH$17.83
0.0066484 Eth
$66,269.00
3,716.560 LINK
0.0154%
90
Bitstamp
LINK-GBP$17.75
0.0066148 Eth
$60,772.00
3,423.275 LINK
0.0142%
91
Kanga
LINK-PLN$17.91
0.0066861 Eth
$60,639.00
0.000 LINK
0.0000%
92
Tokenize
LINK-ETH$17.74
0.0066165 Eth
$55,558.00
3,132.169 LINK
0.0130%
93
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.88
0.0066662 Eth
$53,228.00
2,890.722 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0120%
94
Binance
LINK-BNB$17.80
0.0066352 Eth
$47,918.00
2,606.206 LINK
0.0108%
95
KuCoin
LINK-BTC$17.82
0.0066458 Eth
$43,604.00
2,446.359 LINK
0.0101%
96
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.82
0.0066486 Eth
$43,559.00
2,334.211 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0097%
97
Hotcoin
LINK-ETH$17.76
0.0066325 Eth
$38,528.00
2,169.730 LINK
0.0090%
98
Mercado Bitcoin
LINK-BRL$17.99
0.0067053 Eth
$36,621.00
2,035.260 LINK
0.0084%
99
Dex-Trade
LINK-ETH$17.82
0.0066471 Eth
$24,148.00
1,355.120 LINK
0.0056%
100
Crypto.com Exchange
LINK-BTC$17.73
0.0066101 Eth
$19,458.87
1,097.620 LINK
0.0045%

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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