ETH Price: $3,638.31 (+3.22%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,238 ( -0.008%)

Market

Price

$23.68 @ 0.006509 ETH (+4.19%)

Onchain Market Cap

$23,680,000,000.00

Circulating Supply Market Cap

$14,956,860,239.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
304.58749544 LINK

Value
$7,212.63 ( ~1.9824 Eth) [0.0000%]
0xf81083ce44eb44c7fb1d5f6f86a377b8bddb6433
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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 21427.27% |ETH 0.0003846 1592.41%

Market

Volume (24H):$985,688,110.00
Market Capitalization:$14,956,860,239.00
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
Coinbase Exchange
LINK-USD$23.65
0.0065033 Eth
$36,995,785.00
1,564,039.260 LINK
9.2714%
2
Upbit
LINK-KRW$23.88
0.0065672 Eth
$32,267,235.00
1,351,180.089 LINK
8.0096%
3
Bitget
LINK-USDT$23.69
0.0065157 Eth
$26,149,878.00
1,117,255.978 LINK
6.6229%
4
P2B
LINK-USDT$23.69
0.0065143 Eth
$22,857,380.00
964,693.280 LINK
5.7186%
5
Bybit
LINK-USDT$23.67
0.0065102 Eth
$21,949,025.00
938,174.532 LINK
5.5614%
6
WhiteBIT
LINK-USDT$23.70
0.0065156 Eth
$21,815,779.00
920,546.240 LINK
5.4569%
7
MEXC
LINK-USDT$23.67
0.0065074 Eth
$21,447,919.00
906,290.450 LINK
5.3724%
8
CoinW
LINK-USDT$23.69
0.0065154 Eth
$20,247,939.00
854,545.580 LINK
5.0656%
9
OKX
LINK-USDT$23.70
0.0065175 Eth
$17,788,243.00
762,105.197 LINK
4.5177%
10
DigiFinex
LINK-USDT$23.65
0.0065041 Eth
$14,268,580.00
603,286.380 LINK
3.5762%
11
XT.COM
LINK-USDT$23.66
0.0065046 Eth
$10,853,894.00
464,449.780 LINK
2.7532%
12
HTX
LINK-USDT$23.65
0.0065044 Eth
$10,100,660.00
432,810.484 LINK
2.5656%
13
Coinstore
LINK-USDT$23.64
0.0065000 Eth
$9,755,983.00
417,559.560 LINK
2.4752%
14
Bitunix
LINK-USDT$23.67
0.0065089 Eth
$8,555,885.00
361,561.310 LINK
2.1433%
15
Binance
LINK-FDUSD$23.68
0.0065110 Eth
$8,352,760.00
357,219.470 LINK
2.1175%
16
Azbit
LINK-USDT$23.77
0.0065272 Eth
$7,621,374.00
325,617.456 LINK
1.9302%
17
Biconomy.com
LINK-USDT$23.68
0.0065117 Eth
$7,531,296.00
322,771.400 LINK
1.9133%
18
BYDFi
LINK-USDT$23.65
0.0064929 Eth
$7,089,909.00
299,745.430 LINK
1.7768%
19
Kraken
LINK-USD$23.74
0.0065271 Eth
$7,034,179.00
296,334.053 LINK
1.7566%
20
Bithumb
LINK-KRW$23.83
0.0065516 Eth
$6,239,958.00
261,894.322 LINK
1.5525%
21
Binance
LINK-USDC$23.71
0.0065203 Eth
$5,808,261.00
248,804.470 LINK
1.4749%
22
LBank
LINK-USDT$23.74
0.0065178 Eth
$5,463,714.00
230,128.010 LINK
1.3642%
23
LATOKEN
LINK-USDT$23.68
0.0065110 Eth
$5,283,949.00
223,114.568 LINK
1.3226%
24
Hotcoin
LINK-USDT$23.64
0.0064900 Eth
$3,574,650.00
151,224.410 LINK
0.8964%
25
Dex-Trade
LINK-USDT$23.67
0.0065103 Eth
$3,488,948.00
147,376.450 LINK
0.8736%
26
CoinEx
LINK-USDT$23.72
0.0065209 Eth
$3,354,859.00
143,359.229 LINK
0.8498%
27
KuCoin
LINK-USDT$23.66
0.0065052 Eth
$3,280,708.00
138,687.974 LINK
0.8221%
28
ProBit Global
LINK-USDT$23.65
0.0065040 Eth
$2,848,459.00
120,437.036 LINK
0.7139%
29
Bitvavo
LINK-EUR$23.79
0.0065313 Eth
$2,474,284.00
103,997.686 LINK
0.6165%
30
Coinbase Exchange
LINK-BTC$23.67
0.0065090 Eth
$2,093,784.00
88,453.270 LINK
0.5243%
31
Dcoin
LINK-USDT$23.69
0.0065000 Eth
$1,871,869.00
79,006.000 LINK
0.4683%
32
PointPay
LINK-USDT$23.69
0.0065153 Eth
$1,624,248.00
69,394.091 LINK
0.4114%
33
EXMO
LINK-USDT$23.68
0.0065130 Eth
$1,563,422.00
66,012.820 LINK
0.3913%
34
Bybit
LINK-USDC$23.66
0.0065066 Eth
$1,449,422.00
61,753.028 LINK
0.3661%
35
Phemex
LINK-USDT$23.69
0.0065157 Eth
$1,281,173.00
54,072.520 LINK
0.3205%
36
Coinbase Exchange
LINK-EUR$23.71
0.0065176 Eth
$1,280,305.00
54,007.300 LINK
0.3201%
37
tanX
LINK-USDC$23.70
0.0065159 Eth
$1,183,841.00
50,660.570 LINK
0.3003%
38
Bitbank
LINK-JPY$23.74
0.0065267 Eth
$967,691.00
40,759.538 LINK
0.2416%
39
BitStorage
LINK-USDT$23.71
0.0065204 Eth
$894,772.00
37,733.890 LINK
0.2237%
40
WhiteBIT
LINK-BTC$23.69
0.0065143 Eth
$832,556.00
35,137.620 LINK
0.2083%
41
Coinbase Exchange
LINK-GBP$23.68
0.0065100 Eth
$830,856.00
35,089.440 LINK
0.2080%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.73
0.0065239 Eth
$769,342.00
32,426.027 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1922%
43
EarnBIT
LINK-USDT$23.73
0.0065234 Eth
$737,014.00
31,502.245 LINK
0.1867%
44
WhiteBIT
LINK-TRY$23.70
0.0065172 Eth
$673,351.00
28,406.030 LINK
0.1684%
45
itBit
LINK-USD$23.72
0.0065131 Eth
$646,484.00
27,254.826 LINK
0.1616%
46
Gemini
LINK-USD$23.66
0.0065052 Eth
$646,044.00
27,310.992 LINK
0.1619%
47
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.71
0.0065202 Eth
$637,175.00
41,792.473 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2477%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.63
0.0064964 Eth
$617,125.00
26,115.698 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1548%
49
BigONE
LINK-USDT$23.61
0.0064818 Eth
$556,973.00
23,591.540 LINK
0.1398%
50
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.63
0.0064975 Eth
$536,447.00
22,888.042 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1357%
51
Binance
LINK-TRY$23.72
0.0065221 Eth
$516,427.00
22,129.970 LINK
0.1312%
52
Binance
LINK-EUR$23.74
0.0065171 Eth
$496,442.00
21,227.610 LINK
0.1258%
53
GMO Japan
LINK-JPY$23.59
0.0064733 Eth
$448,262.00
19,003.400 LINK
0.1126%
54
Bitbegin
LINK-USDT$23.67
0.0064973 Eth
$427,797.00
18,327.991 LINK
0.1086%
55
Slex
LINK-ETH$23.72
0.0065121 Eth
$427,151.00
18,078.400 LINK
0.1072%
56
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.69
0.0065155 Eth
$360,212.00
15,209.636 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0902%
57
Coinbase Exchange
LINK-ETH$23.72
0.0065238 Eth
$339,632.00
14,315.430 LINK
0.0849%
58
BitMart
LINK-BTC$23.71
0.0065200 Eth
$296,847.00
12,520.460 LINK
0.0742%
59
Coinbase Exchange
LINK-USDT$23.73
0.0065249 Eth
$271,651.00
11,446.314 LINK
0.0679%
60
LATOKEN
LINK-BTC$23.69
0.0065122 Eth
$270,112.00
11,403.693 LINK
0.0676%
61
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.76
0.0065341 Eth
$268,656.00
264,046.402 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.5652%
62
Binance
LINK-BRL$23.88
0.0065661 Eth
$256,737.00
10,932.030 LINK
0.0648%
63
OKX
LINK-USDC$23.66
0.0065067 Eth
$256,522.00
10,964.664 LINK
0.0650%
64
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.63
0.0064964 Eth
$250,831.00
247,967.392 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.4699%
65
Bitci TR
LINK-TRY$23.84
0.0065453 Eth
$239,220.00
10,278.090 LINK
0.0609%
66
Bitkub
LINK-THB$23.62
0.0064946 Eth
$224,677.00
9,511.165 LINK
0.0564%
67
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.72
0.0065236 Eth
$219,509.00
9,405.518 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0558%
68
PointPay
LINK-BTC$23.65
0.0065020 Eth
$196,978.00
8,443.403 LINK
0.0501%
69
HashKey Exchange
LINK-USD$23.71
0.0065208 Eth
$191,802.00
8,189.180 LINK
0.0485%
70
Binance US
LINK-USDT$23.71
0.0065100 Eth
$170,293.00
7,181.966 LINK
0.0426%
71
Bitexen
LINK-TRY$23.49
0.0064585 Eth
$167,800.00
7,144.181 LINK
0.0423%
72
CoinEx
LINK-USDC$23.69
0.0065044 Eth
$160,805.00
6,974.696 LINK
0.0413%
73
BitStorage
LINK-ETH$23.71
0.0065185 Eth
$155,711.00
6,568.470 LINK
0.0389%
74
Bitso
LINK-USD$23.71
0.0065192 Eth
$154,431.00
6,512.143 LINK
0.0386%
75
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.63
0.0064964 Eth
$144,600.00
6,128.299 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0363%
76
Hotcoin
LINK-BTC$23.70
0.0065147 Eth
$125,870.00
5,311.830 LINK
0.0315%
77
EXMO
LINK-BTC$23.67
0.0065100 Eth
$120,207.00
5,077.882 LINK
0.0301%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.74
0.0065278 Eth
$117,379.00
4,950.455 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0293%
79
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.69
0.0065132 Eth
$115,540.00
4,880.527 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0289%
80
CoinEx
LINK-BTC$23.67
0.0065069 Eth
$104,413.00
4,448.493 LINK
0.0264%
81
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.69
0.0065147 Eth
$99,061.00
4,233.511 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0251%
82
BitMart
LINK-ETH$23.72
0.0065218 Eth
$95,832.00
4,040.500 LINK
0.0240%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.63
0.0064964 Eth
$76,217.00
3,260.746 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0193%
84
Mercado Bitcoin
LINK-BRL$23.85
0.0065590 Eth
$70,685.00
2,963.386 LINK
0.0176%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.72
0.0065214 Eth
$67,522.00
66,685.306 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3953%
86
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.75
0.0065307 Eth
$50,399.00
2,153.965 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0128%
87
Hotcoin
LINK-ETH$23.69
0.0065137 Eth
$44,394.00
1,873.750 LINK
0.0111%
88
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$23.65
0.0065041 Eth
$44,059.00
55.999 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0003%
89
Gemini
LINK-BTC$23.72
0.0065229 Eth
$42,276.00
1,782.342 LINK
0.0106%
90
Kraken
LINK-USDC$23.55
0.0064753 Eth
$41,553.00
1,764.537 LINK
0.0105%
91
Coins.ph
LINK-PHP$23.88
0.0065670 Eth
$40,916.00
1,754.235 LINK
0.0104%
92
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.61
0.0064908 Eth
$39,607.00
1,673.612 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0099%
93
Korbit
LINK-KRW$23.76
0.0065353 Eth
$34,540.00
1,469.908 LINK
0.0087%
94
zondacrypto
LINK-PLN$23.73
0.0065237 Eth
$33,318.00
1,404.159 LINK
0.0083%
95
Dex-Trade
LINK-ETH$23.70
0.0065179 Eth
$19,431.13
819.830 LINK
0.0049%
96
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$23.68
0.0065122 Eth
$17,709.48
756.427 0X5947BB275C521040051D82396192181B413227A3
0.0045%
97
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.65
0.0065025 Eth
$14,800.93
623.449 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0037%
98
Biswap V3
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.70
0.0065171 Eth
$10,022.72
427.374 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0025%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.75
0.0065293 Eth
$9,877.96
422.791 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0025%
100
Ace
LINK-USDT$23.69
0.0064988 Eth
$4,161.70
178.240 LINK
0.0011%

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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