ETH Price: $3,337.77 (-1.89%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,405 ( 0.000%)

Market

Price

$20.50 @ 0.006142 ETH (-1.10%)

Onchain Market Cap

$20,500,000,000.00

Circulating Supply Market Cap

$12,927,434,049.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.001579059583807692 LINK

Value
$0.03 ( ~8.98802878678545E-06 Eth) [0.0000%]
0xce492446a82684c34880a445daa0eefc2b5dba5d
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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 18536.36% |ETH 0.0003846 1496.98%

Market

Volume (24H):$659,758,134.00
Market Capitalization:$12,927,434,049.00
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$20.50
0.0061354 Eth
$36,253,897.00
1,768,655.310 LINK
12.2046%
2
Slex
LINK-USDT$20.48
0.0061288 Eth
$20,551,299.00
1,024,512.170 LINK
7.0696%
3
WhiteBIT
LINK-USDT$20.49
0.0061351 Eth
$19,328,779.00
943,435.670 LINK
6.5102%
4
Bitget
LINK-USDT$20.50
0.0061404 Eth
$17,712,599.00
882,024.417 LINK
6.0864%
5
Bybit
LINK-USDT$20.49
0.0061369 Eth
$15,391,739.00
767,117.773 LINK
5.2935%
6
CoinW
LINK-USDT$20.51
0.0061286 Eth
$14,249,375.00
694,918.960 LINK
4.7953%
7
MEXC
LINK-USDT$20.51
0.0061375 Eth
$14,198,090.00
692,393.870 LINK
4.7779%
8
OKX
LINK-USDT$20.48
0.0061336 Eth
$10,396,882.00
518,072.272 LINK
3.5750%
9
DigiFinex
LINK-USDT$20.49
0.0061387 Eth
$10,137,920.00
494,697.820 LINK
3.4137%
10
HTX
LINK-USDT$20.51
0.0061430 Eth
$8,335,213.00
415,631.994 LINK
2.8681%
11
XT.COM
LINK-USDT$20.47
0.0061242 Eth
$7,918,220.00
394,986.060 LINK
2.7256%
12
Azbit
LINK-USDT$20.50
0.0061382 Eth
$7,885,774.00
393,301.359 LINK
2.7140%
13
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.50
0.0061415 Eth
$7,794,710.00
387,538.265 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.6742%
14
Coinstore
LINK-USDT$20.53
0.0061381 Eth
$7,198,652.00
359,196.880 LINK
2.4786%
15
Binance
LINK-FDUSD$20.48
0.0061236 Eth
$6,624,143.00
330,011.550 LINK
2.2772%
16
Bitunix
LINK-USDT$20.49
0.0061367 Eth
$6,217,471.00
303,469.160 LINK
2.0941%
17
Biconomy.com
LINK-USDT$20.49
0.0061386 Eth
$5,164,282.00
257,534.409 LINK
1.7771%
18
BYDFi
LINK-USDT$20.50
0.0061398 Eth
$5,022,946.00
245,060.970 LINK
1.6910%
19
Binance
LINK-USDC$20.51
0.0061378 Eth
$4,306,996.00
214,878.630 LINK
1.4828%
20
LBank
LINK-USDT$20.47
0.0061270 Eth
$4,001,769.00
195,490.550 LINK
1.3490%
21
BTSE
LINK-USDT$20.48
0.0061350 Eth
$3,968,926.00
193,788.718 LINK
1.3372%
22
LATOKEN
LINK-USDT$20.49
0.0061348 Eth
$3,831,947.00
187,009.463 LINK
1.2905%
23
QMall
LINK-USDT$20.47
0.0061197 Eth
$3,098,498.00
154,743.977 LINK
1.0678%
24
KuCoin
LINK-USDT$20.48
0.0061324 Eth
$2,958,247.00
144,455.040 LINK
0.9968%
25
Kraken
LINK-USD$20.48
0.0061340 Eth
$2,906,879.00
141,908.281 LINK
0.9792%
26
Hotcoin
LINK-USDT$20.47
0.0061288 Eth
$2,673,344.00
130,617.180 LINK
0.9013%
27
Dex-Trade
LINK-USDT$20.51
0.0061341 Eth
$2,517,578.00
122,734.760 LINK
0.8469%
28
CoinEx
LINK-USDT$20.50
0.0061375 Eth
$2,085,250.00
104,004.812 LINK
0.7177%
29
Dcoin
LINK-USDT$20.46
0.0061210 Eth
$1,819,900.00
88,929.000 LINK
0.6137%
30
Bitvavo
LINK-EUR$20.53
0.0061397 Eth
$1,764,038.00
85,919.574 LINK
0.5929%
31
PointPay
LINK-USDT$20.48
0.0061212 Eth
$1,128,770.00
56,427.428 LINK
0.3894%
32
EXMO
LINK-USDT$20.47
0.0061309 Eth
$1,076,335.00
52,570.828 LINK
0.3628%
33
Phemex
LINK-USDT$20.47
0.0061266 Eth
$906,773.00
44,299.750 LINK
0.3057%
34
tanX
LINK-USDC$20.54
0.0061471 Eth
$830,623.00
41,330.110 LINK
0.2852%
35
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.52
0.0061425 Eth
$825,924.00
40,945.723 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2825%
36
Bitstamp
LINK-EUR$20.53
0.0061511 Eth
$823,813.00
40,118.742 LINK
0.2768%
37
Bitbank
LINK-JPY$20.51
0.0061425 Eth
$794,753.00
38,744.597 LINK
0.2674%
38
WhiteBIT
LINK-BTC$20.47
0.0061207 Eth
$751,211.00
36,693.990 LINK
0.2532%
39
Bybit
LINK-USDC$20.47
0.0061319 Eth
$720,261.00
35,859.388 LINK
0.2474%
40
BitStorage
LINK-USDT$20.47
0.0061288 Eth
$658,383.00
32,162.230 LINK
0.2219%
41
Coinbase Exchange
LINK-EUR$20.50
0.0061386 Eth
$655,788.00
31,984.500 LINK
0.2207%
42
Binance
LINK-EUR$20.48
0.0061231 Eth
$627,083.00
31,238.840 LINK
0.2156%
43
WhiteBIT
LINK-TRY$20.61
0.0061752 Eth
$621,980.00
30,171.370 LINK
0.2082%
44
Gemini
LINK-USD$20.49
0.0061370 Eth
$604,571.00
29,509.676 LINK
0.2036%
45
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.52
0.0061429 Eth
$591,771.00
43,428.118 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2997%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.45
0.0061234 Eth
$574,253.00
28,706.677 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1981%
47
Binance
LINK-TRY$20.58
0.0061560 Eth
$540,901.00
26,864.420 LINK
0.1854%
48
GMO Japan
LINK-JPY$20.56
0.0061527 Eth
$514,367.00
25,020.000 LINK
0.1727%
49
HashKey Exchange
LINK-USD$20.53
0.0061450 Eth
$501,709.00
24,941.246 LINK
0.1721%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.47
0.0061288 Eth
$499,015.00
24,430.248 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1686%
51
Coinbase Exchange
LINK-USDT$20.47
0.0061292 Eth
$490,106.00
23,945.242 LINK
0.1652%
52
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.53
0.0061440 Eth
$482,980.00
474,020.724 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.2710%
53
EarnBIT
LINK-USDT$20.46
0.0061255 Eth
$473,167.00
23,647.374 LINK
0.1632%
54
KuCoin
LINK-USDC$20.51
0.0061414 Eth
$428,619.00
20,899.418 LINK
0.1442%
55
BigONE
LINK-USDT$20.51
0.0061392 Eth
$404,729.00
19,730.190 LINK
0.1361%
56
Kraken
LINK-ETH$20.51
0.0061417 Eth
$392,536.00
19,138.580 LINK
0.1321%
57
Bitbegin
LINK-USDT$20.50
0.0061379 Eth
$387,889.00
19,321.750 LINK
0.1333%
58
Slex
LINK-ETH$20.49
0.0061326 Eth
$350,521.00
17,477.310 LINK
0.1206%
59
QMall
LINK-USDC$20.51
0.0061451 Eth
$344,207.00
17,193.899 LINK
0.1186%
60
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$20.49
0.0061350 Eth
$341,016.00
16,980.083 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1172%
61
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$20.52
0.0061442 Eth
$327,501.00
16,217.042 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1119%
62
Coinbase Exchange
LINK-BTC$20.51
0.0061421 Eth
$311,230.00
15,173.450 LINK
0.1047%
63
BitMart
LINK-BTC$20.48
0.0061350 Eth
$280,106.00
13,676.500 LINK
0.0944%
64
WhiteBIT
LINK-EUR$20.43
0.0061210 Eth
$278,624.00
13,635.330 LINK
0.0941%
65
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$20.45
0.0061243 Eth
$274,312.00
269,981.036 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.8630%
66
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$20.46
0.0061233 Eth
$274,029.00
13,456.432 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0929%
67
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.56
0.0061535 Eth
$261,629.00
13,006.846 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0898%
68
BitDelta
LINK-USDT$20.49
0.0061317 Eth
$205,623.00
10,242.000 LINK
0.0707%
69
Coinbase Exchange
LINK-ETH$20.55
0.0061501 Eth
$187,328.00
9,116.570 LINK
0.0629%
70
Coinbase Exchange
LINK-GBP$20.44
0.0061192 Eth
$183,416.00
8,974.050 LINK
0.0619%
71
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$20.52
0.0061428 Eth
$124,381.00
6,170.299 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0426%
72
BitMart
LINK-ETH$20.50
0.0061357 Eth
$120,316.00
5,870.080 LINK
0.0405%
73
OKX
LINK-USDC$20.47
0.0061286 Eth
$104,719.00
5,214.797 LINK
0.0360%
74
BitStorage
LINK-ETH$20.47
0.0061295 Eth
$104,600.00
5,109.100 LINK
0.0353%
75
LATOKEN
LINK-BTC$20.53
0.0061393 Eth
$102,327.00
4,983.169 LINK
0.0344%
76
Hotcoin
LINK-BTC$20.51
0.0061424 Eth
$95,532.00
4,657.260 LINK
0.0321%
77
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$20.45
0.0061234 Eth
$94,003.00
4,674.262 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0323%
78
BYDFi
LINK-USDC$20.49
0.0061364 Eth
$90,530.00
4,419.270 LINK
0.0305%
79
Kraken
LINK-GBP$20.39
0.0061049 Eth
$82,437.00
4,043.566 LINK
0.0279%
80
Binance US
LINK-USDT$20.48
0.0061316 Eth
$81,897.00
3,998.353 LINK
0.0276%
81
Bitkub
LINK-THB$20.38
0.0061029 Eth
$79,484.00
3,899.958 LINK
0.0269%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$20.45
0.0061234 Eth
$76,402.00
3,758.110 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0259%
83
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$20.53
0.0061439 Eth
$72,049.00
3,566.372 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0246%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$20.48
0.0061337 Eth
$70,410.00
3,510.152 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0242%
85
EXMO
LINK-BTC$20.50
0.0061403 Eth
$62,045.00
3,025.866 LINK
0.0209%
86
Bitso
LINK-USD$20.48
0.0061254 Eth
$54,808.00
2,676.473 LINK
0.0185%
87
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$20.50
0.0061394 Eth
$51,075.00
2,509.607 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0173%
88
Mercado Bitcoin
LINK-BRL$20.66
0.0061862 Eth
$47,208.00
2,284.725 LINK
0.0158%
89
Hotcoin
LINK-ETH$20.47
0.0061254 Eth
$34,212.00
1,671.460 LINK
0.0115%
90
zondacrypto
LINK-PLN$20.30
0.0060768 Eth
$34,026.00
1,676.406 LINK
0.0116%
91
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$20.34
0.0060919 Eth
$32,634.00
2,408.869 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0166%
92
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$20.43
0.0061195 Eth
$27,322.00
1,354.372 0X5947BB275C521040051D82396192181B413227A3
0.0093%
93
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$20.32
0.0060841 Eth
$26,998.00
1,345.677 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0093%
94
CoinEx
LINK-USDC$20.42
0.0061158 Eth
$21,567.00
1,073.181 LINK
0.0074%
95
zondacrypto
LINK-USDC$20.52
0.0061374 Eth
$19,356.34
943.394 LINK
0.0065%
96
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$20.39
0.0061070 Eth
$16,782.60
16,615.594 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1147%
97
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$20.50
0.0061415 Eth
$15,595.31
760.992 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0053%
98
Dex-Trade
LINK-ETH$20.48
0.0061306 Eth
$13,952.36
681.120 LINK
0.0047%
99
Bitexen
LINK-TRY$20.42
0.0060996 Eth
$7,040.32
344.855 LINK
0.0024%
100
Ace
LINK-USDT$20.45
0.0061206 Eth
$3,326.16
165.410 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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