ETH Price: $2,917.03 (+3.31%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,703 ( -0.002%)

Market

Price

$12.93 @ 0.004433 ETH (+4.86%)

Onchain Market Cap

$12,930,000,000.00

Circulating Supply Market Cap

$8,105,540,464.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x6c6b03bc32e3e2aea684b7be35750cbb0b32e40c
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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 11654.55% |ETH 0.0003846 1052.63%

Market

Volume (24H):$554,189,086.00
Market Capitalization:$8,105,540,464.00
Circulating Supply:626,849,971.00 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
WhiteBIT
LINK-USDT$12.96
0.0044426 Eth
$46,767,348.00
3,608,312.520 LINK
15.0593%
2
Binance
LINK-USDT$12.99
0.0044528 Eth
$43,323,379.00
3,443,659.590 LINK
14.3721%
3
Coinbase Exchange
LINK-USD$12.95
0.0044396 Eth
$23,400,684.00
1,806,723.610 LINK
7.5404%
4
HTX
LINK-USDT$12.96
0.0044431 Eth
$13,363,041.00
1,064,579.393 LINK
4.4430%
5
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.96
0.0044425 Eth
$12,109,974.00
949,530.395 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.9629%
6
MEXC
LINK-USDT$12.89
0.0044188 Eth
$11,273,947.00
874,858.640 LINK
3.6512%
7
BTSE
LINK-USDT$12.92
0.0044316 Eth
$9,590,423.00
742,401.092 LINK
3.0984%
8
Bitget
LINK-USDT$12.97
0.0044440 Eth
$9,436,155.00
751,519.274 LINK
3.1365%
9
P2B
LINK-USDT$12.97
0.0044437 Eth
$9,125,822.00
703,839.590 LINK
2.9375%
10
Bybit
LINK-USDT$12.98
0.0044492 Eth
$8,091,290.00
644,239.255 LINK
2.6887%
11
Gate.io
LINK-USDT$12.97
0.0044446 Eth
$7,597,003.00
604,477.100 LINK
2.5228%
12
Slex
LINK-USDT$12.95
0.0044369 Eth
$7,443,057.00
592,304.140 LINK
2.4720%
13
Hotcoin
LINK-USDT$12.94
0.0044391 Eth
$6,564,233.00
507,228.680 LINK
2.1169%
14
OKX
LINK-USDT$12.97
0.0044454 Eth
$5,992,500.00
475,663.881 LINK
1.9852%
15
Bitunix
LINK-USDT$12.93
0.0044352 Eth
$5,628,662.00
435,237.130 LINK
1.8165%
16
DigiFinex
LINK-USDT$12.99
0.0044507 Eth
$5,625,012.00
433,104.050 LINK
1.8076%
17
Ourbit
LINK-USDT$12.94
0.0044380 Eth
$4,821,436.00
383,544.850 LINK
1.6007%
18
Azbit
LINK-USDT$12.93
0.0044308 Eth
$4,771,030.00
381,494.780 LINK
1.5922%
19
Upbit
LINK-KRW$12.90
0.0044217 Eth
$4,745,554.00
367,829.374 LINK
1.5351%
20
CoinW
LINK-USDT$12.98
0.0044474 Eth
$4,339,224.00
334,423.160 LINK
1.3957%
21
XT.COM
LINK-USDT$12.96
0.0044440 Eth
$4,317,938.00
343,264.700 LINK
1.4326%
22
Biconomy.com
LINK-USDT$12.96
0.0044415 Eth
$3,940,466.00
313,499.640 LINK
1.3084%
23
Binance
LINK-FDUSD$12.91
0.0044273 Eth
$3,605,042.00
285,840.220 LINK
1.1930%
24
Coinstore
LINK-USDT$12.91
0.0044310 Eth
$3,097,595.00
246,263.580 LINK
1.0278%
25
KuCoin
LINK-USDT$12.96
0.0044429 Eth
$2,510,721.00
193,729.594 LINK
0.8085%
26
ProBit Global
LINK-USDT$12.95
0.0044375 Eth
$2,439,847.00
188,455.713 LINK
0.7865%
27
LBank
LINK-USDT$12.95
0.0044399 Eth
$2,426,584.00
187,336.660 LINK
0.7818%
28
BYDFi
LINK-USDT$12.91
0.0044276 Eth
$2,186,494.00
169,331.010 LINK
0.7067%
29
LATOKEN
LINK-USDT$12.96
0.0044440 Eth
$2,084,287.00
160,785.815 LINK
0.6710%
30
WhiteBIT
LINK-BTC$12.95
0.0044382 Eth
$1,919,237.00
148,226.470 LINK
0.6186%
31
Trubit
LINK-USDT$12.93
0.0044384 Eth
$1,839,832.00
146,507.200 LINK
0.6114%
32
AscendEX (BitMax)
LINK-USDT$12.90
0.0044201 Eth
$1,802,724.00
139,771.100 LINK
0.5833%
33
Bitvavo
LINK-EUR$12.94
0.0044363 Eth
$1,538,998.00
118,907.602 LINK
0.4963%
34
Dex-Trade
LINK-USDT$12.95
0.0044374 Eth
$1,482,395.00
114,507.040 LINK
0.4779%
35
Binance
LINK-USDC$12.97
0.0044439 Eth
$1,478,462.00
117,736.460 LINK
0.4914%
36
Bithumb
LINK-KRW$12.88
0.0044154 Eth
$1,300,915.00
101,003.577 LINK
0.4215%
37
HashKey Global
LINK-USDT$12.98
0.0044489 Eth
$1,102,337.00
88,070.750 LINK
0.3676%
38
Azbit
LINK-ETH$12.90
0.0044228 Eth
$949,774.00
74,559.772 LINK
0.3112%
39
CoinEx
LINK-USDT$12.95
0.0044394 Eth
$890,695.00
70,723.133 LINK
0.2952%
40
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.97
0.0044459 Eth
$873,055.00
68,266.587 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2849%
41
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.94
0.0044354 Eth
$866,384.00
67,991.860 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2838%
42
BigONE
LINK-USDT$12.96
0.0044433 Eth
$833,025.00
64,271.540 LINK
0.2682%
43
tanX
LINK-USDC$12.90
0.0044195 Eth
$725,099.00
57,771.130 LINK
0.2411%
44
WhiteBIT
LINK-TRY$12.94
0.0044370 Eth
$722,515.00
55,815.940 LINK
0.2329%
45
AscendEX (BitMax)
LINK-BTC$12.98
0.0044487 Eth
$672,137.00
51,777.700 LINK
0.2161%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.89
0.0044178 Eth
$610,843.00
47,793.155 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1995%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.97
0.0044450 Eth
$543,800.00
42,800.941 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1786%
48
itBit
LINK-USD$12.95
0.0044389 Eth
$496,698.00
38,355.062 LINK
0.1601%
49
ProBit Global
LINK-BTC$12.96
0.0044433 Eth
$483,339.00
37,291.811 LINK
0.1556%
50
PointPay
LINK-USDT$12.97
0.0044437 Eth
$481,119.00
38,236.831 LINK
0.1596%
51
Phemex
LINK-USDT$12.92
0.0044282 Eth
$467,632.00
36,190.080 LINK
0.1510%
52
LATOKEN
LINK-BTC$12.98
0.0044482 Eth
$401,911.00
30,966.497 LINK
0.1292%
53
KickEX
LINK-USDT$12.97
0.0044464 Eth
$393,322.00
30,321.025 LINK
0.1265%
54
EXMO
LINK-USDT$12.97
0.0044460 Eth
$376,864.00
29,058.535 LINK
0.1213%
55
Coinbase Exchange
LINK-EUR$12.96
0.0044439 Eth
$370,631.00
28,597.890 LINK
0.1194%
56
WhiteBIT
LINK-EUR$12.94
0.0044352 Eth
$360,233.00
27,835.010 LINK
0.1162%
57
Bitbank
LINK-JPY$13.00
0.0044562 Eth
$287,005.00
22,076.518 LINK
0.0921%
58
Bybit
LINK-USDC$12.98
0.0044478 Eth
$286,601.00
22,781.255 LINK
0.0951%
59
Binance
LINK-EUR$12.96
0.0044422 Eth
$285,646.00
22,714.750 LINK
0.0948%
60
EarnBIT
LINK-USDT$12.94
0.0044381 Eth
$283,225.00
22,465.135 LINK
0.0938%
61
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.97
0.0044434 Eth
$261,855.00
20,734.933 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0865%
62
BYDFi
LINK-USDC$12.91
0.0044295 Eth
$248,128.00
19,214.170 LINK
0.0802%
63
BitMart
LINK-BTC$12.97
0.0044440 Eth
$216,858.00
16,723.240 LINK
0.0698%
64
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$12.97
0.0044456 Eth
$215,849.00
17,146.144 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0716%
65
Slex
LINK-ETH$12.96
0.0044406 Eth
$215,811.00
16,933.070 LINK
0.0707%
66
Gemini
LINK-USD$12.95
0.0044383 Eth
$214,585.00
16,570.264 LINK
0.0692%
67
Coinbase Exchange
LINK-GBP$12.95
0.0044397 Eth
$207,090.00
15,994.260 LINK
0.0668%
68
GMO Japan
LINK-JPY$12.95
0.0044435 Eth
$183,242.00
14,147.100 LINK
0.0590%
69
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.96
0.0044420 Eth
$181,733.00
176,411.881 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.7363%
70
BitDelta
LINK-USDT$12.96
0.0044425 Eth
$177,839.00
14,188.000 LINK
0.0592%
71
Binance
LINK-TRY$12.94
0.0044358 Eth
$156,235.00
12,475.750 LINK
0.0521%
72
Bitkub
LINK-THB$12.96
0.0044451 Eth
$155,297.00
11,986.840 LINK
0.0500%
73
OKX
LINK-USDC$12.96
0.0044422 Eth
$152,562.00
12,164.041 LINK
0.0508%
74
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.94
0.0044345 Eth
$137,573.00
10,773.422 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0450%
75
Bitci TR
LINK-TRY$12.98
0.0044490 Eth
$128,228.00
10,227.520 LINK
0.0427%
76
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.92
0.0044303 Eth
$122,003.00
9,693.734 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0405%
77
Slex
LINK-BTC$12.96
0.0044401 Eth
$116,315.00
9,195.100 LINK
0.0384%
78
Coinbase Exchange
LINK-ETH$12.96
0.0044417 Eth
$105,271.00
8,123.810 LINK
0.0339%
79
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.94
0.0044351 Eth
$90,759.00
87,042.563 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3633%
80
PointPay
LINK-BTC$12.96
0.0044404 Eth
$80,752.00
6,384.710 LINK
0.0266%
81
Bitso
LINK-USD$12.92
0.0044273 Eth
$80,204.00
6,209.844 LINK
0.0259%
82
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.93
0.0044325 Eth
$78,781.00
6,310.424 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0263%
83
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.95
0.0044416 Eth
$73,369.00
5,824.064 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0243%
84
Coinbase Exchange
LINK-BTC$12.98
0.0044485 Eth
$66,622.00
5,132.500 LINK
0.0214%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.94
0.0044354 Eth
$60,364.00
58,803.918 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2454%
86
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$12.94
0.0044358 Eth
$59,676.00
4,743.788 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0198%
87
Kanga
LINK-PLN$12.99
0.0044513 Eth
$56,988.00
0.000 LINK
0.0000%
88
Mercado Bitcoin
LINK-BRL$12.93
0.0044303 Eth
$55,246.00
4,274.012 LINK
0.0178%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.94
0.0044366 Eth
$52,377.00
4,101.786 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0171%
90
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.92
0.0044276 Eth
$51,274.00
4,062.107 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0170%
91
Uniswap V3 (Ethereum)
0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23-0X514910771AF9CA656AF840DFF83E8264ECF986CA$12.94
0.0044334 Eth
$46,194.00
141,453.663 0XA95C5EBB86E0DE73B4FB8C47A45B792CFEA28C23
0.5904%
92
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$12.85
0.0044057 Eth
$44,436.00
3,497.305 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0146%
93
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.91
0.0044258 Eth
$39,182.00
38,045.046 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1588%
94
KuCoin
LINK-USDC$12.94
0.0044363 Eth
$35,427.00
2,737.602 LINK
0.0114%
95
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.89
0.0044180 Eth
$32,332.00
2,534.578 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0106%
96
Binance US
LINK-USDT$12.96
0.0044409 Eth
$28,553.00
2,203.876 LINK
0.0092%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.96
0.0044419 Eth
$26,768.00
2,101.824 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0088%
98
Coinone
LINK-KRW$12.84
0.0044019 Eth
$24,890.00
1,937.869 LINK
0.0081%
99
Independent Reserve
LINK-AUD$12.85
0.0044203 Eth
$24,583.00
1,913.150 LINK
0.0080%
100
KuCoin
LINK-BTC$12.95
0.0044406 Eth
$23,426.00
1,808.513 LINK
0.0075%

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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