ETH Price: $3,223.56 (-3.64%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

725,405 ( -0.267%)

Market

Price

$19.77 @ 0.006133 ETH (-3.82%)

Onchain Market Cap

$19,770,000,000.00

Circulating Supply Market Cap

$12,486,427,912.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
arderlike.eth
Balance
0.28685325274207336 LINK

Value
$5.67 ( ~0.0017589238579112 Eth) [0.0000%]
0xed92400C084E2eDB4472Dcfe6A2aAD91aD361552
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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 17872.73% |ETH 0.0003846 1494.64%

Market

Volume (24H):$902,565,029.00
Market Capitalization:$12,486,427,912.00
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$19.80
0.0061401 Eth
$42,573,784.00
2,149,756.840 LINK
10.6063%
2
Bitget
LINK-USDT$19.80
0.0061355 Eth
$23,562,482.00
1,185,360.663 LINK
5.8483%
3
MEXC
LINK-USDT$19.77
0.0061298 Eth
$22,451,968.00
1,135,606.170 LINK
5.6028%
4
P2B
LINK-USDT$19.81
0.0061422 Eth
$21,832,362.00
1,101,857.220 LINK
5.4363%
5
Slex
LINK-USDT$19.78
0.0061293 Eth
$19,906,115.00
999,026.510 LINK
4.9289%
6
Bybit
LINK-USDT$19.78
0.0061300 Eth
$18,691,386.00
940,653.560 LINK
4.6409%
7
Gate.io
LINK-USDT$19.79
0.0061330 Eth
$14,702,003.00
742,094.100 LINK
3.6613%
8
DigiFinex
LINK-USDT$19.79
0.0061319 Eth
$13,300,135.00
672,113.260 LINK
3.3160%
9
OKX
LINK-USDT$19.78
0.0061278 Eth
$13,075,352.00
658,578.912 LINK
3.2493%
10
HTX
LINK-USDT$19.80
0.0061368 Eth
$11,969,342.00
600,996.060 LINK
2.9652%
11
XT.COM
LINK-USDT$19.82
0.0061399 Eth
$10,929,479.00
550,241.770 LINK
2.7147%
12
FameEX
LINK-USDT$19.78
0.0061299 Eth
$10,874,213.00
547,450.843 LINK
2.7010%
13
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.80
0.0061355 Eth
$10,701,253.00
547,313.802 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.7003%
14
Azbit
LINK-USDT$19.76
0.0061253 Eth
$10,559,153.00
531,019.881 LINK
2.6199%
15
Coinstore
LINK-USDT$19.76
0.0061209 Eth
$9,390,472.00
472,835.140 LINK
2.3328%
16
Biconomy.com
LINK-USDT$19.81
0.0061389 Eth
$9,344,857.00
464,254.580 LINK
2.2905%
17
CoinW
LINK-USDT$19.82
0.0061413 Eth
$8,369,125.00
422,263.790 LINK
2.0833%
18
Bitunix
LINK-USDT$19.78
0.0061314 Eth
$8,156,373.00
412,335.562 LINK
2.0344%
19
Binance
LINK-FDUSD$19.71
0.0061110 Eth
$7,306,757.00
367,600.800 LINK
1.8136%
20
Hotcoin
LINK-USDT$19.78
0.0061332 Eth
$7,050,820.00
356,472.270 LINK
1.7587%
21
KuCoin
LINK-USDT$19.79
0.0061329 Eth
$6,487,721.00
327,799.554 LINK
1.6173%
22
BYDFi
LINK-USDT$19.81
0.0061376 Eth
$6,070,603.00
306,483.600 LINK
1.5121%
23
LATOKEN
LINK-USDT$19.81
0.0061373 Eth
$5,426,516.00
273,981.874 LINK
1.3518%
24
LBank
LINK-USDT$19.78
0.0061296 Eth
$5,345,990.00
270,225.650 LINK
1.3332%
25
QMall
LINK-USDT$19.78
0.0061302 Eth
$4,305,180.00
216,988.377 LINK
1.0706%
26
BTSE
LINK-USDT$19.80
0.0061339 Eth
$3,961,201.00
200,102.228 LINK
0.9873%
27
Kraken
LINK-USD$19.78
0.0061297 Eth
$3,838,871.00
194,063.514 LINK
0.9575%
28
Dex-Trade
LINK-USDT$19.80
0.0061375 Eth
$3,517,896.00
177,680.730 LINK
0.8766%
29
FMCPAY
LINK-USDT$19.79
0.0061324 Eth
$2,716,387.00
136,750.917 LINK
0.6747%
30
ProBit Global
LINK-USDT$19.79
0.0061365 Eth
$2,420,979.00
122,331.332 LINK
0.6036%
31
Dcoin
LINK-USDT$19.76
0.0061254 Eth
$2,299,475.00
116,373.000 LINK
0.5742%
32
Bitvavo
LINK-EUR$19.74
0.0061181 Eth
$2,263,686.00
114,651.422 LINK
0.5657%
33
EXMO
LINK-USDT$19.77
0.0061230 Eth
$2,058,546.00
104,136.383 LINK
0.5138%
34
CoinEx
LINK-USDT$19.80
0.0061328 Eth
$1,885,126.00
95,059.724 LINK
0.4690%
35
PointPay
LINK-USDT$19.72
0.0061252 Eth
$1,612,870.00
81,083.902 LINK
0.4000%
36
Coinbase Exchange
LINK-EUR$19.79
0.0061309 Eth
$1,439,346.00
72,727.420 LINK
0.3588%
37
BigONE
LINK-USDT$19.71
0.0061062 Eth
$1,400,178.00
71,025.380 LINK
0.3504%
38
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.70
0.0061033 Eth
$1,355,116.00
69,537.505 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3431%
39
Phemex
LINK-USDT$19.81
0.0061376 Eth
$1,271,852.00
64,211.380 LINK
0.3168%
40
Kraken
LINK-EUR$19.81
0.0061394 Eth
$1,261,557.00
63,674.022 LINK
0.3142%
41
FMCPAY
LINK-ETH$19.78
0.0061284 Eth
$1,171,138.00
59,787.520 LINK
0.2950%
42
FMCPAY
LINK-BTC$19.77
0.0061276 Eth
$1,166,250.00
58,920.900 LINK
0.2907%
43
tanX
LINK-USDC$19.79
0.0061319 Eth
$971,219.00
48,807.180 LINK
0.2408%
44
BitStorage
LINK-USDT$19.78
0.0061313 Eth
$886,264.00
44,808.390 LINK
0.2211%
45
Coinbase Exchange
LINK-ETH$19.75
0.0061191 Eth
$795,836.00
40,299.520 LINK
0.1988%
46
Gemini
LINK-USD$19.81
0.0061398 Eth
$785,620.00
39,649.456 LINK
0.1956%
47
Coinbase Exchange
LINK-GBP$19.80
0.0061350 Eth
$781,755.00
39,474.340 LINK
0.1948%
48
Coinbase Exchange
LINK-BTC$19.78
0.0061326 Eth
$724,481.00
36,627.280 LINK
0.1807%
49
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$19.82
0.0061385 Eth
$685,826.00
34,424.684 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1698%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.81
0.0061373 Eth
$670,364.00
34,033.384 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1679%
51
ProBit Global
LINK-BTC$19.79
0.0061310 Eth
$651,945.00
32,950.101 LINK
0.1626%
52
Bitbank
LINK-JPY$19.80
0.0061399 Eth
$625,593.00
31,588.675 LINK
0.1559%
53
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.80
0.0061352 Eth
$604,074.00
606,426.206 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.9919%
54
EarnBIT
LINK-USDT$19.78
0.0061302 Eth
$594,017.00
29,947.559 LINK
0.1478%
55
itBit
LINK-USD$19.81
0.0061409 Eth
$579,092.00
29,232.308 LINK
0.1442%
56
GMO Japan
LINK-JPY$19.78
0.0061286 Eth
$577,028.00
29,175.100 LINK
0.1439%
57
Bybit
LINK-USDC$19.80
0.0061349 Eth
$573,904.00
29,004.659 LINK
0.1431%
58
Koinpark
LINK-USDT$19.76
0.0061241 Eth
$559,235.00
28,301.996 LINK
0.1396%
59
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$19.81
0.0061373 Eth
$558,526.00
560,315.108 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.7644%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.81
0.0061373 Eth
$535,498.00
27,371.965 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1350%
61
Bitbegin
LINK-USDT$19.78
0.0061280 Eth
$513,235.00
25,781.378 LINK
0.1272%
62
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.81
0.0061372 Eth
$491,411.00
25,089.491 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1238%
63
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.77
0.0061226 Eth
$460,842.00
23,401.853 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1155%
64
OKX
LINK-USDC$19.78
0.0061289 Eth
$455,782.00
22,992.694 LINK
0.1134%
65
Coinbase Exchange
LINK-USDT$19.78
0.0061313 Eth
$390,870.00
19,761.869 LINK
0.0975%
66
Binance
LINK-TRY$19.78
0.0061328 Eth
$379,997.00
19,165.440 LINK
0.0946%
67
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$19.82
0.0061376 Eth
$301,992.00
15,429.127 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0761%
68
BitDelta
LINK-USDT$19.79
0.0061324 Eth
$283,979.00
14,303.000 LINK
0.0706%
69
Hotcoin
LINK-BTC$19.77
0.0061306 Eth
$272,280.00
13,771.770 LINK
0.0679%
70
BitMart
LINK-BTC$19.81
0.0061367 Eth
$271,888.00
13,725.100 LINK
0.0677%
71
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.89
0.0061629 Eth
$245,983.00
19,079.162 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0941%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$19.80
0.0061353 Eth
$219,411.00
11,211.802 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0553%
73
Bitci TR
LINK-TRY$19.63
0.0060964 Eth
$198,539.00
9,940.050 LINK
0.0490%
74
LATOKEN
LINK-BTC$19.76
0.0061275 Eth
$197,829.00
10,009.381 LINK
0.0494%
75
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$19.75
0.0061187 Eth
$184,131.00
9,440.800 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0466%
76
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$19.77
0.0061301 Eth
$173,191.00
8,720.002 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0430%
77
Bitkub
LINK-THB$19.82
0.0061449 Eth
$166,811.00
8,415.093 LINK
0.0415%
78
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$19.70
0.0061034 Eth
$166,468.00
8,465.816 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0418%
79
Slex
LINK-ETH$19.76
0.0061264 Eth
$161,153.00
8,245.340 LINK
0.0407%
80
PointPay
LINK-BTC$19.70
0.0061161 Eth
$156,519.00
7,931.287 LINK
0.0391%
81
BitStorage
LINK-ETH$19.77
0.0061274 Eth
$140,981.00
7,129.570 LINK
0.0352%
82
Binance
LINK-BRL$19.86
0.0061568 Eth
$136,922.00
6,794.440 LINK
0.0335%
83
Binance US
LINK-USDT$19.81
0.0061351 Eth
$134,335.00
6,780.483 LINK
0.0335%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$19.84
0.0061451 Eth
$121,478.00
122,167.615 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6027%
85
BTCMarkets
LINK-AUD$19.82
0.0061440 Eth
$113,951.00
5,749.946 LINK
0.0284%
86
KuCoin
LINK-USDC$19.78
0.0061286 Eth
$112,473.00
5,686.750 LINK
0.0281%
87
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$19.75
0.0061179 Eth
$103,688.00
5,199.669 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0257%
88
BitMart
LINK-ETH$19.80
0.0061347 Eth
$101,339.00
5,117.380 LINK
0.0252%
89
Hotcoin
LINK-ETH$19.76
0.0061282 Eth
$94,595.00
4,786.430 LINK
0.0236%
90
Kraken
LINK-GBP$19.75
0.0061192 Eth
$94,211.00
4,770.788 LINK
0.0235%
91
Bitso
LINK-USD$19.78
0.0061302 Eth
$84,726.00
4,284.426 LINK
0.0211%
92
CoinEx
LINK-USDC$19.82
0.0061421 Eth
$58,746.00
2,948.354 LINK
0.0145%
93
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$19.76
0.0061241 Eth
$54,220.00
2,746.324 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0135%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$19.84
0.0061479 Eth
$42,224.00
2,146.766 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0106%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$19.76
0.0061247 Eth
$41,332.00
2,207.967 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0109%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$19.80
0.0061345 Eth
$38,660.00
1,951.804 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0096%
97
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$19.81
0.0061366 Eth
$28,791.00
2,227.185 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0110%
98
HTX
LINK-BTC$19.75
0.0061209 Eth
$22,199.00
1,124.526 LINK
0.0055%
99
Dex-Trade
LINK-ETH$19.77
0.0061295 Eth
$20,240.00
1,023.590 LINK
0.0051%
100
Bitexen
LINK-TRY$19.70
0.0061093 Eth
$19,986.13
1,014.524 LINK
0.0050%

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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