ETH Price: $3,243.73 (-1.26%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,207 ( 0.023%)

Market

Price

$25.54 @ 0.007874 ETH (+0.44%)

Onchain Market Cap

$25,540,000,000.00

Circulating Supply Market Cap

$16,239,152,528.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
185.40767525 LINK

Value
$4,735.31 ( ~1.4598 Eth) [0.0000%]
0x5a97b32e8c79ffb4b911545fe09a704e230f76b7
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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 23118.18% |ETH 0.0003846 1947.32%

Market

Volume (24H):$1,042,097,244.00
Market Capitalization:$16,239,152,528.00
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$25.43
0.0078600 Eth
$142,187,473.00
5,658,360.800 LINK
18.2819%
2
WhiteBIT
LINK-USDT$25.35
0.0078330 Eth
$127,722,826.00
5,037,821.210 LINK
16.2770%
3
Coinbase Exchange
LINK-USD$25.39
0.0078348 Eth
$65,153,193.00
2,566,500.950 LINK
8.2923%
4
Bybit
LINK-USDT$25.39
0.0078480 Eth
$45,510,295.00
1,820,626.177 LINK
5.8824%
5
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.40
0.0078517 Eth
$27,412,655.00
1,116,022.060 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.6058%
6
P2B
LINK-USDT$25.38
0.0078470 Eth
$25,121,864.00
989,688.350 LINK
3.1976%
7
OKX
LINK-USDT$25.43
0.0078615 Eth
$22,083,608.00
878,389.906 LINK
2.8380%
8
DigiFinex
LINK-USDT$25.44
0.0078643 Eth
$18,615,383.00
731,704.560 LINK
2.3641%
9
Gate.io
LINK-USDT$25.41
0.0078550 Eth
$16,804,122.00
668,885.180 LINK
2.1611%
10
HTX
LINK-USDT$25.41
0.0078556 Eth
$16,268,112.00
652,062.121 LINK
2.1068%
11
XT.COM
LINK-USDT$25.39
0.0078435 Eth
$14,224,635.00
566,038.590 LINK
1.8288%
12
Azbit
LINK-USDT$25.49
0.0078642 Eth
$14,038,914.00
558,848.955 LINK
1.8056%
13
Binance
LINK-USDC$25.43
0.0078622 Eth
$13,833,891.00
550,951.980 LINK
1.7801%
14
MEXC
LINK-USDT$25.39
0.0078474 Eth
$12,871,882.00
506,880.340 LINK
1.6377%
15
Coinstore
LINK-USDT$25.43
0.0078460 Eth
$11,961,102.00
477,031.380 LINK
1.5413%
16
Bitunix
LINK-USDT$25.42
0.0078473 Eth
$11,215,727.00
441,348.820 LINK
1.4260%
17
Hotcoin
LINK-USDT$25.42
0.0078594 Eth
$10,109,682.00
397,649.490 LINK
1.2848%
18
KuCoin
LINK-USDT$25.41
0.0078546 Eth
$9,928,072.00
390,741.223 LINK
1.2625%
19
CoinW
LINK-USDT$25.44
0.0078528 Eth
$9,843,371.00
386,861.040 LINK
1.2499%
20
Kraken
LINK-USD$25.41
0.0078461 Eth
$9,363,764.00
368,512.415 LINK
1.1906%
21
Binance
LINK-FDUSD$25.30
0.0078213 Eth
$9,094,159.00
364,517.810 LINK
1.1777%
22
BYDFi
LINK-USDT$25.72
0.0078916 Eth
$7,900,680.00
307,218.570 LINK
0.9926%
23
LBank
LINK-USDT$25.46
0.0078656 Eth
$7,004,501.00
275,156.720 LINK
0.8890%
24
LATOKEN
LINK-USDT$25.46
0.0078746 Eth
$6,495,187.00
255,152.998 LINK
0.8244%
25
Coinbase Exchange
LINK-GBP$25.46
0.0078667 Eth
$6,306,037.00
247,682.910 LINK
0.8003%
26
Coinbase Exchange
LINK-EUR$25.48
0.0078715 Eth
$5,786,707.00
227,147.300 LINK
0.7339%
27
QMall
LINK-USDT$25.41
0.0078395 Eth
$5,767,924.00
229,664.970 LINK
0.7420%
28
FMCPAY
LINK-USDT$25.42
0.0078571 Eth
$4,397,123.00
176,637.446 LINK
0.5707%
29
WhiteBIT
LINK-BTC$25.41
0.0078506 Eth
$4,294,696.00
169,017.450 LINK
0.5461%
30
Dex-Trade
LINK-USDT$25.47
0.0078742 Eth
$4,146,217.00
162,809.614 LINK
0.5260%
31
Bitvavo
LINK-EUR$25.41
0.0078538 Eth
$3,739,641.00
147,166.245 LINK
0.4755%
32
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$25.44
0.0078476 Eth
$3,371,731.00
134,680.360 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4351%
33
Bitstamp
LINK-USD$25.42
0.0078578 Eth
$3,281,257.00
129,081.690 LINK
0.4171%
34
WhiteBIT
LINK-TRY$25.42
0.0078525 Eth
$3,120,318.00
122,770.430 LINK
0.3967%
35
Biconomy.com
LINK-USDT$25.39
0.0078498 Eth
$2,851,632.00
113,663.530 LINK
0.3672%
36
PointPay
LINK-USDT$25.51
0.0078710 Eth
$2,173,745.00
86,363.107 LINK
0.2790%
37
CoinEx
LINK-USDT$25.47
0.0078705 Eth
$2,133,577.00
85,678.455 LINK
0.2768%
38
FMCPAY
LINK-BTC$25.42
0.0078577 Eth
$1,723,023.00
68,161.000 LINK
0.2202%
39
Bitbank
LINK-JPY$25.47
0.0078665 Eth
$1,722,532.00
67,622.454 LINK
0.2185%
40
BigONE
LINK-USDT$25.43
0.0078635 Eth
$1,692,839.00
66,559.280 LINK
0.2151%
41
Gemini
LINK-USD$25.45
0.0078671 Eth
$1,662,406.00
65,320.159 LINK
0.2110%
42
ProBit Global
LINK-USDT$25.37
0.0078405 Eth
$1,661,898.00
65,500.961 LINK
0.2116%
43
EXMO
LINK-USDT$25.43
0.0078619 Eth
$1,414,248.00
55,609.213 LINK
0.1797%
44
Kraken
LINK-USDT$25.44
0.0078562 Eth
$1,198,801.00
47,118.259 LINK
0.1522%
45
Bybit
LINK-USDC$25.40
0.0078527 Eth
$1,169,084.00
46,624.487 LINK
0.1506%
46
tanX
LINK-USDC$25.39
0.0078490 Eth
$1,079,122.00
43,352.040 LINK
0.1401%
47
QMall
LINK-USDC$25.47
0.0078643 Eth
$1,064,691.00
42,457.080 LINK
0.1372%
48
EarnBIT
LINK-USDT$25.50
0.0078743 Eth
$1,055,166.00
41,945.008 LINK
0.1355%
49
Trubit
LINK-USDT$25.40
0.0078370 Eth
$1,050,642.00
41,975.050 LINK
0.1356%
50
BitStorage
LINK-USDT$25.71
0.0079030 Eth
$1,039,095.00
40,410.020 LINK
0.1306%
51
WhiteBIT
LINK-EUR$25.45
0.0078587 Eth
$947,972.00
37,252.140 LINK
0.1204%
52
Binance
LINK-TRY$25.50
0.0078747 Eth
$928,164.00
36,781.600 LINK
0.1188%
53
Coinbase Exchange
LINK-USDT$25.46
0.0078612 Eth
$909,003.00
35,699.866 LINK
0.1153%
54
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$25.44
0.0078476 Eth
$907,664.00
36,137.687 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1168%
55
Binance
LINK-EUR$25.45
0.0078685 Eth
$900,233.00
35,826.290 LINK
0.1158%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$25.49
0.0078647 Eth
$893,155.00
35,817.199 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1157%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.39
0.0078323 Eth
$828,984.00
33,195.607 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1073%
58
itBit
LINK-USD$25.48
0.0078768 Eth
$790,363.00
31,018.965 LINK
0.1002%
59
GMO Japan
LINK-JPY$25.45
0.0078544 Eth
$774,996.00
30,452.600 LINK
0.0984%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.41
0.0078401 Eth
$758,412.00
30,452.260 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0984%
61
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.41
0.0078435 Eth
$744,399.00
734,361.362 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3727%
62
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.37
0.0078340 Eth
$723,822.00
28,823.314 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0931%
63
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$25.40
0.0078506 Eth
$720,044.00
55,578.646 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1796%
64
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$25.53
0.0078758 Eth
$645,294.00
25,649.101 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0829%
65
HashKey Exchange
LINK-USD$25.77
0.0079092 Eth
$615,615.00
24,551.551 LINK
0.0793%
66
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$25.39
0.0078323 Eth
$539,581.00
532,344.535 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7200%
67
Slex
LINK-ETH$25.44
0.0078598 Eth
$429,133.00
17,209.260 LINK
0.0556%
68
LATOKEN
LINK-BTC$25.49
0.0078630 Eth
$427,923.00
16,790.889 LINK
0.0543%
69
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.30
0.0078104 Eth
$420,281.00
16,780.212 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0542%
70
XT.COM
LINK-ETH$25.46
0.0078571 Eth
$413,433.00
16,533.750 LINK
0.0534%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$25.42
0.0078429 Eth
$400,992.00
16,036.294 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0518%
72
Coinbase Exchange
LINK-BTC$25.44
0.0078490 Eth
$395,804.00
15,557.900 LINK
0.0503%
73
Hotcoin
LINK-BTC$25.43
0.0078627 Eth
$393,011.00
15,451.960 LINK
0.0499%
74
OKX
LINK-USDC$25.46
0.0078703 Eth
$392,375.00
15,700.116 LINK
0.0507%
75
Bitkub
LINK-THB$25.51
0.0078828 Eth
$370,624.00
14,529.224 LINK
0.0469%
76
BitStorage
LINK-ETH$25.39
0.0078487 Eth
$327,517.00
12,899.910 LINK
0.0417%
77
BitDelta
LINK-USDT$25.45
0.0078525 Eth
$324,187.00
12,952.000 LINK
0.0418%
78
BYDFi
LINK-USDC$25.49
0.0078691 Eth
$321,345.00
12,607.720 LINK
0.0407%
79
Coinbase Exchange
LINK-ETH$25.39
0.0078473 Eth
$306,894.00
12,089.060 LINK
0.0391%
80
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$25.36
0.0078373 Eth
$295,018.00
11,837.819 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0382%
81
Binance US
LINK-USDT$25.42
0.0078593 Eth
$269,235.00
10,589.460 LINK
0.0342%
82
Gemini
LINK-ETH$25.18
0.0077846 Eth
$263,056.00
10,445.690 LINK
0.0337%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$25.44
0.0078476 Eth
$212,961.00
209,496.870 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6769%
84
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$25.40
0.0078506 Eth
$205,390.00
8,225.425 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0266%
85
Mercado Bitcoin
LINK-BRL$25.52
0.0078885 Eth
$202,437.00
7,931.474 LINK
0.0256%
86
Foxbit
LINK-BRL$25.51
0.0078863 Eth
$191,024.00
7,467.148 LINK
0.0241%
87
PointPay
LINK-BTC$25.42
0.0078428 Eth
$175,241.00
6,920.621 LINK
0.0224%
88
Bitso
LINK-USD$25.44
0.0078600 Eth
$164,630.00
6,471.777 LINK
0.0209%
89
CoinTR
LINK-TRY$25.49
0.0078655 Eth
$133,376.00
5,346.700 LINK
0.0173%
90
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$25.61
0.0079006 Eth
$131,811.00
5,218.301 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0169%
91
Hotcoin
LINK-ETH$25.45
0.0078632 Eth
$123,712.00
4,861.260 LINK
0.0157%
92
KuCoin
LINK-USDC$25.38
0.0078464 Eth
$122,074.00
4,809.529 LINK
0.0155%
93
Kraken
LINK-ETH$25.46
0.0078622 Eth
$107,576.00
4,224.995 LINK
0.0137%
94
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$25.40
0.0078370 Eth
$105,179.00
4,155.229 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0134%
95
KuCoin
LINK-BTC$25.37
0.0078433 Eth
$78,033.00
3,075.596 LINK
0.0099%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$25.50
0.0078690 Eth
$59,095.00
2,331.606 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0075%
97
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$25.50
0.0078658 Eth
$55,713.00
72.391 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$25.39
0.0078323 Eth
$53,750.00
2,157.465 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0070%
99
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$25.39
0.0078346 Eth
$50,939.00
2,029.328 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0066%
100
Dex-Trade
LINK-ETH$25.39
0.0078487 Eth
$45,914.00
1,808.420 LINK
0.0058%

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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