ETH Price: $3,353.41 (+0.56%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,180 ( 0.044%)

Market

Price

$22.65 @ 0.006754 ETH (-0.28%)

Onchain Market Cap

$22,650,000,000.00

Circulating Supply Market Cap

$14,300,281,694.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
carnak.eth
Balance
29.69858173 LINK

Value
$672.67 ( ~0.200593001888898 Eth) [0.0000%]
0x055acb1b90797996b4fa1f7605e74b84887e3821
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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 20490.91% |ETH 0.0003846 1656.11%

Market

Volume (24H):$942,962,368.00
Market Capitalization:$14,300,281,694.00
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
Binance
LINK-USDT$22.58
0.0067293 Eth
$96,666,458.00
4,231,375.940 LINK
18.4605%
2
Coinbase Exchange
LINK-USD$22.58
0.0067299 Eth
$38,581,480.00
1,708,581.540 LINK
7.4542%
3
WhiteBIT
LINK-USDT$22.59
0.0067431 Eth
$38,478,041.00
1,703,523.870 LINK
7.4321%
4
Bitget
LINK-USDT$22.59
0.0067323 Eth
$26,000,772.00
1,137,141.649 LINK
4.9611%
5
MEXC
LINK-USDT$22.61
0.0067379 Eth
$24,291,431.00
1,074,454.870 LINK
4.6876%
6
Slex
LINK-USDT$22.60
0.0067421 Eth
$22,643,014.00
991,249.310 LINK
4.3246%
7
Bybit
LINK-USDT$22.62
0.0067412 Eth
$21,228,106.00
928,942.891 LINK
4.0528%
8
P2B
LINK-USDT$22.64
0.0067473 Eth
$19,298,112.00
852,540.590 LINK
3.7194%
9
OKX
LINK-USDT$22.57
0.0067266 Eth
$19,154,286.00
837,804.459 LINK
3.6552%
10
CoinW
LINK-USDT$22.60
0.0067365 Eth
$16,508,673.00
730,370.390 LINK
3.1864%
11
Gate.io
LINK-USDT$22.60
0.0067362 Eth
$15,755,842.00
688,072.420 LINK
3.0019%
12
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$22.50
0.0067106 Eth
$13,698,374.00
602,724.341 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.6295%
13
DigiFinex
LINK-USDT$22.58
0.0067289 Eth
$12,741,850.00
564,368.310 LINK
2.4622%
14
HTX
LINK-USDT$22.61
0.0067387 Eth
$11,235,113.00
492,242.662 LINK
2.1475%
15
XT.COM
LINK-USDT$22.59
0.0067324 Eth
$9,652,131.00
422,478.700 LINK
1.8432%
16
Azbit
LINK-USDT$22.56
0.0067289 Eth
$9,597,994.00
420,061.672 LINK
1.8326%
17
Coinstore
LINK-USDT$22.57
0.0067322 Eth
$8,480,041.00
371,433.460 LINK
1.6205%
18
Bitunix
LINK-USDT$22.58
0.0067343 Eth
$7,827,476.00
346,790.990 LINK
1.5130%
19
BTSE
LINK-USDT$22.58
0.0067293 Eth
$7,061,878.00
312,772.235 LINK
1.3646%
20
Biconomy.com
LINK-USDT$22.58
0.0067349 Eth
$6,703,636.00
293,309.960 LINK
1.2796%
21
BYDFi
LINK-USDT$22.54
0.0067191 Eth
$6,129,872.00
271,946.020 LINK
1.1864%
22
Hotcoin
LINK-USDT$22.60
0.0067350 Eth
$6,098,772.00
269,879.170 LINK
1.1774%
23
Binance
LINK-FDUSD$22.62
0.0067398 Eth
$5,846,173.00
255,429.960 LINK
1.1144%
24
LATOKEN
LINK-USDT$22.59
0.0067351 Eth
$4,653,118.00
205,987.121 LINK
0.8987%
25
LBank
LINK-USDT$22.61
0.0067414 Eth
$4,429,212.00
195,932.880 LINK
0.8548%
26
Kraken
LINK-USD$22.58
0.0067297 Eth
$4,031,706.00
178,573.598 LINK
0.7791%
27
QMall
LINK-USDT$22.61
0.0067399 Eth
$3,898,774.00
170,664.803 LINK
0.7446%
28
KuCoin
LINK-USDT$22.61
0.0067385 Eth
$3,714,332.00
164,277.962 LINK
0.7167%
29
Dex-Trade
LINK-USDT$22.63
0.0067443 Eth
$3,124,348.00
138,086.539 LINK
0.6024%
30
FMCPAY
LINK-USDT$22.62
0.0067413 Eth
$3,096,672.00
135,651.343 LINK
0.5918%
31
Bitvavo
LINK-EUR$22.65
0.0067507 Eth
$2,522,666.00
111,386.748 LINK
0.4860%
32
Dcoin
LINK-USDT$22.64
0.0067504 Eth
$2,401,751.00
106,093.000 LINK
0.4629%
33
Coinbase Exchange
LINK-GBP$22.63
0.0067466 Eth
$2,268,039.00
100,241.900 LINK
0.4373%
34
PointPay
LINK-USDT$22.59
0.0067315 Eth
$1,577,784.00
68,984.918 LINK
0.3010%
35
EXMO
LINK-USDT$22.62
0.0067412 Eth
$1,534,020.00
67,828.665 LINK
0.2959%
36
FMCPAY
LINK-ETH$22.58
0.0067336 Eth
$1,457,884.00
63,924.640 LINK
0.2789%
37
FMCPAY
LINK-BTC$22.61
0.0067401 Eth
$1,399,745.00
62,100.000 LINK
0.2709%
38
WhiteBIT
LINK-BTC$22.60
0.0067390 Eth
$1,294,931.00
57,301.610 LINK
0.2500%
39
WhiteBIT
LINK-TRY$22.69
0.0067658 Eth
$1,291,968.00
56,930.360 LINK
0.2484%
40
CoinEx
LINK-USDT$22.61
0.0067473 Eth
$1,268,430.00
55,667.598 LINK
0.2429%
41
Bybit
LINK-USDC$22.61
0.0067387 Eth
$1,205,852.00
52,811.492 LINK
0.2304%
42
Coinbase Exchange
LINK-USDT$22.57
0.0067319 Eth
$1,158,408.00
51,319.531 LINK
0.2239%
43
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$22.54
0.0067197 Eth
$1,086,554.00
80,807.996 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3525%
44
Phemex
LINK-USDT$22.57
0.0067282 Eth
$1,025,701.00
45,449.780 LINK
0.1983%
45
BigONE
LINK-USDT$22.57
0.0067291 Eth
$959,039.00
42,484.030 LINK
0.1853%
46
tanX
LINK-USDC$22.63
0.0067451 Eth
$955,905.00
41,833.360 LINK
0.1825%
47
Bitbank
LINK-JPY$22.67
0.0067589 Eth
$933,589.00
41,172.628 LINK
0.1796%
48
EarnBIT
LINK-USDT$22.59
0.0067452 Eth
$920,692.00
40,246.325 LINK
0.1756%
49
Coinbase Exchange
LINK-EUR$22.58
0.0067330 Eth
$893,670.00
39,577.850 LINK
0.1727%
50
BitStorage
LINK-USDT$22.59
0.0067388 Eth
$757,883.00
33,547.780 LINK
0.1464%
51
Gemini
LINK-USD$22.63
0.0067451 Eth
$754,456.00
33,336.819 LINK
0.1454%
52
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.56
0.0067237 Eth
$745,670.00
32,718.458 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1427%
53
itBit
LINK-USD$22.62
0.0067415 Eth
$578,376.00
25,569.225 LINK
0.1116%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$22.57
0.0067281 Eth
$570,398.00
24,946.812 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1088%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.58
0.0067292 Eth
$538,152.00
23,455.268 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1023%
56
Binance
LINK-EUR$22.61
0.0067378 Eth
$518,367.00
22,693.780 LINK
0.0990%
57
Binance
LINK-TRY$22.69
0.0067627 Eth
$515,485.00
22,419.720 LINK
0.0978%
58
Koinpark
LINK-USDT$22.57
0.0067245 Eth
$489,401.00
21,686.398 LINK
0.0946%
59
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$22.69
0.0067644 Eth
$469,852.00
20,633.224 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0900%
60
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.53
0.0067161 Eth
$455,561.00
20,020.194 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0873%
61
WhiteBIT
LINK-EUR$22.59
0.0067465 Eth
$440,250.00
19,487.000 LINK
0.0850%
62
HashKey Exchange
LINK-USD$22.63
0.0067398 Eth
$422,391.00
18,362.339 LINK
0.0801%
63
GMO Japan
LINK-JPY$22.59
0.0067350 Eth
$418,152.00
18,506.500 LINK
0.0807%
64
Slex
LINK-ETH$22.58
0.0067315 Eth
$389,202.00
17,062.450 LINK
0.0744%
65
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$22.66
0.0067533 Eth
$387,113.00
16,897.964 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0737%
66
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$22.54
0.0067175 Eth
$384,085.00
389,221.087 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.6981%
67
BitMart
LINK-BTC$22.58
0.0067297 Eth
$331,201.00
14,668.060 LINK
0.0640%
68
QMall
LINK-USDC$22.59
0.0067338 Eth
$291,872.00
12,767.905 LINK
0.0557%
69
BitDelta
LINK-USDT$22.58
0.0067312 Eth
$276,536.00
12,122.000 LINK
0.0529%
70
OKX
LINK-USDC$22.61
0.0067394 Eth
$252,923.00
11,077.073 LINK
0.0483%
71
Bitci TR
LINK-TRY$22.59
0.0067355 Eth
$233,247.00
10,168.470 LINK
0.0444%
72
Hotcoin
LINK-BTC$22.60
0.0067364 Eth
$209,978.00
9,289.820 LINK
0.0405%
73
Coinbase Exchange
LINK-BTC$22.60
0.0067385 Eth
$192,520.00
8,519.140 LINK
0.0372%
74
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.52
0.0067178 Eth
$192,207.00
8,416.125 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0367%
75
LATOKEN
LINK-BTC$22.57
0.0067276 Eth
$175,194.00
7,761.317 LINK
0.0339%
76
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$22.67
0.0067588 Eth
$171,050.00
7,502.179 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0327%
77
Bitbegin
LINK-USDT$22.59
0.0067453 Eth
$161,358.00
7,146.775 LINK
0.0312%
78
BitStorage
LINK-ETH$22.63
0.0067407 Eth
$146,067.00
6,455.680 LINK
0.0282%
79
BitMart
LINK-ETH$22.58
0.0067308 Eth
$128,120.00
5,673.160 LINK
0.0248%
80
PointPay
LINK-BTC$22.55
0.0067264 Eth
$124,318.00
5,512.982 LINK
0.0241%
81
Bitso
LINK-USD$22.64
0.0067475 Eth
$108,497.00
4,793.141 LINK
0.0209%
82
Bitkub
LINK-THB$22.78
0.0067961 Eth
$106,498.00
4,674.051 LINK
0.0204%
83
KuCoin
LINK-USDC$22.63
0.0067437 Eth
$103,445.00
4,571.636 LINK
0.0199%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$22.54
0.0067175 Eth
$102,439.00
4,506.742 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0197%
85
Binance US
LINK-USDT$22.61
0.0067399 Eth
$101,747.00
4,500.341 LINK
0.0196%
86
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$22.54
0.0067175 Eth
$100,276.00
4,386.902 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0191%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$22.75
0.0067806 Eth
$91,865.00
92,739.255 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4046%
88
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$22.56
0.0067273 Eth
$81,852.00
6,135.605 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0268%
89
Hotcoin
LINK-ETH$22.59
0.0067318 Eth
$74,713.00
3,307.060 LINK
0.0144%
90
KuCoin
LINK-BTC$22.58
0.0067300 Eth
$74,398.00
3,294.659 LINK
0.0144%
91
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$22.58
0.0067349 Eth
$68,322.00
2,991.527 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0131%
92
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$22.55
0.0067205 Eth
$68,105.00
2,988.428 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0130%
93
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$22.66
0.0067526 Eth
$58,898.00
2,587.669 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0113%
94
Mercado Bitcoin
LINK-BRL$22.60
0.0067354 Eth
$52,863.00
2,339.124 LINK
0.0102%
95
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$22.68
0.0067606 Eth
$43,074.00
1,901.693 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0083%
96
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$22.64
0.0067497 Eth
$36,020.00
1,574.777 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0069%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$22.59
0.0067322 Eth
$23,435.00
1,036.660 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0045%
98
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$22.68
0.0067644 Eth
$19,695.73
874.848 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0038%
99
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$22.93
0.0068355 Eth
$17,510.56
767.153 0X5947BB275C521040051D82396192181B413227A3
0.0033%
100
Bitexen
LINK-TRY$22.50
0.0067140 Eth
$16,941.62
753.126 LINK
0.0033%

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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