ETH Price: $3,365.21 (+0.09%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,990 ( 0.019%)

Market

Price

$21.41 @ 0.006362 ETH (-0.23%)

Onchain Market Cap

$21,410,000,000.00

Circulating Supply Market Cap

$13,522,352,176.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.1132244465594106 LINK

Value
$2.42 ( ~0.000719123799618809 Eth) [0.0000%]
0x3483eD7d3444A311a7585F0e59C9A74d6C111218
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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 19363.64% |ETH 0.0003846 1554.19%

Market

Volume (24H):$764,075,110.00
Market Capitalization:$13,522,352,176.00
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$21.36
0.0063446 Eth
$71,306,896.00
3,280,517.510 LINK
20.5548%
2
Coinbase Exchange
LINK-USD$21.38
0.0063485 Eth
$32,956,801.00
1,541,333.870 LINK
9.6576%
3
Slex
LINK-USDT$21.31
0.0063424 Eth
$22,582,228.00
1,039,526.410 LINK
6.5134%
4
Bybit
LINK-USDT$21.37
0.0063483 Eth
$19,873,324.00
914,687.380 LINK
5.7312%
5
WhiteBIT
LINK-USDT$21.41
0.0063571 Eth
$19,171,204.00
895,340.340 LINK
5.6099%
6
P2B
LINK-USDT$21.33
0.0063470 Eth
$14,797,746.00
693,789.540 LINK
4.3471%
7
CoinW
LINK-USDT$21.25
0.0063370 Eth
$12,302,063.00
578,788.240 LINK
3.6265%
8
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.32
0.0063337 Eth
$12,077,417.00
558,470.719 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.4992%
9
OKX
LINK-USDT$21.32
0.0063336 Eth
$10,899,681.00
501,514.894 LINK
3.1423%
10
DigiFinex
LINK-USDT$21.36
0.0063439 Eth
$8,899,995.00
416,739.600 LINK
2.6112%
11
HTX
LINK-USDT$21.37
0.0063487 Eth
$7,694,420.00
354,436.121 LINK
2.2208%
12
Azbit
LINK-USDT$21.37
0.0063476 Eth
$7,104,877.00
326,867.513 LINK
2.0481%
13
XT.COM
LINK-USDT$21.36
0.0063478 Eth
$7,098,051.00
326,468.270 LINK
2.0456%
14
Bithumb
LINK-KRW$21.65
0.0064329 Eth
$6,542,399.00
302,167.727 LINK
1.8933%
15
Bitstamp
LINK-EUR$21.31
0.0063292 Eth
$6,529,072.00
306,433.572 LINK
1.9200%
16
Coinstore
LINK-USDT$21.45
0.0063605 Eth
$6,378,553.00
293,407.190 LINK
1.8384%
17
Bitunix
LINK-USDT$21.38
0.0063482 Eth
$5,655,716.00
264,355.550 LINK
1.6564%
18
Binance
LINK-FDUSD$21.34
0.0063402 Eth
$5,642,647.00
259,676.700 LINK
1.6271%
19
Biconomy.com
LINK-USDT$21.36
0.0063445 Eth
$5,456,897.00
251,199.143 LINK
1.5739%
20
Coinbase Exchange
LINK-GBP$21.39
0.0063511 Eth
$4,592,462.00
214,692.070 LINK
1.3452%
21
BYDFi
LINK-USDT$21.34
0.0063398 Eth
$4,570,412.00
214,147.530 LINK
1.3418%
22
BTSE
LINK-USDT$21.38
0.0063470 Eth
$4,272,368.00
199,873.502 LINK
1.2524%
23
LBank
LINK-USDT$21.43
0.0063552 Eth
$3,684,544.00
171,961.630 LINK
1.0775%
24
LATOKEN
LINK-USDT$21.28
0.0063446 Eth
$3,525,118.00
165,628.424 LINK
1.0378%
25
KuCoin
LINK-USDT$21.36
0.0063438 Eth
$2,896,717.00
135,641.079 LINK
0.8499%
26
Bitvavo
LINK-EUR$21.34
0.0063416 Eth
$2,770,651.00
129,814.630 LINK
0.8134%
27
QMall
LINK-USDT$21.39
0.0063523 Eth
$2,705,815.00
124,346.328 LINK
0.7791%
28
Dex-Trade
LINK-USDT$21.25
0.0063327 Eth
$2,357,589.00
110,923.335 LINK
0.6950%
29
Hotcoin
LINK-USDT$21.40
0.0063526 Eth
$2,019,845.00
94,403.800 LINK
0.5915%
30
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.35
0.0063430 Eth
$1,906,800.00
88,063.615 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5518%
31
CoinEx
LINK-USDT$21.36
0.0063462 Eth
$1,712,209.00
78,691.898 LINK
0.4931%
32
Dcoin
LINK-USDT$21.27
0.0063381 Eth
$1,705,577.00
80,200.000 LINK
0.5025%
33
PointPay
LINK-USDT$21.36
0.0063478 Eth
$1,172,462.00
53,910.423 LINK
0.3378%
34
Bybit
LINK-USDC$21.38
0.0063501 Eth
$1,159,867.00
53,284.436 LINK
0.3339%
35
Coinbase Exchange
LINK-EUR$21.37
0.0063447 Eth
$1,082,437.00
50,654.110 LINK
0.3174%
36
EXMO
LINK-USDT$21.38
0.0063513 Eth
$1,078,404.00
50,449.629 LINK
0.3161%
37
Trubit
LINK-USDT$21.30
0.0063388 Eth
$876,162.00
40,375.800 LINK
0.2530%
38
Phemex
LINK-USDT$21.37
0.0063463 Eth
$839,351.00
39,283.220 LINK
0.2461%
39
tanX
LINK-USDC$21.43
0.0063617 Eth
$773,325.00
35,488.570 LINK
0.2224%
40
WhiteBIT
LINK-BTC$21.30
0.0063405 Eth
$708,233.00
33,244.030 LINK
0.2083%
41
Bitbank
LINK-JPY$21.30
0.0063261 Eth
$638,815.00
29,990.244 LINK
0.1879%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.45
0.0063714 Eth
$623,512.00
28,647.919 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1795%
43
WhiteBIT
LINK-TRY$21.56
0.0064020 Eth
$589,250.00
27,334.630 LINK
0.1713%
44
Binance
LINK-TRY$21.39
0.0063736 Eth
$540,441.00
24,706.320 LINK
0.1548%
45
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.37
0.0063473 Eth
$491,872.00
23,011.919 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1442%
46
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.36
0.0063478 Eth
$392,801.00
18,147.745 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1137%
47
Binance
LINK-EUR$21.22
0.0063210 Eth
$379,085.00
17,445.240 LINK
0.1093%
48
Bitbegin
LINK-USDT$21.29
0.0063487 Eth
$355,476.00
16,364.960 LINK
0.1025%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.39
0.0063541 Eth
$346,042.00
16,140.105 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1011%
50
BigONE
LINK-USDT$21.45
0.0063679 Eth
$330,284.00
15,400.910 LINK
0.0965%
51
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.32
0.0063337 Eth
$313,145.00
23,819.445 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1492%
52
BitMart
LINK-BTC$21.36
0.0063475 Eth
$299,593.00
14,023.940 LINK
0.0879%
53
HashKey Exchange
LINK-USD$21.46
0.0063699 Eth
$298,444.00
13,794.611 LINK
0.0864%
54
QMall
LINK-USDC$21.38
0.0063519 Eth
$251,447.00
11,583.565 LINK
0.0726%
55
Gemini
LINK-USD$21.38
0.0063511 Eth
$248,820.00
11,637.747 LINK
0.0729%
56
Bitci TR
LINK-TRY$21.30
0.0063256 Eth
$222,570.00
10,188.091 LINK
0.0638%
57
WhiteBIT
LINK-EUR$21.32
0.0063323 Eth
$221,861.00
10,407.670 LINK
0.0652%
58
Coinbase Exchange
LINK-ETH$21.41
0.0063595 Eth
$221,409.00
10,340.870 LINK
0.0648%
59
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$21.44
0.0063693 Eth
$218,758.00
10,059.022 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0630%
60
BitDelta
LINK-USDT$21.36
0.0063478 Eth
$204,703.00
9,425.000 LINK
0.0591%
61
KuCoin
LINK-USDC$21.39
0.0063554 Eth
$182,387.00
8,524.801 LINK
0.0534%
62
Coinbase Exchange
LINK-BTC$21.37
0.0063475 Eth
$178,949.00
8,372.700 LINK
0.0525%
63
GMO Japan
LINK-JPY$21.42
0.0063652 Eth
$178,501.00
8,332.400 LINK
0.0522%
64
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.43
0.0063662 Eth
$171,447.00
174,019.530 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.0904%
65
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.40
0.0063585 Eth
$169,807.00
7,861.612 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0493%
66
Coinone
LINK-KRW$21.69
0.0064417 Eth
$158,938.00
7,329.242 LINK
0.0459%
67
LATOKEN
LINK-BTC$21.37
0.0063700 Eth
$148,470.00
6,948.095 LINK
0.0435%
68
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$21.40
0.0063558 Eth
$147,978.00
6,602.267 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0414%
69
BitMart
LINK-ETH$21.36
0.0063480 Eth
$135,315.00
6,333.540 LINK
0.0397%
70
BitStorage
LINK-ETH$21.40
0.0063587 Eth
$132,762.00
6,203.640 LINK
0.0389%
71
OKX
LINK-USDC$21.31
0.0063313 Eth
$122,150.00
5,616.735 LINK
0.0352%
72
PointPay
LINK-BTC$21.32
0.0063452 Eth
$110,388.00
5,109.739 LINK
0.0320%
73
Kraken
LINK-GBP$21.30
0.0063262 Eth
$104,828.00
4,922.273 LINK
0.0308%
74
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$21.46
0.0063752 Eth
$88,005.00
4,066.214 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0255%
75
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.40
0.0063584 Eth
$84,536.00
3,891.288 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0244%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.38
0.0063485 Eth
$80,016.00
3,700.035 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0232%
77
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.32
0.0063334 Eth
$72,411.00
3,375.306 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0211%
78
Bitso
LINK-USD$21.30
0.0063415 Eth
$71,212.00
3,342.522 LINK
0.0209%
79
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$21.41
0.0063624 Eth
$67,631.00
3,130.052 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0196%
80
Hotcoin
LINK-BTC$21.29
0.0063450 Eth
$64,639.00
3,036.270 LINK
0.0190%
81
Binance US
LINK-USDT$21.37
0.0063440 Eth
$59,710.00
2,794.727 LINK
0.0175%
82
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.15
0.0062852 Eth
$55,055.00
2,589.192 0X5947BB275C521040051D82396192181B413227A3
0.0162%
83
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.26
0.0063161 Eth
$54,587.00
2,565.978 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0161%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$21.45
0.0063714 Eth
$50,200.00
2,310.266 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0145%
85
Mercado Bitcoin
LINK-BRL$21.47
0.0063774 Eth
$43,940.00
2,047.002 LINK
0.0128%
86
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.35
0.0063430 Eth
$41,058.00
41,956.751 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.2629%
87
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$21.38
0.0063485 Eth
$40,208.00
2,173.235 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0136%
88
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.38
0.0063534 Eth
$33,088.00
1,562.715 0X5947BB275C521040051D82396192181B413227A3
0.0098%
89
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$21.32
0.0063337 Eth
$32,308.00
1,465.757 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0092%
90
Hotcoin
LINK-ETH$21.28
0.0063396 Eth
$21,661.00
1,017.720 LINK
0.0064%
91
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.34
0.0063398 Eth
$20,968.00
986.635 0X5947BB275C521040051D82396192181B413227A3
0.0062%
92
Korbit
LINK-KRW$21.57
0.0064075 Eth
$19,017.35
861.598 LINK
0.0054%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$21.45
0.0063688 Eth
$16,197.61
743.549 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0047%
94
HTX
LINK-BTC$21.44
0.0063674 Eth
$14,213.83
652.280 LINK
0.0041%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$21.34
0.0063377 Eth
$13,923.31
643.318 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0040%
96
CoinEx
LINK-USDC$21.38
0.0063522 Eth
$13,338.28
619.268 LINK
0.0039%
97
KuCoin
LINK-KCS$21.34
0.0063409 Eth
$8,618.96
403.836 LINK
0.0025%
98
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$21.35
0.0063423 Eth
$8,607.38
11.231 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
99
Bitexen
LINK-TRY$21.29
0.0063368 Eth
$7,599.05
356.993 LINK
0.0022%
100
Ace
LINK-USDT$21.38
0.0063502 Eth
$2,700.37
124.200 LINK
0.0008%

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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