ETH Price: $2,665.87 (-5.09%)
Gas: 1.06 Gwei

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

739,052 ( 0.016%)

Market

Price

$16.36 @ 0.006137 ETH (-7.19%)

Onchain Market Cap

$16,360,000,000.00

Circulating Supply Market Cap

$10,448,852,862.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
42.3579 LINK

Value
$692.98 ( ~0.25994492112619 Eth) [0.0000%]
0x171170a9974ce70d206dbc9bb027acba530bbd3b
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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 14772.73% |ETH 0.0003846 1495.68%

Market

Volume (24H):$539,411,210.00
Market Capitalization:$10,448,852,862.00
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$16.47
0.0061598 Eth
$58,010,682.00
3,478,794.030 LINK
19.2292%
2
MEXC
LINK-USDT$16.45
0.0061514 Eth
$32,559,663.00
1,978,968.800 LINK
10.9388%
3
Coinbase Exchange
LINK-USD$16.35
0.0061378 Eth
$20,661,573.00
1,263,859.350 LINK
6.9860%
4
HTX
LINK-USDT$16.35
0.0061384 Eth
$13,912,909.00
822,455.599 LINK
4.5462%
5
Gate.io
LINK-USDT$16.34
0.0061347 Eth
$12,284,226.00
741,401.320 LINK
4.0981%
6
Bybit
LINK-USDT$16.35
0.0061367 Eth
$11,519,337.00
686,807.412 LINK
3.7964%
7
P2B
LINK-USDT$16.39
0.0061259 Eth
$11,517,185.00
702,792.730 LINK
3.8847%
8
KuCoin
LINK-USDT$16.34
0.0061362 Eth
$9,794,056.00
599,260.184 LINK
3.3124%
9
Bitget
LINK-USDT$16.34
0.0061348 Eth
$7,980,439.00
475,946.530 LINK
2.6308%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$16.34
0.0061334 Eth
$7,841,530.00
479,406.230 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.6499%
11
OKX
LINK-USDT$16.34
0.0061336 Eth
$6,674,419.00
400,059.184 LINK
2.2113%
12
Binance
LINK-FDUSD$16.46
0.0061483 Eth
$6,064,744.00
362,535.020 LINK
2.0039%
13
XT.COM
LINK-USDT$16.36
0.0061441 Eth
$5,789,360.00
346,921.130 LINK
1.9176%
14
MEXC
LINK-EUR$16.35
0.0061373 Eth
$5,598,250.00
342,470.890 LINK
1.8930%
15
MEXC
LINK-USDC$16.37
0.0061401 Eth
$5,390,790.00
329,345.220 LINK
1.8205%
16
Hotcoin
LINK-USDT$16.34
0.0061347 Eth
$5,238,269.00
320,583.820 LINK
1.7720%
17
LBank
LINK-USDT$16.38
0.0061516 Eth
$5,010,827.00
305,907.700 LINK
1.6909%
18
Coinstore
LINK-USDT$16.34
0.0061339 Eth
$4,873,065.00
291,595.060 LINK
1.6118%
19
Binance
LINK-USDC$16.35
0.0061381 Eth
$4,743,536.00
283,423.230 LINK
1.5666%
20
CoinW
LINK-USDT$16.38
0.0061434 Eth
$4,377,282.00
267,282.140 LINK
1.4774%
21
Kraken
LINK-USD$16.36
0.0061417 Eth
$3,506,725.00
214,361.244 LINK
1.1849%
22
Azbit
LINK-USDT$16.37
0.0061468 Eth
$3,503,292.00
209,792.229 LINK
1.1596%
23
Bitunix
LINK-USDT$16.37
0.0061437 Eth
$3,376,173.00
206,227.230 LINK
1.1399%
24
BYDFi
LINK-USDT$16.44
0.0061410 Eth
$3,197,054.00
194,473.570 LINK
1.0750%
25
BTSE
LINK-USDT$16.35
0.0061387 Eth
$2,751,639.00
168,289.606 LINK
0.9302%
26
LATOKEN
LINK-USDT$16.34
0.0061348 Eth
$2,720,830.00
166,509.678 LINK
0.9204%
27
QMall
LINK-USDT$16.38
0.0061508 Eth
$2,371,752.00
142,048.702 LINK
0.7852%
28
FMCPAY
LINK-USDT$16.35
0.0061339 Eth
$2,168,372.00
128,613.797 LINK
0.7109%
29
Bitvavo
LINK-EUR$16.37
0.0061470 Eth
$2,129,810.00
130,082.037 LINK
0.7190%
30
Dex-Trade
LINK-USDT$16.37
0.0061468 Eth
$1,844,307.00
112,663.066 LINK
0.6227%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.39
0.0061545 Eth
$1,594,497.00
96,961.742 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5360%
32
CoinEx
LINK-USDT$16.38
0.0061506 Eth
$1,348,728.00
80,798.356 LINK
0.4466%
33
Biconomy.com
LINK-USDT$16.39
0.0061266 Eth
$1,318,479.00
78,041.150 LINK
0.4314%
34
Coinbase Exchange
LINK-EUR$16.37
0.0061456 Eth
$1,312,882.00
80,215.900 LINK
0.4434%
35
Binance
LINK-ETH$16.46
0.0061460 Eth
$1,125,074.00
67,987.750 LINK
0.3758%
36
Coinbase Exchange
LINK-GBP$16.36
0.0061437 Eth
$1,025,129.00
62,653.700 LINK
0.3463%
37
FMCPAY
LINK-ETH$16.36
0.0061424 Eth
$961,896.00
58,243.680 LINK
0.3219%
38
FMCPAY
LINK-BTC$16.37
0.0061471 Eth
$949,248.00
56,645.400 LINK
0.3131%
39
PointPay
LINK-USDT$16.37
0.0061456 Eth
$917,321.00
54,874.534 LINK
0.3033%
40
Bitbank
LINK-JPY$16.37
0.0061463 Eth
$756,696.00
46,215.844 LINK
0.2555%
41
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$16.35
0.0061404 Eth
$668,756.00
40,216.579 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2223%
42
tanX
LINK-USDC$16.37
0.0061432 Eth
$667,483.00
39,475.220 LINK
0.2182%
43
BigONE
LINK-USDT$16.35
0.0061390 Eth
$657,896.00
40,228.820 LINK
0.2224%
44
EXMO
LINK-USDT$16.36
0.0061417 Eth
$656,381.00
40,123.586 LINK
0.2218%
45
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$16.40
0.0061596 Eth
$520,400.00
31,466.014 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1739%
46
WhiteBIT
LINK-BTC$16.44
0.0061419 Eth
$513,377.00
31,221.680 LINK
0.1726%
47
Binance
LINK-EUR$16.45
0.0061527 Eth
$497,171.00
29,620.140 LINK
0.1637%
48
LATOKEN
LINK-BTC$16.34
0.0061361 Eth
$487,042.00
29,800.099 LINK
0.1647%
49
Gemini
LINK-USD$16.36
0.0061427 Eth
$466,590.00
28,518.444 LINK
0.1576%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.40
0.0061600 Eth
$401,613.00
24,551.369 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1357%
51
QMall
LINK-USDC$16.37
0.0061481 Eth
$379,953.00
22,692.868 LINK
0.1254%
52
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.37
0.0061465 Eth
$379,751.00
389,795.354 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.1546%
53
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.40
0.0061574 Eth
$376,746.00
22,943.196 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1268%
54
XT.COM
LINK-ETH$16.39
0.0061489 Eth
$313,172.00
19,002.190 LINK
0.1050%
55
Binance
LINK-TRY$16.40
0.0061578 Eth
$309,824.00
18,499.990 LINK
0.1023%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$16.35
0.0061369 Eth
$306,472.00
18,545.752 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1025%
57
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$16.39
0.0061545 Eth
$287,414.00
17,076.462 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0944%
58
BitMart
LINK-BTC$16.36
0.0061436 Eth
$276,990.00
16,931.980 LINK
0.0936%
59
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$16.34
0.0061334 Eth
$264,776.00
31,448.597 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1738%
60
GMO Japan
LINK-JPY$16.51
0.0061997 Eth
$260,402.00
15,769.800 LINK
0.0872%
61
BitStorage
LINK-ETH$16.37
0.0061465 Eth
$250,848.00
15,322.650 LINK
0.0847%
62
Slex
LINK-ETH$16.38
0.0061473 Eth
$234,595.00
14,211.320 LINK
0.0786%
63
Coinbase Exchange
LINK-BTC$16.35
0.0061393 Eth
$201,312.00
12,310.690 LINK
0.0680%
64
BitDelta
LINK-USDT$16.36
0.0061408 Eth
$197,075.00
11,695.000 LINK
0.0646%
65
Bybit
LINK-USDC$16.49
0.0061906 Eth
$195,064.00
11,548.040 LINK
0.0638%
66
OKX
LINK-USDC$16.34
0.0061331 Eth
$190,626.00
11,446.757 LINK
0.0633%
67
Hotcoin
LINK-BTC$16.49
0.0061569 Eth
$182,334.00
11,057.270 LINK
0.0611%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.36
0.0061427 Eth
$181,849.00
11,061.954 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0611%
69
Bitci TR
LINK-TRY$16.53
0.0062062 Eth
$168,356.00
9,893.130 LINK
0.0547%
70
BYDFi
LINK-USDC$16.49
0.0061928 Eth
$165,846.00
10,057.400 LINK
0.0556%
71
Kraken
LINK-GBP$16.37
0.0061458 Eth
$165,291.00
10,097.276 LINK
0.0558%
72
Bitkub
LINK-THB$16.52
0.0062018 Eth
$164,113.00
9,935.165 LINK
0.0549%
73
CoinTR
LINK-TRY$16.37
0.0061404 Eth
$157,820.00
9,298.280 LINK
0.0514%
74
Coinbase Exchange
LINK-USDT$16.43
0.0061671 Eth
$151,412.00
9,215.940 LINK
0.0509%
75
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$16.39
0.0061543 Eth
$150,173.00
9,137.326 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0505%
76
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.38
0.0061479 Eth
$140,219.00
8,782.168 0X5947BB275C521040051D82396192181B413227A3
0.0485%
77
KuCoin
LINK-USDC$16.35
0.0061369 Eth
$131,529.00
8,046.777 LINK
0.0445%
78
bitcastle
LINK-USDT$16.35
0.0061370 Eth
$122,620.00
7,335.790 LINK
0.0405%
79
WhiteBIT
LINK-TRY$16.42
0.0061632 Eth
$107,656.00
6,557.090 LINK
0.0362%
80
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$16.38
0.0061491 Eth
$94,761.00
5,584.753 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0309%
81
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$16.37
0.0061483 Eth
$87,990.00
5,345.275 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0295%
82
Coinbase Exchange
LINK-ETH$16.38
0.0061498 Eth
$84,099.00
5,134.300 LINK
0.0284%
83
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$16.39
0.0061567 Eth
$74,974.00
4,485.683 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0248%
84
Bitso
LINK-USD$16.35
0.0061407 Eth
$70,091.00
4,285.913 LINK
0.0237%
85
Kanga
LINK-PLN$16.38
0.0061481 Eth
$67,018.00
0.000 LINK
0.0000%
86
Binance US
LINK-USDT$16.41
0.0061338 Eth
$55,112.00
3,357.593 LINK
0.0186%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$16.39
0.0061545 Eth
$54,519.00
56,178.935 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3105%
88
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$16.37
0.0061462 Eth
$53,452.00
3,247.342 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0179%
89
Hotcoin
LINK-ETH$16.35
0.0061409 Eth
$50,095.00
3,063.090 LINK
0.0169%
90
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$16.38
0.0061511 Eth
$49,297.00
2,997.447 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0166%
91
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$16.46
0.0061797 Eth
$43,332.00
44,388.257 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2454%
92
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.37
0.0061477 Eth
$41,744.00
2,595.920 0X5947BB275C521040051D82396192181B413227A3
0.0143%
93
Dex-Trade
LINK-ETH$16.44
0.0061460 Eth
$33,258.00
2,023.390 LINK
0.0112%
94
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$16.34
0.0061334 Eth
$32,130.00
1,928.877 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0107%
95
Bitexen
LINK-TRY$16.27
0.0060836 Eth
$28,726.00
1,765.083 LINK
0.0098%
96
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$16.37
0.0061464 Eth
$21,010.00
1,301.836 0X5947BB275C521040051D82396192181B413227A3
0.0072%
97
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$16.43
0.0061714 Eth
$16,442.84
965.434 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0053%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$16.42
0.0061639 Eth
$15,669.91
953.657 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0053%
99
Bittime
LINK-IDR$16.47
0.0061518 Eth
$9,927.49
597.050 LINK
0.0033%
100
Bittime
LINK-USDT$16.36
0.0061391 Eth
$9,742.00
590.100 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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