ETH Price: $2,492.54 (+3.46%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,634 ( 0.021%)

Market

Price

$11.10 @ 0.004453 ETH (+7.87%)

Onchain Market Cap

$11,100,000,000.00

Circulating Supply Market Cap

$6,943,895,488.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
55.81585398 LINK

Value
$619.56 ( ~0.248565300674789 Eth) [0.0000%]
0xe1c1a2a463ee62fb790bd7bb983898f3bb825a68
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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 9990.91% |ETH 0.0003846 1057.83%

Market

Volume (24H):$409,970,619.00
Market Capitalization:$6,943,895,488.00
Circulating Supply:626,849,971.00 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
WhiteBIT
LINK-USDT$11.16
0.0044571 Eth
$34,255,332.00
3,069,636.310 LINK
16.3702%
2
Binance
LINK-USDT$11.07
0.0044481 Eth
$27,070,416.00
2,530,487.460 LINK
13.4949%
3
Coinbase Exchange
LINK-USD$11.16
0.0044561 Eth
$15,150,163.00
1,357,906.560 LINK
7.2416%
4
HTX
LINK-USDT$11.16
0.0044580 Eth
$11,974,603.00
1,124,377.850 LINK
5.9962%
5
Bitget
LINK-USDT$11.15
0.0044529 Eth
$9,524,135.00
893,956.388 LINK
4.7674%
6
Bybit
LINK-USDT$11.15
0.0044532 Eth
$7,975,832.00
746,329.700 LINK
3.9801%
7
BTSE
LINK-USDT$11.16
0.0044554 Eth
$6,082,339.00
545,207.373 LINK
2.9076%
8
Gate.io
LINK-USDT$11.13
0.0044462 Eth
$5,849,720.00
542,009.400 LINK
2.8905%
9
Slex
LINK-USDT$11.15
0.0044541 Eth
$5,506,960.00
516,522.810 LINK
2.7546%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.13
0.0044440 Eth
$5,407,175.00
491,750.526 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.6225%
11
P2B
LINK-USDT$11.15
0.0044542 Eth
$5,263,435.00
471,927.100 LINK
2.5168%
12
OKX
LINK-USDT$11.14
0.0044511 Eth
$4,857,050.00
454,333.058 LINK
2.4229%
13
Azbit
LINK-USDT$11.12
0.0044415 Eth
$4,418,195.00
414,738.290 LINK
2.2118%
14
Hotcoin
LINK-USDT$11.12
0.0044670 Eth
$3,873,641.00
348,474.380 LINK
1.8584%
15
DigiFinex
LINK-USDT$11.16
0.0044581 Eth
$3,775,378.00
338,170.810 LINK
1.8034%
16
Ourbit
LINK-USDT$11.16
0.0044591 Eth
$3,506,508.00
328,748.860 LINK
1.7532%
17
Biconomy.com
LINK-USDT$11.15
0.0044517 Eth
$3,469,093.00
325,511.510 LINK
1.7359%
18
Upbit
LINK-KRW$11.16
0.0044584 Eth
$3,378,326.00
302,584.313 LINK
1.6137%
19
Bitunix
LINK-USDT$11.15
0.0044554 Eth
$3,332,375.00
298,888.460 LINK
1.5940%
20
CoinW
LINK-USDT$11.08
0.0044534 Eth
$2,997,872.00
270,557.830 LINK
1.4429%
21
XT.COM
LINK-USDT$11.10
0.0044543 Eth
$2,732,659.00
255,339.700 LINK
1.3617%
22
Trubit
LINK-USDT$11.15
0.0044563 Eth
$2,154,004.00
200,925.030 LINK
1.0715%
23
LBank
LINK-USDT$11.18
0.0044653 Eth
$1,935,472.00
173,131.110 LINK
0.9233%
24
C-Patex
LINK-USDT$11.12
0.0044433 Eth
$1,898,304.00
170,700.594 LINK
0.9103%
25
Coinstore
LINK-USDT$11.05
0.0044529 Eth
$1,875,851.00
175,571.930 LINK
0.9363%
26
AscendEX (BitMax)
LINK-USDT$11.18
0.0044651 Eth
$1,789,263.00
160,085.400 LINK
0.8537%
27
KuCoin
LINK-USDT$11.16
0.0044601 Eth
$1,490,155.00
133,505.686 LINK
0.7120%
28
BYDFi
LINK-USDT$11.17
0.0044621 Eth
$1,397,387.00
125,108.740 LINK
0.6672%
29
Bithumb
LINK-KRW$11.17
0.0044609 Eth
$1,269,607.00
113,640.556 LINK
0.6060%
30
Binance
LINK-BTC$11.09
0.0044524 Eth
$1,257,720.00
114,114.490 LINK
0.6086%
31
Binance
LINK-FDUSD$11.20
0.0044740 Eth
$1,237,258.00
114,909.710 LINK
0.6128%
32
WhiteBIT
LINK-BTC$11.16
0.0044600 Eth
$1,170,492.00
104,860.590 LINK
0.5592%
33
Bitvavo
LINK-EUR$11.11
0.0044546 Eth
$1,037,789.00
93,443.046 LINK
0.4983%
34
Dex-Trade
LINK-USDT$11.14
0.0044501 Eth
$955,181.00
85,704.976 LINK
0.4571%
35
HashKey Global
LINK-USDT$11.09
0.0044499 Eth
$841,002.00
79,509.804 LINK
0.4240%
36
Azbit
LINK-ETH$11.12
0.0044521 Eth
$835,104.00
76,229.762 LINK
0.4065%
37
BigONE
LINK-USDT$11.16
0.0044570 Eth
$698,033.00
62,557.150 LINK
0.3336%
38
Binance
LINK-USDC$11.05
0.0044376 Eth
$694,494.00
65,016.880 LINK
0.3467%
39
AscendEX (BitMax)
LINK-BTC$11.22
0.0044813 Eth
$615,497.00
54,870.200 LINK
0.2926%
40
LATOKEN
LINK-USDT$11.07
0.0044613 Eth
$528,737.00
47,769.405 LINK
0.2548%
41
EXMO
LINK-USDT$11.16
0.0044572 Eth
$501,755.00
44,953.205 LINK
0.2397%
42
CoinEx
LINK-USDT$11.14
0.0044512 Eth
$496,957.00
46,219.314 LINK
0.2465%
43
tanX
LINK-USDC$11.11
0.0044569 Eth
$480,099.00
45,060.080 LINK
0.2403%
44
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.11
0.0044380 Eth
$423,388.00
38,598.378 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2058%
45
PointPay
LINK-USDT$11.15
0.0044529 Eth
$343,433.00
31,991.520 LINK
0.1706%
46
WhiteBIT
LINK-TRY$11.13
0.0044724 Eth
$336,144.00
30,208.450 LINK
0.1611%
47
WhiteBIT
LINK-EUR$11.11
0.0044386 Eth
$326,265.00
29,369.940 LINK
0.1566%
48
Bybit
LINK-USDC$11.16
0.0044576 Eth
$306,970.00
28,810.269 LINK
0.1536%
49
Gemini
LINK-USD$11.15
0.0044521 Eth
$306,271.00
27,468.272 LINK
0.1465%
50
Phemex
LINK-USDT$11.16
0.0044590 Eth
$298,969.00
26,791.100 LINK
0.1429%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.13
0.0044451 Eth
$270,717.00
24,627.324 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1313%
52
LATOKEN
LINK-BTC$11.04
0.0044364 Eth
$243,777.00
22,072.297 LINK
0.1177%
53
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$10.99
0.0043904 Eth
$228,860.00
21,043.949 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1122%
54
BitStorage
LINK-USDT$11.09
0.0044506 Eth
$225,746.00
20,356.880 LINK
0.1086%
55
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.16
0.0044551 Eth
$218,046.00
19,843.785 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1058%
56
BitMart
LINK-BTC$11.14
0.0044508 Eth
$207,529.00
18,627.560 LINK
0.0993%
57
Coinbase Exchange
LINK-GBP$11.16
0.0044575 Eth
$201,180.00
18,024.580 LINK
0.0961%
58
BYDFi
LINK-USDC$11.07
0.0044444 Eth
$200,530.00
18,121.690 LINK
0.0966%
59
Slex
LINK-ETH$11.17
0.0044623 Eth
$195,780.00
17,856.260 LINK
0.0952%
60
Coinbase Exchange
LINK-EUR$11.12
0.0044417 Eth
$186,542.00
16,769.310 LINK
0.0894%
61
BitDelta
LINK-USDT$11.15
0.0044541 Eth
$165,935.00
15,578.000 LINK
0.0831%
62
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.20
0.0044723 Eth
$164,433.00
14,962.053 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0798%
63
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.16
0.0044565 Eth
$136,283.00
131,073.066 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6990%
64
Binance
LINK-ETH$11.06
0.0044413 Eth
$133,449.00
12,194.710 LINK
0.0650%
65
OKX
LINK-USDC$11.17
0.0044618 Eth
$123,512.00
11,466.966 LINK
0.0612%
66
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.06
0.0044189 Eth
$119,549.00
10,974.890 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0585%
67
Binance
LINK-EUR$11.16
0.0044551 Eth
$114,476.00
10,736.780 LINK
0.0573%
68
Bitci TR
LINK-TRY$11.10
0.0044525 Eth
$110,107.00
10,297.970 LINK
0.0549%
69
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.13
0.0044440 Eth
$110,043.00
10,327.977 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0551%
70
Slex
LINK-BTC$11.15
0.0044544 Eth
$77,907.00
7,078.200 LINK
0.0377%
71
Binance
LINK-TRY$11.13
0.0044666 Eth
$77,427.00
7,189.050 LINK
0.0383%
72
Bitkub
LINK-THB$11.15
0.0044540 Eth
$76,101.00
6,826.794 LINK
0.0364%
73
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.12
0.0044419 Eth
$71,862.00
69,116.561 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3686%
74
GMO Japan
LINK-JPY$11.17
0.0044601 Eth
$71,375.00
6,389.800 LINK
0.0341%
75
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.11
0.0044380 Eth
$53,024.00
4,960.263 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0265%
76
Binance
LINK-BRL$11.16
0.0044565 Eth
$52,517.00
4,823.870 LINK
0.0257%
77
Kraken
LINK-GBP$11.04
0.0044067 Eth
$51,553.00
4,671.175 LINK
0.0249%
78
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.16
0.0044565 Eth
$50,072.00
4,665.158 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0249%
79
Mercado Bitcoin
LINK-BRL$11.15
0.0044541 Eth
$37,391.00
3,351.973 LINK
0.0179%
80
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$10.99
0.0043904 Eth
$33,841.00
32,909.542 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1755%
81
Binance
LINK-BNB$11.09
0.0044523 Eth
$31,677.00
2,918.623 LINK
0.0156%
82
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.13
0.0044477 Eth
$30,577.00
2,779.697 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0148%
83
KuCoin
LINK-USDC$11.17
0.0044625 Eth
$28,694.00
2,569.309 LINK
0.0137%
84
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.14
0.0044466 Eth
$26,487.00
2,400.169 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0128%
85
Binance US
LINK-USDT$11.08
0.0044255 Eth
$24,665.00
2,226.938 LINK
0.0119%
86
EXMO
LINK-BTC$11.19
0.0044699 Eth
$24,591.00
2,197.790 LINK
0.0117%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.11
0.0044502 Eth
$18,881.84
1,728.808 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0092%
88
Nonkyc.io
LINK-BTC$11.13
0.0044690 Eth
$18,054.94
1,648.568 LINK
0.0088%
89
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.11
0.0044380 Eth
$17,639.20
16,988.442 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0906%
90
CoinEx
LINK-BTC$11.13
0.0044425 Eth
$17,445.53
1,568.387 LINK
0.0084%
91
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.11
0.0044380 Eth
$14,461.27
1,317.867 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0070%
92
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.18
0.0044631 Eth
$13,699.55
1,227.501 0X5947BB275C521040051D82396192181B413227A3
0.0065%
93
Coinone
LINK-KRW$11.19
0.0044682 Eth
$12,974.95
1,159.710 LINK
0.0062%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.08
0.0044263 Eth
$12,159.43
1,111.481 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0059%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.13
0.0044564 Eth
$11,125.64
1,034.630 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0055%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD93F7E271CB87C23AAA73EDC008A79646D1F9912$11.05
0.0044139 Eth
$11,013.24
981.302 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0052%
97
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.08
0.0044248 Eth
$9,039.12
807.420 0X5947BB275C521040051D82396192181B413227A3
0.0043%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.16
0.0044572 Eth
$7,535.54
685.042 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0037%
99
HTX
LINK-BTC$11.07
0.0044206 Eth
$5,608.13
506.738 LINK
0.0027%
100
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0XDA10009CBD5D07DD0CECC66161FC93D7C9000DA1$11.10
0.0044509 Eth
$211.20
19.648 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0001%

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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