ETH Price: $2,607.51 (-4.49%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

733,144 ( -0.008%)

Market

Price

$17.96 @ 0.006888 ETH (-5.16%)

Onchain Market Cap

$17,960,000,000.00

Circulating Supply Market Cap

$11,476,578,122.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
family-vault.eth
Balance
160.441811077049821467 LINK

Value
$2,881.53 ( ~1.1051 Eth) [0.0000%]
0x8a7f162daac546997cc36b6b7c528a21800507b9
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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 16227.27% |ETH 0.0003846 1690.95%

Market

Volume (24H):$731,785,376.00
Market Capitalization:$11,476,578,122.00
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$18.00
0.0068888 Eth
$105,491,873.00
5,580,089.500 LINK
23.1666%
2
Coinbase Exchange
LINK-USD$17.93
0.0068734 Eth
$47,676,538.00
2,658,888.960 LINK
11.0388%
3
Bybit
LINK-USDT$17.95
0.0068801 Eth
$31,306,634.00
1,668,336.930 LINK
6.9263%
4
HTX
LINK-USDT$17.93
0.0068719 Eth
$20,992,125.00
1,125,853.630 LINK
4.6741%
5
P2B
LINK-USDT$17.93
0.0068737 Eth
$18,160,922.00
1,012,621.700 LINK
4.2040%
6
Slex
LINK-USDT$17.93
0.0068716 Eth
$14,502,912.00
776,073.470 LINK
3.2220%
7
Gate.io
LINK-USDT$17.92
0.0068691 Eth
$13,451,651.00
716,948.380 LINK
2.9765%
8
OKX
LINK-USDT$17.94
0.0068743 Eth
$12,265,779.00
651,583.025 LINK
2.7051%
9
DigiFinex
LINK-USDT$17.94
0.0068743 Eth
$12,186,527.00
679,333.760 LINK
2.8204%
10
Binance
LINK-USDC$17.96
0.0068754 Eth
$11,296,753.00
601,118.210 LINK
2.4956%
11
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.92
0.0068689 Eth
$11,282,849.00
618,958.819 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.5697%
12
XT.COM
LINK-USDT$17.94
0.0068734 Eth
$10,361,012.00
548,177.860 LINK
2.2758%
13
MEXC
LINK-USDT$17.93
0.0068738 Eth
$9,125,210.00
508,818.340 LINK
2.1124%
14
Coinstore
LINK-USDT$17.96
0.0068820 Eth
$8,529,786.00
452,698.310 LINK
1.8794%
15
Binance
LINK-FDUSD$17.88
0.0068535 Eth
$7,407,081.00
393,900.180 LINK
1.6353%
16
Bitunix
LINK-USDT$17.94
0.0068756 Eth
$6,955,153.00
387,591.280 LINK
1.6091%
17
CoinW
LINK-USDT$18.02
0.0068898 Eth
$6,826,616.00
378,907.580 LINK
1.5731%
18
BTSE
LINK-USDT$17.97
0.0068786 Eth
$6,521,781.00
362,961.062 LINK
1.5069%
19
KuCoin
LINK-USDT$17.93
0.0068717 Eth
$6,512,451.00
363,282.723 LINK
1.5082%
20
Azbit
LINK-USDT$17.95
0.0068772 Eth
$6,170,740.00
326,612.291 LINK
1.3560%
21
BYDFi
LINK-USDT$18.02
0.0068930 Eth
$5,624,782.00
312,187.500 LINK
1.2961%
22
LATOKEN
LINK-USDT$17.94
0.0068739 Eth
$5,180,382.00
288,841.536 LINK
1.1992%
23
LBank
LINK-USDT$17.96
0.0068755 Eth
$4,817,481.00
268,227.940 LINK
1.1136%
24
Bitvavo
LINK-EUR$17.95
0.0068784 Eth
$4,446,218.00
247,754.185 LINK
1.0286%
25
QMall
LINK-USDT$18.01
0.0068924 Eth
$4,275,403.00
226,273.151 LINK
0.9394%
26
Coinbase Exchange
LINK-EUR$17.95
0.0068803 Eth
$3,720,974.00
207,305.980 LINK
0.8607%
27
Kraken
LINK-USD$17.93
0.0068737 Eth
$3,465,839.00
193,278.796 LINK
0.8024%
28
Dex-Trade
LINK-USDT$18.01
0.0068783 Eth
$3,180,478.00
176,628.192 LINK
0.7333%
29
FMCPAY
LINK-USDT$17.94
0.0068721 Eth
$2,707,703.00
145,061.818 LINK
0.6022%
30
Biconomy.com
LINK-USDT$17.95
0.0068783 Eth
$1,812,889.00
96,747.040 LINK
0.4017%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.94
0.0068763 Eth
$1,715,384.00
94,027.597 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3904%
32
PointPay
LINK-USDT$17.95
0.0068772 Eth
$1,674,561.00
88,694.352 LINK
0.3682%
33
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.92
0.0068685 Eth
$1,601,683.00
87,886.655 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3649%
34
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.08
0.0069308 Eth
$1,526,262.00
47,367.083 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1967%
35
CoinEx
LINK-USDT$17.99
0.0068882 Eth
$1,518,209.00
80,661.114 LINK
0.3349%
36
Coinbase Exchange
LINK-GBP$17.97
0.0068855 Eth
$1,438,530.00
80,072.550 LINK
0.3324%
37
FMCPAY
LINK-ETH$17.91
0.0068664 Eth
$1,195,242.00
65,725.600 LINK
0.2729%
38
FMCPAY
LINK-BTC$17.99
0.0068871 Eth
$1,139,469.00
61,821.400 LINK
0.2567%
39
Phemex
LINK-USDT$17.94
0.0068755 Eth
$996,006.00
55,523.350 LINK
0.2305%
40
EXMO
LINK-USDT$17.94
0.0068757 Eth
$989,771.00
55,180.510 LINK
0.2291%
41
tanX
LINK-USDC$17.96
0.0068830 Eth
$868,253.00
46,836.550 LINK
0.1944%
42
BigONE
LINK-USDT$18.04
0.0068990 Eth
$864,055.00
47,888.560 LINK
0.1988%
43
BitStorage
LINK-USDT$17.98
0.0068835 Eth
$808,768.00
44,979.330 LINK
0.1867%
44
Trubit
LINK-USDT$17.98
0.0068815 Eth
$779,648.00
41,714.280 LINK
0.1732%
45
Gemini
LINK-USD$17.95
0.0068797 Eth
$746,379.00
41,582.183 LINK
0.1726%
46
Binance
LINK-TRY$18.16
0.0069452 Eth
$742,476.00
38,818.360 LINK
0.1612%
47
Binance
LINK-EUR$18.01
0.0068950 Eth
$679,354.00
35,780.500 LINK
0.1485%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.94
0.0068786 Eth
$669,816.00
35,592.935 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1478%
49
Bitbank
LINK-JPY$18.01
0.0068990 Eth
$622,332.00
34,561.447 LINK
0.1435%
50
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.97
0.0068869 Eth
$579,530.00
31,696.909 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1316%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.99
0.0068976 Eth
$536,241.00
28,988.513 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1204%
52
EarnBIT
LINK-USDT$17.97
0.0068786 Eth
$535,242.00
28,484.674 LINK
0.1183%
53
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.96
0.0068863 Eth
$522,447.00
28,568.168 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1186%
54
HashKey Exchange
LINK-USD$18.00
0.0068995 Eth
$476,004.00
24,828.016 LINK
0.1031%
55
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.94
0.0068763 Eth
$404,466.00
21,612.359 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0897%
56
Bybit
LINK-USDC$17.95
0.0068795 Eth
$386,668.00
20,550.498 LINK
0.0853%
57
Coinbase Exchange
LINK-USDT$17.96
0.0068771 Eth
$385,781.00
21,479.573 LINK
0.0892%
58
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.93
0.0068684 Eth
$377,705.00
43,197.787 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1793%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.98
0.0068933 Eth
$355,601.00
19,461.349 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0808%
60
OKX
LINK-USDC$17.94
0.0068764 Eth
$349,144.00
18,498.532 LINK
0.0768%
61
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.96
0.0068852 Eth
$342,753.00
360,032.685 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.4947%
62
Coinbase Exchange
LINK-BTC$17.94
0.0068744 Eth
$291,560.00
16,255.210 LINK
0.0675%
63
Slex
LINK-ETH$17.94
0.0068720 Eth
$287,467.00
15,811.640 LINK
0.0656%
64
BitMart
LINK-BTC$17.95
0.0068760 Eth
$273,288.00
15,228.060 LINK
0.0632%
65
GMO Japan
LINK-JPY$17.96
0.0068865 Eth
$270,131.00
15,036.600 LINK
0.0624%
66
Bitkub
LINK-THB$18.08
0.0069298 Eth
$263,339.00
14,566.563 LINK
0.0605%
67
itBit
LINK-USD$17.94
0.0068713 Eth
$260,470.00
14,518.974 LINK
0.0603%
68
BitDelta
LINK-USDT$17.95
0.0068759 Eth
$258,994.00
13,820.000 LINK
0.0574%
69
Hotcoin
LINK-BTC$17.94
0.0068709 Eth
$243,122.00
13,548.830 LINK
0.0562%
70
BYDFi
LINK-USDC$18.06
0.0069133 Eth
$214,194.00
11,857.550 LINK
0.0492%
71
bitcastle
LINK-USDT$17.93
0.0068683 Eth
$208,403.00
11,052.640 LINK
0.0459%
72
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.89
0.0068575 Eth
$201,119.00
10,709.396 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0445%
73
BitStorage
LINK-ETH$18.01
0.0068941 Eth
$191,139.00
10,610.800 LINK
0.0441%
74
KuCoin
LINK-USDC$18.03
0.0069132 Eth
$186,719.00
10,353.228 LINK
0.0430%
75
Coinbase Exchange
LINK-ETH$17.91
0.0068660 Eth
$178,954.00
9,990.860 LINK
0.0415%
76
PointPay
LINK-BTC$17.95
0.0068783 Eth
$176,616.00
9,469.866 LINK
0.0393%
77
Bitci TR
LINK-TRY$18.06
0.0069133 Eth
$175,560.00
9,362.520 LINK
0.0389%
78
Kraken
LINK-GBP$18.02
0.0069070 Eth
$172,889.00
9,594.965 LINK
0.0398%
79
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.95
0.0068783 Eth
$141,722.00
7,610.217 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0316%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.95
0.0068789 Eth
$134,657.00
7,318.451 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0304%
81
Bitso
LINK-USD$17.96
0.0068850 Eth
$130,867.00
7,284.892 LINK
0.0302%
82
CoinTR
LINK-TRY$18.19
0.0069435 Eth
$129,299.00
6,903.620 LINK
0.0287%
83
WhiteBIT
LINK-BTC$17.97
0.0068844 Eth
$106,282.00
5,914.990 LINK
0.0246%
84
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.10
0.0069363 Eth
$100,348.00
5,638.271 0X5947BB275C521040051D82396192181B413227A3
0.0234%
85
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.00
0.0069001 Eth
$100,342.00
5,491.185 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0228%
86
CoinEx
LINK-USDC$17.95
0.0068786 Eth
$82,745.00
4,477.609 LINK
0.0186%
87
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.94
0.0068763 Eth
$81,430.00
85,016.893 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3530%
88
BitMart
LINK-ETH$17.94
0.0068757 Eth
$76,475.00
4,262.160 LINK
0.0177%
89
EXMO
LINK-BTC$17.97
0.0068880 Eth
$70,816.00
3,940.973 LINK
0.0164%
90
Mercado Bitcoin
LINK-BRL$18.14
0.0069520 Eth
$70,656.00
3,895.950 LINK
0.0162%
91
Hotcoin
LINK-ETH$17.97
0.0068800 Eth
$66,334.00
3,691.040 LINK
0.0153%
92
Binance US
LINK-USDT$17.96
0.0068758 Eth
$54,975.00
3,060.901 LINK
0.0127%
93
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.97
0.0068855 Eth
$49,542.00
2,715.775 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0113%
94
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.92
0.0068689 Eth
$46,591.00
2,499.479 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0104%
95
KuCoin
LINK-BTC$17.93
0.0068715 Eth
$42,742.00
2,384.340 LINK
0.0099%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.97
0.0068880 Eth
$29,442.00
1,592.290 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0066%
97
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.00
0.0068983 Eth
$25,443.00
1,415.504 0X5947BB275C521040051D82396192181B413227A3
0.0059%
98
Dex-Trade
LINK-ETH$18.09
0.0069092 Eth
$24,910.00
1,377.205 LINK
0.0057%
99
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$17.97
0.0068869 Eth
$24,421.00
1,346.777 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0056%
100
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$18.06
0.0069222 Eth
$22,232.00
36.538 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0002%

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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