ETH Price: $3,150.33 (+1.21%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

732,211 (0.00%)

Market

Price

$23.96 @ 0.007606 ETH (+3.41%)

Onchain Market Cap

$23,960,000,000.00

Circulating Supply Market Cap

$15,295,522,055.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
173.062636974263455 LINK

Value
$4,146.58 ( ~1.3162 Eth) [0.0000%]
0x7574dc130B1D5191b9c8a8506916280D83B3E160
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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 21681.82% |ETH 0.0003846 1877.64%

Market

Volume (24H):$969,341,279.00
Market Capitalization:$15,295,522,055.00
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
Coinbase Exchange
LINK-USD$24.08
0.0076430 Eth
$65,585,656.00
2,723,543.690 LINK
14.1534%
2
Bybit
LINK-USDT$24.07
0.0076399 Eth
$50,589,365.00
2,171,103.402 LINK
11.2825%
3
OKX
LINK-USDT$24.07
0.0076400 Eth
$26,303,917.00
1,139,965.471 LINK
5.9240%
4
P2B
LINK-USDT$24.10
0.0076453 Eth
$21,639,131.00
897,980.060 LINK
4.6665%
5
DigiFinex
LINK-USDT$24.08
0.0076428 Eth
$17,695,924.00
734,932.630 LINK
3.8192%
6
Gate.io
LINK-USDT$24.07
0.0076388 Eth
$17,259,152.00
739,270.400 LINK
3.8417%
7
MEXC
LINK-USDT$24.12
0.0076518 Eth
$14,502,762.00
601,278.160 LINK
3.1246%
8
HTX
LINK-USDT$24.08
0.0076385 Eth
$13,944,848.00
598,269.980 LINK
3.1090%
9
XT.COM
LINK-USDT$24.06
0.0076379 Eth
$12,398,700.00
530,995.460 LINK
2.7594%
10
Azbit
LINK-USDT$24.08
0.0076391 Eth
$12,176,047.00
521,217.042 LINK
2.7086%
11
Binance
LINK-FDUSD$23.95
0.0076229 Eth
$10,715,117.00
459,227.270 LINK
2.3865%
12
Kraken
LINK-USD$24.09
0.0076468 Eth
$10,639,286.00
441,596.454 LINK
2.2948%
13
Bitunix
LINK-USDT$24.11
0.0076470 Eth
$10,546,504.00
437,611.610 LINK
2.2741%
14
Coinstore
LINK-USDT$24.03
0.0076310 Eth
$10,133,500.00
433,994.980 LINK
2.2553%
15
Binance
LINK-USDC$23.92
0.0076089 Eth
$9,826,124.00
418,893.070 LINK
2.1768%
16
KuCoin
LINK-USDT$24.07
0.0076386 Eth
$9,760,976.00
405,573.423 LINK
2.1076%
17
CoinW
LINK-USDT$24.06
0.0076417 Eth
$8,457,171.00
351,494.420 LINK
1.8266%
18
BYDFi
LINK-USDT$24.13
0.0076550 Eth
$7,228,988.00
299,583.100 LINK
1.5568%
19
Coinbase Exchange
LINK-EUR$24.10
0.0076532 Eth
$7,221,601.00
299,647.400 LINK
1.5572%
20
BTSE
LINK-USDT$23.94
0.0076358 Eth
$6,491,687.00
271,130.711 LINK
1.4090%
21
LBank
LINK-USDT$24.05
0.0076381 Eth
$6,255,420.00
260,125.270 LINK
1.3518%
22
LATOKEN
LINK-USDT$24.06
0.0076408 Eth
$6,155,933.00
255,880.857 LINK
1.3297%
23
QMall
LINK-USDT$24.09
0.0076450 Eth
$5,219,827.00
223,403.726 LINK
1.1610%
24
WhiteBIT
LINK-USDT$23.95
0.0076074 Eth
$4,879,183.00
203,749.670 LINK
1.0588%
25
Bitvavo
LINK-EUR$24.03
0.0076340 Eth
$4,859,330.00
202,188.897 LINK
1.0507%
26
Dex-Trade
LINK-USDT$24.06
0.0076423 Eth
$3,796,549.00
157,815.140 LINK
0.8201%
27
FMCPAY
LINK-USDT$24.09
0.0076427 Eth
$3,577,432.00
153,473.836 LINK
0.7976%
28
Biconomy.com
LINK-USDT$24.01
0.0076287 Eth
$3,388,036.00
146,772.490 LINK
0.7627%
29
CoinEx
LINK-USDT$24.10
0.0076495 Eth
$2,528,282.00
108,729.971 LINK
0.5650%
30
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.90
0.0075815 Eth
$2,314,610.00
98,410.571 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5114%
31
PointPay
LINK-USDT$24.11
0.0076486 Eth
$2,094,172.00
89,584.347 LINK
0.4655%
32
Coinbase Exchange
LINK-GBP$24.07
0.0076436 Eth
$2,037,421.00
84,644.890 LINK
0.4399%
33
WhiteBIT
LINK-TRY$24.15
0.0076621 Eth
$2,029,385.00
84,024.480 LINK
0.4366%
34
Phemex
LINK-USDT$24.09
0.0076421 Eth
$1,768,231.00
73,408.440 LINK
0.3815%
35
FMCPAY
LINK-ETH$24.08
0.0076446 Eth
$1,703,464.00
72,374.880 LINK
0.3761%
36
FMCPAY
LINK-BTC$23.97
0.0076408 Eth
$1,454,721.00
61,659.700 LINK
0.3204%
37
Kraken
LINK-EUR$23.98
0.0076099 Eth
$1,408,432.00
58,742.107 LINK
0.3053%
38
OKX
LINK-USDC$24.12
0.0076565 Eth
$1,338,129.00
57,630.701 LINK
0.2995%
39
EarnBIT
LINK-USDT$24.07
0.0076470 Eth
$1,298,759.00
56,198.596 LINK
0.2920%
40
Binance
LINK-TRY$24.07
0.0076400 Eth
$1,204,153.00
51,591.670 LINK
0.2681%
41
Tokpie
LINK-USDT$24.02
0.0076296 Eth
$1,203,594.00
50,114.410 LINK
0.2604%
42
WhiteBIT
LINK-BTC$24.14
0.0076569 Eth
$1,177,484.00
48,785.520 LINK
0.2535%
43
EXMO
LINK-USDT$24.12
0.0076569 Eth
$1,159,888.00
48,079.082 LINK
0.2499%
44
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.86
0.0075776 Eth
$1,132,373.00
93,684.124 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.4868%
45
Bitbank
LINK-JPY$24.15
0.0076610 Eth
$1,082,516.00
44,832.077 LINK
0.2330%
46
tanX
LINK-USDC$24.07
0.0076410 Eth
$1,039,451.00
44,761.150 LINK
0.2326%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.04
0.0076268 Eth
$1,018,595.00
43,030.812 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2236%
48
WhiteBIT
LINK-EUR$24.07
0.0076398 Eth
$995,159.00
41,342.990 LINK
0.2148%
49
BigONE
LINK-USDT$23.98
0.0076161 Eth
$954,203.00
39,794.240 LINK
0.2068%
50
Binance
LINK-EUR$23.95
0.0076236 Eth
$950,430.00
40,690.210 LINK
0.2115%
51
BitStorage
LINK-USDT$24.04
0.0076360 Eth
$919,474.00
38,252.520 LINK
0.1988%
52
Trubit
LINK-USDT$24.12
0.0076516 Eth
$860,074.00
36,909.450 LINK
0.1918%
53
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.97
0.0076062 Eth
$857,155.00
36,820.917 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1913%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.05
0.0076303 Eth
$801,306.00
34,011.776 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1767%
55
Coinbase Exchange
LINK-USDT$23.95
0.0076029 Eth
$790,139.00
32,987.545 LINK
0.1714%
56
QMall
LINK-USDC$24.13
0.0076541 Eth
$771,131.00
32,872.112 LINK
0.1708%
57
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.09
0.0076436 Eth
$751,829.00
729,709.532 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.7921%
58
Bybit
LINK-USDC$24.09
0.0076479 Eth
$710,468.00
30,643.223 LINK
0.1592%
59
Gemini
LINK-USD$24.11
0.0076542 Eth
$679,969.00
28,198.066 LINK
0.1465%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.08
0.0076391 Eth
$548,186.00
23,236.864 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1208%
61
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.07
0.0076365 Eth
$534,268.00
22,552.719 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1172%
62
LATOKEN
LINK-BTC$24.01
0.0076265 Eth
$526,017.00
21,905.870 LINK
0.1138%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$24.04
0.0076268 Eth
$523,879.00
22,446.174 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1166%
64
itBit
LINK-USD$24.04
0.0076366 Eth
$518,857.00
21,583.082 LINK
0.1122%
65
Coinbase Exchange
LINK-BTC$24.09
0.0076423 Eth
$474,170.00
19,684.720 LINK
0.1023%
66
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.04
0.0076261 Eth
$468,971.00
19,920.386 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1035%
67
ProBit Global
LINK-BTC$24.04
0.0076361 Eth
$441,305.00
18,356.026 LINK
0.0954%
68
Coinbase Exchange
LINK-ETH$24.07
0.0076462 Eth
$355,444.00
14,765.160 LINK
0.0767%
69
ProBit Global
LINK-USDT$24.00
0.0076245 Eth
$354,326.00
14,760.610 LINK
0.0767%
70
BitDelta
LINK-USDT$23.93
0.0076100 Eth
$336,730.00
14,444.000 LINK
0.0751%
71
GMO Japan
LINK-JPY$24.09
0.0076444 Eth
$304,226.00
12,626.700 LINK
0.0656%
72
HashKey Exchange
LINK-USD$24.03
0.0076238 Eth
$297,750.00
12,758.721 LINK
0.0663%
73
BitMart
LINK-BTC$24.13
0.0076548 Eth
$294,664.00
12,213.300 LINK
0.0635%
74
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.93
0.0075995 Eth
$285,090.00
12,230.639 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0636%
75
Hotcoin
LINK-BTC$24.06
0.0076423 Eth
$234,883.00
9,761.410 LINK
0.0507%
76
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.96
0.0076088 Eth
$232,983.00
9,867.241 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0513%
77
Slex
LINK-ETH$24.02
0.0076293 Eth
$226,816.00
9,627.740 LINK
0.0500%
78
Bitso
LINK-USD$23.92
0.0075962 Eth
$223,820.00
9,355.648 LINK
0.0486%
79
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.14
0.0076619 Eth
$214,207.00
9,107.001 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0473%
80
KuCoin
LINK-USDC$24.12
0.0076562 Eth
$207,751.00
8,612.324 LINK
0.0448%
81
PointPay
LINK-BTC$24.10
0.0076453 Eth
$204,350.00
8,634.367 LINK
0.0449%
82
BitStorage
LINK-ETH$23.94
0.0076226 Eth
$204,110.00
8,524.810 LINK
0.0443%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.87
0.0075804 Eth
$193,078.00
187,623.696 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.9750%
84
BYDFi
LINK-USDC$23.92
0.0076126 Eth
$190,375.00
7,957.800 LINK
0.0414%
85
CoinTR
LINK-TRY$24.10
0.0076532 Eth
$175,711.00
7,540.880 LINK
0.0392%
86
Binance
LINK-BRL$23.81
0.0075787 Eth
$174,377.00
7,471.320 LINK
0.0388%
87
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.99
0.0076110 Eth
$173,226.00
168,646.301 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.8764%
88
Mercado Bitcoin
LINK-BRL$23.82
0.0075577 Eth
$163,413.00
6,860.146 LINK
0.0356%
89
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.07
0.0076365 Eth
$161,259.00
6,834.431 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0355%
90
Bitkub
LINK-THB$23.96
0.0076282 Eth
$139,357.00
5,815.544 LINK
0.0302%
91
Kraken
LINK-GBP$24.13
0.0076597 Eth
$138,945.00
5,757.360 LINK
0.0299%
92
Binance US
LINK-USDT$24.00
0.0076139 Eth
$110,254.00
4,594.336 LINK
0.0239%
93
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.87
0.0075804 Eth
$104,972.00
4,468.393 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0232%
94
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.94
0.0075978 Eth
$101,859.00
4,354.930 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0226%
95
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$24.27
0.0077060 Eth
$100,582.00
4,169.933 0X5947BB275C521040051D82396192181B413227A3
0.0217%
96
BitMart
LINK-ETH$24.13
0.0076546 Eth
$92,972.00
3,853.600 LINK
0.0200%
97
Hotcoin
LINK-ETH$24.04
0.0076373 Eth
$68,406.00
2,845.240 LINK
0.0148%
98
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$24.06
0.0076329 Eth
$65,958.00
87.751 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0005%
99
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.93
0.0076004 Eth
$62,492.00
2,676.212 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0139%
100
Dex-Trade
LINK-ETH$23.96
0.0076335 Eth
$31,548.00
1,316.650 LINK
0.0068%

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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