ETH Price: $2,675.86 (+1.76%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

734,361 ( 0.019%)

Market

Price

$18.71 @ 0.006992 ETH (+0.27%)

Onchain Market Cap

$18,710,000,000.00

Circulating Supply Market Cap

$11,947,626,430.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
3.453128800131261933 LINK

Value
$64.61 ( ~0.024145477262976 Eth) [0.0000%]
0x424856df66248aa5e749fb12286798d36e821d3d
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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 16909.09% |ETH 0.0003846 1717.99%

Market

Volume (24H):$795,699,599.00
Market Capitalization:$11,947,626,430.00
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$18.79
0.0070316 Eth
$106,775,588.00
5,777,917.910 LINK
24.6950%
2
Coinbase Exchange
LINK-USD$18.79
0.0070254 Eth
$38,798,496.00
2,065,287.780 LINK
8.8271%
3
Bybit
LINK-USDT$18.79
0.0070254 Eth
$30,656,095.00
1,650,329.305 LINK
7.0536%
4
HTX
LINK-USDT$18.80
0.0070269 Eth
$20,495,997.00
1,093,317.947 LINK
4.6729%
5
P2B
LINK-USDT$18.77
0.0070265 Eth
$16,492,937.00
878,641.620 LINK
3.7553%
6
WhiteBIT
LINK-USDT$18.77
0.0070240 Eth
$13,995,961.00
745,558.300 LINK
3.1865%
7
DigiFinex
LINK-USDT$18.81
0.0070317 Eth
$13,374,350.00
711,121.160 LINK
3.0394%
8
Gate.io
LINK-USDT$18.79
0.0070264 Eth
$12,466,884.00
675,966.940 LINK
2.8891%
9
OKX
LINK-USDT$18.79
0.0070247 Eth
$11,483,705.00
618,665.253 LINK
2.6442%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$18.70
0.0069976 Eth
$10,737,348.00
575,075.690 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.4579%
11
XT.COM
LINK-USDT$18.74
0.0070199 Eth
$10,663,443.00
577,010.220 LINK
2.4662%
12
Binance
LINK-USDC$18.77
0.0070169 Eth
$9,898,902.00
534,205.010 LINK
2.2832%
13
Coinstore
LINK-USDT$18.77
0.0070244 Eth
$8,530,091.00
460,823.230 LINK
1.9696%
14
Bitunix
LINK-USDT$18.78
0.0070261 Eth
$7,508,892.00
400,035.960 LINK
1.7098%
15
CoinW
LINK-USDT$18.77
0.0070255 Eth
$7,341,276.00
391,035.380 LINK
1.6713%
16
Binance
LINK-FDUSD$18.79
0.0070238 Eth
$6,925,036.00
374,334.360 LINK
1.5999%
17
Hotcoin
LINK-USDT$18.78
0.0070280 Eth
$6,537,976.00
348,124.950 LINK
1.4879%
18
KuCoin
LINK-USDT$18.80
0.0070271 Eth
$6,180,726.00
328,849.378 LINK
1.4055%
19
Azbit
LINK-USDT$18.78
0.0070211 Eth
$6,083,448.00
328,954.548 LINK
1.4060%
20
BYDFi
LINK-USDT$18.76
0.0070214 Eth
$6,069,119.00
323,466.530 LINK
1.3825%
21
Coinbase Exchange
LINK-EUR$18.80
0.0070332 Eth
$5,394,885.00
287,026.420 LINK
1.2268%
22
LATOKEN
LINK-USDT$18.80
0.0070323 Eth
$5,043,223.00
268,326.210 LINK
1.1468%
23
BTSE
LINK-USDT$18.76
0.0070191 Eth
$5,002,582.00
266,701.603 LINK
1.1399%
24
Kraken
LINK-USD$18.80
0.0070273 Eth
$4,891,619.00
260,237.904 LINK
1.1123%
25
QMall
LINK-USDT$18.77
0.0070225 Eth
$4,329,887.00
234,490.046 LINK
1.0022%
26
Dex-Trade
LINK-USDT$18.72
0.0070122 Eth
$3,100,665.00
165,615.400 LINK
0.7078%
27
MEXC
LINK-USDC$18.75
0.0070157 Eth
$2,954,576.00
157,596.380 LINK
0.6736%
28
Coinbase Exchange
LINK-GBP$18.79
0.0070297 Eth
$2,538,015.00
135,098.380 LINK
0.5774%
29
Bitvavo
LINK-EUR$18.72
0.0070198 Eth
$2,268,440.00
121,207.454 LINK
0.5180%
30
FMCPAY
LINK-USDT$18.77
0.0070270 Eth
$2,187,922.00
117,109.550 LINK
0.5005%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.83
0.0070458 Eth
$1,762,134.00
94,238.581 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4028%
32
PointPay
LINK-USDT$18.80
0.0070397 Eth
$1,743,219.00
94,371.821 LINK
0.4033%
33
Biconomy.com
LINK-USDT$18.81
0.0070410 Eth
$1,637,790.00
87,678.900 LINK
0.3747%
34
CoinEx
LINK-USDT$18.77
0.0070224 Eth
$1,591,603.00
85,760.213 LINK
0.3665%
35
Gemini
LINK-USD$18.70
0.0069900 Eth
$1,382,429.00
73,942.679 LINK
0.3160%
36
Bitstamp
LINK-USD$18.79
0.0070252 Eth
$1,297,884.00
69,073.143 LINK
0.2952%
37
FMCPAY
LINK-ETH$18.78
0.0070276 Eth
$1,263,571.00
67,421.280 LINK
0.2882%
38
FMCPAY
LINK-BTC$18.75
0.0070216 Eth
$1,064,238.00
57,234.750 LINK
0.2446%
39
Phemex
LINK-USDT$18.77
0.0070234 Eth
$1,021,383.00
54,411.720 LINK
0.2326%
40
Tokpie
LINK-USDT$18.83
0.0070464 Eth
$1,014,359.00
53,860.965 LINK
0.2302%
41
BigONE
LINK-USDT$18.77
0.0070409 Eth
$971,355.00
51,750.160 LINK
0.2212%
42
Bitbank
LINK-JPY$18.82
0.0070430 Eth
$969,630.00
51,519.767 LINK
0.2202%
43
EXMO
LINK-USDT$18.79
0.0070246 Eth
$897,894.00
47,787.206 LINK
0.2042%
44
LATOKEN
LINK-BTC$18.79
0.0070293 Eth
$851,122.00
45,305.947 LINK
0.1936%
45
Binance
LINK-TRY$18.78
0.0070233 Eth
$849,686.00
45,703.250 LINK
0.1953%
46
Trubit
LINK-USDT$18.71
0.0070193 Eth
$836,692.00
44,702.310 LINK
0.1911%
47
BitStorage
LINK-USDT$18.72
0.0070223 Eth
$820,072.00
43,804.320 LINK
0.1872%
48
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.84
0.0070499 Eth
$819,791.00
43,811.317 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1873%
49
WhiteBIT
LINK-BTC$18.77
0.0070246 Eth
$775,432.00
41,303.370 LINK
0.1765%
50
QMall
LINK-USDC$18.78
0.0070313 Eth
$769,314.00
41,499.891 LINK
0.1774%
51
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.78
0.0070270 Eth
$668,619.00
34,403.597 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1470%
52
tanX
LINK-USDC$18.75
0.0070169 Eth
$660,306.00
35,099.100 LINK
0.1500%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.77
0.0070180 Eth
$617,568.00
32,851.258 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1404%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.79
0.0070256 Eth
$589,703.00
31,516.049 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1347%
55
Bybit
LINK-USDC$18.71
0.0069945 Eth
$568,495.00
30,877.243 LINK
0.1320%
56
EarnBIT
LINK-USDT$18.81
0.0070383 Eth
$559,156.00
30,083.247 LINK
0.1286%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.79
0.0070256 Eth
$538,977.00
28,717.433 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1227%
58
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.81
0.0070391 Eth
$532,783.00
28,939.097 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1237%
59
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.70
0.0069976 Eth
$481,442.00
49,773.659 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2127%
60
Binance
LINK-EUR$18.66
0.0069985 Eth
$457,603.00
24,766.720 LINK
0.1059%
61
OKX
LINK-USDC$18.80
0.0070273 Eth
$453,535.00
24,619.574 LINK
0.1052%
62
Coinbase Exchange
LINK-USDT$18.64
0.0069756 Eth
$435,965.00
23,385.722 LINK
0.1000%
63
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.79
0.0070256 Eth
$421,665.00
417,950.724 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7863%
64
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.81
0.0070393 Eth
$361,154.00
19,304.959 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0825%
65
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.79
0.0070306 Eth
$301,785.00
16,311.341 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0697%
66
Bitbegin
LINK-USDT$18.79
0.0070259 Eth
$288,772.00
15,299.460 LINK
0.0654%
67
BitMart
LINK-BTC$18.78
0.0070282 Eth
$265,636.00
14,143.960 LINK
0.0605%
68
BitDelta
LINK-USDT$18.77
0.0070242 Eth
$259,026.00
13,890.000 LINK
0.0594%
69
Hotcoin
LINK-BTC$18.79
0.0070255 Eth
$253,881.00
13,510.220 LINK
0.0577%
70
itBit
LINK-USD$18.76
0.0070198 Eth
$248,170.00
13,228.689 LINK
0.0565%
71
BYDFi
LINK-USDC$18.71
0.0069945 Eth
$232,395.00
12,422.340 LINK
0.0531%
72
Bitkub
LINK-THB$18.79
0.0070262 Eth
$228,267.00
12,145.973 LINK
0.0519%
73
GMO Japan
LINK-JPY$18.88
0.0070852 Eth
$214,713.00
11,372.300 LINK
0.0486%
74
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.78
0.0070261 Eth
$203,129.00
10,926.489 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0467%
75
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$18.73
0.0070078 Eth
$200,745.00
10,969.033 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0469%
76
Slex
LINK-ETH$18.71
0.0070202 Eth
$173,101.00
9,282.330 LINK
0.0397%
77
Bitso
LINK-USD$18.68
0.0070155 Eth
$172,407.00
9,229.690 LINK
0.0394%
78
BitStorage
LINK-ETH$18.84
0.0070464 Eth
$160,619.00
8,525.450 LINK
0.0364%
79
CoinTR
LINK-TRY$18.70
0.0070111 Eth
$151,086.00
8,063.580 LINK
0.0345%
80
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.83
0.0070458 Eth
$145,846.00
143,128.106 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.6117%
81
Coinbase Exchange
LINK-BTC$18.73
0.0070010 Eth
$138,352.00
7,388.070 LINK
0.0316%
82
KuCoin
LINK-USDC$18.81
0.0070334 Eth
$128,526.00
6,832.120 LINK
0.0292%
83
Kraken
LINK-GBP$18.72
0.0070006 Eth
$117,851.00
6,295.564 LINK
0.0269%
84
Binance
LINK-BNB$18.67
0.0070034 Eth
$115,508.00
6,016.868 LINK
0.0257%
85
KuCoin
LINK-BTC$18.72
0.0070007 Eth
$114,504.00
6,115.180 LINK
0.0261%
86
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.63
0.0069707 Eth
$112,636.00
6,055.138 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0259%
87
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.70
0.0069983 Eth
$108,017.00
107,593.797 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4599%
88
Binance US
LINK-USDT$18.73
0.0070093 Eth
$104,437.00
5,575.619 LINK
0.0238%
89
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$18.57
0.0069501 Eth
$104,375.00
5,470.461 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0234%
90
WhiteBIT
LINK-TRY$18.73
0.0070111 Eth
$103,149.00
5,508.460 LINK
0.0235%
91
Coinbase Exchange
LINK-ETH$18.71
0.0070026 Eth
$91,173.00
4,872.200 LINK
0.0208%
92
BitMart
LINK-ETH$18.79
0.0070250 Eth
$84,377.00
4,490.420 LINK
0.0192%
93
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.73
0.0070100 Eth
$77,939.00
4,178.847 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0179%
94
Hotcoin
LINK-ETH$18.75
0.0070155 Eth
$72,876.00
3,886.580 LINK
0.0166%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$18.88
0.0070574 Eth
$66,250.00
3,519.398 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0150%
96
Mercado Bitcoin
LINK-BRL$18.70
0.0069972 Eth
$63,694.00
3,405.985 LINK
0.0146%
97
Indodax
LINK-IDR$18.74
0.0070077 Eth
$46,526.00
2,482.156 LINK
0.0106%
98
Bitstamp
LINK-GBP$18.77
0.0070175 Eth
$42,939.00
2,287.676 LINK
0.0098%
99
Bitexen
LINK-TRY$18.66
0.0069970 Eth
$37,426.00
2,006.152 LINK
0.0086%
100
Dex-Trade
LINK-ETH$18.77
0.0070239 Eth
$20,861.00
1,111.320 LINK
0.0047%

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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