ETH Price: $2,630.39 (-3.56%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

737,844 ( 0.101%)

Market

Price

$17.18 @ 0.006531 ETH (-5.83%)

Onchain Market Cap

$17,180,000,000.00

Circulating Supply Market Cap

$10,968,640,590.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x47f3c1d0bbeee8887946c47413dab200591b7fdf
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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 15518.18% |ETH 0.0003846 1598.13%

Market

Volume (24H):$746,118,562.00
Market Capitalization:$10,968,640,590.00
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
WhiteBIT
LINK-USDT$17.24
0.0065447 Eth
$79,915,464.00
4,635,658.700 LINK
15.0577%
2
Binance
LINK-USDT$17.14
0.0065207 Eth
$78,977,619.00
4,341,611.330 LINK
14.1026%
3
Bybit
LINK-USDT$17.00
0.0064787 Eth
$56,395,540.00
3,125,212.129 LINK
10.1514%
4
MEXC
LINK-USDT$17.12
0.0065153 Eth
$41,189,893.00
2,405,744.510 LINK
7.8144%
5
Coinbase Exchange
LINK-USD$17.13
0.0065197 Eth
$27,913,503.00
1,629,224.490 LINK
5.2921%
6
Bitget
LINK-USDT$17.12
0.0065252 Eth
$25,857,852.00
1,429,740.853 LINK
4.6441%
7
HTX
LINK-USDT$17.13
0.0065286 Eth
$18,827,316.00
1,034,679.557 LINK
3.3609%
8
P2B
LINK-USDT$17.15
0.0065265 Eth
$13,506,605.00
787,416.230 LINK
2.5577%
9
Gate.io
LINK-USDT$17.12
0.0065235 Eth
$11,237,494.00
615,636.740 LINK
1.9997%
10
OKX
LINK-USDT$17.16
0.0065409 Eth
$10,498,616.00
580,246.445 LINK
1.8848%
11
DigiFinex
LINK-USDT$17.12
0.0065253 Eth
$9,439,295.00
551,236.030 LINK
1.7905%
12
Slex
LINK-USDT$17.17
0.0065343 Eth
$8,685,007.00
474,925.150 LINK
1.5427%
13
KuCoin
LINK-USDT$17.12
0.0065227 Eth
$8,106,037.00
473,500.376 LINK
1.5380%
14
XT.COM
LINK-USDT$17.18
0.0065335 Eth
$7,778,396.00
428,008.120 LINK
1.3903%
15
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.16
0.0065383 Eth
$7,249,221.00
414,672.146 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.3470%
16
MEXC
LINK-EUR$17.15
0.0065401 Eth
$7,120,184.00
415,082.400 LINK
1.3483%
17
Hotcoin
LINK-USDT$17.11
0.0065210 Eth
$7,024,400.00
410,468.300 LINK
1.3333%
18
MEXC
LINK-USDC$17.15
0.0065342 Eth
$6,856,918.00
399,886.030 LINK
1.2989%
19
Coinstore
LINK-USDT$17.12
0.0065272 Eth
$6,685,197.00
367,865.230 LINK
1.1949%
20
LBank
LINK-USDT$17.11
0.0065115 Eth
$6,671,586.00
389,889.370 LINK
1.2665%
21
Binance
LINK-FDUSD$17.17
0.0065276 Eth
$6,230,458.00
341,496.550 LINK
1.1093%
22
Kraken
LINK-USD$17.13
0.0065281 Eth
$6,002,293.00
350,360.749 LINK
1.1381%
23
Binance
LINK-USDC$17.23
0.0065431 Eth
$5,951,874.00
327,415.080 LINK
1.0635%
24
CoinW
LINK-USDT$17.18
0.0065318 Eth
$5,540,459.00
322,449.990 LINK
1.0474%
25
Bitunix
LINK-USDT$17.13
0.0065193 Eth
$4,959,890.00
289,474.700 LINK
0.9403%
26
Azbit
LINK-USDT$17.15
0.0065433 Eth
$4,703,337.00
258,563.308 LINK
0.8399%
27
BTSE
LINK-USDT$17.13
0.0065212 Eth
$4,208,711.00
245,633.574 LINK
0.7979%
28
BYDFi
LINK-USDT$17.18
0.0065332 Eth
$4,180,490.00
243,303.420 LINK
0.7903%
29
LATOKEN
LINK-USDT$17.12
0.0065216 Eth
$3,615,816.00
211,237.017 LINK
0.6861%
30
QMall
LINK-USDT$17.14
0.0065299 Eth
$3,265,978.00
179,720.316 LINK
0.5838%
31
Bitvavo
LINK-EUR$17.17
0.0065332 Eth
$3,058,413.00
178,097.303 LINK
0.5785%
32
FMCPAY
LINK-USDT$17.18
0.0065332 Eth
$2,486,170.00
136,740.893 LINK
0.4442%
33
Dex-Trade
LINK-USDT$17.15
0.0065223 Eth
$2,306,104.00
134,488.127 LINK
0.4368%
34
Coinbase Exchange
LINK-GBP$17.14
0.0065286 Eth
$2,138,716.00
124,811.790 LINK
0.4054%
35
CoinEx
LINK-USDT$17.27
0.0065581 Eth
$1,836,048.00
102,609.666 LINK
0.3333%
36
Biconomy.com
LINK-USDT$17.18
0.0065259 Eth
$1,604,567.00
88,373.880 LINK
0.2871%
37
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.13
0.0065280 Eth
$1,553,057.00
89,125.564 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2895%
38
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.21
0.0065568 Eth
$1,475,911.00
84,314.651 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2739%
39
Coinbase Exchange
LINK-EUR$17.16
0.0065406 Eth
$1,338,933.00
78,011.390 LINK
0.2534%
40
PointPay
LINK-USDT$17.18
0.0065337 Eth
$1,284,112.00
70,611.762 LINK
0.2294%
41
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.13
0.0065301 Eth
$1,208,701.00
69,530.902 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2259%
42
FMCPAY
LINK-ETH$17.25
0.0065539 Eth
$1,046,062.00
59,794.560 LINK
0.1942%
43
FMCPAY
LINK-BTC$17.19
0.0065338 Eth
$1,017,790.00
57,494.600 LINK
0.1868%
44
BigONE
LINK-USDT$17.09
0.0065106 Eth
$912,774.00
53,417.250 LINK
0.1735%
45
Trubit
LINK-USDT$17.12
0.0065234 Eth
$805,261.00
44,181.760 LINK
0.1435%
46
Phemex
LINK-USDT$17.13
0.0065212 Eth
$767,645.00
44,802.150 LINK
0.1455%
47
tanX
LINK-USDC$17.22
0.0065467 Eth
$762,602.00
41,776.150 LINK
0.1357%
48
Gemini
LINK-USD$17.16
0.0065375 Eth
$699,650.00
40,781.633 LINK
0.1325%
49
EXMO
LINK-USDT$17.12
0.0065235 Eth
$689,913.00
40,295.405 LINK
0.1309%
50
LATOKEN
LINK-BTC$17.13
0.0065265 Eth
$671,938.00
39,225.255 LINK
0.1274%
51
Binance
LINK-TRY$17.28
0.0065678 Eth
$659,003.00
36,235.000 LINK
0.1177%
52
WhiteBIT
LINK-BTC$17.14
0.0065354 Eth
$650,551.00
37,944.700 LINK
0.1233%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.13
0.0065315 Eth
$631,806.00
34,797.963 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1130%
54
BitStorage
LINK-USDT$17.30
0.0065690 Eth
$604,940.00
34,974.560 LINK
0.1136%
55
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.16
0.0065413 Eth
$550,441.00
587,252.209 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.9075%
56
EarnBIT
LINK-USDT$17.20
0.0065418 Eth
$511,692.00
28,257.729 LINK
0.0918%
57
Bitbank
LINK-JPY$17.24
0.0065602 Eth
$507,248.00
29,416.106 LINK
0.0956%
58
Bybit
LINK-USDC$17.02
0.0064866 Eth
$506,472.00
28,162.794 LINK
0.0915%
59
QMall
LINK-USDC$17.14
0.0065305 Eth
$498,088.00
27,414.512 LINK
0.0890%
60
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.15
0.0065367 Eth
$497,077.00
28,953.830 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0940%
61
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.33
0.0066041 Eth
$467,409.00
53,403.245 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1735%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.14
0.0065354 Eth
$433,117.00
24,830.849 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0807%
63
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.15
0.0065391 Eth
$401,733.00
22,108.208 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0718%
64
BitMart
LINK-BTC$17.13
0.0065268 Eth
$286,920.00
16,751.620 LINK
0.0544%
65
Mercado Bitcoin
LINK-BRL$17.22
0.0065620 Eth
$247,936.00
14,396.188 LINK
0.0468%
66
Hotcoin
LINK-BTC$17.14
0.0065302 Eth
$247,326.00
14,429.990 LINK
0.0469%
67
itBit
LINK-USD$17.15
0.0065353 Eth
$246,374.00
14,365.814 LINK
0.0467%
68
Coinbase Exchange
LINK-BTC$17.14
0.0065303 Eth
$237,055.00
13,833.640 LINK
0.0449%
69
BYDFi
LINK-USDC$17.07
0.0064851 Eth
$220,735.00
12,930.190 LINK
0.0420%
70
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.12
0.0065241 Eth
$217,831.00
11,987.921 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0389%
71
BitDelta
LINK-USDT$17.19
0.0065370 Eth
$216,798.00
11,925.000 LINK
0.0387%
72
BitStorage
LINK-ETH$17.17
0.0065324 Eth
$206,848.00
12,044.470 LINK
0.0391%
73
Bitkub
LINK-THB$17.28
0.0065872 Eth
$202,311.00
11,707.454 LINK
0.0380%
74
OKX
LINK-USDC$17.12
0.0065263 Eth
$198,638.00
10,987.386 LINK
0.0357%
75
Bitci TR
LINK-TRY$17.31
0.0065961 Eth
$179,715.00
9,866.100 LINK
0.0320%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.17
0.0065445 Eth
$178,272.00
10,225.616 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0332%
77
Bitbegin
LINK-USDT$17.18
0.0065449 Eth
$163,858.00
9,011.553 LINK
0.0293%
78
bitcastle
LINK-USDT$17.11
0.0065177 Eth
$161,255.00
8,887.220 LINK
0.0289%
79
WhiteBIT
LINK-TRY$17.30
0.0065751 Eth
$158,824.00
9,182.560 LINK
0.0298%
80
Slex
LINK-ETH$17.18
0.0065375 Eth
$153,247.00
8,781.800 LINK
0.0285%
81
KuCoin
LINK-USDC$17.12
0.0065241 Eth
$130,681.00
7,631.983 LINK
0.0248%
82
Foxbit
LINK-BRL$17.23
0.0065655 Eth
$121,231.00
6,745.845 LINK
0.0219%
83
Binance US
LINK-USDT$17.13
0.0065280 Eth
$118,279.00
6,903.468 LINK
0.0224%
84
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.17
0.0065424 Eth
$113,423.00
121,252.290 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3939%
85
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.13
0.0065280 Eth
$108,729.00
115,590.925 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3755%
86
Bitso
LINK-USD$17.32
0.0065841 Eth
$108,368.00
6,258.148 LINK
0.0203%
87
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.38
0.0066238 Eth
$104,659.00
5,993.731 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0195%
88
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.16
0.0065382 Eth
$99,088.00
5,681.973 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0185%
89
BitMart
LINK-ETH$17.16
0.0065372 Eth
$94,296.00
5,496.500 LINK
0.0179%
90
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.14
0.0065355 Eth
$92,000.00
5,210.975 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0169%
91
Hotcoin
LINK-ETH$17.16
0.0065264 Eth
$71,718.00
4,178.270 LINK
0.0136%
92
KuCoin
LINK-BTC$17.11
0.0065194 Eth
$71,239.00
4,163.430 LINK
0.0135%
93
Kanga
LINK-PLN$17.23
0.0065589 Eth
$63,832.00
0.000 LINK
0.0000%
94
Coinbase Exchange
LINK-ETH$17.40
0.0066281 Eth
$54,393.00
3,126.640 LINK
0.0102%
95
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$17.16
0.0065383 Eth
$45,670.00
2,519.278 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0082%
96
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.18
0.0065467 Eth
$42,445.00
44,947.644 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.1460%
97
Bitexen
LINK-TRY$17.07
0.0065133 Eth
$32,363.00
1,895.740 LINK
0.0062%
98
Upbit
LINK-BTC$17.16
0.0065377 Eth
$28,482.00
1,660.168 LINK
0.0054%
99
Dex-Trade
LINK-ETH$17.14
0.0065194 Eth
$27,224.00
1,588.350 LINK
0.0052%
100
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$17.14
0.0065354 Eth
$20,682.00
1,138.965 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0037%

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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