ETH Price: $3,218.36 (+3.24%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

731,876 ( -0.045%)

Market

Price

$24.25 @ 0.007535 ETH (+3.57%)

Onchain Market Cap

$24,250,000,000.00

Circulating Supply Market Cap

$15,472,834,701.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
570.8 LINK

Value
$13,841.90 ( ~4.3009 Eth) [0.0001%]
0xfeac6c8d1ffbd113b1c3b329dc5e6d96b3be2e73
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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 21945.45% |ETH 0.0003846 1859.18%

Market

Volume (24H):$1,043,915,011.00
Market Capitalization:$15,472,834,701.00
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$24.28
0.0075449 Eth
$70,988,089.00
2,924,088.190 LINK
13.8267%
2
Bybit
LINK-USDT$24.30
0.0075538 Eth
$54,031,028.00
2,292,757.557 LINK
10.8414%
3
OKX
LINK-USDT$24.26
0.0075417 Eth
$27,946,380.00
1,201,901.106 LINK
5.6833%
4
P2B
LINK-USDT$24.27
0.0075542 Eth
$24,108,611.00
993,523.900 LINK
4.6979%
5
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$24.26
0.0075491 Eth
$19,526,874.00
808,260.199 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.8219%
6
DigiFinex
LINK-USDT$24.27
0.0075426 Eth
$19,154,001.00
789,324.190 LINK
3.7324%
7
Gate.io
LINK-USDT$24.30
0.0075552 Eth
$17,620,624.00
747,211.080 LINK
3.5332%
8
MEXC
LINK-USDT$24.29
0.0075513 Eth
$15,346,598.00
631,691.820 LINK
2.9870%
9
HTX
LINK-USDT$24.28
0.0075462 Eth
$14,960,171.00
630,021.120 LINK
2.9791%
10
XT.COM
LINK-USDT$24.28
0.0075529 Eth
$13,564,753.00
574,461.300 LINK
2.7164%
11
Azbit
LINK-USDT$24.24
0.0075416 Eth
$13,228,563.00
560,368.935 LINK
2.6497%
12
Binance
LINK-FDUSD$24.34
0.0075658 Eth
$11,897,367.00
502,403.410 LINK
2.3756%
13
Bitunix
LINK-USDT$24.25
0.0075483 Eth
$11,404,755.00
470,155.940 LINK
2.2232%
14
Coinstore
LINK-USDT$24.37
0.0075761 Eth
$11,093,027.00
469,320.920 LINK
2.2192%
15
Binance
LINK-USDC$24.29
0.0075560 Eth
$10,687,719.00
451,867.540 LINK
2.1367%
16
KuCoin
LINK-USDT$24.31
0.0075563 Eth
$10,592,391.00
435,793.436 LINK
2.0607%
17
Kraken
LINK-USD$24.27
0.0075465 Eth
$10,361,961.00
426,868.375 LINK
2.0185%
18
CoinW
LINK-USDT$24.27
0.0075567 Eth
$9,297,761.00
383,022.590 LINK
1.8111%
19
BYDFi
LINK-USDT$24.28
0.0075560 Eth
$7,875,172.00
324,383.040 LINK
1.5339%
20
Coinbase Exchange
LINK-EUR$24.28
0.0075555 Eth
$7,601,517.00
313,122.560 LINK
1.4806%
21
BTSE
LINK-USDT$24.28
0.0075555 Eth
$6,869,104.00
282,948.059 LINK
1.3379%
22
LBank
LINK-USDT$24.28
0.0075529 Eth
$6,847,406.00
282,055.010 LINK
1.3337%
23
LATOKEN
LINK-USDT$24.28
0.0075464 Eth
$6,726,631.00
277,059.792 LINK
1.3101%
24
QMall
LINK-USDT$24.27
0.0075552 Eth
$5,683,903.00
240,618.556 LINK
1.1378%
25
Bitvavo
LINK-EUR$24.26
0.0075503 Eth
$5,409,351.00
222,985.021 LINK
1.0544%
26
WhiteBIT
LINK-USDT$24.28
0.0075524 Eth
$4,717,093.00
194,317.800 LINK
0.9188%
27
Dex-Trade
LINK-USDT$24.24
0.0075434 Eth
$4,171,140.00
172,100.460 LINK
0.8138%
28
FMCPAY
LINK-USDT$24.24
0.0075422 Eth
$3,825,972.00
161,526.502 LINK
0.7638%
29
Biconomy.com
LINK-USDT$24.28
0.0075534 Eth
$3,562,775.00
152,702.950 LINK
0.7221%
30
CoinEx
LINK-USDT$24.25
0.0075475 Eth
$2,692,124.00
114,434.510 LINK
0.5411%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.23
0.0075374 Eth
$2,511,242.00
104,251.936 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4930%
32
Coinbase Exchange
LINK-GBP$24.27
0.0075536 Eth
$2,303,088.00
94,893.350 LINK
0.4487%
33
PointPay
LINK-USDT$24.28
0.0075561 Eth
$2,283,857.00
96,678.650 LINK
0.4572%
34
Phemex
LINK-USDT$24.29
0.0075495 Eth
$1,983,887.00
81,679.680 LINK
0.3862%
35
WhiteBIT
LINK-TRY$24.28
0.0075531 Eth
$1,842,956.00
75,912.060 LINK
0.3590%
36
FMCPAY
LINK-ETH$24.26
0.0075492 Eth
$1,773,828.00
73,125.600 LINK
0.3458%
37
FMCPAY
LINK-BTC$24.24
0.0075433 Eth
$1,509,223.00
62,933.600 LINK
0.2976%
38
Kraken
LINK-EUR$24.30
0.0075534 Eth
$1,456,679.00
59,954.240 LINK
0.2835%
39
EarnBIT
LINK-USDT$24.26
0.0075467 Eth
$1,368,157.00
58,940.758 LINK
0.2787%
40
OKX
LINK-USDC$24.25
0.0075362 Eth
$1,337,474.00
57,284.090 LINK
0.2709%
41
Binance
LINK-ETH$24.27
0.0075502 Eth
$1,326,036.00
54,876.970 LINK
0.2595%
42
Tokpie
LINK-USDT$24.47
0.0076138 Eth
$1,299,625.00
53,113.623 LINK
0.2512%
43
EXMO
LINK-USDT$24.30
0.0075604 Eth
$1,274,012.00
52,426.243 LINK
0.2479%
44
Binance
LINK-TRY$24.24
0.0075330 Eth
$1,233,046.00
52,296.580 LINK
0.2473%
45
Bitbank
LINK-JPY$24.32
0.0075692 Eth
$1,225,301.00
50,381.544 LINK
0.2382%
46
tanX
LINK-USDC$24.29
0.0075576 Eth
$1,186,668.00
49,939.840 LINK
0.2361%
47
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.24
0.0075320 Eth
$1,095,195.00
45,276.911 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2141%
48
WhiteBIT
LINK-BTC$24.26
0.0075548 Eth
$1,079,405.00
44,502.300 LINK
0.2104%
49
BitStorage
LINK-USDT$24.26
0.0075497 Eth
$1,001,125.00
41,270.600 LINK
0.1952%
50
WhiteBIT
LINK-EUR$24.25
0.0075456 Eth
$953,045.00
39,308.480 LINK
0.1859%
51
Binance
LINK-EUR$24.24
0.0075345 Eth
$932,886.00
39,780.050 LINK
0.1881%
52
Coinbase Exchange
LINK-USDT$24.28
0.0075564 Eth
$909,150.00
37,447.732 LINK
0.1771%
53
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$24.22
0.0075382 Eth
$906,130.00
74,291.571 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3513%
54
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$24.25
0.0075437 Eth
$878,123.00
37,460.626 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1771%
55
Trubit
LINK-USDT$24.22
0.0075358 Eth
$865,956.00
36,559.430 LINK
0.1729%
56
QMall
LINK-USDC$24.26
0.0075511 Eth
$834,341.00
35,244.469 LINK
0.1667%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$24.27
0.0075423 Eth
$783,077.00
32,433.512 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1534%
58
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.24
0.0075343 Eth
$773,600.00
751,944.149 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.5556%
59
Bybit
LINK-USDC$24.31
0.0075546 Eth
$769,738.00
32,884.789 LINK
0.1555%
60
Gemini
LINK-USD$24.28
0.0075476 Eth
$747,262.00
30,773.867 LINK
0.1455%
61
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.26
0.0075424 Eth
$680,369.00
27,931.129 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1321%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$24.24
0.0075322 Eth
$566,915.00
23,403.217 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1107%
63
itBit
LINK-USD$24.27
0.0075517 Eth
$559,488.00
23,052.669 LINK
0.1090%
64
LATOKEN
LINK-BTC$24.27
0.0075526 Eth
$557,343.00
22,966.928 LINK
0.1086%
65
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$24.24
0.0075319 Eth
$517,285.00
21,979.186 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1039%
66
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$24.26
0.0075418 Eth
$495,767.00
20,594.565 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0974%
67
Coinbase Exchange
LINK-BTC$24.28
0.0075488 Eth
$463,375.00
19,083.130 LINK
0.0902%
68
Coinbase Exchange
LINK-ETH$24.24
0.0075428 Eth
$446,131.00
18,408.160 LINK
0.0870%
69
ProBit Global
LINK-USDT$24.29
0.0075606 Eth
$362,216.00
14,913.872 LINK
0.0705%
70
HashKey Exchange
LINK-USD$24.29
0.0075557 Eth
$354,324.00
14,856.207 LINK
0.0702%
71
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.22
0.0075382 Eth
$305,534.00
13,021.156 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0616%
72
Slex
LINK-ETH$24.27
0.0075532 Eth
$301,584.00
12,402.170 LINK
0.0586%
73
BitMart
LINK-BTC$24.28
0.0075523 Eth
$287,689.00
11,850.680 LINK
0.0560%
74
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$24.27
0.0075428 Eth
$281,321.00
11,590.578 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0548%
75
bitcastle
LINK-USDT$24.30
0.0075544 Eth
$269,314.00
11,394.470 LINK
0.0539%
76
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$24.21
0.0075352 Eth
$256,203.00
10,791.164 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0510%
77
Hotcoin
LINK-BTC$24.26
0.0075497 Eth
$255,670.00
10,540.030 LINK
0.0498%
78
Bitso
LINK-USD$24.23
0.0075406 Eth
$243,132.00
10,034.942 LINK
0.0475%
79
BitStorage
LINK-ETH$24.25
0.0075371 Eth
$242,437.00
9,996.490 LINK
0.0473%
80
Bitci TR
LINK-TRY$24.37
0.0075856 Eth
$227,603.00
9,560.543 LINK
0.0452%
81
PointPay
LINK-BTC$24.27
0.0075530 Eth
$215,877.00
9,041.924 LINK
0.0428%
82
KuCoin
LINK-USDC$24.25
0.0075380 Eth
$212,772.00
8,775.159 LINK
0.0415%
83
BYDFi
LINK-USDC$24.25
0.0075417 Eth
$204,872.00
8,449.430 LINK
0.0400%
84
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$24.23
0.0075374 Eth
$195,808.00
188,698.109 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.8923%
85
Mercado Bitcoin
LINK-BRL$24.13
0.0075071 Eth
$189,903.00
7,871.055 LINK
0.0372%
86
Kraken
LINK-GBP$24.25
0.0075373 Eth
$175,539.00
7,238.934 LINK
0.0342%
87
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$24.27
0.0075449 Eth
$168,753.00
163,232.545 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.7719%
88
Bitkub
LINK-THB$24.42
0.0075915 Eth
$160,255.00
6,562.666 LINK
0.0310%
89
CoinTR
LINK-TRY$24.26
0.0075391 Eth
$159,039.00
6,710.310 LINK
0.0317%
90
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$24.29
0.0075514 Eth
$117,479.00
4,793.294 0X5947BB275C521040051D82396192181B413227A3
0.0227%
91
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$24.23
0.0075374 Eth
$115,422.00
4,841.560 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0229%
92
BitMart
LINK-ETH$24.26
0.0075475 Eth
$95,586.00
3,940.680 LINK
0.0186%
93
Binance US
LINK-USDT$24.24
0.0075421 Eth
$90,477.00
3,732.848 LINK
0.0177%
94
CoinEx
LINK-BTC$24.22
0.0075369 Eth
$88,881.00
3,788.643 LINK
0.0179%
95
Hotcoin
LINK-ETH$24.23
0.0075415 Eth
$75,556.00
3,118.190 LINK
0.0147%
96
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$24.44
0.0075947 Eth
$66,891.00
2,720.530 0X5947BB275C521040051D82396192181B413227A3
0.0129%
97
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$24.25
0.0075468 Eth
$65,100.00
2,769.494 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0131%
98
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$24.33
0.0075623 Eth
$63,755.00
84.307 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0004%
99
Nonkyc.io
LINK-BTC$24.36
0.0075813 Eth
$63,081.00
2,625.325 LINK
0.0124%
100
Dex-Trade
LINK-ETH$24.21
0.0075343 Eth
$38,547.00
1,592.360 LINK
0.0075%

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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