ETH Price: $2,641.41 (+0.98%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

722,299 ( 0.003%)

Market

Price

$12.00 @ 0.004543 ETH (+4.43%)

Onchain Market Cap

$12,000,000,000.00

Circulating Supply Market Cap

$7,520,966,392.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
adamclark.eth
Balance
0 LINK

Value
$0.00
0x33deb0de3d1f72b86ecb578fabcd50e882b39865
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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 10809.09% |ETH 0.0003846 1081.23%

Market

Volume (24H):$408,723,425.00
Market Capitalization:$7,520,966,392.00
Circulating Supply:626,849,971.00 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$11.98
0.0045342 Eth
$28,347,988.00
2,436,510.570 LINK
13.9318%
2
WhiteBIT
LINK-USDT$11.99
0.0045356 Eth
$19,621,906.00
1,636,216.030 LINK
9.3558%
3
Coinbase Exchange
LINK-USD$11.99
0.0045354 Eth
$16,680,585.00
1,390,860.070 LINK
7.9528%
4
HTX
LINK-USDT$11.99
0.0045329 Eth
$16,075,086.00
1,384,627.715 LINK
7.9172%
5
Bybit
LINK-USDT$12.00
0.0045377 Eth
$10,754,439.00
922,164.107 LINK
5.2729%
6
Bitget
LINK-USDT$11.99
0.0045351 Eth
$9,696,571.00
832,989.139 LINK
4.7630%
7
Gate.io
LINK-USDT$11.99
0.0045357 Eth
$6,680,083.00
575,111.150 LINK
3.2884%
8
P2B
LINK-USDT$11.99
0.0045327 Eth
$5,515,516.00
460,145.910 LINK
2.6311%
9
Upbit
LINK-KRW$12.02
0.0045474 Eth
$5,504,258.00
457,736.391 LINK
2.6173%
10
Azbit
LINK-USDT$11.99
0.0045361 Eth
$5,296,272.00
455,615.510 LINK
2.6052%
11
OKX
LINK-USDT$11.99
0.0045334 Eth
$5,042,789.00
432,121.591 LINK
2.4708%
12
Slex
LINK-USDT$12.00
0.0045367 Eth
$5,003,927.00
429,775.240 LINK
2.4574%
13
BTSE
LINK-USDT$11.99
0.0045343 Eth
$4,674,544.00
389,901.145 LINK
2.2294%
14
BVOX
LINK-USDT$11.99
0.0045358 Eth
$4,408,849.00
379,450.250 LINK
2.1697%
15
DigiFinex
LINK-USDT$11.99
0.0045345 Eth
$3,831,070.00
319,498.800 LINK
1.8269%
16
Biconomy.com
LINK-USDT$11.99
0.0045336 Eth
$3,482,891.00
299,155.730 LINK
1.7106%
17
CoinW
LINK-USDT$11.99
0.0045382 Eth
$3,011,752.00
251,131.750 LINK
1.4360%
18
Bitunix
LINK-USDT$11.99
0.0045366 Eth
$2,890,753.00
240,984.600 LINK
1.3779%
19
ProBit Global
LINK-USDT$12.01
0.0045402 Eth
$2,859,749.00
238,185.747 LINK
1.3619%
20
XT.COM
LINK-USDT$12.00
0.0045366 Eth
$2,820,366.00
242,306.470 LINK
1.3855%
21
Hotcoin
LINK-USDT$11.99
0.0045359 Eth
$2,585,814.00
215,578.390 LINK
1.2327%
22
KuCoin
LINK-USDT$12.00
0.0045366 Eth
$2,283,266.00
190,331.876 LINK
1.0883%
23
Coinstore
LINK-USDT$12.00
0.0045398 Eth
$2,073,143.00
178,113.230 LINK
1.0184%
24
LBank
LINK-USDT$11.99
0.0045328 Eth
$2,008,529.00
167,559.940 LINK
0.9581%
25
Binance
LINK-BTC$12.00
0.0045389 Eth
$1,973,333.00
168,457.810 LINK
0.9632%
26
Trubit
LINK-USDT$11.99
0.0045333 Eth
$1,954,654.00
168,623.960 LINK
0.9642%
27
AscendEX (BitMax)
LINK-USDT$11.96
0.0045242 Eth
$1,776,011.00
148,466.600 LINK
0.8489%
28
Bitvavo
LINK-EUR$11.97
0.0045252 Eth
$1,702,327.00
142,220.505 LINK
0.8132%
29
Binance
LINK-FDUSD$12.00
0.0045412 Eth
$1,646,381.00
141,171.820 LINK
0.8072%
30
Kraken
LINK-USD$11.97
0.0045275 Eth
$1,638,581.00
136,871.192 LINK
0.7826%
31
Bithumb
LINK-KRW$12.04
0.0045522 Eth
$1,426,647.00
118,498.098 LINK
0.6776%
32
BYDFi
LINK-USDT$11.99
0.0045393 Eth
$1,398,000.00
116,549.450 LINK
0.6664%
33
WhiteBIT
LINK-BTC$11.99
0.0045334 Eth
$1,193,260.00
99,510.320 LINK
0.5690%
34
FameEX
LINK-USDT$11.99
0.0045380 Eth
$1,131,378.00
97,224.685 LINK
0.5559%
35
HashKey Global
LINK-USDT$12.02
0.0045457 Eth
$1,073,593.00
93,187.819 LINK
0.5328%
36
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.95
0.0045185 Eth
$1,031,419.00
89,251.151 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.5103%
37
Dex-Trade
LINK-USDT$12.00
0.0045340 Eth
$977,983.00
81,529.720 LINK
0.4662%
38
Azbit
LINK-ETH$12.01
0.0045415 Eth
$965,038.00
82,654.951 LINK
0.4726%
39
BigONE
LINK-USDT$11.98
0.0045332 Eth
$850,944.00
71,011.580 LINK
0.4060%
40
Binance
LINK-USDC$11.99
0.0045363 Eth
$824,033.00
70,819.810 LINK
0.4049%
41
CoinEx
LINK-USDT$12.00
0.0045392 Eth
$813,615.00
70,073.877 LINK
0.4007%
42
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.96
0.0045243 Eth
$658,516.00
56,345.843 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3222%
43
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.97
0.0045284 Eth
$593,449.00
50,849.901 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2908%
44
LATOKEN
LINK-USDT$12.01
0.0045423 Eth
$539,574.00
44,941.208 LINK
0.2570%
45
tanX
LINK-USDC$12.01
0.0045464 Eth
$517,698.00
44,497.860 LINK
0.2544%
46
PointPay
LINK-USDT$12.00
0.0045431 Eth
$461,146.00
39,623.592 LINK
0.2266%
47
itBit
LINK-USD$11.99
0.0045340 Eth
$425,923.00
35,523.176 LINK
0.2031%
48
Coinbase Exchange
LINK-USDT$11.93
0.0045140 Eth
$404,133.00
33,862.174 LINK
0.1936%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.01
0.0045412 Eth
$399,661.00
34,113.130 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1951%
50
LATOKEN
LINK-BTC$12.02
0.0045464 Eth
$394,602.00
32,837.447 LINK
0.1878%
51
Gemini
LINK-USD$12.00
0.0045374 Eth
$385,369.00
32,116.763 LINK
0.1836%
52
ProBit Global
LINK-BTC$11.99
0.0045387 Eth
$364,951.00
30,426.947 LINK
0.1740%
53
KickEX
LINK-USDT$11.93
0.0045217 Eth
$364,052.00
30,507.355 LINK
0.1744%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.97
0.0045247 Eth
$347,146.00
29,875.370 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1708%
55
Bybit
LINK-USDC$11.99
0.0045360 Eth
$344,418.00
29,575.849 LINK
0.1691%
56
Phemex
LINK-USDT$11.98
0.0045310 Eth
$313,072.00
26,142.420 LINK
0.1495%
57
EXMO
LINK-USDT$11.99
0.0045343 Eth
$295,417.00
24,634.628 LINK
0.1409%
58
BYDFi
LINK-USDC$12.00
0.0045395 Eth
$251,112.00
20,925.820 LINK
0.1197%
59
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$11.98
0.0045310 Eth
$239,654.00
20,610.244 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1178%
60
Binance
LINK-EUR$11.97
0.0045253 Eth
$221,515.00
19,129.420 LINK
0.1094%
61
BitMart
LINK-BTC$12.00
0.0045362 Eth
$207,430.00
17,292.260 LINK
0.0989%
62
Bitbank
LINK-JPY$12.01
0.0045400 Eth
$175,005.00
14,577.167 LINK
0.0834%
63
OKX
LINK-USDC$11.99
0.0045333 Eth
$155,407.00
13,332.078 LINK
0.0762%
64
BitDelta
LINK-USDT$12.00
0.0045376 Eth
$149,514.00
12,885.000 LINK
0.0737%
65
GMO Japan
LINK-JPY$12.01
0.0045427 Eth
$146,975.00
12,235.800 LINK
0.0700%
66
WhiteBIT
LINK-TRY$12.01
0.0045422 Eth
$133,124.00
11,081.920 LINK
0.0634%
67
Coinbase Exchange
LINK-BTC$11.99
0.0045356 Eth
$125,210.00
10,440.160 LINK
0.0597%
68
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$12.02
0.0045456 Eth
$115,915.00
9,913.222 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0567%
69
Binance
LINK-TRY$12.02
0.0045442 Eth
$112,370.00
9,512.200 LINK
0.0544%
70
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.01
0.0045412 Eth
$111,808.00
108,480.666 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6203%
71
Slex
LINK-BTC$12.00
0.0045390 Eth
$111,437.00
9,506.500 LINK
0.0544%
72
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.97
0.0045260 Eth
$92,290.00
7,547.848 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0432%
73
Bitkub
LINK-THB$11.97
0.0045263 Eth
$84,753.00
7,080.708 LINK
0.0405%
74
Bitso
LINK-USD$11.95
0.0045218 Eth
$82,044.00
6,865.108 LINK
0.0393%
75
PointPay
LINK-BTC$12.00
0.0045370 Eth
$74,426.00
6,346.164 LINK
0.0363%
76
Slex
LINK-ETH$12.01
0.0045410 Eth
$65,505.00
5,609.640 LINK
0.0321%
77
Binance
LINK-BNB$12.00
0.0045385 Eth
$65,036.00
5,641.442 LINK
0.0323%
78
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$11.96
0.0045203 Eth
$63,056.00
5,407.790 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0309%
79
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.92
0.0045067 Eth
$58,471.00
56,962.527 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3257%
80
Kraken
LINK-GBP$11.97
0.0045277 Eth
$58,371.00
4,875.791 LINK
0.0279%
81
Kanga
LINK-PLN$11.93
0.0045142 Eth
$56,815.00
0.000 LINK
0.0000%
82
Binance US
LINK-USDT$12.00
0.0045386 Eth
$53,289.00
4,442.051 LINK
0.0254%
83
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.89
0.0044949 Eth
$52,461.00
4,522.532 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0259%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.01
0.0045412 Eth
$39,179.00
3,364.089 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0192%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$11.89
0.0044947 Eth
$37,345.00
3,222.223 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0184%
86
Binance
LINK-BRL$11.88
0.0044935 Eth
$36,385.00
3,162.050 LINK
0.0181%
87
Mercado Bitcoin
LINK-BRL$11.90
0.0044997 Eth
$31,044.00
2,609.175 LINK
0.0149%
88
EXMO
LINK-BTC$11.98
0.0045308 Eth
$30,604.00
2,554.004 LINK
0.0146%
89
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.99
0.0045345 Eth
$29,670.00
2,548.002 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0146%
90
Bitcointry
LINK-USDT$11.99
0.0045340 Eth
$28,552.00
2,472.818 LINK
0.0141%
91
HTX
LINK-BTC$11.98
0.0045320 Eth
$27,921.00
2,411.283 LINK
0.0138%
92
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$11.93
0.0045118 Eth
$25,204.00
2,155.519 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0123%
93
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.99
0.0045363 Eth
$24,337.00
23,576.782 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1348%
94
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$11.92
0.0045067 Eth
$24,071.00
2,063.519 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0118%
95
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.96
0.0045243 Eth
$22,150.00
21,524.481 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.1231%
96
KuCoin
LINK-USDC$12.00
0.0045367 Eth
$22,114.00
1,843.327 LINK
0.0105%
97
Coinone
LINK-KRW$12.05
0.0045582 Eth
$21,650.00
1,796.144 LINK
0.0103%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.98
0.0045308 Eth
$19,398.34
1,658.802 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0095%
99
Nonkyc.io
LINK-BTC$12.04
0.0045513 Eth
$17,880.60
1,529.164 LINK
0.0087%
100
PancakeSwap V3 (BSC)
0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.96
0.0045227 Eth
$13,136.60
7,055.511 0X0E09FABB73BD3ADE0A17ECC321FD13A19E81CE82
0.0403%

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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