ETH Price: $3,291.97 (-0.61%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,171 ( 0.007%)

Market

Price

$23.56 @ 0.007157 ETH (-1.25%)

Onchain Market Cap

$23,560,000,000.00

Circulating Supply Market Cap

$14,869,229,716.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
3,124.467789258708013588 LINK

Value
$73,612.46 ( ~22.3612 Eth) [0.0003%]
0x99f25eeb3b5f9baa9ec9d5c9f60914f2e0efa406
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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 21318.18% |ETH 0.0003846 1760.89%

Market

Volume (24H):$1,065,119,148.00
Market Capitalization:$14,869,229,716.00
Circulating Supply:631,099,972.00 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$23.58
0.0071535 Eth
$151,935,376.00
6,334,472.900 LINK
22.6623%
2
Coinbase Exchange
LINK-USD$23.48
0.0071364 Eth
$75,617,248.00
3,220,496.070 LINK
11.5217%
3
Bybit
LINK-USDT$23.51
0.0071449 Eth
$43,677,461.00
1,821,805.121 LINK
6.5177%
4
Slex
LINK-USDT$23.47
0.0071354 Eth
$24,389,373.00
1,018,450.520 LINK
3.6436%
5
OKX
LINK-USDT$23.52
0.0071480 Eth
$19,375,833.00
807,529.600 LINK
2.8890%
6
DigiFinex
LINK-USDT$23.51
0.0071451 Eth
$18,444,984.00
784,458.550 LINK
2.8065%
7
HTX
LINK-USDT$23.51
0.0071431 Eth
$18,192,286.00
759,542.914 LINK
2.7174%
8
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.48
0.0071359 Eth
$16,945,984.00
707,532.886 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.5313%
9
Gate.io
LINK-USDT$23.51
0.0071436 Eth
$16,020,930.00
668,930.820 LINK
2.3932%
10
XT.COM
LINK-USDT$23.49
0.0071416 Eth
$14,988,490.00
624,979.520 LINK
2.2359%
11
Azbit
LINK-USDT$23.49
0.0071394 Eth
$14,852,718.00
619,012.601 LINK
2.2146%
12
Binance
LINK-FDUSD$23.52
0.0071449 Eth
$14,704,394.00
614,039.110 LINK
2.1968%
13
Coinstore
LINK-USDT$23.49
0.0071401 Eth
$13,212,544.00
551,118.480 LINK
1.9717%
14
MEXC
LINK-USDT$23.48
0.0071393 Eth
$13,190,641.00
561,683.190 LINK
2.0095%
15
Bitunix
LINK-USDT$23.52
0.0071459 Eth
$11,138,266.00
473,526.270 LINK
1.6941%
16
CoinW
LINK-USDT$23.51
0.0071452 Eth
$9,918,494.00
421,973.570 LINK
1.5097%
17
Kraken
LINK-USD$23.51
0.0071425 Eth
$8,922,887.00
379,608.942 LINK
1.3581%
18
BTSE
LINK-USDT$23.45
0.0071296 Eth
$8,537,951.00
364,036.308 LINK
1.3024%
19
BYDFi
LINK-USDT$23.51
0.0071437 Eth
$8,296,483.00
352,830.590 LINK
1.2623%
20
KuCoin
LINK-USDT$23.52
0.0071463 Eth
$8,265,557.00
351,479.233 LINK
1.2575%
21
LATOKEN
LINK-USDT$23.49
0.0071379 Eth
$7,493,700.00
318,984.401 LINK
1.1412%
22
Binance
LINK-USDC$23.60
0.0071604 Eth
$7,257,976.00
302,810.470 LINK
1.0833%
23
LBank
LINK-USDT$23.47
0.0071363 Eth
$7,251,182.00
308,900.820 LINK
1.1051%
24
Hotcoin
LINK-USDT$23.49
0.0071414 Eth
$6,144,260.00
261,525.120 LINK
0.9356%
25
QMall
LINK-USDT$23.50
0.0071427 Eth
$5,996,400.00
250,015.093 LINK
0.8945%
26
Coinbase Exchange
LINK-USDT$23.51
0.0071473 Eth
$5,349,414.00
227,523.740 LINK
0.8140%
27
Coinbase Exchange
LINK-EUR$23.44
0.0071219 Eth
$5,185,393.00
221,256.310 LINK
0.7916%
28
Dex-Trade
LINK-USDT$23.46
0.0071316 Eth
$4,633,160.00
197,455.910 LINK
0.7064%
29
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.47
0.0071341 Eth
$3,910,525.00
163,415.719 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.5846%
30
Bitvavo
LINK-EUR$23.45
0.0071300 Eth
$3,687,125.00
157,202.502 LINK
0.5624%
31
FMCPAY
LINK-USDT$23.49
0.0071406 Eth
$3,556,817.00
148,506.982 LINK
0.5313%
32
CoinEx
LINK-USDT$23.49
0.0071358 Eth
$2,947,795.00
123,302.060 LINK
0.4411%
33
Coinbase Exchange
LINK-ETH$23.53
0.0071533 Eth
$2,619,993.00
111,347.150 LINK
0.3984%
34
Biconomy.com
LINK-USDT$23.50
0.0071404 Eth
$2,493,115.00
103,978.470 LINK
0.3720%
35
PointPay
LINK-USDT$23.46
0.0071327 Eth
$2,191,978.00
91,417.236 LINK
0.3271%
36
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.59
0.0071730 Eth
$1,843,682.00
77,316.372 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2766%
37
FMCPAY
LINK-ETH$23.56
0.0071503 Eth
$1,778,948.00
74,228.960 LINK
0.2656%
38
Coinbase Exchange
LINK-GBP$23.42
0.0071183 Eth
$1,747,893.00
74,618.580 LINK
0.2670%
39
AscendEX (BitMax)
LINK-USDT$23.64
0.0071822 Eth
$1,706,764.00
72,213.200 LINK
0.2584%
40
Phemex
LINK-USDT$23.49
0.0071416 Eth
$1,663,276.00
70,803.460 LINK
0.2533%
41
FMCPAY
LINK-BTC$23.48
0.0071372 Eth
$1,610,485.00
66,649.000 LINK
0.2384%
42
Kraken
LINK-EUR$23.43
0.0071182 Eth
$1,424,042.00
60,790.018 LINK
0.2175%
43
EXMO
LINK-USDT$23.54
0.0071573 Eth
$1,401,016.00
59,505.281 LINK
0.2129%
44
Binance
LINK-ETH$23.59
0.0071656 Eth
$1,216,363.00
50,658.430 LINK
0.1812%
45
BitStorage
LINK-USDT$23.48
0.0071393 Eth
$1,153,879.00
49,134.420 LINK
0.1758%
46
Bitbank
LINK-JPY$23.50
0.0071444 Eth
$1,137,054.00
48,381.279 LINK
0.1731%
47
Tokpie
LINK-USDT$23.44
0.0071163 Eth
$1,131,955.00
48,285.574 LINK
0.1727%
48
tanX
LINK-USDC$23.50
0.0071447 Eth
$1,129,304.00
47,094.990 LINK
0.1685%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.52
0.0071501 Eth
$1,111,530.00
46,274.765 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1656%
50
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.48
0.0071345 Eth
$1,023,772.00
1,046,253.806 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.7431%
51
Binance
LINK-TRY$23.65
0.0071876 Eth
$990,732.00
41,019.990 LINK
0.1468%
52
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.47
0.0071341 Eth
$960,689.00
40,137.995 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1436%
53
Kraken
LINK-USDT$23.49
0.0071407 Eth
$927,031.00
39,465.388 LINK
0.1412%
54
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.48
0.0071379 Eth
$890,491.00
64,327.720 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2301%
55
EarnBIT
LINK-USDT$23.50
0.0071396 Eth
$888,230.00
37,042.365 LINK
0.1325%
56
Trubit
LINK-USDT$23.49
0.0071414 Eth
$873,400.00
36,505.920 LINK
0.1306%
57
BigONE
LINK-USDT$23.44
0.0071254 Eth
$836,572.00
35,690.790 LINK
0.1277%
58
Binance
LINK-EUR$23.46
0.0071172 Eth
$826,903.00
34,579.280 LINK
0.1237%
59
Gemini
LINK-USD$23.52
0.0071483 Eth
$787,822.00
33,490.820 LINK
0.1198%
60
Bybit
LINK-USDC$23.50
0.0071425 Eth
$787,696.00
32,902.361 LINK
0.1177%
61
LATOKEN
LINK-BTC$23.47
0.0071302 Eth
$768,726.00
32,754.103 LINK
0.1172%
62
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.52
0.0071501 Eth
$655,999.00
669,632.125 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.3957%
63
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.55
0.0071553 Eth
$632,153.00
26,346.879 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0943%
64
QMall
LINK-USDC$23.51
0.0071434 Eth
$590,465.00
24,631.074 LINK
0.0881%
65
itBit
LINK-USD$23.48
0.0071376 Eth
$550,962.00
23,465.157 LINK
0.0839%
66
Kraken
LINK-ETH$23.51
0.0071428 Eth
$530,650.00
22,574.545 LINK
0.0808%
67
GMO Japan
LINK-JPY$23.49
0.0071408 Eth
$470,607.00
20,035.100 LINK
0.0717%
68
Coinbase Exchange
LINK-BTC$23.48
0.0071390 Eth
$421,083.00
17,930.410 LINK
0.0641%
69
OKX
LINK-USDC$23.51
0.0071441 Eth
$373,687.00
15,602.804 LINK
0.0558%
70
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.71
0.0072047 Eth
$355,879.00
14,858.917 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0532%
71
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.48
0.0071374 Eth
$332,711.00
13,866.580 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0496%
72
BitDelta
LINK-USDT$23.49
0.0071379 Eth
$330,197.00
13,787.000 LINK
0.0493%
73
Slex
LINK-ETH$23.48
0.0071387 Eth
$316,816.00
13,229.390 LINK
0.0473%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.55
0.0071590 Eth
$312,181.00
13,028.277 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0466%
75
PointPay
LINK-BTC$23.47
0.0071340 Eth
$299,948.00
12,447.201 LINK
0.0445%
76
BitMart
LINK-BTC$23.48
0.0071365 Eth
$283,113.00
12,059.720 LINK
0.0431%
77
BitStorage
LINK-ETH$23.48
0.0071387 Eth
$247,795.00
10,552.510 LINK
0.0378%
78
Hotcoin
LINK-BTC$23.51
0.0071423 Eth
$220,516.00
9,380.840 LINK
0.0336%
79
Bitci TR
LINK-TRY$23.57
0.0071641 Eth
$214,883.00
8,913.923 LINK
0.0319%
80
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.49
0.0071397 Eth
$199,173.00
8,325.869 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0298%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.49
0.0071427 Eth
$197,985.00
8,255.577 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0295%
82
Bitkub
LINK-THB$23.55
0.0071573 Eth
$190,253.00
8,077.533 LINK
0.0289%
83
BYDFi
LINK-USDC$23.57
0.0071534 Eth
$183,575.00
7,789.480 LINK
0.0279%
84
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.58
0.0071664 Eth
$182,695.00
7,592.335 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0272%
85
Binance
LINK-BNB$23.45
0.0071275 Eth
$174,117.00
7,210.424 LINK
0.0258%
86
KuCoin
LINK-USDC$23.61
0.0071741 Eth
$170,167.00
7,208.032 LINK
0.0258%
87
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.61
0.0071780 Eth
$162,659.00
6,703.820 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0240%
88
CoinEx
LINK-USDC$23.68
0.0071942 Eth
$158,690.00
6,698.731 LINK
0.0240%
89
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.47
0.0071341 Eth
$145,852.00
149,056.928 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5333%
90
Binance US
LINK-USDT$23.48
0.0071393 Eth
$137,772.00
5,866.591 LINK
0.0210%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.53
0.0071539 Eth
$127,196.00
5,331.115 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0191%
92
Kraken
LINK-GBP$23.48
0.0071385 Eth
$126,261.00
5,376.772 LINK
0.0192%
93
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.54
0.0071544 Eth
$125,398.00
5,188.697 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0186%
94
Bitso
LINK-USD$23.65
0.0071799 Eth
$101,448.00
4,289.156 LINK
0.0153%
95
KuCoin
LINK-BTC$23.50
0.0071410 Eth
$101,123.00
4,303.268 LINK
0.0154%
96
Mercado Bitcoin
LINK-BRL$23.50
0.0071418 Eth
$98,949.00
4,210.354 LINK
0.0151%
97
BTCMarkets
LINK-AUD$23.65
0.0071904 Eth
$96,512.00
4,080.255 LINK
0.0146%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.49
0.0071400 Eth
$90,993.00
3,795.361 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0136%
99
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.55
0.0071600 Eth
$73,313.00
3,060.094 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0109%
100
Dex-Trade
LINK-ETH$23.56
0.0071483 Eth
$35,640.00
1,512.960 LINK
0.0054%

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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