ETH Price: $3,371.23 (-2.51%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,887 (0.00%)

Market

Price

$23.13 @ 0.006861 ETH (-3.90%)

Onchain Market Cap

$23,130,000,000.00

Circulating Supply Market Cap

$14,585,286,658.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
dezicakes.eth
Balance
245.60341543 LINK

Value
$5,680.81 ( ~1.6851 Eth) [0.0000%]
0x87e791e6c3b94225b3130e2fe298fb51567f05ad
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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 20927.27% |ETH 0.0003846 1683.93%

Market

Volume (24H):$991,928,235.00
Market Capitalization:$14,585,286,658.00
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$23.21
0.0068744 Eth
$96,811,124.00
4,191,039.830 LINK
17.9153%
2
Upbit
LINK-KRW$23.60
0.0069982 Eth
$38,100,278.00
1,614,385.964 LINK
6.9010%
3
Coinbase Exchange
LINK-USD$23.13
0.0068555 Eth
$37,358,234.00
1,615,421.350 LINK
6.9054%
4
WhiteBIT
LINK-USDT$23.12
0.0068533 Eth
$36,525,704.00
1,579,648.960 LINK
6.7525%
5
Bitget
LINK-USDT$23.11
0.0068522 Eth
$31,408,555.00
1,361,105.953 LINK
5.8183%
6
Bybit
LINK-USDT$23.09
0.0068459 Eth
$25,910,184.00
1,122,133.732 LINK
4.7968%
7
Slex
LINK-USDT$23.18
0.0068637 Eth
$23,552,061.00
1,022,247.540 LINK
4.3698%
8
P2B
LINK-USDT$23.11
0.0068525 Eth
$19,856,157.00
859,088.460 LINK
3.6723%
9
CoinW
LINK-USDT$23.15
0.0068564 Eth
$19,093,724.00
824,695.700 LINK
3.5253%
10
OKX
LINK-USDT$23.10
0.0068503 Eth
$18,729,328.00
812,035.935 LINK
3.4712%
11
DigiFinex
LINK-USDT$23.11
0.0068533 Eth
$12,977,509.00
561,460.100 LINK
2.4001%
12
HTX
LINK-USDT$23.13
0.0068574 Eth
$11,501,474.00
499,818.663 LINK
2.1366%
13
XT.COM
LINK-USDT$23.10
0.0068500 Eth
$9,647,140.00
418,093.040 LINK
1.7872%
14
Azbit
LINK-USDT$23.11
0.0068449 Eth
$9,591,770.00
415,896.962 LINK
1.7778%
15
Coinstore
LINK-USDT$23.08
0.0068431 Eth
$8,478,000.00
367,586.050 LINK
1.5713%
16
Bitunix
LINK-USDT$23.14
0.0068595 Eth
$8,061,066.00
348,441.410 LINK
1.4895%
17
Kraken
LINK-USD$23.09
0.0068478 Eth
$7,537,838.00
326,407.993 LINK
1.3953%
18
Bithumb
LINK-KRW$23.56
0.0069862 Eth
$7,421,316.00
314,995.873 LINK
1.3465%
19
Biconomy.com
LINK-USDT$23.13
0.0068576 Eth
$6,896,643.00
298,987.764 LINK
1.2781%
20
Binance
LINK-FDUSD$22.96
0.0068405 Eth
$6,862,679.00
297,170.790 LINK
1.2703%
21
BTSE
LINK-USDT$23.15
0.0068568 Eth
$6,835,554.00
295,227.024 LINK
1.2620%
22
BYDFi
LINK-USDT$23.12
0.0068539 Eth
$6,152,600.00
266,061.560 LINK
1.1373%
23
KuCoin
LINK-USDT$23.12
0.0068544 Eth
$5,374,888.00
232,523.846 LINK
0.9940%
24
Hotcoin
LINK-USDT$23.16
0.0068589 Eth
$4,878,881.00
210,654.020 LINK
0.9005%
25
LATOKEN
LINK-USDT$23.12
0.0068514 Eth
$4,696,472.00
203,168.960 LINK
0.8685%
26
LBank
LINK-USDT$23.05
0.0068366 Eth
$4,578,904.00
198,669.910 LINK
0.8492%
27
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.12
0.0068537 Eth
$4,412,582.00
191,258.032 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.8176%
28
FMCPAY
LINK-USDT$23.18
0.0068711 Eth
$3,371,396.00
146,114.780 LINK
0.6246%
29
Dex-Trade
LINK-USDT$22.95
0.0068371 Eth
$3,117,844.00
135,854.980 LINK
0.5807%
30
Coinbase Exchange
LINK-GBP$23.10
0.0068506 Eth
$2,898,449.00
125,450.860 LINK
0.5363%
31
Bitvavo
LINK-EUR$23.13
0.0068577 Eth
$2,559,583.00
110,666.865 LINK
0.4731%
32
Dcoin
LINK-USDT$23.15
0.0068639 Eth
$2,391,963.00
103,304.000 LINK
0.4416%
33
CoinEx
LINK-USDT$22.96
0.0068364 Eth
$1,971,498.00
85,718.631 LINK
0.3664%
34
Bitbank
LINK-JPY$23.27
0.0069000 Eth
$1,584,737.00
68,092.477 LINK
0.2911%
35
PointPay
LINK-USDT$22.94
0.0068295 Eth
$1,553,147.00
67,392.163 LINK
0.2881%
36
FMCPAY
LINK-ETH$23.17
0.0068679 Eth
$1,471,775.00
63,729.440 LINK
0.2724%
37
FMCPAY
LINK-BTC$23.03
0.0068338 Eth
$1,390,761.00
60,555.400 LINK
0.2589%
38
EXMO
LINK-USDT$23.14
0.0068602 Eth
$1,369,366.00
59,189.963 LINK
0.2530%
39
Bitstamp
LINK-USD$23.12
0.0068557 Eth
$1,248,654.00
54,007.519 LINK
0.2309%
40
WhiteBIT
LINK-BTC$23.19
0.0068663 Eth
$1,205,359.00
51,987.020 LINK
0.2222%
41
WhiteBIT
LINK-TRY$23.11
0.0068562 Eth
$1,174,790.00
50,826.710 LINK
0.2173%
42
Phemex
LINK-USDT$22.99
0.0068421 Eth
$1,154,451.00
50,208.760 LINK
0.2146%
43
Bybit
LINK-USDC$23.12
0.0068545 Eth
$1,044,339.00
45,470.827 LINK
0.1944%
44
Bitstamp
LINK-EUR$23.21
0.0068830 Eth
$1,039,529.00
44,784.067 LINK
0.1914%
45
Coinbase Exchange
LINK-EUR$23.12
0.0068548 Eth
$1,028,594.00
44,492.640 LINK
0.1902%
46
tanX
LINK-USDC$23.16
0.0068655 Eth
$975,198.00
42,201.710 LINK
0.1804%
47
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.17
0.0068687 Eth
$909,077.00
39,262.015 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1678%
48
EarnBIT
LINK-USDT$22.94
0.0068347 Eth
$907,244.00
39,363.883 LINK
0.1683%
49
Coinbase Exchange
LINK-USDT$23.16
0.0068578 Eth
$853,852.00
36,865.061 LINK
0.1576%
50
itBit
LINK-USD$23.07
0.0068513 Eth
$830,601.00
36,003.500 LINK
0.1539%
51
Azbit
LINK-ETH$23.15
0.0068565 Eth
$800,537.00
34,654.643 LINK
0.1481%
52
BigONE
LINK-USDT$22.86
0.0068075 Eth
$796,212.00
34,825.030 LINK
0.1489%
53
BitStorage
LINK-USDT$23.03
0.0068352 Eth
$788,173.00
34,221.370 LINK
0.1463%
54
Tokpie
LINK-USDT$22.71
0.0067613 Eth
$671,260.00
29,560.464 LINK
0.1264%
55
Binance
LINK-TRY$23.27
0.0069010 Eth
$506,718.00
21,945.270 LINK
0.0938%
56
Koinpark
LINK-USDT$23.16
0.0068589 Eth
$498,440.00
21,521.018 LINK
0.0920%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.10
0.0068463 Eth
$491,986.00
21,398.564 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0915%
58
HashKey Exchange
LINK-USD$23.19
0.0068727 Eth
$489,660.00
21,125.387 LINK
0.0903%
59
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$22.98
0.0068122 Eth
$478,709.00
20,922.804 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0894%
60
Binance
LINK-EUR$23.18
0.0068706 Eth
$456,925.00
19,863.820 LINK
0.0849%
61
Gemini
LINK-USD$23.16
0.0068664 Eth
$455,191.00
19,657.612 LINK
0.0840%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.09
0.0068447 Eth
$441,694.00
19,169.835 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0819%
63
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.14
0.0068624 Eth
$418,060.00
416,607.135 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7809%
64
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.03
0.0068264 Eth
$417,244.00
18,204.075 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0778%
65
Slex
LINK-ETH$23.12
0.0068553 Eth
$416,332.00
18,039.890 LINK
0.0771%
66
GMO Japan
LINK-JPY$23.25
0.0068933 Eth
$408,288.00
17,561.700 LINK
0.0751%
67
BitMart
LINK-BTC$23.16
0.0068674 Eth
$362,431.00
15,648.340 LINK
0.0669%
68
WhiteBIT
LINK-EUR$23.15
0.0068625 Eth
$336,736.00
14,543.520 LINK
0.0622%
69
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.12
0.0068537 Eth
$332,742.00
24,697.629 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1056%
70
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.09
0.0068447 Eth
$291,595.00
290,689.362 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.2426%
71
OKX
LINK-USDC$23.10
0.0068511 Eth
$278,400.00
12,105.055 LINK
0.0517%
72
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.22
0.0068844 Eth
$269,277.00
11,615.406 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0497%
73
Bitkub
LINK-THB$23.28
0.0069012 Eth
$260,407.00
11,187.000 LINK
0.0478%
74
LATOKEN
LINK-BTC$23.11
0.0068522 Eth
$257,770.00
11,154.972 LINK
0.0477%
75
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.16
0.0068660 Eth
$255,572.00
10,965.551 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0469%
76
BitDelta
LINK-USDT$22.93
0.0068281 Eth
$251,731.00
10,922.000 LINK
0.0467%
77
Coinbase Exchange
LINK-BTC$23.14
0.0068524 Eth
$247,046.00
10,676.790 LINK
0.0456%
78
Bitci TR
LINK-TRY$23.15
0.0068938 Eth
$234,979.00
10,144.481 LINK
0.0434%
79
PointPay
LINK-BTC$23.18
0.0068637 Eth
$197,722.00
8,578.888 LINK
0.0367%
80
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.21
0.0068731 Eth
$183,589.00
7,944.512 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0340%
81
Hotcoin
LINK-BTC$23.01
0.0068469 Eth
$172,727.00
7,507.450 LINK
0.0321%
82
BYDFi
LINK-USDC$22.92
0.0068293 Eth
$164,465.00
7,174.760 LINK
0.0307%
83
BTCMarkets
LINK-AUD$23.12
0.0068508 Eth
$152,928.00
6,614.497 LINK
0.0283%
84
BitStorage
LINK-ETH$22.99
0.0068405 Eth
$149,109.00
6,486.930 LINK
0.0277%
85
BitMart
LINK-ETH$23.13
0.0068572 Eth
$148,533.00
6,422.600 LINK
0.0275%
86
Binance US
LINK-USDT$23.12
0.0068570 Eth
$138,577.00
5,992.968 LINK
0.0256%
87
KuCoin
LINK-USDC$23.11
0.0068528 Eth
$127,713.00
5,526.246 LINK
0.0236%
88
OKX
LINK-EUR$23.09
0.0068463 Eth
$110,117.00
4,790.264 LINK
0.0205%
89
Coins.ph
LINK-PHP$23.38
0.0069244 Eth
$103,591.00
4,446.430 LINK
0.0190%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.13
0.0068562 Eth
$102,207.00
4,425.729 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0189%
91
Bitso
LINK-USD$22.99
0.0068479 Eth
$99,324.00
4,319.564 LINK
0.0185%
92
Coinbase Exchange
LINK-ETH$23.04
0.0068296 Eth
$93,935.00
4,077.260 LINK
0.0174%
93
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.03
0.0068264 Eth
$77,132.00
77,296.688 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3304%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.19
0.0068736 Eth
$75,717.00
3,289.332 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0141%
95
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.13
0.0068548 Eth
$61,173.00
2,664.377 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0114%
96
Hotcoin
LINK-ETH$23.00
0.0068451 Eth
$59,777.00
2,598.880 LINK
0.0111%
97
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.12
0.0068537 Eth
$58,835.00
4,358.123 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0186%
98
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.11
0.0068516 Eth
$56,069.00
2,437.105 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0104%
99
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$22.99
0.0068148 Eth
$53,668.00
2,325.918 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0099%
100
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.08
0.0068413 Eth
$21,092.00
911.143 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0039%

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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