ETH Price: $1,816.06 (+1.83%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

750,020 ( -0.027%)

Market

Price

$12.99 @ 0.007153 ETH (+1.67%)

Onchain Market Cap

$12,990,000,000.00

Circulating Supply Market Cap

$8,297,841,276.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x8db8fb5658e1c582991af771d2b8be597bbb7658
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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 11709.09% |ETH 0.0003846 1759.85%

Market

Volume (24H):$451,967,523.00
Market Capitalization:$8,297,841,276.00
Circulating Supply:638,099,971.00 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$13.00
0.0071561 Eth
$45,213,111.00
3,543,937.640 LINK
17.2736%
2
Coinbase Exchange
LINK-USD$13.01
0.0071612 Eth
$33,424,089.00
2,569,700.080 LINK
12.5250%
3
MEXC
LINK-USDT$13.01
0.0071573 Eth
$19,434,868.00
1,494,368.660 LINK
7.2837%
4
Gate.io
LINK-USDT$13.00
0.0071572 Eth
$12,232,649.00
962,169.540 LINK
4.6897%
5
KuCoin
LINK-USDT$13.01
0.0071616 Eth
$11,253,663.00
865,247.978 LINK
4.2173%
6
HTX
LINK-USDT$13.00
0.0071599 Eth
$10,248,860.00
800,552.573 LINK
3.9020%
7
P2B
LINK-USDT$13.00
0.0071561 Eth
$9,252,549.00
711,937.810 LINK
3.4701%
8
Binance
LINK-USDC$13.01
0.0071592 Eth
$8,542,732.00
670,826.260 LINK
3.2697%
9
CoinW
LINK-USDT$12.98
0.0071472 Eth
$8,233,368.00
634,224.860 LINK
3.0913%
10
Slex
LINK-USDT$13.00
0.0071560 Eth
$7,429,827.00
578,709.240 LINK
2.8207%
11
OKX
LINK-USDT$13.00
0.0071603 Eth
$7,232,386.00
567,883.640 LINK
2.7679%
12
Binance
LINK-FDUSD$13.00
0.0071554 Eth
$6,064,308.00
475,031.260 LINK
2.3154%
13
DigiFinex
LINK-USDT$13.00
0.0071604 Eth
$5,953,702.00
457,829.110 LINK
2.2315%
14
Bybit
LINK-USDT$13.01
0.0071616 Eth
$5,702,860.00
445,791.277 LINK
2.1728%
15
Hotcoin
LINK-USDT$12.98
0.0071440 Eth
$4,970,320.00
383,039.990 LINK
1.8670%
16
MEXC
LINK-EUR$12.97
0.0071381 Eth
$4,867,932.00
375,458.730 LINK
1.8300%
17
WhiteBIT
LINK-USDT$12.97
0.0071414 Eth
$4,725,856.00
364,338.990 LINK
1.7758%
18
MEXC
LINK-USDC$13.01
0.0071612 Eth
$4,638,423.00
356,562.330 LINK
1.7379%
19
XT.COM
LINK-USDT$13.00
0.0071548 Eth
$4,543,307.00
356,083.840 LINK
1.7356%
20
Coinstore
LINK-USDT$12.98
0.0071463 Eth
$4,515,194.00
354,029.560 LINK
1.7256%
21
BYDFi
LINK-USDT$13.02
0.0071469 Eth
$2,797,687.00
214,943.920 LINK
1.0477%
22
Azbit
LINK-USDT$12.98
0.0071440 Eth
$2,747,361.00
215,366.766 LINK
1.0497%
23
BTSE
LINK-USDT$13.01
0.0071617 Eth
$2,746,744.00
211,184.066 LINK
1.0293%
24
Bitunix
LINK-USDT$13.01
0.0071611 Eth
$2,689,201.00
206,760.800 LINK
1.0078%
25
Coinbase Exchange
LINK-ETH$13.03
0.0071722 Eth
$2,217,803.00
170,252.410 LINK
0.8298%
26
AscendEX (BitMax)
LINK-USDT$12.93
0.0071195 Eth
$1,792,068.00
138,574.700 LINK
0.6754%
27
QMall
LINK-USDT$12.99
0.0071464 Eth
$1,784,111.00
139,856.075 LINK
0.6817%
28
Bitvavo
LINK-EUR$13.01
0.0071622 Eth
$1,720,423.00
132,258.510 LINK
0.6446%
29
Hibt
LINK-USDT$13.00
0.0071604 Eth
$1,638,862.00
128,683.245 LINK
0.6272%
30
Coinbase Exchange
LINK-EUR$13.01
0.0071628 Eth
$1,549,899.00
119,139.350 LINK
0.5807%
31
Dex-Trade
LINK-USDT$12.99
0.0071502 Eth
$1,487,460.00
114,547.410 LINK
0.5583%
32
Biconomy.com
LINK-USDT$12.99
0.0071523 Eth
$1,385,014.00
108,374.927 LINK
0.5282%
33
Dcoin
LINK-USDT$13.03
0.0071650 Eth
$1,306,265.00
100,286.000 LINK
0.4888%
34
FMCPAY
LINK-USDT$12.98
0.0071439 Eth
$1,145,002.00
89,619.674 LINK
0.4368%
35
Binance
LINK-ETH$12.99
0.0071514 Eth
$1,032,809.00
80,195.680 LINK
0.3909%
36
Tapbit
LINK-USDT$12.99
0.0071435 Eth
$997,254.00
77,710.480 LINK
0.3788%
37
Coinbase Exchange
LINK-GBP$12.96
0.0071366 Eth
$972,802.00
75,048.470 LINK
0.3658%
38
FMCPAY
LINK-ETH$13.00
0.0071592 Eth
$886,313.00
68,716.480 LINK
0.3349%
39
FMCPAY
LINK-BTC$12.99
0.0071515 Eth
$661,959.00
51,564.600 LINK
0.2513%
40
QMall
LINK-USDC$12.99
0.0071537 Eth
$653,950.00
51,336.246 LINK
0.2502%
41
Tokpie
LINK-USDT$13.00
0.0071546 Eth
$605,537.00
46,596.010 LINK
0.2271%
42
LATOKEN
LINK-USDT$12.99
0.0071545 Eth
$590,937.00
45,475.467 LINK
0.2217%
43
tanX
LINK-USDC$12.98
0.0071492 Eth
$574,568.00
44,749.160 LINK
0.2181%
44
Coinbase Exchange
LINK-BTC$12.99
0.0071520 Eth
$530,982.00
40,880.560 LINK
0.1993%
45
CoinEx
LINK-USDT$12.99
0.0071565 Eth
$506,521.00
39,651.521 LINK
0.1933%
46
BigONE
LINK-USDT$13.01
0.0071588 Eth
$504,718.00
38,786.870 LINK
0.1891%
47
Phemex
LINK-USDT$12.97
0.0071439 Eth
$496,823.00
38,290.950 LINK
0.1866%
48
Coinbase Exchange
LINK-USDT$12.98
0.0071438 Eth
$495,274.00
38,167.172 LINK
0.1860%
49
EXMO
LINK-USDT$13.01
0.0071650 Eth
$449,192.00
34,521.562 LINK
0.1683%
50
Gemini
LINK-USD$12.98
0.0071481 Eth
$432,983.00
33,352.877 LINK
0.1626%
51
Bitbank
LINK-JPY$13.02
0.0071685 Eth
$374,757.00
28,785.288 LINK
0.1403%
52
EarnBIT
LINK-USDT$12.99
0.0071547 Eth
$345,790.00
27,172.628 LINK
0.1324%
53
BitMart
LINK-BTC$12.99
0.0071515 Eth
$335,191.00
25,807.980 LINK
0.1258%
54
Bybit
LINK-USDC$13.01
0.0071632 Eth
$305,292.00
23,927.685 LINK
0.1166%
55
XT.COM
LINK-ETH$13.02
0.0071618 Eth
$294,487.00
22,833.250 LINK
0.1113%
56
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.00
0.0071562 Eth
$278,240.00
21,551.984 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1050%
57
OKX
LINK-USDC$13.01
0.0071615 Eth
$264,311.00
20,627.313 LINK
0.1005%
58
WhiteBIT
LINK-TRY$13.01
0.0071610 Eth
$261,358.00
20,094.460 LINK
0.0979%
59
BitStorage
LINK-ETH$13.00
0.0071592 Eth
$254,622.00
19,582.780 LINK
0.0954%
60
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.94
0.0071240 Eth
$235,589.00
18,340.133 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0894%
61
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.96
0.0071368 Eth
$218,667.00
17,711.384 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0863%
62
WhiteBIT
LINK-BTC$13.01
0.0071606 Eth
$217,185.00
16,699.270 LINK
0.0814%
63
Slex
LINK-ETH$13.00
0.0071536 Eth
$211,756.00
16,400.210 LINK
0.0799%
64
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.96
0.0071374 Eth
$195,835.00
15,185.101 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0740%
65
GMO Japan
LINK-JPY$12.96
0.0071362 Eth
$194,201.00
14,983.000 LINK
0.0730%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.99
0.0071520 Eth
$193,838.00
15,059.115 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0734%
67
CoinTR
LINK-TRY$12.99
0.0071550 Eth
$192,223.00
14,954.930 LINK
0.0729%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.02
0.0071663 Eth
$191,784.00
14,898.762 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0726%
69
BitDelta
LINK-USDT$12.98
0.0071439 Eth
$184,311.00
14,409.000 LINK
0.0702%
70
BYDFi
LINK-USDC$12.97
0.0071384 Eth
$183,357.00
14,137.490 LINK
0.0689%
71
Hotcoin
LINK-BTC$13.00
0.0071563 Eth
$160,957.00
12,378.400 LINK
0.0603%
72
Bitci TR
LINK-TRY$12.97
0.0071393 Eth
$134,507.00
10,450.850 LINK
0.0509%
73
BitMart
LINK-ETH$12.99
0.0071539 Eth
$112,419.00
8,652.720 LINK
0.0422%
74
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$13.00
0.0071605 Eth
$103,399.00
8,098.164 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0395%
75
Tokenize
LINK-ETH$12.94
0.0071246 Eth
$95,226.00
7,358.410 LINK
0.0359%
76
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$13.03
0.0071762 Eth
$92,261.00
90,233.853 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4398%
77
bitcastle
LINK-USDT$12.98
0.0071487 Eth
$91,873.00
7,192.030 LINK
0.0351%
78
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.93
0.0071210 Eth
$86,362.00
7,113.999 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0347%
79
Bitkub
LINK-THB$12.91
0.0071096 Eth
$82,038.00
6,353.181 LINK
0.0310%
80
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$13.01
0.0071537 Eth
$82,024.00
6,433.003 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0314%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$13.03
0.0071767 Eth
$73,175.00
5,748.928 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0280%
82
Bitso
LINK-USD$13.01
0.0071636 Eth
$67,326.00
5,174.229 LINK
0.0252%
83
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.98
0.0071491 Eth
$45,879.00
3,563.763 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0174%
84
Aerodrome SlipStream
0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196-0X4200000000000000000000000000000000000006$12.97
0.0071408 Eth
$42,623.00
3,307.007 0X88FB150BDC53A65FE94DEA0C9BA0A6DAF8C6E196
0.0161%
85
WhiteBIT
LINK-EUR$13.01
0.0071616 Eth
$40,589.00
3,120.290 LINK
0.0152%
86
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.96
0.0071377 Eth
$37,656.00
2,923.738 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0143%
87
Bitcointry
LINK-USDT$12.98
0.0071441 Eth
$36,190.00
2,829.141 LINK
0.0138%
88
Dex-Trade
LINK-ETH$12.99
0.0071534 Eth
$34,722.00
2,672.450 LINK
0.0130%
89
Backpack Exchange
LINK-USDC$12.98
0.0071490 Eth
$31,838.00
2,487.991 LINK
0.0121%
90
Bittime
LINK-IDR$12.89
0.0070986 Eth
$30,695.00
2,402.500 LINK
0.0117%
91
Bittime
LINK-USDT$13.00
0.0071583 Eth
$30,363.00
2,364.880 LINK
0.0115%
92
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$12.91
0.0071090 Eth
$28,478.00
2,223.981 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0108%
93
Hotcoin
LINK-ETH$13.01
0.0071612 Eth
$27,720.00
2,131.250 LINK
0.0104%
94
Mercado Bitcoin
LINK-BRL$13.05
0.0071837 Eth
$27,260.00
2,089.254 LINK
0.0102%
95
EXMO
LINK-BTC$13.01
0.0071649 Eth
$24,957.00
1,918.063 LINK
0.0093%
96
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$13.01
0.0071642 Eth
$24,835.00
24,372.119 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1188%
97
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$13.02
0.0071686 Eth
$23,036.00
1,798.614 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0088%
98
Uniswap V4 (Ethereum)
0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48-0X514910771AF9CA656AF840DFF83E8264ECF986CA$13.00
0.0071590 Eth
$18,053.02
17,536.539 0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48
0.0855%
99
Uniswap V4 (Ethereum)
0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A-0X514910771AF9CA656AF840DFF83E8264ECF986CA$13.00
0.0071581 Eth
$16,958.29
16,617.661 0X4274CD7277C7BB0806BD5FE84B9ADAE466A8DA0A
0.0810%
100
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.95
0.0071329 Eth
$15,050.71
1,182.977 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0058%

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

API
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Deployed Bytecode

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Swarm Source

bzzr://c5f438ff94e5ddaf2058efa0019e246c636c37a622e04bb67827c7374acad8d6
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