ETH Price: $3,275.64 (-5.74%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

727,076 ( 0.022%)

Market

Price

$23.68 @ 0.007229 ETH (-4.62%)

Onchain Market Cap

$23,680,000,000.00

Circulating Supply Market Cap

$14,964,309,073.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.969999 LINK

Value
$22.97 ( ~0.00701236741049308 Eth) [0.0000%]
0xe66cb1b44839672e71bb4554be21e3e41df15c59
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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 21427.27% |ETH 0.0003846 1779.62%

Market

Volume (24H):$1,202,451,658.00
Market Capitalization:$14,964,309,073.00
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
Coinbase Exchange
LINK-USD$23.67
0.0072236 Eth
$85,298,605.00
3,603,963.380 LINK
14.6059%
2
Bybit
LINK-USDT$23.67
0.0072259 Eth
$47,440,886.00
1,955,667.165 LINK
7.9258%
3
P2B
LINK-USDT$23.67
0.0072299 Eth
$34,694,742.00
1,466,055.000 LINK
5.9415%
4
Slex
LINK-USDT$23.63
0.0072147 Eth
$24,363,708.00
1,003,910.850 LINK
4.0686%
5
OKX
LINK-USDT$23.66
0.0072243 Eth
$22,094,206.00
909,905.072 LINK
3.6876%
6
DigiFinex
LINK-USDT$23.68
0.0072296 Eth
$21,540,343.00
909,587.740 LINK
3.6863%
7
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.62
0.0072206 Eth
$19,844,914.00
832,485.600 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.3738%
8
Gate.io
LINK-USDT$23.68
0.0072289 Eth
$18,726,618.00
772,148.440 LINK
3.1293%
9
XT.COM
LINK-USDT$23.75
0.0072544 Eth
$17,639,962.00
727,069.380 LINK
2.9466%
10
Azbit
LINK-USDT$23.63
0.0072147 Eth
$17,511,154.00
721,751.263 LINK
2.9251%
11
HTX
LINK-USDT$23.69
0.0072333 Eth
$17,481,278.00
720,761.914 LINK
2.9210%
12
Coinstore
LINK-USDT$23.76
0.0072536 Eth
$15,151,297.00
624,813.980 LINK
2.5322%
13
MEXC
LINK-USDT$23.63
0.0072105 Eth
$14,861,838.00
629,034.880 LINK
2.5493%
14
Bitunix
LINK-USDT$23.67
0.0072285 Eth
$12,960,534.00
547,667.260 LINK
2.2195%
15
CoinW
LINK-USDT$23.66
0.0072244 Eth
$11,454,495.00
484,201.760 LINK
1.9623%
16
Kraken
LINK-USD$23.68
0.0072306 Eth
$10,016,733.00
423,062.003 LINK
1.7146%
17
BYDFi
LINK-USDT$23.66
0.0072246 Eth
$9,652,603.00
408,041.160 LINK
1.6537%
18
BTSE
LINK-USDT$23.60
0.0072045 Eth
$8,816,291.00
373,540.969 LINK
1.5139%
19
LATOKEN
LINK-USDT$23.79
0.0072641 Eth
$8,765,630.00
368,445.581 LINK
1.4932%
20
KuCoin
LINK-USDT$23.68
0.0072279 Eth
$8,645,197.00
365,049.615 LINK
1.4794%
21
LBank
LINK-USDT$23.64
0.0072202 Eth
$8,510,267.00
360,018.940 LINK
1.4591%
22
Binance
LINK-USDC$23.74
0.0072520 Eth
$8,413,589.00
347,344.560 LINK
1.4077%
23
QMall
LINK-USDT$23.68
0.0072329 Eth
$7,225,841.00
297,715.354 LINK
1.2066%
24
Hotcoin
LINK-USDT$23.68
0.0072334 Eth
$6,397,894.00
270,213.300 LINK
1.0951%
25
Coinbase Exchange
LINK-EUR$23.63
0.0072158 Eth
$6,029,095.00
255,130.410 LINK
1.0340%
26
Coinbase Exchange
LINK-USDT$23.72
0.0072421 Eth
$5,751,539.00
242,525.198 LINK
0.9829%
27
Dex-Trade
LINK-USDT$23.63
0.0072228 Eth
$5,506,530.00
233,024.880 LINK
0.9444%
28
FMCPAY
LINK-USDT$23.64
0.0072177 Eth
$4,562,559.00
187,711.518 LINK
0.7607%
29
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.63
0.0072166 Eth
$4,222,356.00
177,097.140 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.7177%
30
CoinEx
LINK-USDT$23.73
0.0072497 Eth
$4,111,173.00
169,956.709 LINK
0.6888%
31
Bitvavo
LINK-EUR$23.67
0.0072247 Eth
$3,849,924.00
162,681.831 LINK
0.6593%
32
PointPay
LINK-USDT$23.62
0.0072132 Eth
$2,792,527.00
115,128.580 LINK
0.4666%
33
Biconomy.com
LINK-USDT$23.65
0.0072235 Eth
$2,736,683.00
112,700.810 LINK
0.4567%
34
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.66
0.0072268 Eth
$2,096,804.00
88,275.172 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3578%
35
Phemex
LINK-USDT$23.66
0.0072320 Eth
$1,946,592.00
82,275.720 LINK
0.3334%
36
Coinbase Exchange
LINK-GBP$23.66
0.0072251 Eth
$1,867,201.00
78,911.870 LINK
0.3198%
37
FMCPAY
LINK-ETH$23.63
0.0072209 Eth
$1,859,221.00
77,999.280 LINK
0.3161%
38
FMCPAY
LINK-BTC$23.66
0.0072288 Eth
$1,824,180.00
75,041.500 LINK
0.3041%
39
ProBit Global
LINK-USDT$23.65
0.0072205 Eth
$1,716,372.00
72,569.066 LINK
0.2941%
40
Kraken
LINK-EUR$23.61
0.0072090 Eth
$1,710,919.00
72,478.224 LINK
0.2937%
41
AscendEX (BitMax)
LINK-USDT$23.61
0.0072057 Eth
$1,670,434.00
70,752.300 LINK
0.2867%
42
EXMO
LINK-USDT$23.71
0.0072360 Eth
$1,646,240.00
69,436.025 LINK
0.2814%
43
BitStorage
LINK-USDT$23.62
0.0072141 Eth
$1,369,896.00
58,001.180 LINK
0.2351%
44
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.64
0.0072206 Eth
$1,284,074.00
52,910.004 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2144%
45
Bitbank
LINK-JPY$23.71
0.0072404 Eth
$1,269,586.00
53,554.088 LINK
0.2170%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.62
0.0072124 Eth
$1,229,642.00
51,521.945 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2088%
47
Kraken
LINK-USDT$23.67
0.0072300 Eth
$1,215,085.00
51,324.369 LINK
0.2080%
48
Binance
LINK-TRY$23.86
0.0072814 Eth
$1,151,159.00
47,227.000 LINK
0.1914%
49
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.62
0.0072206 Eth
$1,125,588.00
80,616.854 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3267%
50
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$23.64
0.0072161 Eth
$1,116,215.00
46,064.799 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1867%
51
Coinbase Exchange
LINK-ETH$23.72
0.0072478 Eth
$1,078,936.00
45,477.620 LINK
0.1843%
52
EarnBIT
LINK-USDT$23.60
0.0072077 Eth
$1,034,764.00
42,657.327 LINK
0.1729%
53
Gemini
LINK-USD$23.69
0.0072310 Eth
$1,004,582.00
42,412.487 LINK
0.1719%
54
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.62
0.0072149 Eth
$1,004,293.00
1,028,488.197 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
4.1682%
55
Binance
LINK-EUR$23.60
0.0072050 Eth
$997,623.00
41,327.070 LINK
0.1675%
56
itBit
LINK-USD$23.69
0.0072425 Eth
$991,092.00
41,835.873 LINK
0.1695%
57
tanX
LINK-USDC$23.69
0.0072364 Eth
$990,799.00
40,618.570 LINK
0.1646%
58
Bybit
LINK-USDC$23.68
0.0072292 Eth
$917,876.00
37,881.850 LINK
0.1535%
59
BigONE
LINK-USDT$23.68
0.0072355 Eth
$890,742.00
37,609.980 LINK
0.1524%
60
Trubit
LINK-USDT$23.60
0.0072071 Eth
$864,011.00
35,680.960 LINK
0.1446%
61
LATOKEN
LINK-BTC$23.68
0.0072360 Eth
$820,356.00
34,644.793 LINK
0.1404%
62
QMall
LINK-USDC$23.67
0.0072320 Eth
$689,334.00
28,470.579 LINK
0.1154%
63
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.62
0.0072124 Eth
$673,638.00
691,931.800 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
2.8042%
64
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.61
0.0072129 Eth
$618,204.00
25,956.970 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1052%
65
ProBit Global
LINK-BTC$23.65
0.0072191 Eth
$605,692.00
25,614.171 LINK
0.1038%
66
GMO Japan
LINK-JPY$23.60
0.0072079 Eth
$579,269.00
24,547.300 LINK
0.0995%
67
Bitso
LINK-USD$23.63
0.0072164 Eth
$569,688.00
24,112.860 LINK
0.0977%
68
Kraken
LINK-ETH$23.64
0.0072193 Eth
$552,289.00
23,362.720 LINK
0.0947%
69
Coinbase Exchange
LINK-BTC$23.66
0.0072290 Eth
$454,366.00
19,202.020 LINK
0.0778%
70
OKX
LINK-USDC$23.67
0.0072268 Eth
$434,281.00
17,909.674 LINK
0.0726%
71
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.85
0.0072855 Eth
$428,429.00
17,986.759 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0729%
72
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.68
0.0072356 Eth
$382,063.00
15,714.492 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0637%
73
BitDelta
LINK-USDT$23.68
0.0072329 Eth
$338,866.00
13,962.000 LINK
0.0566%
74
bitcastle
LINK-USDT$23.65
0.0072208 Eth
$334,824.00
13,804.240 LINK
0.0559%
75
Slex
LINK-ETH$23.65
0.0072211 Eth
$326,280.00
13,658.620 LINK
0.0554%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.67
0.0072272 Eth
$325,190.00
13,617.156 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0552%
77
PointPay
LINK-BTC$23.61
0.0072104 Eth
$320,461.00
13,161.384 LINK
0.0533%
78
HashKey Exchange
LINK-USD$23.72
0.0072438 Eth
$304,140.00
12,434.494 LINK
0.0504%
79
BitMart
LINK-BTC$23.67
0.0072270 Eth
$289,229.00
12,217.880 LINK
0.0495%
80
BitStorage
LINK-ETH$23.60
0.0072110 Eth
$276,554.00
11,716.700 LINK
0.0475%
81
Bitvavo
LINK-USDC$23.58
0.0072068 Eth
$250,268.00
10,613.829 LINK
0.0430%
82
Kraken
LINK-GBP$23.63
0.0072168 Eth
$237,718.00
10,059.398 LINK
0.0408%
83
Hotcoin
LINK-BTC$23.67
0.0072309 Eth
$231,895.00
9,797.560 LINK
0.0397%
84
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.61
0.0072174 Eth
$231,706.00
9,490.575 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0385%
85
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.63
0.0072226 Eth
$222,337.00
9,339.391 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0378%
86
Uniswap V2 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.63
0.0072133 Eth
$218,361.00
9,133.830 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0370%
87
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.62
0.0072124 Eth
$207,327.00
8,551.394 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0347%
88
Binance US
LINK-USDT$23.64
0.0072151 Eth
$205,541.00
8,694.468 LINK
0.0352%
89
KuCoin
LINK-USDC$23.61
0.0072048 Eth
$196,852.00
8,338.931 LINK
0.0338%
90
BYDFi
LINK-USDC$23.70
0.0072338 Eth
$193,115.00
8,147.340 LINK
0.0330%
91
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.62
0.0072125 Eth
$190,381.00
7,823.756 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0317%
92
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.64
0.0072206 Eth
$177,321.00
181,762.854 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.7366%
93
Binance
LINK-BRL$23.84
0.0072834 Eth
$159,163.00
6,575.650 LINK
0.0266%
94
CoinEx
LINK-USDC$23.63
0.0072140 Eth
$155,678.00
6,470.066 LINK
0.0262%
95
Mercado Bitcoin
LINK-BRL$23.70
0.0072377 Eth
$146,077.00
6,162.739 LINK
0.0250%
96
KuCoin
LINK-BTC$23.61
0.0072047 Eth
$133,811.00
5,668.465 LINK
0.0230%
97
BitMart
LINK-ETH$23.69
0.0072322 Eth
$114,445.00
4,831.000 LINK
0.0196%
98
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.71
0.0072430 Eth
$81,979.00
3,439.498 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0139%
99
Coins.ph
LINK-PHP$23.75
0.0072565 Eth
$78,143.00
3,223.679 LINK
0.0131%
100
HTX
LINK-BTC$23.70
0.0072360 Eth
$30,447.00
1,248.431 LINK
0.0051%

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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