ETH Price: $2,661.84 (-3.00%)
Gas: 0.76 Gwei

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

736,421 ( 0.023%)

Market

Price

$17.72 @ 0.006657 ETH (-7.37%)

Onchain Market Cap

$17,720,000,000.00

Circulating Supply Market Cap

$11,301,531,178.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
46.693 LINK

Value
$827.40 ( ~0.310837298269535 Eth) [0.0000%]
0xEd1AB5404b94b3DAA7Ee4d40C2283FEBd5156E8d
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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 16009.09% |ETH 0.0003846 1630.89%

Market

Volume (24H):$691,569,680.00
Market Capitalization:$11,301,531,178.00
Circulating Supply:638,099,970.00 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$17.68
0.0066586 Eth
$79,986,034.00
4,437,835.900 LINK
17.0526%
2
MEXC
LINK-USDT$17.77
0.0066816 Eth
$46,256,499.00
2,602,961.520 LINK
10.0020%
3
Coinbase Exchange
LINK-USD$17.69
0.0066621 Eth
$29,869,860.00
1,688,134.980 LINK
6.4867%
4
Bybit
LINK-USDT$17.77
0.0066805 Eth
$27,498,499.00
1,520,510.541 LINK
5.8426%
5
HTX
LINK-USDT$17.77
0.0066805 Eth
$19,878,624.00
1,096,139.063 LINK
4.2120%
6
P2B
LINK-USDT$17.71
0.0066658 Eth
$15,858,708.00
895,572.360 LINK
3.4413%
7
Kraken
LINK-USD$17.77
0.0066786 Eth
$13,510,417.00
760,494.743 LINK
2.9222%
8
Bitget
LINK-USDT$17.77
0.0066800 Eth
$11,397,589.00
633,298.581 LINK
2.4335%
9
Slex
LINK-USDT$17.72
0.0066628 Eth
$10,609,349.00
585,887.280 LINK
2.2513%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$17.73
0.0066671 Eth
$9,999,498.00
555,931.752 0X514910771AF9CA656AF840DFF83E8264ECF986CA
2.1362%
11
DigiFinex
LINK-USDT$17.76
0.0066790 Eth
$9,747,632.00
548,709.720 LINK
2.1084%
12
MEXC
LINK-EUR$17.68
0.0066598 Eth
$9,458,275.00
534,835.260 LINK
2.0551%
13
Gate.io
LINK-USDT$17.77
0.0066816 Eth
$9,398,206.00
522,548.020 LINK
2.0079%
14
OKX
LINK-USDT$17.76
0.0066778 Eth
$9,268,225.00
512,672.680 LINK
1.9700%
15
MEXC
LINK-USDC$17.77
0.0066852 Eth
$8,885,857.00
500,143.710 LINK
1.9218%
16
KuCoin
LINK-USDT$17.77
0.0066827 Eth
$8,330,396.00
468,852.358 LINK
1.8016%
17
XT.COM
LINK-USDT$17.71
0.0066679 Eth
$7,981,341.00
442,397.710 LINK
1.6999%
18
Coinstore
LINK-USDT$17.71
0.0066669 Eth
$6,817,026.00
378,307.270 LINK
1.4537%
19
CoinW
LINK-USDT$17.78
0.0066863 Eth
$6,266,534.00
352,384.660 LINK
1.3541%
20
Binance
LINK-FDUSD$17.72
0.0066707 Eth
$5,949,098.00
330,091.530 LINK
1.2684%
21
WhiteBIT
LINK-USDT$17.71
0.0066726 Eth
$5,644,891.00
318,752.110 LINK
1.2248%
22
Binance
LINK-USDC$17.72
0.0066712 Eth
$5,378,167.00
299,435.180 LINK
1.1506%
23
Hotcoin
LINK-USDT$17.73
0.0066755 Eth
$5,053,143.00
284,976.900 LINK
1.0950%
24
Azbit
LINK-USDT$17.74
0.0066688 Eth
$4,778,605.00
265,095.137 LINK
1.0186%
25
Bitunix
LINK-USDT$17.77
0.0066819 Eth
$4,622,090.00
260,145.300 LINK
0.9996%
26
BYDFi
LINK-USDT$17.74
0.0066785 Eth
$4,399,634.00
248,074.030 LINK
0.9532%
27
BTSE
LINK-USDT$17.73
0.0066737 Eth
$4,134,719.00
233,181.533 LINK
0.8960%
28
LBank
LINK-USDT$17.71
0.0066643 Eth
$3,862,022.00
218,126.260 LINK
0.8382%
29
LATOKEN
LINK-USDT$17.72
0.0066683 Eth
$3,773,967.00
213,025.875 LINK
0.8186%
30
Coinbase Exchange
LINK-GBP$17.69
0.0066612 Eth
$3,742,075.00
211,558.470 LINK
0.8129%
31
QMall
LINK-USDT$17.71
0.0066696 Eth
$3,255,493.00
180,753.981 LINK
0.6946%
32
FMCPAY
LINK-USDT$17.71
0.0066643 Eth
$2,898,439.00
159,754.753 LINK
0.6139%
33
Bitvavo
LINK-EUR$17.74
0.0066765 Eth
$2,833,002.00
159,724.240 LINK
0.6137%
34
Dex-Trade
LINK-USDT$17.70
0.0066640 Eth
$2,494,076.00
140,941.920 LINK
0.5416%
35
CoinEx
LINK-USDT$17.74
0.0066816 Eth
$2,350,232.00
130,706.280 LINK
0.5022%
36
Coinbase Exchange
LINK-EUR$17.69
0.0066637 Eth
$2,247,393.00
127,007.850 LINK
0.4880%
37
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.70
0.0066580 Eth
$2,182,138.00
121,717.208 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4677%
38
Binance
LINK-BTC$17.71
0.0066705 Eth
$1,648,802.00
91,948.670 LINK
0.3533%
39
Biconomy.com
LINK-USDT$17.68
0.0066549 Eth
$1,537,129.00
84,827.040 LINK
0.3260%
40
FMCPAY
LINK-BTC$17.72
0.0066697 Eth
$1,205,293.00
66,502.900 LINK
0.2555%
41
PointPay
LINK-USDT$17.71
0.0066696 Eth
$1,198,025.00
66,536.697 LINK
0.2557%
42
Binance
LINK-ETH$17.72
0.0066737 Eth
$1,193,752.00
66,960.500 LINK
0.2573%
43
FMCPAY
LINK-ETH$17.69
0.0066594 Eth
$1,179,027.00
65,553.920 LINK
0.2519%
44
Gemini
LINK-USD$17.66
0.0066413 Eth
$905,237.00
51,249.155 LINK
0.1969%
45
tanX
LINK-USDC$17.69
0.0066575 Eth
$871,910.00
47,969.530 LINK
0.1843%
46
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.71
0.0066572 Eth
$857,166.00
861,904.381 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
3.3119%
47
Phemex
LINK-USDT$17.73
0.0066755 Eth
$832,095.00
46,926.800 LINK
0.1803%
48
EXMO
LINK-USDT$17.75
0.0066774 Eth
$809,073.00
45,571.973 LINK
0.1751%
49
Trubit
LINK-USDT$17.75
0.0066722 Eth
$802,173.00
44,276.710 LINK
0.1701%
50
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$17.83
0.0067044 Eth
$773,309.00
42,407.681 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1630%
51
WhiteBIT
LINK-BTC$17.68
0.0066591 Eth
$722,414.00
40,849.810 LINK
0.1570%
52
BigONE
LINK-USDT$17.74
0.0066758 Eth
$666,798.00
37,592.550 LINK
0.1445%
53
Bitbank
LINK-JPY$17.75
0.0066829 Eth
$658,113.00
37,066.668 LINK
0.1424%
54
LATOKEN
LINK-BTC$17.72
0.0066707 Eth
$638,231.00
36,012.848 LINK
0.1384%
55
Binance
LINK-EUR$17.81
0.0066975 Eth
$635,816.00
35,304.360 LINK
0.1357%
56
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$17.66
0.0066387 Eth
$632,035.00
35,091.023 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1348%
57
BitStorage
LINK-USDT$17.71
0.0066650 Eth
$628,117.00
35,469.380 LINK
0.1363%
58
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$17.69
0.0066490 Eth
$613,190.00
34,323.826 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1319%
59
Azbit
LINK-ETH$17.72
0.0066739 Eth
$595,069.00
33,013.278 LINK
0.1269%
60
OKX
LINK-USDC$17.77
0.0066802 Eth
$506,059.00
28,575.503 LINK
0.1098%
61
itBit
LINK-USD$17.66
0.0066506 Eth
$492,424.00
27,883.566 LINK
0.1071%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.67
0.0066434 Eth
$478,939.00
26,732.251 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1027%
63
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.68
0.0066465 Eth
$478,062.00
490,312.751 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.8840%
64
EarnBIT
LINK-USDT$17.78
0.0066853 Eth
$441,821.00
24,437.241 LINK
0.0939%
65
QMall
LINK-USDC$17.71
0.0066674 Eth
$437,701.00
24,406.703 LINK
0.0938%
66
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.71
0.0066601 Eth
$425,666.00
23,394.994 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0899%
67
Binance
LINK-TRY$17.76
0.0066849 Eth
$412,978.00
23,000.720 LINK
0.0884%
68
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$17.70
0.0066557 Eth
$396,435.00
22,007.760 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0846%
69
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$17.72
0.0066599 Eth
$388,261.00
41,558.732 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.1597%
70
Bybit
LINK-USDC$17.66
0.0066412 Eth
$362,601.00
20,024.965 LINK
0.0769%
71
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$17.72
0.0066598 Eth
$349,488.00
19,480.784 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0749%
72
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$17.76
0.0066862 Eth
$322,004.00
17,883.993 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0687%
73
Coinbase Exchange
LINK-USDT$17.70
0.0066662 Eth
$302,093.00
17,062.684 LINK
0.0656%
74
BitDelta
LINK-USDT$17.72
0.0066681 Eth
$282,834.00
15,644.000 LINK
0.0601%
75
BitStorage
LINK-ETH$17.72
0.0066631 Eth
$265,904.00
15,002.330 LINK
0.0576%
76
BitMart
LINK-BTC$17.76
0.0066794 Eth
$242,701.00
13,661.840 LINK
0.0525%
77
Binance US
LINK-USDT$17.76
0.0066766 Eth
$238,270.00
13,415.706 LINK
0.0516%
78
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.73
0.0066671 Eth
$224,838.00
12,424.838 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0477%
79
Slex
LINK-ETH$17.75
0.0066726 Eth
$219,192.00
12,254.650 LINK
0.0471%
80
Bitci TR
LINK-TRY$17.88
0.0067282 Eth
$186,593.00
10,250.780 LINK
0.0394%
81
WhiteBIT
LINK-EUR$17.77
0.0066869 Eth
$184,036.00
10,355.840 LINK
0.0398%
82
Hotcoin
LINK-BTC$17.71
0.0066671 Eth
$180,711.00
10,202.280 LINK
0.0392%
83
BYDFi
LINK-USDC$17.71
0.0066696 Eth
$166,765.00
9,414.990 LINK
0.0362%
84
bitcastle
LINK-USDT$17.65
0.0066474 Eth
$161,569.00
8,969.710 LINK
0.0345%
85
CoinTR
LINK-TRY$17.72
0.0066737 Eth
$160,939.00
8,880.910 LINK
0.0341%
86
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$17.72
0.0066712 Eth
$149,339.00
8,263.858 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0318%
87
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$17.74
0.0066707 Eth
$125,224.00
6,937.348 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0267%
88
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$17.79
0.0066907 Eth
$122,015.00
6,809.987 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0262%
89
Coinbase Exchange
LINK-BTC$17.73
0.0066671 Eth
$118,658.00
6,690.690 LINK
0.0257%
90
Kraken
LINK-GBP$17.65
0.0066344 Eth
$116,435.00
6,597.696 LINK
0.0254%
91
Coinbase Exchange
LINK-ETH$17.71
0.0066596 Eth
$108,061.00
6,100.020 LINK
0.0234%
92
Bitkub
LINK-THB$17.77
0.0066792 Eth
$103,556.00
5,828.516 LINK
0.0224%
93
Bitso
LINK-USD$17.67
0.0066513 Eth
$98,905.00
5,596.642 LINK
0.0215%
94
KuCoin
LINK-USDC$17.71
0.0066588 Eth
$90,188.00
5,092.445 LINK
0.0196%
95
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$17.80
0.0067000 Eth
$79,818.00
81,687.547 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.3139%
96
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$17.71
0.0066572 Eth
$76,530.00
78,307.873 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3009%
97
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$17.84
0.0067101 Eth
$62,645.00
3,612.304 0X5947BB275C521040051D82396192181B413227A3
0.0139%
98
Binance
LINK-BRL$17.88
0.0067363 Eth
$51,980.00
2,865.860 LINK
0.0110%
99
Binance
LINK-BNB$17.68
0.0066587 Eth
$50,635.00
2,834.135 LINK
0.0109%
100
Dex-Trade
LINK-ETH$17.71
0.0066652 Eth
$34,371.00
1,940.750 LINK
0.0075%

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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