ETH Price: $2,617.85 (-3.22%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

733,894 ( 0.007%)

Market

Price

$18.47 @ 0.007055 ETH (-5.58%)

Onchain Market Cap

$18,470,000,000.00

Circulating Supply Market Cap

$11,790,615,044.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0.000000008418842133 LINK

Value
$0.00 ( ~0 Eth) [0.0000%]
0xbE01038906C4CC218F74925e6ECA0F9d4C2aB326
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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 16690.91% |ETH 0.0003846 1734.37%

Market

Volume (24H):$512,410,941.00
Market Capitalization:$11,790,615,044.00
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$18.47
0.0070610 Eth
$63,898,899.00
3,401,984.070 LINK
19.7474%
2
MEXC
LINK-USDT$18.44
0.0070504 Eth
$35,361,416.00
1,917,910.970 LINK
11.1328%
3
Coinbase Exchange
LINK-USD$18.42
0.0070442 Eth
$25,730,494.00
1,396,802.220 LINK
8.1080%
4
Bybit
LINK-USDT$18.48
0.0070653 Eth
$21,671,587.00
1,153,842.046 LINK
6.6977%
5
HTX
LINK-USDT$18.49
0.0070684 Eth
$19,218,238.00
1,021,130.103 LINK
5.9273%
6
WEEX
LINK-USDT$18.47
0.0070612 Eth
$14,442,838.00
766,694.298 LINK
4.4504%
7
P2B
LINK-USDT$18.53
0.0070676 Eth
$13,050,754.00
704,318.370 LINK
4.0883%
8
DigiFinex
LINK-USDT$18.50
0.0070731 Eth
$7,681,969.00
415,208.030 LINK
2.4101%
9
OKX
LINK-USDT$18.48
0.0070637 Eth
$7,215,278.00
382,806.521 LINK
2.2221%
10
XT.COM
LINK-USDT$18.43
0.0070426 Eth
$6,345,515.00
337,698.230 LINK
1.9602%
11
Gate.io
LINK-USDT$18.50
0.0070725 Eth
$6,324,376.00
334,896.060 LINK
1.9440%
12
Coinstore
LINK-USDT$18.38
0.0070266 Eth
$5,674,292.00
302,211.940 LINK
1.7542%
13
WhiteBIT
LINK-USDT$18.61
0.0071148 Eth
$5,369,413.00
288,515.350 LINK
1.6747%
14
Binance
LINK-USDC$18.50
0.0070615 Eth
$5,279,340.00
281,236.720 LINK
1.6325%
15
CoinW
LINK-USDT$18.44
0.0070460 Eth
$4,578,098.00
248,252.130 LINK
1.4410%
16
Bitunix
LINK-USDT$18.48
0.0070670 Eth
$4,391,935.00
237,546.150 LINK
1.3789%
17
Hotcoin
LINK-USDT$18.54
0.0070710 Eth
$4,360,013.00
235,172.340 LINK
1.3651%
18
KuCoin
LINK-USDT$18.47
0.0070619 Eth
$4,281,990.00
231,854.644 LINK
1.3458%
19
BTSE
LINK-USDT$18.39
0.0070335 Eth
$4,172,910.00
226,860.438 LINK
1.3168%
20
Binance
LINK-FDUSD$18.36
0.0070198 Eth
$4,151,433.00
221,672.010 LINK
1.2867%
21
Azbit
LINK-USDT$18.46
0.0070578 Eth
$3,755,942.00
199,959.481 LINK
1.1607%
22
BYDFi
LINK-USDT$18.42
0.0070431 Eth
$3,480,502.00
188,983.480 LINK
1.0970%
23
LATOKEN
LINK-USDT$18.43
0.0070488 Eth
$3,121,869.00
169,386.267 LINK
0.9832%
24
Kraken
LINK-USD$18.42
0.0070433 Eth
$2,665,263.00
144,695.761 LINK
0.8399%
25
QMall
LINK-USDT$18.39
0.0070346 Eth
$2,535,295.00
135,050.964 LINK
0.7839%
26
Coinbase Exchange
LINK-EUR$18.45
0.0070564 Eth
$2,202,871.00
119,379.410 LINK
0.6930%
27
FMCPAY
LINK-USDT$18.41
0.0070423 Eth
$2,189,213.00
116,548.978 LINK
0.6765%
28
Dex-Trade
LINK-USDT$18.46
0.0070603 Eth
$2,068,361.00
112,050.170 LINK
0.6504%
29
Bitvavo
LINK-EUR$18.44
0.0070514 Eth
$1,664,449.00
90,262.887 LINK
0.5239%
30
Coinbase Exchange
LINK-GBP$18.46
0.0070577 Eth
$1,595,894.00
86,469.900 LINK
0.5019%
31
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$18.39
0.0070297 Eth
$1,483,062.00
79,520.607 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4616%
32
Biconomy.com
LINK-USDT$18.44
0.0070515 Eth
$1,415,646.00
75,136.390 LINK
0.4361%
33
FMCPAY
LINK-ETH$18.39
0.0070297 Eth
$1,231,328.00
65,912.800 LINK
0.3826%
34
Binance
LINK-BTC$18.41
0.0070380 Eth
$1,231,227.00
65,555.540 LINK
0.3805%
35
CoinEx
LINK-USDT$18.45
0.0070568 Eth
$1,165,281.00
61,565.492 LINK
0.3574%
36
PointPay
LINK-USDT$18.43
0.0070496 Eth
$1,046,605.00
55,775.076 LINK
0.3238%
37
FMCPAY
LINK-BTC$18.39
0.0070334 Eth
$1,036,535.00
55,266.500 LINK
0.3208%
38
Trubit
LINK-USDT$18.39
0.0070323 Eth
$856,180.00
45,521.810 LINK
0.2642%
39
Binance
LINK-ETH$18.40
0.0070361 Eth
$769,964.00
41,381.990 LINK
0.2402%
40
tanX
LINK-USDC$18.43
0.0070478 Eth
$767,303.00
40,809.020 LINK
0.2369%
41
Phemex
LINK-USDT$18.56
0.0070787 Eth
$647,985.00
34,913.160 LINK
0.2027%
42
EXMO
LINK-USDT$18.51
0.0070765 Eth
$643,137.00
34,747.900 LINK
0.2017%
43
Bitbank
LINK-JPY$18.49
0.0070710 Eth
$630,259.00
34,084.526 LINK
0.1978%
44
BigONE
LINK-USDT$18.53
0.0070730 Eth
$568,436.00
30,672.040 LINK
0.1780%
45
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$18.40
0.0070362 Eth
$530,721.00
57,041.216 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3311%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.44
0.0070513 Eth
$492,133.00
26,402.867 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1533%
47
Bitstamp
LINK-USD$18.46
0.0070572 Eth
$484,394.00
26,240.220 LINK
0.1523%
48
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.43
0.0070473 Eth
$463,427.00
24,766.600 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1438%
49
HashKey Exchange
LINK-USD$18.52
0.0070809 Eth
$453,374.00
24,067.280 LINK
0.1397%
50
QMall
LINK-USDC$18.47
0.0070624 Eth
$434,608.00
23,153.000 LINK
0.1344%
51
Binance
LINK-TRY$18.55
0.0070733 Eth
$380,385.00
20,185.700 LINK
0.1172%
52
WhiteBIT
LINK-BTC$18.43
0.0070487 Eth
$378,510.00
20,534.640 LINK
0.1192%
53
Gemini
LINK-USD$18.48
0.0070653 Eth
$371,321.00
20,091.797 LINK
0.1166%
54
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.43
0.0070471 Eth
$342,906.00
18,289.368 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1062%
55
WEEX
LINK-USDC$18.53
0.0070684 Eth
$328,482.00
17,452.300 LINK
0.1013%
56
Bybit
LINK-USDC$18.43
0.0070478 Eth
$325,954.00
17,428.408 LINK
0.1012%
57
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.45
0.0070533 Eth
$318,109.00
16,992.457 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0986%
58
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.52
0.0070815 Eth
$305,555.00
16,250.086 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0943%
59
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.43
0.0070473 Eth
$298,496.00
304,495.071 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7675%
60
Binance
LINK-EUR$18.47
0.0070687 Eth
$254,203.00
13,486.170 LINK
0.0783%
61
BitMart
LINK-BTC$18.46
0.0070557 Eth
$248,026.00
13,438.720 LINK
0.0780%
62
BitDelta
LINK-USDT$18.45
0.0070564 Eth
$236,350.00
12,557.000 LINK
0.0729%
63
OKX
LINK-USDC$18.48
0.0070633 Eth
$220,524.00
11,746.161 LINK
0.0682%
64
Slex
LINK-ETH$18.41
0.0070396 Eth
$203,586.00
10,895.670 LINK
0.0632%
65
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.42
0.0070445 Eth
$200,390.00
10,691.426 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0621%
66
Bitci TR
LINK-TRY$18.37
0.0070226 Eth
$193,842.00
10,290.430 LINK
0.0597%
67
BitStorage
LINK-ETH$18.39
0.0070333 Eth
$162,550.00
8,837.220 LINK
0.0513%
68
Hotcoin
LINK-BTC$18.54
0.0070694 Eth
$151,964.00
8,198.300 LINK
0.0476%
69
LATOKEN
LINK-BTC$18.41
0.0070396 Eth
$149,716.00
8,133.318 LINK
0.0472%
70
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$18.46
0.0070570 Eth
$147,238.00
7,839.089 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0455%
71
BYDFi
LINK-USDC$18.43
0.0070490 Eth
$139,005.00
7,541.890 LINK
0.0438%
72
bitcastle
LINK-USDT$18.47
0.0070615 Eth
$138,350.00
7,368.410 LINK
0.0428%
73
Bitkub
LINK-THB$18.47
0.0070568 Eth
$135,830.00
7,354.258 LINK
0.0427%
74
WhiteBIT
LINK-EUR$18.47
0.0070618 Eth
$127,888.00
6,925.230 LINK
0.0402%
75
CoinTR
LINK-TRY$18.52
0.0070679 Eth
$114,502.00
6,081.720 LINK
0.0353%
76
KuCoin
LINK-USDC$18.41
0.0070384 Eth
$113,697.00
6,176.836 LINK
0.0359%
77
WhiteBIT
LINK-TRY$18.49
0.0070699 Eth
$104,158.00
5,633.780 LINK
0.0327%
78
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$18.42
0.0070412 Eth
$92,692.00
4,946.356 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0287%
79
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.52
0.0070811 Eth
$88,451.00
89,741.243 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.5209%
80
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$18.39
0.0070297 Eth
$86,981.00
88,847.265 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5157%
81
Coinbase Exchange
LINK-ETH$18.45
0.0070576 Eth
$76,947.00
4,170.060 LINK
0.0242%
82
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$18.41
0.0070396 Eth
$75,674.00
4,057.645 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0236%
83
BitMart
LINK-ETH$18.43
0.0070452 Eth
$69,452.00
3,768.740 LINK
0.0219%
84
Binance
LINK-BNB$18.39
0.0070275 Eth
$64,589.00
3,374.897 LINK
0.0196%
85
KuCoin
LINK-BTC$18.40
0.0070374 Eth
$62,837.00
3,414.283 LINK
0.0198%
86
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$18.44
0.0070528 Eth
$49,672.00
2,650.483 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0154%
87
Bitso
LINK-USD$18.50
0.0070671 Eth
$47,918.00
2,590.173 LINK
0.0150%
88
Hotcoin
LINK-ETH$18.41
0.0070363 Eth
$42,645.00
2,316.820 LINK
0.0134%
89
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$18.42
0.0070456 Eth
$40,013.00
2,130.443 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0124%
90
Foxbit
LINK-BRL$18.56
0.0070965 Eth
$37,236.00
1,966.866 LINK
0.0114%
91
Mercado Bitcoin
LINK-BRL$18.53
0.0070843 Eth
$34,471.00
1,860.590 LINK
0.0108%
92
Binance
LINK-BRL$18.57
0.0071016 Eth
$31,743.00
1,676.230 LINK
0.0097%
93
Bitstamp
LINK-GBP$18.47
0.0070605 Eth
$31,406.00
1,700.501 LINK
0.0099%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$18.44
0.0070498 Eth
$25,292.00
1,357.455 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0079%
95
Dex-Trade
LINK-ETH$18.68
0.0070966 Eth
$23,753.00
1,271.570 LINK
0.0074%
96
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$18.32
0.0070067 Eth
$22,427.00
1,217.585 0X5947BB275C521040051D82396192181B413227A3
0.0071%
97
Uniswap V4 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$18.45
0.0070547 Eth
$19,702.48
1,041.653 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0060%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$18.46
0.0070518 Eth
$15,631.43
830.098 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0048%
99
Bitexen
LINK-TRY$18.31
0.0069952 Eth
$14,872.16
812.349 LINK
0.0047%
100
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$18.42
0.0070420 Eth
$14,610.01
14,941.491 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0867%

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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