ETH Price: $1,870.19 (-0.14%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

745,733 ( 0.008%)

Market

Price

$13.17 @ 0.007042 ETH (+1.71%)

Onchain Market Cap

$13,170,000,000.00

Circulating Supply Market Cap

$8,404,426,288.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x12e5e36d878142d36edfa4a543b39c01b1d9971e
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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 11872.73% |ETH 0.0003846 1730.99%

Market

Volume (24H):$642,050,826.00
Market Capitalization:$8,404,426,288.00
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$13.16
0.0070416 Eth
$76,328,080.00
5,744,855.370 LINK
21.1679%
2
Coinbase Exchange
LINK-USD$13.16
0.0070493 Eth
$40,579,865.00
3,084,045.090 LINK
11.3637%
3
MEXC
LINK-USDT$13.18
0.0070650 Eth
$28,480,521.00
2,161,118.290 LINK
7.9630%
4
Gate.io
LINK-USDT$13.16
0.0070426 Eth
$12,990,376.00
974,284.060 LINK
3.5899%
5
Ourbit
LINK-USDT$13.18
0.0070620 Eth
$12,021,477.00
904,831.290 LINK
3.3340%
6
HTX
LINK-USDT$13.16
0.0070425 Eth
$11,438,227.00
862,332.984 LINK
3.1774%
7
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$13.24
0.0070840 Eth
$10,944,216.00
832,790.640 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.0686%
8
Binance
LINK-USDC$13.16
0.0070482 Eth
$10,542,286.00
794,029.780 LINK
2.9257%
9
OKX
LINK-USDT$13.16
0.0070405 Eth
$10,188,674.00
767,937.756 LINK
2.8296%
10
DigiFinex
LINK-USDT$13.16
0.0070422 Eth
$9,539,518.00
724,841.300 LINK
2.6708%
11
Bybit
LINK-USDT$13.14
0.0070309 Eth
$9,014,741.00
678,604.240 LINK
2.5004%
12
Slex
LINK-USDT$13.15
0.0070403 Eth
$7,813,007.00
589,687.880 LINK
2.1728%
13
MEXC
LINK-EUR$13.19
0.0070678 Eth
$7,653,749.00
580,357.550 LINK
2.1384%
14
XT.COM
LINK-USDT$13.16
0.0070457 Eth
$7,629,517.00
574,278.110 LINK
2.1160%
15
MEXC
LINK-USDC$13.15
0.0070420 Eth
$6,921,019.00
526,313.140 LINK
1.9393%
16
Bitget
LINK-USDT$13.17
0.0070469 Eth
$6,520,589.00
490,698.252 LINK
1.8081%
17
Coinstore
LINK-USDT$13.16
0.0070338 Eth
$6,154,215.00
463,516.140 LINK
1.7079%
18
WhiteBIT
LINK-USDT$13.17
0.0070566 Eth
$6,048,598.00
459,391.010 LINK
1.6927%
19
Hotcoin
LINK-USDT$13.18
0.0070642 Eth
$5,868,436.00
445,274.360 LINK
1.6407%
20
Binance
LINK-FDUSD$13.20
0.0070644 Eth
$5,811,512.00
435,924.020 LINK
1.6062%
21
KuCoin
LINK-USDT$13.16
0.0070445 Eth
$5,379,474.00
408,876.280 LINK
1.5066%
22
CoinW
LINK-USDT$13.16
0.0070549 Eth
$5,263,201.00
399,970.650 LINK
1.4738%
23
Azbit
LINK-USDT$13.15
0.0070494 Eth
$4,514,033.00
339,725.549 LINK
1.2518%
24
Bitunix
LINK-USDT$13.13
0.0070317 Eth
$4,170,238.00
317,353.560 LINK
1.1693%
25
QMall
LINK-USDT$13.16
0.0070442 Eth
$3,057,477.00
229,931.906 LINK
0.8472%
26
Bitvavo
LINK-EUR$13.17
0.0070534 Eth
$3,026,248.00
229,725.552 LINK
0.8465%
27
Kraken
LINK-USD$13.14
0.0070321 Eth
$2,577,967.00
196,163.052 LINK
0.7228%
28
Dex-Trade
LINK-USDT$13.16
0.0070556 Eth
$2,343,694.00
178,077.280 LINK
0.6562%
29
Coinbase Exchange
LINK-EUR$13.16
0.0070479 Eth
$2,260,436.00
171,826.420 LINK
0.6331%
30
BTSE
LINK-USDT$13.18
0.0070595 Eth
$2,201,168.00
167,061.808 LINK
0.6156%
31
Hibt
LINK-USDT$13.15
0.0070431 Eth
$1,828,609.00
137,794.521 LINK
0.5077%
32
AscendEX (BitMax)
LINK-USDT$13.15
0.0070414 Eth
$1,750,654.00
133,121.200 LINK
0.4905%
33
FMCPAY
LINK-USDT$13.16
0.0070410 Eth
$1,720,599.00
130,032.004 LINK
0.4791%
34
Biconomy.com
LINK-USDT$13.19
0.0070637 Eth
$1,428,071.00
107,676.660 LINK
0.3968%
35
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$13.15
0.0070425 Eth
$1,342,131.00
103,027.886 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.3796%
36
FMCPAY
LINK-ETH$13.15
0.0070399 Eth
$1,257,740.00
96,113.600 LINK
0.3541%
37
Binance
LINK-ETH$13.15
0.0070354 Eth
$1,060,048.00
80,798.540 LINK
0.2977%
38
FMCPAY
LINK-BTC$13.15
0.0070344 Eth
$994,778.00
74,776.600 LINK
0.2755%
39
Coinbase Exchange
LINK-GBP$13.17
0.0070578 Eth
$882,420.00
66,983.040 LINK
0.2468%
40
QMall
LINK-USDC$13.18
0.0070589 Eth
$823,081.00
61,978.728 LINK
0.2284%
41
Phemex
LINK-USDT$13.18
0.0070599 Eth
$818,534.00
62,105.000 LINK
0.2288%
42
CoinEx
LINK-USDT$13.17
0.0070499 Eth
$810,749.00
61,293.016 LINK
0.2258%
43
EXMO
LINK-USDT$13.17
0.0070453 Eth
$774,387.00
58,816.029 LINK
0.2167%
44
BitStorage
LINK-USDT$13.17
0.0070513 Eth
$610,052.00
46,321.350 LINK
0.1707%
45
Bybit
LINK-USDC$13.14
0.0070312 Eth
$601,819.00
45,342.163 LINK
0.1671%
46
BigONE
LINK-USDT$13.11
0.0070165 Eth
$600,447.00
45,790.760 LINK
0.1687%
47
tanX
LINK-USDC$13.19
0.0070614 Eth
$495,190.00
37,248.020 LINK
0.1372%
48
EarnBIT
LINK-USDT$13.18
0.0070578 Eth
$483,193.00
36,420.992 LINK
0.1342%
49
Gemini
LINK-USD$13.16
0.0070434 Eth
$476,748.00
36,218.817 LINK
0.1335%
50
Bitbank
LINK-JPY$13.17
0.0070594 Eth
$470,890.00
35,753.539 LINK
0.1317%
51
Binance
LINK-EUR$13.17
0.0070477 Eth
$454,068.00
34,161.950 LINK
0.1259%
52
Binance
LINK-TRY$13.19
0.0070608 Eth
$449,158.00
33,694.570 LINK
0.1242%
53
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.11
0.0070191 Eth
$431,607.00
32,965.669 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1215%
54
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$13.21
0.0070743 Eth
$354,110.00
25,884.703 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0954%
55
BitMart
LINK-BTC$13.14
0.0070331 Eth
$343,834.00
26,159.320 LINK
0.0964%
56
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$13.15
0.0070404 Eth
$335,371.00
25,253.547 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0931%
57
Coinbase Exchange
LINK-USDT$13.19
0.0070686 Eth
$322,738.00
24,463.247 LINK
0.0901%
58
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.15
0.0070358 Eth
$316,688.00
24,160.606 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0890%
59
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.19
0.0070613 Eth
$297,006.00
22,657.949 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0835%
60
XT.COM
LINK-ETH$13.18
0.0070596 Eth
$296,001.00
22,564.100 LINK
0.0831%
61
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$13.11
0.0070190 Eth
$264,288.00
20,221.151 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0745%
62
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$13.14
0.0070350 Eth
$253,428.00
19,344.627 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0713%
63
OKX
LINK-USDC$13.17
0.0070456 Eth
$243,523.00
18,348.227 LINK
0.0676%
64
BitStorage
LINK-ETH$13.15
0.0070344 Eth
$242,318.00
18,432.530 LINK
0.0679%
65
BitDelta
LINK-USDT$13.14
0.0070360 Eth
$235,348.00
17,783.000 LINK
0.0655%
66
WhiteBIT
LINK-TRY$13.23
0.0070887 Eth
$235,142.00
17,773.140 LINK
0.0655%
67
Slex
LINK-ETH$13.18
0.0070569 Eth
$218,107.00
16,656.780 LINK
0.0614%
68
CoinTR
LINK-TRY$13.14
0.0070384 Eth
$172,086.00
12,959.550 LINK
0.0478%
69
Hotcoin
LINK-BTC$13.18
0.0070542 Eth
$170,325.00
12,924.390 LINK
0.0476%
70
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$13.15
0.0070423 Eth
$166,723.00
12,770.427 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0471%
71
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$13.15
0.0070404 Eth
$164,389.00
165,905.077 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.6113%
72
BitMart
LINK-ETH$13.15
0.0070412 Eth
$159,544.00
12,132.120 LINK
0.0447%
73
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$13.14
0.0070301 Eth
$154,535.00
11,625.689 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0428%
74
bitcastle
LINK-USDT$13.14
0.0070350 Eth
$145,737.00
10,969.710 LINK
0.0404%
75
WhiteBIT
LINK-BTC$13.23
0.0070633 Eth
$143,250.00
10,829.100 LINK
0.0399%
76
Bitso
LINK-USD$13.16
0.0070523 Eth
$139,376.00
10,593.209 LINK
0.0390%
77
Bitci TR
LINK-TRY$13.12
0.0070319 Eth
$127,996.00
9,643.300 LINK
0.0355%
78
Kraken
LINK-GBP$13.18
0.0070518 Eth
$123,473.00
9,369.095 LINK
0.0345%
79
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$13.15
0.0070425 Eth
$121,481.00
121,493.438 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4477%
80
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$13.11
0.0070303 Eth
$115,700.00
8,753.102 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0323%
81
Coinbase Exchange
LINK-ETH$13.15
0.0070446 Eth
$105,071.00
7,987.240 LINK
0.0294%
82
Uniswap V4 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$13.14
0.0070374 Eth
$102,105.00
7,820.405 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0288%
83
PointPay
LINK-BTC$13.16
0.0070397 Eth
$101,449.00
7,613.544 LINK
0.0281%
84
WhiteBIT
LINK-EUR$13.13
0.0070328 Eth
$89,395.00
6,810.550 LINK
0.0251%
85
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$13.13
0.0070335 Eth
$82,378.00
6,369.133 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0235%
86
Tokenize
LINK-ETH$13.13
0.0070345 Eth
$76,406.00
5,819.077 LINK
0.0214%
87
Binance
LINK-BNB$13.20
0.0070682 Eth
$76,150.00
5,626.791 LINK
0.0207%
88
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$13.14
0.0070312 Eth
$59,418.00
4,382.801 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0161%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$13.15
0.0070415 Eth
$54,488.00
4,117.913 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0152%
90
Uniswap V4 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$13.14
0.0070378 Eth
$53,401.00
53,841.637 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1984%
91
BTCMarkets
LINK-AUD$13.12
0.0070348 Eth
$51,266.00
3,906.113 LINK
0.0144%
92
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$13.13
0.0070310 Eth
$46,787.00
3,438.296 0X5947BB275C521040051D82396192181B413227A3
0.0127%
93
Coinbase Exchange
LINK-BTC$13.16
0.0070429 Eth
$38,920.00
2,957.030 LINK
0.0109%
94
Hotcoin
LINK-ETH$13.16
0.0070466 Eth
$38,600.00
2,933.640 LINK
0.0108%
95
Bitexen
LINK-TRY$13.03
0.0069823 Eth
$38,270.00
2,935.972 LINK
0.0108%
96
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$13.17
0.0070470 Eth
$33,004.00
2,414.958 0X5947BB275C521040051D82396192181B413227A3
0.0089%
97
Dex-Trade
LINK-ETH$13.13
0.0070391 Eth
$32,232.00
2,454.130 LINK
0.0090%
98
Bittime
LINK-USDT$13.17
0.0070580 Eth
$31,484.00
2,376.570 LINK
0.0088%
99
Bittime
LINK-IDR$13.30
0.0070776 Eth
$30,477.00
2,288.780 LINK
0.0084%
100
Uniswap V4 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$13.12
0.0070299 Eth
$18,880.54
1,444.009 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0053%

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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