ETH Price: $3,351.16 (-1.97%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

728,410 ( 0.012%)

Market

Price

$21.30 @ 0.006356 ETH (-9.30%)

Onchain Market Cap

$21,300,000,000.00

Circulating Supply Market Cap

$13,445,931,877.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x190ced5672f19a81848b15f33ebb67ecc9e66ffd
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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 19263.64% |ETH 0.0003846 1552.63%

Market

Volume (24H):$955,200,152.00
Market Capitalization:$13,445,931,877.00
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
Binance
LINK-USDT$21.34
0.0063722 Eth
$103,470,758.00
4,689,288.950 LINK
20.3972%
2
Coinbase Exchange
LINK-USD$21.31
0.0063644 Eth
$43,095,555.00
2,022,695.730 LINK
8.7982%
3
Bybit
LINK-USDT$21.30
0.0063598 Eth
$31,001,998.00
1,414,541.954 LINK
6.1529%
4
WhiteBIT
LINK-USDT$21.30
0.0063633 Eth
$29,203,026.00
1,370,743.440 LINK
5.9624%
5
Slex
LINK-USDT$21.29
0.0063612 Eth
$21,759,915.00
986,908.460 LINK
4.2928%
6
MEXC
LINK-USDT$21.32
0.0063664 Eth
$21,422,450.00
1,004,941.630 LINK
4.3712%
7
OKX
LINK-USDT$21.34
0.0063731 Eth
$20,728,643.00
937,758.371 LINK
4.0790%
8
P2B
LINK-USDT$21.32
0.0063664 Eth
$20,719,807.00
971,980.200 LINK
4.2279%
9
CoinW
LINK-USDT$21.28
0.0063638 Eth
$18,292,773.00
859,765.150 LINK
3.7398%
10
DigiFinex
LINK-USDT$21.32
0.0063669 Eth
$13,421,994.00
629,564.310 LINK
2.7384%
11
HTX
LINK-USDT$21.32
0.0063659 Eth
$10,509,894.00
477,125.733 LINK
2.0754%
12
FameEX
LINK-USDT$21.32
0.0063677 Eth
$10,335,085.00
468,367.200 LINK
2.0373%
13
Azbit
LINK-USDT$21.28
0.0063573 Eth
$10,310,936.00
467,307.415 LINK
2.0327%
14
XT.COM
LINK-USDT$21.31
0.0063663 Eth
$10,302,136.00
466,841.460 LINK
2.0306%
15
Coinstore
LINK-USDT$21.31
0.0063648 Eth
$9,325,477.00
423,144.360 LINK
1.8406%
16
Bitunix
LINK-USDT$21.30
0.0063631 Eth
$8,366,645.00
392,724.830 LINK
1.7083%
17
Biconomy.com
LINK-USDT$21.30
0.0063630 Eth
$7,050,631.00
319,892.192 LINK
1.3914%
18
BYDFi
LINK-USDT$21.30
0.0063628 Eth
$6,547,566.00
307,418.230 LINK
1.3372%
19
BTSE
LINK-USDT$21.30
0.0063628 Eth
$6,225,163.00
292,281.290 LINK
1.2713%
20
Binance
LINK-FDUSD$21.32
0.0063684 Eth
$5,709,953.00
258,542.290 LINK
1.1246%
21
LATOKEN
LINK-USDT$21.32
0.0063713 Eth
$4,961,283.00
232,745.960 LINK
1.0124%
22
LBank
LINK-USDT$21.28
0.0063649 Eth
$4,591,221.00
215,752.800 LINK
0.9385%
23
QMall
LINK-USDT$21.32
0.0063682 Eth
$4,187,508.00
190,114.696 LINK
0.8269%
24
Hotcoin
LINK-USDT$21.30
0.0063646 Eth
$4,118,346.00
193,312.460 LINK
0.8409%
25
Binance
LINK-USDC$21.31
0.0063704 Eth
$4,074,978.00
184,550.950 LINK
0.8027%
26
KuCoin
LINK-USDT$21.32
0.0063677 Eth
$4,047,223.00
189,820.630 LINK
0.8257%
27
Kraken
LINK-USD$21.31
0.0063654 Eth
$3,716,457.00
174,370.705 LINK
0.7585%
28
Dex-Trade
LINK-USDT$21.30
0.0063642 Eth
$3,367,935.00
158,089.903 LINK
0.6876%
29
Bitvavo
LINK-EUR$21.30
0.0063726 Eth
$3,365,157.00
157,963.729 LINK
0.6871%
30
CoinEx
LINK-USDT$21.33
0.0063742 Eth
$2,301,142.00
104,735.560 LINK
0.4556%
31
Dcoin
LINK-USDT$21.31
0.0063676 Eth
$2,160,288.00
101,355.000 LINK
0.4409%
32
Bybit
LINK-USDC$21.31
0.0063640 Eth
$2,100,847.00
97,687.035 LINK
0.4249%
33
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.39
0.0063873 Eth
$2,066,570.00
93,193.990 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.4054%
34
PointPay
LINK-USDT$21.30
0.0063633 Eth
$1,608,742.00
73,212.027 LINK
0.3185%
35
Coinbase Exchange
LINK-GBP$21.32
0.0063687 Eth
$1,578,889.00
74,055.300 LINK
0.3221%
36
EXMO
LINK-USDT$21.31
0.0063655 Eth
$1,538,268.00
72,179.154 LINK
0.3140%
37
Coinbase Exchange
LINK-ETH$21.29
0.0063577 Eth
$1,536,633.00
72,190.590 LINK
0.3140%
38
Coinbase Exchange
LINK-EUR$21.34
0.0063732 Eth
$1,341,849.00
62,892.260 LINK
0.2736%
39
Phemex
LINK-USDT$21.33
0.0063795 Eth
$1,232,191.00
57,754.760 LINK
0.2512%
40
WhiteBIT
LINK-BTC$21.29
0.0063663 Eth
$1,172,839.00
55,092.630 LINK
0.2396%
41
Kraken
LINK-USDT$21.32
0.0063687 Eth
$1,146,555.00
53,766.620 LINK
0.2339%
42
Coinbase Exchange
LINK-USDT$21.23
0.0063403 Eth
$1,046,761.00
49,309.827 LINK
0.2145%
43
tanX
LINK-USDC$21.34
0.0063778 Eth
$1,027,723.00
46,777.760 LINK
0.2035%
44
EarnBIT
LINK-USDT$21.32
0.0063697 Eth
$962,239.00
43,528.948 LINK
0.1893%
45
WhiteBIT
LINK-TRY$21.45
0.0064060 Eth
$948,771.00
44,235.450 LINK
0.1924%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.33
0.0063697 Eth
$844,693.00
38,107.558 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1658%
47
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$21.21
0.0063354 Eth
$770,896.00
34,548.815 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1503%
48
Gemini
LINK-USD$21.33
0.0063701 Eth
$741,905.00
34,781.911 LINK
0.1513%
49
Bitbank
LINK-JPY$21.41
0.0063951 Eth
$739,653.00
34,542.236 LINK
0.1502%
50
Binance
LINK-TRY$21.44
0.0064029 Eth
$723,804.00
32,695.120 LINK
0.1422%
51
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.36
0.0063799 Eth
$678,853.00
52,496.830 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.2283%
52
BigONE
LINK-USDT$21.28
0.0063557 Eth
$628,705.00
29,544.600 LINK
0.1285%
53
itBit
LINK-USD$21.34
0.0063753 Eth
$546,834.00
25,624.853 LINK
0.1115%
54
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.33
0.0063693 Eth
$545,707.00
24,787.031 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1078%
55
Binance
LINK-EUR$21.31
0.0063739 Eth
$536,280.00
24,027.070 LINK
0.1045%
56
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.23
0.0063404 Eth
$530,169.00
23,609.574 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.1027%
57
GMO Japan
LINK-JPY$21.37
0.0063832 Eth
$495,504.00
23,185.000 LINK
0.1008%
58
HashKey Exchange
LINK-USD$21.29
0.0063691 Eth
$407,942.00
17,991.447 LINK
0.0783%
59
WhiteBIT
LINK-EUR$21.30
0.0063710 Eth
$406,021.00
19,060.880 LINK
0.0829%
60
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.34
0.0063729 Eth
$385,504.00
17,213.608 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0749%
61
Slex
LINK-ETH$21.31
0.0063658 Eth
$384,048.00
17,439.490 LINK
0.0759%
62
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.34
0.0063736 Eth
$376,968.00
402,484.009 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.7507%
63
BitMart
LINK-BTC$21.29
0.0063605 Eth
$361,251.00
16,964.140 LINK
0.0738%
64
QMall
LINK-USDC$21.32
0.0063729 Eth
$344,512.00
15,624.861 LINK
0.0680%
65
OKX
LINK-USDC$21.32
0.0063675 Eth
$298,116.00
13,659.809 LINK
0.0594%
66
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$21.39
0.0063872 Eth
$289,984.00
12,970.377 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0564%
67
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$21.33
0.0063697 Eth
$286,270.00
300,237.611 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.3060%
68
Coinbase Exchange
LINK-BTC$21.32
0.0063691 Eth
$234,724.00
11,010.130 LINK
0.0479%
69
Bitci TR
LINK-TRY$21.34
0.0063759 Eth
$227,440.00
10,257.250 LINK
0.0446%
70
BitStorage
LINK-ETH$21.30
0.0063648 Eth
$203,621.00
9,557.460 LINK
0.0416%
71
LATOKEN
LINK-BTC$21.31
0.0063640 Eth
$203,327.00
9,542.421 LINK
0.0415%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$21.29
0.0063586 Eth
$155,711.00
7,041.939 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0306%
73
Bitso
LINK-USD$21.16
0.0063226 Eth
$154,065.00
7,279.723 LINK
0.0317%
74
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.31
0.0063645 Eth
$152,110.00
6,829.265 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0297%
75
BitMart
LINK-ETH$21.30
0.0063612 Eth
$150,745.00
7,078.020 LINK
0.0308%
76
PointPay
LINK-BTC$21.31
0.0063647 Eth
$145,728.00
6,669.008 LINK
0.0290%
77
Hotcoin
LINK-BTC$21.30
0.0063645 Eth
$139,506.00
6,548.420 LINK
0.0285%
78
Bitkub
LINK-THB$21.41
0.0064070 Eth
$139,291.00
6,506.238 LINK
0.0283%
79
Kraken
LINK-GBP$21.36
0.0063787 Eth
$125,034.00
5,854.160 LINK
0.0255%
80
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$21.36
0.0063799 Eth
$116,016.00
5,172.381 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0225%
81
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$21.44
0.0064030 Eth
$106,513.00
4,833.505 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0210%
82
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$21.23
0.0063399 Eth
$101,373.00
4,598.964 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0200%
83
KuCoin
LINK-USDC$21.32
0.0063674 Eth
$94,184.00
4,417.537 LINK
0.0192%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$21.33
0.0063697 Eth
$83,071.00
3,725.208 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0162%
85
Binance US
LINK-USDT$21.29
0.0063596 Eth
$77,240.00
3,627.465 LINK
0.0158%
86
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$21.39
0.0063873 Eth
$72,401.00
76,165.093 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3313%
87
KuCoin
LINK-BTC$21.33
0.0063696 Eth
$56,788.00
2,662.620 LINK
0.0116%
88
PancakeSwap (v2)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$21.21
0.0063345 Eth
$55,054.00
2,466.106 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0107%
89
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$21.38
0.0063860 Eth
$54,775.00
2,480.193 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0108%
90
Hotcoin
LINK-ETH$21.29
0.0063598 Eth
$48,694.00
2,287.350 LINK
0.0099%
91
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$21.35
0.0063775 Eth
$37,118.00
2,845.711 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.0124%
92
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$21.36
0.0063799 Eth
$31,116.00
1,398.895 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0061%
93
Gemini
LINK-BTC$21.23
0.0063415 Eth
$30,627.00
1,442.312 LINK
0.0063%
94
Uniswap V3 (Avalanche)
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$21.19
0.0063301 Eth
$30,327.00
1,382.344 0X5947BB275C521040051D82396192181B413227A3
0.0060%
95
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$21.27
0.0063536 Eth
$26,543.00
1,207.538 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0053%
96
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$21.35
0.0063784 Eth
$23,983.00
32.956 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$21.31
0.0063654 Eth
$23,459.00
1,052.184 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0046%
98
zondacrypto
LINK-USDC$21.37
0.0063882 Eth
$18,501.46
865.759 LINK
0.0038%
99
Bitexen
LINK-TRY$21.20
0.0063452 Eth
$15,826.47
746.499 LINK
0.0032%
100
Ace
LINK-USDT$21.30
0.0063606 Eth
$4,048.61
183.580 LINK
0.0008%

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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