ETH Price: $2,619.04 (-0.23%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

720,995 ( 0.013%)

Market

Price

$12.09 @ 0.004616 ETH (-0.42%)

Onchain Market Cap

$12,090,000,000.00

Circulating Supply Market Cap

$7,584,168,549.00

Other Info

Token Contract (WITH 18 Decimals)

Filtered by Token Holder
linkparadigm.eth
Balance
0 LINK

Value
$0.00
0xC2EdF07f6823506a386e82aa595a2B5EBB9BDCE6
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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 10890.91% |ETH 0.0003846 1100.21%

Market

Volume (24H):$348,141,420.00
Market Capitalization:$7,584,168,549.00
Circulating Supply:626,849,971.00 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
LBank
LINK-USDT$12.08
0.0046100 Eth
$36,349,120.00
3,009,113.920 LINK
18.4926%
2
Binance
LINK-USDT$12.09
0.0046093 Eth
$20,555,699.00
1,707,932.340 LINK
10.4962%
3
Bybit
LINK-USDT$12.07
0.0046069 Eth
$14,611,265.00
1,212,303.084 LINK
7.4503%
4
Coinbase Exchange
LINK-USD$12.05
0.0045998 Eth
$14,462,806.00
1,199,934.130 LINK
7.3742%
5
HTX
LINK-USDT$12.07
0.0046070 Eth
$13,344,928.00
1,107,424.197 LINK
6.8057%
6
WhiteBIT
LINK-USDT$12.06
0.0046027 Eth
$12,607,150.00
1,045,693.780 LINK
6.4264%
7
Bitget
LINK-USDT$12.06
0.0046055 Eth
$9,586,274.00
794,467.001 LINK
4.8824%
8
Websea
LINK-USDT$12.08
0.0046120 Eth
$8,911,059.00
0.000 LINK
0.0000%
9
WEEX
LINK-USDT$12.07
0.0046067 Eth
$5,093,736.00
423,232.520 LINK
2.6010%
10
Azbit
LINK-USDT$12.09
0.0046116 Eth
$5,012,680.00
415,917.900 LINK
2.5560%
11
Biconomy.com
LINK-USDT$12.07
0.0046049 Eth
$4,934,175.00
409,324.750 LINK
2.5155%
12
P2B
LINK-USDT$12.08
0.0046099 Eth
$4,240,476.00
351,020.610 LINK
2.1572%
13
BVOX
LINK-USDT$12.06
0.0046051 Eth
$3,641,898.00
302,192.400 LINK
1.8571%
14
Slex
LINK-USDT$12.10
0.0046141 Eth
$3,518,282.00
292,146.420 LINK
1.7954%
15
OKX
LINK-USDT$12.06
0.0046027 Eth
$2,959,534.00
246,089.943 LINK
1.5124%
16
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.07
0.0046064 Eth
$2,690,611.00
223,274.866 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.3721%
17
DigiFinex
LINK-USDT$12.07
0.0046073 Eth
$2,632,858.00
218,136.200 LINK
1.3406%
18
KuCoin
LINK-USDT$12.06
0.0046036 Eth
$2,326,610.00
192,920.041 LINK
1.1856%
19
Deepcoin
LINK-USDT$12.07
0.0046070 Eth
$2,151,123.00
186,938.220 LINK
1.1488%
20
Crypto.com Exchange
LINK-USDT$12.05
0.0046017 Eth
$2,076,458.00
172,249.100 LINK
1.0586%
21
XT.COM
LINK-USDT$12.07
0.0046068 Eth
$1,921,933.00
159,808.860 LINK
0.9821%
22
Upbit
LINK-KRW$12.08
0.0046115 Eth
$1,810,914.00
149,903.039 LINK
0.9212%
23
Trubit
LINK-USDT$12.09
0.0046140 Eth
$1,800,482.00
149,294.360 LINK
0.9175%
24
AscendEX (BitMax)
LINK-USDT$12.08
0.0046111 Eth
$1,721,634.00
142,523.000 LINK
0.8759%
25
Gate.io
LINK-USDT$12.06
0.0046022 Eth
$1,573,835.00
131,092.530 LINK
0.8056%
26
CoinW
LINK-USDT$12.08
0.0046102 Eth
$1,536,937.00
127,230.250 LINK
0.7819%
27
C-Patex
LINK-USDT$12.07
0.0046061 Eth
$1,496,173.00
123,963.459 LINK
0.7618%
28
Kraken
LINK-USD$12.05
0.0046014 Eth
$1,486,550.00
123,322.128 LINK
0.7579%
29
WhiteBIT
LINK-BTC$12.06
0.0046024 Eth
$1,417,658.00
117,596.070 LINK
0.7227%
30
HashKey Global
LINK-USDT$12.08
0.0046102 Eth
$1,355,058.00
112,171.008 LINK
0.6894%
31
BYDFi
LINK-USDT$12.09
0.0046076 Eth
$1,001,914.00
82,875.760 LINK
0.5093%
32
Bitexen
LINK-TRY$12.08
0.0046066 Eth
$993,195.00
82,214.520 LINK
0.5053%
33
Bitexen
LINK-USDT$12.08
0.0046055 Eth
$964,388.00
79,849.370 LINK
0.4907%
34
Azbit
LINK-ETH$12.10
0.0046141 Eth
$941,260.00
78,027.829 LINK
0.4795%
35
FMCPAY
LINK-USDT$12.07
0.0046027 Eth
$925,362.00
76,878.022 LINK
0.4725%
36
Bitvavo
LINK-EUR$12.07
0.0046074 Eth
$742,447.00
61,497.358 LINK
0.3779%
37
Dex-Trade
LINK-USDT$12.07
0.0046068 Eth
$696,444.00
57,690.710 LINK
0.3545%
38
Bithumb
LINK-KRW$12.10
0.0046162 Eth
$626,597.00
51,803.207 LINK
0.3184%
39
CoinEx
LINK-USDT$12.08
0.0046093 Eth
$564,259.00
46,618.406 LINK
0.2865%
40
FMCPAY
LINK-BTC$12.08
0.0046064 Eth
$551,540.00
45,815.700 LINK
0.2816%
41
tanX
LINK-USDC$12.14
0.0046175 Eth
$522,011.00
43,338.820 LINK
0.2663%
42
BigONE
LINK-USDT$12.08
0.0046113 Eth
$507,266.00
41,981.720 LINK
0.2580%
43
FMCPAY
LINK-ETH$12.08
0.0046073 Eth
$498,447.00
41,284.480 LINK
0.2537%
44
Bybit
LINK-USDC$12.08
0.0046125 Eth
$490,737.00
40,737.965 LINK
0.2504%
45
Bybit
LINK-EUR$12.10
0.0046192 Eth
$464,989.00
37,978.110 LINK
0.2334%
46
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.09
0.0046130 Eth
$422,753.00
35,238.130 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2166%
47
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.02
0.0045883 Eth
$419,635.00
34,972.121 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2149%
48
WhiteBIT
LINK-EUR$12.02
0.0045901 Eth
$401,768.00
33,416.010 LINK
0.2054%
49
PointPay
LINK-USDT$12.08
0.0046100 Eth
$344,128.00
28,593.231 LINK
0.1757%
50
Gemini
LINK-USD$12.08
0.0046116 Eth
$304,329.00
25,184.277 LINK
0.1548%
51
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.07
0.0046073 Eth
$282,063.00
23,402.388 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1438%
52
EXMO
LINK-USDT$12.08
0.0046116 Eth
$273,409.00
22,625.928 LINK
0.1390%
53
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.09
0.0046139 Eth
$263,893.00
21,904.201 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1346%
54
Phemex
LINK-USDT$12.09
0.0046101 Eth
$235,179.00
19,453.360 LINK
0.1196%
55
BitMart
LINK-BTC$12.09
0.0046093 Eth
$184,777.00
15,288.200 LINK
0.0940%
56
LATOKEN
LINK-BTC$12.09
0.0046133 Eth
$151,785.00
12,556.303 LINK
0.0772%
57
BitDelta
LINK-USDT$12.06
0.0046029 Eth
$140,928.00
11,709.000 LINK
0.0720%
58
Binance
LINK-TRY$12.09
0.0046100 Eth
$131,579.00
10,900.870 LINK
0.0670%
59
Bitbank
LINK-JPY$12.13
0.0046309 Eth
$125,919.00
10,376.929 LINK
0.0638%
60
BYDFi
LINK-USDC$12.08
0.0046109 Eth
$117,468.00
9,720.590 LINK
0.0597%
61
Bitci TR
LINK-TRY$12.16
0.0046409 Eth
$117,177.00
9,702.540 LINK
0.0596%
62
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.07
0.0046077 Eth
$109,998.00
9,113.228 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0560%
63
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.08
0.0046087 Eth
$76,037.00
6,350.239 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0390%
64
Slex
LINK-BTC$12.10
0.0046153 Eth
$70,817.00
5,873.300 LINK
0.0361%
65
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.07
0.0046059 Eth
$66,552.00
66,303.311 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4075%
66
WhiteBIT
LINK-TRY$12.08
0.0046108 Eth
$64,800.00
5,365.330 LINK
0.0330%
67
Slex
LINK-ETH$12.08
0.0046115 Eth
$62,944.00
5,220.820 LINK
0.0321%
68
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.02
0.0045893 Eth
$61,829.00
61,570.280 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.3784%
69
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.07
0.0046089 Eth
$58,625.00
4,854.129 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0298%
70
GMO Japan
LINK-JPY$12.18
0.0046496 Eth
$42,775.00
3,510.700 LINK
0.0216%
71
OKX
LINK-USDC$12.10
0.0046183 Eth
$42,395.00
3,539.385 LINK
0.0218%
72
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.07
0.0046059 Eth
$39,329.00
3,275.789 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0201%
73
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.09
0.0046139 Eth
$27,316.00
27,162.906 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.1669%
74
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$12.04
0.0045962 Eth
$26,661.00
2,234.078 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0137%
75
Bitso
LINK-USD$12.11
0.0046221 Eth
$23,857.00
1,969.722 LINK
0.0121%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.07
0.0046076 Eth
$23,348.00
1,938.842 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0119%
77
EXMO
LINK-BTC$12.08
0.0046085 Eth
$20,177.00
1,670.899 LINK
0.0103%
78
Mercado Bitcoin
LINK-BRL$12.15
0.0046388 Eth
$20,076.00
1,652.118 LINK
0.0102%
79
Binance US
LINK-USDT$12.08
0.0046113 Eth
$19,853.22
1,643.471 LINK
0.0101%
80
BTCMarkets
LINK-AUD$12.15
0.0046378 Eth
$18,486.26
1,521.188 LINK
0.0093%
81
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.07
0.0046079 Eth
$18,182.83
1,515.662 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0093%
82
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$12.15
0.0046386 Eth
$15,029.25
1,238.788 0X5947BB275C521040051D82396192181B413227A3
0.0076%
83
KuCoin
LINK-KCS$12.09
0.0046153 Eth
$12,674.03
1,048.256 LINK
0.0064%
84
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$12.10
0.0046186 Eth
$12,161.98
1,012.146 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0062%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.04
0.0045932 Eth
$10,937.79
913.404 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0056%
86
Coinone
LINK-KRW$12.13
0.0046306 Eth
$8,864.40
730.567 LINK
0.0045%
87
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$12.14
0.0046331 Eth
$8,609.44
13.632 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
88
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$12.02
0.0045883 Eth
$6,495.47
6,451.881 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0397%
89
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$12.08
0.0046099 Eth
$5,773.30
472.031 0X5947BB275C521040051D82396192181B413227A3
0.0029%
90
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.13
0.0046214 Eth
$5,760.27
503.038 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0031%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$12.10
0.0046157 Eth
$5,713.92
474.691 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0029%
92
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.05
0.0045999 Eth
$4,964.35
414.113 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0025%
93
CoinEx
LINK-USDC$12.11
0.0046222 Eth
$4,509.29
374.680 LINK
0.0023%
94
CoinEx
LINK-BTC$12.03
0.0045913 Eth
$2,190.00
182.303 LINK
0.0011%
95
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$12.10
0.0046171 Eth
$1,990.43
165.605 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0010%
96
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.10
0.0046162 Eth
$1,584.91
131.974 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0008%
97
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$12.09
0.0046121 Eth
$1,577.29
131.148 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0008%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$12.17
0.0046363 Eth
$649.13
52.908 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0003%
99
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.09
0.0046041 Eth
$484.68
479.145 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0029%
100
Solidly V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$12.11
0.0046198 Eth
$274.88
22.839 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0001%

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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