ETH Price: $2,606.25 (-2.20%)

Token

ChainLink Token (LINK)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

721,177 ( -0.049%)

Market

Price

$11.98 @ 0.004597 ETH (-4.73%)

Onchain Market Cap

$11,980,000,000.00

Circulating Supply Market Cap

$7,511,891,970.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0x10257a31698b5b7fd62bb685c3ab48d196201e1f
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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 10790.91% |ETH 0.0003846 1095.27%

Market

Volume (24H):$387,216,942.00
Market Capitalization:$7,511,891,970.00
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$11.99
0.0045972 Eth
$35,724,942.00
2,979,796.950 LINK
18.3248%
2
Binance
LINK-USDT$11.96
0.0045924 Eth
$24,751,571.00
2,018,087.140 LINK
12.4106%
3
WhiteBIT
LINK-USDT$12.00
0.0046068 Eth
$17,107,428.00
1,426,099.840 LINK
8.7701%
4
Coinbase Exchange
LINK-USD$11.98
0.0045953 Eth
$15,146,327.00
1,263,879.080 LINK
7.7724%
5
Bybit
LINK-USDT$11.99
0.0046036 Eth
$14,362,782.00
1,168,248.612 LINK
7.1844%
6
HTX
LINK-USDT$11.99
0.0046052 Eth
$11,997,091.00
976,331.889 LINK
6.0041%
7
Bitget
LINK-USDT$11.99
0.0046058 Eth
$8,933,110.00
724,787.628 LINK
4.4572%
8
Biconomy.com
LINK-USDT$11.98
0.0045998 Eth
$4,874,847.00
395,475.063 LINK
2.4320%
9
P2B
LINK-USDT$11.98
0.0045983 Eth
$4,866,160.00
406,214.990 LINK
2.4981%
10
Azbit
LINK-USDT$11.98
0.0045995 Eth
$4,273,694.00
344,854.900 LINK
2.1207%
11
Slex
LINK-USDT$12.01
0.0046065 Eth
$4,207,503.00
342,510.220 LINK
2.1063%
12
OKX
LINK-USDT$11.98
0.0046005 Eth
$3,796,707.00
309,352.671 LINK
1.9024%
13
Upbit
LINK-KRW$12.02
0.0046175 Eth
$3,306,707.00
275,046.042 LINK
1.6914%
14
Trubit
LINK-USDT$12.01
0.0046081 Eth
$3,148,096.00
256,276.010 LINK
1.5760%
15
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.94
0.0045811 Eth
$2,751,724.00
226,570.552 0X514910771AF9CA656AF840DFF83E8264ECF986CA
1.3933%
16
ProBit Global
LINK-USDT$11.96
0.0045944 Eth
$2,340,829.00
195,679.193 LINK
1.2034%
17
XT.COM
LINK-USDT$11.97
0.0045978 Eth
$2,337,499.00
190,375.800 LINK
1.1707%
18
KuCoin
LINK-USDT$11.98
0.0045996 Eth
$2,170,311.00
181,206.645 LINK
1.1144%
19
Coinstore
LINK-USDT$11.97
0.0045974 Eth
$1,904,957.00
155,041.170 LINK
0.9535%
20
CoinW
LINK-USDT$12.01
0.0046046 Eth
$1,833,274.00
152,703.250 LINK
0.9391%
21
AscendEX (BitMax)
LINK-USDT$11.98
0.0046021 Eth
$1,747,417.00
145,827.300 LINK
0.8968%
22
WhiteBIT
LINK-BTC$11.98
0.0046014 Eth
$1,709,995.00
142,715.200 LINK
0.8777%
23
Kraken
LINK-USD$12.00
0.0046042 Eth
$1,585,422.00
132,172.380 LINK
0.8128%
24
Bitvavo
LINK-EUR$11.99
0.0046029 Eth
$1,310,971.00
109,379.088 LINK
0.6726%
25
Kraken
LINK-USDT$11.99
0.0046032 Eth
$1,222,545.00
101,994.185 LINK
0.6272%
26
BYDFi
LINK-USDT$11.92
0.0045837 Eth
$1,135,714.00
95,274.920 LINK
0.5859%
27
Bitexen
LINK-TRY$11.99
0.0046054 Eth
$1,123,510.00
93,698.830 LINK
0.5762%
28
FMCPAY
LINK-USDT$11.98
0.0045937 Eth
$1,081,307.00
87,867.005 LINK
0.5404%
29
Hotcoin
LINK-USDT$11.95
0.0045885 Eth
$963,859.00
80,669.700 LINK
0.4961%
30
Bitexen
LINK-USDT$11.99
0.0046032 Eth
$928,560.00
77,476.250 LINK
0.4765%
31
Dex-Trade
LINK-USDT$11.98
0.0045950 Eth
$806,462.00
67,315.820 LINK
0.4140%
32
Azbit
LINK-ETH$11.99
0.0046008 Eth
$773,456.00
63,400.610 LINK
0.3899%
33
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.00
0.0046092 Eth
$610,078.00
50,924.914 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.3132%
34
Bybit
LINK-USDC$11.98
0.0046010 Eth
$607,914.00
49,600.528 LINK
0.3050%
35
FMCPAY
LINK-BTC$12.00
0.0046007 Eth
$591,389.00
48,830.000 LINK
0.3003%
36
Bithumb
LINK-KRW$12.02
0.0046170 Eth
$568,242.00
47,265.355 LINK
0.2907%
37
BigONE
LINK-USDT$11.98
0.0045967 Eth
$551,197.00
46,026.920 LINK
0.2831%
38
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.92
0.0045773 Eth
$497,042.00
40,873.408 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2514%
39
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.93
0.0045830 Eth
$473,338.00
39,078.686 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.2403%
40
EXMO
LINK-USDT$11.98
0.0046013 Eth
$439,414.00
36,677.138 LINK
0.2256%
41
CoinEx
LINK-USDT$11.99
0.0045988 Eth
$428,667.00
35,091.988 LINK
0.2158%
42
FMCPAY
LINK-ETH$12.00
0.0046013 Eth
$409,086.00
33,506.400 LINK
0.2061%
43
ProBit Global
LINK-BTC$11.98
0.0045996 Eth
$409,055.00
34,155.789 LINK
0.2100%
44
WhiteBIT
LINK-EUR$11.94
0.0045857 Eth
$399,631.00
33,467.170 LINK
0.2058%
45
Gemini
LINK-USD$11.97
0.0045977 Eth
$388,207.00
32,425.507 LINK
0.1994%
46
PointPay
LINK-USDT$11.99
0.0045981 Eth
$382,592.00
31,210.317 LINK
0.1919%
47
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.95
0.0045882 Eth
$343,750.00
28,254.316 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1738%
48
LATOKEN
LINK-USDT$11.99
0.0045975 Eth
$334,461.00
27,897.714 LINK
0.1716%
49
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$12.00
0.0046099 Eth
$308,489.00
25,300.737 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1556%
50
Coinbase Exchange
LINK-USDT$12.01
0.0046126 Eth
$281,690.00
23,453.175 LINK
0.1442%
51
Phemex
LINK-USDT$11.99
0.0046050 Eth
$247,128.00
20,609.210 LINK
0.1267%
52
LATOKEN
LINK-BTC$11.98
0.0045949 Eth
$218,958.00
18,273.938 LINK
0.1124%
53
BitMart
LINK-BTC$11.99
0.0045986 Eth
$181,350.00
15,123.040 LINK
0.0930%
54
BitDelta
LINK-USDT$12.00
0.0046019 Eth
$144,994.00
11,776.000 LINK
0.0724%
55
Coinbase Exchange
LINK-GBP$11.96
0.0045943 Eth
$136,377.00
11,399.740 LINK
0.0701%
56
Hotcoin
LINK-ETH$11.99
0.0046029 Eth
$129,698.00
10,821.020 LINK
0.0665%
57
Hotcoin
LINK-BTC$11.98
0.0046017 Eth
$120,240.00
10,034.570 LINK
0.0617%
58
BYDFi
LINK-USDC$12.00
0.0046047 Eth
$117,370.00
9,777.450 LINK
0.0601%
59
PancakeSwap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.00
0.0046023 Eth
$114,852.00
9,567.457 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0588%
60
Slex
LINK-BTC$12.00
0.0046029 Eth
$107,148.00
8,851.700 LINK
0.0544%
61
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.93
0.0045830 Eth
$78,692.00
80,625.265 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.4958%
62
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$12.00
0.0046099 Eth
$78,126.00
80,131.305 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.4928%
63
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$11.98
0.0045994 Eth
$75,256.00
6,223.262 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0383%
64
Slex
LINK-ETH$11.99
0.0045987 Eth
$75,220.00
6,173.690 LINK
0.0380%
65
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$11.97
0.0045967 Eth
$71,359.00
5,851.232 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0360%
66
WhiteBIT
LINK-TRY$11.99
0.0046032 Eth
$67,669.00
5,645.410 LINK
0.0347%
67
PointPay
LINK-BTC$11.99
0.0045998 Eth
$62,561.00
5,175.552 LINK
0.0318%
68
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$11.98
0.0045952 Eth
$62,121.00
5,026.528 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0309%
69
Bitso
LINK-USD$11.99
0.0046036 Eth
$61,714.00
5,148.833 LINK
0.0317%
70
Bitget
LINK-EUR$12.02
0.0046154 Eth
$51,785.00
4,204.980 LINK
0.0259%
71
Binance US
LINK-USDT$11.98
0.0045934 Eth
$50,863.00
4,246.020 LINK
0.0261%
72
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$11.94
0.0045860 Eth
$46,424.00
3,874.714 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0238%
73
OKX
LINK-USDC$11.98
0.0045997 Eth
$45,050.00
3,627.937 LINK
0.0223%
74
EXMO
LINK-BTC$11.99
0.0046045 Eth
$39,110.00
3,262.189 LINK
0.0201%
75
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$11.96
0.0045933 Eth
$38,463.00
39,528.611 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.2431%
76
Mercado Bitcoin
LINK-BRL$11.95
0.0045876 Eth
$32,501.00
2,720.696 LINK
0.0167%
77
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$12.01
0.0046105 Eth
$27,881.00
2,328.147 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0143%
78
Pangolin
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.94
0.0045839 Eth
$20,687.00
1,726.604 0X5947BB275C521040051D82396192181B413227A3
0.0106%
79
KuCoin
LINK-KCS$11.94
0.0045859 Eth
$16,168.00
1,353.939 LINK
0.0083%
80
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$12.00
0.0046081 Eth
$14,094.09
1,170.898 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0072%
81
LFJ
0X5947BB275C521040051D82396192181B413227A3-0XB31F66AA3C1E785363F0875A1B74E27B85FD66C7$11.96
0.0045928 Eth
$14,092.67
1,166.402 0X5947BB275C521040051D82396192181B413227A3
0.0072%
82
Coinone
LINK-KRW$11.96
0.0045936 Eth
$11,222.63
938.226 LINK
0.0058%
83
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$11.93
0.0045830 Eth
$9,021.39
9,268.106 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0570%
84
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$12.01
0.0046138 Eth
$8,093.88
670.620 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0041%
85
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$11.99
0.0046048 Eth
$7,951.66
12.755 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0001%
86
Korbit
LINK-KRW$11.95
0.0045878 Eth
$6,689.43
550.307 LINK
0.0034%
87
CoinEx
LINK-USDC$11.97
0.0045903 Eth
$4,542.86
372.852 LINK
0.0023%
88
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$12.03
0.0046122 Eth
$4,538.43
368.896 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0023%
89
Ramses V2
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.96
0.0045871 Eth
$4,117.07
340.167 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0021%
90
CoinEx
LINK-BTC$11.98
0.0045931 Eth
$3,484.37
288.201 LINK
0.0018%
91
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$11.97
0.0045902 Eth
$2,618.85
212.922 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0013%
92
PancakeSwap V3 (Arbitrum)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$11.94
0.0045862 Eth
$1,929.21
159.012 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0010%
93
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$11.95
0.0045895 Eth
$1,897.16
154.497 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0010%
94
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$11.97
0.0045990 Eth
$1,785.26
142.420 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0009%
95
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X7F5C764CBC14F9669B88837CA1490CCA17C31607$11.91
0.0045720 Eth
$1,740.50
144.153 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0009%
96
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$12.00
0.0046076 Eth
$1,276.08
104.937 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0006%
97
Uniswap V3 (Optimism)
0X0B2C639C533813F4AA9D7837CAF62653D097FF85-0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6$11.93
0.0045803 Eth
$1,187.08
1,205.686 0X0B2C639C533813F4AA9D7837CAF62653D097FF85
0.0074%
98
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X61299774020DA444AF134C82FA83E3810B309991$11.93
0.0045749 Eth
$1,180.34
97.571 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0006%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$11.99
0.0045996 Eth
$1,115.63
90.863 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0006%
100
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0XBB4CDB9CBD36B01BD1CBAEBF2DE08D9173BC095C$12.03
0.0046122 Eth
$922.41
76.624 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0005%

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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