ETH Price: $3,625.35 (+0.10%)
 

Overview

Max Total Supply

1,000,000,000 LINK

Holders

729,316 ( 0.001%)

Market

Price

$23.49 @ 0.006479 ETH (-1.26%)

Onchain Market Cap

$23,490,000,000.00

Circulating Supply Market Cap

$14,824,260,379.00

Other Info

Token Contract (WITH 18 Decimals)

Balance
0 LINK

Value
$0.00
0xcd795d44d18a663f7ca16fbd57a0c6dbed8e62d3
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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 21254.55% |ETH 0.0003846 1584.61%

Market

Volume (24H):$866,640,091.00
Market Capitalization:$14,824,260,379.00
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
Coinbase Exchange
LINK-USD$23.48
0.0064779 Eth
$29,872,554.00
1,272,092.750 LINK
9.7918%
2
Slex
LINK-USDT$23.46
0.0064801 Eth
$23,364,576.00
1,001,106.430 LINK
7.7059%
3
Bitget
LINK-USDT$23.54
0.0064924 Eth
$22,740,788.00
971,835.144 LINK
7.4806%
4
P2B
LINK-USDT$23.50
0.0064739 Eth
$19,145,044.00
814,607.250 LINK
6.2703%
5
Bybit
LINK-USDT$23.49
0.0064797 Eth
$18,910,320.00
808,017.869 LINK
6.2196%
6
MEXC
LINK-USDT$23.49
0.0064664 Eth
$18,737,301.00
797,817.480 LINK
6.1411%
7
CoinW
LINK-USDT$23.55
0.0064877 Eth
$17,040,130.00
723,607.970 LINK
5.5699%
8
OKX
LINK-USDT$23.49
0.0064787 Eth
$12,491,086.00
534,142.226 LINK
4.1115%
9
DigiFinex
LINK-USDT$23.50
0.0064840 Eth
$11,534,101.00
490,709.400 LINK
3.7772%
10
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.54
0.0064948 Eth
$11,413,650.00
486,269.695 0X514910771AF9CA656AF840DFF83E8264ECF986CA
3.7430%
11
HTX
LINK-USDT$23.48
0.0064787 Eth
$9,668,235.00
414,288.952 LINK
3.1889%
12
XT.COM
LINK-USDT$23.49
0.0064789 Eth
$9,081,462.00
388,593.860 LINK
2.9912%
13
Coinstore
LINK-USDT$23.47
0.0064742 Eth
$8,190,815.00
350,527.220 LINK
2.6981%
14
Biconomy.com
LINK-USDT$23.46
0.0064710 Eth
$6,449,648.00
276,143.690 LINK
2.1256%
15
Bithumb
LINK-KRW$23.66
0.0065254 Eth
$5,986,086.00
253,049.288 LINK
1.9478%
16
BYDFi
LINK-USDT$23.48
0.0064758 Eth
$5,938,377.00
252,941.420 LINK
1.9470%
17
Azbit
LINK-USDT$23.49
0.0064787 Eth
$5,880,963.00
250,903.791 LINK
1.9313%
18
Kraken
LINK-USD$23.49
0.0064787 Eth
$5,186,719.00
220,843.382 LINK
1.6999%
19
LATOKEN
LINK-USDT$23.58
0.0064934 Eth
$4,486,910.00
190,316.630 LINK
1.4649%
20
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.49
0.0064786 Eth
$3,212,933.00
137,402.959 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
1.0576%
21
Dex-Trade
LINK-USDT$23.59
0.0064960 Eth
$2,948,781.00
125,023.290 LINK
0.9624%
22
KuCoin
LINK-USDT$23.49
0.0064799 Eth
$2,769,313.00
117,892.019 LINK
0.9075%
23
CoinEx
LINK-USDT$23.47
0.0064737 Eth
$2,681,727.00
114,579.214 LINK
0.8820%
24
Hotcoin
LINK-USDT$23.48
0.0064758 Eth
$2,585,001.00
110,107.640 LINK
0.8475%
25
Bitvavo
LINK-EUR$23.50
0.0064820 Eth
$2,420,881.00
103,016.609 LINK
0.7930%
26
Coinbase Exchange
LINK-BTC$23.48
0.0064754 Eth
$2,009,455.00
85,593.480 LINK
0.6588%
27
Dcoin
LINK-USDT$23.56
0.0064905 Eth
$1,814,290.00
77,009.000 LINK
0.5928%
28
EXMO
LINK-USDT$23.50
0.0064824 Eth
$1,274,299.00
54,227.443 LINK
0.4174%
29
PointPay
LINK-USDT$23.49
0.0064789 Eth
$1,246,407.00
53,380.464 LINK
0.4109%
30
Bybit
LINK-USDC$23.48
0.0064772 Eth
$1,240,456.00
52,755.950 LINK
0.4061%
31
tanX
LINK-USDC$23.48
0.0064773 Eth
$1,114,323.00
47,665.740 LINK
0.3669%
32
Phemex
LINK-USDT$23.54
0.0064924 Eth
$1,112,635.00
47,274.570 LINK
0.3639%
33
Coinbase Exchange
LINK-EUR$23.51
0.0064854 Eth
$915,186.00
38,927.170 LINK
0.2996%
34
Bitbank
LINK-JPY$23.52
0.0064886 Eth
$898,991.00
38,221.029 LINK
0.2942%
35
WhiteBIT
LINK-BTC$23.49
0.0064776 Eth
$822,740.00
35,027.070 LINK
0.2696%
36
WhiteBIT
LINK-TRY$23.52
0.0064754 Eth
$714,093.00
30,361.540 LINK
0.2337%
37
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.46
0.0064715 Eth
$713,225.00
30,453.394 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.2344%
38
Uniswap V3 (Ethereum)
0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984-0X514910771AF9CA656AF840DFF83E8264ECF986CA$23.49
0.0064801 Eth
$631,023.00
41,519.946 0X1F9840A85D5AF5BF1D1762F925BDADDC4201F984
0.3196%
39
Coinbase Exchange
LINK-GBP$23.50
0.0064838 Eth
$576,822.00
24,541.140 LINK
0.1889%
40
EarnBIT
LINK-USDT$23.45
0.0064680 Eth
$572,534.00
24,512.094 LINK
0.1887%
41
itBit
LINK-USD$23.54
0.0064731 Eth
$529,886.00
22,510.036 LINK
0.1733%
42
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.56
0.0065001 Eth
$527,388.00
22,424.670 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1726%
43
Camelot V3
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.46
0.0064724 Eth
$519,671.00
22,187.545 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.1708%
44
Slex
LINK-ETH$23.45
0.0064691 Eth
$424,015.00
18,092.080 LINK
0.1393%
45
Bitbegin
LINK-USDT$23.48
0.0064643 Eth
$421,141.00
18,018.377 LINK
0.1387%
46
BigONE
LINK-USDT$23.40
0.0064546 Eth
$414,326.00
17,707.010 LINK
0.1363%
47
Quickswap (v3)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.54
0.0064934 Eth
$412,718.00
410,053.641 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
3.1563%
48
Quickswap (v3)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.55
0.0064970 Eth
$386,100.00
16,414.886 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.1264%
49
Binance
LINK-TRY$23.51
0.0064828 Eth
$369,768.00
15,829.460 LINK
0.1218%
50
Gemini
LINK-USD$23.46
0.0064729 Eth
$346,126.00
14,750.809 LINK
0.1135%
51
BitMart
LINK-BTC$23.47
0.0064746 Eth
$284,315.00
12,113.600 LINK
0.0932%
52
GMO Japan
LINK-JPY$23.58
0.0065030 Eth
$267,522.00
11,347.300 LINK
0.0873%
53
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.54
0.0064948 Eth
$255,168.00
10,842.608 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0835%
54
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.43
0.0064650 Eth
$244,864.00
244,597.708 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
1.8828%
55
Bitci TR
LINK-TRY$23.69
0.0065330 Eth
$240,628.00
10,324.990 LINK
0.0795%
56
Coinbase Exchange
LINK-ETH$23.52
0.0064866 Eth
$231,987.00
9,865.320 LINK
0.0759%
57
LATOKEN
LINK-BTC$23.48
0.0064762 Eth
$211,926.00
9,027.389 LINK
0.0695%
58
OKX
LINK-USDC$23.47
0.0064730 Eth
$208,871.00
8,930.195 LINK
0.0687%
59
Coinone
LINK-KRW$23.65
0.0065237 Eth
$203,762.00
8,616.091 LINK
0.0663%
60
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFD086BC7CD5C481DCC9C85EBE478A1C0B69FCBB9$23.48
0.0064760 Eth
$201,437.00
8,621.531 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0664%
61
Binance US
LINK-USDT$23.46
0.0064732 Eth
$164,491.00
7,010.168 LINK
0.0540%
62
CoinEx
LINK-USDC$23.51
0.0064735 Eth
$161,202.00
6,992.722 LINK
0.0538%
63
PointPay
LINK-BTC$23.49
0.0064786 Eth
$157,691.00
6,770.024 LINK
0.0521%
64
Bitkub
LINK-THB$23.36
0.0064466 Eth
$143,843.00
6,158.327 LINK
0.0474%
65
BitStorage
LINK-ETH$23.53
0.0064904 Eth
$142,714.00
6,066.080 LINK
0.0467%
66
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X0D500B1D8E8EF31E21C99D1DB9A6444D3ADF1270$23.53
0.0064899 Eth
$138,290.00
5,904.614 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0455%
67
Bitso
LINK-USD$23.49
0.0064801 Eth
$130,271.00
5,545.179 LINK
0.0427%
68
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X7CEB23FD6BC0ADD59E62AC25578270CFF1B9F619$23.47
0.0064753 Eth
$126,733.00
5,395.202 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0415%
69
BTCMarkets
LINK-AUD$23.33
0.0064236 Eth
$117,879.00
5,052.172 LINK
0.0389%
70
DeGate
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XA0B86991C6218B36C1D19D4A2E9EB0CE3606EB48$23.53
0.0064895 Eth
$101,647.00
4,349.780 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0335%
71
Uniswap V3 (Optimism)
0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6-0X4200000000000000000000000000000000000006$23.50
0.0064834 Eth
$97,971.00
4,171.539 0X350A791BFC2C21F9ED5D10980DAD2E2638FFA7F6
0.0321%
72
EXMO
LINK-BTC$23.54
0.0064943 Eth
$96,958.00
4,118.454 LINK
0.0317%
73
BitMart
LINK-ETH$23.46
0.0064706 Eth
$96,368.00
4,108.380 LINK
0.0316%
74
Hotcoin
LINK-BTC$23.48
0.0064761 Eth
$89,416.00
3,808.450 LINK
0.0293%
75
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.49
0.0064786 Eth
$77,489.00
77,232.413 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.5945%
76
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X2791BCA1F2DE4661ED88A30C99A7A9449AA84174$23.44
0.0064667 Eth
$73,876.00
3,154.193 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0243%
77
CoinEx
LINK-BTC$23.46
0.0064717 Eth
$52,095.00
2,217.057 LINK
0.0171%
78
Mercado Bitcoin
LINK-BRL$23.47
0.0064755 Eth
$49,464.00
2,107.088 LINK
0.0162%
79
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X2F2A2543B76A4166549F7AAB2E75BEF0AEFC5B0F$23.44
0.0064667 Eth
$48,213.00
2,061.645 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0159%
80
Solidly V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XC02AAA39B223FE8D0A0E5C4F27EAD9083C756CC2$23.47
0.0064749 Eth
$40,536.00
1,728.218 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0133%
81
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.49
0.0064783 Eth
$34,960.00
1,883.026 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0145%
82
Korbit
LINK-KRW$23.56
0.0064993 Eth
$32,830.00
1,394.596 LINK
0.0107%
83
Hotcoin
LINK-ETH$23.46
0.0064710 Eth
$30,651.00
1,306.540 LINK
0.0101%
84
THENA FUSION
0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827-0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD$23.49
0.0064783 Eth
$30,020.00
38.417 0X52F24A5E03AEE338DA5FD9DF68D2B6FAE1178827
0.0003%
85
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0X82AF49447D8A07E3BD95BD0D56F35241523FBAB1$23.44
0.0064647 Eth
$23,494.00
1,000.831 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0077%
86
Gemini
LINK-BTC$23.47
0.0064757 Eth
$21,338.00
908.963 LINK
0.0070%
87
zondacrypto
LINK-PLN$23.45
0.0064489 Eth
$20,817.00
887.713 LINK
0.0068%
88
Dex-Trade
LINK-ETH$23.47
0.0064767 Eth
$16,161.82
688.540 LINK
0.0053%
89
Uniswap V3 (Ethereum)
0X514910771AF9CA656AF840DFF83E8264ECF986CA-0XDAC17F958D2EE523A2206206994597C13D831EC7$23.51
0.0064859 Eth
$16,077.11
689.345 0X514910771AF9CA656AF840DFF83E8264ECF986CA
0.0053%
90
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XC2132D05D31C914A87C6611C10748AEB04B58E8F$23.59
0.0065072 Eth
$14,794.98
631.481 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0049%
91
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0X1BFD67037B42CF73ACF2047067BD4F2C47D9BFD6$23.53
0.0064911 Eth
$11,742.42
501.865 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0039%
92
Uniswap V3 (Arbitrum One)
0XAF88D065E77C8CC2239327C5EDB3A432268E5831-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.58
0.0064969 Eth
$7,863.99
7,780.839 0XAF88D065E77C8CC2239327C5EDB3A432268E5831
0.0599%
93
Uniswap V3 (Polygon)
0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359-0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39$23.46
0.0064723 Eth
$6,277.96
6,260.146 0X3C499C542CEF5E3811E1192CE70D8CC03D5C3359
0.0482%
94
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X55D398326F99059FF775485246999027B3197955$23.39
0.0064529 Eth
$4,573.62
195.609 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0015%
95
Ace
LINK-USDT$23.58
0.0064929 Eth
$3,639.06
155.630 LINK
0.0012%
96
Uniswap V3 (Polygon)
0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39-0XD6DF932A45C0F255F85145F286EA0B292B21C90B$23.57
0.0064939 Eth
$3,262.07
137.502 0X53E0BCA35EC356BD5DDDFEBBD1FC0FD03FABAD39
0.0011%
97
Uniswap V3 (Arbitrum One)
0X912CE59144191C1204E64559FE8253A0E49E6548-0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4$23.47
0.0064822 Eth
$2,722.99
3,267.492 0X912CE59144191C1204E64559FE8253A0E49E6548
0.0252%
98
Uniswap V3 (Arbitrum One)
0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4-0XFA7F8980B0F1E64A2062791CC3B0871572F1F7F0$23.44
0.0064667 Eth
$1,713.24
72.528 0XF97F4DF75117A78C1A5A0DBB814AF92458539FB4
0.0006%
99
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X2170ED0880AC9A755FD29B2688956BD959F933F8$23.47
0.0064736 Eth
$1,112.01
47.398 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%
100
Uniswap V3 (BSC)
0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD-0X8AC76A51CC950D9822D68B83FE1AD97B32CD580D$23.52
0.0064954 Eth
$1,063.21
45.540 0XF8A0BF9CF54BB92F17374D9E9A321E6A111A51BD
0.0004%

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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