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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: April 13, 2015, 12:48:10 AM
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Jumbucks Development UpdateI wanted to give a quick update. Jumbucks is over 7 months old now (launched September 2nd, 2014) but I've always considered it very early for cryptocurrencies in general. That's taking the long term view to digital currency adoption. We've seen a lot of coins come and go so when I started my own coin I really wanted to make something which would "stand the test of time". Longevity is still a goal and a constant challenge but that is something a coin developer should accept and rise to. Their goal should always be to provide more value to the coin and in my view, in the most ethical way possible. A lot of the possible security flaws with Proof of Stake come with a poor Proof of Stake network where not many coins are staking and bad actors can exploit the network. Thankfully Jumbucks isn't in this position and has performed very well in terms of stake percentage ( typically over 50%). This is something I planned for when I implemented 8% Proof of Stake interest. My thinking was that this was a good balance between early adopter staking, long term investing, coin distribution, inflation, etc… One thing I want to do is move towards Proof of Stake 2.0 as implemented in Blackcoin. This addresses some more possible security vulnerabilities. I'll be testing this out with certain changes so that staking remains smooth and stable. We have implemented quite a few code changes over time such as RPC additions and fixes, the MAX_BLOCK_STAKE_REWARD setting, Gitian build scripts to the Jumbucks code base. In the future, should cryptocurrencies take off we'll want to have dedicated devices to perform our staking duties. We don't believe in centralized cloud staking as this is insecure and gives too much power to a single entity. We're working on something to address this and make Proof of Stake more safe, secure and automated. We'll also be discussing this with some other coin communities as well so they can benefit from our work. The MAX_BLOCK_STAKE_REWARD setting in Jumbucks also discourages centralized staking by capping rewards and encouraging a well distributed Proof of Stake network. The MAX_BLOCK_STAKE_REWARD setting also prevents possible Proof of Stake coin inflation attacks which can be caused by single entities such as exchanges who are in control of a large amount of idle coins and can mint a large amount of coins. There has been examples of this happening and this is a real threat. I've started a short whitepaper as well which outlines the MAX_BLOCK_STAKE_REWARD setting. Another thing we'll do is move our primary real-time communications system from IRC to Slack. Slack has quite a few benefits such as more modern integrations and should be inviting for newcomers. We actually have Jumbucks Slack set up already but we want to test out a few things (such as a public gateway, interactive elements, bots) before opening it up to the public. The free version of Slack is limited to 5 integrations so we want to make sure we use those to the fullest. I Tweeted at one point early on that I wasn't going to comment about price for JBS. That still remains true and I've refrained from retweeting or mentioning anything price related. Ultimately price should reflect value so we want JBS to be viewed as a long term coin with dedicated developers. Basically JBS is a coin that I would personally invest in, had someone else created it. JBS was always viewed as my experimental coin and the work is also intended to add value be it through more services, better infrastructure and so forth. I spend a lot of time checking out various blockchain related projects and discussing them with the other Jumbucks developer @iquidus. One thing we really want to do is something along the lines of a distributed hash table for data storage, tied to the Jumbucks blockchain. Thank you for your support and for following along. - Julian Jumbucks is a Fair Launch cryptocurrency which launched without an IPO and with zero premine. Jumbucks currently runs as 100% Proof of Stake, and is currently traded on Bittrex, Cryptsy and will be available at launch on the upcoming AltMarket.com. Find out more information at GetJumbucks.com.
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: March 15, 2015, 11:03:07 AM
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Jumbucks Announces Official Raspberry Pi and Linux builds; bootstrap.dat fileThe development team at Jumbucks are currently working on a larger project for the coin (and one that will benefit other Proof of Stake coins) so we wanted to provide something for the community along the lines of where we are going. We were very excited when the new Raspberry Pi 2 came out as this new model had 4 cores and bumped up the RAM to 1 GB. We instantly ordered some to test things out such as active staking for the past few weeks and were pleased with the results. Staking works great with Jumbucks on the Raspberry Pi 2! Keeping the hacker spirit alive, we are announcing official Jumbucks builds for Raspberry Pi and Linux. These are available now at the Jumbucks 1.7 Release page on Github. The latest upload files are: d7bc7c926f14458c21f8571ddfb0b679 Jumbucks-1.7-RPi.tar.xz
a3917738e4fd5735bf89b68702fdcf07 Jumbucks-1.7-linux32.tar.xz
21ccde0cceb8f7109edf05d02c4dc92a Jumbucks-1.7-linux64.tar.xz
0a747ca4dc608a043adb31147a396e26 bootstrap.dat.xz
We have also added a bootstrap.dat file. bootstrap.dat allows a new Jumbucks client (not synced) to rapidly import the initial blocks from a local file instead of slowly downloading blocks from random peers. This significantly reduces the time it takes to get a client synced with the current blockchain (minutes instead of hours). Simply having bootstrap.dat in Jumbucks' expected data directory will make your initial block sync much faster. Regardless of your operating system use the following steps to make use of the bootstrap.dat file: - Download bootstrap.dat.xz.
- Verify the integrity of bootstrap.dat.xz with the checksums.
- Decompress to obtain bootstrap.dat.
- Put it into the Jumbucks datadir. This is the same folder that contains wallet.dat and the blocks folder.
- Delete bootstrap.dat.old if you want to recover some storage space.
Extract bootstrap.datLinuxMacYou can obtain xz from Homebrew or MacPorts. Windows7Zip is a free utility that can decompress .xz files. The latest version of WinRAR also supports .xz files. Copy bootstrap.dat to data directoryCopy bootstrap.dat to your data directory. After Jumbucks has used bootstrap.dat, the file will be renamed to bootstrap.dat.old; at this point you can choose to delete it or keep it. LinuxJumbucks' data directory is located in ~/.coinmarketscoin/ by default. MacJumbucks' data directory should be located in ~/Library/Application Support/Coinmarketscoin/. WindowsGo to Start>Run (or press WinKey+R) and run: explorer %APPDATA%\Coinmarketscoin Jumbucks' data directory will open. "AppData" and "Application Data" are hidden by default in Windows. Here is the process snapshot of a Raspberry Pi 2 that is actively staking! Jumbucks is a Fair Launch cryptocurrency which launched without an IPO and with zero premine. Jumbucks currently runs as 100% Proof of Stake, and is currently traded on Bittrex, Cryptsy and will be available at launch on the upcoming AltMarket.com. Find out more information at GetJumbucks.com.
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: February 16, 2015, 02:50:55 AM
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Jumbucks Announces a New Official Developer On The TeamJumbucks is proud to announce a new official developer on the team, Luke Williams. Founder's statement (Julian Yap): A good developer is hard to find, especially in the realm of cryptocurrency. A good developer should not only possess the right skill set (or potential to acquire this), but also have a correct mentality surrounding the goals and ethics of the project, in addition to the principles for which cryptocurrencies stand. When I first spoke to Luke, we hit it off immediately as it became clear that he clearly understood my goals for Jumbucks as a cryptocurrency. Over the past several weeks we have discussed several longer-term projects which we would like to explore for Jumbucks, about which we both saw eye to eye. Luke is the kind of developer who knows how to bring a project from inception to completion and oversee its future growth. He is also the first developer I have asked to come on board with Jumbucks and we are very excited to have him on the team.Luke has over 10 years of coding experience, and is proficient in: C, C++, Perl, Python, and Node.js, to name only a few. He is a huge Slackware Linux fan (user since '00), and maintains a number of scripts to assist with package management and dependency resolution. His experience also includes security, web development, software development, and has a background in science. When not working on various open source projects (such as Iquidus Explorer), he designs and implements customized systems for chemistry laboratories in New Zealand. He is very passionate about cryptocurrencies and envisions a future where many of societies' core systems are completely transparent, decentralized, and running on blockchains. The best way to contact Luke is through IRC: xocel, or Twitter: @iquidus. "The full power of blockchain technology has yet to be released, its benefits will extend far beyond currency. The JBS blockchain provides a great platform upon which new services and systems can be built. I'm very excited to join the Jumbucks team."
Luke Williams, Jumbucks developer
Jumbucks is a Fair Launch cryptocurrency which launched without an IPO and with zero premine. Jumbucks currently runs as 100% Proof of Stake, and is currently traded on Bittrex, Cryptsy and will be available at launch on the upcoming AltMarket.com. Find out more information at GetJumbucks.com.
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: January 21, 2015, 10:27:59 AM
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New Wallet Version 1.7 - Mandatory upgrade before block 250,000Hi all, A new wallet version 1.7 has been released for Jumbucks. This is a mandatory upgrade before block 250,000. This update includes a new inflation control and security setting called MAX_STAKE_BLOCK_REWARD as well as a modified Proof of Stake schedule for the long term future. This version has been extensively tested so no issues should be apparent. Directions:Backup your wallet.dat file Shut down the current wallet Install the new version Start the new version and verify everything works Download links:Mac OS X: http://getjumbucks.com/download/Jumbucks-Qt-1.7-signed-osx.dmgMD5: 760c0f08d48d2c7c91a0c3e0ea6fb820 Wallet built and signed by @jyap. Windows: http://getjumbucks.com/download/Jumbucks-1.7-windows.zipMD5: e15aca9e5dca67f47e67045b63e2170e Wallet built by @jyap. Github: https://github.com/jyap808/jumbucks/releases/tag/v1.7Changes:- Upgrade from version 1.5 to 1.7
- Update PROTOCOL_VERSION from 60013 to 60014
- Add MAX_STAKE_BLOCK_REWARD and set Proof of Stake schedule
- Hard fork at block 250,000 where MAX_STAKE_BLOCK_REWARD will be enabled
Updated Proof of Stake Schedule:- Year 1 from Block 250,000. 8% interest and MAX_STAKE_BLOCK_REWARD = 4
- Year 2. 5% interest and MAX_STAKE_BLOCK_REWARD = 2.5
- Year 10 onwards. 2% interest and MAX_STAKE_BLOCK_REWARD = 1
Further details about MAX_STAKE_BLOCK_REWARD in this post. Signed version tag:This version has been tagged and signed as v1.7 in Git. Verify it using my GPG public key on https://keybase.io/jyap. $ git tag -v v1.7
object 1f38e39f559dcf3ab3147df2ea4cc07af6e97987
type commit
tag v1.7
tagger Julian Yap <> 1421739853 -1000
Signed 1.7 tag
gpg: Signature made Mon Jan 19 21:44:13 2015 HST using RSA key ID 7F661F0A
gpg: Good signature from "Julian Yap <>"
gpg: aka "keybase.io/jyap <>"
Thanks, Julian
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: January 18, 2015, 10:56:06 AM
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MAX_STAKE_BLOCK_REWARD inflation control for Proof of Stake coin JumbucksThis outlines a new setting called MAX_STAKE_BLOCK_REWARD that I intend to introduce to Jumbucks. One of the common criticisms of the original Proof of Stake coin Peercoin is of the setting Maximum Coin Age. With Peercoin the Minimum Coin Age is 30 days and the Maximum Coin Age is 90 days. This means that coins must be idle for a minimum of 30 days to be eligible for staking. Proof of Stake is based around stake weight which is calculated based on the amount of coins you have and the cumulative coin age. Enforcing a Maximum Coin Age however means that it may not be possible for stakers with smaller amounts of coins to ever generate a Proof of Stake block as they may never gather enough stake weight within the Maximum Coin Age period to be eligible to stake a block. Essentially those who have a large amount of coins stake the most amount of coins, for example this address which has over 550k PPC and this address which has over 220k PPC. To put this into perspective for a smaller staker, someone who is consistently staking 4000 PPC will stake approximately 5 blocks per month. Someone who is staking 550 PPC will stake approximately 1 block a month. Most Proof of Stake coins these days set their Maximum Coin Age to Unlimited which helps to solve this issue so that smaller stakers can still generate enough stake weight. One downside to having an Unlimited Maximum Coin Age is that someone is able to accumulate a very large stake weight by not staking their coins for a long time and then later bringing them back on to the network and staking them. This can lead to "inflationary spikes" where lots of new coins are minted in a short span of time. Here is an Inflation Chart of Jumbucks for the last 100k blocks where inflationary spikes can be observed.  Here is an Inflation Chart of a random Proof of Stake alt coin for the last 100k blocks where this can also be observed.  Here is a section of an Inflation Chart of a random Proof of Stake alt coin with a very pronounced inflation spike.  MAX_STAKE_BLOCK_REWARD will be a new setting which defines the Maximum Reward that a Proof of Stake block can yield. In my proposal, the maximum reward will be set to 50% of the Proof of Stake interest rate so 8% Proof of Stake interest would have a MAX_STAKE_BLOCK_REWARD setting of 4 JBS. This setting should only effect a small percentage of blocks but will have very positive effects overall. This will have the following effect: - Jumbucks will not experience inflation spikes in coin supply.
- Coin supply and inflation will be more predictable and smoother, similar to Proof of Work coins with a fixed emission schedule.
- Larger stakers will be encouraged to stake more often so that their rewards stay within the MAX_BLOCK_STAKE_REWARD limit.
- MAX_BLOCK_STAKE_REWARD will serve as a security and safety check so that large Proof of Stake block rewards can't be mined.
- Unlimited Maximum Coin Age can be retained so that Proof of Stake miners with smaller amounts of coins can still be fairly rewarded.
It is my belief that a cryptocurrency should be widely distributed and that Proof of Stake coins have a strong and diverse network. This proposed changes reflect those ideals. Please let me know if there are any questions or comments.
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: January 13, 2015, 07:19:12 AM
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Blockparser is a utility I've used to create rich lists. Here is a fork I made with Jumbucks support https://github.com/jyap808/blockparserEDIT: This has been merged in the official project https://github.com/znort987/blockparserSample output. $ ./parser allBalances
info: starting command "allBalances"
info: initializing hash tables
info: estimated number of blocks = 1.65K
info: estimated number of transactions = 0.26M
info: pass 1 -- walk all blocks and build headers ...
info: pass 1 -- took 156 secs, 219349 blocks, 0.12 Gigs, 0.77 Megs/secs
info: pass 2 -- link all blocks ...
info: pass 2 -- done, did 0 late links
info: pass 3 -- wire longest chain ...
info: pass 3 -- done, maxHeight=214892
info: pass 4 -- full blockchain analysis ...
info: computing balance for all addresses
info: 1 blocks, 0.000 MegaAddrs , 0.00% , elapsed = 0.00s , eta = -nans ,
info: sorting by balance ...
info: dumping all balances ...
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
Balance Hash160 Base58 nbIn lastTimeIn nbOut lastTimeOut
---------------------------------------------------------------------------------------------------------------------------------------------------------------------
330896.16000000 fd08dd7eca1e74bb3d6ce3918394dd4d796d33ff JhbrvAmM7kNpwA6wD5KoAsbtikLWWMNPcM 11 Sat Sep 27 18:57:38 2014 8 Mon Dec 22 14:58:30 2014
269006.11541405 5aa5ada8189f6b8f993a37c01b3e95bd2bd802ee JSoEdU717hvz8KQVq2HfcqV9A79Wihzusu 14 Tue Jan 13 04:26:23 2015 9 Fri Jan 9 22:16:59 2015
186342.90000000 577b0a14f8d23aeaf9f97d9be36b5cab407e045c JSWVXHWeYNknPdG9uDrcBoZHztKMFCsndw 6 Mon Dec 8 23:24:24 2014 4 Wed Dec 17 22:53:06 2014
107501.00000000 3c9dd11a9693c152601e9ff569fdca5c803d9081 JQ4SwV3CpvHs9kHzY3sZhZdgb5yWBa6ZXM 1 Fri Jan 9 04:02:37 2015 0 Thu Jan 1 00:00:00 1970
62688.19705628 580184c9040e04cdfbc3d6a85507be90920163b7 JSZGd57bBNdLQktcvRKXMDdx9egFZAzYG3 1503 Wed Dec 31 00:00:09 2014 1256 Wed Dec 31 00:00:09 2014
60639.00000000 f2f3fb79d6159f4e1e913e0a0d12ebe083073ec5 JggZ9HL8mshfZc4NyidrMKjeUBFtDdkySF 8 Fri Nov 7 14:48:50 2014 7 Mon Nov 10 09:09:38 2014
57588.17483961 9689343517c7e61dc566265223fdde460003e68b JYFu4YLn4jqwT6eqprYBD5kZ3sUZ6VcSkH 26818 Tue Jan 13 07:05:53 2015 26599 Tue Jan 13 07:05:53 2015
57049.84879243 7866143d49c22f335ffbdef924087254f5523136 JVWYiGT1Z6ktdaF8C4n9gTsjRQHpajSYNE 2941 Wed Dec 31 02:27:18 2014 2683 Wed Dec 31 02:27:18 2014
55000.00000000 c93df02a68edd310bc4d837b238b24974a510b81 Jct1MmNjfTtzSrppcvVzXUsbY9W3qiTX59 6 Sat Sep 27 13:13:20 2014 5 Thu Oct 2 10:15:38 2014
...
(truncated)
Here is an example of a transaction. $ ./parser txinfo 9d113596487f46ebe89a46bbd5bf2a2c7ce212bb13cfdc94911e752cdaff9a0b
info: starting command "dumpTX"
info: dumping 1 transactions
info: initializing hash tables
info: estimated number of blocks = 1.64K
info: estimated number of transactions = 0.26M
info: pass 1 -- walk all blocks and build headers ...
info: pass 1 -- took 156 secs, 218967 blocks, 0.12 Gigs, 0.76 Megs/secs
info: pass 2 -- link all blocks ...
info: pass 2 -- done, did 0 late links
info: pass 3 -- wire longest chain ...
info: pass 3 -- done, maxHeight=214511
info: pass 4 -- full blockchain analysis ...
TX = {
version = 1
minted in block = 5
mint time = 1409691752 (Tue Sep 2 21:02:32 2014 GMT)
txHash = 9d113596487f46ebe89a46bbd5bf2a2c7ce212bb13cfdc94911e752cdaff9a0b
input[0] = {
0x55 OP_5
OP_PUSHDATA(1, 0x02)
generation transaction
based on block height, reward = 50.00000000
hex dump of coinbase follows:
000000: 55 01 02 U..
}
output[0] = {
value = 1.00000000
challenge script, bytes=25 :
0x76 OP_DUP
0xA9 OP_HASH160
OP_PUSHDATA(20, 0x95739a921628df7a07e52f83c4d53fb75ef0ce18)
0x88 OP_EQUALVERIFY
0xAC OP_CHECKSIG
scriptType = 'pays to hash160(pubKey)'
scriptPaysToAddr = 'JYAAWYZrL4HbuCmPtYCBaebSdLKXsQsFM2'
scriptPaysToHash160 = '95739a921628df7a07e52f83c4d53fb75ef0ce18'
}
nbInputs = 1
nbOutputs = 1
byteSize = 96
lockTime = 3815998976
valueIn = 50.00
valueOut = 1.00
}
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: January 07, 2015, 06:29:51 AM
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Jumbucks Multipool Is Now The Official Multipool For Unobtanium!The Unobtanium community is excited to announce the selection of the Jumbucks Multicoin Multipool as an official UNO pool for X11 and Scrypt miners! "The Jumbucks community is pleased to announce the addition of Unobtanium (UNO) to the growing list of coins integrated into the Jumbucks Multicoin Multipool. Beginning immediately, miners can elect to receive Unobtanium payouts for the mining hash they contribute to the multipool," said Julian Yap, the founder of Jumbucks. "While the Jumbucks multipool will not be mining Unobtanium directly, Scrypt and X11 miners can now accumulate UNO through their mining activities," said Falling Knife, UNO's Community Manager. "Jumbuck's UNO payouts will be acquired through buys from the market, and this consistent buying pressure will further support the price of Unobtanium. This collaboration between the Unobtanium and Jumbucks’ communities is an exciting new option to buoy the price of UNO." Unobtanium is a long time top-50 cryptocurrency on CoinMarketCap.com. Fairly launched in 2013 with no pre-mine, and with an active community and developers, Unobtanium is a rare Sha256d cryptocurrency that has passed through its inflationary phase. Only 250,000 UNO will ever be produced in 300 years. Its unique non-inflationary characteristics have attracted bullion enthusiasts, miners, and long term investors to the Unobtanium community. Jumbucks is a Fair Launch cryptocurrency which launched without an IPO and with zero premine. Jumbucks currently runs as 100% Proof of Stake, and is currently traded on Bittrex, Cryptsy and will be available at launch on the upcoming AltMarket.com. Find out more information at GetJumbucks.com. To get started, miners can point their X11 and Scrypt hash at the Jumbucks multipool, using their UNO deposit address in place of the username. Learn more about mining for Unobtanium payouts at http://mp.getjumbucks.com. For more information on Unobtanium and to engage in the community, visit http://unobtanium.uno.
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: December 18, 2014, 12:22:42 AM
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Jumbucks Christmas Staking Giveaway! Merry Stakemas!As the holiday season approaches, Jumbucks is the gift that keeps on giving! By staking your Jumbucks ($JBS), you become part of a close-knit crypto community focused upon achieving real-world adoption through new use cases and technical innovation.To celebrate the holiday season, and to thank each member of the Jumbucks community for their continued support, we are gifting 200 $JBS to every wallet which has staked coins in the past 2 weeks, and 100 $JBS to everyone who stakes from now until Christmas! (Limit 1 claim per person) In addition to receiving a holiday gift, staking your Jumbucks continues to reward you with the following perks: · 8% interest on your $JBS balance · Securing and strengthening the Jumbucks’ network. · Being part of the Digital FX Revolution! To receive a Jumbucks holiday gift, simply register with this form, stake your coins for the next week, and then awake to a surprise on Christmas morning! Thank you for your continued support of Jumbucks. We hope that you and your loved ones have a great holiday season, and an even better start to 2015. Merry Stakemas, everyone! Fill out this form NOW to participate in the Jumbucks Christmas Staking Giveaway!
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Alternate cryptocurrencies / Announcements (Altcoins) / Re: [JBS] Jumbucks Info & Discussion - Multipool - 5+ Stars POD
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on: November 28, 2014, 10:38:11 AM
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Coins don't belong on exchanges and should be traded in a truly peer to peer fashion
with incentives to do so. †Cryptocurrencies should be allowed to breath to the point
where they become entire vessels for changing established systems. †
We have the technology.
Very interesting marketing strategy there lol Exchanges have a purpose in the ecosystem. There was such a thing as the Vericoin hack on Mintpal where 8 million VRC were lost. But then again, you represent an exchange so you're naturally biased. |
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