Vulnerability in UPnP library used by Bitcoin CoreToday Bitcoin Core put out a warning stating that "Version before 1.9.20151008 of the miniupnpc library are vulnerable to a buffer overflow in the XML parser during initial network discovery". We have made the necessary code changes so that Jumbucks is now compatible with the latest versions of the miniupnpc library. We have also bumped the latest version in the Jumbucks source code to version 1.9.1. Feel free to upgrade via building a new wallet if you are so inclined. The Jumbucks developers have decided we won't be building a new release version just for this change as this issue requires "running a malicious UPnP server on the local network" to crash the application. If this is an issue, disabling UPnP is the recommended course of action as stated in the original announcement. Future versions of the Jumbucks wallet will have the latest version of the miniupnpc library built in unlike future versions of Bitcoin who have decided to disable miniupnpc by default. The benefit of the Jumbucks wallet accept incoming connections from other peers by default greatly outweighs the potential issues that miniupnpc may have that can be worked around or patched in future versions quite easily. Thank you, Julian
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it will be such a great thing once it has 50+ different coins
Don't forget that your favorite coin and coin developer needs to put in the work to have the coin integrated with Coinomi. I have done this work for Jumbucks and run the necessary Electrum servers. |
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Is there a downloadable version of this that doesn't use Github? I can't compile codes at all, and would be really nice to use a wallet like this.
It's on the Google Play App Store. |
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what the POS % and timeframe? thanks
Hey SecretsOfCrypto The last PoW block was block 30k. Jumbucks launched September 2014. There is currently 8% PoS interest with a max stake block reward of 4 JBS. At the end of 2 years, it becomes 5% interest and MAX_STAKE_BLOCK_REWARD = 2.5 At the end of 10 years, it becomes 2% interest and MAX_STAKE_BLOCK_REWARD = 1 Relevant Proof of Stake switchover code below: if (pindexBest->nTime >= 1472688000) // Thu, 01 Sep 2016 00:00:00 UTC
{
// Year 2. 5% interest and MAX_STAKE_BLOCK_REWARD = 2.5
nSubsidy = nCoinAge * 5 * CENT * 33 / (365 * 33 + 8);
nSubsidyLimit = 2.5 * COIN;
}
if (pindexBest->nTime >= 1725148800) // Sun, 01 Sep 2024 00:00:00 UTC
{
// Year 10. 2% interest and MAX_STAKE_BLOCK_REWARD = 1
nSubsidy = nCoinAge * 2 * CENT * 33 / (365 * 33 + 8);
nSubsidyLimit = 1 * COIN;
}
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 Here are some observations. Jumbucks Version 1.9 was released this 22 days ago which allowed time for most to upgrade (over 75% of nodes). In the first yellow box, the Interval column, we can see that thanks to the changes in version 1.9, daily block times are now more stable around the 60 second mark. Prior to this, daily block times were around 48 to 57 seconds. In the 2nd yellow box, the Transactions column, we can see that wiith the addition of the Jumbucks Slack tip bot, transactions have increased nicely. On another note, I have experienced issues with withdrawing Jumbucks from the exchange Cryptsy and so has at least one other person ( https://twitter.com/alex_sterk/status/651462998737879040). I've filed a support ticket with Cryptsy but unfortunately there's not much that can be in this situation. This illustrates a reason why it's important not to hold large amounts of cryptocurrencies on 3rd party exchanges. Don't forget to Join Jumbucks Slack. Currently 17 users online now of 271 registered. Free sign up at: http://slack.getjumbucks.comThank you all for your support as we endeavor to build the best cryptocurrency coin and community. - Julian |
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Jumbucks Slack Tip BotTip bot is live and up and running at Jumbucks Slack! Tips are on the blockchain! Happy tipping! Sign up to Jumbucks Slack here: http://slack.getjumbucks.comTips are onchain, thus viewable on block explorers. If tipped, you will need to wait for the next block before it is added to your tipbot balance. A tx fee will also be taken from your tipbot balance, equivalent to the standard network tx fee. Tips can not exceed your tipbot balance - 0.0005 JBS. This is to ensure there is enough left for the tx fee. This also applies to withdraws. Minimum tip amount is 0.1 JBS Usage:
tipbot deposit Returns users deposit address
tipbot balance Returns users current balance
tipbot tip <@user> <amount> Tips @user amount JBS
e.g: tipbot tip @xocel 100
tipbot withdraw <address> <amount> Withdraw amount to address
e.g: tipbot withdraw JZp9893FMmrm1681bDuJBU7c6w11kyEY7D 100
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Julian,
mandatory?
Technically, yes. Most have upgraded. You are highly encouraged to upgrade ASAP as this release takes up less resources too. The exchanges Bittrex and Bleutrade have also upgraded. Cryptsy is unfortunately running 1.7. In this change in the 1.8 release: commit 9dd0268580d3c73ccc77ae512d7203bb9b1fc6ff
Date: Sun Sep 13 22:55:21 2015 -1000
Change Proof of Stake rewards to change based on nTime as opposed to block count.
The next reward change kicks in at exactly 2 years since launch: if (pindexBest->nTime >= 1472688000) // Thu, 01 Sep 2016 00:00:00 UTC
Previously it kicked in based on block count: if (nHeight >= YEARLY_BLOCKCOUNT * 2)
Where YEARLY_BLOCKCOUNT was set to: static const int64_t YEARLY_BLOCKCOUNT = 525600; // 60 * 24 * 365
So you definitely MUST upgrade prior to block 1,051,200. Currently at block 606,987. The next update will most likely be a hard fork so that will be a mandatory update but I'll give ample time to upgrade that. |
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Jumbucks New Wallet Version 1.9 - Please upgradeHi all, A new wallet version 1.9 has been released for Jumbucks. This release is a clean upgrade for users currently running version 1.8 of the wallet. If you are upgrading from version 1.7 or prior, please follow the steps in the release notes of version 1.8 as the data directory was renamed in that release. New users may install the wallet as is. Highlights of this release include greatly improved wallet and staking performance. This release is an incremental step to being a very solid cryptocurrency. It has some staking changes which improves wallet performance and the network for the long term future. The next update will likely change the block times to something longer, for example up from 60 seconds to 100 seconds and change the proof of stake algorithm to SHA256. This would be a version 2.0 release as it requires a hard fork. We remind you that the primary communications channel is Jumbucks Slack. Thank you for your support! Download links:Github: https://github.com/jyap808/jumbucks/releases/tag/v1.9Changes:- Removed the unused encrypted messaging feature. This saves memory and network resources.
- Modify Proof of Stake rewards to change based on nTime as opposed to block count. This makes the switchover at year 2 and year 10 exact in time.
- Increase the number of nodes required (from 3 to 5) to be connected for staking for better broadcasting of blocks.
- Rebalance staking network. More inputs, less resources, better stake payouts. This also results in a more stable wallet taking up less resources.
- Only sign blocks based on current time as slow systems can unintentionally lag behind. This helps to reduce network orphaned blocks.
- RPC command getwalletinfo - Modify to add more details
- RPC command dumpbootstrap - New command
Signed version tag:This version has been tagged and signed as v1.9 in Git. Verify it using my GPG public key on https://keybase.io/jyap. $ object 066fe329186ef86f2d22df49b288fffa6620f753
type commit
tag v1.9
tagger Julian Yap <> 1442281566 -1000
Signed 1.9 tag
gpg: Signature made Mon Sep 14 15:46:06 2015 HST using RSA key ID 7F661F0A
gpg: Good signature from "Julian Yap <>"
gpg: aka "keybase.io/jyap <>"
Thanks, Julian
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Thank you for adding Jumbucks. Great working with you!
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Jumbucks Fantasy Football The 1st Annual Jumbucks Fantasy Football season is up and running! Twelve players from a variety of interests and backgrounds have signed up and the smack talk has already begun. For some of the players this represents their first taste of cryptocurrency, while others are are established members of the Jumbucks community taking their first punt at fantasy sports. We look forward to seeing both groups smack talk throughout the season, and anticipate several new Jumbucks and cryptocurrency fans by the time the competition completes. The league buy in was 20 USD worth of $JBS. Five members of the Jumbucks community also donated to increase the prize pool, so many thanks to Julian, Xocel, Sicarious, Saintgermaine, Bittrex Bill and Takeshi for their donations and support of Jumbucks. Calculating the player buy-ins, plus the donations, the total prize pool is up to 10,000 $JBS! This prize pool will be held and staked in a wallet managed by the Jumbucks devs until the league finishes. The league’s 1st place winner will receive 65% of the pool in addition to the stake, 2nd place will receive 25%, and 3rd place will receive 10%. The league will kick off with a draft on Saturday September 5th and will run all the way through week 16 of the NFL season. If you want to check out the league channel and talk some smack with the league players, head over to http://slack.getjumbucks.com/ and join #jbs-fantasy-football. While all twelve spots in the league are already filled, you are invited to reserve a position in the event that one of the current players has to drop out. If enough additional interest is raised then there could be an opportunity to create a second league. We look forward to a fun season, and invite you to drop in the Jumbucks Slack channel to welcome all the newcomers to Jumbucks. Jumbucks is a Fair Launch cryptocurrency which launched in September 2014 without an IPO and with zero premine. Jumbucks currently runs as 100% Proof of Stake, and is currently traded on Bittrex, Bleutrade and Cryptsy. Find out more information at GetJumbucks.com.
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Nice work. I see you have a pending pull request for Jumbucks  |
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Jumbucks Slack - Open to all!Cultivating a strong community is very important for a coin but something that is often neglected or overlooked by its creators. In contrast, Jumbucks cryptocurrency was originally built around an IRC community called #coinmarkets, and since then has focused upon growing and strengthening the larger cryptocurrency community. Technology surrounding the cryptocurrency scene is in a constant state of flux, so it's imperative that a coin have the ability to adapt and change with the times. Jumbucks has long had a dedicated IRC channel on Freenode but oftentimes this medium of communication can be limiting. There is a learning curve involved with IRC that is not inviting for newcomers, and they are also at risk from scammers who lurk in channels to prey on new users. Because of this, we have ported the custom existing commands from the Jumbucks IRC channel into Jumbucks Slack. As time progresses, we will be improving the Jumbucks Slack experience with custom bots, new functionality, and other interactive elements. My vision for Jumbucks is that it will always be a welcoming community where both oldtimers and people new to cryptocurrencies can feel welcome. Jumbucks Slack will always be open to everyone and there are no requirements for members to be a Jumbucks supporter or holder. Joining bonus and referral programThat being said, we want to take this opportunity to welcome each newcomer to our growing community with a gift of 20 $JBS. Also, you can earn 5 additionally $JBS for every person you refer to the Slack channel, to a maximum of 10 referals. (This program is subject to change.) To claim your free $JBS, please join the #referrals channel in Jumbucks Slack and mention your claim--payouts will be done manually. We hope you can all join us in Jumbucks Slack! Jumbucks is a Fair Launch cryptocurrency which launched in September 2014 without an IPO and with zero premine. Jumbucks currently runs as 100% Proof of Stake, and is currently traded on Bittrex and Cryptsy. Find out more information at GetJumbucks.com.
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Jumbucks New Wallet Version 1.8 - Maintenance update with directory name changesHi all, A new wallet version 1.8 has been released for Jumbucks. This is a relatively minor update but does require some interaction from the user for upgrading as the data directory has been renamed. For existing users, please pay attention to the Upgrade steps below. New users may install the wallet as is. For Windows users this update also includes standalone executable wallets for 32-bit and 64-bit systems. Other improvements include new RPC commands and faster start up times. Upgrade steps:The data directory and configuration file has been renamed. This change was necessary to fully deprecate the old CoinmarketsCoin name to switch over to Jumbucks. - Backup your wallet.dat file
- Shut down the current version 1.7 wallet
- Rename the data directory the the new name described below. Rename configuration file (if you manually created one) from coinmarketscoin.conf to jumbucks.conf
- Install the new version
- Start up the new version 1.8 wallet and verify everything works
- Windows users MAY need to follow the step of deleting everything in their data directory except for their wallet.dat file since the wallet is in a new executable format. This would require a full resync of the blockchain and steps to sync from a bootstrap.dat file are included below.
OLD data directory Windows < Vista: C:\Documents and Settings\Username\Application Data\CoinmarketsCoin
Windows >= Vista: C:\Users\Username\AppData\Roaming\CoinmarketsCoin
Mac: ~/Library/Application Support/CoinmarketsCoin
Unix: ~/.coinmarketscoin
NEW data directory Windows < Vista: C:\Documents and Settings\Username\Application Data\Jumbucks
Windows >= Vista: C:\Users\Username\AppData\Roaming\Jumbucks
Mac: ~/Library/Application Support/Jumbucks
Unix: ~/.jumbucks
Github: https://github.com/jyap808/jumbucks/releases/tag/v1.8Changes:- Updated some QT wallet images such as the splash screen
- Added getwalletinfo RPC call
- RPC command liststealthaddresses - Multiple address fix
- RPC command liststealthaddresses - Results reformatted to be consistent with rest of RPC calls
- RPC command sendtoaddress - Call sendtostealthaddress if passed a stealth address
- RPC command sendtoaddress & sendtostealthaddress - Reordered params moving narration to end
- OpenSSL DER fix to allow for latest versions of OpenSSL
- Decrease the default number of blocks to check at startup to 500
- Modify DNS seeds to use getjumbucks.com domain and deprecate old coinmarketscoin.com domain
- Remove redundant stake modifier checkpoints checks
- Reduce nStakeCombineThreshold to 500 for smoother network staking
Bootstrap.dat file:The 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. The current Bootstrap file is at block 414,811 (May 25, 2015). 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.
Signed version tag:This version has been tagged and signed as v1.8 in Git. Verify it using my GPG public key on https://keybase.io/jyap. $ git tag -v v1.8
object 2a187cd3379512b1b1c3228ad80bab4a9ce7d638
type commit
tag v1.8
tagger Julian Yap <> 1432435937 -1000
Signed 1.8 tag
gpg: Signature made Sat May 23 16:52:17 2015 HST using RSA key ID 7F661F0A
gpg: Good signature from "Julian Yap <>"
gpg: aka "keybase.io/jyap <>"
Thanks, Julian
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https://twitter.com/jbsannbotBitcointalk new coin announcements Twitter bot for the Jumbucks and crypto community. Some logic is involved to try and filter out spam.. so may not Tweet all launches.
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lol youll never get any attention this way...
Jumbucks @getjumbucks 35m35 minutes ago
Hi @ShapeShift_io. Please consider adding #Jumbucks $JBS. Stable Proof of Stake cryptocurrency around for almost 8 months. Thanks!
Well we've been discussing via email as well. presume focus is on volume, approaching that way without out it makes no sense try more community building first with way out of ordinary methods (thinking) you can't get something without giving something sometimes i guess - or am i just stupid It's hard to say what their criteria is (the didn't say specifics) considering a particular coin on their service has less than $10 worth of volume. But Shapeshift did mention that Jumbucks is up for consideration. - Julian |
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Syncing the wallet from 0 is taking a long time. Several days in I'm still barely half way there. If there's a way to speed it up please advise. Thanks
Hi. Sync shouldn't take that long since there are lots of nodes. You can try the bootstrap.dat method. That should be much faster. Details here: https://bitcointalk.org/index.php?topic=865169.msg10779084#msg10779084Thanks for your support! |
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