Blockchain always corrupted - Bitcoin Forum

Corrupted blockchain data: is there a way to fix it?

Short version:
The official Bitcoin Core (bitcoin-qt.exe) crashes with a window as such:
MinGW Runtime Assertion
Assertion failed!
Program: ...\bitcoin-qt.exe File: validation.cpp, Line 1751
Expression: hashPrev == view.GetBestBlock()
It appears when the main window shows "Loading wallet...".
Long version:
I built the executables from the latest source code from bitcoin GitHub repository. I had to use "--disable-wallet" because of Berkeley DB version issue and "--with-incompatible-bdb" didn't work. (There were all sorts of errors. I googled a lot and every attempt reached a dead-end. "--disable-wallet" failed at the beginning, but somehow it became working lately.) The generated bitcoin-qt.exe ran OK. It's of version 0.14.99.blah.blah. It stuck on "Load block index..." and never moved on. (Not sure if it's normal.)
Then there was an internet glitch. The network was down. The program crashed. After that, no version of the executable could run without crashes.
Is it that the blockchain data is corrupted? Is there a way to fix it?
submitted by exab to Bitcoin [link] [comments]

Trying to salvage some coins from 2013. Core (bitcoin-qt.exe v0.8.1-beta on Windows 8.1) is taking weeks to DL the blockchain as expected but keeps crashing now. Can I upgrade to a newer version without losing what I've gotten already (about 75% complete)?

Currently there are 134305 blocks remaining. When I start it up it works pretty smoothly for a while but then slows down. I leave it running while I'm gone but the last several days when I've come back it has crashed and gives me an I/O error, and I have to hit OK then start it back up. It does appear to be further along when I start it back up but not by a whole lot. So this has really slowed my progress. It's reindexed about 75% though, and so I don't want to start over from the beginning.
The drive it is on has ~400gb of free space so that's not the issue. I have 8gb of memory, and the task manager says bitcoin is taking up about 500mb, but it's using 60-85% of my cpu at a time.
If I download a newer version of core, I can just copy/paste the old wallet.dat file, right? But wouldn't it have to start downloading the entire blockchain again from the beginning? If so, is there any quicker method?
While typing this, it crashed twice. It only runs for about 10 minutes.
The version I have doesn't have any settings I can change. I read that there's a db size limit you can change in later versions that could help. This one does have a "debug window" with a command line console but I don't really know what to do with it. Here is a list of available commands: 
addmultisigaddress <'["key","key"]'> [account]
addnode
backupwallet
createmultisig <'["key","key"]'>
createrawtransaction [{"txid":txid,"vout":n},...] {address:amount,...}
decoderawtransaction
dumpprivkey
encryptwallet
getaccount
getaccountaddress
getaddednodeinfo [node]
getaddressesbyaccount
getbalance [account] [minconf=1]
getblock
getblockcount
getblockhash
getblocktemplate [params]
getconnectioncount
getdifficulty
getgenerate
gethashespersec
getinfo
getmininginfo
getnewaddress [account]
getpeerinfo
getrawmempool
getrawtransaction [verbose=0]
getreceivedbyaccount [minconf=1]
getreceivedbyaddress [minconf=1]
gettransaction
gettxout [includemempool=true]
gettxoutsetinfo
getwork [data]
help [command]
importprivkey [label] [rescan=true]
keypoolrefill
listaccounts [minconf=1]
listaddressgroupings
listlockunspent
listreceivedbyaccount [minconf=1] [includeempty=false]
listreceivedbyaddress [minconf=1] [includeempty=false]
listsinceblock [blockhash] [target-confirmations]
listtransactions [account] [count=10] [from=0]
listunspent [minconf=1] [maxconf=9999999] ["address",...]
lockunspent unlock? [array-of-Objects]
move [minconf=1] [comment]
sendfrom [minconf=1] [comment] [comment-to]
sendmany {address:amount,...} [minconf=1] [comment]
sendrawtransaction
sendtoaddress [comment] [comment-to]
setaccount
setgenerate [genproclimit]
settxfee
signmessage
signrawtransaction [{"txid":txid,"vout":n,"scriptPubKey":hex,"redeemScript":hex},...] [,...] [sighashtype="ALL"]
stop
submitblock [optional-params-obj]
validateaddress
verifymessage

submitted by closer_to_the_flame to Bitcoin [link] [comments]

Trying to salvage some coins from 2013. Core (bitcoin-qt.exe v0.8.1-beta on Windows 8.1) is taking weeks to DL the blockchain as expected but keeps crashing now. Can I upgrade to a newer version without losing what I've gotten already (about 75% complete)? /r/Bitcoin

Trying to salvage some coins from 2013. Core (bitcoin-qt.exe v0.8.1-beta on Windows 8.1) is taking weeks to DL the blockchain as expected but keeps crashing now. Can I upgrade to a newer version without losing what I've gotten already (about 75% complete)? /Bitcoin submitted by ABitcoinAllBot to BitcoinAll [link] [comments]

Dogecoin 1.5.1 Released - Upgrade Now!

We’re happy to announce the release of Dogecoin version 1.5.1!
This release incorporates a range of updates from community contributors, some much needed bug fixes, plus some cool treats brought down-stream from the recent Bitcoin 0.9 release candidate.
Thanks to everyone who helped make this release possible, the entire community appreciates it. We recommend all users update to the latest version and please report any issues you may encounter. As always, backup your wallet.dat file before updating (just to be safe).
Downloads: Windows Installer Windows Archive Mac OS X App
Release highlights: - Switched to Boost 1.55 to fix network connectivity issues on Windows - Removal of reliance on IRC for discovering nodes - Support for URL protocol, eg. dogecoin:addr?amount=xxx&(see Bitcoin’s implementation) - Ability to automatically look up transactions on Dogechain from your client - Working Windows setup script and installer - Opt-in debug logging via -debuglog (to save disk space and stop constant writing) - Fixed Mac Splashscreen’s greedy desktop behavior - Reimplemented testnet, fixing RPC crash due to no genesis block being present - Allow user to load any wallet from data directory specified using -wallet=mywallet.dat - Updated to LevelDB 1.15 to address blockchain database corruption issues - Allow user to send change only to specified address(es) using -change= (one -change parameter per address) - Fixed RPC difficulty look up
Troubleshooting
If anyone experiences issues, delete all 1.4 data (apart from your backed up wallet.dat file) and do a fresh 1.5.1 install.
Enjoy!
submitted by Laika1954 to dogecoin [link] [comments]

Help, finding a lost Bitcoin!

A few years back I bought a bitcoin, when they were at peak value pretty much. I paid about a thousand dollars for the coin, shortly after the value crashed and I tried to forget the whole thing.
Now the value is coming back, and so I wanted to check up on my coin, I opened bitcoin-qt.exe and my coin is nowhere to be found, I know it is on my PC somewhere, but I don't remember the information - I do remember the password, but I don't know what name I would search for on my disk to find and open the wallet.
The app is still downloading its 76 weeks behind now, but it is also telling me it is out of date, I don't want to update the app before I find my wallet.
Since I bought the coin, I have installed two new hard disks, when I bought it my disk F: was my disk C: so could the program be checking C: for a wallet, but my wallet is hiding in the F: disk somewhere? I did open the bitcoin app from the drive on F:
TLDR: Bought a bitcoin a few years back, forgot where I saved it, can remember the password I created for the wallet, but not the wallet name, or number or any ID. How would I go about finding and recovering the coin?
submitted by shimshimmaShanghai to btc [link] [comments]

ANN - RENESIS - LTME (Long Term Mining Evolution)

ANN - RENESIS - LTME (Long Term Mining Evolution)
https://preview.redd.it/wulcw7lgbhb11.png?width=500&format=png&auto=webp&s=c3aca3a98e0b699d88e99acee4a5dc236c8b39e0
LTME ( Long Term Mining Evolution) With ASIC Resistance Promise hav0k, The Renesis Core

Renesis Specifications:

Algorithm: Renesis Ticker: RESS Whitepaper v1: https://github.com/renesisgroup/whitepapeblob/masteRENESIS-paper.pdf Block Time: 2 minutes Block Reward: Variable. Refer to whitepaper for reward structure. Halving: Yes Doubling: Yes Mined Confirmations PoW/PoS : 60 TX Confirmations: 10 Minimum RX confirmations to forward: 1 Total Coin Supply: 350M for Proof of Work PoS Cap: No PoS Stake Reward: 10% per year Pre-mine: Yes ( First 100 Blocks mined on low difficulty with CPUMiner) Bounties Available: Yes - From Premine Rewards Available for Community Developers: Yes, from Premine CPUMiner Available: Yes - Windows binary & source. NVIDIA GPUMiner Available: Yes ( Reward for fair release of GPUMiner is paid! 50,000 RESS ) AMD GPUMiner Available: No ( Reward for fair release of GPUMiner is > 12,000 RESS ) Renesis New Logo Design Competition: Yes ( Reward of 2000 RESS ) Renesis QT Wallet Theming Competition: Yes ( Reward of 5000 RESS ) Renesis V2 Static Website Design Competition: Yes ( Reward of 7000 RESS ) Renesis public Pool addition reward: Yes (10000 RESS) - First 3 Pools. Renesis Node Hosting: Yes ( Reward of 1000 RESS offered for 1 month of hosting ) Translation Bounties: Yes ( Reward of 500 RESS per translation posted ) Social Media Bounties: Yes ( Connect with us on our channels for information ) ICO: No - Bitcoin Talk ANN for everyone to mine starting 101 block Masternodes: Planned MainNet P2P port: 9775 MainNet RPC port: 9774 TestNet P2P port: 19775 TestNet RPC port: 19774
Renesis Development Team : hav0k - 2 developers Group : The Renesis Group ( Visit www.renesis.io for profiles ) - 7 members Web Site: http://www.renesis.io Block Explorers: http://tx.renesis.io - https://protopool.net/exploreRESS Reddit: https://www.reddit.com/Renesis/ Connections: Discord, Telegram, Slack ( Visit www.renesis.io to connect ) Will have web wallet: No - We believe coins should be safe in your wallets not online. Pools: To be announced after announcement. Exchanges: To be announced.

Pools:

https://cryptopool.party 10000 RESS Reward TX : http://tx.renesis.io/address/RVMNvHD3DFH1CZ9JVijFxiZgKcPLBpteYh
https://protopool.net 10000 RESS Reward TX: http://tx.renesis.io/address/RATQNUpMH7puoByrkBBUWiBVJowno6bGPz
http://www.tera.tn/ 10000 RESS Reward TX: http://tx.renesis.io/address/RFUkDC5dyRQZhH3GkrAhnAUNNQ2tZbTt7w

Nodes:

addnode node1.renesis.io addnode node2.renesis.io addnode node3.renesis.io addnode node4.renesis.io addnode node5.renesis.io ( Node by CryptoHobo. 1K RESS every month . TXID : 1e7a332788bceb23438b783dac172c853804d51443f43a1d68b378447981059f - 22 July 2018 addnode i.crashed.online addnode he.crashed.online addnode it.crashed.online addnode she.crashed.online addnode renesisckko455xx.onion add ( Tor Node )
Terms & Conditions for GPUMiner Releases : Developers must release the mining software + source after brief testing to Renesis Group to claim their reward. The group will immediately upload the GPUMiner with sources on github after mining 2 test blocks and will provide proof to community. If GPUMiner software is released directly to the community then it would fair but there will be no reward for software developers.

Mining:

At the time of announcement, you can mine solo until pools become available. Download the CPUMiner binary or source from github with a wallet https://github.com/renesisgroup/cpuminer-release. Place the renesis.conf in your wallet data directory and (re) start wallet. Run start.bat file inside CPUMiner bin folder to mine Renesis. You can edit the start.bat file to edit the number of threads for mining. If you wish to mine on a pool then use the poolmine.bat file.
Note: Please be advised that the cpuminer.exe can show up as a virus on Windows just like almost all mining software. You can be assured it is not and is labelled as coin miner, CpuMiner (PUA) or malware. Refer to virustotal report here https://www.virustotal.com/#/file/1c90ca293dc016f0d8663f7bab55b5def8f484c21b3dac3dae6f81d0166cc99e/detection . You can safely verify your Claymore and EWBF CUDA miners at virustotal and they will give similar results. If you feel that it has a virus then please do not mine. Virustotal scan for Windows wallet is : https://www.virustotal.com/#/file/4cc5d6977566fc7e254744626d0783b1fc2d1aab15d72a5137c99ef0e91eee46/detection .For questions related to GPUMiner releases, please ask fellow miners or their respective developers when their releases become available for download.
UPDATE: CCMINER Download : https://github.com/renesisgroup/ccminer-renesis Reward of 50000 RESS paid to user A1 on Discord : http://tx.renesis.io/address/RVmFpemzMtbjhG16bjQTGEWv3sTgRVuzWm
Special thanks to mrM4D for his guidelines on CPUMiner build. Cheers to ocminer, mrM4D and Epsylon3 Greets to: SCRIV, RavenCoin for their game changing innovations and ASIC resistance commitments.

Roadmap:

Phase 1
Renesis Release Development - done CPUMiner Development - done Generate the premine - done Announcement - Underway Community Developers - 3 required and backed by funding from premine. Update: 1st Dev joined the dev team GPUMiners for AMD - Awaited and backed by rewards for fair release by developers. Masternodes Solution - TBA by developers and community consensus and backed by rewards from premine. ASIC Survey - Planned Rensis Hash Enhancement - Planned. TBA under phase 2 or after ASIC Survey Renesis Holdings Fund - Planned
Phase 2 - Next
Good things coming here =) Real use case 1 - Planned Real use case 2 - Planned To be announced after completion of Phase 1
Phase 3 - Planned
Online Gaming - Planned
Phase 4 - Planned
To be announced after completion of Phase 3
submitted by dev_hav0k to Renesis [link] [comments]

Setting up solo mining just targeting USB erupters? PC/Mac?

I am having trouble trying to get solo mining started on either my PC or Mac. I have a PC set up that is using three 7950s that are mining Litecoins. I'd like to have my 2 USB erupters solo mining Bitcoins for fun on the same system. I have the drivers installed for the USB miners and my system recognizes them.
I am starting Bitcoin-QT as -server
My bitcoin.conf looks like this: listen=1 server=1 rpcuser=user rpcpassword=pass
I set up a BFG .bat like this: bfgminer.exe -o 127.0.0.1:8332 -O -u user -p pass
When I launch that, BFG just crashes. I have also tried it with CGminer and that crashes also. I'd like to keep CGminer on the cards Litecoin mining and use BFG for the USB miners.
How do I get BFG to work just with the USBs? Also, do I need to input a Bitcoin address somewhere so if I did solve something I get the payout?
Sometimes, I do more work on my Mac and am also trying to set up the USBs to mine on a Mac using Diablo miner. Will that work the same way as the PC setup once we get it figured out?
Thanks for any help.
submitted by PoisonCoyote to BitcoinMining [link] [comments]

[HELP] bitcoin-qt.exe has stopped working

Hi guys, I'm fairly new to Bitcoins and I'm already scared that I've lost my wallet.
I used bitcoin-qt.exe to create a new one, let it sync, then transferred some funds over to it. Since then, every time I try to run it, it just crashes instantly. I'm running Windows 8.1 and neither the 32-bit nor 64-bit versions of bitcoin-qt work at all.
If I debug with Visual Studio 2012: it displays the following error:
Unhandled exception at 0x00B906CA in bitcoin-qt.exe: 0xC0000005: Access violation reading location 0x00000004.
I tried using Bitcoin Armory and that won't work either.
Is there any alternative Bitcoin client or some method I can use to recover my wallet and its bitcoins? I am desperate for help.
Thank you so much.
Edit:
Apparently version 0.9.3 works fine. I'm going to see if I can recover my wallet with this version.
Edit:
I uninstalled absolutely everything related to Bitcoin, deleted everything except my wallet, torrented bootstrap.dat, installed Bitcoin 0.10.0, and it works now, but it won't seem to recognize my wallet backup, even running with -rescan. I'll try some more. Thanks for the help though, you guys.
submitted by Huskehn to Bitcoin [link] [comments]

Bitcoind.exe in Armory crashes

Hi All,
Running Windows 8 64-bit, Armory v0.9.32-beta-85959b20d8, Core Bitcoin v0.10.2.
Armory loads up just fine, and using Process Explorer (Sysinternals tool), I am able to see ArmoryQT.exe as the parent thread with bitcoind.exe as one child thread (which has a conhost.exe child thread) and another child thread for guardian.exe (which also has a conhost.exe child thread) This is how it looks:
Now, as soon as I load Armory, the wallet consistency check passes and then it's stuck in "Initializing Bitcoin Engine" with no progress at all (just the rotating grey/green wheel) - then about 15 minutes later, I'll notice that the bitcoind.exe process and its child disappear. Guardian.exe is still running though.
Now, when I disabled Armory from controlling bitcoin, I can load Bitcoin-Qt.exe no problems, it syncs with the blockchain no issues, and Armory will phase in and out of being connected. Which is totally weird....like the rpc connection somehow gets lost and reconnects at random times. But, even when Armory shows it's connected, and Bitcoin-Qt.exe shows that's it's fully synced with the blockchain, it doesn't update any transaction info in Armory at all. Now, I can see in the blockchain that my last few transactions already have 38 confirmations, but Armory still shows that there are 0 confirmations and that the transaction hasn't hit the blockchain yet. Obviously this isn't true.
So, I turn to y'all for some help and guidance....I've scoured their forums, and I've tried all the suggestions, so I'm turning now to the trusted reddit community for some insight and help.
Any ideas?! I mean, I could probably just backup my wallet, uninstall both armory and bitcoin, then do a clean install, then wait a month for the blockchain to sync, but I'd prefer to have to avoid this if that's AT ALL possible.
Also, not sure if this is relevant, but even though the blockchain is synced, shortly before bitcoind.exe goes out of commission (only when run through Armory, bitcoin never crashes when loaded separately) the cpu % for that process spikes to about 45-70% for a few minutes, which sounds like it's processing headers and what not, and then just poops out.
I have a quad-core AMD A6-3600 - not the BEST but not the worst either....
Ok, help....please....
EDIT: formatting
submitted by shayaknyc to Bitcoin [link] [comments]

Ziftrcoin Core - Runaway Exception

I've installed the client and it works great, until I exit the program. Upon restart, it crashes immediately, giving me the following error:
"Runaway Exception" A fatal error occurred. Bitcoin can no longer continue safely and will quit.
EXCEPTION: N5boost12interprocess22interprocess_exceptionEAccess is denied. C:\Program Files\Ziftrcoin\ziftrcoin-qt.exe in Runaway exception
Windows 8.1 64 bit, FYI.
I've tried reinstalling, changing the read-only flag, and reinstalling to a different location, all with no luck. I always get this message by the second time i run the program.
Any suggestions?
submitted by coast_transplant to ziftrCOIN [link] [comments]

Bitcoind.exe has stopped working when I start Armory.

I wanted to try out Armory, since it supposed to be super secure and all. Installed it, took all the security steps, made and test the back-up.
Now when I start Armory, windows immediatly reports Bitcoind.exe has stopped working. Armory will stay offline.
I have already pointed Armory to my correct Blockchain data and Bitcoin QT folder, since I dont save them in the default location. Also skipping the online check does not make any difference.
When rebooting my computer, sometimes Armory will sync for a few minutes and then Bitcoind.exe crashes and armory goes back to Offline :\
Anyone know what I can try to make this work ?
Thanks
submitted by b44rt to Bitcoin [link] [comments]

Help me!! Assertion Failed. bitcoin-qt

guys my bitcoin wallet suddenly appears with this error.
Error loading block database. Do you want to rebuild the block database now ?
clicked "ok"
Assertion Failed! program: C:/programfiles/bitcoin/bitcoin-qt.exe File:db/version_set.cc Line:715
expression:dummyversions.next==&dummy_versions
for information on how your prgram can cause an assertion failure,see the visual c++ documentation
after this i clicked try again but it crashes after that.
please ggive me some advice on where to search or just give me some links
submitted by Lazboarder to Bitcoin [link] [comments]

I mined this last year with 2 computers over at least a month. How do I get the bitcoin value I earned?

http://eligius.st/~wizkid057/newstats/userstats.php/17td8F8PXVnBboTVRtq4Er3LYQj92sS9Le
I mined this last year with 2 computers over at least a month. Along with this stats page, I used the bitcoin-qt software in Windows to check my balance. I had 0.3 bitcoins due to 2 payouts from Eligius' pool. Now, after not having looked at this for over a year, I tried loading bitcoin-qt.exe and it crashed when trying to update my wallet and it said I have 0.00 BTC. I updated that program and now it shows a different address. How do I get my money back?
submitted by AlexFolland to Bitcoin [link] [comments]

BitcoinQT keeps failing to download the blockchain in new ways.

I bought a bitcoin early last year and used bitcoinQT just fine. Then a few months ago I rebuilt my computer and added an SSD, so I backed up the wallet and reformated. Since I didn't plan to sell anytime soon I didn't really need to reinstall right away. A few weeks ago I decided to reinstall QT, but I would need to have the chain on the HDD to preserve space. I used the -datadir parameter and got 9gb into the chain before it stopped downloading blocks and showed a banner in the program that said "Warning: Displayed transactions may not be correct! You may need to upgrade, or other nodes may need to upgrade." This was with version 0.8.5. The holidays came and I got side tracked until now. I got back to it and the problem was still there, but I saw 0.8.6 was out, so I deleted the chain and started over. Now I've gotten 10gb into the block and suddenly while downloading QT crashed with a message "System error:database corrupted." I opened QT again and it went back to work and got another 1 hour into the download before it happened again and now when I try to open the program it errors every time with this message. Though sometimes when I double click the shortcut, rather than crashing with this error it will open but ignore the -datadir, starting to download the chain from the beginning and putting it in my user folder on the SSD. Any ideas? Thanks
The directories Im using are
C:\Program Files (x86)\BitcoinQT for the program and
G:\Programs\Bitcoin\QT-Files for the blockchain
The target Im using in the shortcut is:
"C:\Program Files (x86)\BitcoinQT\bitcoin-qt.exe" -datadir=G:\Programs\Bitcoin\QT-Files\Bitcoin
submitted by Bulldogg658 to BitcoinWallet [link] [comments]

Bitcoin-QT 0.9 disponível para download

The Core Developers of Bitcoin released the 0.9.0 FINAL of Bitcoin Core (aka Bitcoin QT).
DOWNLOAD:
This is a Final Version, but its the same as 0.9.0rc3
Sources: https://github.com/bitcoin/bitcoin/releases http://sourceforge.net/projects/bitcoin/files/Bitcoin/bitcoin-0.9.0/ https://bitcoin.org/bin/0.9.0/README.txt
Bitcoin Core version 0.9.0 is now available from:
https://bitcoin.org/bin/0.9.0/
This is a release candidate for a new major version. A major version brings both new features and bug fixes.
Please report bugs using the issue tracker at github:
https://github.com/bitcoin/bitcoin/issues

How to Upgrade

If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), uninstall all earlier versions of Bitcoin, then run the installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) or bitcoind/bitcoin-qt (on Linux).
If you are upgrading from version 0.7.2 or earlier, the first time you run 0.9.0 your blockchain files will be re-indexed, which will take anywhere from 30 minutes to several hours, depending on the speed of your machine.
On Windows, do not forget to uninstall all earlier versions of the Bitcoin client first, especially if you are switching to the 64-bit version.

Windows 64-bit installer

New in 0.9.0 is the Windows 64-bit version of the client. There have been frequent reports of users running out of virtual memory on 32-bit systems during the initial sync. Because of this it is recommended to install the 64-bit version if your system supports it.
NOTE: Release candidate 2 Windows binaries are not code-signed; use PGP and the SHA256SUMS.asc file to make sure your binaries are correct. In the final 0.9.0 release, Windows setup.exe binaries will be code-signed.

OSX 10.5 / 32-bit no longer supported

0.9.0 drops support for older Macs. The minimum requirements are now: * A 64-bit-capable CPU (see http://support.apple.com/kb/ht3696); * Mac OS 10.6 or later (see https://support.apple.com/kb/ht1633).

Downgrading warnings

The 'chainstate' for this release is not always compatible with previous releases, so if you run 0.9 and then decide to switch back to a 0.8.x release you might get a blockchain validation error when starting the old release (due to 'pruned outputs' being omitted from the index of unspent transaction outputs).
Running the old release with the -reindex option will rebuild the chainstate data structures and correct the problem.
Also, the first time you run a 0.8.x release on a 0.9 wallet it will rescan the blockchain for missing spent coins, which will take a long time (tens of minutes on a typical machine).

Rebranding to Bitcoin Core

To reduce confusion between Bitcoin-the-network and Bitcoin-the-software we have renamed the reference client to Bitcoin Core.

Autotools build system

For 0.9.0 we switched to an autotools-based build system instead of individual (q)makefiles.
Using the standard "./autogen.sh; ./configure; make" to build Bitcoin-Qt and bitcoind makes it easier for experienced open source developers to contribute to the project.
Be sure to check doc/build-*.md for your platform before building from source.

Bitcoin-cli

Another change in the 0.9 release is moving away from the bitcoind executable functioning both as a server and as a RPC client. The RPC client functionality ("tell the running bitcoin daemon to do THIS") was split into a separate executable, 'bitcoin-cli'. The RPC client code will eventually be removed from bitcoind, but will be kept for backwards compatibility for a release or two.

walletpassphrase RPC

The behavior of the walletpassphrase RPC when the wallet is already unlocked has changed between 0.8 and 0.9.
The 0.8 behavior of walletpassphrase is to fail when the wallet is already unlocked:
> walletpassphrase 1000 walletunlocktime = now + 1000 > walletpassphrase 10 Error: Wallet is already unlocked (old unlock time stays) 
The new behavior of walletpassphrase is to set a new unlock time overriding the old one:
> walletpassphrase 1000 walletunlocktime = now + 1000 > walletpassphrase 10 walletunlocktime = now + 10 (overriding the old unlock time) 

Transaction malleability-related fixes

This release contains a few fixes for transaction ID (TXID) malleability issues:

Transaction Fees

This release drops the default fee required to relay transactions across the network and for miners to consider the transaction in their blocks to 0.01mBTC per kilobyte.
Note that getting a transaction relayed across the network does NOT guarantee that the transaction will be accepted by a miner; by default, miners fill their blocks with 50 kilobytes of high-priority transactions, and then with 700 kilobytes of the highest-fee-per-kilobyte transactions.
The minimum relay/mining fee-per-kilobyte may be changed with the minrelaytxfee option. Note that previous releases incorrectly used the mintxfee setting to determine which low-priority transactions should be considered for inclusion in blocks.
The wallet code still uses a default fee for low-priority transactions of 0.1mBTC per kilobyte. During periods of heavy transaction volume, even this fee may not be enough to get transactions confirmed quickly; the mintxfee option may be used to override the default.

0.9.0 Release notes

RPC:
Command-line options:
Block-chain handling and storage:
Wallet:
Mining:
Protocol and network:
Validation:
Build system:
GUI:
submitted by allex2501 to BrasilBitcoin [link] [comments]

Bitcoin & Cryptocurrency Market Price is Crashing, Why ... How to Recover & Reload a BITCOIN WALLET 0.8.1-beta Win 7 Baidu PC Faster crash Fix - YouTube What if Bitcoin Crashes? - YouTube BITCOIN : ENFIN LE CRASH

bitcoin-qt.exe -datadir=W:\bitcoin\data -txindex Fine, it downloads all blockchain for the past 6 years, but this takes at least three days. Now three times, with only about 14 weeks left to download, my Windows Computer blue screens. It only blue screens when bitcoin-qt.exe is running. NEVER any other times. After a reboot, the block chain is corrupted and I have to start over again. WTF? How ... When I try to run bitcoin-qt it hard crashes when I have "disablewallet" in bitcoin.conf. When I replace it with "disablewallet=true", it doesn't crash, but I still see my wallet and transactions. When I replace it with "disablewallet=1"... Compiling bitcoin-qt error: ld.exe: cannot find -lsecp256k1. I have followed the guide "Building headless Bitcoin and Bitcoin-qt on Windows" but with a more recent altcoin source code to test. The compilation stop on ld.exe: cannot find -lsecp256k1 Is one ... wallet altcoin bitcoin-qt-setup. asked Mar 13 '18 at 10:16. Boody. 31 2 2 bronze badges. 0. votes. 2answers 51 views txtnindex=1 but ... The official Bitcoin Core (bitcoin-qt.exe) crashes with a window as such: MinGW Runtime Assertion. Assertion failed! Program: ...\bitcoin-qt.exe File: validation.cpp, Line 1751. Expression: hashPrev == view.GetBestBlock() It appears when the main window shows "Loading wallet...". Long version: I built the executables from the latest source code from bitcoin GitHub repository. I had to use ... I don't know which QT version is used in Bitcoin Core 0.12.x but updating it to the latest or making a custom QT build with -no-directwrite flag should fix the bitcoin-qt.exe crashes on Windows XP. Please use one of the above solutions. Windows XP is not dead yet!

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Bitcoin & Cryptocurrency Market Price is Crashing, Why ...

Nur mit diesen Client (bitcoin-qt.exe) und TOR bist du recht sicher. Alles andere kann man ja ziemlich leicht im Netz sehen. Alles andere kann man ja ziemlich leicht im Netz sehen. Wo kauf ich ... Bitcoin Report Volume 8 - FLASHCRASH! WATCH THE BITCOIN CRASH TO ONE CENT COVERED LIVE! Baidu PC Faster: http://www.pcfaster.com/en/lp/wifiPopularize.php?from=nav -----... Binance СЕО LIVE: Bitcoin price prediction & Givе Awaу BTC Binance 3,674 watching Live now Hard Forks Killing Bitcoin, $100,000 TRON Bounty And Ethereum Passes Bitcoin - Duration: 28:07. bitcoin key database bitcoin key finder bitcoin key length bitcoin key algorithm bitcoin api key bitcoin alert key bitcoin alert key compromised bitcoin-all-key-generator bitcoin adder key bitcoin ...

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