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2301  Other / Beginners & Help / Re: Bitcoind using all my RAM on: April 18, 2021, 09:37:54 AM
No, it's not normal behavior. Can you share command you use to run bitcoind?

But seeing that you've already tweaked most of the mentioned configurations, it's only -maxmempool=<n> that you're missing.

-maxmempool=<n> default value is 300MB, which doesn't explain why OP's bitcoind RAM usage is about 4GB.
2302  Bitcoin / Electrum / Re: Obelisk: An Electrum server using libbitcoin on: April 14, 2021, 10:13:51 AM
One thing I recommend is to first sync testnet, it's about 30 gigabytes only and play with that before going mainnet.

Good thing you mentioned it, i was thinking which file should i move to external drive. Coincidentally, i also run Bitcoin Core on testnet, so i can save some time and internet bandwidth.
2303  Bitcoin / Electrum / Re: Obelisk: An Electrum server using libbitcoin on: April 14, 2021, 09:43:40 AM
Strange. if this prefix is correct, then the binary should be in $HOME/.local/bin/bs, and the config file should be in $HOME/.local/etc/libbitcoin/bs.cfg
You can run it with the full path, after you configure bs.cfg. If they're not there, then something did error (or you perhaps ran install.sh with another user's privileges so it ended up in a different $HOME, like /root/.local).

I'm sure i didn't use different user or sudo to run the script. However, i solved the problem simply by replacing $HOME/.local with absolute path (on new directory solely for libbitcoin). I can run ./bs -v without any problem.

Code:
Version Information:

libbitcoin-server:     4.0.0
libbitcoin-protocol:   4.0.0
libbitcoin-node:       4.0.0
libbitcoin-blockchain: 4.0.0
libbitcoin:            4.0.0

Now i just need to configure libbitcoin-server and perform initial sync. However, i just notice i'll have 2 copy of Bitcoin blockchain with different format (owned by Bitcoin Core and libbitcoin), so i'll free my HDD for libbitcoin's blockchain. There shouldn't be any more problem and i assume libbitcoin will take few days to sync since i use HDD before i can test Obelisk.

For what it's worth, the autotools is generally the tool that is ran in a standalone context. The install.sh script also downloads all other necessary dependencies, like libbitcoin-system, and libbitcoin-node and does all that for you transparently.

Yeah, i noticed that.
2304  Economy / Services / Re: I'm launching a better Bitcoin wallet recovery service on: April 13, 2021, 09:35:05 AM
- prove that they lawfully acquired the cryptocurrencies (I will not deal with criminals or shady characters)

Isn't it difficult to prove that? From what i've seen, the users sometimes can't even remember if they obtain Bitcoin from faucet, mining, friend or exchange which didn't require identity verification.
2305  Bitcoin / Electrum / Re: Obelisk: An Electrum server using libbitcoin on: April 13, 2021, 09:07:19 AM
Keep in mind that libbitcoin v4 is still not fully finished, but Eric and the community are working on it.

Yeah, the README.md isn't complete and didn't mention that libzmq is required for compiling. libzmq repository shows there's .deb file, but there are dependency problem when i attempt to install it with apt and dpkg. I would rather not risking broke my system right now.
2306  Bitcoin / Bitcoin Technical Support / Re: Open source address index & query software on: April 12, 2021, 11:07:23 AM
There are many open source Bitcoin block explorer out there, there are few that you might haven't tried such as
1. https://github.com/mempool/mempool. This one can run Raspberry Pi, so i'd recommend this.
2. https://github.com/Blockstream/esplora

Both of them have some dependency though (Bitcoin Core with txindex enabled and Electrum server).
2307  Bitcoin / Development & Technical Discussion / Re: Collection of 18.509 found and used Brainwallets on: April 11, 2021, 09:15:43 AM
I was actually referring to the case where a site's database with the password hashes is stolen. Then you'd be able to run as many tries as you want.

I see, but AFAIK most website isn't that stupid. They usually would use salting, hash the password many times or just use algorithm focused on security (such as PBKDF2).
Meanwhile, most brainwallet only use single SHA-256 hash.
2308  Bitcoin / Electrum / Re: Obelisk: An Electrum server using libbitcoin on: April 11, 2021, 09:08:33 AM
Yeah, 1.4 up to 1.4.2., but still a few things need to be finished which I need help with, or just more spare time.

Basically Electrum 3.3.0 and newer are supported, at least according to these
https://github.com/spesmilo/electrum/blob/3.3.0/electrum/version.py#L4
https://github.com/spesmilo/electrum/blob/3.2.4/electrum/version.py#L4

Will do @ setup.py
I've been planning to make such a thing so Obelisk can even be installed with pip.

That's great, i'll try it if i can setup libbitcoin-server without any major problem.

I'm still reading how to setup libbitcoin-server and found out how to make it connect only to my Bitcoin Core client with peer = localhost:8333 on bs.cfg. However, i can't find out how to configure RAM usage and whether HDD will cause bottleneck or not.
2309  Bitcoin / Development & Technical Discussion / Re: Crazy pow power reduction idea on: April 10, 2021, 08:52:48 AM
If they could outhash and destroy Bitcoin any other crypto would be a walk in the park to destroy next..

Only applies to PoW-based cryptocurrency which uses SHA-256. If they plan to destroy another PoW-based cryptocurrency, they need to invest on different type of ASIC.

It would also destroy the confidence in all/any other crypto..

Good point, but also leads people to work on more secure alternative.

I see hardly anyone is interested in protecting Bitcoin from governments anymore, but rather keeping it in compliance with regulations..

Or currently thinking solution that actually works on reality.
2310  Bitcoin / Electrum / Re: Obelisk: An Electrum server using libbitcoin on: April 09, 2021, 11:05:33 AM
Since i never use libbitcoin, i'll just give basic feedback,
1. Have you compare the performance with ElectrumX or other Electrum server implementation?
2. AFAIK Electrum have it's own protocol and updated few times, so which Electrum (client wallet) version supported by Obelisk?
3. Is it right to assume Obelisk only support Linux?
2311  Bitcoin / Bitcoin Technical Support / Re: Full Bitcoin Node Costs on: April 09, 2021, 10:57:24 AM
Simply reduce your electricity bill by purchasing any SSD drive and you don't need your monitor running all the time.

You basically trade the hardware cost with electricity bill.
2312  Bitcoin / Development & Technical Discussion / Re: BitcoinSeedSplitter on: April 09, 2021, 09:48:19 AM
Thanks for sharing. Do you mind sharing how it works? Is it similar with how RAID 5 works?
2313  Economy / Exchanges / Re: open source crypto exchange on: April 08, 2021, 11:08:11 AM
See https://github.com/bisq-network/bisq, AFAIK it's most popular open source and decentralized exchange.
But if you specially ask about open source and centralized exchange, i've no idea.
2314  Economy / Service Discussion / Re: CoinHash.io - New Cloud Mining Platform on: April 08, 2021, 09:14:11 AM
I know cloud mining has had a bad rap over the last few years but there is a new platform in the works that will be integrating with Mining Rig Rentals via API to automatically purchase the required hashpower.

Then why don't we just rent hashrate from mining rig rentals?

CoinHash.io is promising to stay transparent, reliable and consistent and we are headquartered in Sydney, Australia.

People will expect you to show strong proof about existence of your company and the miners.
2315  Bitcoin / Development & Technical Discussion / Re: The Lightning Network FAQ on: April 07, 2021, 11:23:25 AM
Then what in your opinion is the difference
between Lightning Network and Liquid Network?

Why is the Liquid network FAQ topic not included?

No comment, i don't know much technical detail of Liquid Network.

Plus if Coinbase gives access to the user's bitcoin private keys, does that not invalidate your argument about control over bitcoin,
and thusly now elevate Coinbase offchain system to a required topic in this forum.

If Coinbase gives access to the user's bitcoin private keys and open-sourcing their software or share full protocol specification, i don't mind such topic.
For example, how Coinbase make batch transaction and implement queue user's outoing transaction might be interesting discussion.

Will questions regarding Litecoin/LN now also be answered in these topics, since LN also supports litecoin?

Someone might answer such question. But if you actually mean "Should " (rather than "Will"), it depends whether the question also can be applied to Bitcoin on LN.

Besides, there are many thread which mainly not about Bitcoin, but still on "Development & Technical Discussion" board. Some examples from current first page,

LN & Liquid may use segwit / locking features of bitcoin program code, but their own code development is separate ,
therefore, I have no choice but to consider them 3rd party.

Looks like term "third party" have different meaning to us.
2316  Other / Meta / Re: An option to fix default trust on: April 07, 2021, 09:27:25 AM
Let DT1/2 members have a full signature and everyone else have restrictions.  

This will make trust system abused more than ever, such as
1. Pay $XX to include you to DT2 for X months
2. Pay $XX to exclude competitor from DT2 for X months
3. etc.
2317  Bitcoin / Development & Technical Discussion / Re: The Lightning Network FAQ on: April 06, 2021, 08:53:30 AM
Why isn't this thread in the altcoin section?

Because this thread actually about LN for Bitcoin (although LN support many cryptocurrency) and some parts of LN directly involve Bitcoin network (such as HTLC script used to open and close channel).

You have a valid point, any discussions related to 3rd party offchain systems should be in a separate topic.

Lightning Network & Liquid, and any other offchain systems should not be considered as bitcoin, IMO.
Just as any Exchange's separate offchain database is excluded from discussion here , so too should other 3rd party offchain networks.

While Lightning Network is off-chain system, IMO it can't be categorized as 3rd party since it's possible user have control over their Bitcoin.
2318  Other / Beginners & Help / Re: Error after Electrum wallet update on: April 04, 2021, 09:25:17 AM
The wallet file is created with Electrum 4.1.0 (see https://github.com/spesmilo/electrum/blob/4.1.0/electrum/wallet_db.py) or newer, while your Electrum is version is 4.0.9.
If you update your Electrum to to 4.10 or newer (currently it's 4.11), you should able to open the wallet file.

P.S. make sure to download from electrum website and verify the file.
2319  Bitcoin / Wallet software / Re: Extra security for a Wasabi Wallet? on: March 29, 2021, 11:57:58 AM
Bonus question: Would repeat naming, using and then deleting "Wallet0" actually REMOVE that info from a hard drive?

If you want to actually remove that from the hard drive, you should use external software to do it. For Windows you want to use BleachBit. If you're linux user, tools called shred should be available by default.

However, if you use SSD, deleting the file normally (not moving to recycle bin) will ensure the file deleted permanently after some time because TRIM operation.
2320  Bitcoin / Bitcoin Technical Support / Re: Accessing wallet.dat file on corrupted Hard drive on: March 28, 2021, 10:49:24 AM
Interesting that the original message was that the file was corrupted but now say parameter is incorrect. No idea what that means.

On windows, usually i would use chkdsk tool. But since the hard drive contain important file, i strongly recommend you to make a raw copy of your hard drive before doing anything else. On windows, usually i use HDD Raw Copy Tool to do it.

I would post screen shots but no idea how to do that on this forum

You can upload it somewhere (such as imgur) and share the link.
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