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2121  Bitcoin / Electrum / Re: Electrum verification question/issue? on: March 26, 2022, 03:09:21 PM
It's successfully verified; However, you haven't certified neither of the three keys.
Thats it?  Awesone!  What exaclty happens when I certifiy? It is confirming these keys are legit?  Thankyou!
Aside from Blackhatcoiner's reply, it's also useful in case you imported a fake key and successfully verified a fake electrum with a signature of it.
If you've certified only the real keys, the real Electrum will show that it has "valid signatures" instead of what you've seen "the data could not be verified".

I haven't mentioned but, before certifying a certificate, it's very important to look for some legitimate source where you can verify the fingerprint.
For example: ThomasV's certificate that I've imported has a fingerprint 6694 D8DE 7BE8 EE56 31BE D950 2BD5 824B 7F94 70E6 which is
the same as the one in the official documentary: https://electrum.readthedocs.io/en/latest/gpg-check.html and from various users' replies.
But better if you can verify it from the person himself: https://github.com/ecdsa
2122  Bitcoin / Electrum / Re: Electrum verification question/issue? on: March 26, 2022, 12:00:04 PM
It's successfully verified; However, you haven't certified neither of the three keys.

To certify the keys: Open Kleopatra, right-click on Thomas Voegtlin's key, select "certify", tick all three checkboxes and the one below "I have verified the fingerprint".
Then click next and finish the rest of the steps. Do this to the other two keys.
2123  Bitcoin / Bitcoin Technical Support / Re: Why all this hype with Hardware Wallets when Bitcoin Core is all you need? on: March 26, 2022, 05:36:38 AM
That was on ledger, in version 0.13 if not wrong. Just search ledger lost funds chane address, you will find all information about it.
Got any more details? Google yields nothing and it must have been a different version than 0.13 since no such version exists in Ledger's release history.
Adding quotation marks to "change address" yields related results, specially these:

However, it's more of a client issue (Ledger Live) than the hardware wallet itself, fund is safe all along.
2124  Bitcoin / Electrum / Re: Problem updating from 4.1.5 to 4.2.0 on: March 25, 2022, 03:36:40 AM
The problem is probably with the version of python you have installed. The minimum version of python required for running electrum has been increased.
-snip-
The Windows binaries don't rely on an installed python in the Operating System, it should work without installing python; instead, they bundled python dll files in the binaries themselves.

However as stated in the Release Notes, it's now incompatible with Windows7.
2125  Bitcoin / Bitcoin Technical Support / Re: keypool default is now 3000? 20Kb only for 3000. on: March 25, 2022, 03:09:59 AM
-snip-
I thought the default keypool was 1000, so now the default has changed to 3000? What also surprises me is the size, having a keypool of 3000 and only 20Kb.
I think because descriptor wallets store descriptors instead of private keys, so it has a keypool of 1000 descriptors for each address type,
while with private keys, all three address types can be derived from it.

You can test it by using the config: keypool=100n (some value higher than the default);
then you'll see that the result of getwalletinfo for a descriptor wallet has three time the keypoolsize of what you've set.

For the size, it's partly because the database used for descriptor wallet "SQLite" is lighter than legacy wallets' "Berkeley DB".
But mostly because the newly created wallet only stores the "parent descriptors" for each script type which are very small is size compared to storing individual private keys.
2126  Bitcoin / Bitcoin Technical Support / Re: How miners gets rewards for their efforts after successfully mining a block. on: March 24, 2022, 10:34:17 AM
-snip-
Question: Is the incentive for miners in (1)and(2) above the same. Please I need clarity on this aspect.
No, they aren't the same.

Come to think of it: If (2), the "block reward" is only the sum of (1) the transactions' "fees",
then there will be no new coins produced in mining and (2) will be a false statement.
2127  Other / Beginners & Help / Re: Bitcoin sent to me but not received? What is this ? Help please on: March 24, 2022, 05:00:21 AM
To support hosseinimr93's reply:
This is the original transaction that had the 0.007BTC output the sender spent on your "not-received" transaction: 2781fa06820f9307291602e409a9276342d48a0dea6d7bbe344ba0b779f7316c
It's replaced by 824fc21240b279e6638b1fc6a7c8090dd201180efcd535cf9752dd7a716e3ade so, your transaction (its child transaction) is invalidated as well.

There's no reason to increase the fee at that time because 1.35sat/B is good enough to be mined in the next block so it must be a scam.
But it wouldn't hurt to ask him if he used "increase fee" or "RBF" to bump the fee because that invalidated the txn he sent to you.

Important note: you must not finish a deal until the transaction has at least 1confirmation.
2128  Bitcoin / Electrum / Re: Incompatibility v4.1.5 and v4.2 on: March 23, 2022, 04:11:04 AM
-snip-
I just thought it useful to raise the question, as I had not come across the issue/feature before.
Tip: a solid indication that the wallet file's version will be upgraded is if the new version of Electrum wont launch your wallet right after you open it.
Instead, first, it will show you the "Install Wizard" - Choose wallet window:

Pressing "Next" will upgrade the wallet file.
2129  Bitcoin / Electrum / Re: Electrum Wallet - I downloaded 4.2 but now getting error message loading wallet on: March 23, 2022, 03:49:27 AM
It worked on Friday after installing but tried to load wallet yesterday and this was the message:
Sometimes, this happens when you tried to install the updated version while the older version is still running that'll make the next session use the outdated version.
If that's the case, then just reinstall 4.2 and this time, close every running Electrum instance.

Otherwise, you may still be using the shortcut to the older version as mentioned by others.
2130  Bitcoin / Electrum / Electrum Combine RBF Transaction example on: March 23, 2022, 03:35:12 AM
nc50lc     Whether I'll enable it depends on how much is the maximum amount of fees I'd be saving for a bit less privacy?
Pretty much yes.

But in most cases, it wont even save you fees.
Since it's generally an "RBF transaction", the replacement (combined transaction) requires an additional fee equivalent to the fee of the to-be-replaced transaction(s), it also needs to pay for its own fee.

Example (testnet - SegWit):
  • 1st transaction (rbf: true)
    Size: 144 vBytes | fee: 144 satoshi (@1sat/vB)
  • Combined transaction (if you send while the setting is enabled and the 1st txn is still unconfirmed)
    Size: 178 vBytes | fee: 322 satoshi = 178 satoshi (@1sat/vB) + 144 satoshi equal to the absolute fee of the replaced transaction
  • Based form the example, it's actually a bit cheaper if the two transactions are sent separately: each will pay 144 satoshi @1sat/vB.

This setting is good for the network though since the overall transaction size is lower than two separate transactions.
Means that you can help the network to save some block space.
2131  Bitcoin / Development & Technical Discussion / Re: Intentionally make a transaction slower on: March 22, 2022, 10:29:55 AM
For Windows:

Code:
timeout <number of seconds> && bitcoind sendtoaddress <bitcoinaddress> <amount>
It will work as long as the command prompt is still open until the timeout runs out.

Also, the command should be using bitcoin-cli since bitcoind doesn't support wallet RPC commands.
2132  Other / Beginners & Help / Re: Be the first newbie to answer correct and get 1 merit on: March 21, 2022, 02:31:38 PM
But from what I know, SHA-1 is a one way hash right? It isnt possible to decrypt it without maybe brute forcing? Because thats what the hash is meant to be - irreversible?
-snip-
Unless I'm missing something here...
Yes, you're correct, there's no way to reverse it aside from bruteforce.

But there's only about 600million song titles out there,
just make a database of all the songs titles, create a simple code to perform SHA1 to each of the titles (and probably variations of them) and a typical computer can bruteforce it within a few minutes/hours.
Then you can get 1 merit  Grin
2133  Bitcoin / Electrum / Re: Installed portable version electrum on new computer cant find/start electrum? on: March 20, 2022, 01:46:46 PM
already enabled ”Use Replace-By-Fee” And Below that option there is ”Batch RBF transactions” So im unsure if I should tick that one as well.
-snip-
If unsure, just keep the default settings as it's set to maximize privacy while keeping the best features enabled;
With that "Batch RBF transactions" is disabled by default.
2134  Bitcoin / Electrum / Re: Installed portable version electrum on new computer cant find/start electrum? on: March 20, 2022, 10:58:15 AM
You don't have to delete your post once it got answered, users in the web who are looking for support may be able to use it for reference.

Quote from: Thomas29
1st question the description for RBF transactions is pretty vague so I'm unsure if I should enable that setting or leave it disabled?
It's to flag your transactions as "replaceable" but only until it's mined, useful in cases where you need to increase the fee by replacing it with a higher fee transaction or if you've sent it to the wrong address.
If it's enabled, "increase fee" and "cancel transaction" right-click options in the history tab will be available for txns created after it's enabled.

The downsides that I can think of are: some services that doesn't support RBF may not credit your deposits if you've used RBF to increase the fee;
and some exchange/casino with zero-confirmation deposits wont grant that feature to transactions with RBF flag.

Quote from: Thomas29
2nd question is should I disable "output value rounding" as it says at most 100 satoshis might be lost due to this per transaction but I don't know how much USD loss that would potentially be?
One satoshi is equal to 0.00000001 BTC; so "at most" 100sat is currently about 4 cents (USD).
2135  Bitcoin / Armory / Re: Not Preparing Databases on: March 20, 2022, 03:02:28 AM
BitcoindError: bitcoind not found
Is Bitcoin Core installed in a non-standard directory?
If so, you should specify where it is installed in "File->Settings...->Bitcoin Install Dir" and make sure the checkbox above it is ticked.

2022-03-19 10:56:55 (INFO) -- ArmoryUtils.pyc:1303 -    Available HDD (ARM)   : 2 GB
You may have to move armory's dbdir as well because the database will use more than that available disk space.

Refer to the "pathing" link above for the guide on how to set the dbdir.
I'd recommend the config files because the setting in the GUI is quite buggy when setting Armory's dbdir.
2136  Bitcoin / Armory / Re: Not Preparing Databases on: March 19, 2022, 09:11:14 AM
Posting the logs may speed things-up, it's in your Armory data directory named armorylog.txt.
There's no information in your post that can tell the actual issue.

-snip- I sent 35$ into this wallet expecting it to actually work like most technology, but that hasn't been the case.
If you want to move out those funds from Armory, you can just export the private key of the funded address and import it to another wallet.
If you're interested, you can check this post: https://bitcointalk.org/index.php?topic=4746784.msg43255691#msg43255691

But please be careful with the private key(s) because anyone who got their hands on it will be able to spend your funds.
2137  Bitcoin / Bitcoin Technical Support / Re: BTCrecover seed recovery with custom token list on: March 19, 2022, 02:18:45 AM
That would mean this argument is ok, right?
--bip32-path "m/44'/60'/0'/0"
Since you've said that the "descramble example" worked which is using a command with that arg.
Then it's okay because it wont look for the "common derivation path" if bip39-path arg is specified.
2138  Bitcoin / Electrum / Re: Electrum 4.2.0 strange dll errors on: March 18, 2022, 05:01:05 AM
electrum-4.2.0.exe - systemerror

The programm cant start because api-ms-win-core-path-I1-1-0.dll is missing from your computer.
try reinstalling to fix this problem.
-snip-
I checked the electrum folder after installing 4.2.0 agian the missing python39.dll was indeed in the folder.
Have you tried "System File Checker tool" already?
It's a built-in tool in Windows that uses 'Windows Update' to fix/replace corrupted system files, you don't have to download anything with your browser.

Specifically, this command:
Code:
DISM.exe /Online /Cleanup-image /Restorehealth
Enter it in your elevated cmd: right-click "Start" and select "Command Prompt (Admin)".
Or refer to the link in my previous post for the usage and other info.
2139  Bitcoin / Bitcoin Technical Support / Re: How to avoid re-downloading full blockchain node? on: March 18, 2022, 03:52:00 AM
@littleinsect2018
This link is worth mentioning here since we're doing Bitcoin Core Cold-storage set-up wrong (or at least outdated)
I confirmed that it works without exporting the blockchain to the offline machine: /index.php?topic=5390009.msg59557548#
2140  Bitcoin / Bitcoin Technical Support / Re: Bitcoin Core signing offline after the keypool of 1000 question on: March 18, 2022, 03:51:23 AM
Alternatively, you can refill the keypool on-the-fly with the command: keypoolrefill <new keypool size>
Hi first, of all thanks the tip!
-snip-
I've done a tutorial step by step if you are interested.
https://medium.com/@ChangTraca/bitcoin-core-as-cold-storage-sign-transactions-offline-and-generate-receiving-addresses-from-the-f0b2de8436b5
No problem,
Thanks for the link too, I missed the \"watchonly\": true, argument that can make a proper watching-only wallet.
What I've been using in my test is the console and various commands to manually make a PSBT that'll be imported to the offline machine.

Anyways, since we're at it, I'd like to add a step to that tutorial to include the change (internal) addresses so you wont have to manually add a change address in every transaction that needs change.

To get the "parent descriptor" for the change addresses, use the command listdescriptors.
The one for the change addresses has "internal": true," result | also pick the script type of your choice.
Then import it the same way you've imported the receiving addresses' parent descriptor.
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