So my question is: is Blockchain the same as Coinbase or the same as Electrum?
Does anybody know this? I could not find this in their FAQ anywhere.
In terms of handling funds, Electrum and Blockchain.com are the same because both are non-custodial. You'll be spending your " unspent transaction outputs" ( UTXO) from your received transactions to create a new transaction. So if you're receiving funds with a single address, all your withdrawals will use the UTXOs associated with that address in your wallet; to mitigate that, you just have to use a different address every time you receive funds so " receiver A and B" will see that the txns came from different addresses. You'll have more options in Electrum by utilizing " coin control" for better selection of UTXO. Coinbase ( Wallet/Exchange) is different, it' a " custodial service", withdrawals came from different addresses because those are Coinbase's " Hot Wallet" used for withdrawals. Different addresses, yes, but in terms of privacy, authorities or whoever in contact with them can easily point your identity based from their database and/or blockchain analysis, custodial services aren't really that private with their hot wallets, even a regular user can tell that it's from Coinbase by using walletexplorer.com. |
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-snip-
However, Bitcoin transactions should be improved and scammers are worse than victims. They must be gotten rid of to make Bitcoin ecosystem clean and clear.
Like I have mentioned, the feature is available and standard to the Bitcoin network, it's called " rbf" ( replace-by-fee) that can be utilized for double-spending those unconfirmed wrongly sent transactions. The issue is if the client/wallet supports that " feature", that's why I've suggested you to use Electrum because if that's your client, you could've cancelled that transaction since you've already noticed that it's a scam right after clicking 'send'. If you want your wallet to have a similar feature, you can open a " feature request" in their repository page if it's open source, contact their support if it's a closed-source wallet. Explain that you want them to implement something similar to Electrum's " cancel (double-spend)" feature. |
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It's been almost a month since you found a " security flaw" in Bitcoin ( BITCOIN SECURITY). Please let us know if you already found any balance from the " infinite private keys" that you've found. |
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Totally ignored my request for proof.
-snip-
You said you're looking for a way to track them and involve law enforcement, right. Then I'd suggest you to keep your communication with the suspect by stalling with few of more of those " questions" and show it to the authorities. Police may be able to get some leads if they are knowledgeable in crypto and if the scammer is dumb enough. Yes, the email domain is different from the website domain. Email domain is @ltdblockchain.com, website is blockchain.com. So maybe phishing.
Yes it is phishing, blockchain.com's email should be from @blockchain.com or @<subdomain>.blockchain.com - with dot before the url. ( and the replies should be weeks to months apart :D) |
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-snip-
I realized something wrong right after entering the sending button.
If the transaction is stopped in the middle, the number of bitcoin scam victims can be greatly reduced. just a few-minute difference makes their life miserable.
If you'll ever hodl Bitcoin again, I'd suggest you to use Electrum ( electrum.org | verify signature). Because it has a convenient " Cancel (double-spend)" button that perfectly " solves" that statement. With Electrum's default setting with enabled " Use RBF", you can basically cancel a mistakenly sent transaction by automatically creating a double-spend transaction with your own address as the output, that's as long as it doesn't have a confirmation yet. BTW, I saw your other post about the details of the scam, and it's the most obvious type of scams out there. I'd say you need to research more about all sorts of scams before going back to " investing" again. |
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also, is there a way to back up the blockchain info and save those so i don't have to download the entire thing each time i set up a node?
" Blockchain info"? You're not talking about the online wallet with the same name, right? For the blockchain and other data, just copy the entire data directory to your other computer ( same directory) and it should run fully synced. The default data directory is in: https://en.bitcoin.it/wiki/Data_directory#Default_LocationExclude the " wallets" folder if you do not want to copy the wallets. |
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Hi
In 2009 and 2010, I was involved in membership sites that offered free bitcoins
But I have not removed the received bitcoins from the site
-snip-
That's too early for custodial services, according to some articles, even the earliest Exchanges just emerged in 2010. By saying "free bitcoins", perhaps you meant a "faucet"? Like this old faucet?: freebitcoins.appspot.com |
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This old post may be the one you're looking for and I believe it's the process used by most vanity address generator including Vanitygen for split-key generation: Re: custom bitcoin address wanted. |
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The master key must be generated differently. if the seed is used not bip39 but "seed-segwit".
-snip-
I hadn't noticed it but I think you also need to edit another part of PawGo's code to work with Electrum: From: -snip-
final static byte[] SALT = "mnemonic".getBytes(StandardCharsets.UTF_8);
-snip-
: -snip-
final static byte[] SALT = "electrum".getBytes(StandardCharsets.UTF_8);
-snip- |
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You'll probably get better replies from this board: Bitcoin > Mining > Mining supportTry to move this using the " move topic" button at the lower-left side of the page, I'll also ask a Mod to move this thread to that board in case you're not allowed to move it. |
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-snip- Maybe you know how to do it in Java in this case?
Try to incorporate Electrum's derivation path to the code that you're probably using ( This code?: /index.php?topic=5360581.msg57965406#msg57965406). I'm not a Java programmer but based from what I understand, these few edits should derive the correct keys/addresses of Electrum's P2WPKH: From: How can I integrate m / 84 '/ 0' / 0 '/ 0/0 into my code? I just need to get the first 5 addresses. I looked at your program, but there is a whole class forming a complex configuration. Too difficult for a beginner. How can I just hardcode the derivation path into my method?
-snip-
DeterministicKey deterministicKey = createMasterPrivateKey(seed, createHmacSha512Digest());
deterministicKey = HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(84, true));
deterministicKey = HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(0, true));
deterministicKey = HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(0, true));
deterministicKey = HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(0, false));
for (int i = 0; i <= 5; i++) {
System.out.println(Address.fromKey(MainNetParams.get(), HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(i, false)), Script.ScriptType.P2WPKH));
}
-snip-
: -snip-
DeterministicKey deterministicKey = createMasterPrivateKey(seed, createHmacSha512Digest());
deterministicKey = HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(0, true));
deterministicKey = HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(0, false));
for (int i = 0; i <= 5; i++) {
System.out.println(Address.fromKey(MainNetParams.get(), HDKeyDerivation.deriveChildKey(deterministicKey, new ChildNumber(i, false)), Script.ScriptType.P2WPKH));
}
-snip-
The path in the code is m/0'/0 (from m/84'/0'/0'/0), the extra child key is for the 'external chain' ( receiving addresses), change to '1' for internal ( change addresses). But then again, I'm not a Java programmer so the part that I've edited could be wrong :-\
For the derivation path, You can actually directly see it in the wallet menu ( Wallet->Information): Refer to these images: | P2WPKH (Native Segwit): m/0' | | | P2PKH (Legacy): m | |  | |  |
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-snip-
Don't have wallet.dat for any, just passphrase, seed etc.
Those with a seed I think you can recover that with the seed,for example Electrum and Exodus use a 12 word seed as a recovery option and Electrum goes even further if I remember correctly that it can also support other seeds as long as they are BIP39 compatible but it is a long time since I don't use it daily so I don't remember correctly.Go to this section to read more about Electrum. https://bitcointalk.org/index.php?board=98.0-snip-For Electrum, it's not necessary, Electrum neither supports any of the coins mentioned by the OP. There's a fork for BTCP but it's abandoned and there's no active server to connect to. |
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alright. so i found the wallets folder that has folders for both wallets i created. i can open each folder and now locate each "wallet.dat" file for each individual wallet. couple more questions
1) is there any reason i shouldn't just copy the entire "wallets" folder and save it to a few flash drives and burn it to a dvd, instead of ONLY the "wallet.dat" files themselves?
You can do that but only if Bitcoin Core isn't running or your backup could be corrupted ( with low chance). 2) for each "wallet.dat" file, i can change the name in front of ".dat" and it won't affect the file, but i would need to change it back to "wallet.dat" when try to restore, correct?
If you did the above, and each wallets are inside a folder with a 'wallet name', then you don't have to rename them in the first place, the wallet name is that folder's name. If you rename the wallet.dat inside it, the folder wont work as a wallet and you won't be able to select it in " Open Wallet" menu. Otherwise, you can rename the wallet.dat files and put them inside " wallets" folder ( but outside of any folders inside) and it will be available for selection in the " Open Wallet" menu even if they have a different name ( your "wallet_name.dat" backups from "File->Backup Wallet" for example). |
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On the pop up window it shows the following.  It has been like this forever, do i have any options left? It could mean that the transaction is invalid or just dropped from mempools. Since your node is synced, that transaction must have been marked from " Unknown" to " Unconfirmed: not in mempool" after scanning the blockchain. Note: " Not in mempool" mean that the transaction is neither in your node's mempool nor in the Blockchain. You can use testmempoolaccept command to see if you can still send it to the nodes, follow this:
For the password, I can't help you with that. |
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one last question that is a bit different. the only way to have one private key/public key pair for a particular wallet is to only have a single receive address, correct? i plan to set up a temporary wallet and then a hodl wallet for long term saving. for the hodl wallet, only having one address and one public/private key pair would be ok and simpler to keep track of if my short and medium term plan is to only fill the wallet and not spend, yes?
Will the funds be coming from a single source? If yes, then I think it's fine to use a single address for the " hodl wallet", eg. ExchangeA -> hodl wallet's address; but not if it's coming from multiple sources like your " temporary wallet" and exhanges, because you might end up linking those sources to each other and to your hodl wallet. how often is it recommended to make a new back up copy of the wallet.dat file?
If says " HD" at the lower-right ( says "HD key generation is enabled" when hovered), your current backup is enough to restore the newly derived addresses. But if you want to keep the labels updated, update your backup as well. |
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-snip- and put it in rice ... yeah I know.
Oh no, that's our *Secret Asian Technique* to keep the moisture at bay :D But I believe he already contacted someone ( hopefully a trusted professional) to recover the drive as a response to LoyceV's suggestion. |
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-snip-
so lets say today i create a wallet using electrum and safely store the "seed phrase", and lets say after 15 years if i reinstall the then latest eletrum and create new wallet using my current seed phrase, i will be able to access my coins.
It's hard to give a safe answer to that since 15 years is too long to speculate, but: So far, Electrum is doing a great job with its " backwards compatibility" after these years. Versions before the new seed version system ( Electrum <2.0 - older than Oct 2015~2012) can still be imported to today's latest version ( v4.1.5) and can restore exactly the same wallet. With exception to the oldest releases ( v0.34 & older) with patched bugs and changes in the key derivation system. |
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4) my understanding is that if the BTC core wallet has "HD" in the bottom right, i don't need to dump the private keys, as the backup/wallet.dat file will have all that info. is this correct or do i need to make a physical backup of every private key as well. Yes, the backup of the wallet files are enough but make sure that the backups are made after you've encrypted the wallet files. That's because it'll generate a new " hdseed" after encrypting the wallet, making the old backups obsolete. 2) I have actually created a backup file already, but the backup file that is created does not seem be a .dat file. when i save it to a USB stick or DVR and look at the file on a windows computer the file type says "21 file". is that correct or is the back up more than just the .dat which would be contained in the overall backup file?
Windows has an option to hide/show the file extension but since it says " Type: 21 file", it means that the extension isn't " .dat" which shouldn't be the case with " File->Backup Wallet". You can display the extension in Windows in the 'file explorer' menu " View->File Name Extensions". however, i suppose that is how i need to do it to make absolutely sure i have the right file/files. If i have two wallets created/set up, will each wallet have its own wallet.dat file? if so, how do i tell them apart? sorry, i know these are likely very basic questions.
Yes, 1 wallet = 1 backup with " .dat" extension. You can set a name when you use " File->Backup wallet" but make sure that the correct wallet is selected in the " Wallet:" drop-down menu at the right, you can also set a wallet name during wallet creation ( in the later versions). IMO, naming those differently is enough to tell them apart from each other. |
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When I create a new wallet using the seed phrase using BIP39 the wallet just comes up empty  How about the other two options? If all are empty, then there's really an error in your backup. Recovering the wallet file from the laptop is your best option which has a great chance, as long as the " tea" hadn't penetrated the HDD/SSD. |
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I don't currently have access to the old file, it was just on the laptop that got tea spilled on it! I can try and get it recovered... but it doesn't look good. The situation seems hopeless though... is there anyway of contacting Electrum for help with this?... I mean their website just brings me to this forum anyways.
Electrum developers wont be able to " directly" help you in recovering your seed phrase since it isn't stored to any server. You'll likely get the same advice as these. Have you tried to restore the seed phrase with BIP39 option enabled? That will enable you to click " next", then select one of the options ( start with the middle). Users usually use that to create Electrum wallet with P2WPKH-P2SH ( P2SH-SegWit) addresses. |
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