What is the most secure way to generate a 12 word seed for a hardware wallet. I would like to also add a passphrase.
Usually, it's best to just use whatever procedure the hardware vendor suggests... The brain is a terrible source of entropy, so whatever method you're using not suggested by the vendor, it's usually worse than just following the proper procedure. This does not mean there aren't good ways to create a 12 word seed yourself, but usually your own methods aren't more secure than the recommanded methods anyway (imho) |
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Hello,
Thank you for your reply. Could you give me any hints to send it anonymously (workaround)? I know some of the things like using VPN, Tor etc. But, I am not sure this will solve the issue or not.
Thank you
Well, I'm definitely not going to give a walkthrough, since I these hints can also be used for illegal purposes. But in order to hide your IP, there are vpns, tor, i2p, proxy's, public hotspots. There are also p2p exchanges that can be done to purchase btc. In order to break the link between wallets, there are mixers and anonymous crypto currencies... Or buying coinbase rewards from miners. You can also rent hashrate and mine clean coins directly, or use an exchange that does not require kyc (sometimes kyc is not needed for btc to altcoin exchanges) |
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Hello,
I need to send some amount to one person anonymously. That means, the opposite person should not know my identity and source details. For this, I tried to register with Bitcoin provider. But, they are asking my bank account details to fulfill their KYC (Know your customer) norms. I understand and agree that I should give my bank account details to the provider. Once I send the amount through Bitcoin to the other person (Receiver), is there any possibility to track my details through Bitcoin? Is really Bitcoin is the trustworthy to send the money anonymously?
Thanks in advance.
CP
All transactions can be traced. If you buy btc from an exchange that enforces kyc regulations, and directly pay the receiver with the btc you bought, you can in fact be traced. Bitcoin is pseudo anonymous. There are ways around this, but you need to know what you're doing... |
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Can someone name trusted bitcoin wallet/s..
https://bitcoin.org/en/choose-your-walletIf you're just starting out, i'd stick to the desktop wallet section, If you're holding a bit more, i'd stick to the hardware wallets, or investigate paper wallet or airgapped wallets. I'd recommand you to stay away from the web wallets. |
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As we know each blockchain transaction has inputs and outputs
If all transaction inputs are spent then these inputs doest not contain important information anymore as it will not participate in any future transactions
And we can find blocks that consists of such transactions only and we can remove all this data preserving only block hash
So this means that a blockchain will not grow forever , it will grow forward but closer to the begining blocks can be replaced by its empty placeholders
Going this way we, of cause, lose transactions history but integrity would be ok
Why would the integrity be ok? Very simplistic, if each block contains only 1 transaction: Block 1 coinbase reward funds address 1a creating new unspent output b Block 2 unspent output b funds address 1b creating new unspent output c Block 3 unspent output c funds address 1c creating new unspent output d If every node in the network would prune block 1 and 2 (since all unspent outputs created by transactions in these blocks were now spent), how would the network ever know about unspent output c? It would be impossible for somebody to verify where unspent output c came from... We would just have to assume unspent output c exists, funds address 1b and is valid? If you don't like to synchronise your wallet, you can always use an SPV wallet if you want... |
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Please is bitcoin mining network real?...i was asked to create new Blockchain wallet fund it and get it connected to antminerS9
It is real or scam?please dont mind my English
These "mining" services that force you to create a blockchain.info wallet, fund it and pass your wallet info to them are always a scam.In order to fund a wallet (pay you), the only thing somebody needs is an address generated by your wallet... NEVER EVER give somebody access to your private keys, password, unique identifier, wallet file,... Since you've asked this basic question, i'll give you some friendly pointers that relate to this question: - Private keys are private, never share them, never share ways that can compromise private keys (wallet files, seeds, xprv, identifiers, passwords,...). Make sure you don't give other people unauthorised access to your PC so they can steal your wallet (don't install shady software, don't let an untrusted person take over your desktop with teamviewer or VNC,...) - Stick to desktop wallets on a clean pc, airgapped wallets, hardware wallets or paper wallets... Don't keep your funds in an online wallet or exchange - BTC mining is a business, you can't mine using a cpu/gpu/outdated ASIC or if your power price is to low... Cloud mining is allmost always a scam |
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Mayor update: the script is now also running on the main net: https://www.mocacinno.com/lightning/The reason for putting this script on the main net is because the only places currently accepting lightning payments on the main net still offer goods that are way to expensive for testing purposes (imho). At this moment, the images on my site cost 50 sat's per step, so for less that 0.0004 USD you can now test a lightning payment on the main net... Waaaay better for testing purses than risking $1 for a simple testrun  I'd still encourage everybody to test the LN on the testnet FIRST... My site is only on the mainnet because i've seen a lot of people that are unwilling to run tests on the testnet, and at this moment they're spending several bucks just to try the LN... At this moment, i've just ported the script to the main net, it it untested (for now) since i left my hardware wallet in my bankvault, so it's inaccessible to me at this point in time. I'll pass by the bank tomorrow, fund my mainnet lightning wallet and give the script a testrun
If somebody is willing to do a testrun, the image currently online is just 50 sat/step... I won't reimburse you for trying, i mean: the fee for a reimbursement transaction is more than the testamount, so i'd be wastefull if i'd have to reimburse 50 sat
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Hi! I've seen this https://satoshis.place/ website. Thus I am looking for a simple guide that would explain how do I pay in bitcoins using lightning network. Does bitcoin core supports this feature? Bitcoin core isn't a lightning wallet... You can run a bitcoin core node and install c-lightning on top of it... C-lightning makes use of your core installation to function. As for a simple walktrough: i made a lightning application on the testnet and wrote a walktrough on how to use it: https://bitcointalk.org/index.php?topic=4559889.msg41080256#msg41080256Mainnet is about the same as the testnet, but i'd encourage you to try LN on the testnet first  |
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--snip-- Yea, the figures I used was just a thumb suck scenario and probably grossly exaggerated. Most people are not as lucky as you to deduct your home loan payments for tax purposes. You from Europe? / UK / USA / Asia / Africa? Based on last years growth of over 800% in one year from my Bitcoin investment, I would have been able to buy that house from the profit I made in 1 year. <I agree that last year was probably a fluke and that we might never see that again, but what if we do?> Some people are even saying that it would be better to save that money in a Bank at a fixed interest rate.  I'm from the EU... And yeah, i do realise i'm pretty lucky i can deduct my intrest from my taxes In the end, for me it's pretty simple: i have a kid, it's my duty to make sure she has a roof over her head, food on her plate, gets a good education, can go to a doctor when she's ill... I realise that if i'd invested all my money into crypto when i first heared about it, i would have been rich by now, but like NeuroticFish said: it's a high risk investment, and i don't gamble with the health or happiness of my kid. If i'd invested everything into crypto, i could have lost everything, and by now i could have been living in a social housing block. I realise that i missed out on really big profits, but at least my kid will have a house when i'm gone |
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We had a very interesting discussion over the weekend and people debated if it was better to invest in property or to invest in Bitcoin. The argument was as follows : 1. Most people cannot afford to buy property, so they take a home loan at a Bank. The home loan is paid back with interest and some of these loans are spread out over 20 years to make it affordable to the person who takes out the loan. So, over that 20 years the house of $100 000 will cost you say $1 000 000. {$900 000 paid in interest} The argument is also that the property has to increase in value, with more than $900 000 for you to say that it was a good investment AND you have to sell that property to get that profit. 2. The other side of the room said it was better to rent a smaller property and to invest the "savings" into something like Bitcoin, because your profit will pay for a bigger deposit or even a whole property in a few years time. I think paying a high interest rate to a Bank is just as bad as paying rent to a Landlord, because you are getting screwed in both these circumstances.  Well, if you'd pay $900.000 intrest on a $100.000 loan over 20 years, you should switch banks immediately I took a loan of €150.000 over 20 years when i bought my house 10 years ago, in the end i'll have to pay about €40.000 intrest, but i can deduct this intrest from my taxes, so in the end i'll pay about €20.000 out of pocket to loan €150.000 for 20 years (this are approximate numbers). I'm a big fan of crypto, but i'd personally rather have a house to live in than a big fat crypto wallet... I guess i'm to oldfashioned I do realise i can get a lot more profit when i would have invested all my money into crypto, but you can't live in your wallet... |
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What problems in the world can Bitcoin and blockchain technology solve ?
The blockchain technology can solve many problems. It's a decentralised, immutable, trustless ledger (database)... There are tons of scenario's that pop to mind, basically any scenario where equal partners want to create a database between them, but don't fully trust one partner to run a classical database out of fear this one partner that hosts the db would tamper with the data. You can use a blockchain database to store insurance information and share it between insurance companies and individuals; univeristy's can use it to store hashes of grades, titles, diploma's, so somebody interviewing for a job can immediately be crosschecked about the diploma's he/she claims to have;... and those are just 2 commonly known examples. For bitcoin, the blockchain technology solves, amongst other things, the double spending problem. By storing transactions onto a decentral, trustless, immutable ledger, people can not double spend unspent outputs without their transactions getting rejected (given that the first transaction is already included in a block at the time the double spending transaction is broadcasted). Even the people that hate crypto currencies see the potential behind the blockchain technology |
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--snip--
how did you get those addresses? are they some address you found on the internet or did you generate them with some bitcoin wallet? if yes which wallet?
This ^^ is the most important question that's been asked in this thread. In order to generate a watch only wallet, you just import an address (*any* address really, you don't need to own the private key to the address to begin with), so the only thing your watch only wallet can do is scan the blocks for new unspent outputs funding the imported address and create the sum of the unspent outputs funding this address. In order to spend these unspent outputs, you really, really, really need the private key. The only way to help the OP is when we know wich wallet he used to generate the address whitch he imported into his watch only wallet to begin with... |
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Hello
I want to compile my wallet on my mac .. it is High Sierra 10.13.4
or
if there is X Comple on Linux for comple dmg file this will very good
so please i want steps for compile Altcoin wallet it's clone from LTC
Thanks
A long time ago, i succesfully did a gitian build of a mac OS wallet (only tried it once, since i don't own any apple hardware, so i have no need for a mac os wallet), if your (alt)coin has correct gitian sources, you *should* be able to crosscompile your wallet for linux, windows and mac by following the gitian step-by-step tutorial. For example, bitcoin has up-to-date gitian sources + walktrough: https://github.com/bitcoin-core/docs/blob/master/gitian-building.md |
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Thank you for this detailed instructions. After a few initial parse errors I was able to create the transaction with createrawtransaction "[{\"txid\":\"id\",\"vout\":n}]" "{\"address\":amount}"
I just had to escape the double quotes. Yup, those quotes get me every time, it usually takes me 3 or 4 tries before i can create a raw transaction  If you run into any other problems, give us a shout! |
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I have a staking wallet on a small VPS with a high amount of small inputs and would like to combine them. Due to the low hardware resources I am running only the wallet daemon without GUI. Is there an easy way to combine only the small inputs (I don't want to lose the weight of the larger inputs)?
If you wallet was forked from bitcoin core, it'll probably allow you to: listunspent ( minconf maxconf ["addresses",...] [include_unsafe] [query_options]) followed by createrawtransaction [{"txid":"id","vout":n},...] {"address":amount,"data":"hex",...} ( locktime ) ( replaceable ) followed by signrawtransaction "hexstring" ( [{"txid":"id","vout":n,"scriptPubKey":"hex","redeemScript":"hex"},...] ["privatekey1",...] sighashtype ) followed by sendrawtransaction "hexstring" ( allowhighfees )
Basically: find the txid and vout of all unspent outputs you wish to combine, then manually create a transaction with the unspent outputs from the first step as an input, and an output funding one of your own addresses (sum of the value of the inputs - sum of the value of the outputs = fee). You can easily generate a new address to fund using "getnewaddress ( "account" )" Afterwards, sign this transaction and broadcast the signed transaction. AFAIK, that's the only way to spend *some* of your unspent outputs using the cli. |
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I follow the exact same strategy, but it is cumbersome and you might miss some good trades whilst you wait for confirmations. < Last year, I missed a lot of good trades, because the confirmations took hours to confirm and in many instances these exchanges were overloaded and not accessible, when the price was at it's peak >
I just figured that there must be some better way to do this. Something with less risk and more user-friendly than these decentralized exchanges. < Let's Brainstorm a bit, there must be a better alternative >
I can't really think of any good alternatives, maybe that's because i don't trade often enough? I'm still undecided wether or not i like the lightning network, but if exchanges would allow deposits over the lightning network, this could avoid confirmation times for bitcoin deposits... It doesn't change anything for altcoin deposits tough, so this idear isn't really helpfull i'm afraid. IF you'd have a lightning channel with your exchange, you could easily deposit in a matter of seconds, withdraw in a matter of seconds, re-deposit,... everything with 0 fee and a lot less risk than keeping your funds in your exchange wallet... But like i said: at the moment it would only work for bitcoin, and it's not even 100% certain that the lightning network will take off. |
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Personally, i always try to speak up whenever a newbie (or worse: a longtime member) admits to using an exchange as their wallet... Like you already said: this is not a good idear.
When i use an exchange it's usually
Deposit => wait for minimum confirmations => trade => withdraw
Usually, my coins are on an exchange less than 2 hours before they're transferred out to a different wallet (hardware wallet if my ledger or trezor support the altcoin in question, a desktop wallet if they don't).
As for your question wether or not we need these services: i personally think they're a necessary evil. P2P trading isn't without risks either, and i personally think it's a lot more hassle to setup a P2P trade compared to doing a quick trade on an exchange with a good reputation.
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I just do the same thing through coinb.in, it's reasonably easy and you can just set the locktime yourself. You can definitely turn something similar into a service, people would probably be interested in it. If you manage to build a service that does this, please update thats what i was thinking, most people dont know what locking and things like that are, so this is for them, and untill i learn to code this will just be a dream as i have no funds to hire someone to do it  you don't need to hire somebody, like eternalgloom already said: if you don't know how to create a transaction manually, you can always use coinb.in - suft to coinb.in
- download their sourcecode
- unzip the sourcecode, open the index.html
- go to new => transaction
- enter a funded address for which you own the private key
- click on "advanced", enter a locktime
- as output, enter an address whose private key you also own... The value of the output should be the sum of the values of the inputs minus the fee*
- generate the unsigned transaction, save it on your disk, go offline
- open coinb.in's index.html again, click on sign
- paste your unsigned tx + private key, sign the transaction, save the signed transaction, reboot your pc, go back online
- use coinb.in or any other service that allows you to broadcast signed transactions to broadcast your transaction
* in order to calculate an appropriate fee, you can always use https://coinb.in/#feesEDIT on the 4th of june 2018: it seem like coinb.in might have some problems signing, it might be best to try out this procedure on the testnet*
source: https://bitcointalk.org/index.php?topic=4594240.0;topicseen |
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