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Building the unsigned transaction requires the input data(transaction IDs, vout, values), and is also good practice to check the network fee climate prior to setting a fee in the transaction you are building. Technically yes you could do it in two steps but it would be considered for advanced users only and still prone to typos or other errors during the ...


3

You can verify the legitimacy of Coinkite's Coldcard key generation, assuming that you've used Coldcard's feature of generating the entropy for the seed words by throwing dice (the key generated will be based on your dice throws and so wasn't surreptitiously built into the card). The web page https://coldcardwallet.com/docs/verifying-dice-roll-math gives ...


2

what exactly is flow involved in transfer of a bitcoin from my account on one exchange to someone else's on another exchange? Your intended recipient will have requested exchange 2 to generate a receiving address for your intended transaction. This receiving address is owned by exchange 2. The recipient will pass this address to you in any way that suits ...


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Enter output address, amount and click on pay: Decide the fee rate and click on finalize: You can export the transaction hex from bottom-left before or after signing the transaction: Make sure "Advanced Preview" is active in the preferences:


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In some cases you can generate your own 12 or 24-word seed phrase using open-source software on an isolated computer and use that phrase in the hardware devices recovery mode. For example The recovery phrase to restore private keys from. BIP39/BIP44 recovery phrases are supported. You should also, with some work, be able to independently verify that ...


1

Creating a transaction requires access to the blockchain in order to know which outputs can be spent by the wallet. Access to the blockchain requires access to the internet, thus any such computer will be online.


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Yes, you can use, for example, two or three different blockchain explorers to check the balance for your Bitcoin address(es). Or you can set up a watch-only wallet on any PC or phone - import the Bitcoin-addresses but not the private keys and the wallet cannot spend the money, only monitor. The money will be shown by the wallet as "watch-only" or &...


1

It seems like the general consensus on how long the actual cryptographic chip in the Ledger and Trezor devices will last is ~20-30 years, comparable to a standard flash drive. The Ledger Nano X has a battery that is rated for a 5 year lifespan, after which you probably won't be able to use it without plugging it in, although the cryptographic chip should ...


1

If the hardware device is lost or stolen (don't forget it's "sleek and small") it would impossible to retrieve the wallet as the PK is only be stored on the device itself? (If it can be stored anywhere else you are no longer resistant to malware attacks) All current hardware wallets use BIP 39 mnemonics. This is a sequence of 12 or 24 words which ...


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They don't and that's the point. The actual process varies probably from company to company, but generally, deposits into cold storage are automated, and withdrawals from cold storage require varying degrees of manual involvement. The process usually involves some of the following components: Air-gapped signing system The signing device is not connected to ...


1

That wouldn't be a cold wallet. A cold wallet is one where the private keys aren't stored on an Internet-connected device, even in encrypted form. If you just want to check your balance, you should be able to export your addresses, and import them as a watch-only wallet, then keep the private key file (even encrypted) off of your computer. Also, 10+ BTC is ...


1

If the computer that holds your wallet.dat file is ever connected to the internet (which it surely must be) then every second that it is turned on it is being probed by thieves attempting to break into it. If any succeed, your wallet.dat file is unprotected and will be copied and used. If you use email or a web-browser on that same computer then every ...


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What is the safest way to generate bitcoin wallet? From the existing software such as bitcoin-core? electrum? Ensure you are using open source hardware and nothing is backdoored. I am not an expert but Luke Dashjr might help you with this considering some interesting tweets in past. Ensure there are no malwares on system you use for bitcoin wallet. You can ...


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Are there any risks that my bitcoin will be stolen if the computer is hacked? Yes. Uninstalling software or deleting files will not remove actual data in disk blocks that have been deallocated. Mundane file recovery software may be able to recover those contents. Any computer connected to the Internet may have already been compromised by a hacker without ...


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It can be done offline and with no synced data. Start: .\bitcoind.exe -datadir=c:\bitcoin -prune=550 -noconnect Create transaction: .\bitcoin-cli.exe -datadir=c:\bitcoin createrawtransaction '[{\"txid\":\"some taxid\",\"vout\":0}]' '{\"some target address\":a_number}' To not spend all the sum, of course, add a ...


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