Questions tagged [offline-transactions]
Questions about transmitting bitcoins without the wallet being connected to the Bitcoin network.
34 questions
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Offline transaction on exchanges
Do cryptocurrency exchanges use offline transactions?And if yes when they use it?Also is offline transactions somehow related to off chain transaction?
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118
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How does a completely offline wallet "registers" and runs
A wallet which was made offline and will never ever see the internet how is it "registered" and runs in the blockchain. Is it through the watch-only wallet?
- 23
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142
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Bitcoin Core missing public key when generating PSBT transaction
I use Bitcoin Core for offline signing. I created a legacy watch-only wallet, imported a public key using importpubkey, then called rescanblockchain, then generated a psbt transaction text(psbt_tx_txt)...
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Globally offline node goes online but txs that were broadcast to it while off the net are not broadcast when it goes fully online
I have a Bitcoin Core node that I disconnected from the internet while keeping it on a hub with a laptop. I sent a transaction to that node from my laptop (via a local Electrum server). Now I put ...
- 261
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88
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How safe it is to store keys in Electrum? I think Luke Dash JR didn't recommend it
I agree with Luke Dash Jr and in general this wiki with the fact that doing anything without a full node is a mistake:
https://en.bitcoin.it/wiki/Clearing_Up_Misconceptions_About_Full_Nodes
But my ...
- 51
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2
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488
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Offline LN transaction
To broadcast on-chain Bitcoin transaction offline we need transaction hex which should be sent to a device which is online. Example: Government has shutdown internet in an area, text messaging still ...
user103136
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59
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If I buy crypto on a third party site, such as Coinbase or any other sites, how do I safely transfer my wallet into an external 'cold wallet'?
By cold wallet, I mean any type of encrypted USB etc. If this isn't possible how would I buy crypto and then be able to store it on a USB in the first place? This may be a stupid question but I'm kind ...
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Is it ok and safe to import master public key from electrum wallet into bluewallet to be a watch-only wallet?
I want to use my iPhone (Blue wallet) to be the watch-only wallet for my offline wallet generated on electrum. So that I can generate unsigned transaction on the bluewallet and send it back to my ...
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How to create a signed transaction offline using electrum?
I remember that on Electrum, it used to have a Preview button inside the Send tab. By clicking the Preview button I could export the unsigned transaction, and then sign it.
I cannot find this button ...
- 247
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1k
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Importing a private key (paper wallet) to Bitcoin Core client, while offline, is not actually importing
Trying to import a paper wallet to bitcoin core, while not having a fully synced node.
I've used: importprivkey 1Lblablablablabla "MyLabel" false
It returns "null", which I ...
- 161
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Is there some kind of USB antenna I can buy to be able to use Bitcoin even when there is no Internet?
Let's say they cut the Internet tomorrow. I will still have my private keys on my offline computer, but I won't be able to sync the blockchain (as won't anyone else) nor would i be able to make any ...
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CLI tool to sign a transaction using a private key in an offline computer
My Problem
Consider an offline computer that has a list of private keys for bitcoin addresses. The computer has some flavor of Linux installed on it, so it can run common CLI tools and Python scripts.
...
- 619
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I don't have data on my phone, can I still send and receive bitcoin without internet?
I dont have internet on my phone at all at the bitcoin ATM and want to know if i can still receive my bitcoin with my phone
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301
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Suggestion for Airgap Bitcoin Core - Comments?
Lesson learned the hard way: I lost a small value of bitcoins due to foolishly backing up private keys to a file which was uploaded to a cloud server. My wallet used to be bitcoin core.
Right now my ...
- 31
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106
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Bitcoin Core signing using signrawtransactionwithkey returns null
I am trying to sign a transaction to spend funds from a 3 of 7 multisig address.
signrawtransactionwithkey ...
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2k
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How to send bitcoin from an offline Bitcoin Core that doesn't have a synced balance?
I am setting up a cold wallet. How can I generate a signed raw transaction from bitcoin core wallet that controls some bitcoins?
PS: I generated the wallet using getnewaddress in console from the ...
- 247
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717
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Electrum multisig 2of2 on separate machines and both offline(cold storage)
I am lost sending coins from these Electrum 2of2 multisig wallets. Call them mutisig1 and multisig2. Both wallets have the 2of2 heading, presumably that means they are correctly setup, they were ...
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195
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What would happen to bitcoin in a world with no electricity/internet?
Many people discuss gold as an 'apocalyptic' currency because it will be what's used (supposedly) if the world ends, or there is some cataclysmic event that wipes out the power grid and internet ...
5
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1
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1k
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use old offline phone as a hardware wallet?
here's what i want to do:
store my private key on an offline phone.
use that offline phone to generate a signed transaction and generate a QR code for me to scan/broadcast with my online phone.
does ...
- 203
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245
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A Secure Offline Bitcoin Payment System
A paper titled Secure Wallet-Assisted Offline Bitcoin Payments with Double-Spender Revocation (https://www.ethz.ch/content/dam/ethz/special-interest/infk/inst-infsec/system-security-group-dam/research/...
- 165
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How can I avoid paying transaction fees?
A bitcoin transaction requires paying a fee to the network, and that fee changes depending on network congestion. During busy times the fee rate may increase substantially, so how can a user avoid ...
- 18.4k
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Is it possible to buy bitcoins via an exchange directly into cold storage?
I own a cold storage wallet. I want to buy bitcoins, directly into my offline wallet (in order to avoid extra transfer fees).
I understand i have to pay exchange fees. What I want to avoid is: buy ...
- 297
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149
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Double spend problem on a delay tolerant network
I recently read about the Digitally project, an overlay payment scheme for use on mobile phones, whose goals are to extend mobile phone payments to areas with poor connectivity and reduce transaction ...
- 165
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Use trezor securely
I'm trying to figure out how to use a Trezor for my needs. I'd like to have different "layers" of security, so my plan is to use this setup (less secure on top):
Online wallet for every day usage (1%)...
- 361
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677
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Offline wallet (Electrum) + Trezor not signing transactions
When I want to make a transaction I follow these steps
Create order in the ONLINE computer
Copy transaction to a USB
Plug USB to OFFLINE computer
Load transaction from file
Plug TREZOR
Sign ...
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285
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How to know how many bitcoins does my offline generated address hold?
Suppose I generate an address offline, using something like bitaddress.org
And then I receive some bitcoins on this address.
How do I know how much balance do I have on this address?
- 179
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407
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Offline payments with Android wallet
This Android application for Bitcoin wallet, claims offline payment as a feature. It says,
When you're offline, you can still pay via Bluetooth.
A payment is concluded only when the transaction ...
- 307
3
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2
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240
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Bitcoin backed fiat currency
Generally, fiat currencies have a number on them that identifies one paper note with other. Can a Bitcoin backed fiat currency be used or is in operation?
Let's say we have gold and their ...
- 131
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3
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253
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Does a thin client testnet wallet exist which allows offline signing?
I appreciate I can do offline singing with bitcoin-core, but it's complex. To make it easier, I would have to download the entire blockchain.
I have searched up electrum, but can't seem to find a ...
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1k
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In Lightning Network, what are the proposals for solutions to transfers to offline end users?
Basic examples in LN always mention payments from an online end user to other online end user. But let's say we want to send a micropayment donation to a blog that does not have an always online LN ...
- 1,074
3
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2
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974
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Safely transferring bitcoins from wallet.dat to cold storage
A similar question was asked by me in 2014, but I did not find the answer satisfactory back then, and I hope some things changed since in the last two or so years.
I have a wallet.dat file with some ...
- 619
1
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1
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3k
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Bitcoin offline transaction
Consider the following scenario:
create an entire bitcoin raw transaction while offline (no access to the blockchain)
only when you decided to broadcast it that you would need to get online
Is ...
- 524
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3
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8k
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Is there an easy-to-use tool for creating and signing offline transactions?
From what I understand, signing a transaction offline means I don't have to ever expose my private keys to a web-connected computer. From what I've found, the only program that allows something like ...
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2
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1k
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Is there an efficient and secure way to transmit bitcoins over shortwave radio?
This experiment by CBC that used chirp over the radio to transmit a wallet seed tickled my interest. Of course this isn't secure. And it's also inconvenient to create the wallet from the seed. What's ...
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