Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [offline-transactions]

Questions about transmitting bitcoins without the wallet being connected to the Bitcoin network.

3
votes
1answer
135 views

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 ...
0
votes
1answer
19 views

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 ...
4
votes
1answer
135 views

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 ...
0
votes
1answer
38 views

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/...
5
votes
3answers
1k views

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 ...
1
vote
1answer
774 views

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 ...
0
votes
1answer
100 views

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 ...
0
votes
1answer
137 views

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%)...
2
votes
1answer
353 views

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 ...
1
vote
1answer
236 views

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?
1
vote
1answer
303 views

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 ...
4
votes
2answers
197 views

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 ...
1
vote
3answers
172 views

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 ...
10
votes
1answer
1k views

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 ...
4
votes
2answers
693 views

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 ...
1
vote
1answer
3k views

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 ...
4
votes
2answers
5k views

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 ...
4
votes
2answers
738 views

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 ...