Bitcoin Stack Exchange
Bitcoin Stack Exchange

Questions tagged [offline-transactions]

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

32 questions
11
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1 answer

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 client. With an on-chain transaction, the payer can…
Wapac
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6
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3 answers

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 paying these fees in the first place? Is there a…
chytrik
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5
votes
1 answer

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 this exist?!? i cannot find an app to do it seems…
Farzher
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5
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3 answers

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 this with WIF keys is sx, are there any other…
skeeballassault
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5
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2 answers

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 a better way to do this in a practical way? Chirp…
barrymac
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4
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2 answers

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 bitcoin-qt GUI
bbnn
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3
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1 answer

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 created with their own seeds and then each used the…
grjack
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3
votes
2 answers

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 equivalent(approx.) as fiat currencies in the market. So…
Fakabbir Amin
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3
votes
2 answers

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 bitcoins on it. I would like to move the bitcoins…
Adam Matan
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2
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1 answer

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
Infinity
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2
votes
1 answer

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 bitcoins into wallet H (paying exchange fees), and…
blueFast
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2
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1 answer

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 transaction But during the signing process an error…
WristMan
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2
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0 answers

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), and finally successfully signed offline with…
MonKong
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1
vote
2 answers

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 keys are in electrum with an air gapped laptop…
Sal P
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1
vote
1 answer

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 fees. In summary: DigiTally enables two people to…
methuselah
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