Bitcoin Forum

Hello,

To avoid what happened with Bitcoin Puzzle 66:
https://i.ibb.co/8DqQkRCb/image.png

I look how to create raw transaction i found this steps:

Create the Transaction (Online): Build the transaction details (recipient, amount, gas, etc.) on an online device or application, but do not sign it.

Export Unsigned Data: Export the transaction data in a format suitable for offline use (e.g., JSON, raw bytes, or a QR code).

Transfer to Offline Device: Move this data to a secure, air-gapped (never online) computer or hardware wallet.

Sign the Transaction (Offline): Use the private key on the offline device to sign the transaction data, producing a signature.

Export Signed Data: Transfer the signed transaction (now with the signature) back to an online system.

Broadcast (Online): Broadcast the final signed transaction to the network from the online device.


Let start with this example;



reception add: 1w5aGn4acWJgtJMbnE4bLUDphWnPN9x33 

i want to send 1.5 BTC from 1JE12nzegHAEXkd7dJcSfUz5yjL9KTAtiH to 1w5aGn4acWJgtJMbnE4bLUDphWnPN9x33 
fee: 0.0001

Raw Transaction hex: ??

online example https://blockchain.info/rawtx/284abb50eef592bc67df021400acdec80830b416d6bdae0baadbb690f4aaf215?format=hex

i will appreciate if someone hlp m on this. thank you

What exactly are you trying to accomplish here? You're not solving any 6.6 BTC puzzles, so that's irrelevant. Even if you do, signing offline is meant to protect you from exposing your private key on a compromised system. The puzzle funds get stolen because broadcasting it exposes the public key, which makes it much easier to find the private key (given that a large part of it is known already).

Loyce is basically on the money. Offline signing protects your private key from a compromised online machine, but it does not prevent the spend from revealing the public key. For normal wallets that's a non-issue. For puzzle/weak-key stuff, that's exactly the issue, because the spend itself can give others what they need to finish the job faster and publish a conflicting transaction with a better fee.

So "offline raw tx" doesn't magically avoid the Puzzle 66 style race, it just avoids leaking the key through malware.

It's been mentioned many times. But the solution is either
1. Mine your own block (that include TX that claim puzzle reward).
2. Find miner or mining pool you can trust to include your TX, without broadcasting it on mempool.

thanks for replying, i want to learn how to create a raw txt of a transaction. to prevent pubkey from go online. on public pool
until it included in a block. (hope you understand me)

exactly. offline raw tx is protect you private key. my goal rom is topic is to learn how to create raw hex and send it privatley to  pool to be mine. to hid the public key from poblic bots.

viabtc or mara, till now don't know how to generate or create this raw hex to give to them

That's not possible. Public pools, like all nodes, broadcast transactions from their mempool.

Those are 2 completely separate things. One you can do at home, the other you need connections for. Or try https://slipstream.mara.com/ , the only pool I know that claims to do what you're looking for.

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Please read and correct your sentences before posting.

https://iili.io/fkhu5EG.png

The step you described is correct conceptually and is how people sign Bitcoin transactions safely not getting to expose private keys. The major mistake in many previous cases was doing all thing with an online machine. Whichever way, requesting for or creating a raw hex of transaction linked to a real private key in public is risky extremely. Whoever sees a valid key may end up spending those coins immediately. Also, transactions that are raw relies on particular UTXOs, not only an address, therefore you can't create one without haven knowledge of the exact inputs. The right approach is to make use of trusted tool such as Bitcoin core, Electrum, or a hardware wallet to build, sign offline, and equally broadcast. Make sure not to share private keys, WIFs, or data transactions that is not signed publicly.

Is that an answer given to your by AI?
It needs a few adjustments:

• It suggests using an Air-Gap machine, yet it told you to create a transaction which isn't possible without a pair "watch-only" wallet.
• It specifically mentioned Electrum/Core but the steps to export the serialized raw transaction is generic, not specific to those clients.

For the steps, just follow this tutorial except the "broadcast" part: /index.php?topic=5524213.msg64885706#msg64885706 (https://bitcointalk.org/index.php?topic=5524213.msg64885706#msg64885706)
In the last step of "Back to your offline PC" part, instead of exporting it as a '.txn' file, export it as text using "Share->Copy to clipboard" (paste it on a text file or other methods).
Then instead of exporting the copied signed raw transaction back to the watch-only only wallet, send that to Mara which has quite the reputation (but I can't vouch for it).