TracaChang

When I wrote this tutorial, taproot did not exist and there was no way to add new descriptors until Bitcoin Core 28.0, but now it is as easy as using the new RPC createwalletdescriptor.
https://primal.net/e/note1j6c2qrfphcx87wnr9fcpzqdehe39tr8lufkkx2zgwyx3vmtygmcs0lqx6v

2024-10-06 11:41:38

Tutorial - Bitcoin Core Create a watch-only wallet and sign transactions offline
Before we begin, you may be asking yourself:
-An airgap setup? Why not use a HW? All the cool kidz on twatter use it!
Most of the cool kidz on twatter are paid chillz, some of the hardware wallets they promote are not even FOSS and as soon as they release a new model they stop supporting the older ones. This setup will give you better security and privacy than most HW, I am not selling you anything and it will not cost you shit.
-Why Bitcoin Core? Other wallets like Electrum are easier for an airgap setup.
I have nothing against Electrum, in fact I really like it, but I choose Bitcoin core because it is the most reviewed client. No more questions? Let's get started!
These steps can be done with 2 PCs (recommended), or if you only have one PC you can use a Linux distribution like tails.
The first step will be to download Bitcoin Core, verify the signatures and transfer it to a USB flash drive (since the second PC or when booting with tails will never be connected to the internet).
----------------------------------------
Offline PC or with Tails
Double click on bitcoin-qt which is located in bitcoin-22.0/bin/.
Bitcoin-qt will start and ask us where to save the data, just click ok, nothing will be downloaded as we are not even connected to the internet.
https://image.nostr.build/4b175c3a2e32b8c64b8ff0b9d9cd87f3cf2365ef78f86eeaa1a72820e6fd1ff1.jpg
Create a new wallet, choose encryption and descriptor wallet:
https://image.nostr.build/76847b5599995569daf9a30990c10767d21b96aac01ee0de6e0004543c41d130.jpg
After creating the wallet, make a backup and save it to another device like a USB flash drive (if you are using tails, everything will be deleted after shutdown). To make a backup, just click on File -> Backup Wallet
Now we will get the information we need to create a watch wallet only.
Open the console (Window → Console or Ctrl+T) and type
listdescriptors
Note: This command is available since version 0.22.
https://image.nostr.build/7589213541331a6c078640bd1d0d5c9d2e4477758ac8b92cd06e337b9da5afba.jpg
This command will give us a list of 6 descriptors in total. We will use those with path derivation 84'/0'/0. (We will use this derivation for native segwit, bech32 but you can copy the whole list and export all the descriptors.).
Copy both to a text file and save it to the USB stick, in this example my .txt file will look like this
{
"desc": "wpkh([66bb13d5/84'/0'/0']xpub6CtDSW4S3XVd5uYp9CgsLTZKQcKieJSmjehcvfVJBSy1rPbkKNU3T6UmZ3mn7DoSsTsM6uH8ZKem7LQh3PHyrBAtZopSvF2tonEE7foTWFe/1/*)#a9twa6j5",
"timestamp": 1647182091,
"active": true
"internal": true
"range": [
0,
999
],
"next": 0
},
{
"desc": "wpkh([66bb13d5/84'/0'/0']xpub6CtDSW4S3XVd5uYp9CgsLTZKQcKieJSmjehcvfVJBSy1rPbkKNU3T6UmZ3mn7DoSsTsM6uH8ZKem7LQh3PHyrBAtZopSvF2tonEE7foTWFe/0/*)#v3w0q0zv",
"timestamp": 1647182091,
"active": true,
"internal": false,
"range": [
0,
1000
],
"next": 1
}
One descriptor has the value internal:false, the other internal:true. Internal false provides the information needed for the watch-only wallet to generate receiving addresses, while internal true is for the change addresses.
We can now shut down the PC/Tails.
----------------------------------------
Online PC.
Your online PC must have Bitcoin Core installed and synchronized.
Create a watch wallet only: Select Disable Private Keys, Create Blank Wallet and Create Descriptor Wallet.
https://image.nostr.build/a2b21d8c1c09ab7b18823f274fbc4ba3b430c5fe32077f49e4ee1f6a8ab1af93.jpg
Open the .txt where you saved both descriptors, go to the console and import both descriptors with their timestamps using the importdescriptors command.
In my example the command will look like this
first descriptor:
importdescriptors "[{\"desc\": \"wpkh([66bb13d5/84'/0'/0']xpub6CtDSW4S3XVd5uYp9CgsLTZKQcKieJSmjehcvfVJBSy1rPbkKNU3T6UmZ3mn7DoSsTsM6uH8ZKem7LQh3PHyrBAtZopSvF2tonEE7foTWFe/1/*)#a9twa6j5\", \"range\": [0, 1000], \"timestamp\": 1647182091, \"internal\": true, \"watchonly\": true, \"active\": true}]"
Second descriptor:
importdescriptors "[{\"desc\": \"wpkh([66bb13d5/84'/0'/0']xpub6CtDSW4S3XVd5uYp9CgsLTZKQcKieJSmjehcvfVJBSy1rPbkKNU3T6UmZ3mn7DoSsTsM6uH8ZKem7LQh3PHyrBAtZopSvF2tonEE7foTWFe/0/*)#v3w0q0zv\", \"range\": [0, 1000], \"timestamp\": 1647182091, \"internal\": false, \"watchonly\": true, \"active\": true}]"
https://image.nostr.build/eafb1c69e51bd86646d99f36991ea635ab2c5e219532cbc808f43e7eb313c983.jpg
This will import the descriptor with an initial keypool of 1000 (which is the default), any new addresses you request will come from their descriptors. If all is correct it will return "success": true
After this, only our watch wallet will be fully functional, allowing us to receive payments and create unsigned transactions.
Before receiving any payment in the watch wallet only, please make sure you have the wallet.dat backup of the offline wallet.
When you want to spend your money, just do it as usual, enter the address to pay to, set the fees, click Create Unsigned and save. This will generate a .psbt file which we will copy to a USB stick to sign with the offline wallet.
----------------------------------------
Offline PC or with Tails
If you are booting with tails, you will need to copy the bitcoin client, copy the backup of wallet.dat into the bitcoin folder ~/.bitcoin/wallets/wallet.dat
File→Load PSBT from file
Review the information and click Sign Transaction.
Once the transaction has been signed, click Save and save the signed PSBT file to the USB flash drive.
----------------------------------------
Online PC
File→Load psbt from file
Click Broadcast Tx and Done

2024-09-30 13:36:30

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No, it doesnt.

2024-09-26 19:22:14

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😂😂😂

2024-09-26 08:07:13

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Thank you, this is a very interesting initiative, looking at the web vpn's section I found Snowstorm, I wasn't aware of this project and I see that they are in beta. Have you tried it and if so can you share your thoughts?

2024-09-24 21:47:40

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He also promotes tail emissions

2023-12-19 12:12:00

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It is also useful to do peg in without paying commissions.

2023-12-12 16:53:35

If you use nix-bitcoin you can run Bitcoin Knots as alternative to BItcoin Core.
Just edit the configuration.nix file and add:
--------------------------
services.bitcoind.package = let
pkgsUnstable = import (builtins.fetchTarball {
# nixpkgs-unstable as of 2023-12-12
url = "https://github.com/NixOS/nixpkgs/archive/666fc80e7b2afb570462423cb0e1cf1a3a34fedd.tar.gz";
sha256 = "1j4ahdm49pbw5s1sw0vc0l12s1zxlnw0sjvnljxhdjbsvgbjsl7m";
}) {};
in
pkgsUnstable.bitcoind-knots;
--------------------------
https://github.com/fort-nix/nix-bitcoin/issues/664#issuecomment-1851831390
https://image.nostr.build/c37aae2afb9697bba6a83468c0c25bd9f1c2b6151ab53ab62c987416760914dc.jpg

2023-10-30 08:16:41

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Thank you, I wasn't aware about this system.

2023-10-29 08:05:14

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Has the android demo version been released? Discovered this project by listening to Vlad's podcasts, seems like cartridge is sold out but since I don't have a game boy I was looking for a way to get the android version.

2023-10-28 13:52:42

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😂😂😂

2023-08-28 07:22:45

I've just tried nixbitcoin and I have to say that it is mind-blowing.

2023-07-20 13:23:20

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Thanks for sharing it Max

2023-06-15 09:08:13

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What made you switch from android to iPhone ?

2023-06-12 08:25:00

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Will you offer binaries apk on github or add the app on f-droid? For now I was only able to find it in play store.

2023-06-04 17:36:50

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Oh I get it now. Thanks

2023-06-04 16:20:42

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Yes, it seems so that he's been captured by apple, I was listening his podcast and he said that Linux was a shitcoin. I was wondering if it was just a bad joke, but now I see him recommending apple notes.

2023-05-14 10:12:41

https://nostr.build/i/bb0227114795d3154b208202d7f415073f2c7a520df70b86f7047268926ef3b6.jpg

2023-04-06 08:52:31

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nobsbitcoin

2023-02-20 07:09:00

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But that is WoS and Muun fault, not graphene.
Using play services on graphene stills give you better privacy than using it on a regular android OS since play services will be sandboxed and won't have more privileges than any other app.
But the best solution is to have different profiles, the main where you do not have have any Google stuff, and another profile where you have play services with apps they need it like banking.

2023-02-19 22:35:18

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Those apps require play services , which can be installed in grapheme os, so yes, they work.

2023-02-13 19:19:18

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Or just use tor