Cole 🇿🇦
@ColeTU
I help people secure and understand bitcoin. ⚡ Latest video on YouTube:
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How to build a Casa multi-signature vault with two hardware wallets.
- Setup 2 hardware wallets from scratch (preferably, different vendors)
- Build a Casa vault using 3 keys
- How to receive and send Bitcoin
- Optionally: How to export wallet to Sparrow Wallet
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The main “complexity” with multi-signature is the descriptor file.
In order to “build” your multi-sig vault, you need the public keys for each wallet involved in that multi-sig.
Without the public keys, your wallet coordinator (like Sparrow) can not “access” your funds to build a spending transaction.
So if you do a 2/3 multi-signature, you can lose a seed, but you CAN NOT lose the descriptor!
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Here is information on all the mk3 wallets I created, that HAVE BEEN SWEPT by attackers:
Seed phrase only (swept instantly):
bc1qqh58wf33u6vcpurh493j46d23zz7jyn5s06sqn
Seed phrase + 1 word passphrase (swept in 6d 9h):
bc1q4nhqvhyvs342m52h46qw0mkjsejpcncwx4y46t
Seed phrase + 2 word passphrase (swept in 6d 9h):
bc1quz3e7l8ln8dh6e4q2xslzwk7kxn0qh5stqjjjc
Seed phrase + 3 word passphrase (swept in 6d 11h):
bc1q8u657zxp084pxgm5fcr5rgfqyyw4uvq8jzm87d
Seed phrase only, random account number (swept in 2d 2h)
bc1q4gj72x6zz3ax7q6fh4gefamcjjuhu6q0jpf03h
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How to Self Custody your Bitcoin - Complete Beginners Guide
