Get Xpub for Specific Address on Ledger Nano

HCP

legendary

Activity: 2086

Merit: 4316

Quote from: dmanny77 on February 02, 2018, 11:22:47 AM

Trying to recover BCH sent to BTC segwit. Being asked for Xpub for a specific address. I exported the Xpub per instructions, but the response is that the xpub is wrong.
I suspect i am exporting the Xpub for the wrong address since they change.
Is there a way to find the Xpub for a specific address on Ledger nano?

Specific addresses don't have an "xpub"... the "xpub" is the master public key, from which all the addresses are derived.

It seems there might be a "bug" within the Ledger Wallet Bitcoin (Chrome App) that gives you an "xpub" for your SegWit wallet... which possibly should be a "ypub" for BIP49? Huh

I'm not 100% sure on this point and haven't been able to find a solid answer if it should be "xpub" or "ypub" Undecided

. The best reference I have found which explains the difference in simple terms is: https://support.samourai.io/article/49-xpub-s-ypub-s-zpub-s

Basically:
- xpub = Legacy wallet (legacy Bitcoin addresses)
- ypub = SegWit wallet (P2SH-P2WPKH addresses)
- zpub = SegWit wallet (P2WPKH addresses)

And from the Electrum release notes:

Quote from: cellard on February 02, 2018, 12:37:29 PM

From what wallet did you send BCH to a segwit address? it is a nested or bech32 address? I find it weird that a BCH wallet would allow you to send coins to a segwit format address, unless I misunderstood your post.

It isn't weird... Ledger Nano (S and Blue) wallets generate P2SH-P2WPKH SegWit addresses... they start with "3" and are "backwards compatible" by design... as such, they look identical to any other P2SH "3" address and are therefore valid on both BTC and BCH networks.

jackg

copper member

Activity: 2856

Merit: 3071

https://bit.ly/387FXHi lightning theory

Quote from: dmanny77 on February 02, 2018, 11:22:47 AM

Trying to recover BCH sent to BTC segwit. Being asked for Xpub for a specific address. I exported the Xpub per instructions, but the response is that the xpub is wrong.

I suspect i am exporting the Xpub for the wrong address since they change.

Is there a way to find the Xpub for a specific address on Ledger nano?

Feeling stupid!

The xpub is an extended public key, it contains all computers need to produce any wallet address you can use that corresponds to that xpub. It's essentially a master public key.

Each address is a public key (it is it's own, individual xpub but it's xpub string is instead a 1).

Think of it this way:
When a HD wallet is generated, a master private key (prv) is generated. This key produces your xpub. The prv can be used to obtain every private key of an address it is computationally synthesised from your seed. These are then used to produce/reproduce addresses (public keys beginning with a 1) and private keys (normally in plain text beginning with an l, a k or a 5).

Only your private keys/master private keys can spend coins, public keys can just produce addresses, provided you got the right wallet, it has only ONE xpub.

cellard

legendary

Activity: 1372

Merit: 1252

Quote from: dmanny77 on February 02, 2018, 11:22:47 AM

Trying to recover BCH sent to BTC segwit. Being asked for Xpub for a specific address. I exported the Xpub per instructions, but the response is that the xpub is wrong.

I suspect i am exporting the Xpub for the wrong address since they change.

Is there a way to find the Xpub for a specific address on Ledger nano?

Feeling stupid!

Quote

Find the HD Public key for your wallets:

Open the Ledger Wallet Chrome bitcoin app
Click your account in the overview, it’s called “My account” by default
Click “Account Settings” in the top right corner, under the balance
Click “Export” next to “Extended public key”
And when you see the QR code pop, you’re ready to begin the next part.

You can test the address by going to: https://blockchain.info/xpub/123XYZ where 123XYZ is your public key. You should see your transactions and balance.

source: https://keepingstock.net/storing-your-cryptocoins-in-a-bank-with-a-ledger-wallet-52d7895b9dd

From what wallet did you send BCH to a segwit address? it is a nested or bech32 address? I find it weird that a BCH wallet would allow you to send coins to a segwit format address, unless I misunderstood your post.

dmanny77

newbie

Activity: 1

Merit: 0

Trying to recover BCH sent to BTC segwit. Being asked for Xpub for a specific address. I exported the Xpub per instructions, but the response is that the xpub is wrong.

I suspect i am exporting the Xpub for the wrong address since they change.

Is there a way to find the Xpub for a specific address on Ledger nano?

Feeling stupid!

Topic: Get Xpub for Specific Address on Ledger Nano (Read 202 times)