Transaction builder with Extended keys (HD Wallet)

[CardanoDur]

Got the transaction builder to work great with payment keys generated by cardano-cli so for my next test I wanted to use extended keys. Able to bring in the signing key just fine, it's the extended validation key that I can't figure out a way to get it witnesses to add to the builder.

The example Issue 2 shows when building out a raw transaction, but didn't find an example using the builder. I wouldn't have the transaction body to hash it, to build the payment signature and eventually the witnesses.

Is this possible and does an example exist?

Thanks,
Jason

[cffls]

Do you already have an extended signing key? If so, you can simply pass it to the method builder_and_sign of txbuilder like you did for regular keys, as documented here.

[CardanoDur]

Yeah, that's what I did initially, but got a MissingVKeyWitnessesUTXOW error. I assumed it was due to missing witnesses based on the validation key

[CardanoDur]

When I look at the signed TX from the build_and_sign method, the vkey cborHex is not extended. It's just a partial of the extended key

[cffls]

That means the extended signing key you were using didn't match the utxo you were trying to spend. You can verify by checking the hash of your public key with your_extended_signing_key.to_verification_key().hash(), and compare its output with the payment part of the address of the utxo you are trying to spend (utxo_to_spend.output.address.payment_part).

[CardanoDur]

I'm sure it's not a surprise that they don't match. Today is one of those days. I know my mistake, I grabbed an address from daedalus after putting the seed phrase into it, obviously that address doesn't match the utxos. Unfortunately now, after figuring out my mistake, I can't check b/c I'm getting a 404 on the builder.build_and_sign. Blockfrost isn't showing an issue either

[CardanoDur]

Well, that wasn't it either. I know my public key off the root is correct, it matches what Daedalus has as my wallet public key. But for some reason I can't get the signing key right. Can't get the hash to match the UTXO. My mind is mush...

[CardanoDur]

@cffls Thank you for your help, my issue was going for a shortcut. I didn't generate an address based off of the payment and staking keys, I just imported to Daedalus and grabbed an address then funded. Once I generated an address then funded that address (same stake, so it was a wasted internal transfer for the most part), the code worked great

[cffls]

Nice, thanks for the update!

[cffls]

Just found that you started sponsoring me. Really appreciate it. Thank you so much! ❤️