How can I process a PSBT created with createpsbt using bitcoin-cli?

[Jodmapht]

Hi,

I am trying to move from creating a transaction using createrawtransaction on a networked computer and sigining it using signrawtransactionwithkey on a non-connected computer to using psbts. The createpsbt function seems to work fine, but I don't know how I can sign it in the other system using the key? There is no "processpsbtwithkey" function?

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[1715178072]

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[Edwardard]

There is no "processpsbtwithkey" function?

No such RPC.
Try these:
 

Code:

walletprocesspsbt

:(Updater, Signer, Finalizer)

Code:

finalizepsbt

: (Finalizer, extractor)
Refer : PSBT Howto for Bitcoin Core.

[Jodmapht]

There is no "processpsbtwithkey" function?

No such RPC.
Try these:
 

Code:

walletprocesspsbt

:(Updater, Signer, Finalizer)

Code:

finalizepsbt

: (Finalizer, extractor)
Refer : PSBT Howto for Bitcoin Core.

I don't have a wallet on the non-connected computer, I just want to provide the PSBT and the private key as an input to sign the transaction...

[Edwardard]

just want to provide the PSBT and the private key as an input to sign the transaction...

You mean a signrawtransactionwithkey type RPC call for psbt ? I guess, we don't have any for now. walletprocesspsbt is the only way, unfortunately.
EDIT

Is there any plan to add such functionality? Thanks!

Sry, not sure!

[Jodmapht]

just want to provide the PSBT and the private key as an input to sign the transaction...

You mean a signrawtransactionwithkey type RPC call for psbt ? I guess, we don't have any for now. walletprocesspsbt is the only way, unfortunately.

Yes exactly, it would be very useful for offline signature of PSBTs. Is there any plan to add such functionality? I am right that as opposed to an unsigned raw transaction, a PSBT contains all the required information to sign it offline (excluding the private key)? Thanks!

[achow101]

There is a proposal for a descriptorprocesspsbt RPC that would do signing.

[Jodmapht]

There is a proposal for a descriptorprocesspsbt RPC that would do signing.

Ok thank you. And normally this should work to sign a PBST offline without any access to txindex or the mempool, similarly to signrawtransaction?

[achow101]

Ok thank you. And normally this should work to sign a PBST offline without any access to txindex or the mempool, similarly to signrawtransaction?

As long as the PSBT is updated with all of the necessary data.