walletprocesspsbt "psbt" ( sign "sighashtype" bip32derivs )

The walletprocesspsbt RPC takes as input a PSBT, adds UTXO, key, and script data to inputs and outputs that miss it, and optionally signs inputs. Where possible it also finalizes the partial signatures.

*bitcoin-cli help walletprocesspsbt

walletprocesspsbt "psbt" ( sign "sighashtype" bip32derivs )

Update a PSBT with input information from our wallet and then sign inputs
that we can sign for.

1. "psbt"                      (string, required) The transaction base64 string
2. sign                          (boolean, optional, default=true) Also sign the transaction when updating
3. "sighashtype"            (string, optional, default=ALL) The signature hash type to sign with if not specified by the PSBT. Must be one of
4. bip32derivs                    (boolean, optional, default=false) If true, includes the BIP 32 derivation paths for public keys if we know them

  "psbt" : "value",          (string) The base64-encoded partially signed transaction
  "complete" : true|false,   (boolean) If the transaction has a complete set of signatures

> bitcoin-cli walletprocesspsbt "psbt"