Trait miniscript::psbt::PsbtExt

pub trait PsbtExt {
    // Required methods
    fn finalize_mut<C: Verification>(
        &mut self,
        secp: &Secp256k1<C>
    ) -> Result<(), Vec<Error>>;
    fn finalize<C: Verification>(
        self,
        secp: &Secp256k1<C>
    ) -> Result<Psbt, (Psbt, Vec<Error>)>;
    fn finalize_mall_mut<C: Verification>(
        &mut self,
        secp: &Secp256k1<C>
    ) -> Result<(), Vec<Error>>;
    fn finalize_mall<C: Verification>(
        self,
        secp: &Secp256k1<C>
    ) -> Result<Psbt, (Psbt, Vec<Error>)>;
    fn finalize_inp_mut<C: Verification>(
        &mut self,
        secp: &Secp256k1<C>,
        index: usize
    ) -> Result<(), Error>;
    fn finalize_inp<C: Verification>(
        self,
        secp: &Secp256k1<C>,
        index: usize
    ) -> Result<Psbt, (Psbt, Error)>;
    fn finalize_inp_mall_mut<C: Verification>(
        &mut self,
        secp: &Secp256k1<C>,
        index: usize
    ) -> Result<(), Error>;
    fn finalize_inp_mall<C: Verification>(
        self,
        secp: &Secp256k1<C>,
        index: usize
    ) -> Result<Psbt, (Psbt, Error)>;
    fn extract<C: Verification>(
        &self,
        secp: &Secp256k1<C>
    ) -> Result<Transaction, Error>;
    fn update_input_with_descriptor(
        &mut self,
        input_index: usize,
        descriptor: &Descriptor<DefiniteDescriptorKey>
    ) -> Result<(), UtxoUpdateError>;
    fn update_output_with_descriptor(
        &mut self,
        output_index: usize,
        descriptor: &Descriptor<DefiniteDescriptorKey>
    ) -> Result<(), OutputUpdateError>;
    fn sighash_msg<T: Deref<Target = Transaction>>(
        &self,
        idx: usize,
        cache: &mut SighashCache<T>,
        tapleaf_hash: Option<TapLeafHash>
    ) -> Result<PsbtSighashMsg, SighashError>;
}

Additional operations for miniscript descriptors for various psbt roles. Note that these APIs would generally error when used on scripts that are not miniscripts.

Required Methods

fn finalize_mut<C: Verification>( &mut self, secp: &Secp256k1<C> ) -> Result<(), Vec<Error>>

Finalize the psbt. This function takes in a mutable reference to psbt and populates the final_witness and final_scriptsig for all miniscript inputs.

Finalizes all inputs that it can finalize, and returns an error for each input that it cannot finalize. Also performs a sanity interpreter check on the finalized psbt which involves checking the signatures/ preimages/timelocks.

Input finalization also fails if it is not possible to satisfy any of the inputs non-malleably See finalizer::finalize_mall if you want to allow malleable satisfactions

For finalizing individual inputs, see also PsbtExt::finalize_inp

Errors:

• A vector of errors, one of each of failed finalized input

fn finalize<C: Verification>( self, secp: &Secp256k1<C> ) -> Result<Psbt, (Psbt, Vec<Error>)>

Same as PsbtExt::finalize_mut, but does not mutate the input psbt and returns a new psbt

Errors:

• Returns a mutated psbt with all inputs finalize_mut could finalize
• A vector of input errors, one of each of failed finalized input

fn finalize_mall_mut<C: Verification>( &mut self, secp: &Secp256k1<C> ) -> Result<(), Vec<Error>>

Same as PsbtExt::finalize_mut, but allows for malleable satisfactions

fn finalize_mall<C: Verification>( self, secp: &Secp256k1<C> ) -> Result<Psbt, (Psbt, Vec<Error>)>

Same as PsbtExt::finalize, but allows for malleable satisfactions

fn finalize_inp_mut<C: Verification>( &mut self, secp: &Secp256k1<C>, index: usize ) -> Result<(), Error>

Same as PsbtExt::finalize_mut, but only tries to finalize a single input leaving other inputs as is. Use this when not all of inputs that you are trying to satisfy are miniscripts

Errors:

• Input error detailing why the finalization failed. The psbt is not mutated when the finalization fails

fn finalize_inp<C: Verification>( self, secp: &Secp256k1<C>, index: usize ) -> Result<Psbt, (Psbt, Error)>

Same as PsbtExt::finalize_inp_mut, but does not mutate the psbt and returns a new one

Errors:

Returns a tuple containing

• Original psbt
• Input Error detailing why the input finalization failed

fn finalize_inp_mall_mut<C: Verification>( &mut self, secp: &Secp256k1<C>, index: usize ) -> Result<(), Error>

Same as PsbtExt::finalize_inp_mut, but allows for malleable satisfactions

fn finalize_inp_mall<C: Verification>( self, secp: &Secp256k1<C>, index: usize ) -> Result<Psbt, (Psbt, Error)>

Same as PsbtExt::finalize_inp, but allows for malleable satisfactions

fn extract<C: Verification>( &self, secp: &Secp256k1<C> ) -> Result<Transaction, Error>

Psbt extractor as defined in BIP174 that takes in a psbt reference and outputs a extracted bitcoin::Transaction Also does the interpreter sanity check Will error if the final ScriptSig or final Witness are missing or the interpreter check fails.

fn update_input_with_descriptor( &mut self, input_index: usize, descriptor: &Descriptor<DefiniteDescriptorKey> ) -> Result<(), UtxoUpdateError>

Update PSBT input with a descriptor and check consistency of *_utxo fields.

This is the checked version of update_with_descriptor_unchecked. It checks that the witness_utxo and non_witness_utxo are sane and have a script_pubkey that matches the descriptor. In particular, it makes sure pre-segwit descriptors always have non_witness_utxo present (and the txid matches). If both witness_utxo and non_witness_utxo are present then it also checks they are consistent with each other.

Hint: because of the segwit bug some PSBT signers require that non_witness_utxo is present on segwitv0 inputs regardless but this function doesn’t enforce this so you will have to do this check its presence manually (if it is present this will check its validity).

The descriptor must not have any wildcards in it otherwise an error will be returned however it can (and should) have extended keys in it.

fn update_output_with_descriptor( &mut self, output_index: usize, descriptor: &Descriptor<DefiniteDescriptorKey> ) -> Result<(), OutputUpdateError>

Update PSBT output with a descriptor and check consistency of the output’s script_pubkey

This is the checked version of update_with_descriptor_unchecked. It checks that the output’s script_pubkey matches the descriptor.

The descriptor must not have any wildcards in it otherwise an error will be returned however it can (and should) have extended keys in it.

fn sighash_msg<T: Deref<Target = Transaction>>( &self, idx: usize, cache: &mut SighashCache<T>, tapleaf_hash: Option<TapLeafHash> ) -> Result<PsbtSighashMsg, SighashError>

Get the sighash message(data to sign) at input index idx based on the sighash flag specified in the Psbt sighash field. If the input sighash flag psbt field is None the SchnorrSighashType::Default is chosen for for taproot spends, otherwise EcdsaSignatureHashType::All is chosen. If the utxo at idx is a taproot output, returns a PsbtSighashMsg::TapSighash variant. If the utxo at idx is a pre-taproot output, returns a PsbtSighashMsg::EcdsaSighash variant. The tapleaf_hash parameter can be used to specify which tapleaf script hash has to be computed. If tapleaf_hash is None, and the output is taproot output, the key spend hash is computed. This parameter must be set to None while computing sighash for pre-taproot outputs. The function also updates the sighash cache with transaction computed during sighash computation of this input

Arguments:

• idx: The input index of psbt to sign
• cache: The SighashCache for used to cache/read previously cached computations
• tapleaf_hash: If the output is taproot, compute the sighash for this particular leaf.

Implementations on Foreign Types

impl PsbtExt for PartiallySignedTransaction

fn finalize_mut<C: Verification>( &mut self, secp: &Secp256k1<C> ) -> Result<(), Vec<Error>>

fn finalize<C: Verification>( self, secp: &Secp256k1<C> ) -> Result<Psbt, (Psbt, Vec<Error>)>

fn finalize_mall_mut<C: Verification>( &mut self, secp: &Secp256k1<C> ) -> Result<(), Vec<Error>>

fn finalize_mall<C: Verification>( self, secp: &Secp256k1<C> ) -> Result<Psbt, (Psbt, Vec<Error>)>

fn finalize_inp_mut<C: Verification>( &mut self, secp: &Secp256k1<C>, index: usize ) -> Result<(), Error>

fn finalize_inp<C: Verification>( self, secp: &Secp256k1<C>, index: usize ) -> Result<Psbt, (Psbt, Error)>

fn finalize_inp_mall_mut<C: Verification>( &mut self, secp: &Secp256k1<C>, index: usize ) -> Result<(), Error>

fn finalize_inp_mall<C: Verification>( self, secp: &Secp256k1<C>, index: usize ) -> Result<Psbt, (Psbt, Error)>

fn extract<C: Verification>( &self, secp: &Secp256k1<C> ) -> Result<Transaction, Error>

fn update_input_with_descriptor( &mut self, input_index: usize, desc: &Descriptor<DefiniteDescriptorKey> ) -> Result<(), UtxoUpdateError>

fn update_output_with_descriptor( &mut self, output_index: usize, desc: &Descriptor<DefiniteDescriptorKey> ) -> Result<(), OutputUpdateError>

fn sighash_msg<T: Deref<Target = Transaction>>( &self, idx: usize, cache: &mut SighashCache<T>, tapleaf_hash: Option<TapLeafHash> ) -> Result<PsbtSighashMsg, SighashError>

Implementors