Struct StreamedPSBT

pub struct StreamedPSBT {
    pub psbt: PsbtWrapper,
    pub segwit_flags: Vec<bool>,
}

A PSBT that streams input transactions one at a time instead of holding them in memory.

The PSBT is still held in memory, but the input transactions are summarized and then discarded.

segwit_flags is a vector of booleans indicating whether we know that the TXO is segwit.

psbt.input.witness_utxo is populated if it is missing, and is otherwise compared with the input transaction to ensure that it matches.

Note that if the witness flag is false, we didn’t validate witness_utxo.

This is useful for the following use cases:

• in Lightning, where we must ensure that all outputs are segwit, or an attacker might malleate the funding transaction ID.
• if we might statelessly sign different inputs at different times, and the attacker might lie about different input amounts at different times (this is fixed in taproot).

Fields

psbt: PsbtWrapper

The PSBT

segwit_flags: Vec<bool>

For each input, whether we know that the TXO is segwit

Implementations

impl StreamedPSBT

pub fn new(psbt: PartiallySignedTransaction) -> Self

pub fn psbt(&self) -> &PartiallySignedTransaction

pub fn consensus_decode_global<R: Read + ?Sized>( r: &mut R, ) -> Result<PartiallySignedTransaction, Error>

Trait Implementations

impl Debug for StreamedPSBT

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Decodable for StreamedPSBT

fn consensus_decode_from_finite_reader<R: Read + ?Sized>( r: &mut R, ) -> Result<Self, Error>

Decode Self from a size-limited reader.

fn consensus_decode<R>(reader: &mut R) -> Result<Self, Error>

where R: Read + ?Sized,

Decode an object with a well-defined format.

impl Encodable for StreamedPSBT

fn consensus_encode<W: Write + ?Sized>( &self, writer: &mut W, ) -> Result<usize, Error>

Encodes an object with a well-defined format.