feat: return indexes along with outputs returned by produces()

pallas-traverse/src/tx.rs

@@ -232,16 +232,32 @@ impl<'b> MultiEraTx<'b> {
  }
  }
 
- /// Returns the list of outputs produced by the Tx
+ /// Returns a list of tuples of the outputs produced by the Tx with their indexes
  ///
  /// Helper method to abstract the logic of which outputs are produced
  /// depending on the validity of the Tx. If the Tx is valid, this method
- /// will return the list of inputs. If the tx is invalid, it will return the
- /// collateral.
- pub fn produces(&self) -> Vec<MultiEraOutput> {
+ /// will return the list of outputs. If the Tx is invalid it will return the
+ /// collateral return if one is present or an empty list if not. Note that the
+ /// collateral return output index is defined as the next available index after
+ /// the txouts (Babbage spec, ch 4).
+ pub fn produces(&self) -> Vec<(usize, MultiEraOutput)> {
  match self.is_valid() {
- true => self.outputs(),
- false => self.collateral_return().into_iter().collect(),
+ true => {
+ self
+ .outputs()
+ .into_iter()
+ .enumerate()
+ .collect()
+ }
+ false => {
+ self
+ .collateral_return()
+ .into_iter()
+ .map(|txo| {
+ (self.outputs().len(), txo)
+ })
+ .collect()
+ }
  }
  }