feat(traverse): introduce small QoL improvements (#567)

pallas-traverse/src/redeemers.rs

@@ -53,6 +53,18 @@ impl<'b> MultiEraRedeemer<'b> {
         }
     }
 
+    pub fn into_conway_deprecated(&self) -> Option<conway::Redeemer> {
+        match self {
+            Self::AlonzoCompatible(_) => None,
+            Self::Conway(x, y) => Some(conway::Redeemer {
+                tag: x.tag,
+                index: x.index,
+                data: y.data.clone(),
+                ex_units: y.ex_units,
+            }),
+        }
+    }
+
     pub fn from_alonzo_compatible(redeemer: &'b alonzo::Redeemer) -> Self {
         Self::AlonzoCompatible(Box::new(Cow::Borrowed(redeemer)))
     }

pallas-traverse/src/tx.rs

@@ -199,9 +199,9 @@ impl<'b> MultiEraTx<'b> {
 
     /// Return inputs as expected for processing
     ///
-    /// To process inputs we need a set (no duplicated) and lexicographical
-    /// order (hash#idx). This function will take the raw inputs and apply the
-    /// aforementioned cleanup changes.
+    /// To process inputs we need a set (no duplicates) and lexicographical
+    /// order (hash#idx). This function will take the raw inputs and apply a
+    /// sort following these requirements.
     pub fn inputs_sorted_set(&self) -> Vec<MultiEraInput> {
         let mut raw = self.inputs();
         raw.sort_by_key(|x| x.lexicographical_key());

pallas-traverse/src/update.rs

@@ -57,7 +57,7 @@ pub type DRepVotingThresholds = conway::DRepVotingThresholds;
 use crate::{Era, MultiEraUpdate};
 
 impl<'b> MultiEraUpdate<'b> {
-    pub fn decode_for_era(era: Era, cbor: &'b [u8]) -> Result<Self, minicbor::decode::Error> {
+    pub fn decode_for_era(era: Era, cbor: &[u8]) -> Result<Self, minicbor::decode::Error> {
         match era {
             Era::Byron => {
                 let (epoch, up) = minicbor::decode(cbor)?;