SelectorParams mempool policy

examples/synopsis.rs

@@ -143,7 +143,7 @@ fn main() -> anyhow::Result<()> {
                     // For waste optimization when deciding change.
                     change_longterm_feerate: Some(longterm_feerate),
                     change_min_value: None,
-                    change_dust_relay_feerate: None,
+                    dust_relay_feerate: None,
                     // This ensures that we satisfy mempool-replacement policy rules 4 and 6.
                     replace: Some(rbf_params),
                 },

src/input.rs

@@ -510,6 +510,27 @@ impl Input {
     pub fn is_segwit(&self) -> bool {
         self.plan.is_segwit()
     }
+
+    /// Returns the number of witness stack items, if witness data is present.
+    ///
+    /// Returns `None` if this input has no witness data yet (e.g. an unsigned plan-based input).
+    pub fn witness_item_count(&self) -> Option<usize> {
+        // Finalized
+        if let Some(psbt_input) = self.psbt_input() {
+            if let Some(witness) = &psbt_input.final_script_witness {
+                return Some(witness.len());
+            }
+        }
+
+        // Unfinalized
+        if let Some(plan) = self.plan() {
+            if plan.witness_version().is_some() {
+                return Some(plan.witness_template().len());
+            }
+        }
+
+        None
+    }
 }
 
 /// Input group. Cannot be empty.

src/lib.rs

@@ -13,10 +13,13 @@ mod finalizer;
 mod input;
 mod input_candidates;
 mod output;
+mod policy;
 mod rbf;
 mod selection;
 mod selector;
 mod signer;
+#[cfg(test)]
+pub(crate) mod test_utils;
 mod utils;
 
 pub use canonical_unspents::*;
@@ -27,6 +30,7 @@ pub use miniscript;
 pub use miniscript::bitcoin;
 use miniscript::{DefiniteDescriptorKey, Descriptor};
 pub use output::*;
+pub use policy::*;
 pub use rbf::*;
 pub use selection::*;
 pub use selector::*;