Re-use order fee rate for close transaction

Cargo.lock

@@ -1426,7 +1426,7 @@ dependencies = [
 [[package]]
 name = "maia"
 version = "0.1.0"
-source = "git+https://github.com/comit-network/maia#baaad94a10291d4e55c3d2cd30f3736035ee10ea"
+source = "git+https://github.com/comit-network/maia#a6846a244131108d93c62167c401e85d87d874bf"
 dependencies = [
  "anyhow",
  "bdk",

daemon/src/collab_settlement_taker.rs

@@ -72,7 +72,7 @@ impl Actor {
 
         let dlc = self.cfd.dlc().context("No DLC in CFD")?;
 
-        let (tx, sig) = dlc.close_transaction(&self.proposal)?;
+        let (tx, sig) = dlc.close_transaction(&self.proposal, self.cfd.order.fee_rate)?;
 
         // Need to use `do_send_async` here because this handler is called in
         // context of a message arriving over the wire, and would result in a

daemon/src/maker_cfd.rs

@@ -865,7 +865,7 @@ where
         let mut cfd = load_cfd_by_order_id(order_id, &mut conn).await?;
         let dlc = cfd.open_dlc().context("CFD was in wrong state")?;
 
-        let (tx, sig_maker) = dlc.close_transaction(proposal)?;
+        let (tx, sig_maker) = dlc.close_transaction(proposal, cfd.order.fee_rate)?;
 
         let own_script_pubkey = dlc.script_pubkey_for(cfd.role());
         cfd.handle_proposal_signed(CollaborativeSettlement::new(

daemon/src/model/cfd.rs

@@ -1445,6 +1445,7 @@ impl Dlc {
     pub fn close_transaction(
         &self,
         proposal: &crate::model::cfd::SettlementProposal,
+        fee_rate: u32,
     ) -> Result<(Transaction, Signature)> {
         let (lock_tx, lock_desc) = &self.lock;
         let (lock_outpoint, lock_amount) = {
@@ -1461,6 +1462,7 @@ impl Dlc {
             lock_amount,
             (&self.maker_address, proposal.maker),
             (&self.taker_address, proposal.taker),
+            fee_rate,
         )
         .context("Unable to collaborative close transaction")?;