diff --git a/cmd/crates/soroban-rpc/src/lib.rs b/cmd/crates/soroban-rpc/src/lib.rs
index 9dac0247d..608c568b5 100644
--- a/cmd/crates/soroban-rpc/src/lib.rs
+++ b/cmd/crates/soroban-rpc/src/lib.rs
@@ -34,6 +34,7 @@ pub use txn::*;
 use soroban_spec_tools::contract;
 
 const VERSION: Option<&str> = option_env!("CARGO_PKG_VERSION");
+pub(crate) const DEFAULT_TRANSACTION_FEES: u32 = 100;
 
 pub type LogEvents = fn(
     footprint: &LedgerFootprint,
@@ -392,6 +393,7 @@ pub struct GetEventsResponse {
 // Reference](https://docs.google.com/document/d/1TZUDgo_3zPz7TiPMMHVW_mtogjLyPL0plvzGMsxSz6A/edit#bookmark=id.35t97rnag3tx)
 // [Code
 // Reference](https://github.com/stellar/soroban-tools/blob/bac1be79e8c2590c9c35ad8a0168aab0ae2b4171/cmd/soroban-rpc/internal/methods/get_events.go#L182-L203)
+#[must_use]
 pub fn does_topic_match(topic: &[String], filter: &[String]) -> bool {
     filter.len() == topic.len()
         && filter
@@ -783,7 +785,7 @@ soroban config identity fund {address} --helper-url <url>"#
         log_events: Option<LogEvents>,
         log_resources: Option<LogResources>,
     ) -> Result<GetTransactionResponse, Error> {
-        let seq_num = txn.sim_res().latest_ledger + 60; //5 min;
+        let seq_num = txn.sim_response().latest_ledger + 60; //5 min;
         let authorized = txn
             .handle_restore(self, source_key, network_passphrase)
             .await?
diff --git a/cmd/crates/soroban-rpc/src/txn.rs b/cmd/crates/soroban-rpc/src/txn.rs
index 1d3d48285..35b0c7192 100644
--- a/cmd/crates/soroban-rpc/src/txn.rs
+++ b/cmd/crates/soroban-rpc/src/txn.rs
@@ -73,7 +73,7 @@ impl Assembled {
         key: &ed25519_dalek::SigningKey,
         network_passphrase: &str,
     ) -> Result<TransactionEnvelope, xdr::Error> {
-        let tx = self.txn();
+        let tx = self.transaction();
         let tx_hash = self.hash(network_passphrase)?;
         let tx_signature = key.sign(&tx_hash);
 
@@ -133,7 +133,7 @@ impl Assembled {
             // Build and submit the restore transaction
             client
                 .send_transaction(
-                    &Assembled::new(&restore(self.txn(), restore_preamble)?, client)
+                    &Assembled::new(&restore(self.transaction(), restore_preamble)?, client)
                         .await?
                         .sign(source_key, network_passphrase)?,
                 )
@@ -145,12 +145,14 @@ impl Assembled {
     }
 
     /// Returns a reference to the original transaction.
-    pub fn txn(&self) -> &Transaction {
+    #[must_use]
+    pub fn transaction(&self) -> &Transaction {
         &self.txn
     }
 
     /// Returns a reference to the simulation response.
-    pub fn sim_res(&self) -> &SimulateTransactionResponse {
+    #[must_use]
+    pub fn sim_response(&self) -> &SimulateTransactionResponse {
         &self.sim_res
     }
 
@@ -165,7 +167,7 @@ impl Assembled {
         network_passphrase: &str,
     ) -> Result<Self, Error> {
         if let Some(txn) = sign_soroban_authorizations(
-            self.txn(),
+            self.transaction(),
             source_key,
             signers,
             seq_num,
@@ -185,7 +187,8 @@ impl Assembled {
 
     ///
     /// # Errors
-    pub fn auth(&self) -> VecM<SorobanAuthorizationEntry> {
+    #[must_use]
+    pub fn auth_entries(&self) -> VecM<SorobanAuthorizationEntry> {
         self.txn
             .operations
             .first()
@@ -216,18 +219,20 @@ impl Assembled {
                 log(resources);
             }
             if let Some(log) = log_events {
-                log(footprint, &[self.auth()], &self.sim_res.events()?);
+                log(footprint, &[self.auth_entries()], &self.sim_res.events()?);
             };
         }
         Ok(())
     }
 
+    #[must_use]
     pub fn requires_auth(&self) -> bool {
         requires_auth(&self.txn).is_some()
     }
 
+    #[must_use]
     pub fn is_view(&self) -> bool {
-        if let TransactionExt::V1(SorobanTransactionData {
+        let TransactionExt::V1(SorobanTransactionData {
             resources:
                 SorobanResources {
                     footprint: LedgerFootprint { read_write, .. },
@@ -235,12 +240,10 @@ impl Assembled {
                 },
             ..
         }) = &self.txn.ext
-        {
-            if read_write.is_empty() {
-                return true;
-            }
-        }
-        false
+        else {
+            return false;
+        };
+        read_write.is_empty()
     }
 
     #[must_use]
@@ -311,7 +314,7 @@ pub fn assemble(
     }
 
     // update the fees of the actual transaction to meet the minimum resource fees.
-    let classic_transaction_fees = 100;
+    let classic_transaction_fees = crate::DEFAULT_TRANSACTION_FEES;
     // Pad the fees up by 15% for a bit of wiggle room.
     tx.fee = (tx.fee.max(
         classic_transaction_fees
diff --git a/cmd/soroban-cli/src/commands/contract/invoke.rs b/cmd/soroban-cli/src/commands/contract/invoke.rs
index 5484f866a..720c3c6f8 100644
--- a/cmd/soroban-cli/src/commands/contract/invoke.rs
+++ b/cmd/soroban-cli/src/commands/contract/invoke.rs
@@ -306,8 +306,8 @@ impl Cmd {
         }
         let (return_value, events) = if self.is_view {
             (
-                txn.sim_res().results()?[0].xdr.clone(),
-                txn.sim_res().events()?,
+                txn.sim_response().results()?[0].xdr.clone(),
+                txn.sim_response().events()?,
             )
         } else {
             let res = client