Autobump fixes & max expiration ledger enforcement.

soroban-env-host/src/auth.rs

@@ -1465,8 +1465,7 @@ impl AccountAuthorizationTracker {
         }
         self.need_nonce = false;
         if let Some((nonce, expiration_ledger)) = &self.nonce {
-            let (ledger_seq, max_entry_expiration) =
-                host.with_ledger_info(|li| Ok((li.sequence_number, li.max_entry_expiration)))?;
+            let ledger_seq = host.with_ledger_info(|li| Ok(li.sequence_number))?;
             if ledger_seq > *expiration_ledger {
                 return Err(host.err(
                     ScErrorType::Auth,
@@ -1478,17 +1477,14 @@ impl AccountAuthorizationTracker {
                     ],
                 ));
             }
-            if *expiration_ledger
-                > ledger_seq
-                    .saturating_sub(1)
-                    .saturating_add(max_entry_expiration)
-            {
+            let max_expiration_ledger = host.max_expiration_ledger()?;
+            if *expiration_ledger > max_expiration_ledger {
                 return Err(host.err(
                     ScErrorType::Auth,
                     ScErrorCode::InvalidInput,
                     "signature expiration is too late",
                     &[
-                        (ledger_seq + max_entry_expiration).try_into_val(host)?,
+                        max_expiration_ledger.try_into_val(host)?,
                         expiration_ledger.try_into_val(host)?,
                     ],
                 ));

soroban-env-host/src/host.rs

@@ -35,7 +35,7 @@ pub(crate) mod declared_size;
 pub(crate) mod error;
 pub(crate) mod frame;
 pub(crate) mod invoker_type;
-mod ledger_info_helper;
+pub(crate) mod ledger_info_helper;
 mod mem_helper;
 pub(crate) mod metered_clone;
 pub(crate) mod metered_map;
@@ -431,7 +431,6 @@ impl Host {
     /// caller as a tuple wrapped in `Ok(...)`.
     pub fn try_finish(self) -> Result<(Storage, Budget, Events), HostError> {
         let events = self.try_borrow_events()?.externalize(&self)?;
-        self.maybe_autobump_expiration()?;
         Rc::try_unwrap(self.0)
             .map(|host_impl| {
                 let storage = host_impl.storage.into_inner();
@@ -888,7 +887,11 @@ impl Host {
                 LedgerKey::ContractData(_) | LedgerKey::ContractCode(_) => {
                     if self.try_borrow_storage_mut()?.has(key, self.budget_ref())? {
                         self.try_borrow_storage_mut()?
-                            .bump(self, key.clone(), autobump_ledgers)?;
+                            .bump_relative_to_entry_expiration(
+                                self,
+                                key.clone(),
+                                autobump_ledgers,
+                            )?;
                     }
                 }
                 _ => (),

soroban-env-host/src/host/frame.rs

@@ -653,6 +653,9 @@ impl Host {
 
     // Notes on metering: covered by the called components.
     fn invoke_function_raw(&self, hf: HostFunction) -> Result<Val, HostError> {
+        // Autobump expiration ledger of the footprint, in case if autobump is
+        // enabled.
+        self.maybe_autobump_expiration()?;
         let hf_type = hf.discriminant();
         match hf {
             HostFunction::InvokeContract(invoke_args) => {

soroban-env-host/src/host/ledger_info_helper.rs

@@ -1,4 +1,4 @@
-use soroban_env_common::xdr::ContractDataDurability;
+use soroban_env_common::xdr::{ContractDataDurability, LedgerEntry, LedgerEntryData, LedgerKey};
 
 use crate::{Host, HostError, LedgerInfo};
 
@@ -16,6 +16,44 @@ impl Host {
                 self.with_ledger_info(|li: &LedgerInfo| Ok(li.min_persistent_entry_expiration))?
             }
         };
-        Ok(ledger_seq.saturating_add(min_expiration).saturating_sub(1))
+        Ok(ledger_seq.saturating_add(min_expiration.saturating_sub(1)))
+    }
+
+    pub(crate) fn max_expiration_ledger(&self) -> Result<u32, HostError> {
+        self.with_ledger_info(|li| {
+            Ok(li
+                .sequence_number
+                // Entry can live for at most max_entry_expiration ledgers from
+                // now, counting the current one.
+                .saturating_add(li.max_entry_expiration.saturating_sub(1)))
+        })
+    }
+}
+
+pub fn get_entry_expiration(entry: &LedgerEntry) -> Option<u32> {
+    match &entry.data {
+        LedgerEntryData::ContractData(d) => Some(d.expiration_ledger_seq),
+        LedgerEntryData::ContractCode(c) => Some(c.expiration_ledger_seq),
+        _ => None,
+    }
+}
+
+pub fn set_entry_expiration(entry: &mut LedgerEntry, new_expiration: u32) {
+    match &mut entry.data {
+        LedgerEntryData::ContractData(data) => {
+            data.expiration_ledger_seq = new_expiration;
+        }
+        LedgerEntryData::ContractCode(code) => {
+            code.expiration_ledger_seq = new_expiration;
+        }
+        _ => (),
+    }
+}
+
+pub fn get_key_durability(key: &LedgerKey) -> Option<ContractDataDurability> {
+    match &key {
+        LedgerKey::ContractData(d) => Some(d.durability),
+        LedgerKey::ContractCode(_) => Some(ContractDataDurability::Persistent),
+        _ => None,
     }
 }

soroban-env-host/src/native_contract/token/allowance.rs

@@ -37,11 +37,7 @@ pub fn write_allowance(
     // validates the expiration and then returns the ledger seq
     // The expiration can be less than ledger seq if clearing an allowance
     let ledger_seq = e.with_ledger_info(|li| {
-        if expiration
-            > li.sequence_number
-                .saturating_add(li.max_entry_expiration)
-                .saturating_sub(1)
-        {
+        if expiration > e.max_expiration_ledger()? {
             Err(err!(
                 e,
                 ContractError::AllowanceError,

soroban-env-host/src/storage.rs

@@ -7,12 +7,14 @@
 //!   - [Env::put_contract_data](crate::Env::put_contract_data)
 //!   - [Env::del_contract_data](crate::Env::del_contract_data)
 
+use std::cmp::min;
 use std::rc::Rc;
 
-use soroban_env_common::xdr::{LedgerEntryData, ScErrorCode, ScErrorType};
+use soroban_env_common::xdr::{ScErrorCode, ScErrorType};
 use soroban_env_common::{Compare, Val};
 
 use crate::budget::Budget;
+use crate::host::ledger_info_helper::{get_entry_expiration, set_entry_expiration};
 use crate::host::metered_clone::MeteredClone;
 use crate::xdr::{LedgerEntry, LedgerKey};
 use crate::Host;
@@ -38,7 +40,7 @@ impl InstanceStorageMap {
 /// A helper type used by [Footprint] to designate which ways
 /// a given [LedgerKey] is accessed, or is allowed to be accessed,
 /// in a given transaction.
-#[derive(Clone, Debug, Eq, PartialEq, Ord, PartialOrd)]
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Ord, PartialOrd)]
 pub enum AccessType {
     /// When in [FootprintMode::Recording], indicates that the [LedgerKey] is only read.
     /// When in [FootprintMode::Enforcing], indicates that the [LedgerKey] is only _allowed_ to be read.
@@ -322,39 +324,70 @@ impl Storage {
         bump_by_ledgers: u32,
     ) -> Result<(), HostError> {
         let _span = tracy_span!("bump key");
-        let new_expiration = host.with_ledger_info(|li| {
-            Ok(li
-                .sequence_number
-                .saturating_add(bump_by_ledgers)
-                .min(li.max_entry_expiration))
+        let new_expiration = host
+            .with_ledger_info(|li| Ok(li.sequence_number.saturating_add(bump_by_ledgers)))?
+            .min(host.max_expiration_ledger()?);
+        // Bumping deleted/non-existing/out-of-footprint entries will result in
+        // an error.
+        let old_entry = self.get(&key, host.budget_ref())?;
+        let old_expiration = get_entry_expiration(old_entry.as_ref()).ok_or_else(|| {
+            host.err(
+                ScErrorType::Storage,
+                ScErrorCode::InternalError,
+                "trying to bump non-expirable entry",
+                &[],
+            )
         })?;
+
+        if new_expiration > old_expiration {
+            let mut new_entry = (*old_entry).metered_clone(host.budget_ref())?;
+            set_entry_expiration(&mut new_entry, new_expiration);
+            self.map = self
+                .map
+                .insert(key, Some(Rc::new(new_entry)), host.budget_ref())?;
+        }
+        Ok(())
+    }
+
+    /// Bumps `key` to live for at least `bump_by_ledgers` from the current
+    /// expiration of the entry.
+    ///
+    /// This should only be used for internal autobumps.
+    ///  
+    /// This operation is only defined within a host as it relies on ledger
+    /// state.
+    ///
+    /// This is always considered a 'read-only' operation, even though it might
+    /// modify the internal storage state.
+    pub(crate) fn bump_relative_to_entry_expiration(
+        &mut self,
+        host: &Host,
+        key: Rc<LedgerKey>,
+        bump_by_ledgers: u32,
+    ) -> Result<(), HostError> {
+        let _span = tracy_span!("bump key relative");
         // Bumping deleted/non-existing/out-of-footprint entries will result in
         // an error.
         let old_entry = self.get(&key, host.budget_ref())?;
-        let old_expiration = match &old_entry.data {
-            LedgerEntryData::ContractData(d) => d.expiration_ledger_seq,
-            LedgerEntryData::ContractCode(c) => c.expiration_ledger_seq,
-            _ => {
-                return Err(host.err(
-                    ScErrorType::Storage,
-                    ScErrorCode::InternalError,
-                    "trying to bump unexpected ledger entry type",
-                    &[],
-                ));
-            }
-        };
+        let old_expiration = get_entry_expiration(old_entry.as_ref()).ok_or_else(|| {
+            host.err(
+                ScErrorType::Storage,
+                ScErrorCode::InternalError,
+                "trying to bump non-expirable entry",
+                &[],
+            )
+        })?;
+        let new_expiration = min(
+            old_expiration.saturating_add(bump_by_ledgers),
+            host.max_expiration_ledger()?,
+        );
 
         if new_expiration > old_expiration {
             let mut new_entry = (*old_entry).metered_clone(host.budget_ref())?;
-            match &mut new_entry.data {
-                LedgerEntryData::ContractData(data) => {
-                    data.expiration_ledger_seq = new_expiration;
-                }
-                LedgerEntryData::ContractCode(code) => {
-                    code.expiration_ledger_seq = new_expiration;
-                }
-                _ => (),
-            }
+            set_entry_expiration(
+                &mut new_entry,
+                old_expiration.saturating_add(bump_by_ledgers),
+            );
             self.map = self
                 .map
                 .insert(key, Some(Rc::new(new_entry)), host.budget_ref())?;