Fix the Fallback Gas Limiter (#217)

* Add code to disable the fallback gas filler

* Allow benchmarks driver to await tx receipts

* Improve the transaction submission logic

* Update Python Script to process Geth benchmarks

crates/config/src/lib.rs

@@ -375,6 +375,23 @@ pub struct BenchmarkingContext {
     #[arg(short = 'r', long = "default-repetition-count", default_value_t = 1000)]
     pub default_repetition_count: usize,
 
+    /// This transaction controls whether the benchmarking driver should await for transactions to
+    /// be included in a block before moving on to the next transaction in the sequence or not.
+    ///
+    /// This behavior is useful in certain cases and not so useful in others. For example, in some
+    /// repetition block if there's some kind of relationship between txs n and n+1 (for example a
+    /// mint then a transfer) then you would want to wait for the minting to happen and then move on
+    /// to the transfers. On the other hand, if there's no relationship between the transactions n
+    /// and n+1 (e.g., mint and another mint of a different token) then awaiting the first mint to
+    /// be included in a block might not seem necessary.
+    ///
+    /// By default, this behavior is set to false to allow the benchmarking framework to saturate
+    /// the node's mempool as quickly as possible. However, as explained above, there are cases
+    /// where it's needed and certain workloads where failure to provide this argument would lead to
+    /// inaccurate results.
+    #[arg(long)]
+    pub await_transaction_inclusion: bool,
+
     /// Configuration parameters for the corpus files to use.
     #[clap(flatten, next_help_heading = "Corpus Configuration")]
     pub corpus_configuration: CorpusConfiguration,

crates/core/src/differential_benchmarks/driver.rs

@@ -1,6 +1,5 @@
 use std::{
     collections::HashMap,
-    ops::ControlFlow,
     sync::{
         Arc,
         atomic::{AtomicUsize, Ordering},
@@ -13,6 +12,7 @@ use alloy::{
     json_abi::JsonAbi,
     network::{Ethereum, TransactionBuilder},
     primitives::{Address, TxHash, U256},
+    providers::Provider,
     rpc::types::{
         TransactionReceipt, TransactionRequest,
         trace::geth::{
@@ -22,12 +22,9 @@ use alloy::{
     },
 };
 use anyhow::{Context as _, Result, bail};
-use futures::TryFutureExt;
+use futures::{FutureExt as _, TryFutureExt};
 use indexmap::IndexMap;
-use revive_dt_common::{
-    futures::{PollingWaitBehavior, poll},
-    types::PrivateKeyAllocator,
-};
+use revive_dt_common::types::PrivateKeyAllocator;
 use revive_dt_format::{
     metadata::{ContractInstance, ContractPathAndIdent},
     steps::{
@@ -37,7 +34,7 @@ use revive_dt_format::{
     traits::{ResolutionContext, ResolverApi},
 };
 use tokio::sync::{Mutex, OnceCell, mpsc::UnboundedSender};
-use tracing::{Instrument, Span, debug, error, field::display, info, info_span, instrument};
+use tracing::{Span, debug, error, field::display, info, instrument};
 
 use crate::{
     differential_benchmarks::{ExecutionState, WatcherEvent},
@@ -73,6 +70,10 @@ pub struct Driver<'a, I> {
     /// The number of steps that were executed on the driver.
     steps_executed: usize,
 
+    /// This function controls if the driver should wait for transactions to be included in a block
+    /// or not before proceeding forward.
+    await_transaction_inclusion: bool,
+
     /// This is the queue of steps that are to be executed by the driver for this test case. Each
     /// time `execute_step` is called one of the steps is executed.
     steps_iterator: I,
@@ -89,6 +90,7 @@ where
         private_key_allocator: Arc<Mutex<PrivateKeyAllocator>>,
         cached_compiler: &CachedCompiler<'a>,
         watcher_tx: UnboundedSender<WatcherEvent>,
+        await_transaction_inclusion: bool,
         steps: I,
     ) -> Result<Self> {
         let mut this = Driver {
@@ -104,6 +106,7 @@ where
             execution_state: ExecutionState::empty(),
             steps_executed: 0,
             steps_iterator: steps,
+            await_transaction_inclusion,
             watcher_tx,
         };
         this.init_execution_state(cached_compiler)
@@ -166,7 +169,7 @@ where
                 code,
             );
             let receipt = self
-                .execute_transaction(tx, None)
+                .execute_transaction(tx, None, Duration::from_secs(5 * 60))
                 .and_then(|(_, receipt_fut)| receipt_fut)
                 .await
                 .inspect_err(|err| {
@@ -365,7 +368,30 @@ where
                 let tx = step
                     .as_transaction(self.resolver.as_ref(), self.default_resolution_context())
                     .await?;
-                Ok(self.execute_transaction(tx, Some(step_path)).await?.0)
+
+                let (tx_hash, receipt_future) = self
+                    .execute_transaction(tx.clone(), Some(step_path), Duration::from_secs(30 * 60))
+                    .await?;
+                if self.await_transaction_inclusion {
+                    let receipt = receipt_future
+                        .await
+                        .context("Failed while waiting for transaction inclusion in block")?;
+
+                    if !receipt.status() {
+                        error!(
+                            ?tx,
+                            tx.hash = %receipt.transaction_hash,
+                            ?receipt,
+                            "Encountered a failing benchmark transaction"
+                        );
+                        bail!(
+                            "Encountered a failing transaction in benchmarks: {}",
+                            receipt.transaction_hash
+                        )
+                    }
+                }
+
+                Ok(tx_hash)
             }
         }
     }
@@ -466,6 +492,7 @@ where
                         .collect::<Vec<_>>();
                     steps.into_iter()
                 },
+                await_transaction_inclusion: self.await_transaction_inclusion,
                 watcher_tx: self.watcher_tx.clone(),
             })
             .map(|driver| driver.execute_all());
@@ -632,7 +659,7 @@ where
         };
 
         let receipt = match self
-            .execute_transaction(tx, step_path)
+            .execute_transaction(tx, step_path, Duration::from_secs(5 * 60))
             .and_then(|(_, receipt_fut)| receipt_fut)
             .await
         {
@@ -677,18 +704,33 @@ where
     #[instrument(
         level = "info",
         skip_all,
-        fields(driver_id = self.driver_id, transaction_hash = tracing::field::Empty)
+        fields(
+            driver_id = self.driver_id,
+            transaction = ?transaction,
+            transaction_hash = tracing::field::Empty
+        ),
+        err(Debug)
     )]
     async fn execute_transaction(
         &self,
         transaction: TransactionRequest,
         step_path: Option<&StepPath>,
+        receipt_wait_duration: Duration,
     ) -> anyhow::Result<(TxHash, impl Future<Output = Result<TransactionReceipt>>)> {
         let node = self.platform_information.node;
-        let transaction_hash = node
-            .submit_transaction(transaction)
+        let provider = node.provider().await.context("Creating provider failed")?;
+
+        let pending_transaction_builder = provider
+            .send_transaction(transaction)
             .await
             .context("Failed to submit transaction")?;
+
+        let transaction_hash = *pending_transaction_builder.tx_hash();
+        let receipt_future = pending_transaction_builder
+            .with_timeout(Some(receipt_wait_duration))
+            .with_required_confirmations(2)
+            .get_receipt()
+            .map(|res| res.context("Failed to get the receipt of the transaction"));
         Span::current().record("transaction_hash", display(transaction_hash));
 
         info!("Submitted transaction");
@@ -701,28 +743,7 @@ where
                 .context("Failed to send the transaction hash to the watcher")?;
         };
 
-        Ok((transaction_hash, async move {
-            info!("Starting to poll for transaction receipt");
-            poll(
-                Duration::from_secs(30 * 60),
-                PollingWaitBehavior::Constant(Duration::from_secs(1)),
-                || {
-                    async move {
-                        match node.get_receipt(transaction_hash).await {
-                            Ok(receipt) => {
-                                info!("Polling succeeded, receipt found");
-                                Ok(ControlFlow::Break(receipt))
-                            }
-                            Err(_) => Ok(ControlFlow::Continue(())),
-                        }
-                    }
-                    .instrument(info_span!("Polling for receipt"))
-                },
-            )
-            .instrument(info_span!("Polling for receipt", %transaction_hash))
-            .await
-            .inspect(|_| info!("Found the transaction receipt"))
-        }))
+        Ok((transaction_hash, receipt_future))
     }
     // endregion:Transaction Execution
 }

crates/core/src/differential_benchmarks/entry_point.rs

@@ -160,6 +160,7 @@ pub async fn handle_differential_benchmarks(
                 private_key_allocator,
                 cached_compiler.as_ref(),
                 watcher_tx.clone(),
+                context.await_transaction_inclusion,
                 test_definition
                     .case
                     .steps_iterator_for_benchmarks(context.default_repetition_count)

crates/core/src/differential_benchmarks/watcher.rs

@@ -139,23 +139,18 @@ impl Watcher {
                         break;
                     }
 
-                    info!(
-                        block_number = block.ethereum_block_information.block_number,
-                        block_tx_count = block.ethereum_block_information.transaction_hashes.len(),
-                        remaining_transactions = watch_for_transaction_hashes.read().await.len(),
-                        "Observed a block"
-                    );
-
                     // Remove all of the transaction hashes observed in this block from the txs we
                     // are currently watching for.
                     let mut watch_for_transaction_hashes =
                         watch_for_transaction_hashes.write().await;
+                    let mut relevant_transactions_observed = 0;
                     for tx_hash in block.ethereum_block_information.transaction_hashes.iter() {
                         let Some((step_path, submission_time)) =
                             watch_for_transaction_hashes.remove(tx_hash)
                         else {
                             continue;
                         };
+                        relevant_transactions_observed += 1;
                         let transaction_information = TransactionInformation {
                             transaction_hash: *tx_hash,
                             submission_timestamp: submission_time
@@ -172,6 +167,14 @@ impl Watcher {
                             )
                             .expect("Can't fail")
                     }
+
+                    info!(
+                        block_number = block.ethereum_block_information.block_number,
+                        block_tx_count = block.ethereum_block_information.transaction_hashes.len(),
+                        relevant_transactions_observed,
+                        remaining_transactions = watch_for_transaction_hashes.len(),
+                        "Observed a block"
+                    );
                 }
 
                 info!("Watcher's Block Watching Task Finished");

crates/core/src/lib.rs

@@ -91,7 +91,8 @@ impl Platform for GethEvmSolcPlatform {
         let genesis_configuration = AsRef::<GenesisConfiguration>::as_ref(&context);
         let genesis = genesis_configuration.genesis()?.clone();
         Ok(thread::spawn(move || {
-            let node = GethNode::new(context);
+            let use_fallback_gas_filler = matches!(context, Context::Test(..));
+            let node = GethNode::new(context, use_fallback_gas_filler);
             let node = spawn_node::<GethNode>(node, genesis)?;
             Ok(Box::new(node) as Box<_>)
         }))
@@ -145,7 +146,8 @@ impl Platform for LighthouseGethEvmSolcPlatform {
         let genesis_configuration = AsRef::<GenesisConfiguration>::as_ref(&context);
         let genesis = genesis_configuration.genesis()?.clone();
         Ok(thread::spawn(move || {
-            let node = LighthouseGethNode::new(context);
+            let use_fallback_gas_filler = matches!(context, Context::Test(..));
+            let node = LighthouseGethNode::new(context, use_fallback_gas_filler);
             let node = spawn_node::<LighthouseGethNode>(node, genesis)?;
             Ok(Box::new(node) as Box<_>)
         }))
@@ -206,12 +208,14 @@ impl Platform for ReviveDevNodePolkavmResolcPlatform {
 
         let genesis = genesis_configuration.genesis()?.clone();
         Ok(thread::spawn(move || {
+            let use_fallback_gas_filler = matches!(context, Context::Test(..));
             let node = SubstrateNode::new(
                 revive_dev_node_path,
                 SubstrateNode::REVIVE_DEV_NODE_EXPORT_CHAINSPEC_COMMAND,
                 Some(revive_dev_node_consensus),
                 context,
                 &eth_rpc_connection_strings,
+                use_fallback_gas_filler,
             );
             let node = spawn_node(node, genesis)?;
             Ok(Box::new(node) as Box<_>)
@@ -274,12 +278,14 @@ impl Platform for ReviveDevNodeRevmSolcPlatform {
 
         let genesis = genesis_configuration.genesis()?.clone();
         Ok(thread::spawn(move || {
+            let use_fallback_gas_filler = matches!(context, Context::Test(..));
             let node = SubstrateNode::new(
                 revive_dev_node_path,
                 SubstrateNode::REVIVE_DEV_NODE_EXPORT_CHAINSPEC_COMMAND,
                 Some(revive_dev_node_consensus),
                 context,
                 &eth_rpc_connection_strings,
+                use_fallback_gas_filler,
             );
             let node = spawn_node(node, genesis)?;
             Ok(Box::new(node) as Box<_>)
@@ -338,7 +344,9 @@ impl Platform for ZombienetPolkavmResolcPlatform {
             .clone();
         let genesis = genesis_configuration.genesis()?.clone();
         Ok(thread::spawn(move || {
-            let node = ZombienetNode::new(polkadot_parachain_path, context);
+            let use_fallback_gas_filler = matches!(context, Context::Test(..));
+            let node =
+                ZombienetNode::new(polkadot_parachain_path, context, use_fallback_gas_filler);
             let node = spawn_node(node, genesis)?;
             Ok(Box::new(node) as Box<_>)
         }))
@@ -395,7 +403,9 @@ impl Platform for ZombienetRevmSolcPlatform {
             .clone();
         let genesis = genesis_configuration.genesis()?.clone();
         Ok(thread::spawn(move || {
-            let node = ZombienetNode::new(polkadot_parachain_path, context);
+            let use_fallback_gas_filler = matches!(context, Context::Test(..));
+            let node =
+                ZombienetNode::new(polkadot_parachain_path, context, use_fallback_gas_filler);
             let node = spawn_node(node, genesis)?;
             Ok(Box::new(node) as Box<_>)
         }))

crates/node/src/node_implementations/geth.rs

@@ -76,6 +76,7 @@ pub struct GethNode {
     wallet: Arc<EthereumWallet>,
     nonce_manager: CachedNonceManager,
     provider: OnceCell<ConcreteProvider<Ethereum, Arc<EthereumWallet>>>,
+    use_fallback_gas_filler: bool,
 }
 
 impl GethNode {
@@ -100,6 +101,7 @@ impl GethNode {
         + AsRef<WalletConfiguration>
         + AsRef<GethConfiguration>
         + Clone,
+        use_fallback_gas_filler: bool,
     ) -> Self {
         let working_directory_configuration =
             AsRef::<WorkingDirectoryConfiguration>::as_ref(&context);
@@ -126,6 +128,7 @@ impl GethNode {
             wallet: wallet.clone(),
             nonce_manager: Default::default(),
             provider: Default::default(),
+            use_fallback_gas_filler,
         }
     }
 
@@ -246,7 +249,8 @@ impl GethNode {
             .get_or_try_init(|| async move {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.connection_string.as_str(),
-                    FallbackGasFiller::default(),
+                    FallbackGasFiller::default()
+                        .with_use_fallback_gas_filler(self.use_fallback_gas_filler),
                     ChainIdFiller::new(Some(CHAIN_ID)),
                     NonceFiller::new(self.nonce_manager.clone()),
                     self.wallet.clone(),
@@ -742,7 +746,7 @@ mod tests {
 
     fn new_node() -> (TestExecutionContext, GethNode) {
         let context = test_config();
-        let mut node = GethNode::new(&context);
+        let mut node = GethNode::new(&context, true);
         node.init(context.genesis_configuration.genesis().unwrap().clone())
             .expect("Failed to initialize the node")
             .spawn_process()

crates/node/src/node_implementations/lighthouse_geth.rs

@@ -106,6 +106,8 @@ pub struct LighthouseGethNode {
 
     persistent_http_provider: OnceCell<ConcreteProvider<Ethereum, Arc<EthereumWallet>>>,
     persistent_ws_provider: OnceCell<ConcreteProvider<Ethereum, Arc<EthereumWallet>>>,
+
+    use_fallback_gas_filler: bool,
 }
 
 impl LighthouseGethNode {
@@ -127,6 +129,7 @@ impl LighthouseGethNode {
         + AsRef<WalletConfiguration>
         + AsRef<KurtosisConfiguration>
         + Clone,
+        use_fallback_gas_filler: bool,
     ) -> Self {
         let working_directory_configuration =
             AsRef::<WorkingDirectoryConfiguration>::as_ref(&context);
@@ -176,6 +179,7 @@ impl LighthouseGethNode {
             nonce_manager: Default::default(),
             persistent_http_provider: OnceCell::const_new(),
             persistent_ws_provider: OnceCell::const_new(),
+            use_fallback_gas_filler,
         }
     }
 
@@ -374,7 +378,8 @@ impl LighthouseGethNode {
             .get_or_try_init(|| async move {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.ws_connection_string.as_str(),
-                    FallbackGasFiller::default(),
+                    FallbackGasFiller::default()
+                        .with_use_fallback_gas_filler(self.use_fallback_gas_filler),
                     ChainIdFiller::new(Some(CHAIN_ID)),
                     NonceFiller::new(self.nonce_manager.clone()),
                     self.wallet.clone(),
@@ -1152,7 +1157,7 @@ mod tests {
         let _guard = NODE_START_MUTEX.lock().unwrap();
 
         let context = test_config();
-        let mut node = LighthouseGethNode::new(&context);
+        let mut node = LighthouseGethNode::new(&context, true);
         node.init(context.genesis_configuration.genesis().unwrap().clone())
             .expect("Failed to initialize the node")
             .spawn_process()

crates/node/src/node_implementations/substrate.rs

@@ -79,6 +79,7 @@ pub struct SubstrateNode {
     nonce_manager: CachedNonceManager,
     provider: OnceCell<ConcreteProvider<Ethereum, Arc<EthereumWallet>>>,
     consensus: Option<String>,
+    use_fallback_gas_filler: bool,
 }
 
 impl SubstrateNode {
@@ -105,6 +106,7 @@ impl SubstrateNode {
         + AsRef<EthRpcConfiguration>
         + AsRef<WalletConfiguration>,
         existing_connection_strings: &[String],
+        use_fallback_gas_filler: bool,
     ) -> Self {
         let working_directory_path =
             AsRef::<WorkingDirectoryConfiguration>::as_ref(&context).as_path();
@@ -137,6 +139,7 @@ impl SubstrateNode {
             nonce_manager: Default::default(),
             provider: Default::default(),
             consensus,
+            use_fallback_gas_filler,
         }
     }
 
@@ -324,7 +327,12 @@ impl SubstrateNode {
             .get_or_try_init(|| async move {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.rpc_url.as_str(),
-                    FallbackGasFiller::new(u64::MAX, 50_000_000_000, 1_000_000_000),
+                    FallbackGasFiller::new(
+                        u64::MAX,
+                        50_000_000_000,
+                        1_000_000_000,
+                        self.use_fallback_gas_filler,
+                    ),
                     ChainIdFiller::new(Some(CHAIN_ID)),
                     NonceFiller::new(self.nonce_manager.clone()),
                     self.wallet.clone(),
@@ -825,6 +833,7 @@ mod tests {
             None,
             &context,
             &[],
+            true,
         );
         node.init(context.genesis_configuration.genesis().unwrap().clone())
             .expect("Failed to initialize the node")
@@ -896,6 +905,7 @@ mod tests {
             None,
             &context,
             &[],
+            true,
         );
 
         // Call `init()`

crates/node/src/node_implementations/zombienet.rs

@@ -114,6 +114,8 @@ pub struct ZombienetNode {
     nonce_manager: CachedNonceManager,
 
     provider: OnceCell<ConcreteProvider<Ethereum, Arc<EthereumWallet>>>,
+
+    use_fallback_gas_filler: bool,
 }
 
 impl ZombienetNode {
@@ -137,6 +139,7 @@ impl ZombienetNode {
         context: impl AsRef<WorkingDirectoryConfiguration>
         + AsRef<EthRpcConfiguration>
         + AsRef<WalletConfiguration>,
+        use_fallback_gas_filler: bool,
     ) -> Self {
         let eth_proxy_binary = AsRef::<EthRpcConfiguration>::as_ref(&context)
             .path
@@ -164,6 +167,7 @@ impl ZombienetNode {
             connection_string: String::new(),
             node_rpc_port: None,
             provider: Default::default(),
+            use_fallback_gas_filler,
         }
     }
 
@@ -330,7 +334,12 @@ impl ZombienetNode {
             .get_or_try_init(|| async move {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.connection_string.as_str(),
-                    FallbackGasFiller::new(u64::MAX, 5_000_000_000, 1_000_000_000),
+                    FallbackGasFiller::new(
+                        u64::MAX,
+                        5_000_000_000,
+                        1_000_000_000,
+                        self.use_fallback_gas_filler,
+                    ),
                     ChainIdFiller::default(), // TODO: use CHAIN_ID constant
                     NonceFiller::new(self.nonce_manager.clone()),
                     self.wallet.clone(),
@@ -823,6 +832,7 @@ mod tests {
             let mut node = ZombienetNode::new(
                 context.polkadot_parachain_configuration.path.clone(),
                 &context,
+                true,
             );
             let genesis = context.genesis_configuration.genesis().unwrap().clone();
             node.init(genesis).unwrap();
@@ -936,6 +946,7 @@ mod tests {
         let node = ZombienetNode::new(
             context.polkadot_parachain_configuration.path.clone(),
             &context,
+            true,
         );
 
         // Act
@@ -956,6 +967,7 @@ mod tests {
         let node = ZombienetNode::new(
             context.polkadot_parachain_configuration.path.clone(),
             &context,
+            true,
         );
 
         // Act

crates/node/src/provider_utils/fallback_gas_filler.rs

@@ -4,7 +4,7 @@ use alloy::{
         Provider, SendableTx,
         fillers::{GasFiller, TxFiller},
     },
-    transports::TransportResult,
+    transports::{TransportError, TransportResult},
 };
 
 // Percentage padding applied to estimated gas (e.g. 120 = 20% padding)
@@ -17,6 +17,7 @@ pub struct FallbackGasFiller {
     default_gas_limit: u64,
     default_max_fee_per_gas: u128,
     default_priority_fee: u128,
+    use_fallback_gas_filler: bool,
 }
 
 impl FallbackGasFiller {
@@ -24,19 +25,41 @@ impl FallbackGasFiller {
         default_gas_limit: u64,
         default_max_fee_per_gas: u128,
         default_priority_fee: u128,
+        use_fallback_gas_filler: bool,
     ) -> Self {
         Self {
             inner: GasFiller,
             default_gas_limit,
             default_max_fee_per_gas,
             default_priority_fee,
+            use_fallback_gas_filler,
         }
     }
+
+    pub fn with_default_gas_limit(mut self, default_gas_limit: u64) -> Self {
+        self.default_gas_limit = default_gas_limit;
+        self
+    }
+
+    pub fn with_default_max_fee_per_gas(mut self, default_max_fee_per_gas: u128) -> Self {
+        self.default_max_fee_per_gas = default_max_fee_per_gas;
+        self
+    }
+
+    pub fn with_default_priority_fee(mut self, default_priority_fee: u128) -> Self {
+        self.default_priority_fee = default_priority_fee;
+        self
+    }
+
+    pub fn with_use_fallback_gas_filler(mut self, use_fallback_gas_filler: bool) -> Self {
+        self.use_fallback_gas_filler = use_fallback_gas_filler;
+        self
+    }
 }
 
 impl Default for FallbackGasFiller {
     fn default() -> Self {
-        FallbackGasFiller::new(25_000_000, 1_000_000_000, 1_000_000_000)
+        FallbackGasFiller::new(25_000_000, 1_000_000_000, 1_000_000_000, true)
     }
 }
 
@@ -64,7 +87,12 @@ where
             Ok(fill) => Ok(Some(fill)),
             Err(err) => {
                 tracing::debug!(error = ?err, "Gas Provider Estimation Failed, using fallback");
-                Ok(None)
+
+                if !self.use_fallback_gas_filler {
+                    Err(err)
+                } else {
+                    Ok(None)
+                }
             }
         }
     }
@@ -86,13 +114,17 @@ where
                 }
             }
             Ok(tx)
-        } else {
+        } else if self.use_fallback_gas_filler {
             if let Some(builder) = tx.as_mut_builder() {
                 builder.set_gas_limit(self.default_gas_limit);
                 builder.set_max_fee_per_gas(self.default_max_fee_per_gas);
                 builder.set_max_priority_fee_per_gas(self.default_priority_fee);
             }
             Ok(tx)
+        } else {
+            Err(TransportError::UnsupportedFeature(
+                "Fallback gas filler is disabled and we're attempting to do a gas estimate on a failing transaction",
+            ))
         }
     }
 }