Update the FallbackGasFiller implementation

crates/core/src/main.rs

@@ -4,7 +4,6 @@ mod helpers;
 
 use anyhow::{Context as _, bail};
 use clap::Parser;
-use revive_dt_common::types::ParsedTestSpecifier;
 use revive_dt_report::{ReportAggregator, TestCaseStatus};
 use schemars::schema_for;
 use tracing::{info, level_filters::LevelFilter};
@@ -64,40 +63,15 @@ fn main() -> anyhow::Result<()> {
                 )
                 .await?;
 
-                // Error out if there are any failing tests.
+                let contains_failure = report
-                let failures = report
                     .execution_information
-                    .into_iter()
+                    .values()
-                    .flat_map(|(metadata_file_path, metadata_file_report)| {
+                    .flat_map(|values| values.case_reports.values())
-                        metadata_file_report.case_reports.into_iter().flat_map(
+                    .flat_map(|values| values.mode_execution_reports.values())
-                            move |(case_idx, case_report)| {
+                    .any(|report| matches!(report.status, Some(TestCaseStatus::Failed { .. })));
-                                let metadata_file_path = metadata_file_path.clone();
-                                case_report.mode_execution_reports.into_iter().filter_map(
-                                    move |(mode, execution_report)| {
-                                        if let Some(TestCaseStatus::Failed { reason }) =
-                                            execution_report.status
-                                        {
-                                            let parsed_test_specifier =
-                                                ParsedTestSpecifier::CaseWithMode {
-                                                    metadata_file_path: metadata_file_path
-                                                        .clone()
-                                                        .into_inner(),
-                                                    case_idx: case_idx.into_inner(),
-                                                    mode,
-                                                };
-                                            Some((parsed_test_specifier, reason))
-                                        } else {
-                                            None
-                                        }
-                                    },
-                                )
-                            },
-                        )
-                    })
-                    .collect::<Vec<_>>();
 
-                if !failures.is_empty() {
+                if contains_failure {
-                    bail!("Some tests failed: {failures:#?}")
+                    bail!("Some tests failed")
                 }
 
                 Ok(())
@@ -117,40 +91,15 @@ fn main() -> anyhow::Result<()> {
                 )
                 .await?;
 
-                // Error out if there are any failing tests.
+                let contains_failure = report
-                let failures = report
                     .execution_information
-                    .into_iter()
+                    .values()
-                    .flat_map(|(metadata_file_path, metadata_file_report)| {
+                    .flat_map(|values| values.case_reports.values())
-                        metadata_file_report.case_reports.into_iter().flat_map(
+                    .flat_map(|values| values.mode_execution_reports.values())
-                            move |(case_idx, case_report)| {
+                    .any(|report| matches!(report.status, Some(TestCaseStatus::Failed { .. })));
-                                let metadata_file_path = metadata_file_path.clone();
-                                case_report.mode_execution_reports.into_iter().filter_map(
-                                    move |(mode, execution_report)| {
-                                        if let Some(TestCaseStatus::Failed { reason }) =
-                                            execution_report.status
-                                        {
-                                            let parsed_test_specifier =
-                                                ParsedTestSpecifier::CaseWithMode {
-                                                    metadata_file_path: metadata_file_path
-                                                        .clone()
-                                                        .into_inner(),
-                                                    case_idx: case_idx.into_inner(),
-                                                    mode,
-                                                };
-                                            Some((parsed_test_specifier, reason))
-                                        } else {
-                                            None
-                                        }
-                                    },
-                                )
-                            },
-                        )
-                    })
-                    .collect::<Vec<_>>();
 
-                if !failures.is_empty() {
+                if contains_failure {
-                    bail!("Some tests failed: {failures:#?}")
+                    bail!("Some benchmarks failed")
                 }
 
                 Ok(())

crates/node/src/node_implementations/geth.rs

@@ -250,7 +250,7 @@ impl GethNode {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.connection_string.as_str(),
                     FallbackGasFiller::default()
-                        .with_use_fallback_gas_filler(self.use_fallback_gas_filler),
+                        .with_fallback_mechanism(self.use_fallback_gas_filler),
                     ChainIdFiller::new(Some(CHAIN_ID)),
                     NonceFiller::new(self.nonce_manager.clone()),
                     self.wallet.clone(),

crates/node/src/node_implementations/lighthouse_geth.rs

@@ -379,7 +379,7 @@ impl LighthouseGethNode {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.ws_connection_string.as_str(),
                     FallbackGasFiller::default()
-                        .with_use_fallback_gas_filler(self.use_fallback_gas_filler),
+                        .with_fallback_mechanism(self.use_fallback_gas_filler),
                     ChainIdFiller::new(Some(CHAIN_ID)),
                     NonceFiller::new(self.nonce_manager.clone()),
                     self.wallet.clone(),

crates/node/src/node_implementations/substrate.rs

@@ -47,7 +47,7 @@ use tracing::{instrument, trace};
 
 use crate::{
     Node,
-    constants::{CHAIN_ID, INITIAL_BALANCE},
+    constants::INITIAL_BALANCE,
     helpers::{Process, ProcessReadinessWaitBehavior},
     provider_utils::{
         ConcreteProvider, FallbackGasFiller, construct_concurrency_limited_provider,
@@ -327,13 +327,9 @@ impl SubstrateNode {
             .get_or_try_init(|| async move {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.rpc_url.as_str(),
-                    FallbackGasFiller::new(
+                    FallbackGasFiller::default()
-                        u64::MAX,
+                        .with_fallback_mechanism(self.use_fallback_gas_filler),
-                        50_000_000_000,
+                    ChainIdFiller::default(),
-                        1_000_000_000,
-                        self.use_fallback_gas_filler,
-                    ),
-                    ChainIdFiller::new(Some(CHAIN_ID)),
                     NonceFiller::new(self.nonce_manager.clone()),
                     self.wallet.clone(),
                 )

crates/node/src/node_implementations/zombienet.rs

@@ -334,12 +334,8 @@ impl ZombienetNode {
             .get_or_try_init(|| async move {
                 construct_concurrency_limited_provider::<Ethereum, _>(
                     self.connection_string.as_str(),
-                    FallbackGasFiller::new(
+                    FallbackGasFiller::default()
-                        u64::MAX,
+                        .with_fallback_mechanism(self.use_fallback_gas_filler),
-                        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(),

crates/node/src/provider_utils/fallback_gas_filler.rs

@@ -1,65 +1,71 @@
+use std::{borrow::Cow, fmt::Display};
+
 use alloy::{
+    eips::BlockNumberOrTag,
     network::{Network, TransactionBuilder},
     providers::{
         Provider, SendableTx,
-        fillers::{GasFiller, TxFiller},
+        ext::DebugApi,
+        fillers::{GasFillable, GasFiller, TxFiller},
     },
-    transports::{TransportError, TransportResult},
+    rpc::types::trace::geth::{
+        GethDebugBuiltInTracerType, GethDebugTracerType, GethDebugTracingCallOptions,
+        GethDebugTracingOptions,
+    },
+    transports::{RpcError, TransportResult},
 };
 
-// Percentage padding applied to estimated gas (e.g. 120 = 20% padding)
+/// An implementation of [`GasFiller`] with a fallback mechanism for reverting  transactions.
-const GAS_ESTIMATE_PADDING_NUMERATOR: u64 = 120;
+///
-const GAS_ESTIMATE_PADDING_DENOMINATOR: u64 = 100;
+/// This struct provides a fallback mechanism for alloy's [`GasFiller`] which  kicks in when a
-
+/// transaction's dry run fails due to it reverting allowing us to get gas estimates even for
-#[derive(Clone, Debug)]
+/// failing transactions. In this codebase, this  is very important since the MatterLabs tests
+/// expect some transactions in the test suite revert. Since we're expected to run a number of
+/// assertions on these reverting transactions we must commit them to the ledger.
+///
+/// Therefore, this struct does the following:
+///
+/// 1. It first attempts to estimate the gas through the mechanism implemented in the [`GasFiller`].
+/// 2. If it fails, then we perform a debug trace of the transaction to find  out how much gas the
+///    transaction needs until it reverts.
+/// 3. We fill in these values (either the success or failure case) into the transaction.
+///
+/// The fallback mechanism of this filler can be completely disabled if we don't want it to be used.
+/// In that case, this gas filler will act in an identical  way to alloy's [`GasFiller`].
+///
+/// We then fill in these values into the transaction.
+///
+/// The previous implementation of this fallback gas filler relied on making use of default values
+/// for the gas limit in order to be able to submit the reverting transactions to the network. But,
+/// it introduced a number of issues that we weren't anticipating at the time when it was built.
+#[derive(Clone, Copy, Debug)]
 pub struct FallbackGasFiller {
+    /// The inner [`GasFiller`] which we pass all of the calls to in the happy path.
     inner: GasFiller,
-    default_gas_limit: u64,
+
-    default_max_fee_per_gas: u128,
+    /// A [`bool`] that controls if the fallback mechanism is enabled or not.
-    default_priority_fee: u128,
+    enable_fallback_mechanism: bool,
-    use_fallback_gas_filler: bool,
 }
 
 impl FallbackGasFiller {
-    pub fn new(
+    pub fn new() -> Self {
-        default_gas_limit: u64,
-        default_max_fee_per_gas: u128,
-        default_priority_fee: u128,
-        use_fallback_gas_filler: bool,
-    ) -> Self {
         Self {
-            inner: GasFiller,
+            inner: Default::default(),
-            default_gas_limit,
+            enable_fallback_mechanism: true,
-            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 {
+    pub fn with_fallback_mechanism(mut self, enable: bool) -> Self {
-        self.default_gas_limit = default_gas_limit;
+        self.enable_fallback_mechanism = enable;
         self
     }
 
-    pub fn with_default_max_fee_per_gas(mut self, default_max_fee_per_gas: u128) -> Self {
+    pub fn with_fallback_mechanism_enabled(self) -> Self {
-        self.default_max_fee_per_gas = default_max_fee_per_gas;
+        self.with_fallback_mechanism(true)
-        self
     }
 
-    pub fn with_default_priority_fee(mut self, default_priority_fee: u128) -> Self {
+    pub fn with_fallback_mechanism_disabled(self) -> Self {
-        self.default_priority_fee = default_priority_fee;
+        self.with_fallback_mechanism(false)
-        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, true)
     }
 }
 
@@ -67,32 +73,89 @@ impl<N> TxFiller<N> for FallbackGasFiller
 where
     N: Network,
 {
-    type Fillable = Option<<GasFiller as TxFiller<N>>::Fillable>;
+    type Fillable = <GasFiller as TxFiller<N>>::Fillable;
 
     fn status(
         &self,
         tx: &<N as Network>::TransactionRequest,
     ) -> alloy::providers::fillers::FillerControlFlow {
-        <GasFiller as TxFiller<N>>::status(&self.inner, tx)
+        TxFiller::<N>::status(&self.inner, tx)
     }
 
-    fn fill_sync(&self, _: &mut alloy::providers::SendableTx<N>) {}
+    fn fill_sync(&self, _: &mut SendableTx<N>) {}
 
     async fn prepare<P: Provider<N>>(
         &self,
         provider: &P,
         tx: &<N as Network>::TransactionRequest,
     ) -> TransportResult<Self::Fillable> {
-        match self.inner.prepare(provider, tx).await {
+        match (
-            Ok(fill) => Ok(Some(fill)),
+            self.inner.prepare(provider, tx).await,
-            Err(err) => {
+            self.enable_fallback_mechanism,
-                tracing::debug!(error = ?err, "Gas Provider Estimation Failed, using fallback");
+        ) {
+            // Return the same thing if either this calls succeeds, or if the call falls and the
+            // fallback mechanism is disabled.
+            (rtn @ Ok(..), ..) | (rtn @ Err(..), false) => rtn,
+            (Err(..), true) => {
+                // Perform a trace of the transaction.
+                let trace = provider
+                    .debug_trace_call(
+                        tx.clone(),
+                        BlockNumberOrTag::Latest.into(),
+                        GethDebugTracingCallOptions {
+                            tracing_options: GethDebugTracingOptions {
+                                tracer: Some(GethDebugTracerType::BuiltInTracer(
+                                    GethDebugBuiltInTracerType::CallTracer,
+                                )),
+                                ..Default::default()
+                            },
+                            state_overrides: Default::default(),
+                            block_overrides: Default::default(),
+                        },
+                    )
+                    .await?
+                    .try_into_call_frame()
+                    .map_err(|err| {
+                        RpcError::LocalUsageError(
+                            FallbackGasFillerError::new(format!(
+                                "Expected a callframe trace, but got: {err:?}"
+                            ))
+                            .boxed(),
+                        )
+                    })?;
 
-                if !self.use_fallback_gas_filler {
+                let gas_used = u64::try_from(trace.gas_used).map_err(|_| {
-                    Err(err)
+                    RpcError::LocalUsageError(
-                } else {
+                        FallbackGasFillerError::new(
-                    Ok(None)
+                            "Transaction trace returned a value of gas used that exceeds u64",
+                        )
+                        .boxed(),
+                    )
+                })?;
+                let gas_limit = gas_used.saturating_mul(120) / 100;
+
+                if let Some(gas_price) = tx.gas_price() {
+                    return Ok(GasFillable::Legacy {
+                        gas_limit,
+                        gas_price,
+                    });
                 }
+
+                let estimate = if let (Some(max_fee_per_gas), Some(max_priority_fee_per_gas)) =
+                    (tx.max_fee_per_gas(), tx.max_priority_fee_per_gas())
+                {
+                    alloy::eips::eip1559::Eip1559Estimation {
+                        max_fee_per_gas,
+                        max_priority_fee_per_gas,
+                    }
+                } else {
+                    provider.estimate_eip1559_fees().await?
+                };
+
+                Ok(GasFillable::Eip1559 {
+                    gas_limit,
+                    estimate,
+                })
             }
         }
     }
@@ -100,31 +163,35 @@ where
     async fn fill(
         &self,
         fillable: Self::Fillable,
-        mut tx: alloy::providers::SendableTx<N>,
+        tx: SendableTx<N>,
     ) -> TransportResult<SendableTx<N>> {
-        if let Some(fill) = fillable {
+        self.inner.fill(fillable, tx).await
-            let mut tx = self.inner.fill(fill, tx).await?;
-            if let Some(builder) = tx.as_mut_builder() {
-                if let Some(estimated) = builder.gas_limit() {
-                    let padded = estimated
-                        .checked_mul(GAS_ESTIMATE_PADDING_NUMERATOR)
-                        .and_then(|v| v.checked_div(GAS_ESTIMATE_PADDING_DENOMINATOR))
-                        .unwrap_or(u64::MAX);
-                    builder.set_gas_limit(padded);
     }
 }
-            Ok(tx)
+
-        } else if self.use_fallback_gas_filler {
+impl Default for FallbackGasFiller {
-            if let Some(builder) = tx.as_mut_builder() {
+    fn default() -> Self {
-                builder.set_gas_limit(self.default_gas_limit);
+        Self::new()
-                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",
-            ))
     }
 }
+
+#[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
+struct FallbackGasFillerError(Cow<'static, str>);
+
+impl FallbackGasFillerError {
+    pub fn new(string: impl Into<Cow<'static, str>>) -> Self {
+        Self(string.into())
     }
+
+    pub fn boxed(self) -> Box<Self> {
+        Box::new(self)
+    }
+}
+
+impl Display for FallbackGasFillerError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        Display::fmt(&self.0, f)
+    }
+}
+
+impl std::error::Error for FallbackGasFillerError {}