diff --git a/crates/starknet_batcher/src/batcher.rs b/crates/starknet_batcher/src/batcher.rs
index 0ffcc0fb62..b42a92c3e0 100644
--- a/crates/starknet_batcher/src/batcher.rs
+++ b/crates/starknet_batcher/src/batcher.rs
@@ -41,8 +41,8 @@ use crate::block_builder::{
 use crate::config::BatcherConfig;
 use crate::proposal_manager::{
     GenerateProposalError,
-    GetProposalResultError,
     InternalProposalStatus,
+    ProposalError,
     ProposalManager,
     ProposalManagerTrait,
     ProposalOutput,
@@ -280,13 +280,13 @@ impl Batcher {
         self.close_input_transaction_stream(proposal_id)?;
 
         let response = match self.proposal_manager.await_proposal_commitment(proposal_id).await {
-            Ok(proposal_commitment) => ProposalStatus::Finished(proposal_commitment),
-            Err(GetProposalResultError::BlockBuilderError(err)) => match err.as_ref() {
+            Some(Ok(proposal_commitment)) => ProposalStatus::Finished(proposal_commitment),
+            Some(Err(ProposalError::BlockBuilderError(err))) => match err.as_ref() {
                 BlockBuilderError::FailOnError(_) => ProposalStatus::InvalidProposal,
                 _ => return Err(BatcherError::InternalError),
             },
-            Err(GetProposalResultError::ProposalDoesNotExist { proposal_id: _ })
-            | Err(GetProposalResultError::Aborted) => {
+            Some(Err(ProposalError::Aborted)) => return Err(BatcherError::ProposalAborted),
+            None => {
                 panic!("Proposal {} should exist in the proposal manager.", proposal_id)
             }
         };
@@ -327,8 +327,11 @@ impl Batcher {
         // TODO: Consider removing the proposal from the proposal manager and keep it in the batcher
         // for decision reached.
         self.propose_tx_streams.remove(&proposal_id);
-        let proposal_commitment =
-            self.proposal_manager.await_proposal_commitment(proposal_id).await?;
+        let proposal_commitment = self
+            .proposal_manager
+            .await_proposal_commitment(proposal_id)
+            .await
+            .ok_or(BatcherError::ProposalNotFound { proposal_id })??;
         Ok(GetProposalContentResponse {
             content: GetProposalContent::Finished(proposal_commitment),
         })
@@ -337,7 +340,11 @@ impl Batcher {
     #[instrument(skip(self), err)]
     pub async fn decision_reached(&mut self, input: DecisionReachedInput) -> BatcherResult<()> {
         let proposal_id = input.proposal_id;
-        let proposal_output = self.proposal_manager.take_proposal_result(proposal_id).await?;
+        let proposal_output = self
+            .proposal_manager
+            .take_proposal_result(proposal_id)
+            .await
+            .ok_or(BatcherError::ExecutedProposalNotFound { proposal_id })??;
         let ProposalOutput { state_diff, nonces: address_to_nonce, tx_hashes, .. } =
             proposal_output;
         // TODO: Keep the height from start_height or get it from the input.
@@ -437,14 +444,11 @@ impl From<GenerateProposalError> for BatcherError {
     }
 }
 
-impl From<GetProposalResultError> for BatcherError {
-    fn from(err: GetProposalResultError) -> Self {
+impl From<ProposalError> for BatcherError {
+    fn from(err: ProposalError) -> Self {
         match err {
-            GetProposalResultError::BlockBuilderError(..) => BatcherError::InternalError,
-            GetProposalResultError::ProposalDoesNotExist { proposal_id } => {
-                BatcherError::ExecutedProposalNotFound { proposal_id }
-            }
-            GetProposalResultError::Aborted => BatcherError::ProposalAborted,
+            ProposalError::BlockBuilderError(..) => BatcherError::InternalError,
+            ProposalError::Aborted => BatcherError::ProposalAborted,
         }
     }
 }
diff --git a/crates/starknet_batcher/src/batcher_test.rs b/crates/starknet_batcher/src/batcher_test.rs
index 05ab9c25ae..c4134ea930 100644
--- a/crates/starknet_batcher/src/batcher_test.rs
+++ b/crates/starknet_batcher/src/batcher_test.rs
@@ -49,8 +49,8 @@ use crate::block_builder::{
 use crate::config::BatcherConfig;
 use crate::proposal_manager::{
     GenerateProposalError,
-    GetProposalResultError,
     InternalProposalStatus,
+    ProposalError,
     ProposalManagerTrait,
     ProposalOutput,
     ProposalResult,
@@ -156,7 +156,7 @@ fn mock_proposal_manager_common_expectations(
         .expect_wrap_await_proposal_commitment()
         .times(1)
         .with(eq(PROPOSAL_ID))
-        .return_once(move |_| { async move { Ok(proposal_commitment()) } }.boxed());
+        .return_once(move |_| { async move { Some(Ok(proposal_commitment())) } }.boxed());
 }
 
 fn mock_proposal_manager_validate_flow() -> MockProposalManagerTraitWrapper {
@@ -372,14 +372,14 @@ async fn send_finish_to_an_invalid_proposal() {
         .with(eq(PROPOSAL_ID), always(), always())
         .return_once(|_, _, _| { async move { Ok(()) } }.boxed());
 
-    let proposal_error = GetProposalResultError::BlockBuilderError(Arc::new(
+    let proposal_error = ProposalError::BlockBuilderError(Arc::new(
         BlockBuilderError::FailOnError(FailOnErrorCause::BlockFull),
     ));
     proposal_manager
         .expect_wrap_await_proposal_commitment()
         .times(1)
         .with(eq(PROPOSAL_ID))
-        .return_once(move |_| { async move { Err(proposal_error) } }.boxed());
+        .return_once(move |_| { async move { Some(Err(proposal_error)) } }.boxed());
 
     let mut batcher = create_batcher(MockDependencies {
         proposal_manager,
@@ -517,12 +517,12 @@ async fn decision_reached() {
         .with(eq(PROPOSAL_ID))
         .return_once(move |_| {
             async move {
-                Ok(ProposalOutput {
+                Some(Ok(ProposalOutput {
                     state_diff: ThinStateDiff::default(),
                     commitment: ProposalCommitment::default(),
                     tx_hashes: test_tx_hashes(),
                     nonces: test_contract_nonces(),
-                })
+                }))
             }
             .boxed()
         });
@@ -553,11 +553,11 @@ async fn decision_reached_no_executed_proposal() {
     let expected_error = BatcherError::ExecutedProposalNotFound { proposal_id: PROPOSAL_ID };
 
     let mut proposal_manager = MockProposalManagerTraitWrapper::new();
-    proposal_manager.expect_wrap_take_proposal_result().times(1).with(eq(PROPOSAL_ID)).return_once(
-        |proposal_id| {
-            async move { Err(GetProposalResultError::ProposalDoesNotExist { proposal_id }) }.boxed()
-        },
-    );
+    proposal_manager
+        .expect_wrap_take_proposal_result()
+        .times(1)
+        .with(eq(PROPOSAL_ID))
+        .return_once(|_| async move { None }.boxed());
 
     let mut batcher = create_batcher(MockDependencies { proposal_manager, ..Default::default() });
     let decision_reached_result =
@@ -578,7 +578,7 @@ trait ProposalManagerTraitWrapper: Send + Sync {
     fn wrap_take_proposal_result(
         &mut self,
         proposal_id: ProposalId,
-    ) -> BoxFuture<'_, ProposalResult<ProposalOutput>>;
+    ) -> BoxFuture<'_, Option<ProposalResult<ProposalOutput>>>;
 
     fn wrap_get_active_proposal(&self) -> BoxFuture<'_, Option<ProposalId>>;
 
@@ -596,7 +596,7 @@ trait ProposalManagerTraitWrapper: Send + Sync {
     fn wrap_await_proposal_commitment(
         &self,
         proposal_id: ProposalId,
-    ) -> BoxFuture<'_, ProposalResult<ProposalCommitment>>;
+    ) -> BoxFuture<'_, Option<ProposalResult<ProposalCommitment>>>;
 
     fn wrap_abort_proposal(&mut self, proposal_id: ProposalId) -> BoxFuture<'_, ()>;
 
@@ -617,7 +617,7 @@ impl<T: ProposalManagerTraitWrapper> ProposalManagerTrait for T {
     async fn take_proposal_result(
         &mut self,
         proposal_id: ProposalId,
-    ) -> ProposalResult<ProposalOutput> {
+    ) -> Option<ProposalResult<ProposalOutput>> {
         self.wrap_take_proposal_result(proposal_id).await
     }
 
@@ -642,7 +642,7 @@ impl<T: ProposalManagerTraitWrapper> ProposalManagerTrait for T {
     async fn await_proposal_commitment(
         &mut self,
         proposal_id: ProposalId,
-    ) -> ProposalResult<ProposalCommitment> {
+    ) -> Option<ProposalResult<ProposalCommitment>> {
         self.wrap_await_proposal_commitment(proposal_id).await
     }
 
diff --git a/crates/starknet_batcher/src/proposal_manager.rs b/crates/starknet_batcher/src/proposal_manager.rs
index f4dabdbbc2..7f27dffdc0 100644
--- a/crates/starknet_batcher/src/proposal_manager.rs
+++ b/crates/starknet_batcher/src/proposal_manager.rs
@@ -33,11 +33,9 @@ pub enum GenerateProposalError {
 }
 
 #[derive(Clone, Debug, Error)]
-pub enum GetProposalResultError {
+pub enum ProposalError {
     #[error(transparent)]
     BlockBuilderError(Arc<BlockBuilderError>),
-    #[error("Proposal with id {proposal_id} does not exist.")]
-    ProposalDoesNotExist { proposal_id: ProposalId },
     #[error("Proposal was aborted")]
     Aborted,
 }
@@ -61,7 +59,7 @@ pub trait ProposalManagerTrait: Send + Sync {
     async fn take_proposal_result(
         &mut self,
         proposal_id: ProposalId,
-    ) -> ProposalResult<ProposalOutput>;
+    ) -> Option<ProposalResult<ProposalOutput>>;
 
     #[allow(dead_code)]
     async fn get_active_proposal(&self) -> Option<ProposalId>;
@@ -78,7 +76,7 @@ pub trait ProposalManagerTrait: Send + Sync {
     async fn await_proposal_commitment(
         &mut self,
         proposal_id: ProposalId,
-    ) -> ProposalResult<ProposalCommitment>;
+    ) -> Option<ProposalResult<ProposalCommitment>>;
 
     async fn abort_proposal(&mut self, proposal_id: ProposalId);
 
@@ -109,7 +107,7 @@ pub(crate) struct ProposalManager {
     executed_proposals: Arc<Mutex<HashMap<ProposalId, ProposalResult<ProposalOutput>>>>,
 }
 
-pub type ProposalResult<T> = Result<T, GetProposalResultError>;
+pub type ProposalResult<T> = Result<T, ProposalError>;
 
 #[derive(Debug, PartialEq)]
 pub struct ProposalOutput {
@@ -143,7 +141,7 @@ impl ProposalManagerTrait for ProposalManager {
                     .build_block()
                     .await
                     .map(ProposalOutput::from)
-                    .map_err(|e| GetProposalResultError::BlockBuilderError(Arc::new(e)));
+                    .map_err(|e| ProposalError::BlockBuilderError(Arc::new(e)));
 
                 // The proposal is done, clear the active proposal.
                 // Keep the proposal result only if it is the same as the active proposal.
@@ -164,12 +162,8 @@ impl ProposalManagerTrait for ProposalManager {
     async fn take_proposal_result(
         &mut self,
         proposal_id: ProposalId,
-    ) -> ProposalResult<ProposalOutput> {
-        self.executed_proposals
-            .lock()
-            .await
-            .remove(&proposal_id)
-            .ok_or(GetProposalResultError::ProposalDoesNotExist { proposal_id })?
+    ) -> Option<ProposalResult<ProposalOutput>> {
+        self.executed_proposals.lock().await.remove(&proposal_id)
     }
 
     async fn get_active_proposal(&self) -> Option<ProposalId> {
@@ -210,17 +204,16 @@ impl ProposalManagerTrait for ProposalManager {
     async fn await_proposal_commitment(
         &mut self,
         proposal_id: ProposalId,
-    ) -> ProposalResult<ProposalCommitment> {
+    ) -> Option<ProposalResult<ProposalCommitment>> {
         if *self.active_proposal.lock().await == Some(proposal_id) {
             self.await_active_proposal().await;
         }
         let proposals = self.executed_proposals.lock().await;
-        let output = proposals
-            .get(&proposal_id)
-            .ok_or(GetProposalResultError::ProposalDoesNotExist { proposal_id })?;
+        let output = proposals.get(&proposal_id);
         match output {
-            Ok(output) => Ok(output.commitment),
-            Err(e) => Err(e.clone()),
+            Some(Ok(output)) => Some(Ok(output.commitment)),
+            Some(Err(e)) => Some(Err(e.clone())),
+            None => None,
         }
     }
 
@@ -229,10 +222,7 @@ impl ProposalManagerTrait for ProposalManager {
     async fn abort_proposal(&mut self, proposal_id: ProposalId) {
         if *self.active_proposal.lock().await == Some(proposal_id) {
             self.abort_active_proposal().await;
-            self.executed_proposals
-                .lock()
-                .await
-                .insert(proposal_id, Err(GetProposalResultError::Aborted));
+            self.executed_proposals.lock().await.insert(proposal_id, Err(ProposalError::Aborted));
         }
     }
 
diff --git a/crates/starknet_batcher/src/proposal_manager_test.rs b/crates/starknet_batcher/src/proposal_manager_test.rs
index 318ddb619e..2f92a8492b 100644
--- a/crates/starknet_batcher/src/proposal_manager_test.rs
+++ b/crates/starknet_batcher/src/proposal_manager_test.rs
@@ -6,7 +6,7 @@ use starknet_batcher_types::batcher_types::ProposalId;
 use crate::block_builder::{BlockBuilderTrait, BlockExecutionArtifacts, MockBlockBuilderTrait};
 use crate::proposal_manager::{
     GenerateProposalError,
-    GetProposalResultError,
+    ProposalError,
     ProposalManager,
     ProposalManagerTrait,
     ProposalOutput,
@@ -70,7 +70,7 @@ async fn spawn_proposal(
 async fn spawn_proposal_success(mut proposal_manager: ProposalManager) {
     spawn_proposal(&mut proposal_manager, ProposalId(0), mock_build_block()).await;
 
-    proposal_manager.take_proposal_result(ProposalId(0)).await.unwrap();
+    proposal_manager.take_proposal_result(ProposalId(0)).await.unwrap().unwrap();
 }
 
 #[rstest]
@@ -117,13 +117,10 @@ async fn take_proposal_result_no_active_proposal(mut proposal_manager: ProposalM
     let expected_proposal_output =
         ProposalOutput::from(BlockExecutionArtifacts::create_for_testing());
     assert_eq!(
-        proposal_manager.take_proposal_result(ProposalId(0)).await.unwrap(),
+        proposal_manager.take_proposal_result(ProposalId(0)).await.unwrap().unwrap(),
         expected_proposal_output
     );
-    assert_matches!(
-        proposal_manager.take_proposal_result(ProposalId(0)).await,
-        Err(GetProposalResultError::ProposalDoesNotExist { .. })
-    );
+    assert_matches!(proposal_manager.take_proposal_result(ProposalId(0)).await, None);
 }
 
 #[rstest]
@@ -137,7 +134,7 @@ async fn abort_active_proposal(mut proposal_manager: ProposalManager) {
 
     assert_matches!(
         proposal_manager.take_proposal_result(ProposalId(0)).await,
-        Err(GetProposalResultError::Aborted)
+        Some(Err(ProposalError::Aborted))
     );
 
     // Make sure there is no active proposal.
@@ -156,10 +153,7 @@ async fn reset(mut proposal_manager: ProposalManager) {
     proposal_manager.reset().await;
 
     // Make sure executed proposals are deleted.
-    assert_matches!(
-        proposal_manager.take_proposal_result(ProposalId(0)).await,
-        Err(GetProposalResultError::ProposalDoesNotExist { .. })
-    );
+    assert_matches!(proposal_manager.take_proposal_result(ProposalId(0)).await, None);
 
     // Make sure there is no active proposal.
     assert!(!proposal_manager.await_active_proposal().await);