Handle redeclaration in estimate fee, closes #3253

crates/sncast/src/starknet_commands/declare.rs

@@ -9,11 +9,13 @@ use sncast::helpers::rpc::RpcArgs;
 use sncast::response::declare::{
     AlreadyDeclaredResponse, DeclareResponse, DeclareTransactionResponse,
 };
-use sncast::response::errors::StarknetCommandError;
+use sncast::response::errors::{SNCastProviderError, SNCastStarknetError, StarknetCommandError};
 use sncast::{ErrorData, WaitForTx, apply_optional_fields, handle_wait_for_tx};
 use starknet::accounts::AccountError::Provider;
 use starknet::accounts::{ConnectedAccount, DeclarationV3};
-use starknet::core::types::{DeclareTransactionResult, StarknetError};
+use starknet::core::types::{
+    ContractExecutionError, DeclareTransactionResult, StarknetError, TransactionExecutionErrorData,
+};
 use starknet::providers::ProviderError;
 use starknet::{
     accounts::{Account, SingleOwnerAccount},
@@ -157,6 +159,22 @@ pub async fn declare_with_artifacts(
                 class_hash: class_hash.into_(),
             }))
         }
+        Err(Provider(ProviderError::StarknetError(StarknetError::TransactionExecutionError(
+            TransactionExecutionErrorData {
+                execution_error: ContractExecutionError::Message(message),
+                ..
+            },
+        )))) if message.contains("is already declared") => {
+            if skip_on_already_declared {
+                Ok(DeclareResponse::AlreadyDeclared(AlreadyDeclaredResponse {
+                    class_hash: class_hash.into_(),
+                }))
+            } else {
+                Err(StarknetCommandError::ProviderError(
+                    SNCastProviderError::StarknetError(SNCastStarknetError::ClassAlreadyDeclared),
+                ))
+            }
+        }
         Err(Provider(error)) => Err(StarknetCommandError::ProviderError(error.into())),
         Err(error) => Err(anyhow!(format!("Unexpected error occurred: {error}")).into()),
     }

crates/sncast/tests/e2e/declare.rs

@@ -315,6 +315,45 @@ async fn test_contract_already_declared() {
     );
 }
 
+#[tokio::test]
+async fn test_contract_already_declared_estimate_fee() {
+    let contract_path = duplicate_contract_directory_with_salt(
+        CONTRACTS_DIR.to_string() + "/map",
+        "put",
+        "74362345",
+    );
+    let tempdir = create_and_deploy_oz_account().await;
+    join_tempdirs(&contract_path, &tempdir);
+
+    let args = vec![
+        "--accounts-file",
+        "accounts.json",
+        "--account",
+        "my_account",
+        "declare",
+        "--url",
+        URL,
+        "--contract-name",
+        "Map",
+    ];
+    // Commented out because we explicitly do not want to set any resource bounds.
+    // Transaction has to go through estimate fee endpoint first because it throws different errors
+    // than the normal declare endpoint and we want to test them.
+
+    runner(&args).current_dir(tempdir.path()).assert().success();
+
+    let snapbox = runner(&args).current_dir(tempdir.path());
+    let output = snapbox.assert().success();
+
+    assert_stderr_contains(
+        output,
+        indoc! {r"
+        Command: declare
+        Error: Contract with the same class hash is already declared
+        "},
+    );
+}
+
 #[tokio::test]
 async fn test_invalid_nonce() {
     let contract_path =