Move transform_response to reduce cast main.rs (#3532)

<!-- Reference any GitHub issues resolved by this PR -->

Closes #

## Introduced changes

<!-- A brief description of the changes -->

-

## Checklist

<!-- Make sure all of these are complete -->

- [x] Linked relevant issue
- [x] Updated relevant documentation
- [x] Added relevant tests
- [x] Performed self-review of the code
- [x] Added changes to `CHANGELOG.md`

Author: franciszekjob

crates/sncast/src/main.rs

@@ -10,7 +10,7 @@ use anyhow::{Context, Result, bail};
 use camino::Utf8PathBuf;
 use clap::{CommandFactory, Parser, Subcommand};
 use configuration::load_config;
-use data_transformer::{reverse_transform_output, transform};
+use data_transformer::transform;
 use foundry_ui::{Message, UI};
 use shared::auto_completions::{Completion, generate_completions};
 use sncast::helpers::config::{combine_cast_configs, get_global_config_path};
@@ -20,14 +20,13 @@ use sncast::helpers::output_format::output_format_from_json_flag;
 use sncast::helpers::scarb_utils::{
     BuildConfig, assert_manifest_path_exists, build_and_load_artifacts, get_package_metadata,
 };
-use sncast::response::call::CallResponse;
 use sncast::response::cast_message::SncastMessage;
 use sncast::response::command::CommandResponse;
 use sncast::response::declare::DeclareResponse;
 use sncast::response::errors::ResponseError;
 use sncast::response::errors::handle_starknet_command_error;
 use sncast::response::explorer_link::{ExplorerLinksMessage, block_explorer_link_if_allowed};
-use sncast::response::transformed_call::TransformedCallResponse;
+use sncast::response::transformed_call::transform_response;
 use sncast::{
     ValidatedWaitParams, WaitForTx, get_account, get_block_id, get_class_hash_by_address,
     get_contract_class,
@@ -546,33 +545,6 @@ fn get_cast_config(cli: &Cli, ui: &UI) -> Result<CastConfig> {
     Ok(combined_config)
 }
 
-fn transform_response(
-    result: &Result<CallResponse>,
-    contract_class: &ContractClass,
-    selector: &Felt,
-) -> Option<TransformedCallResponse> {
-    let Ok(CallResponse { response, .. }) = result else {
-        return None;
-    };
-
-    if response.is_empty() {
-        return None;
-    }
-
-    let ContractClass::Sierra(sierra_class) = contract_class else {
-        return None;
-    };
-
-    let abi: Vec<AbiEntry> = serde_json::from_str(sierra_class.abi.as_str()).ok()?;
-
-    let transformed_response = reverse_transform_output(response, &abi, selector).ok()?;
-
-    Some(TransformedCallResponse {
-        response_raw: response.clone(),
-        response: transformed_response,
-    })
-}
-
 fn process_command_result<T>(
     command: &str,
     result: Result<T>,

crates/sncast/src/response/transformed_call.rs

@@ -1,11 +1,15 @@
 use super::command::CommandResponse;
+use crate::response::call::CallResponse;
 use crate::response::cast_message::SncastMessage;
+use anyhow::Result;
 use conversions::string::IntoHexStr;
+use data_transformer::reverse_transform_output;
 use foundry_ui::Message;
 use foundry_ui::styling;
 use serde::Serialize;
 use serde_json::Value;
 use serde_json::json;
+use starknet::core::types::{ContractClass, contract::AbiEntry};
 use starknet_types_core::felt::Felt;
 
 #[derive(Serialize, Clone)]
@@ -44,3 +48,31 @@ impl Message for SncastMessage<TransformedCallResponse> {
         })
     }
 }
+
+#[must_use]
+pub fn transform_response(
+    result: &Result<CallResponse>,
+    contract_class: &ContractClass,
+    selector: &Felt,
+) -> Option<TransformedCallResponse> {
+    let Ok(CallResponse { response, .. }) = result else {
+        return None;
+    };
+
+    if response.is_empty() {
+        return None;
+    }
+
+    let ContractClass::Sierra(sierra_class) = contract_class else {
+        return None;
+    };
+
+    let abi: Vec<AbiEntry> = serde_json::from_str(sierra_class.abi.as_str()).ok()?;
+
+    let transformed_response = reverse_transform_output(response, &abi, selector).ok()?;
+
+    Some(TransformedCallResponse {
+        response_raw: response.clone(),
+        response: transformed_response,
+    })
+}