diff --git a/Cargo.lock b/Cargo.lock
index 89d1c6bb2a..081a9edd8b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3879,6 +3879,7 @@ dependencies = [
  "eyre",
  "owo-colors 4.1.0",
  "path-absolutize",
+ "serde",
  "serde_json",
  "sha256",
  "spinoff",
diff --git a/crates/iroha_core/src/sumeragi/main_loop.rs b/crates/iroha_core/src/sumeragi/main_loop.rs
index 4ec1ceb020..a0f51104cf 100644
--- a/crates/iroha_core/src/sumeragi/main_loop.rs
+++ b/crates/iroha_core/src/sumeragi/main_loop.rs
@@ -263,13 +263,12 @@ impl Sumeragi {
                     };
 
                     if block.as_ref().errors().next().is_some() {
-                        error!("Genesis contains invalid transactions");
-
                         for error in block.as_ref().errors() {
                             error!(
                                 peer_id=%self.peer,
                                 role=%self.role(),
-                                ?error
+                                ?error,
+                                "Invalid transaction in genesis"
                             );
                         }
                         continue;
diff --git a/crates/iroha_test_network/src/lib.rs b/crates/iroha_test_network/src/lib.rs
index 107920ca55..7d76bbab85 100644
--- a/crates/iroha_test_network/src/lib.rs
+++ b/crates/iroha_test_network/src/lib.rs
@@ -339,15 +339,6 @@ impl NetworkBuilder {
             commit_time = SumeragiParameters::default().commit_time();
         }
 
-        // Unoptimized profile requires additional resources.
-        // if cfg!(debug_assertions) {
-        //     extra_isi.push(InstructionBox::SetParameter(SetParameter::new(
-        //         Parameter::Executor(SmartContractParameter::Fuel(
-        //             std::num::NonZeroU64::new(80000000).expect("Fuel must be positive."),
-        //         )),
-        //     )));
-        // }
-
         let genesis = config::genesis(
             [
                 InstructionBox::SetParameter(SetParameter::new(Parameter::Sumeragi(
diff --git a/crates/iroha_test_samples/src/lib.rs b/crates/iroha_test_samples/src/lib.rs
index 9884762c53..8513db7f4d 100644
--- a/crates/iroha_test_samples/src/lib.rs
+++ b/crates/iroha_test_samples/src/lib.rs
@@ -10,6 +10,7 @@ use std::{
 use iroha_crypto::KeyPair;
 use iroha_data_model::prelude::{AccountId, WasmSmartContract};
 use iroha_wasm_builder::Profile;
+use serde::Deserialize;
 
 /// Generate [`AccountId`](iroha_data_model::account::AccountId) in the given `domain`.
 ///
@@ -130,6 +131,11 @@ pub fn load_sample_wasm(name: impl AsRef<str>) -> WasmSmartContract {
     }
 }
 
+#[derive(Deserialize)]
+struct WasmBuildConfiguration {
+    profile: Profile,
+}
+
 /// Load WASM smart contract build profile
 ///
 /// WASMs must be pre-built with the `build_wasm.sh` script
@@ -150,15 +156,9 @@ pub fn load_wasm_build_profile() -> Profile {
             panic!("could not read WASM build profile");
         }
         Ok(content) => {
-            let parsed: toml::Value =
-                toml::from_str(content.as_str()).expect("must parse config file");
-            let profile_str = parsed
-                .get("profile")
-                .and_then(toml::Value::as_str)
-                .expect("profile must be present in config");
-            profile_str
-                .parse()
-                .unwrap_or_else(|_| panic!("unrecognized profile {profile_str}"))
+            let WasmBuildConfiguration { profile } = toml::from_str(content.as_str())
+                .expect("a valid config must be written by `build_wasm.sh`");
+            profile
         }
     }
 }
diff --git a/crates/iroha_wasm_builder/Cargo.toml b/crates/iroha_wasm_builder/Cargo.toml
index d8864507d5..9f0b14af89 100644
--- a/crates/iroha_wasm_builder/Cargo.toml
+++ b/crates/iroha_wasm_builder/Cargo.toml
@@ -14,6 +14,7 @@ workspace = true
 [dependencies]
 eyre = { workspace = true }
 serde_json = { workspace = true, features = ["std"] }
+serde = { workspace = true, features = ["std"] }
 sha256 = "1.5.0"
 path-absolutize = { workspace = true }
 strum = { workspace = true, features = ["derive", "std"] }
diff --git a/crates/iroha_wasm_builder/src/lib.rs b/crates/iroha_wasm_builder/src/lib.rs
index f72b31756e..d21d8cbd47 100644
--- a/crates/iroha_wasm_builder/src/lib.rs
+++ b/crates/iroha_wasm_builder/src/lib.rs
@@ -12,12 +12,24 @@ use std::{
 
 use eyre::{bail, eyre, Context as _, Result};
 use path_absolutize::Absolutize;
+use serde::{Deserialize, Serialize};
 
 /// Current toolchain used to build smartcontracts
 const TOOLCHAIN: &str = "+nightly-2024-09-09";
 
 /// Build profile for smartcontracts
-#[derive(Debug, Copy, Clone, Eq, PartialEq, strum::Display, strum::EnumString, Default)]
+#[derive(
+    Debug,
+    Copy,
+    Clone,
+    Eq,
+    PartialEq,
+    strum::Display,
+    strum::EnumString,
+    Default,
+    Serialize,
+    Deserialize,
+)]
 #[strum(serialize_all = "snake_case")]
 pub enum Profile {
     /// Applies release optimization