From 32c4400f94aebd40e87ede986017604dff81d308 Mon Sep 17 00:00:00 2001
From: Bohdan Ohorodnii <limposfeed@gmail.com>
Date: Mon, 12 Aug 2024 12:56:21 +0300
Subject: [PATCH] feat: add syscall failure format

---
 .../syscalls/syscall_tests/failure_format.rs  | 23 +++++++++++++++++++
 .../execution/syscalls/syscall_tests/mod.rs   |  1 +
 2 files changed, 24 insertions(+)
 create mode 100644 crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs

diff --git a/crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs b/crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs
new file mode 100644
index 0000000000..27891c2f2d
--- /dev/null
+++ b/crates/blockifier/src/execution/syscalls/syscall_tests/failure_format.rs
@@ -0,0 +1,23 @@
+use cairo_lang_utils::byte_array::BYTE_ARRAY_MAGIC;
+use starknet_types_core::felt::Felt;
+
+use crate::execution::errors::EntryPointExecutionError;
+
+#[test]
+fn test_syscall_failure_format() {
+    let error_data = vec![
+        // Magic to indicate that this is a byte array.
+        BYTE_ARRAY_MAGIC,
+        // The number of full words in the byte array.
+        "0x00",
+        // The pending word of the byte array: "Execution failure"
+        "0x457865637574696f6e206661696c757265",
+        // The length of the pending word.
+        "0x11",
+    ]
+    .into_iter()
+    .map(|x| Felt::from_hex(x).unwrap())
+    .collect();
+    let error = EntryPointExecutionError::ExecutionFailed { error_data };
+    assert_eq!(error.to_string(), "Execution failed. Failure reason: \"Execution failure\".");
+}
diff --git a/crates/blockifier/src/execution/syscalls/syscall_tests/mod.rs b/crates/blockifier/src/execution/syscalls/syscall_tests/mod.rs
index 3f048e319a..fbebf14ba8 100644
--- a/crates/blockifier/src/execution/syscalls/syscall_tests/mod.rs
+++ b/crates/blockifier/src/execution/syscalls/syscall_tests/mod.rs
@@ -2,6 +2,7 @@ mod call_contract;
 mod constants;
 mod deploy;
 mod emit_event;
+mod failure_format;
 mod get_block_hash;
 mod get_execution_info;
 mod keccak;