fix(rust/catalyst-types): add conversion error in problem report (#143)

* fix(catalyst-types): add conversion error in problem report

Signed-off-by: bkioshn <[email protected]>

* fix(catalyst-types): linter and format

Signed-off-by: bkioshn <[email protected]>

---------

Signed-off-by: bkioshn <[email protected]>

Author: bkioshn

rust/catalyst-types/src/problem_report.rs

@@ -55,6 +55,15 @@ enum Kind {
         /// Additional information about the duplicate field.
         description: String,
     },
+    /// Conversion error.
+    ConversionError {
+        /// The field that failed to convert
+        field: String,
+        /// The value that failed to convert
+        value: String,
+        /// The type that the value was expected to convert to
+        expected_type: String,
+    },
     /// An uncategorized problem was encountered. Use only for rare problems, otherwise
     /// make a new problem kind.
     Other {
@@ -378,6 +387,42 @@ impl ProblemReport {
         );
     }
 
+    /// Reports a conversion error.
+    ///
+    /// This method adds an entry to the problem report indicating that a field failed to
+    /// convert to the expected type, along with the value that failed to convert and
+    /// the expected type.
+    ///
+    /// # Arguments
+    ///
+    /// * `field`: A string slice representing the field that failed to convert.
+    /// * `value`: A string slice representing the value that failed to convert.
+    /// * `expected_type`: A string slice representing the type that the value was
+    ///   expected to convert to.
+    ///
+    /// # Example
+    ///
+    /// ```rust
+    /// use catalyst_types::problem_report::ProblemReport;
+    /// let report = ProblemReport::new("RBAC Registration Decoding");
+    /// report.conversion_error(
+    ///     "address bytes",
+    ///     "[1, 2, 3, 4]",
+    ///     "Address",
+    ///     "RBAC stake address",
+    /// );
+    /// ```
+    pub fn conversion_error(&self, field: &str, value: &str, expected_type: &str, context: &str) {
+        self.add_entry(
+            Kind::ConversionError {
+                field: field.to_owned(),
+                value: value.to_owned(),
+                expected_type: expected_type.to_owned(),
+            },
+            context,
+        );
+    }
+
     /// Reports an uncategorized problem with the given description and context.
     ///
     /// This method is intended for use in rare situations where a specific type of