Implement RecursiveTypeDecoder for nested data

crates/core/src/decode/json_to_scval.rs

@@ -270,7 +270,7 @@ mod tests {
         ];
 
         for case in cases {
-            let json = scval_to_json(&case);
+            let json = scval_to_json(&case, None);
             let parsed = json_to_scval(&json).expect("should parse");
 
             // For strings, scval_to_json might have been passed a Symbol, but json_to_scval will parse it back as String.
@@ -301,7 +301,7 @@ mod tests {
             .unwrap(),
         )));
 
-        let json = scval_to_json(&map);
+        let json = scval_to_json(&map, None);
         // This should be the fallback array mode
         assert!(json.is_array());
 

crates/core/src/decode/mod.rs

@@ -18,6 +18,7 @@ pub mod json_to_scval;
 pub mod mappings;
 /// Envelope-level decoding that emits one diagnostic report per operation.
 pub mod multi_op_decoder;
+pub mod recursive_decoder;
 pub mod report;
 pub mod resource_analyzer;
 pub mod return_decoder;
@@ -37,6 +38,7 @@ pub use enum_decoder::EnumDecoder;
 pub use function_call_decoder::{DecodedArgument, DecodedFunctionCall, FunctionCallDecoder};
 pub use json_to_scval::json_to_scval;
 pub use multi_op_decoder::{decode_transaction_with_op_filter, MultiOpDecoder};
+pub use recursive_decoder::{RecursiveTypeDecoder, TypeRef};
 pub use resource_analyzer::{
     MetricDiagnostic, MetricKind, ResourceDiagnostics, ResourceUsageAnalyzer, TransactionResultMeta,
 };

crates/core/src/decode/multi_op_decoder.rs

@@ -401,7 +401,7 @@ fn compact_json(value: &Value) -> String {
 }
 
 fn format_scval(value: &ScVal) -> String {
-    compact_json(&crate::decode::scval_to_json(value))
+    compact_json(&crate::decode::scval_to_json(value, None))
 }
 
 fn is_soroban_operation(operation: &Operation) -> bool {