Fix Bundle data deserialisation (#256)

## 📝 Summary

<!--- A general summary of your changes -->

## 💡 Motivation and Context

<!--- (Optional) Why is this change required? What problem does it
solve? Remove this section if not applicable. -->

---

## ✅ I have completed the following steps:

* [x] Run `make lint`
* [x] Run `make test`
* [x] Added tests (if applicable)

---------

Co-authored-by: Daniel Xifra <[email protected]>
Co-authored-by: Ferran Borreguero <[email protected]>

crates/rbuilder/src/primitives/serialize.rs

@@ -5,8 +5,8 @@ use super::{
     TransactionSignedEcRecoveredWithBlobs, TxRevertBehavior,
 };
 use alloy_primitives::{Address, Bytes, B256, U64};
-use serde::{Deserialize, Serialize};
-use serde_with::{serde_as, DefaultOnNull};
+use serde::{Deserialize, Deserializer, Serialize};
+use serde_with::serde_as;
 use thiserror::Error;
 use tracing::error;
 use uuid::Uuid;
@@ -36,6 +36,15 @@ impl TxEncoding {
     }
 }
 
+fn deserialize_vec_b256_from_null_or_string<'de, D>(deserializer: D) -> Result<Vec<B256>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    // Option::deserialize handles null.S
+    let opt = Option::deserialize(deserializer)?;
+    Ok(opt.unwrap_or_default())
+}
+
 /// Struct to de/serialize json Bundles from bundles APIs and from/db.
 /// Does not assume a particular format on txs.
 #[serde_as]
@@ -44,7 +53,7 @@ impl TxEncoding {
 pub struct RawBundle {
     pub block_number: U64,
     pub txs: Vec<Bytes>,
-    #[serde_as(deserialize_as = "DefaultOnNull")]
+    #[serde(default, deserialize_with = "deserialize_vec_b256_from_null_or_string")]
     pub reverting_tx_hashes: Vec<B256>,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub replacement_uuid: Option<Uuid>,
@@ -665,6 +674,59 @@ mod tests {
         assert_eq!(bundle.uuid, uuid!("5d5bf52c-ac3f-57eb-a3e9-fc01b18ca516"));
     }
 
+    #[test]
+    fn test_correct_bundle_uuid_missing_reverting_hashes() {
+        // raw json string
+        let bundle_json = r#"
+        {
+            "blockNumber": "0xA136F1F",
+            "txs": ["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"]
+        }"#;
+
+        let bundle_request: RawBundle =
+            serde_json::from_str(bundle_json).expect("failed to decode bundle");
+
+        let bundle = bundle_request
+            .try_into(TxEncoding::WithBlobData)
+            .expect("failed to convert bundle request to bundle");
+
+        assert_eq!(
+            bundle.hash,
+            fixed_bytes!("cf3c567aede099e5455207ed81c4884f72a4c0c24ddca331163a335525cd22cc")
+        );
+        assert_eq!(bundle.uuid, uuid!("5d5bf52c-ac3f-57eb-a3e9-fc01b18ca516"));
+    }
+
+    ///Real life case
+    #[test]
+    fn test_correct_bundle_uuid_null_reverting_hashes() {
+        // raw json string
+        let bundle_json ="{\"txs\":[\"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\"],\"replacementUuid\":null,\"signingAddress\":\"0x564d55a3a73f6efb907afe92b1706602b2d54018\",\"blockNumber\":\"0x142dd19\",\"minTimestamp\":null,\"maxTimestamp\":null,\"revertingTxHashes\":null}";
+
+        let bundle_request: RawBundle =
+            serde_json::from_str(bundle_json).expect("failed to decode bundle");
+
+        let bundle = bundle_request
+            .clone()
+            .try_into(TxEncoding::WithBlobData)
+            .expect("failed to convert bundle request to bundle");
+
+        let bundle_roundtrip = RawBundle::encode_no_blobs(bundle.clone());
+        assert_eq!(bundle_request, bundle_roundtrip);
+
+        assert_eq!(
+            bundle.hash,
+            fixed_bytes!("08b57aa2df6e4729c55b809d1110f16aba30956cfc17f7ad771441d6d418f991")
+        );
+        assert_eq!(bundle.uuid, uuid!("0cc09d2b-6538-5d0e-a627-22c400845783"));
+
+        assert!(bundle.reverting_tx_hashes.is_empty());
+        assert_eq!(bundle.txs.len(), 1);
+
+        assert_eq!(bundle.min_timestamp, None);
+        assert_eq!(bundle.max_timestamp, None);
+    }
+
     #[test]
     fn test_correct_raw_tx_decoding() {
         // raw json string