feat: Add delegate filter param for account_tx RPC

API-CHANGELOG.md

@@ -28,6 +28,9 @@ This section contains changes targeting a future version.
 
 ### Additions
 
+- `account_tx`: Added an optional `delegate` request object to filter delegated transactions. The object requires `delegate_filter`, which must be either `actor` for transactions owned by the requested account but signed by another account, or `authorizer` for transactions signed by the requested account on behalf of another account. The optional `counter_party` account narrows the results to a specific signer/delegate for `actor` or a specific owner/delegator for `authorizer`. Malformed `delegate`, `delegate_filter`, and `counter_party` values return standard invalid field errors, and invalid account IDs return `actMalformed`.
+  When paginating delegate-filtered queries, a marker from a delegate-filtered query includes a `delegate` flag and is only valid for follow-up requests that also supply `delegate` (mixing marker conventions returns `invalidParams`). Because filtering is applied after the ledger scan, a page may contain fewer results than `limit` (possibly zero) while still returning a marker, so callers must continue until no marker is present.
+
 - `ledger_entry`, `account_objects`: The `Delegate` ledger entry now includes an optional `DestinationNode` field, which stores the index into the authorized account's owner directory. This field is present on entries created after bidirectional directory tracking was introduced and may appear in RPC responses for those entries. ([#6681](https://github.com/XRPLF/rippled/pull/6681))
 
 - `server_definitions`: Added the following new sections to the response ([#6321](https://github.com/XRPLF/rippled/pull/6321)):

include/xrpl/protocol/jss.h

@@ -110,6 +110,7 @@ JSS(accounts);                    // in: LedgerEntry, Subscribe, handlers/Ledger
 JSS(accounts_proposed);           // in: Subscribe, Unsubscribe
 JSS(action);                      //
 JSS(active);                      // out: OverlayImpl
+JSS(actor);                       // in/out: AccountTx
 JSS(acquiring);                   // out: LedgerRequest
 JSS(address);                     // out: PeerImp
 JSS(affected);                    // out: AcceptedLedgerTx
@@ -133,6 +134,7 @@ JSS(attestation_reward_account);  //
 JSS(auction_slot);                // out: amm_info
 JSS(authorized);                  // out: AccountLines
 JSS(authorize);                   // out: delegate
+JSS(authorizer);                  // in/out: AccountTx
 JSS(authorized_credentials);      // in: ledger_entry DepositPreauth
 JSS(auth_accounts);               // out: amm_info
 JSS(auth_change);                 // out: AccountInfo
@@ -191,6 +193,7 @@ JSS(converge_time);                  // out: NetworkOPs
 JSS(converge_time_s);                // out: NetworkOPs
 JSS(cookie);                         // out: NetworkOPs
 JSS(count);                          // in: AccountTx*, ValidatorList
+JSS(counter_party);                  // in/out: AccountTx
 JSS(counters);                       // in/out: retrieve counters
 JSS(credentials);                    // in: deposit_authorized
 JSS(credential_type);                // in: LedgerEntry DepositPreauth
@@ -270,6 +273,7 @@ JSS(freeze);                         // out: AccountLines
 JSS(freeze_peer);                    // out: AccountLines
 JSS(deep_freeze);                    // out: AccountLines
 JSS(deep_freeze_peer);               // out: AccountLines
+JSS(delegate_filter);                // in/out: AccountTx
 JSS(frozen_balances);                // out: GatewayBalances
 JSS(full);                           // in: LedgerClearer, handlers/Ledger
 JSS(full_reply);                     // out: PathFind

include/xrpl/rdb/RelationalDatabase.h

@@ -46,6 +46,22 @@ struct LedgerRange
     uint32_t max;
 };
 
+/**
+ * @brief Enumeration of possible delegate types that can occur during filtering in account_tx
+ */
+enum class DelegateType {
+    Actor,  ///< Another account signed and submitted transactions on behalf of this account (this
+            ///< account is the owner/delegator).
+    Authorizer  ///< This account signed and submitted transactions on behalf of another account
+                ///< (this account is the signer/delegatee).
+};
+
+struct DelegateFilter
+{
+    DelegateType type = DelegateType::Actor;
+    std::optional<AccountID> counterparty;
+};
+
 class RelationalDatabase
 {
 public:
@@ -82,6 +98,7 @@ class RelationalDatabase
         std::optional<AccountTxMarker> marker;
         std::uint32_t limit = 0;
         bool bAdmin = false;
+        std::optional<DelegateFilter> delegate;
     };
 
     using AccountTx = std::pair<std::shared_ptr<Transaction>, std::shared_ptr<TxMeta>>;
@@ -101,6 +118,7 @@ class RelationalDatabase
         bool forward = false;
         uint32_t limit = 0;
         std::optional<AccountTxMarker> marker;
+        std::optional<DelegateFilter> delegate;
     };
 
     struct AccountTxResult
@@ -109,6 +127,7 @@ class RelationalDatabase
         LedgerRange ledgerRange{};
         uint32_t limit = 0;
         std::optional<AccountTxMarker> marker;
+        std::optional<DelegateFilter> delegate;
     };
 
     virtual ~RelationalDatabase() = default;

sanitizers/suppressions/sanitizer-ignorelist.txt

@@ -29,7 +29,7 @@ src:test/beast/beast_PropertyStream_test.cpp
 src:src/test/app/Invariants_test.cpp
 
 # ASan false positive: stack-use-after-scope in ErrorCodes.h inline functions.
-# When Clang inlines the StaticString overloads (e.g. invalid_field_error(StaticString)),
+# When Clang inlines the StaticString overloads (e.g. invalidFieldError(StaticString)),
 # ASan scope-poisons the temporary std::string before the inlined callee finishes reading
 # through the const ref. This corrupts the coroutine stack and crashes the Simulate test.
 # See asan.supp comments for full explanation and planned fix.