Add support for XLS-81 Permissioned DEX (#5404)

Modified transactions:
- OfferCreate
- Payment

Modified RPCs:
- book_changes
- subscribe
- book_offers
- ripple_path_find
- path_find

Spec: https://github.com/XRPLF/XRPL-Standards/pull/281

src/test/jtx/impl/domain.cpp

@@ -0,0 +1,36 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2025 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <test/jtx/domain.h>
+
+#include <xrpl/protocol/jss.h>
+
+namespace ripple {
+namespace test {
+namespace jtx {
+
+void
+domain::operator()(Env&, JTx& jt) const
+{
+    jt[sfDomainID.jsonName] = to_string(v_);
+}
+
+}  // namespace jtx
+}  // namespace test
+}  // namespace ripple