bug fixes in both backends. add ledger_range rpc. improve test scripts

handlers/AccountTx.cpp

@@ -169,7 +169,10 @@ doAccountTx(boost::json::object const& request, BackendInterface const& backend)
         cursor = {*ledgerSequence, *transactionIndex};
     }
 
-    constexpr uint32_t limit = 500;
+    uint32_t limit = 200;
+    if (request.contains("limit") and
+        request.at("limit").kind() == boost::json::kind::int64)
+        limit = request.at("limit").as_int64();
     boost::json::array txns;
     auto [blobs, retCursor] =
         backend.fetchAccountTransactions(*account, limit, cursor);

handlers/BookOffers.cpp

@@ -293,7 +293,7 @@ doBookOffers(
         return response;
     }
 
-    std::uint32_t limit = 500;
+    std::uint32_t limit = 200;
     if (request.contains("limit") and
         request.at("limit").kind() == boost::json::kind::int64)
         limit = request.at("limit").as_int64();

handlers/LedgerData.cpp

@@ -70,7 +70,7 @@ doLedgerData(
     std::vector<Backend::LedgerObject>& results = page.objects;
     std::optional<ripple::uint256> const& returnedCursor = page.cursor;
     BOOST_LOG_TRIVIAL(debug)
-        << "doUpperBound returned " << results.size() << " results";
+        << __func__ << " number of results = " << results.size();
     for (auto const& [key, object] : results)
     {
         ripple::STLedgerEntry sle{

handlers/LedgerRange.cpp

@@ -0,0 +1,22 @@
+#include <handlers/RPCHelpers.h>
+#include <reporting/BackendInterface.h>
+
+boost::json::object
+doLedgerRange(
+    boost::json::object const& request,
+    BackendInterface const& backend)
+{
+    boost::json::object response;
+
+    auto range = backend.fetchLedgerRange();
+    if (!range)
+    {
+        response["error"] = "No data";
+    }
+    else
+    {
+        response["ledger_index_min"] = range->minSequence;
+        response["ledger_index_max"] = range->maxSequence;
+    }
+    return response;
+}