Report error if state is not found in getPersistentStateSize query

This will allow us to omit preparePersistentState query in the future.

Author: DanShaders

tl/generate/scheme/ton_api.tl

@@ -410,6 +410,7 @@ tonNode.preparedProofLink = tonNode.PreparedProof;
 tonNode.preparedState = tonNode.PreparedState;
 tonNode.notFoundState = tonNode.PreparedState;
 tonNode.persistentStateSize size:long = tonNode.PersistentStateSize;
+tonNode.persistentStateSizeNotFound = tonNode.PersistentStateSize;
 tonNode.prepared = tonNode.Prepared;
 tonNode.notFound = tonNode.Prepared;
 tonNode.data data:bytes = tonNode.Data;

tl/generate/scheme/ton_api.tlo

@@ -423,8 +423,11 @@ void FullNodeMasterImpl::process_query(adnl::AdnlNodeIdShort src, ton_api::tonNo
                                        td::Promise<td::BufferSlice> promise) {
   auto P = td::PromiseCreator::lambda(
       [SelfId = actor_id(this), promise = std::move(promise)](td::Result<td::uint64> R) mutable {
-        TRY_RESULT_PROMISE(promise, size, std::move(R));
-        promise.set_value(create_serialize_tl_object<ton_api::tonNode_persistentStateSize>(size));
+        if (R.is_error()) {
+          promise.set_value(create_serialize_tl_object<ton_api::tonNode_persistentStateSizeNotFound>());
+        } else {
+          promise.set_value(create_serialize_tl_object<ton_api::tonNode_persistentStateSize>(R.move_as_ok()));
+        }
       });
   auto block_id = create_block_id(query.block_);
   auto masterchain_block_id = create_block_id(query.masterchain_block_);

validator/full-node-master.cpp

@@ -730,8 +730,11 @@ void FullNodeShardImpl::process_query(adnl::AdnlNodeIdShort src, ton_api::tonNod
                                       td::Promise<td::BufferSlice> promise) {
   auto P = td::PromiseCreator::lambda(
       [SelfId = actor_id(this), promise = std::move(promise)](td::Result<td::uint64> R) mutable {
-        TRY_RESULT_PROMISE(promise, size, std::move(R));
-        promise.set_value(create_serialize_tl_object<ton_api::tonNode_persistentStateSize>(size));
+        if (R.is_error()) {
+          promise.set_value(create_serialize_tl_object<ton_api::tonNode_persistentStateSizeNotFound>());
+        } else {
+          promise.set_value(create_serialize_tl_object<ton_api::tonNode_persistentStateSize>(R.move_as_ok()));
+        }
       });
   auto block_id = create_block_id(query.block_);
   auto masterchain_block_id = create_block_id(query.masterchain_block_);