fix problems with empty transaction list

Author: einhornimmond

dependencies/gradido_blockchain

@@ -369,7 +369,10 @@ namespace cache {
 		}
 		uint32_t publicKeyIndex = 0;
 		if (filter.involvedPublicKey && !filter.involvedPublicKey->isEmpty()) {
-			publicKeyIndex = publicKeysDictionary.getIndexForString(filter.involvedPublicKey->copyAsString());
+			auto involvedPublicKeyCopy = filter.involvedPublicKey->copyAsString();
+			if (publicKeysDictionary.hasString(involvedPublicKeyCopy)) {
+				publicKeyIndex = publicKeysDictionary.getIndexForString(involvedPublicKeyCopy);
+			}
 		}
 		uint32_t coinCommunityKeyIndex = 0;
 		if (!filter.coinCommunityId.empty()) {

src/cache/BlockIndex.cpp

@@ -44,7 +44,6 @@ namespace cache {
 		std::string getFullString() const;
 
 	protected:
-		std::string mDictionaryName;
 		std::string mKey;
 	};
 

src/cache/Exceptions.h

@@ -80,6 +80,7 @@ namespace model {
 			}
 			allTransactionsVector.clear();
 			if (transactionsVector.empty()) {
+				transactionList.AddMember("transactions", Value(kArrayType), alloc);
 				return std::move(transactionList);
 			}