ringdb: use the genesis block as a db name

This will avoid careless forkers polluting the shared database
even if they make their own chain. They'll then automatically
start using another subdb, and any key-reusing fork of those
forks will reuse their subdbs.

src/blockchain_utilities/blockchain_blackball.cpp

@@ -310,7 +310,9 @@ int main(int argc, char* argv[])
   std::unordered_map<crypto::key_image, std::vector<uint64_t>> relative_rings;
   std::unordered_map<output_data, std::unordered_set<crypto::key_image>> outputs;
   std::unordered_set<output_data> spent, newly_spent;
-  tools::ringdb ringdb(output_file_path.string());
+
+  cryptonote::block b = core_storage[0]->get_db().get_block_from_height(0);
+  tools::ringdb ringdb(output_file_path.string(), epee::string_tools::pod_to_hex(get_block_hash(b)));
 
   for (size_t n = 0; n < inputs.size(); ++n)
   {

src/wallet/ringdb.cpp

@@ -175,7 +175,7 @@ enum { BLACKBALL_BLACKBALL, BLACKBALL_UNBLACKBALL, BLACKBALL_QUERY, BLACKBALL_CL
 namespace tools
 {
 
-ringdb::ringdb(std::string filename):
+ringdb::ringdb(std::string filename, const std::string &genesis):
   filename(filename)
 {
   MDB_txn *txn;
@@ -198,11 +198,11 @@ ringdb::ringdb(std::string filename):
   epee::misc_utils::auto_scope_leave_caller txn_dtor = epee::misc_utils::create_scope_leave_handler([&](){if (tx_active) mdb_txn_abort(txn);});
   tx_active = true;
 
-  dbr = mdb_dbi_open(txn, "rings", MDB_CREATE, &dbi_rings);
+  dbr = mdb_dbi_open(txn, ("rings-" + genesis).c_str(), MDB_CREATE, &dbi_rings);
   THROW_WALLET_EXCEPTION_IF(dbr, tools::error::wallet_internal_error, "Failed to open LMDB dbi: " + std::string(mdb_strerror(dbr)));
   mdb_set_compare(txn, dbi_rings, compare_hash32);
 
-  dbr = mdb_dbi_open(txn, "blackballs", MDB_CREATE | MDB_INTEGERKEY | MDB_DUPSORT | MDB_DUPFIXED, &dbi_blackballs);
+  dbr = mdb_dbi_open(txn, ("blackballs-" + genesis).c_str(), MDB_CREATE | MDB_INTEGERKEY | MDB_DUPSORT | MDB_DUPFIXED, &dbi_blackballs);
   THROW_WALLET_EXCEPTION_IF(dbr, tools::error::wallet_internal_error, "Failed to open LMDB dbi: " + std::string(mdb_strerror(dbr)));
   mdb_set_dupsort(txn, dbi_blackballs, compare_hash32);
 

src/wallet/ringdb.h

@@ -40,7 +40,7 @@ namespace tools
   class ringdb
   {
   public:
-    ringdb(std::string filename);
+    ringdb(std::string filename, const std::string &genesis);
     ~ringdb();
 
     bool add_rings(const crypto::chacha_key &chacha_key, const cryptonote::transaction_prefix &tx);

src/wallet/wallet2.cpp

@@ -5454,8 +5454,10 @@ void wallet2::set_ring_database(const std::string &filename)
   m_ring_database = filename;
   MINFO("ringdb path set to " << filename);
   m_ringdb.reset();
+  cryptonote::block b;
+  generate_genesis(b);
   if (!m_ring_database.empty())
-    m_ringdb.reset(new tools::ringdb(m_ring_database));
+    m_ringdb.reset(new tools::ringdb(m_ring_database, epee::string_tools::pod_to_hex(get_block_hash(b))));
 }
 
 bool wallet2::add_rings(const crypto::chacha_key &key, const cryptonote::transaction_prefix &tx)