better cache for blocks
{"e":"TypeError(\"'>' not supported between instances of 'NoneType' and 'int'\",)","lirb":81172157,"request_string":"{\"id\":1,\"jsonrpc\":\"2.0\",\"method\":\"block_api.get_block\",\"params\":{\"block_num\":81172159}}","jsonrpc_response":{"jsonrpc":"2.0","result":{},"id":1},"event":"Unable to cache using last irreversible block","logger":"jussi.cache.utils","level":"warning"}
Jussi might not know what the actual irreversible block is.