Try the Compact Block Filters in nostr:nprofile1qqsyz7tjgwuarktk88qvlnkzue3ja52c3e64s7pcdwj52egphdfll0cpzdmhxue69uhhwmm59e6hg7r09ehkuef0qyt8wumn8ghj7am0wsh8xmmkvf5hgtngdaehgtcpz4mhxue69uhhyetvv9ujuerpd46hxtnfduhsxlc7jt https://bitcoin-safe.org/en/knowledge/compact-block-filters/

A great workshop on this tonight thanks nostr:npub1hvqhft3p5m9vrg9fez62cm4lmftvu5tqtsc4kxpyju9uya0hywdq3ny4jq and thanks nostr:npub1q67f4d7qdja237us384ryeekxsz88lz5kaawrcynwe4hqsnufr6s27up0e for building such clever project