An NFT staking product kept its ownership cache fresh by polling a DAS provider: the poll consumed a monthly quota and the cache still lagged the chain.
One server-filtered Yellowstone gRPC owner-watcher stream, collection memcmp filter, no subscription cap, no sharding.
Owner state patches into the cache as transfers land, with automatic primary to secondary failover. Stake and lock state is classified from chain, not a lagging indexer, behind three-tier RPC routing and a circuit breaker that pauses cranks the instant an endpoint degrades.
Live at weavers.carbium.io against program ww3st35u7nDFdAypP8nXjyCQy9cUMp9i1cuAJq2JKgL, reward mint SPDR.