Polling Cardano Stake and Reward Balances at Scale: A Guide for Custodians (opens in new tab)

A custodial Cardano product has the same data problem every day. It needs to display the current ADA balance, native asset holdings, staked amount, and claimable rewards for every customer address it manages. It needs to refresh that data on a clock so the UI is never stale. It needs to do this for thousands of addresses without operating a node fleet and without paying per call for repeated polls. This article walks through the Cardano staking query pattern, the caching behaviour that makes ...