Polling Avalanche Wallet Balances at Scale: A Guide for Custodians (opens in new tab)

A custodial Avalanche product, a treasury management tool, or a multi-wallet portfolio service all have the same data problem. The product needs the AVAX balance and ERC-20 token holdings for every customer address it tracks, anchored to a specific block height for deterministic reporting, refreshed on a clock so the UI is never stale, across thousands of addresses without operating an Avalanche archive node and without paying per call for repeated polls. This article walks through the Avalan...