Polling Avalanche Wallet Balances at Scale: A Guide for Custodians

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 [Avalanche a