Solana has improved its historical data retrieval process by developing a faster and more efficient archival storage system. The new API method, getTransactionsForAddress, significantly reduces the number of RPC calls needed and enhances query flexibility. This overhaul aims to streamline access to transaction data for developers and users alike.

This article discusses a proposed protocol for API metering that ensures user privacy while allowing for efficient and secure transactions. It introduces Rate-Limit Nullifiers (RLN) to enable anonymous API usage, where users can make multiple requests after a single deposit without linking their identity to their queries. The protocol aims to protect both users and providers against spam and abuse.