We are upgrading our Hedera Mainnet and Testnet Mirror Node infrastructure to v0.162.0. This release focuses on security fixes, bug corrections, and performance improvements. Notable enhancements include optimized contract storage lookups in web3 that eliminate an unbounded per-contract cache, support for HIP-1261 simple fees in gas price calculations for contract REST APIs, and improved block node streaming.
During the maintenance window, brief interruptions to RPC availability may occur.
RPC Changes: - contract storage lookups (web3) — Performance optimized by removing an unbounded per-contract cache that could cause quadratic query growth under load. - gas price calculation (contract REST APIs) — Now supports HIP-1261 simple fee schedules when calculating gas prices. - HCS transaction alias resolution — Aliases on HCS transactions are now properly resolved in the importer. - contract results endpoints — Responses no longer include transaction_index=null entries. - block root hashing — Refactored to use a fixed 16-slot sub Merkle tree for improved consistency.