We are upgrading our Aleo Testnet infrastructure to snarkOS testnet-v4.13.0 on 2026-11-17. This is a non-consensus-breaking release built against snarkVM v4.13.0-rc.1, introducing validator upgrade safety checks, improved block sync efficiency, REST API v2 migration, and enhanced metrics granularity. There is no activation height; validators and nodes on v4.12.x and v4.13.0 remain interoperable and may upgrade at their convenience. Brief interruptions to RPC availability may occur on that date.
RPC Changes: - REST API v1 — The v1 REST API and unversioned routes are now deprecated. They continue to work but responses carry Deprecation and Link headers directing users to /v2. See node/rest/MIGRATING_TO_V2.md for migration guidance. - REST API responses — Responses are now compact JSON (not pretty-printed) and are gzip-compressed when the client sends Accept-Encoding: gzip. - Endpoint versioning (snarkos developer) — The snarkos developer CLI commands now use /v2. An --endpoint without a version gets /v2/ appended automatically; endpoints with query strings are rejected.