Upgrades

Every release is published on its network's channel with a signed index (releases.json) and signed checksums. Each release names the one it can roll back to.

• Testnet: the visor checks each new release against the pinned key and applies it by itself.
• Mainnet: download the release, verify it exactly as in Run a node, point the node at it and restart through the visor.

A release that changes the chain's rules names the height from which they apply, so every validator switches at the same height. The rules in force are published in GET /truth/v1 (rules).