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Jeroen UbbinkandClaude Opus 4.8
7106dfe330
A node with a legacy plaintext nsec but no ROUTSTR_SECRET_KEY refused to boot: bootstrap_secrets raised and vault.encrypt required the env key. That turned encryption at rest into a hard breaking change on auto-upgrade. Encryption stays mandatory — the nsec is never persisted in plaintext — but key custody becomes flexible. When no ROUTSTR_SECRET_KEY is set, encrypt() generates a Fernet key, writes it owner-only (0600) to a key file, and prints a one-time back-it-up notice, so an upgrading node keeps running. The read path stays strict: decrypt()/get_fernet() never mint a key (a fresh key could not match existing ciphertext) and fail fast with the generation command when none is configured. A malformed env key still fails fast rather than silently self-provisioning a different key. The key file defaults beside the SQLite database (ROUTSTR_SECRET_KEY_FILE overrides), so it rides whatever volume already persists the data instead of a working-directory path a container recreate would drop. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>