decrypt_master_key.py: prints the existing master xprv after an explicit
confirmation prompt, for disaster-recovery backups. Falls back to
./data/keys/master.xprv.enc (the docker-compose.yml bind-mount path) when
.env's configured MASTER_KEY_PATH doesn't exist locally.
encrypt_master_key.py: the reverse direction — takes an externally-generated
xprv (e.g. created offline/air-gapped) via a hidden getpass prompt, validates
it parses as a private extended key, and encrypts it with the same Fernet
scheme generate_master_key.py uses. Refuses to overwrite an existing key file
unless --overwrite is passed.
Neither script is reachable via any API endpoint or the admin panel, by
design — this is the one secret the entire custodial wallet derives from.
Documented in docs/setup.md (new "Recuperare o portare una xprv esistente"
section) and CLAUDE.md's Commands block.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
davideandClaude Sonnet 5
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