pub fn project_chain_key(
path: &Path,
seed: Option<[u8; 32]>,
) -> Result<SigningKey, IdentityError>Expand description
The chain signing key of a project kernel: the project key pre_boot
already loaded and certified (seed, the node key seed), confirmed
against the 0600 project.key at path with the strict reader (no
symlink, no creation, no chmod). A missing seed, a missing file or a file
that no longer holds that key refuses the boot (ADR-103 A7, one key).