Function resolve_verifier

atomic-cli/src/commands/memory/list.rs:137–155

Resolve the verifying identity exactly as `memory verify` does, but SOFT: a missing default (or no store) yields `Ok(None)` (all verifies `–`); a `--identity ` that does not exist IS a hard error.

(name: &Option<String>)

/// missing default (or no store) yields `Ok(None)` (all verifies `–`); a
/// `--identity <name>` that does not exist IS a hard error.
fn resolve_verifier(name: &Option<String>) -> CliResult<Option<Verifier>> {
    let store = match IdentityStore::open_default() {
        Ok(s) => s,
        Err(_) => return Ok(None),
    };
    let identity = if let Some(name) = name {
        Some(
            store
                .load_by_name(name)
                .map_err(|_| CliError::IdentityNotFound(name.clone()))?,
        )
    } else {
        store.get_default().ok().flatten()
    };
    Ok(identity.map(|id| Verifier {
        did: did_for_public_key(&id.public_key),
        public_key: id.public_key,
    }))
}

/// The DID-match-then-verify rule for a memory. Pure over its inputs so it can be
/// unit-tested without a global `IdentityStore`. See the intent list's