Method prepare_checkpoint

atomic-cli/src/commands/agent/owner.rs:329–356

(
        &self,
        reservation: JournalTurnReservation,
        source: JournalCheckpointSource,
        now: i64,
    )

    }

    fn prepare_checkpoint(
        &self,
        reservation: JournalTurnReservation,
        source: JournalCheckpointSource,
        now: i64,
    ) -> Result<JournalCheckpointAttempt, String> {
        let repository = self.repository.clone();
        run_outside_async_runtime(move || {
            let response = request_with_reconnect(
                &repository,
                OwnerRequest::PrepareCheckpoint {
                    provenance_id: reservation.provenance_id,
                    expected_generation: reservation.generation,
                    reuse_frozen_changes: source.change_hashes.is_empty(),
                    source: to_store_checkpoint_source(source),
                    now,
                },
            )?;
            match response {
                OwnerResponse::CheckpointPrepared { attempt } => Ok(to_journal_checkpoint_attempt(
                    reservation.provenance_id,
                    attempt,
                )),
                other => Err(unexpected_response("prepare checkpoint", other)),
            }
        })
        .map_err(|error| error.to_string())
    }

    fn load_frozen_envelopes(
        &self,