constellation/internal/nodestate/nodestate.go
2022-09-22 09:10:19 +02:00

38 lines
991 B
Go

/*
Copyright (c) Edgeless Systems GmbH
SPDX-License-Identifier: AGPL-3.0-only
*/
package nodestate
import (
"fmt"
"github.com/edgelesssys/constellation/v2/internal/file"
"github.com/edgelesssys/constellation/v2/internal/role"
)
const nodeStatePath = "/run/state/constellation/node_state.json"
// NodeState is the state of a constellation node that is required to recover from a reboot.
// Can be persisted to disk and reloaded later.
type NodeState struct {
Role role.Role
MeasurementSalt []byte
}
// FromFile reads a NodeState from disk.
func FromFile(fileHandler file.Handler) (*NodeState, error) {
nodeState := &NodeState{}
if err := fileHandler.ReadJSON(nodeStatePath, nodeState); err != nil {
return nil, fmt.Errorf("loading node state: %w", err)
}
return nodeState, nil
}
// ToFile writes a NodeState to disk.
func (nodeState *NodeState) ToFile(fileHandler file.Handler) error {
return fileHandler.WriteJSON(nodeStatePath, nodeState, file.OptMkdirAll)
}