package container import ( "bytes" "crypto/sha256" "github.com/mr-tron/base58" "github.com/nspcc-dev/neofs-api-go/internal" "github.com/nspcc-dev/neofs-api-go/v2/refs" "github.com/pkg/errors" ) // ID represents v2-compatible container identifier. type ID refs.ContainerID // ErrBadID should be returned when bytes slice isn't Container.ID size (sha256.Size). // Notice: if byte slice changed, please, replace error message. const ErrBadID = internal.Error("object.ID should be 32 bytes length") // NewIDFromV2 wraps v2 ContainerID message to ID. func NewIDFromV2(idV2 *refs.ContainerID) *ID { return (*ID)(idV2) } // NewID creates and initializes blank ID. // // Works similar to NewIDFromV2(new(ContainerID)). func NewID() *ID { return NewIDFromV2(new(refs.ContainerID)) } // SetSHA256 sets container identifier value to SHA256 checksum. func (id *ID) SetSHA256(v [sha256.Size]byte) { (*refs.ContainerID)(id).SetValue(v[:]) } // ToV2 returns the v2 container ID message. func (id *ID) ToV2() *refs.ContainerID { return (*refs.ContainerID)(id) } // Equal returns true if identifiers are identical. func (id *ID) Equal(id2 *ID) bool { return bytes.Equal( (*refs.ContainerID)(id).GetValue(), (*refs.ContainerID)(id2).GetValue(), ) } // Parse converts base58 string representation into ID. func (id *ID) Parse(s string) error { data, err := base58.Decode(s) if err != nil { return errors.Wrap(err, "could not parse container.ID from string") } else if len(data) != sha256.Size { return ErrBadID } (*refs.ContainerID)(id).SetValue(data) return nil } // String returns base58 string representation of ID. func (id *ID) String() string { return base58.Encode((*refs.ContainerID)(id).GetValue()) } // Marshal marshals ID into a protobuf binary form. // // Buffer is allocated when the argument is empty. // Otherwise, the first buffer is used. func (id *ID) Marshal(b ...[]byte) ([]byte, error) { var buf []byte if len(b) > 0 { buf = b[0] } return (*refs.ContainerID)(id). StableMarshal(buf) } // Unmarshal unmarshals protobuf binary representation of ID. func (id *ID) Unmarshal(data []byte) error { return (*refs.ContainerID)(id). Unmarshal(data) } // MarshalJSON encodes ID to protobuf JSON format. func (id *ID) MarshalJSON() ([]byte, error) { return (*refs.ContainerID)(id). MarshalJSON() } // UnmarshalJSON decodes ID from protobuf JSON format. func (id *ID) UnmarshalJSON(data []byte) error { return (*refs.ContainerID)(id). UnmarshalJSON(data) }