package object 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 object identifier. type ID refs.ObjectID // ErrBadID should be returned when bytes slice hasn't 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 ObjectID message to ID. func NewIDFromV2(idV2 *refs.ObjectID) *ID { return (*ID)(idV2) } // NewID creates and initializes blank ID. // // Works similar as NewIDFromV2(new(ObjectID)). func NewID() *ID { return NewIDFromV2(new(refs.ObjectID)) } // SetSHA256 sets object identifier value to SHA256 checksum. func (id *ID) SetSHA256(v [sha256.Size]byte) { (*refs.ObjectID)(id).SetValue(v[:]) } // Equal returns true if identifiers are identical. func (id *ID) Equal(id2 *ID) bool { return bytes.Equal( (*refs.ObjectID)(id).GetValue(), (*refs.ObjectID)(id2).GetValue(), ) } // ToV2 converts ID to v2 ObjectID message. func (id *ID) ToV2() *refs.ObjectID { return (*refs.ObjectID)(id) } // 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 object.ID from string") } else if len(data) != sha256.Size { return ErrBadID } (*refs.ObjectID)(id).SetValue(data) return nil } // String returns base58 string representation of ID. func (id *ID) String() string { return base58.Encode((*refs.ObjectID)(id).GetValue()) }