[#130] sdk: Define object identifier type

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
This commit is contained in:
Leonard Lyubich 2020-09-01 16:11:38 +03:00 committed by Stanislav Bogatyrev
parent edd0004b93
commit a65db08608
2 changed files with 81 additions and 0 deletions

54
pkg/object/id.go Normal file
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@ -0,0 +1,54 @@
package object
import (
"crypto/sha256"
"github.com/nspcc-dev/neofs-api-go/v2/refs"
"github.com/pkg/errors"
)
// ID represents object identifier that
// supports different type of values.
type ID struct {
val []byte
}
// SetSHA256 sets object identifier value to SHA256 checksum.
func (id *ID) SetSHA256(v [sha256.Size]byte) {
if id != nil {
id.val = v[:]
}
}
// ToV2 converts ID to v2 ObjectID message.
func (id *ID) ToV2() *refs.ObjectID {
if id != nil {
idV2 := new(refs.ObjectID)
idV2.SetValue(id.val)
return idV2
}
return nil
}
// IDFromV2 converts v2 ObjectID message to ID.
//
// Returns an error if the format of the identifier
// in the message is broken.
func IDFromV2(idV2 *refs.ObjectID) (*ID, error) {
if idV2 == nil {
return nil, nil
}
val := idV2.GetValue()
if ln := len(val); ln != sha256.Size {
return nil, errors.Errorf("could not convert %T to %T: invalid length %d",
idV2, (*ID)(nil), ln,
)
}
return &ID{
val: val,
}, nil
}

27
pkg/object/id_test.go Normal file
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package object
import (
"crypto/rand"
"crypto/sha256"
"testing"
"github.com/stretchr/testify/require"
)
func TestIDV2(t *testing.T) {
id := new(ID)
checksum := [sha256.Size]byte{}
_, err := rand.Read(checksum[:])
require.NoError(t, err)
id.SetSHA256(checksum)
idV2 := id.ToV2()
id2, err := IDFromV2(idV2)
require.NoError(t, err)
require.Equal(t, id, id2)
}