Function SplitKey

x/keys.go:512–526

SplitKey takes a key baseKey and generates the key of the list split that starts at startUid.

(baseKey []byte, startUid uint64)

// SplitKey takes a key baseKey and generates the key of the list split that starts at startUid.
func SplitKey(baseKey []byte, startUid uint64) ([]byte, error) {
	keyCopy := make([]byte, len(baseKey)+8)
	copy(keyCopy, baseKey)

	if keyCopy[0] != DefaultPrefix {
		return nil, errors.Errorf("only keys with default prefix can have a split key")
	}
	// Change the first byte (i.e the key prefix) to ByteSplit to signal this is an
	// individual part of a single list key.
	keyCopy[0] = ByteSplit

	// Append the start uid at the end of the key.
	binary.BigEndian.PutUint64(keyCopy[len(baseKey):], startUid)
	return keyCopy, nil
}

// Parse would parse the key. ParsedKey does not reuse the key slice, so the key slice can change
// without affecting the contents of ParsedKey.