use internal error constants

internal/errors/migrated_errors.go

@@ -20,6 +20,7 @@ var (
 	ErrOverflow                   = errors.New("ERR increment or decrement would overflow")                              // Signifies that an increment or decrement operation would exceed the limits.
 	ErrSyntax                     = errors.New("ERR syntax error")                                                       // Represents a syntax error in a DiceDB command.
 	ErrKeyNotFound                = errors.New("ERR no such key")                                                        // Indicates that the specified key does not exist.
+	ErrUnableToFetchKeys          = errors.New("ERR unable to fetch keys from store")                                    // Indicates that the specified key does not exist.
 	ErrWrongTypeOperation         = errors.New("WRONGTYPE Operation against a key holding the wrong kind of value")      // Signals an operation attempted on a key with an incompatible type.
 	ErrInvalidHyperLogLogKey      = errors.New("WRONGTYPE Key is not a valid HyperLogLog string value")                  // Indicates that a key is not a valid HyperLogLog value.
 	ErrCorruptedHyperLogLogObject = errors.New("INVALIDOBJ Corrupted HLL object detected")                               // Signals detection of a corrupted HyperLogLog object.

internal/eval/eval.go

@@ -3921,7 +3921,6 @@ func evalSINTER(args []string, store *dstore.Store) []byte {
 	return clientio.Encode(members, false)
 }
 
-
 func evalHLEN(args []string, store *dstore.Store) []byte {
 	if len(args) != 1 {
 		return diceerrors.NewErrArity("HLEN")
@@ -4818,8 +4817,7 @@ func evalRANDOMKEY(args []string, store *dstore.Store) *EvalResponse {
 
 	availKeys, err := store.Keys("*")
 	if err != nil {
-		return &EvalResponse{Result: nil,
-			Error: errors.New(string(diceerrors.NewErrWithMessage("could not fetch keys to extract a random key")))}
+		return &EvalResponse{Result: nil, Error: diceerrors.ErrUnableToFetchKeys}
 	}
 
 	if len(availKeys) > 0 {