Fix: add validate:"dive" tag for the rpccore.LimitSlice type (#3419)

* Update limit_slice.go

Signed-off-by: Thiago Ribeiro <62709592+thiagodeev@users.noreply.github.com>

* test: Add validation test for LimitSlice type

* test: Update validation test to use a new random type in LimitSlice

---------

Signed-off-by: Thiago Ribeiro <62709592+thiagodeev@users.noreply.github.com>

Author: thiagodeev

rpc/rpccore/limit_slice.go

@@ -27,7 +27,7 @@ func (l FunctionCalldataLimit) Limit() int { return functionCalldataLimit }
 func (l SenderAddressLimit) Limit() int    { return senderAddressLimit }
 
 type LimitSlice[T any, L Limit] struct {
-	Data []T
+	Data []T `validate:"dive"`
 }
 
 func (l LimitSlice[T, L]) MarshalJSON() ([]byte, error) {

rpc/rpccore/limit_slice_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/NethermindEth/juno/core/felt"
 	"github.com/NethermindEth/juno/rpc/rpccore"
 	rpcv9 "github.com/NethermindEth/juno/rpc/v9"
+	"github.com/NethermindEth/juno/validator"
 	"github.com/stretchr/testify/require"
 )
 
@@ -56,6 +57,28 @@ func TestLazySlice(t *testing.T) {
 			nil,
 		)
 	})
+
+	// This test ensures that the validation logic works for the values inside the Data slice.
+	t.Run("ValidateRequiredFields", func(t *testing.T) {
+		// Random type with validation tags
+		type RandType struct {
+			A int `validate:"required"`
+			B int `validate:"gt=5"`
+		}
+
+		type RandLimitSlice = rpccore.LimitSlice[
+			RandType,
+			rpccore.SimulationLimit,
+		]
+
+		withEmptyValues := RandLimitSlice{
+			Data: make([]RandType, 10),
+		}
+
+		validate := validator.Validator()
+		err := validate.Struct(withEmptyValues)
+		require.Error(t, err, "Validation is not working for the values inside the Data slice")
+	})
 }
 
 func runTest[T any, L rpccore.Limit](