Merge pull request onflow#6567 from AndriiDiachuk/improve-bounds-chec…

…king-in-converter

[Access] Improve bounds checking in rest converters

engine/access/rest/routes/transactions_test.go

@@ -403,6 +403,7 @@ func TestCreateTransaction(t *testing.T) {
 			{"reference_block_id", "-1", `{"code":400, "message":"invalid reference block ID: invalid ID format"}`},
 			{"reference_block_id", "", `{"code":400, "message":"reference block not provided"}`},
 			{"gas_limit", "-1", `{"code":400, "message":"invalid gas limit: value must be an unsigned 64 bit integer"}`},
+			{"gas_limit", "18446744073709551616", `{"code":400, "message":"invalid gas limit: value overflows uint64 range"}`},
 			{"payer", "yo", `{"code":400, "message":"invalid payer: invalid address"}`},
 			{"proposal_key", "yo", `{"code":400, "message":"request body contains an invalid value for the \"proposal_key\" field (at position 461)"}`},
 			{"authorizers", "", `{"code":400, "message":"request body contains an invalid value for the \"authorizers\" field (at position 32)"}`},

engine/access/rest/util/converter.go

@@ -2,6 +2,7 @@ package util
 
 import (
 	"encoding/base64"
+	"errors"
 	"fmt"
 	"strconv"
 )
@@ -15,6 +16,9 @@ func FromUint[U uint | uint64 | uint32](number U) string {
 func ToUint64(uint64Str string) (uint64, error) {
 	val, err := strconv.ParseUint(uint64Str, 10, 64)
 	if err != nil {
+		if errors.Is(err, strconv.ErrRange) {
+			return 0, fmt.Errorf("value overflows uint64 range")
+		}
 		return 0, fmt.Errorf("value must be an unsigned 64 bit integer") // hide error from user
 	}
 	return val, nil
@@ -24,6 +28,9 @@ func ToUint64(uint64Str string) (uint64, error) {
 func ToUint32(uint32Str string) (uint32, error) {
 	val, err := strconv.ParseUint(uint32Str, 10, 32)
 	if err != nil {
+		if errors.Is(err, strconv.ErrRange) {
+			return 0, fmt.Errorf("value overflows uint32 range")
+		}
 		return 0, fmt.Errorf("value must be an unsigned 32 bit integer") // hide error from user
 	}
 	return uint32(val), nil