fixed db operations

api/gateway/tron/shared/hex.go

@@ -0,0 +1,50 @@
+package shared
+
+import (
+	"math/big"
+	"strings"
+
+	"github.com/tech/sendico/pkg/merrors"
+)
+
+var (
+	errHexEmpty      = merrors.InvalidArgument("hex value is empty")
+	errHexInvalid    = merrors.InvalidArgument("invalid hex number")
+	errHexOutOfRange = merrors.InvalidArgument("hex number out of range")
+)
+
+// DecodeHexBig parses a hex string that may include leading zero digits.
+func DecodeHexBig(input string) (*big.Int, error) {
+	trimmed := strings.TrimSpace(input)
+	if trimmed == "" {
+		return nil, errHexEmpty
+	}
+	noPrefix := strings.TrimPrefix(trimmed, "0x")
+	if noPrefix == "" {
+		return nil, errHexEmpty
+	}
+	value := strings.TrimLeft(noPrefix, "0")
+	if value == "" {
+		return big.NewInt(0), nil
+	}
+	val := new(big.Int)
+	if _, ok := val.SetString(value, 16); !ok {
+		return nil, errHexInvalid
+	}
+	return val, nil
+}
+
+// DecodeHexUint8 parses a hex string into uint8, allowing leading zeros.
+func DecodeHexUint8(input string) (uint8, error) {
+	val, err := DecodeHexBig(input)
+	if err != nil {
+		return 0, err
+	}
+	if val == nil {
+		return 0, errHexInvalid
+	}
+	if val.BitLen() > 8 {
+		return 0, errHexOutOfRange
+	}
+	return uint8(val.Uint64()), nil
+}