added more security check rules in dtos

src/offer/dto/offer.dto.ts

@@ -1,12 +1,22 @@
 import { ApiProperty } from '@nestjs/swagger';
-import { IsNumber, IsPositive, IsString } from 'class-validator';
+import {
+  IsNumber,
+  IsPositive,
+  IsString,
+  IsUUID,
+  Max,
+  MaxLength,
+  Min,
+} from 'class-validator';
 export class OfferDto {
   @ApiProperty({
     type: String,
     description: 'Cryptocurrency UUID',
     example: '12121-DSZD-E221212-2121221',
   })
+  @MaxLength(50)
   @IsString()
+  @IsUUID()
   id_crypto: string;
 
   @ApiProperty({
@@ -15,6 +25,8 @@ export class OfferDto {
     description: 'Amount traded ',
     example: 21,
   })
+  @Min(1)
+  @Max(1000)
   @IsNumber()
   @IsPositive()
   amount: number;