added throttler and crypto quantity

package-lock.json

@@ -17,7 +17,7 @@
         "@nestjs/passport": "^10.0.3",
         "@nestjs/platform-express": "^10.0.0",
         "@nestjs/swagger": "^7.1.17",
-        "@nestjs/throttler": "^5.1.1",
+        "@nestjs/throttler": "^5.1.2",
         "@prisma/client": "^5.8.1",
         "@prisma/studio": "^0.497.0",
         "@types/nodemailer": "^6.4.14",

package.json

@@ -28,7 +28,7 @@
     "@nestjs/passport": "^10.0.3",
     "@nestjs/platform-express": "^10.0.0",
     "@nestjs/swagger": "^7.1.17",
-    "@nestjs/throttler": "^5.1.1",
+    "@nestjs/throttler": "^5.1.2",
     "@prisma/client": "^5.8.1",
     "@prisma/studio": "^0.497.0",
     "@types/nodemailer": "^6.4.14",

prisma/migrations/20240607141740_/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "Crypto" ADD COLUMN     "quantity" DOUBLE PRECISION NOT NULL DEFAULT 1000;

prisma/schema.prisma

@@ -14,6 +14,7 @@ model Crypto {
   name       String @unique
   value      Float
   image      String
+  quantity   Float            @default(1000)
   created_at DateTime        @default(now())
   updated_at DateTime        @updatedAt @default(now())
   UserHasCrypto UserHasCrypto[]

src/app.module.ts

@@ -10,6 +10,7 @@ import { CryptoModule } from './crypto/crypto.module';
 import { TradeModule } from './trade/trade.module';
 import { OfferModule } from './offer/offer.module';
 import { UserModule } from './user/user.module';
+import { ThrottlerModule } from '@nestjs/throttler';
 
 @Module({
   imports: [
@@ -24,6 +25,12 @@ import { UserModule } from './user/user.module';
     TradeModule,
     OfferModule,
     UserModule,
+    ThrottlerModule.forRoot([
+      {
+        ttl: 60000,
+        limit: 40,
+      },
+    ]),
   ],
   controllers: [AppController],
   providers: [AppService],

src/crypto/crypto.service.ts

@@ -57,6 +57,7 @@ export class CryptoService {
         name: dto.name,
         image: dto.image,
         value: dto.value,
+        quantity: dto.quantity,
       },
     });
 
@@ -75,7 +76,9 @@ export class CryptoService {
         id: userId,
       },
     });
-
+    if (crypto.quantity < dto.amount) {
+      throw new ForbiddenException('No more tokens available');
+    }
     const necessaryAmount = crypto.value * dto.amount;
     console.log(necessaryAmount, user.dollarAvailables);
 

src/crypto/dto/crypto.dto.ts

@@ -17,6 +17,14 @@ export class CryptoDto {
   @IsNumber()
   value: number;
 
+  @ApiProperty({
+    type: Number,
+    description: 'Quantity of tokens available on the platform',
+    example: 100,
+  })
+  @IsNumber()
+  quantity: number;
+
   @ApiProperty({
     type: String,
     description: 'Image for the cryptocurrency in ',