feat: se agrego ms-transaccion y ms-antifraud-rules

docker-compose.yml

@@ -7,6 +7,7 @@ services:
     environment:
       - POSTGRES_USER=postgres
       - POSTGRES_PASSWORD=postgres
+      - POSTGRES_DB=transaction_db
   zookeeper:
     image: confluentinc/cp-zookeeper:5.5.3
     environment:

.gitignore → ms-antifraud-rules/.gitignore

@@ -39,6 +39,8 @@ build/Release
 
 # Dependency directories
 node_modules/
+ms-antifraud-rules/node_modules/
+ms-transacciones/node_modules/
 jspm_packages/
 
 # TypeScript v1 declaration files
@@ -81,6 +83,8 @@ typings/
 # Nuxt.js build / generate output
 .nuxt
 dist
+ms-transacciones/dist
+ms-antifraud-rules/dist
 
 # Gatsby files
 .cache/

ms-antifraud-rules/.prettierrc

@@ -0,0 +1,4 @@
+{
+  "singleQuote": true,
+  "trailingComma": "all"
+}

ms-antifraud-rules/README.md

@@ -0,0 +1,72 @@
+# ms-antifraud-rules
+
+The `ms-antifraud-rules` microservice is responsible for validating financial transactions and determining their status (approved or rejected) based on predefined rules.
+
+## Features
+
+- Listens to `transaction-created` events from Kafka.
+- Validates transactions based on their value:
+  - Transactions with a value greater than 1000 are rejected.
+  - Transactions with a value less than or equal to 1000 are approved.
+- Emits `transaction-validated` events with the updated transaction status.
+
+## Tech Stack
+
+- **NestJS**: Framework for building scalable server-side applications.
+- **Kafka**: Message broker for event-driven communication.
+- **TypeScript**: Strongly typed programming language.
+
+## Folder Structure
+
+- `src/validator`: Contains the core logic for validating transactions.
+  - `validator.service.ts`: Handles transaction validation logic.
+  - `validator.controller.ts`: Listens to Kafka events and triggers validation.
+  - `dto/validator.dto.ts`: Defines the data structure for transaction validation.
+
+## How It Works
+
+1. The service listens to the `transaction-created` Kafka topic.
+2. When a transaction is created, the service validates it:
+   - If the transaction value is greater than 1000, it is marked as `REJECTED`.
+   - Otherwise, it is marked as `APPROVED`.
+3. The service emits a `transaction-validated` event with the transaction's updated status.
+
+## Environment Variables
+
+Ensure the following environment variables are set:
+
+- `KAFKA_BROKERS`: Kafka broker addresses (e.g., `localhost:9092`).
+
+## Running the Service
+
+1. Install dependencies:
+
+   ```bash
+   npm install
+
+2. Start the service in development mode:
+
+   ```bash
+   npm run start:dev
+
+3. Build the service:
+
+   ```bash
+   npm run build
+
+## Kafka Topics
+* Input: transaction-created
+  ```json
+  {
+    "transactionExternalId": "123e4567-e89b-12d3-a456-426614174000",
+    "value": 1500
+  }
+
+* Output: transaction-validated
+  ```json
+  {
+    "transactionExternalId": "123e4567-e89b-12d3-a456-426614174000",
+    "status": "REJECTED"
+  }
+
+

ms-antifraud-rules/eslint.config.mjs

@@ -0,0 +1,37 @@
+// @ts-check
+import eslint from '@eslint/js';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+import globals from 'globals';
+import tseslint from 'typescript-eslint';
+
+export default tseslint.config(
+  {
+    ignores: ['eslint.config.mjs'],
+  },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
+  eslintPluginPrettierRecommended,
+  {
+    languageOptions: {
+      globals: {
+        ...globals.node,
+        ...globals.jest,
+      },
+      ecmaVersion: 5,
+      sourceType: 'module',
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+  },
+  {
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-floating-promises': 'off',
+      '@typescript-eslint/no-unsafe-argument': 'off',
+      '@typescript-eslint/no-unsafe-member-access': 'off',
+      'prettier/prettier': 'off'
+    },
+  },
+);

ms-antifraud-rules/nest-cli.json

@@ -0,0 +1,8 @@
+{
+  "$schema": "https://json.schemastore.org/nest-cli",
+  "collection": "@nestjs/schematics",
+  "sourceRoot": "src",
+  "compilerOptions": {
+    "deleteOutDir": true
+  }
+}