Intelligent ratelimit#121
Conversation
…and implement rate limit routes
WalkthroughA comprehensive, multi-file implementation introduces an advanced rate limiting system. The changes add intelligent, role- and merchant-aware rate limiting middleware, persistent configuration and monitoring, burst mode, adaptive limit adjustment, whitelist/blacklist management, fraud detection integration, alerting, and a full-featured API for monitoring and administration. Extensive tests and documentation are included. Changes
Sequence Diagram(s)sequenceDiagram
participant Client
participant ExpressApp
participant intelligentRateLimiter
participant whitelistBlacklistService
participant rateLimitConfigService
participant adaptiveRateLimitService
participant rateLimitMonitoringService
participant FraudDetectionService
participant Redis
Client->>ExpressApp: HTTP request
ExpressApp->>intelligentRateLimiter: pass request
intelligentRateLimiter->>whitelistBlacklistService: check whitelist/blacklist
alt Blacklisted
intelligentRateLimiter-->>ExpressApp: Block (429)
else Whitelisted
intelligentRateLimiter-->>ExpressApp: Allow (no limit)
else Not listed
intelligentRateLimiter->>rateLimitConfigService: fetch config for user/merchant/role
intelligentRateLimiter->>Redis: check burst mode state
alt Over limit & burst available
intelligentRateLimiter->>Redis: activate burst mode
intelligentRateLimiter-->>ExpressApp: Allow burst traffic
else Over limit & no burst
intelligentRateLimiter->>rateLimitMonitoringService: log event (throttled)
intelligentRateLimiter-->>ExpressApp: Block (429)
else Under limit
intelligentRateLimiter->>rateLimitMonitoringService: log event (normal)
intelligentRateLimiter-->>ExpressApp: Allow
end
end
ExpressApp->>rateLimitMonitoringService: Middleware logs event
adaptiveRateLimitService->>rateLimitConfigService: Periodically adjust limits
rateLimitMonitoringService->>FraudDetectionService: Trigger fraud check if suspicious
Estimated code review effort🎯 5 (Critical) | ⏱️ ~90 minutes Assessment against linked issues
Assessment against linked issues: Out-of-scope changes
Suggested reviewers
Poem
Note ⚡️ Unit Test Generation is now available in beta!Learn more here, or try it out under "Finishing Touches" below. ✨ Finishing Touches
🧪 Generate unit tests
Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out. 🪧 TipsChatThere are 3 ways to chat with CodeRabbit:
SupportNeed help? Create a ticket on our support page for assistance with any issues or questions. Note: Be mindful of the bot's finite context window. It's strongly recommended to break down tasks such as reading entire modules into smaller chunks. For a focused discussion, use review comments to chat about specific files and their changes, instead of using the PR comments. CodeRabbit Commands (Invoked using PR comments)
Other keywords and placeholders
CodeRabbit Configuration File (
|
![coderabbitai[bot]](https://avatars.githubusercontent.com/in/347564?s=60&v=4){kind=small}
There was a problem hiding this comment.
Actionable comments posted: 24
🔭 Outside diff range comments (1)
src/app.ts (1)
77-77: Critical: Remove duplicate rate limit monitoring middleware.There are two rate limit monitoring middlewares being added - one on line 77 and another on line 82. This duplication will cause unnecessary overhead and potentially conflicting behavior.
app.use( RateLimitMonitoringService.createRateLimitMonitoringMiddleware() as RequestHandler, ); app.use(globalRateLimiter as RequestHandler); app.use(requestLogger as RequestHandler); app.use(intelligentRateLimiter); -app.use(rateLimitMonitoringService.createRateLimitMonitoringMiddleware());Keep only one instance of the rate limit monitoring middleware. If the newer instance (line 82) has additional features, remove the older one (line 77) instead.
Also applies to: 82-82
🧹 Nitpick comments (11)
src/services/rateLimitAlertService.ts (1)
32-47: Consider using aggregated data instead of single latest entry.Using only the latest entry to calculate usage percentage may not accurately represent the user's current rate limit usage. Consider aggregating request counts over the time window for a more accurate assessment.
src/config/rateLimitConfig.ts (1)
37-38: Consider differentiating burst settings across tiers.All tiers currently use identical burst settings (2x multiplier, 30s duration). Enterprise customers might benefit from higher burst multipliers or longer durations to better accommodate legitimate traffic spikes.
basic: { // ... existing config burstMultiplier: 2, burstDurationSeconds: 30, }, premium: { // ... existing config - burstMultiplier: 2, - burstDurationSeconds: 30, + burstMultiplier: 3, + burstDurationSeconds: 60, }, enterprise: { // ... existing config - burstMultiplier: 2, - burstDurationSeconds: 30, + burstMultiplier: 5, + burstDurationSeconds: 120, },Also applies to: 49-50, 61-62
src/entities/RateLimitHistory.ts (2)
14-35: Consider adding compound indexes for common query patterns.While individual indexes are good, compound indexes on frequently queried field combinations could improve performance for common use cases like user-merchant queries or time-based filtering by entity.
@Entity("rate_limit_history") +@Index(["userId", "merchantId", "timestamp"]) +@Index(["ip", "timestamp"]) +@Index(["endpoint", "timestamp"]) export class RateLimitHistory {
52-54: Consider data retention strategy for history table.Rate limit history can accumulate rapidly. Consider implementing a data retention policy or partitioning strategy to manage table size and maintain query performance over time.
src/entities/RateLimitBlacklist.ts (1)
34-36: Consider IP address validation and CIDR support.For IP-type blacklist entries, consider adding validation to ensure proper IP address format. Additionally, you might want to support CIDR notation for blocking IP ranges rather than individual IPs.
This could be implemented at the service layer or with custom validation decorators to ensure IP addresses are valid and potentially support CIDR ranges like "192.168.1.0/24".
src/config/swagger.ts (1)
797-803: Remove redundant route inclusion.The pattern
"./src/routes/*.ts"on line 798 already includes all TypeScript files in the routes directory, making the explicit inclusion of"./src/routes/rateLimitRoutes.ts"on line 799 redundant.apis: [ "./src/routes/*.ts", - "./src/routes/rateLimitRoutes.ts", "./src/controllers/*.ts", "./src/dtos/*.ts", "./src/entities/*.ts", ],src/services/whitelistBlacklistService.ts (1)
69-96: Consider extracting common logic between whitelist and blacklist checks.The
isWhitelistedandisBlacklistedmethods have nearly identical logic. Consider creating a shared helper method to reduce code duplication.private async checkListEntry<T extends { isActive: boolean; expiresAt?: Date | null }>( repository: Repository<T>, type: WhitelistType | BlacklistType, value: string, listName: string ): Promise<boolean> { try { const now = new Date(); const entry = await repository.findOne({ where: { type, value, isActive: true, } as any, }); if (!entry) { return false; } // Check if entry has expired if (entry.expiresAt && entry.expiresAt < now) { entry.isActive = false; await repository.save(entry); return false; } return true; } catch (error) { logger.error(`Error checking ${listName}: ${error}`); return false; } } async isWhitelisted(type: WhitelistType, value: string): Promise<boolean> { return this.checkListEntry(this.whitelistRepository, type, value, "whitelist"); } async isBlacklisted(type: BlacklistType, value: string): Promise<boolean> { return this.checkListEntry(this.blacklistRepository, type, value, "blacklist"); }src/middleware/rateLimiter.ts (1)
219-231: Extract shared merchant type determination logic.The
determineMerchantTypefunction appears to be duplicated across services (as mentioned in the AI summary). Consider extracting this into a shared utility.Create a shared utility file
src/utils/merchantTypeHelper.ts:export function determineMerchantType(merchant: any): string { if (!merchant) return "standard"; if (merchant.business_name) { const businessName = merchant.business_name.toLowerCase(); if (businessName.includes("enterprise")) { return "enterprise"; } if (businessName.includes("premium")) { return "premium"; } } return "standard"; }Then import and use it in both this file and
rateLimitMonitoringService.src/services/rateLimitConfigService.ts (3)
156-159: Add validation for rate limit value consistencyThe method should validate that rate limit values are positive and follow a logical hierarchy.
if (!configData.requestsPerSecond || !configData.requestsPerMinute || !configData.requestsPerHour || !configData.requestsPerDay) { throw new Error("All rate limit values are required"); } + + // Validate positive values + if (configData.requestsPerSecond <= 0 || configData.requestsPerMinute <= 0 || + configData.requestsPerHour <= 0 || configData.requestsPerDay <= 0) { + throw new Error("Rate limit values must be positive"); + } + + // Validate logical hierarchy + if (configData.requestsPerSecond > configData.requestsPerMinute || + configData.requestsPerMinute > configData.requestsPerHour || + configData.requestsPerHour > configData.requestsPerDay) { + throw new Error("Rate limit values must follow logical hierarchy (second < minute < hour < day)"); + }
227-254: Consider bulk operations for better performanceThe current implementation makes individual database queries for each user role. Consider using bulk operations for better performance when dealing with many roles.
- for (const role of userRoles) { - // Check if config already exists - const existingConfig = await this.configRepository.findOne({ - where: { - merchantId, - userRole: role, - isActive: true, - }, - }); - - if (!existingConfig) { - const defaultLimits = this.getDefaultLimits(role, merchantType); - - await this.createConfig({ - merchantId, - userRole: role, - merchantType, - requestsPerSecond: defaultLimits.limits.requestsPerSecond, - requestsPerMinute: defaultLimits.limits.requestsPerMinute, - requestsPerHour: defaultLimits.limits.requestsPerHour, - requestsPerDay: defaultLimits.limits.requestsPerDay, - burstMultiplier: defaultLimits.burstMultiplier, - burstDurationSeconds: defaultLimits.burstDurationSeconds, - }); - - logger.info(`Created default rate limit config for merchant ${merchantId}, role ${role}`); - } - } + // Check existing configs in bulk + const existingConfigs = await this.configRepository.find({ + where: { + merchantId, + userRole: In(userRoles), + isActive: true, + }, + }); + + const existingRoles = new Set(existingConfigs.map(c => c.userRole)); + const newConfigs = []; + + for (const role of userRoles) { + if (!existingRoles.has(role)) { + const defaultLimits = this.getDefaultLimits(role, merchantType); + + newConfigs.push(this.configRepository.create({ + merchantId, + userRole: role, + merchantType, + requestsPerSecond: defaultLimits.limits.requestsPerSecond, + requestsPerMinute: defaultLimits.limits.requestsPerMinute, + requestsPerHour: defaultLimits.limits.requestsPerHour, + requestsPerDay: defaultLimits.limits.requestsPerDay, + burstMultiplier: defaultLimits.burstMultiplier, + burstDurationSeconds: defaultLimits.burstDurationSeconds, + })); + } + } + + if (newConfigs.length > 0) { + await this.configRepository.save(newConfigs); + logger.info(`Created ${newConfigs.length} default rate limit configs for merchant ${merchantId}`); + }Note: You'll need to import
Infrom TypeORM:import { Repository, In } from "typeorm";
268-276: Consider transaction semantics for bulk updatesThe current implementation applies updates individually and continues even if some fail, which could lead to inconsistent state. Consider whether all updates should succeed or fail together.
If partial updates are intentional, document this behavior clearly. Otherwise, consider wrapping the updates in a transaction:
async bulkUpdateConfigs( merchantId: string, updates: Array<{ configId: string; updates: Partial<RateLimitConfig> }> ): Promise<RateLimitConfig[]> { - const updatedConfigs: RateLimitConfig[] = []; - - for (const update of updates) { - try { - const config = await this.updateConfig(update.configId, update.updates); - updatedConfigs.push(config); - } catch (error) { - logger.error(`Error updating config ${update.configId}: ${error}`); - // Continue with other updates even if one fails - } - } - - return updatedConfigs; + return await AppDataSource.transaction(async manager => { + const updatedConfigs: RateLimitConfig[] = []; + + for (const update of updates) { + const config = await manager.findOne(RateLimitConfig, { + where: { id: update.configId }, + }); + + if (!config) { + throw new Error(`Rate limit configuration ${update.configId} not found`); + } + + Object.assign(config, update.updates); + const updated = await manager.save(config); + updatedConfigs.push(updated); + } + + return updatedConfigs; + }); }
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (24)
package.json(0 hunks)src/app.ts(2 hunks)src/config/db.ts(2 hunks)src/config/rateLimitConfig.ts(1 hunks)src/config/swagger.ts(2 hunks)src/controllers/RateLimitController.ts(1 hunks)src/entities/RateLimitBlacklist.ts(1 hunks)src/entities/RateLimitConfig.ts(1 hunks)src/entities/RateLimitHistory.ts(1 hunks)src/entities/RateLimitWhiteList.ts(1 hunks)src/index.ts(1 hunks)src/middleware/rateLimiter.ts(1 hunks)src/routes/index.ts(2 hunks)src/routes/rateLimitRoutes.ts(1 hunks)src/services/FraudDetectionService.ts(2 hunks)src/services/WalletService.ts(1 hunks)src/services/adaptiveRateLimitService.ts(1 hunks)src/services/rateLimitAlertService.ts(1 hunks)src/services/rateLimitConfigService.ts(1 hunks)src/services/rateLimitMonitoring.service.ts(3 hunks)src/services/whitelistBlacklistService.ts(1 hunks)src/tests/rateLimiter.test.ts(1 hunks)src/tests/services/FraudDetectionService.test.ts(0 hunks)src/tests/services/fraudDetectionServices.ts(1 hunks)
💤 Files with no reviewable changes (2)
- package.json
- src/tests/services/FraudDetectionService.test.ts
🧰 Additional context used
🧬 Code Graph Analysis (6)
src/services/rateLimitAlertService.ts (1)
src/config/redisConfig.ts (1)
redisClient(78-78)
src/entities/RateLimitConfig.ts (2)
src/entities/RateLimitBlacklist.ts (1)
Entity(23-62)src/entities/RateLimitHistory.ts (1)
Entity(9-55)
src/entities/RateLimitBlacklist.ts (1)
src/entities/RateLimitWhiteList.ts (1)
Entity(16-48)
src/tests/services/fraudDetectionServices.ts (1)
src/services/FraudDetectionService.ts (1)
FraudDetectionService(22-708)
src/entities/RateLimitHistory.ts (3)
src/entities/RateLimitBlacklist.ts (1)
Entity(23-62)src/entities/RateLimitConfig.ts (1)
Entity(12-56)src/entities/RateLimitWhiteList.ts (1)
Entity(16-48)
src/services/rateLimitMonitoring.service.ts (2)
src/config/redisConfig.ts (1)
redisClient(78-78)src/scripts/simpleTest.js (1)
service(139-139)
🔇 Additional comments (40)
src/config/db.ts (2)
18-18: LGTM! Import path correction is good practice.The change from absolute to relative import path for the Wallet entity improves consistency and maintainability.
19-19: LGTM! Transaction entity integration is necessary for fraud detection.Adding the Transaction entity to the data source configuration is required for the new fraud detection features that analyze transaction patterns as part of rate limiting.
Also applies to: 49-49
src/routes/index.ts (1)
10-10: LGTM! Rate limit routes properly integrated.The import and route registration for rate limit endpoints is correct and follows the established patterns in the codebase.
Also applies to: 24-24
src/app.ts (2)
43-44: LGTM! Necessary imports for rate limiting functionality.The imports for intelligent rate limiter and monitoring service are correctly added to support the new rate limiting features.
81-81: LGTM! Intelligent rate limiter middleware properly integrated.The intelligent rate limiter middleware is correctly positioned in the middleware stack after request logging.
src/entities/RateLimitWhiteList.ts (1)
1-48: Well-designed TypeORM entity with appropriate structure.The entity follows TypeORM best practices with proper use of decorators, indexes, and data types. The unique index on the
valuefield prevents duplicate entries, and the optionalexpiresAtfield provides flexibility for temporary whitelisting.src/config/rateLimitConfig.ts (1)
3-14: Well-structured interface design for rate limiting configuration.The
RateLimitTierinterface provides comprehensive rate limiting parameters across multiple time windows, with burst support. This design allows for flexible and granular rate limit management.src/entities/RateLimitHistory.ts (1)
9-55: Well-designed entity for comprehensive rate limit tracking.The entity captures all necessary rate limiting metrics with appropriate indexing for query performance. The combination of optional and required fields provides flexibility while maintaining data integrity.
src/entities/RateLimitBlacklist.ts (2)
10-21: Well-defined enums for blacklist categorization.The
BlacklistTypeandBlacklistReasonenums provide clear categorization for blacklist entries. The reason enum covers the main use cases including automated fraud detection scenarios.
23-62: Consistent entity design with whitelist counterpart.The entity structure mirrors the whitelist entity appropriately, maintaining consistency in the rate limiting system. The unique index on
valueand expiration support provide necessary functionality.src/entities/RateLimitConfig.ts (4)
1-11: LGTM!The imports are properly organized and include all necessary TypeORM decorators for entity definition.
12-16: LGTM!Entity setup follows best practices with UUID primary key and appropriate table naming.
17-23: LGTM!The merchant relationship is properly configured with foreign key constraints.
24-56: LGTM!Column definitions are well-structured with appropriate types, defaults, and nullable configurations. The automatic timestamp management is properly configured.
src/services/adaptiveRateLimitService.ts (3)
1-13: LGTM!Imports are well-organized with proper use of type imports.
46-56: LGTM!The stopAdjustment method properly handles cron job cleanup.
60-91: Use radix parameter with parseInt.Always specify the radix parameter when using
parseIntto avoid potential parsing issues.- const total = Number.parseInt(totalRequests, 10) - const throttled = Number.parseInt(throttledRequests, 10) + const total = Number.parseInt(totalRequests, 10) + const throttled = Number.parseInt(throttledRequests, 10)Wait, the code already includes the radix parameter (10). This is correct.
src/routes/rateLimitRoutes.ts (3)
1-7: LGTM!Imports are properly organized for route definition with authentication and authorization.
353-1176: LGTM!Route definitions are well-structured with proper authentication, authorization, and RESTful design patterns. The separation of monitoring endpoints (accessible to all authenticated users) and management endpoints (admin-only) is appropriate.
53-102: Fix schema inconsistency with entity definition.The Swagger schema for
RateLimitConfigshowsbusinessTypeas a required field, but the actual entity usesmerchantTypeas an optional field. This inconsistency could cause confusion for API consumers.* required: * - merchantId - * - businessType * - requestsPerSecond * - requestsPerMinute * - requestsPerHour * - requestsPerDay * - burstMultiplier * - burstDurationSeconds * properties: * id: * type: string * format: uuid * description: Unique identifier for the configuration. * merchantId: * type: string * description: The ID of the merchant this configuration applies to. - * businessType: + * merchantType: * type: string * enum: [standard, premium, enterprise] - * description: The business type of the merchant, influencing default limits. + * description: The merchant type, influencing default limits. + * nullable: true + * userRole: + * type: string + * description: The user role this configuration applies to. + * nullable: trueLikely an incorrect or invalid review comment.
src/tests/services/fraudDetectionServices.ts (2)
43-91: LGTM!Test setup is well-structured with comprehensive default configurations and proper mock cleanup between tests.
92-145: LGTM!The
checkRateLimitingPatternstests provide good coverage of different abuse scenarios with appropriate assertions for risk scores and triggered rules.src/tests/rateLimiter.test.ts (5)
1-91: LGTM!Excellent mock setup with accurate type definitions and proper ordering of mocks before importing the module under test. The comprehensive mock interfaces ensure type safety in tests.
100-199: LGTM!Well-structured test helpers and setup with comprehensive default configurations. The
simulateRateLimitExceededhelper effectively simulates rate limit conditions.
200-257: LGTM!Basic rate limit tests provide good coverage of different user scenarios, dynamic configurations, and whitelist/blacklist handling.
259-306: LGTM!Comprehensive burst mode test that properly verifies Redis interactions, response headers, and burst limit calculations.
308-368: LGTM!The advanced logging and skip paths tests provide good coverage with proper verification of monitoring service calls and path exclusion logic.
src/services/FraudDetectionService.ts (1)
18-20: LGTM! Imports are well-organized.The new imports for whitelist/blacklist service and related entities are correctly added and follow the existing import structure.
src/config/swagger.ts (1)
445-788: Excellent Swagger schema definitions!The new rate limiting schemas are comprehensive, well-structured, and properly documented. They cover all aspects of the rate limiting feature with appropriate types, descriptions, and required field definitions.
src/controllers/RateLimitController.ts (2)
11-31: Well-structured endpoint with proper error handling!The metrics endpoint demonstrates good practices:
- Validates query parameters with defaults
- Proper error handling with environment-based error exposure
- Clear response structure
78-85: Excellent input validation!The limit parameter validation is thorough, checking for:
- Valid number parsing
- Minimum value (1)
- Maximum value (1000)
This prevents potential abuse and ensures reasonable response sizes.
src/middleware/rateLimiter.ts (2)
25-93: Excellent implementation of dynamic rate limiting!The intelligent rate limiter demonstrates several best practices:
- Comprehensive blacklist/whitelist checks with proper precedence
- Dynamic limits based on user context and configuration
- Burst mode support with Redis state management
- Proper error handling with fallback defaults
- Clear separation of authenticated vs unauthenticated limits
127-209: Well-implemented custom rate limit handler!The handler includes:
- Detailed logging of rate limit events
- Automatic burst mode activation
- Comprehensive response headers
- Structured error responses with context
- Proper error handling with fallback
src/services/rateLimitConfigService.ts (2)
112-128: LGTM!The method correctly creates a default configuration object with appropriate fallbacks.
171-182: LGTM!Good implementation of soft delete pattern, preserving data integrity while marking configurations as inactive.
src/services/rateLimitMonitoring.service.ts (5)
25-33: LGTM!The
AdvancedRateLimitEventinterface provides comprehensive monitoring data with all necessary fields.
47-57: LGTM!Excellent handling of AppDataSource initialization with proper error handling.
72-107: LGTM!Well-implemented method with proper error handling, backward compatibility, and conditional database persistence.
239-335: LGTM!Comprehensive metrics calculation with proper grouping, rate calculations, and error handling.
357-410: LGTM!Well-implemented aggregation queries with proper error handling and fallbacks.
| import RateLimitMonitoringService from "../services/rateLimitMonitoring.service"; | ||
| import rateLimitConfigService from "../services/rateLimitConfigService"; | ||
| import whitelistBlacklistService from "../services/whitelistBlacklistService"; | ||
| import { WhitelistType } from "src/entities/RateLimitWhiteList"; |
There was a problem hiding this comment.
Fix relative import path.
The import uses src/ prefix which may cause issues in some build configurations. Use a relative path instead.
-import { WhitelistType } from "src/entities/RateLimitWhiteList";
+import { WhitelistType } from "../entities/RateLimitWhiteList";📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| import { WhitelistType } from "src/entities/RateLimitWhiteList"; | |
| import { WhitelistType } from "../entities/RateLimitWhiteList"; |
🤖 Prompt for AI Agents
In src/controllers/RateLimitController.ts at line 5, the import statement uses
an absolute path starting with 'src/', which can cause issues in some build
setups. Change the import to use a relative path to the RateLimitWhiteList
entity file, adjusting the path accordingly based on the file's location
relative to src/controllers.
| import "reflect-metadata"; | ||
| import app from "./app"; | ||
| import AppDataSource from "./config/db"; | ||
| import adaptiveRateLimitService from "./services/adaptiveRateLimitService"; |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Add error handling for adaptive rate limit service initialization.
The placement of the adaptive rate limit service initialization is correct (after DB, before server start), but consider adding error handling around the service start call to prevent startup failures.
console.log("✅ Database connected successfully");
- adaptiveRateLimitService.startAdjustment();
+ try {
+ adaptiveRateLimitService.startAdjustment();
+ console.log("✅ Adaptive rate limit service started");
+ } catch (error) {
+ console.error("❌ Failed to start adaptive rate limit service:", error);
+ // Consider whether this should be fatal or just logged
+ }Also applies to: 11-11
🤖 Prompt for AI Agents
In src/index.ts at line 4 and also line 11, the adaptiveRateLimitService
initialization lacks error handling which could cause startup failures. Wrap the
adaptiveRateLimitService start call in a try-catch block to catch any errors
during initialization. Log the error and handle it gracefully to prevent the
entire application from crashing during startup.
| constructor() { | ||
| if (AppDataSource.isInitialized) { | ||
| this.configRepo = AppDataSource.getRepository(RateLimitConfig) | ||
| this.historyRepo = AppDataSource.getRepository(RateLimitHistory) | ||
| } else { | ||
| AppDataSource.initialize() | ||
| .then(() => { | ||
| this.configRepo = AppDataSource.getRepository(RateLimitConfig) | ||
| this.historyRepo = AppDataSource.getRepository(RateLimitHistory) | ||
| }) | ||
| .catch((error) => { | ||
| logger.error("Failed to initialize AdaptiveRateLimitService repositories:", error) | ||
| }) | ||
| } | ||
| } |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Handle repository initialization failure more robustly.
If the AppDataSource initialization fails in the constructor, the repositories remain undefined, which will cause runtime errors when other methods try to use them. Consider either:
- Throwing an error to prevent service instantiation
- Implementing a retry mechanism
- Setting a flag to indicate initialization failure
class AdaptiveRateLimitService {
private configRepo: Repository<RateLimitConfig>
private historyRepo: Repository<RateLimitHistory>
private cronTask: cron.ScheduledTask | null = null
+ private isInitialized: boolean = false
constructor() {
if (AppDataSource.isInitialized) {
this.configRepo = AppDataSource.getRepository(RateLimitConfig)
this.historyRepo = AppDataSource.getRepository(RateLimitHistory)
+ this.isInitialized = true
} else {
AppDataSource.initialize()
.then(() => {
this.configRepo = AppDataSource.getRepository(RateLimitConfig)
this.historyRepo = AppDataSource.getRepository(RateLimitHistory)
+ this.isInitialized = true
})
.catch((error) => {
logger.error("Failed to initialize AdaptiveRateLimitService repositories:", error)
+ throw new Error("AdaptiveRateLimitService initialization failed")
})
}
}📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| constructor() { | |
| if (AppDataSource.isInitialized) { | |
| this.configRepo = AppDataSource.getRepository(RateLimitConfig) | |
| this.historyRepo = AppDataSource.getRepository(RateLimitHistory) | |
| } else { | |
| AppDataSource.initialize() | |
| .then(() => { | |
| this.configRepo = AppDataSource.getRepository(RateLimitConfig) | |
| this.historyRepo = AppDataSource.getRepository(RateLimitHistory) | |
| }) | |
| .catch((error) => { | |
| logger.error("Failed to initialize AdaptiveRateLimitService repositories:", error) | |
| }) | |
| } | |
| } | |
| class AdaptiveRateLimitService { | |
| private configRepo: Repository<RateLimitConfig> | |
| private historyRepo: Repository<RateLimitHistory> | |
| private cronTask: cron.ScheduledTask | null = null | |
| private isInitialized: boolean = false | |
| constructor() { | |
| if (AppDataSource.isInitialized) { | |
| this.configRepo = AppDataSource.getRepository(RateLimitConfig) | |
| this.historyRepo = AppDataSource.getRepository(RateLimitHistory) | |
| this.isInitialized = true | |
| } else { | |
| AppDataSource.initialize() | |
| .then(() => { | |
| this.configRepo = AppDataSource.getRepository(RateLimitConfig) | |
| this.historyRepo = AppDataSource.getRepository(RateLimitHistory) | |
| this.isInitialized = true | |
| }) | |
| .catch((error) => { | |
| logger.error("Failed to initialize AdaptiveRateLimitService repositories:", error) | |
| throw new Error("AdaptiveRateLimitService initialization failed") | |
| }) | |
| } | |
| } | |
| } |
🤖 Prompt for AI Agents
In src/services/adaptiveRateLimitService.ts around lines 14 to 28, the
constructor initializes repositories asynchronously but does not handle
initialization failure robustly, leaving repositories undefined and causing
runtime errors. Modify the constructor to either throw an error if
AppDataSource.initialize() fails, implement a retry mechanism for
initialization, or set a flag indicating initialization failure so that other
methods can check this flag before accessing the repositories, preventing
undefined usage.
| // /** | ||
| // * Starts the periodic adjustment of rate limits using a cron job. | ||
| // * @param cronSchedule The cron schedule string (e.g., \'*/ 5; | ||
|
|
||
| public startAdjustment(cronSchedule = "*/5 * * * *"): void { | ||
| if (this.cronTask) { | ||
| logger.warn("Adaptive rate limit adjustment cron job already running.") | ||
| return | ||
| } | ||
| logger.info(`Starting adaptive rate limit adjustment cron job with schedule: '${cronSchedule}'.`) | ||
| this.cronTask = cron.schedule(cronSchedule, () => this.adjustLimits(), { | ||
| scheduled: true, | ||
| timezone: "UTC", | ||
| }) | ||
| } |
There was a problem hiding this comment.
Remove incomplete JSDoc comment.
The JSDoc comment is incomplete and should be removed or properly completed.
-// /**
-// * Starts the periodic adjustment of rate limits using a cron job.
-// * @param cronSchedule The cron schedule string (e.g., \'*/ 5;
-
+ /**
+ * Starts the periodic adjustment of rate limits using a cron job.
+ * @param cronSchedule The cron schedule string (e.g., '*/5 * * * *' for every 5 minutes)
+ */
public startAdjustment(cronSchedule = "*/5 * * * *"): void {📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| // /** | |
| // * Starts the periodic adjustment of rate limits using a cron job. | |
| // * @param cronSchedule The cron schedule string (e.g., \'*/ 5; | |
| public startAdjustment(cronSchedule = "*/5 * * * *"): void { | |
| if (this.cronTask) { | |
| logger.warn("Adaptive rate limit adjustment cron job already running.") | |
| return | |
| } | |
| logger.info(`Starting adaptive rate limit adjustment cron job with schedule: '${cronSchedule}'.`) | |
| this.cronTask = cron.schedule(cronSchedule, () => this.adjustLimits(), { | |
| scheduled: true, | |
| timezone: "UTC", | |
| }) | |
| } | |
| /** | |
| * Starts the periodic adjustment of rate limits using a cron job. | |
| * @param cronSchedule The cron schedule string (e.g., '*/5 * * * *' for every 5 minutes) | |
| */ | |
| public startAdjustment(cronSchedule = "*/5 * * * *"): void { | |
| if (this.cronTask) { | |
| logger.warn("Adaptive rate limit adjustment cron job already running.") | |
| return | |
| } | |
| logger.info(`Starting adaptive rate limit adjustment cron job with schedule: '${cronSchedule}'.`) | |
| this.cronTask = cron.schedule(cronSchedule, () => this.adjustLimits(), { | |
| scheduled: true, | |
| timezone: "UTC", | |
| }) | |
| } |
🤖 Prompt for AI Agents
In src/services/adaptiveRateLimitService.ts around lines 30 to 44, there is an
incomplete JSDoc comment above the startAdjustment method. Remove this
incomplete JSDoc comment entirely or rewrite it to be a complete and clear JSDoc
block describing the method, its parameters, and behavior.
| const throttleRate = (throttled / total) * 100 | ||
|
|
||
| const config = await this.configRepo.findOne({ where: { merchantId } }) | ||
|
|
||
| if (!config) { | ||
| logger.warn(`No specific config found for merchant ${merchantId}. Skipping adjustment.`) | ||
| continue | ||
| } | ||
|
|
||
| let updated = false | ||
| let newRequestsPerMinute = config.requestsPerMinute | ||
| const adjustmentFactor = 0.05 // 5% adjustment | ||
|
|
||
| if (throttleRate < 1) { | ||
| newRequestsPerMinute = Math.ceil(config.requestsPerMinute * (1 + adjustmentFactor)) | ||
| logger.info( | ||
| `Merchant ${merchantId} (Endpoint: ${endpoint}): Low throttle rate (${throttleRate.toFixed(2)}%). Increasing RPM from ${config.requestsPerMinute} to ${newRequestsPerMinute}.`, | ||
| ) | ||
| updated = true | ||
| } else if (throttleRate > 10) { | ||
| newRequestsPerMinute = Math.floor(config.requestsPerMinute * (1 - adjustmentFactor)) | ||
| newRequestsPerMinute = Math.max(newRequestsPerMinute, 10) // Minimum limit | ||
| logger.warn( | ||
| `Merchant ${merchantId} (Endpoint: ${endpoint}): High throttle rate (${throttleRate.toFixed(2)}%). Decreasing RPM from ${config.requestsPerMinute} to ${newRequestsPerMinute}.`, | ||
| ) | ||
| updated = true | ||
| } else { | ||
| logger.info( | ||
| `Merchant ${merchantId} (Endpoint: ${endpoint}): Stable throttle rate (${throttleRate.toFixed(2)}%). No adjustment needed.`, | ||
| ) | ||
| } | ||
|
|
||
| if (updated && newRequestsPerMinute !== config.requestsPerMinute) { | ||
| const ratio = newRequestsPerMinute / config.requestsPerMinute | ||
| config.requestsPerSecond = Math.max(1, Math.ceil(config.requestsPerSecond * ratio)) | ||
| config.requestsPerHour = Math.max(10, Math.ceil(config.requestsPerHour * ratio)) | ||
| config.requestsPerDay = Math.max(100, Math.ceil(config.requestsPerDay * ratio)) | ||
| config.requestsPerMinute = newRequestsPerMinute | ||
|
|
||
| await rateLimitConfigService.updateConfig(config.id!, config) | ||
| logger.info(`Updated rate limit config for merchant ${merchantId}. New RPM: ${config.requestsPerMinute}`) | ||
| } | ||
| } | ||
| logger.info("Adaptive rate limit adjustment completed.") | ||
| } catch (error) { | ||
| logger.error("Error during adaptive rate limit adjustment:", error) | ||
| } | ||
| } | ||
| } |
There was a problem hiding this comment.
💡 Verification agent
🧩 Analysis chain
Consider endpoint-specific or role-specific rate limit adjustments.
The current implementation adjusts rate limits at the merchant level only, which affects all users and endpoints for that merchant. The endpoint data from the aggregation is logged but not used in the adjustment logic. Consider:
- Making adjustments specific to user roles or merchant types
- Using endpoint-specific adjustments for more granular control
- Ensuring the adjustment doesn't override user-specific or role-specific configurations
🏁 Script executed:
#!/bin/bash
# Check if there are user role or merchant type specific configurations in the RateLimitConfig entity
ast-grep --pattern 'class RateLimitConfig {
$$$
userRole$_
$$$
merchantType$_
$$$
}'
# Check how getConfigForUser handles multiple configs
rg -A 10 "getConfigForUser" src/services/rateLimitConfigService.tsLength of output: 521
Ensure adaptive adjustments respect user roles and endpoints
The current logic in src/services/adaptiveRateLimitService.ts (lines 92–140) fetches and updates only the merchant-level default config:
const config = await this.configRepo.findOne({ where: { merchantId } })
…
await rateLimitConfigService.updateConfig(config.id!, config)The throttling data is broken out by endpoint and you already have a userRole column on RateLimitConfig (used in getConfigForUser), but neither dimension is used here. To support more granular control:
• Add an endpoint field to RateLimitConfig (if not already present) and query/update configs scoped to each endpoint.
• Leverage rateLimitConfigService.getConfigForUser(userId, merchantId, userRole) or a repository filter on userRole to adjust limits per role rather than always touching the merchant default.
• If the intent is to only adjust the merchant-wide default, remove the unused endpoint logs to avoid confusion.
Addressing these will prevent unintended overrides of user- or endpoint-specific rate limits.
🤖 Prompt for AI Agents
In src/services/adaptiveRateLimitService.ts between lines 92 and 140, the
current code fetches and updates only the merchant-level default rate limit
config without considering the endpoint or userRole, which can cause unintended
overrides of more specific limits. To fix this, modify the query to include
filtering by endpoint and userRole, either by using
rateLimitConfigService.getConfigForUser(userId, merchantId, userRole) or by
adding these filters directly in the repository query. Also, update the config
accordingly per endpoint and userRole rather than only merchant-wide. If the
goal is to adjust only the merchant default, remove the endpoint details from
log messages to avoid confusion.
| describe('getRateLimitFraudStats', () => { | ||
| it('should return aggregated rate limit fraud statistics', async () => { | ||
| const mockHistoryData = [ | ||
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, // 6 throttled for userA | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | ||
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, // 11 throttled for IP 2.2.2.2 | ||
| { wasThrottled: false, wasBurst: true, ip: '3.3.3.3', userId: 'userC' }, | ||
| { wasThrottled: false, wasBurst: true, ip: '3.3.3.3', userId: 'userC' }, | ||
| ].map(e => ({ ...e, timestamp: new Date(), merchantId: 'merchant123' })); | ||
|
|
||
| mockRateLimitHistoryRepo.createQueryBuilder().getMany.mockResolvedValue(mockHistoryData as any); | ||
| mockRateLimitHistoryRepo.createQueryBuilder().getRawMany | ||
| .mockResolvedValueOnce([{ ip: '2.2.2.2', count: '11' }]) // suspiciousIPs | ||
| .mockResolvedValueOnce([{ userId: 'userA', count: '6' }]); // suspiciousUsers | ||
|
|
||
| const stats = await service.getRateLimitFraudStats('merchant123', 30); | ||
|
|
||
| expect(stats.totalEvents).toBe(mockHistoryData.length); | ||
| expect(stats.throttledEvents).toBe(11); // 11 IPs, 6 users | ||
| expect(stats.burstEvents).toBe(2); | ||
| expect(stats.suspiciousActivity.suspiciousIPs).toEqual([{ ip: '2.2.2.2', throttledCount: 11 }]); | ||
| expect(stats.suspiciousActivity.suspiciousUsers).toEqual([{ userId: 'userA', throttledCount: 6 }]); | ||
| expect(stats.riskIndicators.highRiskIPs).toBe(1); | ||
| expect(stats.riskIndicators.highRiskUsers).toBe(1); | ||
| }); | ||
| }); |
There was a problem hiding this comment.
Fix incorrect assertion for throttled events count.
The test expects throttledEvents to be 11, but based on the mock data, there are 17 throttled events total (6 for userA + 11 for userB/IP 2.2.2.2).
expect(stats.totalEvents).toBe(mockHistoryData.length);
- expect(stats.throttledEvents).toBe(11); // 11 IPs, 6 users
+ expect(stats.throttledEvents).toBe(17); // 6 for userA + 11 for IP 2.2.2.2
expect(stats.burstEvents).toBe(2);📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| describe('getRateLimitFraudStats', () => { | |
| it('should return aggregated rate limit fraud statistics', async () => { | |
| const mockHistoryData = [ | |
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | |
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | |
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | |
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | |
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, | |
| { wasThrottled: true, wasBurst: false, ip: '1.1.1.1', userId: 'userA' }, // 6 throttled for userA | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, | |
| { wasThrottled: true, wasBurst: false, ip: '2.2.2.2', userId: 'userB' }, // 11 throttled for IP 2.2.2.2 | |
| { wasThrottled: false, wasBurst: true, ip: '3.3.3.3', userId: 'userC' }, | |
| { wasThrottled: false, wasBurst: true, ip: '3.3.3.3', userId: 'userC' }, | |
| ].map(e => ({ ...e, timestamp: new Date(), merchantId: 'merchant123' })); | |
| mockRateLimitHistoryRepo.createQueryBuilder().getMany.mockResolvedValue(mockHistoryData as any); | |
| mockRateLimitHistoryRepo.createQueryBuilder().getRawMany | |
| .mockResolvedValueOnce([{ ip: '2.2.2.2', count: '11' }]) // suspiciousIPs | |
| .mockResolvedValueOnce([{ userId: 'userA', count: '6' }]); // suspiciousUsers | |
| const stats = await service.getRateLimitFraudStats('merchant123', 30); | |
| expect(stats.totalEvents).toBe(mockHistoryData.length); | |
| expect(stats.throttledEvents).toBe(11); // 11 IPs, 6 users | |
| expect(stats.burstEvents).toBe(2); | |
| expect(stats.suspiciousActivity.suspiciousIPs).toEqual([{ ip: '2.2.2.2', throttledCount: 11 }]); | |
| expect(stats.suspiciousActivity.suspiciousUsers).toEqual([{ userId: 'userA', throttledCount: 6 }]); | |
| expect(stats.riskIndicators.highRiskIPs).toBe(1); | |
| expect(stats.riskIndicators.highRiskUsers).toBe(1); | |
| }); | |
| }); | |
| expect(stats.totalEvents).toBe(mockHistoryData.length); | |
| expect(stats.throttledEvents).toBe(17); // 6 for userA + 11 for IP 2.2.2.2 | |
| expect(stats.burstEvents).toBe(2); |
🤖 Prompt for AI Agents
In src/tests/services/fraudDetectionServices.ts around lines 227 to 266, the
test incorrectly asserts that throttledEvents equals 11, but the mock data
actually contains 17 throttled events (6 for userA and 11 for userB/IP 2.2.2.2).
Update the assertion for throttledEvents to expect 17 instead of 11 to correctly
reflect the total throttled events in the mock data.
|
@respp |
There was a problem hiding this comment.
Actionable comments posted: 2
♻️ Duplicate comments (9)
src/tests/services/fraudDetectionServices.ts (2)
23-23: Fix incorrect mock module path.The mock module path for the database configuration is incorrect.
556-556: Fix incorrect assertion for throttled events count.The test expects
throttledEventsto be 11, but based on the mock data, there are 17 throttled events total (6 for userA + 11 for userB/IP 2.2.2.2).src/services/rateLimitConfigService.ts (4)
17-20: Add AppDataSource initialization check in constructorThe constructor should check if
AppDataSourceis initialized before accessing repositories, similar to the pattern used inrateLimitMonitoring.service.ts.
22-26: Remove unuseduserIdparameterThe
userIdparameter is never used in the method. Either remove it or clarify its intended purpose with a comment.
85-105: Consider a more robust merchant type determinationRelying on business name keywords for merchant type classification is fragile and error-prone. A business named "Premium Coffee Shop" would be incorrectly classified as a premium merchant.
321-325: Remove unuseduserIdparameterSimilar to
getConfigForUser, theuserIdparameter is never used in this method.src/controllers/RateLimitController.ts (1)
5-5: Fix relative import path.The import uses
src/prefix which may cause issues in some build configurations. Use a relative path instead.src/services/rateLimitMonitoring.service.ts (2)
293-308: Extract duplicate merchant type determination logicThis method duplicates the exact same logic from
rateLimitConfigService.ts. Consider extracting this to a shared utility function or adding it as a method on theMerchantEntity.
520-521: Avoid using Redis KEYS command in productionThe
KEYScommand blocks Redis while scanning all keys, which can cause performance issues. UseSCANinstead for production environments.
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (22)
src/app.ts(2 hunks)src/config/db.ts(2 hunks)src/config/rateLimitConfig.ts(1 hunks)src/config/swagger.ts(2 hunks)src/controllers/RateLimitController.ts(1 hunks)src/controllers/merchant.controller.ts(1 hunks)src/entities/RateLimitBlacklist.ts(1 hunks)src/entities/RateLimitConfig.ts(1 hunks)src/entities/RateLimitHistory.ts(1 hunks)src/entities/RateLimitWhiteList.ts(1 hunks)src/interfaces/fruadDetection.interface.ts(1 hunks)src/middleware/rateLimiter.ts(2 hunks)src/routes/index.ts(2 hunks)src/routes/rateLimitRoutes.ts(1 hunks)src/services/FraudDetectionService.ts(2 hunks)src/services/adaptiveRateLimitService.ts(1 hunks)src/services/rateLimitAlertService.ts(1 hunks)src/services/rateLimitConfigService.ts(1 hunks)src/services/rateLimitMonitoring.service.ts(3 hunks)src/services/whitelistBlacklistService.ts(1 hunks)src/tests/rateLimiter.test.ts(1 hunks)src/tests/services/fraudDetectionServices.ts(1 hunks)
✅ Files skipped from review due to trivial changes (4)
- src/entities/RateLimitBlacklist.ts
- src/routes/index.ts
- src/config/rateLimitConfig.ts
- src/interfaces/fruadDetection.interface.ts
🚧 Files skipped from review as they are similar to previous changes (10)
- src/config/swagger.ts
- src/services/adaptiveRateLimitService.ts
- src/config/db.ts
- src/app.ts
- src/entities/RateLimitWhiteList.ts
- src/entities/RateLimitConfig.ts
- src/services/whitelistBlacklistService.ts
- src/entities/RateLimitHistory.ts
- src/middleware/rateLimiter.ts
- src/services/rateLimitAlertService.ts
🧰 Additional context used
🧬 Code Graph Analysis (2)
src/tests/services/fraudDetectionServices.ts (1)
src/services/FraudDetectionService.ts (1)
FraudDetectionService(29-758)
src/services/FraudDetectionService.ts (2)
src/dtos/FraudDetection.dto.ts (2)
TransactionContextDTO(46-62)FraudCheckResultDTO(22-44)src/interfaces/fruadDetection.interface.ts (5)
RateLimitFraudStats(28-44)SuspiciousIPResult(1-4)SuspiciousUserResult(6-9)SuspiciousActivity(11-14)SuspiciousUser(16-19)
🪛 GitHub Check: build-and-test
src/services/FraudDetectionService.ts
[warning] 479-479:
'merchantId' is defined but never used. Allowed unused args must match /^_/u
🔇 Additional comments (8)
src/tests/rateLimiter.test.ts (1)
1-506: Well-structured and comprehensive test suite!The test file provides excellent coverage for the rate limiter middleware with:
- Proper mock setup for all dependencies
- Accurate type definitions for mock interfaces
- Comprehensive test cases covering authentication levels, burst mode, whitelist/blacklist handling, and event logging
- Clear test organization and naming
src/routes/rateLimitRoutes.ts (1)
1-1242: Excellent API documentation and security implementation!The rate limit routes are well-structured with:
- Comprehensive Swagger/OpenAPI documentation for all endpoints
- Proper authentication and authorization checks (ADMIN role for sensitive operations)
- Clear schema definitions for all request/response models
- Detailed error response documentation
- Logical grouping of related endpoints
src/services/rateLimitConfigService.ts (1)
174-199: LGTM!The
createConfigmethod properly validates required fields and sets appropriate defaults for optional fields.src/controllers/RateLimitController.ts (2)
71-118: LGTM!The
getUserHistorymethod has comprehensive validation for both the userId and limit parameters, with appropriate bounds checking.
346-390: LGTM!The
addToWhitelistmethod properly validates inputs and safely handles optional user context with optional chaining.src/services/rateLimitMonitoring.service.ts (3)
197-254: LGTM!The
checkForAdvancedSuspiciousActivitymethod correctly implements abuse detection with appropriate thresholds and automatic blacklisting. The TypeORM queries properly useMoreThanOrEqualfor date comparisons.
311-407: LGTM!The
getRateLimitMetricsmethod provides comprehensive metrics with flexible filtering options and proper aggregation of statistics by endpoint and role.
12-25: LGTM!The Express Request interface extension properly declares custom properties with appropriate types.
| async checkRateLimitingPatterns( | ||
| userId: string, | ||
| ip: string, | ||
| merchantId: string, |
There was a problem hiding this comment.
Remove or utilize the unused merchantId parameter
The merchantId parameter is defined but never used in the method. Either remove it or consider using it for merchant-specific rate limiting pattern analysis.
async checkRateLimitingPatterns(
userId: string,
ip: string,
- merchantId: string,
): Promise<{ riskScore: number; rulesTriggered: string[] }> {Or add merchant-specific checks if intended:
// Check for merchant-specific patterns
if (merchantId) {
const merchantPatterns = await rateLimitHistoryRepo.count({
where: {
merchantId,
wasThrottled: true,
timestamp: MoreThanOrEqual(oneHourAgo),
},
});
// Add logic for merchant-specific scoring
}🧰 Tools
🪛 GitHub Check: build-and-test
[warning] 479-479:
'merchantId' is defined but never used. Allowed unused args must match /^_/u
🤖 Prompt for AI Agents
In src/services/FraudDetectionService.ts at line 479, the merchantId parameter
is declared but not used in the method. To fix this, either remove the
merchantId parameter if it is unnecessary, or implement merchant-specific logic
such as querying the rateLimitHistoryRepo for throttling events related to that
merchant within the last hour and incorporate this data into the rate limiting
or pattern analysis logic.
respp
left a comment
respp
left a comment
There was a problem hiding this comment.
Great PR, you’ve implemented everything required in a professional way. Please fix the minor issue I pointed out and the suggestions made by coderabbitai, and yes—it would be greatly appreciated if you could also address the CI errors. This shows your commitment to the project, excellent work!
There was a problem hiding this comment.
With these changes, line 36 (apiKey: merchant.apiKey) will return undefined
There was a problem hiding this comment.
With these changes, line 36 (apiKey: merchant.apiKey) will return undefined
Alright
There was a problem hiding this comment.
Actionable comments posted: 3
🔭 Outside diff range comments (1)
src/services/WalletService.ts (1)
1-1: Fix Prettier formatting with the local CLIThe CI failure shows Prettier isn’t formatting because the global
prettiercommand isn’t available. Please run:npm install --save-dev prettier # ensure the CLI is installed npx prettier --write src/services/WalletService.tsCommit the updated file to satisfy the Prettier check.
🧹 Nitpick comments (2)
src/services/WalletService.ts (2)
86-113: Good type safety improvements with room for refactoring.The explicit type guards for each balance property effectively prevent runtime errors from unexpected Stellar API responses. The defensive programming approach is solid.
Consider extracting the repetitive type checking logic into a helper function for better maintainability:
+const safeAssign = <T>(value: unknown, expectedType: string, defaultValue: T): T => { + return typeof value === expectedType ? value as T : defaultValue; +}; await this.balanceRepository.upsert( { walletId, - assetCode: typeof balance.assetCode === "string" ? balance.assetCode : undefined, - assetIssuer: typeof balance.assetIssuer === "string" ? balance.assetIssuer : undefined, - balance: typeof balance.balance === "string" ? balance.balance : "0", + assetCode: safeAssign(balance.assetCode, "string", undefined), + assetIssuer: safeAssign(balance.assetIssuer, "string", undefined), + balance: safeAssign(balance.balance, "string", "0"), // ... continue for other properties }, ["walletId", "assetCode", "assetIssuer"] );
1-394: Consider the scope relationship to PR objectives.While these type safety improvements are valuable, they appear unrelated to the main PR objective of implementing intelligent rate limiting. Based on past review comments, this service was previously entirely commented out and is now restored with enhancements.
Consider whether these changes should be:
- Part of a separate maintenance PR focused on type safety improvements
- Documented as necessary cleanup work for the rate limiting feature
- Related to resolving the CI build errors mentioned in your comment to @respp
This helps maintain clear PR scope and makes reviews more focused.
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (8)
src/controllers/merchant.controller.ts(1 hunks)src/dtos/CreateMerchantDTO.ts(1 hunks)src/interfaces/auth.interfaces.ts(1 hunks)src/middlewares/authMiddleware.ts(2 hunks)src/middlewares/permissionMiddleware.ts(1 hunks)src/services/WalletService.ts(3 hunks)src/services/rateLimitAlertService.ts(1 hunks)src/types/index.ts(1 hunks)
✅ Files skipped from review due to trivial changes (3)
- src/middlewares/authMiddleware.ts
- src/types/index.ts
- src/middlewares/permissionMiddleware.ts
🚧 Files skipped from review as they are similar to previous changes (2)
- src/controllers/merchant.controller.ts
- src/services/rateLimitAlertService.ts
🧰 Additional context used
🪛 GitHub Actions: CI Pipeline
src/services/WalletService.ts
[warning] 1-1: Prettier formatting check failed. Run 'prettier --write' to fix code style issues.
🔇 Additional comments (2)
src/interfaces/auth.interfaces.ts (1)
9-21: LGTM! Well-designed interface changes for flexible authentication.The modifications to make fields optional and add new token-related properties are well-aligned with the intelligent rate limiting system objectives:
- Making
roleoptional supports flexible rate limiting scenarios where user roles might not always be available- New
tokenExpandjtifields enable token-based rate limiting and fraud detection capabilities- Optional fields provide necessary flexibility for different authentication contexts while maintaining backward compatibility
- The design supports the differentiated rate limiting based on user roles as outlined in the PR objectives
These changes create a more versatile interface that integrates seamlessly with the comprehensive rate limiting, monitoring, and fraud detection infrastructure.
src/services/WalletService.ts (1)
118-136: Excellent error handling and fallback strategy.The improved error handling with
getErrorMessage()and graceful fallback to cached data ensures service availability even when the Stellar network is unreachable. TheassetTypefallback logic on line 128 is particularly well-thought-out, correctly identifying XLM as "native" and other assets as "credit_alphanum4".
| @IsString() | ||
| apiKey: string; |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Consider additional validation and security measures for API key.
The apiKey field lacks format validation beyond type checking. Consider adding length constraints and format validation to ensure API keys meet security standards.
@IsString()
+@Length(32, 64, { message: "API key must be between 32 and 64 characters" })
+@Matches(/^[A-Za-z0-9_-]+$/, { message: "API key contains invalid characters" })
apiKey: string;Additionally, consider whether API keys should be auto-generated server-side rather than client-provided to improve security and prevent weak keys.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| @IsString() | |
| apiKey: string; | |
| @IsString() | |
| @Length(32, 64, { message: "API key must be between 32 and 64 characters" }) | |
| @Matches(/^[A-Za-z0-9_-]+$/, { message: "API key contains invalid characters" }) | |
| apiKey: string; |
🤖 Prompt for AI Agents
In src/dtos/CreateMerchantDTO.ts around lines 17 to 18, the apiKey field
currently only has a string type check without any format or length validation.
Add validation decorators to enforce length constraints and a pattern that
matches the expected API key format to enhance security. Also, review the design
to determine if the API key should be generated server-side instead of being
accepted from the client to prevent weak or insecure keys.
| @IsString() | ||
| secret: string; |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Enhance secret validation and consider security implications.
The secret field requires stronger validation to ensure adequate security. Secrets should meet minimum complexity requirements, and consider whether they should be auto-generated server-side.
@IsString()
+@Length(16, 128, { message: "Secret must be between 16 and 128 characters" })
+@Matches(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]/, {
+ message: "Secret must contain at least one uppercase letter, one lowercase letter, one number, and one special character"
+})
secret: string;Security considerations:
- Secrets in request payloads may be logged or exposed in transit
- Consider auto-generating these server-side and returning them securely
- Ensure proper handling and storage (hashing) of secrets in the backend
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| @IsString() | |
| secret: string; | |
| @IsString() | |
| @Length(16, 128, { message: "Secret must be between 16 and 128 characters" }) | |
| @Matches(/^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[@$!%*?&])[A-Za-z\d@$!%*?&]/, { | |
| message: "Secret must contain at least one uppercase letter, one lowercase letter, one number, and one special character" | |
| }) | |
| secret: string; |
🤖 Prompt for AI Agents
In src/dtos/CreateMerchantDTO.ts around lines 20 to 21, the secret field
currently only checks if the value is a string, which is insufficient for
security. Enhance validation by adding rules to enforce minimum complexity, such
as length, character variety, or pattern requirements. Additionally, review the
design to consider generating the secret server-side instead of accepting it
from the client, and ensure that any secrets handled are stored securely,
preferably hashed, and not exposed in logs or transit.
| for (const stellarTxUnknown of stellarTransactions) { | ||
| // Add a type assertion or guard here based on expected shape | ||
| const stellarTx = stellarTxUnknown as { | ||
| hash: string; | ||
| successful: boolean; | ||
| source_account: string; | ||
| }; |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Consider using type guards instead of type assertions for safer typing.
While the type assertion clarifies the expected structure, it could cause runtime errors if the Stellar API changes. Consider using a type guard for safer handling:
-const stellarTx = stellarTxUnknown as {
- hash: string;
- successful: boolean;
- source_account: string;
-};
+const isStellarTransaction = (tx: unknown): tx is {
+ hash: string;
+ successful: boolean;
+ source_account: string;
+} => {
+ return typeof tx === 'object' && tx !== null &&
+ typeof (tx as any).hash === 'string' &&
+ typeof (tx as any).successful === 'boolean' &&
+ typeof (tx as any).source_account === 'string';
+};
+
+if (!isStellarTransaction(stellarTxUnknown)) {
+ console.warn('Unexpected transaction format from Stellar API');
+ continue;
+}
+const stellarTx = stellarTxUnknown;This approach provides runtime validation and graceful handling of unexpected data formats.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| for (const stellarTxUnknown of stellarTransactions) { | |
| // Add a type assertion or guard here based on expected shape | |
| const stellarTx = stellarTxUnknown as { | |
| hash: string; | |
| successful: boolean; | |
| source_account: string; | |
| }; | |
| for (const stellarTxUnknown of stellarTransactions) { | |
| // Add a type assertion or guard here based on expected shape | |
| - const stellarTx = stellarTxUnknown as { | |
| - hash: string; | |
| - successful: boolean; | |
| - source_account: string; | |
| - }; | |
| + const isStellarTransaction = (tx: unknown): tx is { | |
| + hash: string; | |
| + successful: boolean; | |
| + source_account: string; | |
| + } => { | |
| + return ( | |
| + typeof tx === 'object' && | |
| + tx !== null && | |
| + typeof (tx as any).hash === 'string' && | |
| + typeof (tx as any).successful === 'boolean' && | |
| + typeof (tx as any).source_account === 'string' | |
| + ); | |
| + }; | |
| + | |
| + if (!isStellarTransaction(stellarTxUnknown)) { | |
| + console.warn('Unexpected transaction format from Stellar API'); | |
| + continue; | |
| + } | |
| + const stellarTx = stellarTxUnknown; | |
| // ... use stellarTx.hash, stellarTx.successful, etc. ... | |
| } |
🤖 Prompt for AI Agents
In src/services/WalletService.ts around lines 358 to 364, replace the type
assertion on stellarTxUnknown with a type guard function that checks if the
object has the expected properties (hash, successful, source_account) and their
types. Use this guard to conditionally process stellarTxUnknown only if it
passes the check, otherwise handle the unexpected format gracefully to avoid
runtime errors.
There was a problem hiding this comment.
Actionable comments posted: 0
♻️ Duplicate comments (2)
src/services/rateLimitAlertService.ts (2)
27-29: Add early return after parameter validation.The validation logs a warning but continues execution with invalid parameters, which could lead to unnecessary database queries.
if (!userId || !merchantId) { logger.warn("Invalid parameters provided to checkUserThresholds"); + return; }
50-51: Fix potential division by zero error.The calculation will throw an error if
limitUsedis 0 or null.- const usagePercentage = - (latestEntry.requestCount / latestEntry.limitUsed) * 100; + const usagePercentage = latestEntry.limitUsed > 0 + ? (latestEntry.requestCount / latestEntry.limitUsed) * 100 + : 0;
🧹 Nitpick comments (2)
src/services/rateLimitAlertService.ts (2)
17-24: Consider making alert thresholds configurable.The threshold values are currently hardcoded. Consider loading these from environment variables or a configuration service to allow runtime adjustments without code changes.
constructor() { this.historyRepository = AppDataSource.getRepository(RateLimitHistory); this.thresholds = { - warningThreshold: 80, - criticalThreshold: 95, - cooldownMinutes: 15, + warningThreshold: Number(process.env.RATE_LIMIT_WARNING_THRESHOLD) || 80, + criticalThreshold: Number(process.env.RATE_LIMIT_CRITICAL_THRESHOLD) || 95, + cooldownMinutes: Number(process.env.RATE_LIMIT_ALERT_COOLDOWN_MINUTES) || 15, }; }
28-28: Fix typo in log message.- logger.warn("Invalid paramters provided to checkUserThresholds"); + logger.warn("Invalid parameters provided to checkUserThresholds");
📜 Review details
Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (3)
src/services/WalletService.ts(3 hunks)src/services/rateLimitAlertService.ts(1 hunks)src/types/index.ts(1 hunks)
🚧 Files skipped from review as they are similar to previous changes (2)
- src/types/index.ts
- src/services/WalletService.ts
🧰 Additional context used
🧬 Code Graph Analysis (1)
src/services/rateLimitAlertService.ts (1)
src/config/redisConfig.ts (1)
redisClient(78-78)
⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (1)
- GitHub Check: build-and-test
🔇 Additional comments (1)
src/services/rateLimitAlertService.ts (1)
71-71: Verify if merchant-agnostic cooldown is intentional.The cooldown key doesn't include
merchantId, meaning alerts for the same user across different merchants will be suppressed during the cooldown period. Is this the intended behavior?If you want per-merchant cooldowns, consider:
- const cooldownKey = `ratelimit:alert:${userId}:${level}`; + const cooldownKey = `ratelimit:alert:${userId}:${merchantId}:${level}`;
|
@respp |
respp
left a comment
respp
left a comment
There was a problem hiding this comment.
Great! good job @Benjtalkshow
2 participants
Pull Request Overview
Closes #116
Implement Advanced Rate Limiting and Adaptive Fraud Detection
Description:
This pull request introduces a comprehensive, multi-layered rate limiting and fraud detection system to enhance API security, stability, and resource management. It addresses several key requirements, including dynamic limit adjustments, burst handling, real-time monitoring, and deep integration with fraud detection for automated responses.
Key Features Implemented:
Differentiated & Dynamic Rate Limiting:
Burst Allowance System:
Adaptive Rate Limit Algorithm:
AdaptiveRateLimitServiceperiodically analyzes historical rate limit performance (throttle rates) for merchants and endpoints.Real-time Monitoring Dashboard APIs:
/rate-limit/metrics,/rate-limit/history,/rate-limit/status) to provide real-time and historical insights into rate limit usage, throttled requests, burst activity, and top offenders.Enhanced Fraud Detection Integration:
FraudDetectionServicenow incorporates rate limiting patterns (e.g., excessive throttling, burst abuse, rapid endpoint switching) into its risk scoring.Comprehensive Whitelist/Blacklist Management API:
/rate-limit/whitelist,/rate-limit/blacklist) for administrators to manually manage whitelisted (bypass limits) and blacklisted (blocked) IPs, users, and merchants.Automatic Alerts:
Files Added/Modified:
src/services/adaptiveRateLimitService.ts(NEW)src/middleware/rateLimiter.ts(MODIFIED - dynamic max, burst, handler)src/services/rateLimitMonitoring.service.ts(MODIFIED - advanced logging, suspicious activity, metrics)src/services/FraudDetectionService.ts(MODIFIED - addedcheckRateLimitingPatterns,checkTransactionWithRateLimit,getRateLimitFraudStats)src/controllers/rateLimitController.ts(MODIFIED - added new endpoints for monitoring, config, whitelist/blacklist)src/routes/rateLimitRoutes.ts(NEW - dedicated routes for rate limiting APIs)src/routes/index.ts(MODIFIED - imports and mountsrateLimitRoutes)src/app.ts(MODIFIED - imports and startsadaptiveRateLimitService, applies monitoring middleware)swagger.ts(MODIFIED - added new schemas and updatedapisfor documentation)src/__tests__/rateLimiter.test.ts(NEW - unit tests for rate limiter)Testing Instructions:
npm install).npm test src/tests/rateLimiter.test.ts(orjest). All new tests should pass.GET /rate-limit/metrics).POST/PUT/DELETE /rate-limit/config).POST/DELETE /rate-limit/whitelist,/rate-limit/blacklist).X-RateLimit-*headers in responses.Known Limitations / Future Work:
Test passes
Summary by CodeRabbit
New Features
Bug Fixes
Tests
Chores