idempotency

Driver-based, zero-dependency, fetch-first TypeScript HTTP client. Hooks, retry, redirect security, RFC 9111 cache, RFC 6265 cookies, Idempotency-Key on retry, RFC 9457 problem+json, circuit breaker, SSE/NDJSON, OpenAPI types. Node ≥ 22, Bun, Deno, Cloudflare Workers, browsers.

🛵 📬 ‎‎‏‏‎ ‎‏‏‎ ‎‏‏‎ ‎Idempotence Middy middleware for your AWS Lambdas

makes any request idempotent across nodejs frameworks like nestjs, express, fastify

Stripe-style Idempotency-Key middleware for Hono with KV/D1/Memory stores

Convex component for retrying idempotent actions.

Enterprise-grade Event-Driven Webhook Service built with NestJS. Architected for high-reliability processing of mission-critical data from Stripe, PayPal, and GitHub. Features include HMAC security, idempotency control, BullMQ-based asynchronous processing with DLQ patterns, and distributed tracing with OpenTelemetry.

High-performance Redis Streams queue integration for NestJS based on power-queues.

High-performance Redis Streams queue for Node.js with Lua-powered bulk XADD, idempotent workers, heartbeat locks, stuck-task recovery, retries, DLQ, and distributed processing.

Trust infrastructure for autonomous AI agents: decision assurance, action authorization, runtime controls, and verifiable lifecycle evidence.

Pix payment system demo — idempotent charges, state machine, webhook dedup, structured logs with correlation_id. Node.js + NestJS + TypeORM + PostgreSQL.

AegisPay is a production-grade payment orchestration SDK built with TypeScript and Node.js, designed for high-volume, mission-critical payment processing. It leverages advanced concurrency control, formal state machines, transactional outbox, event sourcing, and intelligent routing to ensure correctness, reliability, and scalability.

Production-style offline-first synchronization architecture: local IndexedDB queue, batched POS sync, idempotent backend (externalId), retry/backoff, endpoint grouping, payload limits, and dead-letter handling. Built with Next.js, TypeScript, NestJS, and PostgreSQL.

EventPay - Stripe Inspired Payment Events & Webhook System

Deterministic identity-resolution engine in TypeScript: Zod-validated handlers, mocked deps, and a CLI that mirrors the future HTTP API.

Async payment processing engine built with Go, Redis, and Postgres. Features a queue-driven worker, double-entry ledger, idempotency, retry engine with backoff, and a live Next.js observability dashboard.

Booking layer for AI agents. Atomic holds, conflict handling, idempotent confirms.

Runtime guardrails for TypeScript AI agents. Prevents duplicate tool calls, enforces per-user cost budgets, and gates irreversible actions. MIT.

A Spring Boot and React banking architecture implementing a double-entry ledger, idempotent UPI transaction processing, and deterministic pessimistic locking.

A Paystack webhook processor with JWT auth, email notifications, and a protected dashboard — built with Fastify, TypeScript, and PostgreSQL.

No duplication of operation