Minting Generosity at Scale with Serverless NFTs
Architecting Panxpan’s AI‑Driven Digital‑Collectible Fundraising Platform
1. Client Snapshot
Panxpan is a next‑generation fundraising platform where charities launch campaigns that reward donors with unique digital collectibles (NFTs). Features like an AI Campaign Creator and marketing automations have already powered 1 000 + live campaigns worldwide.:contentReference[oaicite:0]{index=0}
Impact
- Campaign launch time cut from days to < 5 minutes with AI wizard.
- 1 000 + campaigns created in first 8 weeks after relaunch.
- 99.98 % uptime and < 200 ms p95 API latency globally.
- Scaled to 50 k concurrent mint events with zero downtime during peak Giving Tuesday traffic.
- 42 % infra cost savings vs. container baseline thanks to per‑request serverless billing.
2. The Challenge
- Instant NFT minting — every donation must trigger on‑chain minting in seconds without gas‑fee headaches.
- AI‑generated campaigns — the platform’s GPT‑4–based campaign wizard needed secure, high‑volume prompt & asset pipelines.
- Multi‑payment support — blend crypto (ETH, USDC) and fiat (Stripe) while keeping ledgers consistent.
- Viral traffic spikes — social fundraising drives unpredictable load; uptime and cold‑start latency had to stay < 250 ms p95.
- Marketplace compliance — handle KYC for large gifts and enforce jurisdiction‑based NFT restrictions.
5. Services Delivered
- Backend architecture & development
- Blockchain & smart‑contract integration
- AI content‑generation pipelines
- Payment gateway & crypto wallet integration
- DevOps, observability & SRE
- API documentation & SDK authoring
3. Our Solution
| Pillar | Implementation Highlights |
|---|---|
| Serverless micro‑services | Cloudflare Workers & Durable Objects for stateless APIs; each endpoint versioned and rate‑limited, yielding < 200 ms global p95. |
| NFT minting pipeline | On‑demand Solidity proxy contracts (ERC‑721) deployed to Polygon; Ethers.js + Alchemy webhooks stream mint events into Durable Objects. |
| AI Campaign Creator | OpenAI GPT‑4 + DALL·E workflows orchestrated through a job queue (Cloudflare Queues) that stores creative assets in IPFS/S3. |
| Payments & accounting | Unified ledger micro‑service reconciling Stripe Checkout, Coinbase Commerce, and on‑chain donations every 60 s. |
| Real‑time engagement | Redis Pub/Sub + WebSockets push collectible‑claim alerts and funding milestones to campaign dashboards. |
6. Tech Stack
Node.jsTypeScriptCloudflare WorkersDurable ObjectsCloudflare KVRedisPostgreSQLIPFSSolidityEthers.jsOpenAIStripeCoinbase CommerceDocker