Date: May 28, 2025
Venue: Hashed Lounge, Seoul
Featuring: Chainlink Labs × Startale Cloud Services × Soneium

A Practical Bridge Between Off-Chain and On-Chain

The May 28 Chainlink x SCS Dev Session went beyond theory; it showcased a real, working PoC that proved how simple, seamless, and secure Web3 automation can be.

The demo illustrated how users could receive NFTs directly to their wallet simply by posting a tweet containing a coupon code and wallet address. No forms, no manual verification! just a social post triggering an automated on-chain reward.

PoC Flow Summary

Here’s how the proof-of-concept worked in detail:

1. User Action:
   A participant tweets a line such as
   COUPON: ABC123, WALLET: 0x1234...abcd
2. Off-Chain Verification:
   A lightweight off-chain service monitors the tweets, validates the coupon code, filters spam, and checks for duplicates.
3. On-Chain Execution:
   Once verified, Chainlink Functions securely transmit the data to a smart contract.
   The contract mints and sends the NFT reward to the specified wallet address.

This end-to-end workflow demonstrated the power of Chainlink’s modular infrastructure, connecting social data, off-chain computation, and blockchain execution in a trustworthy way.

Key Takeaways

• Builder-friendly architecture:
  Chainlink Functions and Automation eliminate the complexity of syncing off-chain events with on-chain logic.
• Real-world applicability:
  The use case can easily extend to event ticketing, loyalty rewards, or gated content NFTs — all with social verification as the trigger.
• Security & Privacy:
  The session discussed critical safeguards: rate-limiting, nonce validation, and alternatives to publicly posting wallet addresses (e.g., signed DM endpoints).

Session Highlights

• Discussion on how Chainlink Functions can power off-chain data triggers for NFT minting, payments, or proof-of-attendance tokens.
• Insights on integrating Twitter APIs and handling spam, duplicates, and coupon expiry logic.
• Live Q&A with developers emphasizing UX, cost optimization (gas efficiency), and security architecture.