Implement message signing in Blinks to verify and authenticate users without paying transaction fees.
Feature | Message Signing | Blockchain Transaction |
---|---|---|
Cost | Free | Requires SOL for fees |
Speed | Instant | Requires confirmation (~400ms) |
Storage | Off-chain (database) | On-chain (permanent) |
Use Cases | Authentication, feedback, surveys | Payments, NFT minting, DeFi |
Verification | Cryptographic signature | Blockchain consensus |
issuedAt
helps detect stale requests