Farcaster Message Validity

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Use Case

Farcaster is a social media platform that allows users to post messages to a decentralized network. Although it’s not a DeFi protocol with a lot of funds at stake, it’s still important to make sure that messages are valid and usernames are unique.

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Explanation

Check that a message is valid by checking the signature of the message as well as making sure content size limits are respected etc.

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Code Example

• Pre-state: Record message chain state
• Post-state: After message creation:
  • Signature validity
  • Parent message existence for replies
  • Content size limits respected
  • Rate limits enforced