Implement Event Emission Optimizations

[Shredder401k]

Difficulty: Medium
Type: Optimization

Summary

Optimize event emissions to reduce gas costs while maintaining necessary information for indexers.

Current Behaviour

Events include all data, may be verbose.

Expected Behaviour

Events include only essential data. Use topics efficiently. Minimize event size.

Suggested Implementation

• Use symbol_short for topics (max 9 chars)
• Include only essential data in event body
• Reference stream_id instead of full stream data
• Use compact data types where possible
• Consider off-chain indexing for detailed data

Files or Areas Likely Affected

• contracts/Contract-V1/src/lib.rs (optimize event emissions)

Acceptance Criteria

• Audit all event emissions
• Identify optimization opportunities
• Minimize event data size
• Use short topics (<= 9 chars)
• Remove redundant data
• Essential data still available for indexers
• Measure gas savings
• At least 5% reduction in event emission costs
• Indexers can still function properly
• Rustdoc explains event structure

Additional Notes

Events are for off-chain indexing. Include minimum necessary data. Large events waste gas.

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[uche102]

📋 Grainlify Application

@uche102 has applied to work on this issue as part of the Grainlify program.

Hi please i would like to work on this

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Repo Maintainers: To accept this application, review their application or assign @uche102 to this issue.

[KarenZita01]

Optimizing event emission will reduce unnecessary processing, improve system responsiveness, and ensure efficient resource utilization during high-volume operations. Drawing on experience in optimizing event-driven systems and application performance, I will review the current emission workflow, identify redundant events, and implement efficient batching, filtering, and asynchronous processing where appropriate.

[grantfox-oss]

🦊 GrantFox — @KarenZita01 has been assigned to this issue as part of the Third Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #1488)
2. Your PR will be reviewed by the StellarStream-HQ maintainers

Good luck! Track your progress on GrantFox.

[KarenZita01]

Implemented in PR #1573: #1573

Optimized meta_upd and fee event payloads by moving identifiers to topics and reducing body size. meta_upd body reduced from 3-field struct to single timestamp; fee body reduced from 6-field struct to (amount, bps) tuple.